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Huainan, China

Anhui University of Science and Technology one of the five key universities in Anhui Province, China. It is situated in Huainan City, Anhui Province, which is also known as a green city and as a base of science and education in China. Covering a land area of 1,300 mu, the university is divided into three branches. Wikipedia.

Zha W.,Anhui University of Science and Technology | Zha W.,Brookhaven National Laboratory
Nuclear Physics A | Year: 2014

We report the measurements by the STAR Collaboration of J/ψ invariant yields as a function of transverse momentum at mid-rapidity (|. y|. <. 1.0) in p+. p collisions at s=500 GeV, in Au. +. Au collisions at sNN=39, 62.4 and 200 GeV, and in U. +. U collisions at sNN=193 GeV. The centrality, beam energy and collision system dependences of J/ψ production and nuclear modification factors are discussed. We also report the ratio of ψ(2. S) to J/ψ yields in p+. p collisions at s=500 GeV and ϒ{hooked} production in U. +. U collisions at sNN=193 GeV. © 2014 Elsevier B.V.

Li X.,Brown University | Li X.,Anhui University of Science and Technology
Soft Matter | Year: 2013

The understanding of shape transformations and dynamic behaviors of membrane vesicles is of fundamental importance in biological and physical sciences. In this study, dissipative particle dynamics (DPD) simulations are employed to study the shape transformations of bilayer vesicles formed from amphiphilic diblock copolymers. A plethora of complex vesicle shapes, including some that have not been reported in previous simulation studies on membrane vesicles such as boomerang shapes and a couple of different starfish-shaped vesicles, are obtained in the simulations. These simulated polymer vesicles agree with theoretically derived vesicle shapes based on the bilayer couple model. © 2013 The Royal Society of Chemistry.

Fu Z.,Shanxi University | Huang L.,Shanxi University | Meng Z.,Shanxi University | Wang P.,Shanxi University | And 5 more authors.
Nature Physics | Year: 2014

The search for topological superconductors is a challenging task. One of the most promising directions is to use spin-orbit coupling through which an s-wave superconductor can induce unconventional p-wave pairing in a spin-polarized metal. Recently, synthetic spin-orbit couplings have been realized in cold-atom systems where instead of a proximity effect, s-wave pairing originates from a resonant coupling between s-wave molecules and itinerant atoms. Here we demonstrate a dynamic process in which spin-orbit coupling coherently produces s-wave Feshbach molecules from a fully polarized Fermi gas, and induces a coherent oscillation between these two. This demonstrates experimentally that spin-orbit coupling does coherently couple singlet and triplet states, and implies that the bound pairs of this system have a triplet p-wave component, which can become a topological superfluid by further cooling to condensation and confinement to one dimension. © 2014 Macmillan Publishers Limited.

Shi J.-J.,Nanjing University | Shi J.-J.,Anhui University of Science and Technology | Zhu J.-J.,Nanjing University
Electrochimica Acta | Year: 2011

A novel electrochemical sensor for chlorophenols was fabricated by using the Pd-graphene nanocomposite and ions liquid. The Pd-graphene nanocomposite was prepared via a sonoelectrochemical route, and the possible formation mechanism was proposed. Transmission electron microscopy, scanning electron microscopy, X-ray diffraction and Raman spectrum were used for the characterization of structure and morphology of the nanocomposite. The experimental results showed that Pd nanospheres comprised of small Pd nanoparticles were uniformly attached on graphene sheets. The electrocatalytic properties were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which indicated that the Pd-graphene nanocomposite had high activity for chlorophenol oxidation. Herein, 2-chlorophenol was selected as the model molecules. The results showed that graphene played an important role in the fabrication of the chlorophenols sensor. The nanocomposite with large electrochemical active surface led to the excellent electrocatalytic activity, and ionic liquid further enhanced the catalytic activity of Pd-graphene for chlorophenols. © 2011 Elsevier Ltd. All Rights Reserved.

Luo K.,Anhui University of Science and Technology | Metzler R.,TU Munich
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2010

Using two-dimensional Langevin dynamics simulations, we investigate the dynamics of polymer translocation into a fluidic channel with diameter R through a nanopore under a driving force F. Due to the crowding effect induced by the partially translocated monomers, the translocation dynamics is significantly altered in comparison to an unconfined environment, namely, we observe a nonuniversal dependence of the translocation time τ on the chain length N. τ initially decreases rapidly and then saturates with increasing R, and a dependence of the scaling exponent α of τ with N on the channel width R is observed. The otherwise inverse linear scaling of τ with F breaks down and we observe a minimum of α as a function of F. These behaviors are interpreted in terms of the waiting time of an individual segment passing through the pore during translocation. © 2010 The American Physical Society.

Wang S.,Anhui University of Science and Technology | Ji Q.,Rensselaer Polytechnic Institute
IEEE Transactions on Affective Computing | Year: 2015

Video affective content analysis has been an active research area in recent decades, since emotion is an important component in the classification and retrieval of videos. Video affective content analysis can be divided into two approaches: Direct and implicit. Direct approaches infer the affective content of videos directly from related audiovisual features. Implicit approaches, on the other hand, detect affective content from videos based on an automatic analysis of a user's spontaneous response while consuming the videos. This paper first proposes a general framework for video affective content analysis, which includes video content, emotional descriptors, and users' spontaneous nonverbal responses, as well as the relationships between the three. Then, we survey current research in both direct and implicit video affective content analysis, with a focus on direct video affective content analysis. Lastly, we identify several challenges in this field and put forward recommendations for future research.

Feng D.-J.,Chinese University of Hong Kong | Huang W.,Anhui University of Science and Technology
Communications in Mathematical Physics | Year: 2010

For general asymptotically sub-additive potentials (resp. asymptotically additive potentials) on general topological dynamical systems, we establish some variational relations between the topological entropy of the level sets of Lyapunov exponents, measure-theoretic entropies and topological pressures in this general situation. Most of our results are obtained without the assumption of the existence of unique equilibrium measures or the differentiability of pressure functions. Some examples are constructed to illustrate the irregularity and the complexity of multifractal behaviors in the sub-additive case and in the case that the entropy map is not upper-semi continuous. © 2010 Springer-Verlag.

Yang C.,Anhui University of Science and Technology | Yang C.,Brookhaven National Laboratory
Nuclear Physics A | Year: 2014

We present the direct photon production for 1

Punsly B.,4014 Emerald Street No. 116 | Zhang S.,Anhui University of Science and Technology
Astrophysical Journal Letters | Year: 2011

In this Letter, the properties of the extended radio emission form Sloan Digital Sky Survey Data Release 7 quasars with 0.4 < z < 0.8 is studied. This low-redshift sample is useful since any corresponding FIRST radio observations are sensitive enough to detect extended flux in even the weakest Fanaroff-Riley II (FR II) radio sources. In the sample, 2.7% of the sources have detectable extended emission on larger than galactic scales (>20-30 kpc). The frequency of quasars with FR II level extended radio emission is ≈2.3% and >0.4% of quasars have FR I level extended radio emission. The lower limit simply reflects the flux density limit of the survey. The distribution of the long-term time-averaged jet powers of these quasars, Q̄, has a broad peak ∼3 × 1044 erg s-1 that turns over below 10 44 erg s-1 and sources above 1045 erg s -1 are extremely rare. It is found that the correlation between the bolometric (total thermal) luminosity of the accretion flow, L bol, and is not strong. The correlation of Q̄ with narrow line luminosity is stronger than the correlation with broad line luminosity and the continuum luminosity. It is therefore concluded that previous interpretations of correlations of Q̄ with narrow line strengths in radio galaxies as a direct correlation of jet power and accretion power have been overstated. It is explained why this interpretation mistakenly overlooks the sizeable fraction of sources with weak accretion luminosity and powerful jets discovered by Ogle et al. © 2011. The American Astronomical Society. All rights reserved.

Zhang B.,Sun Yat Sen University | Hua Z.,Anhui University of Science and Technology
Computers and Industrial Engineering | Year: 2010

This paper investigates a portfolio approach to multi-product newsboy problem with budget constraint, in which the procurement strategy for each newsboy product is designed as portfolio contract. A portfolio contract consists of a fixed-price contract and an option contract. We model the problem as a profit-maximization model, and propose an efficient solution procedure after investigating the structural properties of the model. We conduct numerical studies to show the efficiency of the proposed solution procedure, and to compare three models with different procurement contracts, i.e., fixed-price contract, option contract, and portfolio contract. Numerical results are shown to demonstrate the advantage of the portfolio model, and sensitivity analysis is provided for obtaining some managerial insights. © 2010 Elsevier Ltd. All rights reserved.

Tian S.X.,Anhui University of Science and Technology
Physical Chemistry Chemical Physics | Year: 2012

Positive-negative photoion pairs can be formed in the photoexcitation of molecules in the broad energy range from vacuum ultraviolet to soft X-ray. Synchrotron radiation is the most suitable photon source and state-of-the-art mass spectrometry techniques have been successfully applied in the experimental studies of such ion-pair photodissociation dynamics. This perspective will briefly review the recent progress on this topic and provide a general description of the mechanisms of ion-pair photodissociation dynamics of polyatomic molecules. Challenges in the understanding of ion-pair photodissociation in the higher photon energy range are also discussed. © the Owner Societies 2012.

Cong S.,Anhui University of Science and Technology
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | Year: 2012

We investigate in depth the Lyapunov-based quantum control methods including the relation between the Lyapunov-based control and the optimal control, the Lyapunov function and the performance index, the range of application and the existing problems. Combining our results with intrinsic properties of quantum system, we develop several control schemes with improvements for different objectives such as the regulation of eigenstates, superposition state or mixed state. The design ideas, the physical significance and the range of suitable applications are analyzed. The designs method employing Lyapunov stability theorem in controlling quantum system is systemized.

Culcer D.,Anhui University of Science and Technology | Culcer D.,CAS Institute of Theoretical Physics
Physica E: Low-Dimensional Systems and Nanostructures | Year: 2012

This paper reviews recent theoretical and experimental work on transport due to the surface states of three-dimensional topological insulators. The theoretical focus is on longitudinal transport in the presence of an electric field, including Boltzmann transport, quantum corrections and weak localization, as well as longitudinal and Hall transport in the presence of both electric and magnetic fields and/or magnetizations. Special attention is paid to transport at finite doping, and to the π-Berry phase, which leads to the absence of backscattering, Klein tunneling and half-quantized Hall response. Signatures of surface states in ordinary transport and magnetotransport are identified. The review also covers transport experiments of the past years, tracing its evolution from the initial obscuring of surface transport by bulk transport to the increasing success of experimental work in identifying transport due to the surface states. Current and likely future experimental challenges are given prominence and the present status of the field is assessed. © 2011 Elsevier B.V.

Xia X.,Emory University | Zeng J.,Anhui University of Science and Technology | Zhang Q.,East China Normal University | Moran C.H.,Emory University | Xia Y.,Emory University
Journal of Physical Chemistry C | Year: 2012

This feature article introduces our recent work on understanding the roles played by citrate and poly(vinyl pyrrolidone) (PVP) as capping agents in seed-mediated syntheses of Ag nanocrystals with controlled shapes. We have demonstrated that citrate and PVP selectively bind to Ag(111) and Ag(100) surfaces, respectively, and thus favor the formation of Ag nanocrystals enclosed preferentially by {111} or {100} facets. In addition, we have quantified the coverage density of PVP adsorbed on the surface of Ag nanocubes. On the basis of the mechanistic understanding, a series of Ag nanocrystals with controlled shapes and sizes have been successfully synthesized by using different combinations of seeds and capping agents: single-crystal spherical/cubic seeds with citrate for cuboctahedrons and octahedrons or with PVP for cubes and bars and plate-like seeds with citrate for enlarged thin plates or with PVP for thickened plates. © 2012 American Chemical Society.

Huang Y.,Anhui University of Science and Technology
Procedia Engineering | Year: 2011

This paper is designed to solve problems in energy-saving buildings in China. Relevant countermeasures were made on the basis of good investigations of the situation of energy consumption and energy-efficiency. The study will play a positive guiding role in promoting the development of energy saving of buildings, settling problems in reality. © 2011 Published by Elsevier Ltd.

Wang Z.F.,Anhui University of Science and Technology | Wang Z.F.,University of Utah | Liu F.,University of Utah
Physical Review Letters | Year: 2015

Graphene, the first discovered 2D Dirac material, has had a profound impact on science and technology. In the last decade, we have witnessed huge advances in graphene related fundamental and applied research. Here, based on first-principles calculations, we propose a new 2D Dirac band on the Si(111) surface with 1/3 monolayer halogen coverage. The sp3 dangling bonds form a honeycomb superstructure on the Si(111) surface that results in an anisotropic Dirac band with a group velocity (∼106m/s) comparable to that in graphene. Most remarkably, the Si-based surface Dirac band can be used to excite a tunable THz plasmon through electron-hole doping. Our results demonstrate a new way to design Dirac states on a traditional semiconductor surface, so as to make them directly compatible with Si technology. We envision this new type of Dirac material to be generalized to other semiconductor surfaces with broad applications. © 2015 American Physical Society. © 2015 American Physical Society.

This paper proposes a method for the evaluation of total factor productivity (TFP) based on the super-efficiency Data Envelopment Analysis (DEA) model and the Malmquist-Luenberger index. Under China's constraints for carbon emissions, data sampled from eight cities in two large areas in Anhui Province in central China, namely the Wan Jiang region and the northern Anhui region, from 2001 to 2009 were cited as the sample for the analysis of the low-carbon TFP index. An analysis of the low carbon index changes and composition during the period of economic transformation was also conducted. The empirical analysis results indicate that the technical efficiency change has a lower effect on the progress of total factor productivity and that technological progress exerts the dominant force in total factor productivity growth. This study also performed Hausman tests of the factors influencing the total factor productivity and suggested advances in certain policies accordingly. © 2014 Elsevier Ltd.

Weise T.,Anhui University of Science and Technology | Chiong R.,University of Newcastle
Neurocomputing | Year: 2015

Stochastic approaches such as evolutionary algorithms have been widely used in various science and engineering problems. When comparing the performance of a set of stochastic algorithms, it is necessary to statistically evaluate which algorithms are the most suitable for solving a given problem. The outcome of statistical tests comparing N≥2 processes, where N is the number of algorithms, is often presented in tables. This can become confusing for larger numbers of N. Such a scenario is, however, very common in both numerical and combinatorial optimization as well as in the domain of stochastic algorithms in general. In this letter, we introduce an alternative way of visually presenting the results of statistical tests for multiple processes in a compact and easy-to-read manner using a directed acyclic graph (DAG), in the form of a simplified Hasse diagram. The rationale of doing so is based on the fact that the outcome of the tests is always at least a strict partial order, which can be appropriately presented via a DAG. The goal of this brief communication is to promote the use of this approach as a means for presenting the results of comparisons between different optimization methods. © 2014 Elsevier B.V.

Zhao K.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemistry - A European Journal | Year: 2014

A highly enantioselective conjugate addition of Grignard reagents to 3-silyl unsaturated esters to deliver synthetically useful chiral β-silylcarbonyl compounds was developed. The synthetic value of this methodology was further illustrated by the synthesis of enantioenriched β-hydroxyl esters and the facile access granted to various α-chiral allylic silanes. A plethora of diastereoselective transformations of β-silylenolates were also investigated and afforded manifold organosilanes that contained contiguous stereogenic centers with excellent enantioselectivity. © 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Culcer D.,Anhui University of Science and Technology | Culcer D.,University of California at Santa Barbara
Physical Review B - Condensed Matter and Materials Physics | Year: 2011

Chiral surface states in topological insulators are robust against interactions, nonmagnetic disorder, and localization, yet topology does not yield protection in transport. This work presents a theory of interacting topological insulators in an external electric field, starting from the quantum Liouville equation for the many-body density matrix. Out of equilibrium, topological insulators acquire a current-induced spin polarization. Electron-electron interactions renormalize the nonequilibrium spin polarization and charge conductivity, and disorder in turn enhances this renormalization by a factor of 2. Topological insulator phenomenology remains intact in the presence of interactions out of equilibrium, and an exact correspondence exists between the mathematical frameworks necessary for the understanding of the interacting and noninteracting problems. © 2011 American Physical Society.

Liu X.-Q.,University of Chinese Academy of Sciences | Song W.-J.,University of Chinese Academy of Sciences | Sun T.-M.,Anhui University of Science and Technology | Zhang P.-Z.,Suzhou GenePharma Co. | Wang J.,University of Chinese Academy of Sciences
Molecular Pharmaceutics | Year: 2011

MiRNAs are viable therapeutic targets for cancer therapy, but the targeted delivery of miRNA or its anti-miRNA antisense oligonucleotides (AMOs) remains a challenge. We report here a PEGylated LPH (liposome-polycation-hyaluronic acid) nanoparticle formulation modified with cyclic RGD peptide (cRGD) for specific and efficient delivery of AMO into endothelial cells, targeting αvβ3 integrin present on the tumor neovasculature. The nanoparticles effectively delivered anti-miR-296 AMO to the cytoplasm and downregulated the target miRNA in human umbilical vein endothelial cells (HUVECs), which further efficiently suppressed blood tube formulation and endothelial cell migration, owing to significant upregulation of hepatocyte growth factor-regulated tyrosine kinase substrate (HGS), whereas nanoparticles without cRGD modification showed only little AMO uptake and miRNA silencing activity. In vivo assessment of angiogenesis using Matrigel plug assay also demonstrated that cRGD modified LPH nanoparticles have potential for antiangiogenesis in miRNA therapeutics. With the delivery of anti-miR-296 AMO by targeted nanoparticles, significant decrease in microvessel formulation within Matrigel was achieved through suppressing the invasion of CD31-positive cells into Matrigel and prompting HGS expression in angiogenic endothelial cells. © 2011 American Chemical Society.

Wu Z.,University of Minnesota | Wu Z.,Anhui University of Science and Technology | Wentzcovitch R.M.,University of Minnesota
Physical Review B - Condensed Matter and Materials Physics | Year: 2011

First-principles quasiharmonic calculations play a very important role in mineral physics because they can predict the structural and thermodynamic properties of materials at pressure and temperature conditions of the Earth's interior that are still challenging for experiments. They also enable calculations of thermal elastic properties by providing second-order derivatives of free energies with respect to strain. The latter are essential to interpret seismic tomography of the mantle in terms of temperature, composition, and mineralogy, in the context of geophysical processes. However, these are exceedingly demanding computations requiring up to ∼103 parallel jobs running on tens or more processors each. Here we introduce an analytical and computationally simpler approach that requires only calculations of static elastic constants and phonon density of states for unstrained configurations. This approach, currently implemented for crystals with up to orthorhombic symmetry, decreases the computational effort, i.e., CPU time and human labor, by up to two orders of magnitude. Results for the major mantle phases periclase (MgO) and forsterite (α-Mg2SiO4) show excellent agreement with previous first-principles results and experimental data. © 2011 American Physical Society.

Culcer D.,Anhui University of Science and Technology | Das Sarma S.,University of Maryland University College
Physical Review B - Condensed Matter and Materials Physics | Year: 2011

The anomalous Hall effect due to the surface conduction band of three-dimensional topological insulators with an out-of-plane magnetization is always dominated by an intrinsic topological term of the order of the conductivity quantum. We determine the contributions due to the band structure, skew scattering, side jump, and magnetic impurities on the same footing, demonstrating that the topological term, renormalized due to disorder, overwhelms all other terms, providing an unmistakable signature of Z2 topological order. Uncharacteristically, skew scattering contributes in the Born approximation as well as in the third order in the scattering potential, while in addition to the side-jump scattering term we identify a different intrinsic side-jump term of a similar magnitude. These, however, never overwhelm the topological contribution. © 2011 American Physical Society.

Li Y.,University of California at San Diego | Zhou X.,Anhui University of Science and Technology | Wu C.,University of California at San Diego
Physical Review B - Condensed Matter and Materials Physics | Year: 2012

We investigate topological insulating states in both two and three dimensions with the harmonic potential and strong spin-orbit couplings breaking the inversion symmetry. Landau-level-like quantization appear with the full two- and three-dimensional rotational symmetry and time-reversal symmetry. Inside each band, states are labeled by their angular momenta over which energy dispersions are strongly suppressed by spin-orbit coupling, to being nearly flat. The radial quantization generates energy gaps between neighboring bands at the order of the harmonic frequency. Helical edge or surface states appear on open boundaries characterized by the Z 2 index. These Hamiltonians can be viewed from the dimensional reduction of the high-dimensional quantum Hall states in three- and four-dimensional flat spaces. These states can be realized with ultracold fermions inside harmonic traps with synthetic gauge fields. © 2012 American Physical Society.

Ling Q.,Anhui University of Science and Technology
Optimal Control Applications and Methods | Year: 2013

By realizing the feedback paths over communication networks, we get a class of networked control systems (NCSs), where the network's quality-of-service (QoS) is commonly characterized by the average dropout rate of feedback data packets. The control performance of an NCS however, is determined not only by the average dropout rate but also by the dropout pattern of feedback data packets. This paper provides a systematic way to determine the optimal dropout pattern (policy) under a given average dropout rate, where the performance is measured by the output signal power under an exogenous white noise. By modeling the finite-memory dropout policies with the general Markov chain, this paper formulates the optimal dropout policy design into the optimization of parameters of a dropout Markov chain. That optimization is first solved by an augmented Lagrangian gradient method, which may be stuck at local optima because of the problem's non-convexity. To compensate this weakness, we apply the branch-and-bound method to the optimization whose constraints are bilinear. The branch-and-bound method can approach the global optimal solution with any desired tolerance in finite steps. The obtained optimal dropout policy may be interpreted as a network's QoS constraint whose enforcement provides a hard guarantee on the control system's performance. An example is used to illustrate the effectiveness of the achieved results. Copyright © 2012 John Wiley & Sons, Ltd. Copyright © 2012 John Wiley & Sons, Ltd.

Tian G.,KTH Royal Institute of Technology | Luo Y.,KTH Royal Institute of Technology | Luo Y.,Anhui University of Science and Technology
Physical Review B - Condensed Matter and Materials Physics | Year: 2011

We study electroluminescence from molecules confined in a scanning tunneling microscope based on a recently proposed density-matrix approach. The molecule is treated by a two-state model with each state consisting of a set of vibrational energy levels. The interband transition probabilities are described by Franck-Condon factors as calculated from a harmonic model. The role played by the tunneling electron as well as by the surface plasmon resonance is investigated. The dependence of the electron-tunneling-induced electroluminescence on the temperature, the bias voltage, the coupling strength between the molecule and the electrodes, and the radiative decay rate of the excited state has been systematically studied. It is found that under high temperature, due to the thermally assisted electron tunneling, photon emissions can still be detected when the bias voltage is less than the excitation energy of the molecule. We also find that when the molecule is asymmetrically coupled to the electrodes, electroluminescence does not strictly follow the Franck-Condon distribution. Our simulations also show that the increase of the radiative decay rate of the excited state cannot lead to the hot luminescence from higher vibrational levels. The involvement of the surface plasmon can drastically alter the spectral profiles, resulting in hot luminescence from molecules, when the surface plasmon in a scanning tunneling microscope is of high strength and ultrashort duration. The influence of the strength and the duration of the plasmon pulse on the electroluminescence spectra has been discussed. © 2011 American Physical Society.

Huang J.-J.,Chongqing University | Huang H.,Anhui University of Science and Technology | Wang X.,Chongqing University
Physics of Fluids | Year: 2014

In this work, the motion of a two-dimensional drop on a surface with stepwise wettability gradient (WG) is studied numerically by a hybrid lattice-Boltzmann finitedifference method. We incorporate the geometric wetting boundary condition that allows accurate implementation of a contact angle hysteresis (CAH) model. The method is first validated through a series of tests that check different constituents of the numerical model. Then, simulations of a drop on a wall with given stepwise WG are performed under different conditions. The effects of the Reynolds number, the viscosity ratio, the WG, as well as the CAH on the drop motion are investigated in detail. It was discovered that the shape of the drop in steady motion may be fitted by two arcs that give two apparent contact angles, which are related to the respective contact line velocities and the relevant contact angles (that specify theWG and CAH) through the relation derived by Cox ["The dynamics of the spreading of liquids on a solid surface. Part 1. viscous flow," J. Fluid Mech. 168, 169-194 (1986)] if the slip length in simulation is defined according to Yue et al. ["Sharp-interface limit of the Cahn-Hilliard model for moving contact lines," J. Fluid Mech. 645, 279-294 (2010)]. It was also found that the steady capillary number of the drop is significantly affected by the viscosity ratio, the magnitudes of the WG, and the CAH, whereas it almost shows no dependence on the Reynolds number. © 2014 AIP Publishing LLC.

Shao Q.,Soochow University of China | Shao Q.,Anhui University of Science and Technology | Que R.,Soochow University of China | Shao M.,Soochow University of China | And 2 more authors.
Advanced Functional Materials | Year: 2012

Copper nanoparticles grafted on a silicon wafer are fabricated by reducing copper ions with silicon-hydrogen bonds and assembling them in situ on the Si wafer. The nanoparticles, with an average size of 20 nm, grow uniformly and densely on the Si wafer, and they are used as substrates for surface-enhanced Raman scattering. These substrates exhibit excellent enhancement in the low concentration detection (1 × 10 -9 M) of rhodamine 6G with an enhancement factor (EF) of 2.29 × 10 7 and a relative standard deviation (RSD) of <20%. They are also employed to detect sudan-I dye with distinguished sensitivity and uniformity. The results are interesting and significant because Cu substrates are otherwise thought to be poor. These effects might provide new ways to think about surface-enhanced Raman scattering based on Cu substrates. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Giunti C.,National Institute of Nuclear Physics, Italy | Laveder M.,University of Padua | Li Y.F.,CAS Institute of High Energy Physics | Long H.W.,Anhui University of Science and Technology
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

We discuss the implications for short-baseline electron neutrino disappearance in the 3+1 mixing scheme of the recent Troitsk bounds on the mixing of a neutrino with mass between 2 and 100 eV. Considering the Troitsk data in combination with the results of short-baseline νe and ν̄e disappearance experiments, which include the reactor and Gallium anomalies, we derive a 2σ allowed range for the effective neutrino squared-mass difference between 0.85 and 43 eV2. The upper bound implies that it is likely that oscillations in distance and/or energy can be observed in radioactive source experiments. It is also favorable for the ICARUS@CERN experiment, in which it is likely that oscillations are not washed out in the near detector. We discuss also the implications for neutrinoless double-β decay. © 2013 American Physical Society.

Lu P.,Nanjing University of Aeronautics and Astronautics | Lu P.,University of Nebraska - Lincoln | Wu X.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Wu X.,Anhui University of Science and Technology | And 2 more authors.
Physical Chemistry Chemical Physics | Year: 2012

We investigate the strain-dependent electronic and magnetic properties of two-dimensional (2D) monolayer and bilayer MoS 2, as well as 1D MoS 2 nanoribbons and nanotubes using first-principles calculations. For 2D monolayer MoS 2 subjected to isotropic or uniaxial tensile strain, the direct band gap of MoS 2 changes to an indirect gap that decreases monotonically with increasing strain; while under the compressive strain, the original direct band gap is enlarged first, followed by gap reduction when the strain is beyond -2%. The effect of isotropic strain is even stronger than that of uniaxial strain. For bilayer MoS 2 subjected to isotropic tensile strain, its indirect gap reduces monotonically to zero at strain about 6%; while under the isotropic compressive strain, its indirect gap increases first and then reduces and turns into direct gap when the strain is beyond -4%. For strained 1D metallic zigzag MoS 2 nanoribbons, the net magnetic moment increases slightly with axial strain from about -5% to 5%, but drops to zero when the compressive strain is beyond -5% or increases with a power law beyond 5%. For 1D armchair MoS 2 nanotubes, tensile or compressive axial strain reduces or enlarges the band gap linearly, and the gap can be fully closed for nanotubes with relatively small diameter or under large tensile strain. For zigzag MoS 2 nanotubes, the strain effect becomes nonlinear and the tensile strain can reduce the band gap, whereas compressive strain can initially enlarge the band gap and then decrease it. The strain induced change in projected orbitals energy of Mo and the coupling between the Mo atom d orbital and the S atom p orbital are analyzed to explain the strong strain effect on the band gap and magnetic properties. © 2012 the Owner Societies.

Wolf R.A.,Rice University | Chen C.X.,Anhui University of Science and Technology | Toffoletto F.R.,Rice University
Journal of Geophysical Research: Space Physics | Year: 2012

The main goal of this paper is to estimate the errors involved in applying a quasi-static convection model such as the Rice Convection Model (RCM) or its equilibrium version (RCM-E), which neglect inertial currents, to treat the injection of fresh particles into the inner magnetosphere in a substorm expansion phase. The approach is based on the idea that the dipolarization process involves earthward motion of a bubble that consists of flux tubes that have lower values of the entropy parameter than the surrounding medium. Our tests center on comparing MHD simulations with RCM- and RCM-E-like quasi-static approximations, for cases where the bubble is considered to be a thin ideal-MHD filament. Those quasi-static solutions miss the interchange oscillations that are often a feature of the MHD results. RCM and, to a lesser extent, RCM-E calculations tend to overestimate the westward electric field at the ionospheric footprint of the bubble and underestimate its duration. However, both get the time integral of the E × B drift velocity right as well as the net energization of the particles in the filament. The quasi-static approximation is most accurate if its computed value of the braking time of the bubble's earthward motion is long compared to the period of the relevant interchange oscillation. Comparison of MHD filament simulations of interchange instability with corresponding RCM calculations suggests a similar validity criterion. For plasma sheet conditions, the quasi-static approximation is typically best if the background medium has low , worst if it consists of highly stretched field lines. Copyright 2012 by the American Geophysical Union.

Wolf R.A.,Rice University | Chen C.X.,Anhui University of Science and Technology | Toffoletto F.R.,Rice University
Journal of Geophysical Research: Space Physics | Year: 2012

This paper presents a quantitative theory of "interchange oscillations," which occur as an earthward-moving low-entropy plasma bubble slows and eventually comes to rest. Our theoretical picture is based on an idealized situation where an ideal-MHD magnetic filament moves without friction through a stationary background that represents the plasma sheet. If the relevant region of the background plasma sheet is interchange stable, then the filament usually executes a damped oscillation about an equilibrium position, where its entropy parameter matches the local background. The oscillations are typically dramatic only if the equatorial plasma beta is greater than about one. We derive an approximate analytic formula for the oscillation period, which is not simply related to slow- or intermediate-wave travel times. For an oscillation that Panov and collaborators carefully studied using THEMIS data, our simple theory, though based on an unrealistic 2D background magnetic field, predicted an oscillation period that agrees with the observations within about 40%. The simulations suggest that the ionospheric oscillation should lag behind the magnetospheric one by between 40 and 90 degrees. Ionospheric conductance affects the damping rate, which maximizes for an auroral zone conductance ∼2 S. Adding a friction force acting between the filament and the background increases the decay rate of the oscillation. Copyright 2012 by the American Geophysical Union.

Zhu Z.,Anhui University of Science and Technology
IEEE Communications Letters | Year: 2011

We propose and investigate energy-saving algorithms for DOCSIS-3.0 networks. By proactively monitoring traffic load, the algorithms achieve network-wide energy saving by re-adjusting CM's bonding groups and shutting down under-utilized upstream/downstream ports on the CMTS. Numerical simulations indicate that by applying the CM side algorithm only, we can achieve a possible 17.6% energy saving for 8192 CMs. We also study the fundamental tradeoff between energy-saving and packet queuing delay and estimate the upper bounds of the delays. © 2011 IEEE.

Liu W.,Anhui University of Science and Technology
Optics Letters | Year: 2015

We demonstrate that surface plasmons on a nanoscale metallic array can be transformed into radiation waves via an exotic Smith-Purcell effect. Although the radiation frequency and direction satisfy the Smith-Purcell relation, it is coherent radiation with directions specified, which is essentially different from the ordinary Smith-Purcell radiation. Its radiation spectral density is an order of magnitude higher. By adjusting the material and structure of the array, the radiation frequency can be tuned from an infrared to ultraviolet region. Its remarkable advantages in intensity, coherence, tunability, and miniature size indicate new prospects in developing nanoscale light sources and related techniques. © 2015 Optical Society of America.

Chow S.-N.,Georgia Institute of Technology | Huang W.,Anhui University of Science and Technology | Li Y.,Georgia Institute of Technology | Zhou H.,Georgia Institute of Technology
Archive for Rational Mechanics and Analysis | Year: 2012

The classical Fokker-Planck equation is a linear parabolic equation which describes the time evolution of the probability distribution of a stochastic process defined on a Euclidean space. Corresponding to a stochastic process, there often exists a free energy functional which is defined on the space of probability distributions and is a linear combination of a potential and an entropy. In recent years, it has been shown that the Fokker-Planck equation is the gradient flow of the free energy functional defined on the Riemannian manifold of probability distributions whose inner product is generated by a 2-Wasserstein distance. In this paper, we consider analogous matters for a free energy functional or Markov process defined on a graph with a finite number of vertices and edges. If N ≧ 2 is the number of vertices of the graph, we show that the corresponding Fokker-Planck equation is a system of Nnonlinear ordinary differential equations defined on a Riemannian manifold of probability distributions. However, in contrast to stochastic processes defined on Euclidean spaces, the situation is more subtle for discrete spaces. We have different choices for inner products on the space of probability distributions resulting in different Fokker-Planck equations for the same process. It is shown that there is a strong connection but there are also substantial discrepancies between the systems of ordinary differential equations and the classical Fokker-Planck equation on Euclidean spaces. Furthermore, both systems of ordinary differential equations are gradient flows for the same free energy functional defined on the Riemannian manifolds of probability distributions with different metrics. Some examples are also discussed. © 2011 Springer-Verlag.

Huang M.-X.,Anhui University of Science and Technology | Klemm A.,University of Bonn | Poretschkin M.,University of Bonn
Journal of High Energy Physics | Year: 2013

We use mirror symmetry, the refined holomorphic anomaly equation and modularity properties of elliptic singularities to calculate the refined BPS invariants of stable pairs on non-compact Calabi-Yau manifolds, based on del Pezzo surfaces and elliptic surfaces, in particular the half K3. The BPS numbers contribute naturally to the five-dimensional N =1 supersymmetric index of M-theory, but they can be also interpreted in terms of the superconformal index in six dimensions and upon dimensional reduction the generating functions count N = 2 Seiberg-Witten gauge theory instantons in four dimensions. Using the M/F-theory uplift the additional information encoded in the spin content can be used in an essential way to obtain information about BPS states in physical systems associated to small instantons, tensionless strings, gauge symmetry enhancement in F-theory by [p, q]-strings as well as M-strings. © SISSA 2013.

Tu M.,Anhui University of Science and Technology
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2013

Based on depositing conditions of high gas and low permeability of coal seam group in Huainan mining area, this article analyzes the movement and failure characteristics of overlying strata, the movement and deformation characteristics of relief seam, the vertical zoning characteristics of mining fractures and stress zoning characteristics of relief seam through the analogue test. Conclusion is drawn that there are annular fracture area, vertical fracture area, and the remote relief seam fracture area from the roof of goaf in the first mining layer. According to the developing characteristics of the mining fracture areas, this article puts forward the deployment method of surface drilling in the drainage of pressure relief gas. The "[Formula is presented]"-type, "|"-type and "L"-type ground drilling are respectively put outside the starting cutting hole 1117(1) work face, inside the wind tunnel, and in front of the work face in Guqiao Coalmine. The relationship among the ground drilling locations, drilling type, drilling stability and relief gas drainage effect is probed into and found.

Liu W.,Anhui University of Science and Technology
Optics Letters | Year: 2015

A new radiation scheme, which adopts the high-order harmonics of a train of electron bunches to excite the highorder guided mode, is proposed and investigated by numerical simulations. By applying this scheme, the radiation with frequency close to 1 THz is generated from a waveguide with relatively big-size structure, and the bunching frequency is much lower than the radiation frequency.This scheme may offer a promising candidate for practical terahertz source since it breaks the two main bottlenecks of the vacuum electronic devices in the terahertz region: very tiny-size structure and unapproachable electron beam. © 2015 Optical Society of America.

Gao S.,Anhui University of Science and Technology | Gao S.,University of Kansas | O'Sullivan M.,Ciena | Hui R.,University of Kansas
Optics Express | Year: 2012

A coherent lidar system based on the measurement of complex optical field is demonstrated for the first time. An electro-optic in-phase/quadrature (I/Q) modulator is used in the lidar transmitter to realize carrier-suppressed complex optical field modulation in which the positive and the negative optical sidebands can carry independent modulation waveforms. A fiber-optic 90° hybrid is used in the lidar receiver for coherent heterodyne detection and to recover the complex optical field. By loading a constant modulation frequency on the lower optical sideband and a wideband linear frequency chirp on the upper sideband, vector velocity and target distance can be measured independently. The wide modulation bandwidth of this lidar system also enabled unprecedented range resolution and the capability of measuring high velocity unambiguously. © 2012 Optical Society of America.

Wu S.,University of Washington | Ross J.S.,University of Washington | Liu G.-B.,University of Hong Kong | Aivazian G.,University of Washington | And 10 more authors.
Nature Physics | Year: 2013

Crystal symmetry governs the nature of electronic Bloch states. For example, in the presence of time-reversal symmetry, the orbital magnetic moment and Berry curvature of the Bloch states must vanish unless inversion symmetry is broken. In certain two-dimensional electron systems such as bilayer graphene, the intrinsic inversion symmetry can be broken simply by applying a perpendicular electric field. In principle, this offers the possibility of switching on/off and continuously tuning the magnetic moment and Berry curvature near the Dirac valleys by reversible electrical control. Here we investigate this possibility using polarization-resolved photoluminescence of bilayer MoS2, which has the same symmetry as bilayer graphene but has a bandgap in the visible spectrum allowing direct optical probing. We find that in bilayer MoS2 the circularly polarized photoluminescence can be continuously tuned from-15% to 15% as a function of gate voltage, whereas in structurally non-centrosymmetric monolayer MoS2 the photoluminescence polarization is gate independent. The observations are well explained as resulting from the continuous variation of orbital magnetic moments between positive and negative values through symmetry control. © 2013 Macmillan Publishers Limited. All rights reserved.

Wang Z.,Anhui University of Science and Technology
Optics Communications | Year: 2010

Under the weak-probe approximation, we theoretically investigate the transient gain-absorption property of the probe field in a four-level asymmetric semiconductor quantum well system. We find that the strength of Fano interference and the energy splitting affect the transient gain-absorption property of the weak continuous-wave (CW) probe field or Gaussian-pulse probe field dramatically. The dependence of transient gain-absorption property of the probe field on the intensity and the frequency detuning of the strong coupling field is also given. Our study is much more practical than its atomic counterpart due to its flexible design and the controllable interference strength. Thus, it may provide some new possibilities for technological applications. © 2010 Elsevier B.V. All rights reserved.

Li X.,Shandong University | Xiong S.,Shandong University | Li J.,Shandong University | Bai J.,Shandong University | And 2 more authors.
Journal of Materials Chemistry | Year: 2012

Low-cost controlled strategies for the synthesis of mesoporous nickel oxide materials are highly desirable owing to its significant applications for power storage and other fields. In this contribution, we develop a novel hydrothermal route to synthesize α-Ni(OH) 2, in which urea has not only been utilized to produce hydroxyl anions, but also to organize ultrathin nanowires/nanosheets into a network-like hierarchical assemblage. The morphological evolution process of this organized product has been investigated by examining different reaction intermediates during the synthesis. The growth and thus final assemblage of α-Ni(OH) 2 can be finely tuned by selecting preparative parameters such as the molar ratio of starting chemicals. Based on the topotactic transformation from α-Ni(OH) 2, various mesoporous NiO hierarchical microspheres from ultrathin nanowires/nanosheets self-assembly have been prepared via thermal decomposition in an air atmosphere. The electrochemical performances of the typical nickel oxide products are evaluated. It is demonstrated that tuning of the surface texture and the pore size of the NiO products is very significant for electrochemical capacitor and water treatment applications. The mesoporous NiO network-like hierarchical microspheres exhibit excellent cyclic performance with nearly 100% capacity retention at a current density of 10 A g -1 in a testing range of 2000 cycles. Moreover, the mesoporous NiO network-like hierarchical microspheres have excellent ability to remove organic pollutants from wastewater by their wonderful surface adsorption ability. © 2012 The Royal Society of Chemistry.

Jiang R.,Chinese University of Hong Kong | Li B.,Anhui University of Science and Technology | Fang C.,Chinese University of Hong Kong | Wang J.,Chinese University of Hong Kong
Advanced Materials | Year: 2014

Hybrid nanostructures composed of semiconductor and plasmonic metal components are receiving extensive attention. They display extraordinary optical characteristics that are derived from the simultaneous existence and close conjunction of localized surface plasmon resonance and semiconduction, as well as the synergistic interactions between the two components. They have been widely studied for photocatalysis, plasmon-enhanced spectroscopy, biotechnology, and solar cells. In this review, the developments in the field of (plasmonic metal)/semiconductor hybrid nanostructures are comprehensively described. The preparation of the hybrid nanostructures is first presented according to the semiconductor type, as well as the nanostructure morphology. The plasmonic properties and the enabled applications of the hybrid nanostructures are then elucidated. Lastly, possible future research in this burgeoning field is discussed. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Zhao W.,Anhui University of Science and Technology | Li M.,The Interdisciplinary Center
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014

The B-mode polarization of the cosmic microwave background (CMB) radiation is an excellent information channel for the detection of relic gravitational waves. However, the detection is contaminated by the B-mode polarization generated by some other effects. In this paper, we discuss the contaminations caused by the cosmological birefringence, which converts the CMB E-mode to the B-mode, and forms the effective noise for the detection of gravitational waves. We find that this contamination is significant, if the rotation angle is large. However, this kind of B-mode can be properly de-rotated, and the effective noises can be greatly reduced. We find that, comparing with the contaminations caused by cosmic weak lensing, the residual polarization generated by the cosmological birefringence is negligible for the detection of relic gravitational waves in the CMB. © 2014 The Authors.

Chen D.,Nanjing Forestry University | Zhou J.,Nanjing Forestry University | Zhang Q.,Nanjing Forestry University | Zhu X.,Anhui University of Science and Technology
Renewable and Sustainable Energy Reviews | Year: 2014

Bio-oil is the liquid product of the fast pyrolysis of biomass. Recently, bio-oil has gained increasing attention for its direct use in combustion within boilers and furnaces as well as its use in automobiles and chemical materials after refining. Unfortunately, the composition of bio-oil is very complex. Aging occurs during storage, which leads to obvious changes in the physical and chemical properties of the oil. The poor storage stability of bio-oil restricts its extensive applications as a key renewable energy alternative. Viscosity and average molecular weight, as well as water and solid content can measured to determine changes in bio-oil. In this article, the testing parameters and technologies used for examining bio-oil stability and research progress in the field of bio-oil stability are reviewed. Emphasis is placed on thermal and oxidation stability. Scientific and technical developments towards improving bio-oil stability are also discussed. Furthermore, important aspects for consideration when developing experimental plans for bio-oil upgrades are examined. It also points out challenges to success with bio-oil upgrading in the future. © 2014 Elsevier Ltd.

Zhu C.,Georgia Institute of Technology | Zhu C.,Nanjing Southeast University | Peng H.-C.,Georgia Institute of Technology | Zeng J.,Anhui University of Science and Technology | And 3 more authors.
Journal of the American Chemical Society | Year: 2012

We describe a synthesis of Au wavy nanowires in an aqueous solution in the presence of cetyltrimethylammonium bromide (CTAB). The resultant Au nanowires automatically separated from the solution and floated at the air/water interface. We investigated the formation mechanism by characterizing the samples obtained at different stages of the synthesis. Both particle attachment and cold welding were found to be involved in the formation of such nanowires. Based on X-ray photoelectron spectroscopy and thermogravimetric analysis, the CTAB molecules adsorbed on the surface of a Au nanostructure went through a change in structure from a bilayer to a monolayer, converting the Au surface from hydrophilic to hydrophobic. As a result, the Au wavy nanowires were driven to the air/water interface during the synthesis. This growth mechanism is potentially extendable to many other systems involving small surfactant molecules. © 2012 American Chemical Society.

Ding G.-J.,Anhui University of Science and Technology | Zhou Y.-L.,CAS Institute of High Energy Physics
Nuclear Physics B | Year: 2013

We present a warped extra dimension model with the custodial symmetry SU(2)L×SU(2)R×U(1)X×PLR based on the flavor symmetry S4×Z2×Z2', and the neutrinos are taken to be Dirac particles. At leading order, the democratic lepton mixing is derived exactly, and the high-dimensional operators introduce corrections of order λc to all the three lepton mixing angles such that agreement with the experimental data can be achieved. The neutrino mass spectrum is predicted to be of the inverted hierarchy and the second octant of θ23 is preferred. We suggest the modified democratic mixing, which is obtained by permuting the second and the third rows of the democratic mixing matrix, should be a good first order approximation to understanding sizable θ13 and the first octant of θ23. The constraints on the model from the electroweak precision measurements are discussed. Furthermore, we investigate the lepton mixing patterns for all the possible residual symmetries Gν and Gl in the neutrino and charged lepton sectors, respectively. © 2013 Elsevier B.V.

Wang Y.,Xiamen University | Lin H.-X.,Xiamen University | Chen L.,Xiamen University | Ding S.-Y.,Xiamen University | And 7 more authors.
Chemical Society Reviews | Year: 2014

One important objective of molecular assembly research is to create highly complex functional chemical systems capable of responding, adapting, and evolving. Compared with living systems, the synthetic systems are still rather primitive and are far from realizing those features. Nature is by far the most important source of inspiration for designing and creating such systems. In this critical review, we summarize an alternative approach, inspired by catalysis, to examine and describe some molecular assembly processes. A new term, "catassembly," is suggested to refer to the increase in the rate and control of a molecular assembly process. This term combines the words "catalysis" and "assembly," and identifiably retains the Greek root "cat-" of catalysis. The corresponding verb is "catassemble" and the noun is "catassembler", referring to the "helper" species. Catassembly in molecular assembly is a concept that is analogous to catalysis in chemical synthesis. After using several examples to illustrate the characteristics of catassembly, we discuss future methodological and theoretical developments. We also emphasize the significance of the synergy between chemical synthesis and molecular assembly, especially for hierarchical assembly systems. Because most efforts in the field of molecular assembly have been devoted to the design and synthesis of molecular building blocks, we wish to stress the apparently missing yet critical link to complex chemical systems, i.e., the design and utilization of molecular catassemblers to facilitate the formation of functional molecular assemblies from building blocks with high efficiency and selectivity. This rational control and accelerated method will promote the systems chemistry approach, and may expand the spectrum of molecular assembly from basic science to applications. © 2014 The Royal Society of Chemistry.

Zheng Y.,Georgia Institute of Technology | Zeng J.,Anhui University of Science and Technology | Ruditskiy A.,Georgia Institute of Technology | Liu M.,Georgia Institute of Technology | Xia Y.,Georgia Institute of Technology
Chemistry of Materials | Year: 2014

Oxidative etching plays an important role in the synthesis of metal nanocrystals. This is because the zerovalent species, including atoms, clusters, and nanocrystallites, can all be oxidized back to the ionic form and thus altering the types and distributions of products formed in both the nucleation and growth steps. In the first part of this review, we discuss the critical components needed for oxidative etching, as well as methods for enabling or preventing oxidative etching in a synthesis. We then present and analyze a number of interesting experimental observations caused by oxidative etching. In the following sections, we highlight four major applications of oxidative etching in the synthesis of metal nanocrystals, with regards to experimental controls over the crystallinity, size, shape, morphology, and growth kinetics. © 2013 American Chemical Society.

Jin B.,Anhui University of Science and Technology | Huang M.-N.L.,National Sun Yat - sen University
Biometrika | Year: 2011

We propose a new method with minimum experimental run size using the properties of Hadamard matrices through which some φp-optimal exact designs including A-, D-and E-optimal designs are constructed for a linear log contrast model in mixture experiments. © 2011 Biometrika Trust.

Feng C.,Nanyang Technological University | Feng D.,Nanyang Technological University | Loh T.-P.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemical Communications | Year: 2014

Rh(iii)-catalyzed C-H olefinic alkynylation of enamides for the stereospecific construction of synthetically useful Z-type enynamides is reported. This protocol displays good functionality tolerance and operational simplicity thus providing an alternative synthetic opportunity for the ease of access to specific 1,3-enyne derivatives. © 2014 the Partner Organisations.

Li J.,Shandong University | Xiong S.,Shandong University | Li X.,Shandong University | Qian Y.,Shandong University | Qian Y.,Anhui University of Science and Technology
Journal of Materials Chemistry | Year: 2012

Transition metal oxides are important functional materials that have gained enormous research interest in recent years. In this work, porous cubic manganese cobalt spinel Mn 1.5Co 1.5O 4 core-shell microspheres were first prepared via a urea-assisted solvothermal route followed by pyrolysis of the carbonate precursor. The microsphere is composed of the shell of 400 nm thickness and the core with a 2.5 μm diameter. Nitrogen sorption isotherms show that this structure possesses a high surface area of 27.0 m 2 g -1 with an average pore diameter of 30 nm. Compared with a simple spherical nanopowder, such a core-shell like porous structure is expected to improve the electrochemical performance, due to its higher resistance against separation or isolation during the electrochemical reaction. The as-prepared Mn 1.5Co 1.5O 4 core-shell microspheres show an excellent cyclic performance at high current density with more than 90% capacity retention in a testing range of 300 cycles when used as an anode material for lithium ion batteries (LIBs), which can be attributed to the appropriate pore size and unique core-shell structures. Therefore, the Mn 1.5Co 1.5O 4 core-shell microspheres prepared by the present synthetic route could be identified as a potential anode candidate for the near future development of LIBs. © 2012 The Royal Society of Chemistry.

Jiang P.,Tsinghua University | Du W.,University of Pennsylvania | Wu M.,Anhui University of Science and Technology
Protein and Cell | Year: 2014

Energy metabolism is significantly reprogrammed in many human cancers, and these alterations confer many advantages to cancer cells, including the promotion of biosynthesis, ATP generation, detoxification and support of rapid proliferation. The pentose phosphate pathway (PPP) is a major pathway for glucose catabolism. The PPP directs glucose flux to its oxidative branch and produces a reduced form of nicotinamide adenine dinucleotide phosphate (NADPH), an essential reductant in anabolic processes. It has become clear that the PPP plays a critical role in regulating cancer cell growth by supplying cells with not only ribose-5-phosphate but also NADPH for detoxification of intracellular reactive oxygen species, reductive biosynthesis and ribose biogenesis. Thus, alteration of the PPP contributes directly to cell proliferation, survival and senescence. Furthermore, recent studies have shown that the PPP is regulated oncogenically and/or metabolically by numerous factors, including tumor suppressors, oncoproteins and intracellular metabolites. Dysregulation of PPP flux dramatically impacts cancer growth and survival. Therefore, a better understanding of how the PPP is reprogrammed and the mechanism underlying the balance between glycolysis and PPP flux in cancer will be valuable in developing therapeutic strategies targeting this pathway. © 2014 The Author(s).

He Q.,Anhui University of Science and Technology
Journal of Sound and Vibration | Year: 2013

This paper proposes a new study to explore the wavelet packet energy (WPE) flow characteristics of vibration signals by using the manifold learning technique. This study intends to discover the nonlinear manifold information from the WPE flow map of vibration signals to characterize and discriminate different classes. A new feature, called WPE manifold feature, is achieved by three main steps: first, the wavelet packet transform (WPT) is conducted to decompose multi-class signals into a library of time-frequency subspaces; second, the WPE is calculated in each subspace to produce a feature vector for each signal; and finally, low-dimensional manifold features carrying class information are extracted from the WPE library for either training or testing samples by using the manifold learning algorithm. The new feature reveals the nonlinear WPE flow structure among various redundant time-frequency subspaces. It combines the benefits of time-frequency characteristics and nonlinear information, and hence exhibits valuable properties for vibration signal classification. The effectiveness and the merits of the proposed method are confirmed by case studies on vibration analysis-based machine fault classification. © 2012 Elsevier Ltd.

Ge H.,Chinese University of Hong Kong | Wu C.,Chinese University of Hong Kong | Wu C.,Anhui University of Science and Technology
Macromolecules | Year: 2010

A study was conducted to demonstrate the separation of linear and star chains by a nanopore. It was demonstrated that it was practically possible to separate linear and star chains by flushing a mixture of them through a nanopore with a properly chosen flow rate. Polystyrene (PS) linear and star chains were synthesized with different lengths by using divinylbenzene to couple living polystyl linear chains in solution. The prepared star chains were fractionated into a series of narrowly distribution star chains with different numbers of arms. modified commercial LLS spectrometer equipped with a multi-τ digital time correlator and a cylindrical 22 mW UNIPHASE He-Ne laser was used to characterize each solution before and after it passed through the nanopores. The incident beam was vertically polarized with respect to the scattering plane.

Ding G.-J.,Anhui University of Science and Technology | Morisi S.,Institute Fisica Corpuscular Csic | Morisi S.,University of Wurzburg | Valle J.W.F.,Institute Fisica Corpuscular Csic
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

We explore two bilarge neutrino mixing Anzätze within the context of Abelian flavor symmetry theories: (BL1) sinâ¡θ 12∼λ, sinâ¡θ13∼λ, sinâ¡θ23∼λ, and (BL2) sinâ¡θ12∼λ, sinâ¡θ 13∼λ, sinâ¡θ23∼1- λ. The first pattern is proposed by two of us and is favored if the atmospheric mixing angle θ23 lies in the first octant, while the second one is preferred for the second octant of θ23. In order to reproduce the second texture, we find that the flavor symmetry should be U(1)×Zm, while for the first pattern the flavor symmetry should be extended to U(1)×Zm×Zn with m and n of different parity. Explicit models for both mixing patterns are constructed based on the flavor symmetries U(1)×Z3×Z4 and U(1)×Z2. The models are extended to the quark sector within the framework of SU(5) grand unified theory in order to give a successful description of quark and lepton masses and mixing simultaneously. Phenomenological implications are discussed. © 2013 American Physical Society.

Jorn R.,Northwestern University | Zhao J.,Anhui University of Science and Technology | Petek H.,University of Pittsburgh | Seideman T.,Northwestern University
ACS Nano | Year: 2011

We introduce a new paradigm for single molecule devices based on electronic actuation of the internal atom/cluster motion within a fullerene cage. By combining electronic structure calculations with dynamical simulations, we explore current-triggered dynamics in endohedrally doped fullerene molecular junctions. Inelastic electron tunneling through a Li atom localized resonance in the Au-Li@C60-Au junction initiates fascinating, strongly coupled 2D dynamics, wherein the Li atom exhibits large amplitude oscillation with respect to the fullerene wall and the fullerene cage bounces between the gold electrodes, slightly perturbed by the embedded atom motion. Implications to the fields of single molecule electronics and nanoelectromechanical systems are discussed. © 2011 American Chemical Society.

Freed K.F.,James Franck Institute | Wu C.,Chinese University of Hong Kong | Wu C.,Anhui University of Science and Technology
Macromolecules | Year: 2011

Using recently developed analytical Green's function/numerical inverse Laplace transform methods, we calculate the hydrodynamic drag and confinement forces on a linear Gaussian chain inside an interacting and impenetrable cylindrical tube in the free draining limit. Equating the two forces leads to an estimation of the critical (minimum) flow rate (q c) to drag the chain through the tube. The estimated q c is compared with our measured q c in theta solutions as well as with our previous scaling argument for a variety of experimental conditions (solvent quality and tube radius, R). Satisfactory agreement between the calculated and observed critical flow rates reveals that the previous description by de Gennes of a linear chain confined in a tube as a series of hard spheres (blobs) significantly underestimates the hydrodynamic drag force, such that the predicted q c for the hard sphere model is 10 2-10 3 times higher than observed. The calculations also confirm our previous scaling argument that q c decreases with increasing R, thus departing from the hard-sphere blob prediction that q c is independent of R. More importantly, the calculation describes how interactions with the tube walls affect chain confinement. © 2011 American Chemical Society.

Song H.,CAS Beijing National Laboratory for Molecular | Niu Y.,CAS Beijing National Laboratory for Molecular | Wang Z.,Anhui University of Science and Technology | Zhang J.,CAS Beijing National Laboratory for Molecular
Biomacromolecules | Year: 2011

Liquid crystalline (LC) phase transition and gel-sol transition in the solutions of microcrystalline cellulose (MCC) and ionic liquid (1-ethyl-3-methylimidazolium acetate, EMIMAc) have been investigated through a combination of polarized optical microscope (POM) observation and rheological measurements. Molecular LC phase forms at the 10 wt % cellulose concentration, as observed by POM, whereas the critical gel point is 12.5 wt % by rheological measurements according to the Winter and Chambon theory, for which the loss tangent, tan, shows frequency independence. Dramatic decreases of G' and G'' in the phase transition temperature range during temperature sweep are observed due to disassembling of the LC domain junctions. The phase diagram describing the LC phase and gel-sol transitions is obtained and the associated mechanisms are elucidated. A significant feature shown in the phase diagram is the presence of a narrow lyotropic LC solution region, which potentially has a great importance for the cellulose fiber wet spinning. © 2011 American Chemical Society.

Lu X.,Anhui University of Science and Technology
Nature Photonics | Year: 2015

Two-dimensional van der Waals materials have opened a new paradigm for fundamental physics exploration and device applications because of their emerging physical properties. Unlike gapless graphene, monolayer transition-metal dichalcogenides (TMDCs) are two-dimensional semiconductors that undergo an indirect-to-direct bandgap transition, creating new optical functionalities for next-generation ultra-compact photonics and optoelectronics. Although the enhancement of spontaneous emission has been reported on TMDC monolayers integrated with photonic crystals and distributed Bragg reflector microcavities, coherent light emission from a TMDC monolayer has not been demonstrated. Here, we report the realization of a two-dimensional excitonic laser by embedding monolayer WS2 in a microdisk resonator. Using a whispering gallery mode with a high quality factor and optical confinement, we observe bright excitonic lasing at visible wavelengths. This demonstration of a two-dimensional excitonic laser marks a major step towards two-dimensional on-chip optoelectronics for high-performance optical communication and computing applications. © 2015 Nature Publishing Group

Zhu Z.,Anhui University of Science and Technology
Journal of Optical Communications and Networking | Year: 2012

We propose energy-saving algorithms to improve the energy efficiency of hybrid fiber coaxial (HFC) networks that support DOCSIS (Data Over Cable Service Interface Specification) 3.0 standard. The algorithms incorporate a traffic-aware approach and modify the operation statuses of the two primary network elements, the cable modem (CM) and the cable modem termination system (CMTS), dynamically. For the CM-side operation, we first propose a basic algorithm that can optimize the CMs' energy efficiency, regardless of significant increase of the packet delay and the number of operation changes (NoOC). We then propose two modified approaches to reduce the packet delay and NoOC while saving energy. Simulations with these algorithms show 37.5%-42.2% energy saving on the CM side, compared to the traditional case where the CMs' operation statuses are static. Next, we propose a CMTS-side energy-saving algorithm to find the actual connection mapping between the CM channels and CMTS ports. The proposed algorithm tries to support CM connections with minimal numbers of CMTS ports. To further improve the energy efficiency of the CMTS, we design a readjustment approach that can reorganize CM connections on CMTS ports based on their loads. Simulation results show that 31.08%-32.61% energy saving can be achieved on the CMTS in total. Hence, the proposed algorithms achieve effective energy saving on both the CM and CMTS sides. © 2009-2012 OSA.

Wei R.,Anhui University of Science and Technology | Wei R.,Cornell University | Mueller E.J.,Cornell University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2013

We calculate the magnetic-field dependence of Rabi rates for two-photon optical Raman processes in alkali-metal atoms. Due to a decoupling of the nuclear and electronic spins, these rates fall with increasing field. At the typical magnetic fields of alkali-metal-atom Feshbach resonances (B∼200-1200 G), the Raman rates have the same order of magnitude as their zero-field values, suggesting one can combine Raman-induced gauge fields or spin-orbital coupling with strong Feshbach-induced interactions. The exception is 6Li, where there is a factor-of-7 suppression in the Raman coupling, compared to its already small zero-field value. © 2013 American Physical Society.

Giunti C.,National Institute of Nuclear Physics, Italy | Laveder M.,University of Padua | Li Y.F.,CAS Institute of High Energy Physics | Long H.W.,Anhui University of Science and Technology
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

We present the results of global analyses of short-baseline neutrino oscillation data in 3+1, 3+2 and 3+1+1 neutrino mixing schemes. We show that the data do not allow us to abandon the simplest 3+1 scheme in favor of the more complex 3+2 and 3+1+1 schemes. We present the allowed region in the 3+1 parameter space, which is located at Δm412 between 0.82 and 2.19 eV2 at 3σ. The case of no oscillations is disfavored by about 6σ, which decreases dramatically to about 2σ if the Liquid Scintillating Neutrino Detector (LSND) data are not considered. Hence, new high-precision experiments are needed to check the LSND signal. © 2013 American Physical Society.

Jiang Y.,Nanyang Technological University | Loh T.-P.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemical Science | Year: 2014

This paper describes an efficient method to β-keto methyl sulfones and (E)-vinyl methyl sulfones using DMSO as the substrate. The methyl sulfonyl radical generated from DMSO in the presence of catalytic Cu(i) under O2 atmosphere is believed to be involved in this reaction. Isotopic labeling and 18O2 experiments were performed to investigate the reaction mechanism. © the Partner Organisations 2014.

Chen Z.,University of California at Irvine | Chen Z.,Anhui University of Science and Technology | Yu C.C.,University of California at Irvine
Physical Review Letters | Year: 2010

Recent experiments implicate spins on the surface of metals as the source of flux and inductance noise in SQUIDs. We present Monte Carlo simulations of 2D and 3D Ising spin glasses that produce magnetization noise SM consistent with flux noise. At low frequencies SM is a maximum at the critical temperature TC in three dimensions, implying that flux noise should be a maximum at TC. The second spectra of the magnetization noise and the noise in the susceptibility are consistent with experimentally measured SQUID inductance noise. © 2010 The American Physical Society.

Chen H.,University of Tennessee at Knoxville | Chen H.,Oak Ridge National Laboratory | Zhu W.,University of Tennessee at Knoxville | Zhu W.,Oak Ridge National Laboratory | And 3 more authors.
Physical Review Letters | Year: 2010

Using first-principles calculations within density functional theory, we study the energetics and kinetics of C nucleation in the early stages of epitaxial graphene growth on three representative stepped metal surfaces: Ir(111), Ru(0001), and Cu(111). We find that on the flat surfaces of Ir(111) and Ru(0001), two C atoms repel each other, while they prefer to form a dimer on Cu(111). Moreover, the step edges on Ir and Ru surfaces cannot serve as effective trapping centers for single C adatoms, but can readily facilitate the formation of C dimers. These contrasting behaviors are attributed to the delicate competition between C-C bonding and C-metal bonding, and a simple generic principle is proposed to predict the nucleation sites of C adatoms on many other metal substrates with the C-metal bond strengths as the minimal inputs. © 2010 The American Physical Society.

He L.H.,Anhui University of Science and Technology
Journal of the Mechanics and Physics of Solids | Year: 2013

Intermolecular interaction within one and between two incompressible, soft elastic bodies is studied at a continuous level. We show that the macroscopic effect of the interaction can be characterized by a deformation-dependent Maxwell stress. The divergence of the Maxwell stress gives the body force, while the inner product of it with the outward normal of a body generates the surface traction. Accordingly, we can replace the contribution of intermolecular forces to the deformation and stress in the body by that of either the body force or the surface traction. Both approaches are proved to be equivalent, in the sense that the resulting displacements are the same and the stresses are linked by an exact correspondence relation. If the deformation induced by the interaction is small, the equations are simplified up to the first order of the displacement gradient. Two examples are given as well to illustrate some features of local stress distribution in a body caused by self and other-body interactions. © 2013 Elsevier Ltd.

Yuan C.,Nanyang Technological University | Wu H.B.,Nanyang Technological University | Xie Y.,Anhui University of Science and Technology | Lou X.W.,Nanyang Technological University
Angewandte Chemie - International Edition | Year: 2014

A promising family of mixed transition-metal oxides (MTMOs) (designated as AxB3-xO4; A, B=Co, Ni, Zn, Mn, Fe, etc.) with stoichiometric or even non-stoichiometric compositions, typically in a spinel structure, has recently attracted increasing research interest worldwide. Benefiting from their remarkable electrochemical properties, these MTMOs will play significant roles for low-cost and environmentally friendly energy storage/conversion technologies. In this Review, we summarize recent research advances in the rational design and efficient synthesis of MTMOs with controlled shapes, sizes, compositions, and micro-/nanostructures, along with their applications as electrode materials for lithium-ion batteries and electrochemical capacitors, and efficient electrocatalysts for the oxygen reduction reaction in metal-air batteries and fuel cells. Some future trends and prospects to further develop advanced MTMOs for next-generation electrochemical energy storage/conversion systems are also presented. Full of energy: Recent advances in the rational design and synthesis of mixed transition-metal oxides (MTMOs, designated as AxB3-xO4) with controllable compositions and structures and their applications in various electrochemical energy storage/conversion technologies are summarized and discussed (see picture). Future trends and prospects for their further development are also discussed. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Chen L.P.,Anhui University of Science and Technology
Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology | Year: 2012

To construct a novel Ag85B DNA vaccine based on the genetic adjuvant of T-bet known as Th1 transcription factor and to research the immunoregulation function of the DNA complex vaccine. Ag85B gene and T-bet gene were amplified by RT-PCR, and cloned into pcDNA3.1 plasmid to construct recombinant plasmids pcDNA3-Ag85B and pcDNA3-T-bet, respectively. The recombinant plasmids were transfected into RAW264.7 cells using Lipofectamine(TM); 2000 reagent to detect the expressions of Ag85B and T-bet proteins by Western blotting. BALB/c mice were immunized by three intramuscular inoculations with pcDNA3.1-FLAG-T-bet in combination with pcDNA3.1-FLAG-Ag85B. Two weeks after the last immunization, the anti-Ag85B antibody titres in sera were tested by ELISA. Meanwhile, spleen lymphocyte suspension was cultured in the context of Ag85B, and then the secretion of cytokines in the culture fluid was tested by ELISA. Plasmid proteins were successfully expressed in a dose-dependent manner. Additionally, T-bet/Ag85B complex not only induced obviously higher IgG2a titre with the lower IgG1, but also stimulated the increased secretion of IFN-γ and IL-2 with the concomitant repression of IL-4 and IL-10. T-bet can enhance Ag85B-specific IgG2a antibody response and convert T cell subsets to a Th1-predominant immune response.

Gao S.,University of Kansas | Gao S.,Anhui University of Science and Technology | Hui R.,University of Kansas
Optics Letters | Year: 2012

A frequency-modulated continuous-wave (FMCW) lidar is demonstrated with heterodyne detection. The lidar transmitter utilizes an electro-optic I/Q modulator for the first time to generate carrier-suppressed and frequency-shifted FM modulation. This eliminates the need for an acousto-optic frequency shifter commonly used in heterodyne lidar transmitters. It also allows the use of a much wider modulation bandwidth to improve the range resolution. The capability of complex optical field modulation of the I/Q modulator provides an additional degree of freedom compared with an intensity modulator, which will benefit future lidar applications. © 2012 Optical Society of America.

Wang Z.,Anhui University of Science and Technology
Optics Communications | Year: 2010

We investigated the optical bistability in an Er3+-doped yttrium-aluminum-garnet (YAG) crystal inside a unidirectional ring cavity. We find that the intensity and the frequency detuning of the coherent field as well as the rate of incoherent field can affect the optical bistability dramatically, which can be used to manipulate efficiently the threshold intensity and the hysteresis loop. The effect of the cooperation parameter on the OB is also studied. © 2010 Elsevier B.V. All rights reserved.

Tian F.-B.,Vanderbilt University | Luo H.,Vanderbilt University | Song J.,Vanderbilt University | Lu X.-Y.,Anhui University of Science and Technology
Journal of Fluids and Structures | Year: 2013

Insect wings usually are flexible and deform significantly under the combined inertial and aerodynamic load. To study the effect of wing flexibility on both lift and thrust production in forward flight, a two-dimensional numerical simulation is employed to compute the fluid-structure interaction of an elastic wing section translating in an inclined stroke plane while pitching around its leading ledge. The effects of the wing stiffness, mass ratio, stroke plane angle, and flight speed are considered. The results show that the passive pitching due to wing deformation can significantly increase thrust while either maintaining lift at the same level or increasing it simultaneously. Another important finding is that even though the wing structure and actuation kinematics are symmetric, chordwise deformation of the wing shows a larger magnitude during upstroke than during downstroke. The asymmetry is more pronounced when the wing has a low mass ratio so that the fluid-induced deformation is significant. Such an aerodynamic cause may serve as an additional mechanism for the asymmetric deformation pattern observed in real insects. © 2012 Elsevier Ltd.

Zhang H.,Zhejiang University | Jin M.,Xian University of Science and Technology | Xiong Y.,Anhui University of Science and Technology | Lim B.,Sungkyunkwan University | Xia Y.,Georgia Institute of Technology
Accounts of Chemical Research | Year: 2013

Palladium is a marvelous catalyst for a rich variety of reactions in industrial processes and commercial devices. Most Pd-catalyzed reactions exhibit structure sensitivity, meaning that the activity or selectivity depends on the arrangement of atoms on the surface. Previously, such reactions could only be studied in ultrahigh vacuum using Pd single crystals cut with a specific crystallographic plane. However, these model catalysts are far different from real catalytic systems owing to the absence of atoms at corners and edges and the extremely small specific surface areas for the model systems. Indeed, enhancing the performance of a Pd-based catalyst, in part to reduce the amount needed of this precious and rare metal for a given reaction, requires the use of Pd with the highest possible specific surface area. Recent advances in nanocrystal synthesis are offering a great opportunity to investigate and quantify the structural sensitivity of catalysts based on Pd and other metals. For a structure-sensitive reaction, the catalytic properties of Pd nanocrystals are strongly dependent on both the size and shape. The shape plays a more significant role in controlling activity and selectivity, because the shape controls not only the facets but also the proportions of surface atoms at corners, edges, and planes, which affect the outcomes of possible reactions. We expect catalysts based on Pd nanocrystals with optimized shapes to meet the increasing demands of industrial applications at reduced loadings and costs.In this Account, we discuss recent advances in the synthesis of Pd nanocrystals with controlled shapes and their resulting performance as catalysts for a large number of reactions. First, we review various synthetic strategies based on oxidative etching, surface capping, and kinetic control that have been used to direct the shapes of nanocrystals. When crystal growth is under thermodynamic control, the capping agent plays a pivotal role in determining the shape of a product by altering the order of surface energies for different facets through selective adsorption; the resulting product has the lowest possible total surface energy. In contrast, the product of a kinetically controlled synthesis often deviates from the thermodynamically favored structure, with notable examples including nanocrystals enclosed by high-index facets or concave surfaces.We then discuss the key parameters that control the nucleation and growth of Pd nanocrystals to decipher potential growth mechanisms and build a connection between the experimental conditions and the pathways to different shapes. Finally, we present a number of examples to highlight the use of these Pd nanocrystals as catalysts or electrocatalysts for various applications with structure-sensitive properties. We believe that a deep understanding of the shape-dependent catalytic properties, together with an ability to experimentally maneuver the shape of metal nanocrystals, will eventually lead to rational design of advanced catalysts with substantially enhanced performance. © 2012 American Chemical Society.

Da B.,Japan National Institute of Materials Science | Shinotsuka H.,Japan National Institute of Materials Science | Yoshikawa H.,Japan National Institute of Materials Science | Ding Z.J.,Anhui University of Science and Technology | Tanuma S.,Japan National Institute of Materials Science
Physical Review Letters | Year: 2014

We propose an improved method for calculating electron inelastic mean free paths (IMFPs) in solids from experimental energy-loss functions based on the Mermin dielectric function. The "extended Mermin" method employs a nonlimited number of Mermin oscillators and allows negative oscillators to take into account not only electronic transitions, as is common in the traditional approaches, but also infrared transitions and inner shell electron excitations. The use of only Mermin oscillators naturally preserves two important sum rules when extending to infinite momentum transfer. Excellent agreement is found between calculated IMFPs for Cu and experimental measurements from elastic peak electron spectroscopy. Notably improved fits to the IMFPs derived from analyses of x-ray absorption fine structure measurements for Cu and Mo illustrate the importance of the contribution of infrared transitions in IMFP calculations at low energies. © 2014 American Physical Society.

Wu Y.,CAS Hefei Institutes of Physical Science | Wu Y.,Anhui University of Science and Technology
Fusion Engineering and Design | Year: 2011

China focuses on the development of the liquid LiPb blanket due to its attractive performances. A series of LiPb breeder blanket concepts were proposed for different applications of fusion in China. This paper gives an overview of the LiPb breeder blanket concepts and relevant R&D progress in China. © 2011 Published by Elsevier B.V.

Wang S.,Anhui University of Science and Technology | Wang S.,CAS Institute of Theoretical Physics
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2010

Since the energy momentum tensor of a magnetic field always contains a spin-2 component in its anisotropic stress, stochastic primordial magnetic field (PMF) in the early universe must generate stochastic gravitational-wave (GW) background. This process will greatly affect the relic gravitational wave (RGW), which is one of the major scientific goals of the laser interferometer GW detections. Recently, the fifth science (S5) run of laser interferometer gravitational-wave observatory (LIGO) gave a latest upper limit ΩGW<6.9×10-6 on the RGW background. Utilizing this upper limit, we derive new PMF limits: for a scale of galactic cluster λ=1Mpc, the amplitude of PMF, that produced by the electroweak phase transition, has to be weaker than Bλ≤4×10-7 G; for a scale of supercluster λ=100Mpc, the amplitude of PMF has to be weaker than Bλ≤9×10-11 G. In this manner, GW observation has potential to make interesting contributions to the study of primordial magnetic field. © 2010 The American Physical Society.

Culcer D.,Anhui University of Science and Technology | Culcer D.,University of New South Wales | Zimmerman N.M.,U.S. National Institute of Standards and Technology
Applied Physics Letters | Year: 2013

We study the effect of charge and spin noise on singlet-triplet qubits in Si quantum dots. We set up a theoretical framework aimed at enabling experiment to efficiently identify the most deleterious defects, and complement it with the knowledge of defects gained in decades of industrial and academic work. We relate the dephasing rates Γ φ due to various classes of defects to experimentally measurable parameters, such as charge dipole moment, spin dipole moment, and fluctuator switching times. We find that charge fluctuators are more efficient in causing dephasing than spin fluctuators. © 2013 AIP Publishing LLC.

Shi Z.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology | Loh T.-P.,Nanyang Technological University
Angewandte Chemie - International Edition | Year: 2013

Amines by all means: A unique aza-Rauhut-Currier/cyclization/desulfonation cascade reaction between allenoates and N-sulfonyl-1-aza-1,3-dienes, catalyzed by the readily available diamine TMEDA, has been developed. This strategy provides facile access to a broad range of valuable highly functionalized pyridines in good yields under very mild reaction conditions. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Cheng L.,Anhui University | Yuan Y.,Anhui University | Zhang X.,Anhui University | Yang J.,Anhui University of Science and Technology
Angewandte Chemie - International Edition | Year: 2013

The next super model: The Au84+ core of [Au 20(SR)16] can be viewed as two non-conjugate 4-center-2-electron (4c-2e) tetrahedral Au4 superatoms. The four valence electrons are delocalized in each Au4 unit as 4c-2e σ-bonds. Chemical bonding analysis confirms that a 2e-superatom network exists in [Au20(SR)16] (see picture: Au-yellow, SR-purple, superatoms-tetrahedra/red), this model explains the properties of this species. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Xu Y.,Anhui University of Science and Technology | Shu C.-W.,Brown University
Communications in Computational Physics | Year: 2010

Discontinuous Galerkin (DG) methods are a class of finite element methods using discontinuous basis functions, which are usually chosen as piecewise polynomials. Since the basis functions can be discontinuous, these methods have the flexibility which is not shared by typical finite element methods, such as the allowance of arbitrary triangulation with hanging nodes, less restriction in changing the polynomial degrees in each element independent of that in the neighbors (p adaptivity), and local data structure and the resulting high parallel efficiency. In this paper,we give a general review of the local DG (LDG) methods for solving high-order time-dependent partial differential equations (PDEs). The important ingredient of the design of LDG schemes, namely the adequate choice of numerical fluxes, is highlighted. Some of the applications of the LDG methods for high-order time-dependent PDEs are also be discussed. © 2010 Global-Science Press.

Gao J.-H.,Anhui University of Science and Technology | Xiao B.-W.,Lawrence Berkeley National Laboratory
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2010

We study the nonforward Compton scattering, in particular, the deeply virtual Compton scattering from AdS/CFT. We first calculate the contributions from the s-channel and u-channel supergravity diagrams as well as the four-point interaction diagram which correspond to the Compton scatterings on a dilaton target in CFT. Furthermore, we study the Compton scattering on a dilatino target. Assuming that protons can be identified as supergravity modes of the dilatino, we compare the calculated deeply virtual Compton scattering cross section to the low-energy experimental data from the H1 and ZEUS collaborations and find good agreement. We also discuss the t-channel graviton exchange contribution and show that it should be dominant in the high-energy limit. © 2010 The American Physical Society.

Li M.-B.,CAS Hefei Institutes of Physical Science | Tian S.-K.,Anhui University of Science and Technology | Wu Z.,CAS Hefei Institutes of Physical Science
Nanoscale | Year: 2014

An active, recoverable, and recyclable nanocluster catalyst, Au 25(SR)18 -, has been developed to catalyze the formation of α,β-unsaturated ketones or aldehydes from propargylic acetates. The catalytic process has been proposed to be initialized by an S N2′ addition of OH-. Moreover, a dramatic solvent effect was observed, for which a rational explanation was provided. © 2014 the Partner Organisations.

Qian S.,University of Electronic Science and Technology of China | Sheng Y.,Anhui University of Science and Technology
Annals of Biomedical Engineering | Year: 2011

Photogrammetry has become an effective method for the determination of electroencephalography (EEG) electrode positions in three dimensions (3D). Capturing multi-angle images of the electrodes on the head is a fundamental objective in the design of photogrammetry system for EEG localization. Methods in previous studies are all based on the use of either a rotating camera or multiple cameras, which are time-consuming or not cost-effective. This study aims to present a novel photogrammetry system that can realize simultaneous acquisition of multi-angle head images in a single camera position. Aligning two planar mirrors with the angle of 51.4°, seven views of the head with 25 electrodes are captured simultaneously by the digital camera placed in front of them. A complete set of algorithms for electrode recognition, matching, and 3D reconstruction is developed. It is found that the elapsed time of the whole localization procedure is about 3 min, and camera calibration computation takes about 1 min, after the measurement of calibration points. The positioning accuracy with the maximum error of 1.19 mm is acceptable. Experimental results demonstrate that the proposed system provides a fast and cost-effective method for the EEG positioning. © 2011 Biomedical Engineering Society.

Yu S.,National University of Singapore | Yu S.,Anhui University of Science and Technology | Oh C.H.,National University of Singapore
Physical Review Letters | Year: 2012

Quantum contextuality, as proved by Kochen and Specker, and also by Bell, should manifest itself in any state in any system with more than two distinguishable states and recently has been experimentally verified. However, for the simplest system capable of exhibiting contextuality, a qutrit, the quantum contextuality is verified only state dependently in experiment because too many (at least 31) observables are involved in all the known state-independent tests. Here we report an experimentally testable inequality involving only 13 observables that is satisfied by all noncontextual realistic models while being violated by all qutrit states. Thus our inequality facilitates a state-independent test of the quantum contextuality for an indivisible quantum system. We also provide a record-breaking state-independent proof of the Kochen-Specker theorem with 13 directions determined by 26 points on the surface of a magic cube. © 2012 American Physical Society.

Wei R.,Anhui University of Science and Technology | Wei R.,Cornell University | Mueller E.J.,Cornell University
Physical Review Letters | Year: 2012

We study the vortex structures of a (pseudo)spin-1/2 Fermi gas experiencing a uniform effective magnetic field in an anisotropic trap that interpolates between quasi-one dimensional (1D) and quasi-two dimensional (2D). At a fixed chemical potential, reducing the anisotropy (or equivalently increasing the attractive interactions or increasing the magnetic field) leads to instabilities towards pair density waves and vortex lattices. Reducing the chemical potential stabilizes the system. We calculate the phase diagram and explore the density and pair density. The structures are similar to those predicted for superfluid Bose gases. We further calculate the paired fraction, showing how it depends on the chemical potential and anisotropy. © 2012 American Physical Society.

Culcer D.,Anhui University of Science and Technology | Saraiva A.L.,Federal University of Rio de Janeiro | Koiller B.,Federal University of Rio de Janeiro | Hu X.,State University of New York at Buffalo | Das Sarma S.,University of Maryland University College
Physical Review Letters | Year: 2012

We devise a platform for noise-resistant quantum computing using the valley degree of freedom of Si quantum dots. The qubit is encoded in two polarized (1,1) spin-triplet states with different valley compositions in a double quantum dot, with a Zeeman field enabling unambiguous initialization. A top gate gives a difference in the valley splitting between the dots, allowing controllable interdot tunneling between opposite valley eigenstates, which enables one-qubit rotations. Two-qubit operations rely on a stripline resonator, and readout on charge sensing. Sensitivity to charge and spin fluctuations is determined by intervalley processes and is greatly reduced as compared to conventional spin and charge qubits. We describe a valley echo for further noise suppression. © 2012 American Physical Society.

Yu G.,Zhejiang University | Han C.,Zhejiang University | Zhang Z.,Zhejiang University | Chen J.,Zhejiang University | And 4 more authors.
Journal of the American Chemical Society | Year: 2012

The trans form of an azobenzene-containing guest can complex with a pillar[6]arene, while it cannot complex with pillar[5]arenes due to the different cavity sizes of the pillar[6]arene and the pillar[5]arenes. The spontaneous aggregation of its host-guest complex with the pillar[6]arene can be reversibly photocontrolled by irradiation with UV and visible light, leading to a switch between irregular aggregates and vesicle-like aggregates. This new pillar[6]arene-based photoresponsive host-guest recognition motif can work in organic solvents and is a good supplement to the existing widely used cyclodextrin/azobenzene recognition motif. © 2012 American Chemical Society.

Gao J.-H.,Anhui University of Science and Technology | Mou Z.-G.,Shandong University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2010

We investigate deep inelastic scattering off the polarized "neutron" using gauge/string duality. The "neutron" corresponds to a supergravity mode of the neutral dilatino. Through introducing the Pauli interaction term into the action in AdS5 space, we calculate the polarized deep inelastic structure functions of the "neutron" in supergravity approximation at large t' Hooft coupling λ and finite x with λ-1/2x<1. In comparison with the charged dilatino-"proton," which has been obtained in the previous work by Gao and Xiao, we find the structure functions of the "neutron" are power suppressed at the same order as the ones of the "proton." Especially, we find the Burkhardt-Cottingham-like sum rule, which is satisfied in the work by Gao and Xiao, is broken due to the Pauli interaction term. We also illustrate how such a Pauli interaction term can arise naturally from higher dimensional fermion-graviton coupling through the usual Kaluza-Klein reduction. © 2010 The American Physical Society.

Qin S.,Florida State University | Cai L.,Anhui University of Science and Technology | Zhou H.-X.,Florida State University
Physical Biology | Year: 2012

In cellular environments, two protein molecules on their way to form a specific complex encounter many bystander macromolecules. The latter molecules, or crowders, affect both the energetics of the interaction between the test molecules and the dynamics of their relative motion. In earlier work (Zhou and Szabo 1991 J. Chem. Phys. 95 5948-52), it has been shown that, in modeling the association kinetics of the test molecules, the presence of crowders can be accounted for by their energetic and dynamic effects. The recent development of the transient-complex theory for protein association in dilute solutions makes it possible to easily incorporate the energetic and dynamic effects of crowders. The transient complex refers to a late on-pathway intermediate, in which the two protein molecules have near-native relative separation and orientation, but have yet to form the many short-range specific interactions of the native complex. The transient-complex theory predicts the association rate constant as ka = ka0exp(- ΔG*el/k BT), where ka0 is the 'basal' rate constant for reaching the transient complex by unbiased diffusion, and the Boltzmann factors captures the influence of long-range electrostatic interactions between the protein molecules. Crowders slow down the diffusion, therefore reducing the basal rate constant (to kac0), and induce an effective interaction energy ΔGc. We show that the latter interaction energy for atomistic proteins in the presence of spherical crowders is 'long'-ranged, allowing the association rate constant under crowding to be computed as kac = kac0exp[ - (ΔG*el + ΔG* c)/kBT]. Applications demonstrate that this computational method allows for realistic modeling of protein association kinetics under crowding. © 2012 IOP Publishing Ltd.

Yi W.,Anhui University of Science and Technology | Zhang W.,Renmin University of China
Physical Review Letters | Year: 2012

We show that spin-orbit coupling (SOC) gives rise to pairing instability in a highly polarized two-dimensional Fermi gas for an arbitrary interaction strength. The pairing instability can lead to a Fulde-Ferrell-Larkin- Ovchinnikov-like molecular state, which undergoes a first-order transition into a pairing state with zero center-of-mass momentum as the parameters are tuned. These pairing states are metastable against a polaron state dressed by particle-hole fluctuations for small SOC. At large SOC, a polaron-molecule transition exists, which suggests a phase transition between the topological superfluid state and the normal state for a highly polarized Fermi gas in the thermodynamic limit. As polarization in a Fermi gas with SOC is induced by the effective Zeeman field, we also discuss the influences of the effective Zeeman field on the ground state of the system. Our findings may be tested directly in future experiments. © 2012 American Physical Society.

Yu S.,National University of Singapore | Yu S.,Anhui University of Science and Technology | Chen Q.,National University of Singapore | Zhang C.,National University of Singapore | And 2 more authors.
Physical Review Letters | Year: 2012

We show that a single Bell's inequality with two dichotomic observables for each observer, which originates from Hardy's nonlocality proof without inequalities, is violated by all entangled pure states of a given number of particles, each of which may have a different number of energy levels. Thus Gisin's theorem is proved in its most general form from which it follows that for pure states Bell's nonlocality and quantum entanglement are equivalent. © 2012 American Physical Society.

He L.H.,Anhui University of Science and Technology
European Physical Journal E | Year: 2013

A general approach is proposed to analyze the complex photo- or thermo-response of glassy splay-bend and twist nematic sheets with boundary constraints. The governing equations are two-dimensional, as in the classical plate theory. However, the solution can generate exact three-dimensional displacement and stress distributions within the interior of the sheets, except the boundary layer whose width is of the same order of the sheet thickness. Graphical abstract: [Figure not available: see fulltext.] © 2013 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.

Qian K.,Chinese Academy of Sciences | Qian K.,Anhui University of Science and Technology | Liu H.,Chinese Academy of Sciences | Yang L.,Chinese Academy of Sciences | Liu J.,Chinese Academy of Sciences
Nanoscale | Year: 2012

In general, the procedures for producing a high density hot spots structure should be stable, inexpensive, and easy to make. It still remains a grand challenge to assemble silver or gold nanoparticles (Au NPs) with well-defined hot spots for SERS detection. In this study, we present a very simple method for designing and fabricating a surface-enhanced Raman scattering (SERS) substrate with high density hot spots, using large area positively charged polyaniline (PANI) nanofibers as template to assemble negatively charged Au NPs. In order to obtain the optimized SERS-active substrates, different experiments to synthesize diverse Au/PANI with different sizes of Au NPs from about 50, 30 to 15 nm were carried out. The results revealed that the PANI nanofibers were fully coated by the ∼15 nm Au NPs, forming a high density Au/PANI SERS substrate. The results evidence that we can obtain stable and sensitive SERS measurements. This journal is © 2012 The Royal Society of Chemistry.

Huang T.,Anhui University of Science and Technology
Annales Henri Poincare | Year: 2016

We consider an instanton, A, with L2-bounded curvature FA on the cylindrical manifold (Formula presented.), where M is a closed Riemannian n-manifold, (Formula presented.). We assume M admits a smooth 3-form P and a smooth 4-form Q satisfy (Formula presented.) and (Formula presented.). Manifolds with these forms include nearly Kähler 6-manifolds and nearly parallel G2-manifolds in dimension 7. Then we can prove that the instanton must be a flat connection. © 2016 Springer International Publishing

Xu H.,Anhui University of Science and Technology
Journal of Parallel and Distributed Computing | Year: 2010

Recently, cooperative communication mechanism is shown to be a promising technology to improve the transmit diversity only by a single transceiver antenna. Using this communication paradigm, multiple source nodes are able to coordinate their transmissions so as to obtain energy savings. As data aggregation is one of the most important operations in wireless sensor networks, this paper studies the energy-efficient data aggregation problem through cooperative communication. We first define the cooperative data aggregation (CDA) problem, and formally prove that this problem is NP-Hard. Due to the difficult nature of this problem, we propose a heuristic algorithm MCT for cooperative data aggregation. The theoretical analysis shows that this algorithm can reach the approximate performance ratio of 2. Moreover, the distributed implementation DMCT of the algorithm is also described. We prove that both centralized and distributed algorithms can construct the same topology for cooperative data aggregation. The experimental simulations show that the proposed algorithms will decrease the power consumption by about 12.5% and 66.3% compared with PEDAP and PEGASIS algorithms respectively. © 2010 Elsevier Inc. All rights reserved.

Liu Q.,Anhui University of Science and Technology
Journal of Geophysical Research: Atmospheres | Year: 2013

Truncation effect caused by limited swath width of low Earth orbiting (LEO) satellites results in inevitable underestimation of object scale when using pixel-counting methods. A new approach is proposed to obtain more accurate object scale through truncated measurements. The approach is based upon the mean object area fraction (MOAF), which depicts the relative population of object points in a varying-size domain and proves to be less sensitive to truncation effect. The MOAF-equivalent radius (MER) is deduced by comparing the actual MOAF with the standard one inferred from a circle object. Numerical simulations are implemented to demonstrate the MER characteristics. In contrast to area-equivalent radius (AER) that is merely determined by the absolute amount of object points, MER relies on the overall spatial structure of the object. For objects with irregular shapes, the MER value is generally smaller than AER in the absence of truncation. Nevertheless, taking the actual AER as true scale, MER has significantly reduced biases compared to AER once the object is truncated. This advantage can be reinforced when focusing on size statistics of analogous objects, because negative and positive biases associated with various truncation situations coexist in MER, against the uniform negative biases of AER. When applied to MODIS cloud mask data that are restricted in individual granules, MER has consistently larger values than AER for most truncated clouds. Compared with the explicitly problematic estimation from AER due to truncation, MER offers a notable elevation on the estimated cloud size and gets closer to the truth. Key Points A method is proposed to estimate object scale using truncated swath measurementsMean object area fraction (MOAF) is capable of mitigating truncation effectsMOAF-equivalent radius (MER) has lower biases than pixel-counting methods ©2013. American Geophysical Union. All Rights Reserved.

Wei R.,Anhui University of Science and Technology | Wei R.,Cornell University | Mueller E.J.,Cornell University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012

We theoretically study trapped one-dimensional Fermi gases in the presence of spin-orbit coupling induced by Raman lasers. The gas changes from a conventional (nontopological) superfluid to a topological superfluid as one increases the intensity of the Raman lasers above a critical chemical-potential-dependent value. Solving the Bogoliubov-de Gennes equations self-consistently, we calculate the density of states in real and momentum space at finite temperatures. We study Majorana fermions (MFs) which appear at the boundaries between topologically trivial and topologically nontrivial regions. We linearize the trap near the location of a MF, finding an analytic expression for the localized MF wave function and the gap between the MF state and other edge states. © 2012 American Physical Society.

Wu S.,Anhui University of Science and Technology | Wu S.,University of Calgary
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012

We derive quantitative relations among several naturally defined measures of classical and nonclassical correlations in a bipartite quantum state. We also obtain an upper bound of entanglement irreversibility and a sufficient condition for reversible entanglement. The additivity of entanglement of formation is directly related to the additivity of quantum discord as well as a certain measure of classical correlation. © 2012 American Physical Society.

Cai Z.,University of California at San Diego | Zhou X.,Anhui University of Science and Technology | Wu C.,University of California at San Diego | Wu C.,Tsinghua University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012

We investigate magnetic properties in the superfluid and Mott-insulating states of two-component bosons with spin-orbit (SO) coupling in two-dimensional square optical lattices. The spin-independent hopping integral t and SO coupled one λ are fitted from band-structure calculations in the continuum, which exhibit oscillations with increasing SO coupling strength. The magnetic superexchange model is derived in the Mott-insulating state with one particle per site, characterized by the Dzyaloshinsky-Moriya interaction. In the limit of |λ||t|, we find a spin spiral Mott state whose pitch value is the same as that in the incommensurate superfluid state, while in the opposite limit |t| |λ|, the ground state exhibits a 2×2 in-plane spin pattern. © 2012 American Physical Society.

Wang Z.,Anhui University of Science and Technology | Feng J.,National University of Singapore | Yan S.,National University of Singapore
International Journal of Computer Vision | Year: 2015

How to generate robust image representations, when there is contamination from noisy pixels within the images, is critical for boosting the performance of image classification methods. However, such an important problem is not fully explored yet. In this paper, we propose a novel image representation learning method, i.e., collaborative linear coding (CLC), to alleviate the negative influence of noisy features in classifying images. Specifically, CLC exploits the correlation among local features in the coding procedure, in order to suppress the interference of noisy features via weakening their responses on coding basis. CLC implicitly divides the extracted local features into different feature subsets, and such feature allocation is indicated by the introduced latent variables. Within each subset, the features are ensured to be highly correlated, and the produced codes for them are encouraged to activate on the identical basis. Through incorporating such regularization in the coding model, the responses of noisy local features are dominated by the responses of informative features due to their rarity compared with the informative features. Thus the final image representation is more robust and distinctive for following classification, compared with the coding methods without considering such high order correlation. Though CLC involves a set of complicated optimization problems, we investigate the special structure of the problems and then propose an efficient alternative optimization algorithm. We verified the effectiveness and robustness of the proposed CLC on multiple image classification benchmark datasets, including Scene 15, Indoor 67, Flower 102, Pet 37, and PASCAL VOC 2011. Compared with the well established baseline LLC, CLC consistently enhances the classification accuracy, especially for the images containing more noises. © 2014, Springer Science+Business Media New York.

Rui G.,University of Dayton | Rui G.,Anhui University of Science and Technology | Nelson R.L.,Air Force Research Lab | Zhan Q.,University of Dayton
Optics Letters | Year: 2011

In this Letter, we study the emission properties of an electric dipole emitter coupled to a plasmonic spiral structure. The plasmonic spiral structure functions as an optical antenna, coupling the electric dipole emission into circularly polarized unidirectional emission in the far field. Increasing number of turns of the spiral leads to narrower angular width of the emission pattern in the far field. For a spiral antenna with six turns, antenna directivity of 23:5 dB with a directional emission into a narrow angular cone of 4:3° can be achieved. The emitted photons carry spin that is essentially determined by the handedness of the spiral antenna. By reversing the spiral, one can switch the polarization of the emission field between left-hand and right-hand circular polarizations. The spiral antenna may be used as a nanoscale circular polarization source in single molecule sensing, single-photo sources, and integrated photonic circuits. © 2011 Optical Society of America.

Zhao T.-M.,Anhui University of Science and Technology | Miao R.-X.,The Interdisciplinary Center
Optics Letters | Year: 2011

We investigate the Casimir effect at a finite temperature in the electromagnetic Rindler space, and we find that the Casimir energy is proportional to T4/d2 in the high-temperature limit, where T ≈ 27°C is the temperature and d ≈ 100 nm is a small cutoff. We propose to make metamaterials to mimic the Rindler space and measure the predicted Casimir effect. Because the parameters of metamaterials we proposed are quite simple, this experiment would be easily implemented in the laboratory. © 2011 Optical Society of America.

Zhang S.,Anhui University of Science and Technology
Astrophysical Journal | Year: 2010

There is evidence from radio-loud quasars to suggest that the distribution of the Hβ broad emission line (BEL) gas is arranged in a predominantly planar orientation, and this result may well also apply to radio-quiet quasars. This would imply that the observed FWHM of the Hβ BELs is dependent on the orientation of the line of sight to the gas. If this view is correct then we propose that the FWHM can be used as a surrogate, in large samples, to determine the line of sight to the Hβ BELs in broad absorption line quasars (BALQSOs). The existence of broad UV absorption lines (BALs) means that the line of sight to BALQSOs must also pass through the BAL out-flowing gas. It is determined that there is a statistically significant excess of narrow-line profiles in the SDSS DR7 archival spectra of low-ionization broad absorption line quasars (LoBALQSOs), indicating that BAL gas flowing close to the equatorial plane does not commonly occur in these sources. We also find that the data is not well represented by random lines of sight to the BAL gas. Our best fit indicates two classes of LoBALQSOs, the majority (≈2/3) are polar outflows that are responsible for the enhanced frequency of narrowline profiles, and the remainder are equatorial outflows. We further motivated the line of sight explanation of the narrow-line excess in LoBALQSOs by considering the notion that the skewed distribution of line profiles is driven by an elevated Eddington ratio in BALQSOs. We constructed a variety of control samples comprised of non-LoBALQSOs matched to a de-reddened LoBALQSO sample in redshift, luminosity, black hole mass, and Eddington ratio. It is demonstrated that the excess of narrow profiles persists within the LoBALQSO sample relative to each of the control samples with no reduction of the statistical significance. Thus, we eliminate the possibility that the excess narrow lines seen in the LoBALQSOs arise from an enhanced Eddington ratio. © 2010. The American Astronomical Society. All rights reserved.

Bai J.,Shandong University | Li X.,Shandong University | Liu G.,Shandong University | Liu G.,Shandong Normal University | And 4 more authors.
Advanced Functional Materials | Year: 2014

A facile two-step strategy involving a polyol method and subsequent thermal annealing treatment is successfully developed for the large-scale preparation of ZnCo2O4 various hierarchical micro/nanostructures (twin mcrospheres and microcubes) without surfactant assistance. To the best of our knowledge, this is the first report on the synthesis of ZnCo2O 4 mesoporous twin microspheres and microcubes. More significantly, based on the effect of the reaction time on the morphology evolution of the precursor, a brand-new crystal growth mechanism, multistep splitting then in situ dissolution recrystallization accompanied by morphology and phase change, is first proposed to understand the formation of the 3D twin microshperes, providing new research opportunity for investigating the formation of novel micro/nanostructures. When evaluated as anode materials for lithium-ion batteries (LIBs), ZnCo2O4 hierarchical microstructures exhibit superior capacity retention, excellent cycling stability at the 5 A g-1 rate for 2000 cycles. Surprisingly, the ZnCo2O 4 twin microspheres show an exceptionally high rate capability up to the 10 A g-1 rate. It should be noted that such super-high rate performance and cycling stability at such high charge/discharge rates are significantly higher than most work previously reported on ZnCo 2O4 micro/nanostructures and ZnCo2O 4-based heterostructures. The ZnCo2O4 3D hierarchical micro/nanostructures demonstrate the great potential as negative electrode materials for high-performance LIBs. 3D hierarchical ZnCo 2O4 twin spheres are prepared via a convenient polyol process and subsequent thermal annealing. A multistep splitting in situ dissolution recrystallization originating from 1D nanorods is first proposed to understand the formation of the 3D nanoarchitectures. Lithium-ion batteries prepared with the 3D materials display remarkable performance in energy storage. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Wang R.-B.,Anhui University of Science and Technology | Feng H.-Y.,Nanjing University of Science and Technology
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2010

By using the tunable diode laser absorption spectroscopy(TDLAS) technology the absorption line of methane at the wavelength of 1653.72 nm is found to be free of interference and suitable for the measurement of coal mine methane. The high performance microcontroller(DSP) and second harmonic detection are used to lower the detection limit further that is below 0.074 mg/m3. It has an obvious advantage in sensitivity and stability and can achieve real-time measurement of the coal mine methane.

Zhang C.,National University of Singapore | Yu S.,National University of Singapore | Yu S.,Anhui University of Science and Technology | Chen Q.,National University of Singapore | Oh C.H.,National University of Singapore
Physical Review Letters | Year: 2013

Entanglement detection and estimation are fundamental problems in quantum information science. Compared with discrete-variable states, for which lots of efficient entanglement detection criteria and lower bounds of entanglement measures have been proposed, the continuous-variable entanglement is much less understood. Here we shall present a family of entanglement witnesses based on continuous-variable local orthogonal observables (CVLOOs) to detect and estimate entanglement of Gaussian and non-Gaussian states, especially for bound entangled states. By choosing an optimal set of CVLOOs, our entanglement witness is equivalent to the realignment criterion and can be used to detect bound entanglement of a class of 2+2 mode Gaussian states. Via our entanglement witness, lower bounds of two typical entanglement measures for arbitrary two-mode continuous-variable states are provided. © 2013 American Physical Society.

Yu J.,Anhui University of Science and Technology | Sun J.,CAS Shanghai Institute of Organic Chemistry | Yu B.,CAS Shanghai Institute of Organic Chemistry
Organic Letters | Year: 2012

Direct glycosylation of sugar oximes and HONHFmoc has been realized for the first time by using glycosyl ortho-hexynylbenzoates as donors under the catalysis of PPh3AuOTf, providing an effective approach to the synthesis of N-O linked saccharides, which are of great biological interest. © 2012 American Chemical Society.

Du X.,University of Massachusetts Amherst | Dubin P.L.,University of Massachusetts Amherst | Hoagland D.A.,University of Massachusetts Amherst | Sun L.,Anhui University of Science and Technology
Biomacromolecules | Year: 2014

Selective coacervation with hyaluronic acid (HA), a biocompatible and injectable anionic polysaccharide, was used to isolate a target protein, bovine serum albumin (BSA), with 90% purity from a 1:1 mixture with a second protein of similar pI, β-lactoglobulin (BLG). This separation was attributed to the higher HA-affinity of BSA, arising from its more concentrated positive domain. The values of pH corresponding respectively to the onset of complex formation, coacervation, precipitation, and redissolution (pHc, pH, pH p, and pHd) were determined as a function of ionic strength I. These pH values were related to critical values of protein charge, Z, and their dependence on I provided some insights into the mechanisms of these transitions. The higher polyanion binding affinity of BSA, deduced from its higher values of pHc, was confirmed by isothermal titration calorimetry (ITC). Confocal laser microscopy clearly showed time-dependent coalescence of vesicular droplets into a continuous film. Comparisons with prior results for the polycation poly(diallyldimethylammonium chloride) (PDADMAC) show reversal of protein selectivity due to reversal of the polyelectrolyte charge. Stronger binding of both proteins to PDADMAC established by ITC may be related to the higher chain flexibility and effective linear charge density of this polycation. © 2014 American Chemical Society.

Jiang C.,Chinese Academy of Sciences | Liu R.,Chinese Academy of Sciences | Han G.,Anhui University of Science and Technology | Zhang Z.,Chinese Academy of Sciences
Chemical Communications | Year: 2013

A chemically reactive Raman probe has been developed for ultrasensitively monitoring and imaging the in vivo generation of femtomolar oxidative species as induced by anti-tumor drugs in living cells. © 2013 The Royal Society of Chemistry.

Wang Z.,Anhui University of Science and Technology
Optics Communications | Year: 2011

We propose a scheme for atom localization in a four-level atomic system by means of a radio-frequency field driving a hyperfine transition within the two ground states. It is found that, due to the quantum disturbed effect induced by the radio-frequency field, the property of atom localization can be significantly controlled. This scheme shows some characteristics that other schemes of atom localization do not have, which may provide some possibilities for the technological applications in atom nano-lithography. © 2010 Elsevier B.V. All rights reserved.

Zhang X.,Nankai University | Chu X.,Nankai University | Wang L.,Nankai University | Wang H.,Nankai University | And 4 more authors.
Angewandte Chemie - International Edition | Year: 2012

Styling gels: The fusion protein ULD-TIP-1 (ULD=ubiquitin-like domain, TIP-1=Tax-interacting protein-1) enhances the interactions between self-assembled fibers formed by small molecules bearing a peptide that specifically binds to the ULD-TIP-1. The mechanical properties of the resulting hydrogels (see picture) are tuned by using peptides with different dissociation constants for the protein. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Tang K.,Max Planck Institute for Solid State Research | Mu X.,Max Planck Institute for Intelligent Systems (Stuttgart) | Van Aken P.A.,Max Planck Institute for Intelligent Systems (Stuttgart) | Yu Y.,Anhui University of Science and Technology | Maier J.,Max Planck Institute for Solid State Research
Advanced Energy Materials | Year: 2013

The authors thank G. Gotz for XRD measurement and A. Fuchs for SEM measurement. © 2013 WILEY-VCH Verlag GmbH & Co.

Zhang S.B.,Anhui University of Science and Technology
Computational Materials Science | Year: 2014

The bending mechanical behaviors of Ag nanowires with different microstructures and surface orientations are investigated via molecular dynamics simulations. Our results show the fivefold twin boundary strongly hinders the dislocation motion, leading to the dislocation pile-ups at twin boundaries which is different from the results from tensile tests in which the fivefold twin boundary does not act as the substantive barriers for dislocation propagation and the dislocations can easily pass through twin boundary. The fivefold twin boundary strengthens the nanowires by strain hardening. In single crystalline nanowires, the dislocation nucleation sites and dislocation characteristics are determined by the loading directions and surface orientations. The different dislocation characteristics lead to different ductility when the same nanowire is loaded along different directions. The first order effect of surface orientation on the dominant deformation mode has not been observed in the present work. The stress gradient plays an important role on the different results observed under tension and bending. © 2014 Elsevier B.V. All rights reserved.

Yang X.-F.,Nanyang Technological University | Hu X.-H.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology | Loh T.-P.,Nanyang Technological University
Organic Letters | Year: 2015

A Rh-catalyzed redox-neutral C-H functionalization of N-carbamoyl indolines with various internal alkynes has been developed. The reaction, which involves the sequential cleavage of the C-H bond of the indoline at the C7-position and the C-N bond of the urea motif, provides a divergent protocol to rapidly assemble fused-ring pyrroloquinolinone analogues by using a direct alkenylation/annulation strategy with high efficiency and selectivity. © 2015 American Chemical Society.

Huang H.-L.,Shandong University | Liu G.,Nanjing University | Ye Y.,Anhui University of Science and Technology
Communications in Mathematical Physics | Year: 2011

We study finite quasi-quantum groups in their quiver setting developed recently by the first author. We obtain a classification of finite-dimensional pointed Majid algebras of finite corepresentation type, or equivalently a classification of elementary quasi-Hopf algebras of finite representation type, over the field of complex numbers. By the Tannaka-Krein duality principle, this provides a classification of the finite tensor categories in which every simple object has Frobenius-Perron dimension 1 and there are finitely many indecomposable objects up to isomorphism. Some interesting information of these finite tensor categories is given by making use of the quiver representation theory. © 2011 Springer-Verlag.

Shi Z.,Hangzhou Normal University | Shi Z.,Nanyang Technological University | Yu P.,Hangzhou Normal University | Yu P.,Nanyang Technological University | And 4 more authors.
Angewandte Chemie - International Edition | Year: 2012

Under control: The first example of chiral amino phosphine catalysts for the title reaction between vinyl ketones and N-sulfonyl-1-aza-1,3-dienes has been developed. Under ambient conditions, this protocol provides straightforward access to densely functionalized, enantioenriched tetrahydropyridines with high levels of sterecontrol in good to excellent yields. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Yuan Y.,Anhui University | Cheng L.,Anhui University | Yang J.,Anhui University of Science and Technology
Journal of Physical Chemistry C | Year: 2013

A recent experiment reported that a newly crystallized phosphine-protected Au20 nanocluster [Au20(PPhy2) 10Cl4]Cl2 [PPhpy2 = bis(2-pyridyl)phenylphosphine] owns a very stable Au20 core, but the number of valence electrons of the Au20 core is 14e, which is not predicted by the superatom model. So we apply the density functional theory to further study this cluster from its molecular orbital and chemical bonding. The results suggest that the Au20(+6) core is an analogue of the F2 molecule based on the super valence bond model, and the 20-center-14-electron Au20(+6) core can be taken as a superatomic molecule bonded by two 11-center-7-electron superatoms, where the two 11c superatoms share two Au atoms and two electrons to meet an 8-electron closed shell for each. The electronic shell closure enhances the stability of the Au20 core, besides the PN bridges. Exceptionally, the theoretical HOMO-LUMO gap (1.03 eV) disagrees with the experimental value (2.24 eV), and some possible reasons for this big difference are analyzed in this paper. © 2013 American Chemical Society.

Liu N.,University of Tennessee at Knoxville | Liu N.,Anhui University of Science and Technology | Khomami B.,University of Tennessee at Knoxville
Physical Review Letters | Year: 2013

We report for the first time the polymer-induced breakdown of large-scale Taylor vortex structures leading to drag enhancement in viscoelastic turbulent Taylor-Couette flows. Specifically, we demonstrate that upon the addition of trace amounts of soluble high molecular weight macromolecules the Newtonian large-scale Taylor vortices are replaced by small-scale vortices in the inner and outer cylinder wall regions. This flow transition and a commensurate drag increase of up to 62% are facilitated by the presence of large polymeric normal stresses in a narrow region immediately close to the outer wall. A simple mechanism for this striking flow transition is proposed with the aim of paving the way for a mechanistic understanding of polymer-induced structure and drag modifications in high-Re turbulent curvilinear flows. © 2013 American Physical Society.

Mao T.,Anhui University of Science and Technology | Ng K.W.,University of Hong Kong
Extremes | Year: 2015

Let X1, … , Xn be independent nonnegative random variables with respective survival functions F¯1,…,F¯, and let Θ1, … , Θn be (not necessarily independent) nonnegative random variables, independent of X1, … , Xn, satisfying certain moment conditions. This paper consists of two parts. In the first part, we investigate second-order expansions of (Formula presented.) as t→∞ under the assumption that the F¯i are of second-order regular variation (2RV) with the same first-order index but with different second-order indexes. In the second part, under the assumption that the F¯1=⋯=F¯n have 2RV tails, second-order expansions of tail probabilities of the randomly weighted sum (Formula presented.) are studied. The closure property of 2RV under randomly weighted sum is also discussed. The main results in this paper generalize and strengthen several known results in the literature. © 2015, Springer Science+Business Media New York.

Shi J.-J.,Nanjing University | Shi J.-J.,Anhui University of Science and Technology | Yang G.-H.,Nanjing University | Zhu J.-J.,Nanjing University
Journal of Materials Chemistry | Year: 2011

Sonoelectrochemical technique was successfully used to fabricate alloy-graphene nanocomposites. It not only provides a simple way to synthesize alloy nanoparticles, but also shows a general strategy for fabricating graphene-based nanostructures with anticipated properties. Pd was co-electrodeposited with Pt at different atomic ratios, and then was anchored with reduced graphene oxide (RGO) simultaneously in the presence of PDDA. The morphologies and structures of the as-prepared PDDA-RGO-PdPt nanocomposites were extensively investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The composition was evaluated by energy dispersive X-ray spectrometry (EDS) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES). Raman spectra revealed the surface properties of graphene and its interaction with metallic nanoparticles. Cyclic voltammetric (CV) and chronoamperometric experiments further exhibited their catalytic activity and stability for the electro-oxidation of ethanol in alkaline media, which could be applied as promising electrocatalysts for direct alcohol fuel cells (DAFCs). © 2011 The Royal Society of Chemistry.

Zhan J.,Anhui University of Science and Technology
Molecular systems biology | Year: 2010

One limit on developing complex synthetic gene circuits is the lack of basic components such as transcriptional logic gates that can process combinatorial inputs. Here, we propose a strategy to construct such components based on reusable designs and convergent reengineering of well-studied natural systems. We demonstrated the strategy using variants of the transcription factor (TF) LacI and operator Olac that form specifically interacting pairs. Guided by a mathematical model derived from existing quantitative knowledge, rational designs of transcriptional NAND, NOR and NOT gates have been realized. The NAND gates have been designed based on direct protein-protein interactions in coupling with DNA looping. We demonstrated that the designs are reusable: a multiplex of logic devices can be readily created using the same designs but different combinations of sequence variants. The designed logic gates are combinable to form compound circuits: a demonstration logic circuit containing all three types of designed logic gates has been synthesized, and the circuit truthfully reproduces the pre-designed input-output logic relations.

Yin Y.,Anhui University of Science and Technology
Semiconductor Science and Technology | Year: 2010

The singlet-triplet relaxation in nanowire-based quantum dots induced by confined phonons is investigated theoretically. Due to the quasi-one-dimensional nature of the confined phonons, the singlet-triplet relaxation rates exhibit multi-peaks as a function of magnetic field, and the relaxation rate between the singlet and the spin-up triplet state is found to be enhanced in the vicinity of the singlet-triplet anti-crossing. We compare the effect of the deformation-potential coupling and the piezoelectric coupling and find that the deformation-potential coupling dominates the relaxation rates in most cases. © 2010 IOP Publishing Ltd.

Liu N.,University of Nebraska - Lincoln | Ding Y.,University of Nebraska - Lincoln | Ding Y.,Anhui University of Science and Technology | Fromm M.,University of Nebraska - Lincoln | Avramova Z.,University of Nebraska - Lincoln
Nucleic Acids Research | Year: 2014

Plants that have experienced several exposures to dehydration stress show increased resistance to future exposures by producing faster and/or stronger reactions, while many dehydration stress responding genes in Arabidopsis thaliana super-induce their transcription as a 'memory' from the previous encounter. A previously unknown, rather unusual, memory response pattern is displayed by a subset of the dehydration stress response genes. Despite robustly responding to a first stress, these genes return to their initial, pre-stressed, transcript levels during the watered recovery; surprisingly, they do not respond further to subsequent stresses of similar magnitude and duration. This transcriptional behavior defines the 'revised-response' memory genes. Here, we investigate the molecular mechanisms regulating this transcription memory behavior. Potential roles of abscisic acid (ABA), of transcription factors (TFs) from the ABA signaling pathways (ABF2/3/4 and MYC2), and of histone modifications (H3K4me3 and H3K27me3) as factors in the revised-response transcription memory patterns are elucidated. We identify the TF MYC2 as the critical component for the memory behavior of a specific subset of MYC2-dependent genes. © The Author(s) 2014.

Qin H.,Princeton Plasma Physics Laboratory | Qin H.,Anhui University of Science and Technology | Davidson R.C.,Princeton Plasma Physics Laboratory
Physical Review Letters | Year: 2013

A class of generalized Kapchinskij-Vladimirskij solutions of the Vlasov-Maxwell equations and the associated envelope equations for high-intensity beams in an uncoupled lattice is derived. It includes the classical Kapchinskij-Vladimirskij solution as a special case. For a given lattice, the distribution functions and the envelope equations are specified by ten free parameters. The class of solutions derived captures a wider range of dynamical envelope behavior for high-intensity beams, and thus provides a new theoretical tool to investigate the dynamics of high-intensity beams. © 2013 American Physical Society.

Feng M.,University of Pittsburgh | Zhao J.,University of Pittsburgh | Huang T.,University of Pittsburgh | Zhu X.,University of Texas at Austin | And 2 more authors.
Accounts of Chemical Research | Year: 2011

Electronic and optical properties of molecules and molecular solids are traditionally considered from the perspective of the frontier orbitals and their intermolecular interactions. How molecules condense into crystalline solids, however, is mainly attributed to the long-range polarization interaction. In this Account, we show that long-range polarization also introduces a distinctive set of diffuse molecular electronic states, which in quantum structures or solids can combine into nearly-free-electron (NFE) bands. These NFE properties, which are usually associated with good metals, are vividly evident in sp 2 hybridized carbon materials, specifically graphene and its derivatives.The polarization interaction is primarily manifested in the screening of an external charge at a solid/vacuum interface. It is responsible for the universal image potential and the associated unoccupied image potential (IP) states, which are observed even at the He liquid/vacuum interface. The molecular electronic properties that we describe are derived from the IP states of graphene, which float above and below the molecular plane and undergo free motion parallel to it. Rolling or wrapping a graphene sheet into a nanotube or a fullerene transforms the IP states into diffuse atom-like orbitals that are bound primarily to hollow molecular cores, rather than the component atoms. Therefore, we named them the superatom molecular orbitals (SAMOs). Like the excitonic states of semiconductor nanostructures or the plasmonic resonances of metallic nanoparticles, SAMOs of fullerene molecules, separated by their van der Waals distance, can combine to form diatomic molecule-like orbitals of C 60 dimers. For larger aggregates, they form NFE bands of superatomic quantum structures and solids.The overlap of the diffuse SAMO wavefunctions in van der Waals solids provides a different paradigm for band formation than the valence or conduction bands formed by interaction of the more tightly bound, directional highest occupied molecular orbitals (HOMOs) or the lowest unoccupied molecular orbitals (LUMOs). Therefore, SAMO wavefunctions provide insights into the design of molecular materials with potentially superior properties for electronics.Physicists and chemists have thought of fullerenes as atom-like building blocks of electronic materials, and superatom properties have been attributed to other elemental gas-phase clusters based on their size-dependent electronic structure and reactivity. Only in the case of fullerenes, however, do the superatom properties survive as delocalized electronic bands even in the condensed phase. We emphasize, however, that the superatom states and their bands are usually unoccupied and therefore do not contribute to intermolecular bonding. Instead, their significance lies in the electronic properties they confer when electrons are introduced, such as when they are excited optically or probed by the atomically sharp tip of a scanning tunneling microscope.We describe the IP states of graphene as the primary manifestation of the universal polarization response of a molecular sheet and how these states in turn define the NFE properties of materials derived from graphene, such as graphite, fullerenes, and nanotubes. Through low-temperature scanning tunneling microscopy (LT-STM), time-resolved two-photon photoemission spectroscopy (TR-2PP), and density functional theory (DFT), we describe the real and reciprocal space electronic properties of SAMOs for single C60 molecules and their self-assembled 1D and 2D quantum structures on single-crystal metal surfaces. © 2011 American Chemical Society.

Chen X.W.,China Academy of Engineering Physics | He L.L.,Anhui University of Science and Technology | Yang S.Q.,China Academy of Engineering Physics
European Journal of Mechanics, A/Solids | Year: 2010

An engineering model on mass abrasion of kinetic energy penetrator is presented to predict the nose shape and mass loss of the residual projectile after high-speed penetration into concrete. The experimental analysis indicates that the kinetic energy of penetrator (i.e., mass and velocity of projectile) and the hardness of aggregate of concrete significantly affect the mass abrasion of projectile. A theoretical upper limit exists for the mass loss. More general relationship between mass loss and impact function I of projectile is constructed. Graphical discussion declares that the most mass loss occurs on the nose of the projectile and the eroding nose approaches to an ogival shape with a smaller value of caliber-radius-head (CRH). A relative rate of mass abrasion on ogive-nose is further defined and analyzed. The mass loss from abrasion on kinetic energy (KE) penetrator may be evaluated through the variation of nose shape. © 2009 Elsevier Masson SAS. All rights reserved.

Li M.,Anhui University of Science and Technology
Gaoya Dianqi/High Voltage Apparatus | Year: 2011

Conventional on-line detection methods of partial discharge are interfered by surroundings, therefore some simulation models of typical partial discharge in transformers are constructed in laboratory, and the models are measured by both UHF narrowband and UHF wideband detection systems. The measurements indicate that for the UHF narrowband detection technique, the central frequency and the bandwidth of the measured signal are adjustable, so optimum central frequency and bandwidth can be selected to avoid interferences; and the UHF wideband detection technique can detect much partial discharge information due to its wider frequency band.

Zhou H.-X.,Florida State University | Pang X.,Florida State University | Lu C.,Anhui University of Science and Technology
Physical Chemistry Chemical Physics | Year: 2012

The binding of intrinsically disordered proteins (IDPs) to structured targets is gaining increasing attention. Here we review experimental and computational studies on the binding kinetics of IDPs. Experiments have yielded both the binding rate constants and the binding mechanisms, the latter via mutation and deletion studies and NMR techniques. Most computational studies have aimed at qualitative understanding of the binding rate constants or at mapping the free energy surfaces after the IDPs are engaged with their targets. The experiments and computation show that IDPs generally gain structures after they are engaged with their targets; that is, interactions with the targets facilitate the IDPs' folding. It also seems clear that the initial contact of an IDP with the target is formed by just a segment, not the entire IDP. The docking of one segment to its sub-site followed by coalescing of other segments around the corresponding sub-sites emerges as a recurring feature in the binding of IDPs. Such a dock-and-coalesce model forms the basis for quantitative calculation of binding rate constants. For both disordered and ordered proteins, strong electrostatic attraction with their targets can enhance the binding rate constants by several orders of magnitude. There are now tremendous opportunities in narrowing the gap in our understanding of IDPs relative to ordered proteins with regard to binding kinetics. © 2012 the Owner Societies.

Dong G.,Zhejiang Normal University | Lin X.,Zhejiang Normal University | Zhou H.,Zhejiang Normal University | Lu Q.,Anhui University of Science and Technology
Addictive Behaviors | Year: 2014

Internet addiction disorder (IAD) has raised widespread public health concerns. In this study, we explored the cognitive flexibility in IAD subjects using a color-word Stroop task. Behavioral and imaging data were collected from 15 IAD subjects (21.2. ±. 3.2. years) and 15 healthy controls (HC, 22.1. ±. 3.6. years). Group comparisons found that IAD subjects show higher superior temporal gyrus activations than healthy controls in switching (easy to difficult; difficult to easy) than in repeating trials. In addition, in difficult-to-easy situation, IAD subjects show higher brain activation in bilateral insula than healthy controls; in easy-to-difficult situation, IAD subjects show higher brain activation in bilateral precuneus than healthy controls. Correlations were also performed between behavioral performances and brain activities in relevant brain regions. Taken together, we concluded that IAD subjects engaged more endeavors in executive control and attention in the switching task. From another perspective, IAD subjects show impaired cognitive flexibilities. © 2013 Elsevier Ltd.

Zhou S.,Fujian Normal University | Xu J.-M.,Anhui University of Science and Technology
Information Sciences | Year: 2013

The growing size of the multiprocessor system increases its vulnerability to component failures. It is crucial to locate and to replace the faulty processors to maintain a system's high reliability. The fault diagnosis is the process of identifying faulty processors in a system through testing. In this paper, we show that the largest connected component of the survival graph contains almost all of the remaining vertices in the (n, k)-arrangement graph An,k when the number of moved faulty vertices is up to twice or three times the traditional connectivity. Using this fault resiliency, we establish the conditional diagnosability of An,k under the comparison model, and prove that the conditional diagnosability of An,k is (3k - 2)(n - k) - 3 for k ≥ 4, n ≥ k + 2; and the conditional diagnosability of A n,n-1 is 3n - 7 for n ≥ 5. © 2013 Elsevier Inc. All rights reserved.

Wei J.,Anhui University of Science and Technology
Disasters | Year: 2010

When and how often to release information on television are important issues in crisis and emergency risk communication. There is a lot of crisis information, including warnings and news, to which people should have access, but most of it is not significantly urgent to interrupt the broadcasting of television programmes. Hence, the right timing for the release of crisis information should be selected based on the importance of the crisis and any associated communication requirements. Using recursive methods, this paper builds an audience coverage model of crisis information release. Based on 2007 Household Using TV (HUT) data for Hefei City, China, the optimal combination of broadcasting sequence (with frequencies between one and eight times) is obtained using the implicit enumeration method. The developed model is applicable to effective transmission of crisis information, with the aim of reducing interference with the normal television transmission process and decreasing the psychological effect on audiences. The same model can be employed for other purposes, such as news coverage and weather and road information. © 2010 The Author(s). Journal compilation © Overseas Development Institute, 2010.

Yue Y.,Chinese University of Hong Kong | Wu C.,Chinese University of Hong Kong | Wu C.,Anhui University of Science and Technology
Biomaterials Science | Year: 2013

The development of safe, efficient and controllable gene-delivery vectors has become a bottleneck to human gene therapy. Synthetic polymeric vectors, although safer than viral carriers, generally do not possess the required efficacy, apparently due to a lack of functionality to overcome at least one of many intracellular gene-delivery obstacles. Currently, the exact mechanisms of how these polymeric vectors navigate each intracellular obstacle ("slit"), as well as their particular physical/chemical properties that contribute to efficient intracellular trafficking remain largely unknown, making it rather difficult to further improve the efficacy of non-viral polymeric vectors in vitro and in vivo. In this review, we first give a brief overview of synthetic polymeric vectors that have been designed and developed for gene delivery and highlight some promising candidates for clinical applications. Our main focus is on discussing the intracellular trafficking mechanisms of the DNA-polymer complexes ("polyplexes"), with less effort on the DNA-polymer complexation in the extracellular space as well as the in vivo systemic administration of genes in animal models and human clinical trials. In particular, we identified and discussed four critical, but often over-looked issues for successful DNA-polymer intracellular trafficking, especially our recent confirmation that it is free cationic polymer chains in the solution mixture of DNA and polymer that actually promote gene transfection and the polycationic chains within the polyplexes mainly play a protective role. Instead of the previously proposed and widely used escape model from late endolysosomes, the current hypothesis is that free polycationic chains with a sufficient length (∼20 nm) can block the initial endocytic-vesicle-to- endolysosome pathway. © 2013 The Royal Society of Chemistry.

Huang W.,CAS Xishuangbanna Tropical Botanical Garden | Huang W.,Anhui University of Science and Technology | Zhang S.-B.,CAS Xishuangbanna Tropical Botanical Garden | Cao K.-F.,CAS Xishuangbanna Tropical Botanical Garden
Plant and Cell Physiology | Year: 2011

Our previous study indicated that PSII is more sensitive to chilling and light stress than PSI in tropical trees, and Erythrophleum guineense is more sensitive to chilling stress than Dalbergia odorifera and Khaya ivorensis, but the underlying physiological mechanisms are unclear. Although recent studies have reported that cyclic electron flow (CEF) plays an important role in photoprotection, the role of CEF in protecting PSI and PSII of tropical tree species remains unclear. We investigated the effect of temporal chilling temperature on energy distribution in PSII, the redox state of P700 and CEF in the above-mentioned tropical evergreen tree species grown in an open field. Our results indicated that the overclosure of PSII reaction centers at chilling temperature led to excess excitation pressure in PSII. At the temporal chilling temperature under low light, PSI acceptor side limitation [Y(NA)] was lower than those at 25°C for all species. Although the effective quantum yield of CEF [Y(CEF)] was not significantly stimulated in E. guineense and K. ivorensis under temporal chilling at low light levels, the ratio of Y(CEF) to the effective quantum yield of PSII [Y(II)] significantly increased. Under chilling conditions Y(CEF)/Y(II) was stimulated much more in K. ivorensis and D. odorifera compared with that in the chilling-sensitive E. guineense. These results suggested that stimulation of Y(CEF)/Y(II) plays an important role in protecting PSI and PSII from photoinhibition caused by chilling stress. © 2011 The Author.

Ding G.-J.,Anhui University of Science and Technology | King S.F.,University of Southampton
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2016

The generalized CP transformations can only be consistently defined in the context of Δ(3n2) lepton symmetry if a certain subset of irreducible representations are present in a model. We perform a comprehensive analysis of the possible automorphisms and the corresponding CP transformations of the Δ(3n2) group. It is sufficient to only consider three automorphisms if n is not divisible by 3 while an additional eight types of CP transformations could be imposed for the case of n divisible by 3. We study the lepton mixing patterns which can be derived from the Δ(3n2) family symmetry and generalized CP in the semidirect approach. The PMNS matrix is determined to be the trimaximal pattern for all the possible CP transformations, and it can only take two distinct forms. © 2016 American Physical Society.

Bian L.,Chongqing University | Bian L.,CAS Institute of Theoretical Physics | Chen N.,Anhui University of Science and Technology | Liu D.,CAS Institute of Theoretical Physics | And 2 more authors.
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2016

We explain the recent diphoton excesses around 750 GeV by both ATLAS and CMS as a singlet scalar Φ which couples to SM gluon and neutral gauge bosons only through higher-dimensional operators. A natural explanation is that Φ is a pseudo-Nambu-Goldstone boson (pNGB) which receives parity violation through anomaly if there exists a hidden strong dynamics. The singlet and other light pNGBs will decay into two SM gauge bosons and even serves as the metastable colored states which can be probed in the future. By accurately measuring their relative decay and the total production rate in the future, we will learn the underlying strong dynamics parameter. The lightest baryon in this confining theory could serve as a viable dark matter candidate. © 2016 American Physical Society.

Chen Y.,Anhui University of Science and Technology
Ultramicroscopy | Year: 2016

Data fusion for rough surface measurement and evaluation was analyzed on simulated datasets, one with higher density (HD) but lower accuracy and the other with lower density (LD) but higher accuracy. Experimental verifications were then performed on laser scanning microscopy (LSM) and atomic force microscopy (AFM) characterizations of surface areal roughness artifacts. The results demonstrated that the fusion based on Gaussian process models is effective and robust under different measurement biases and noise strengths. All the amplitude, height distribution, and spatial characteristics of the original sample structure can be precisely recovered, with better metrological performance than any individual measurements. As for the influencing factors, the HD noise has a relatively weaker effect as compared with the LD noise. Furthermore, to enable an accurate fusion, the ratio of LD sampling interval to surface autocorrelation length should be smaller than a critical threshold. In general, data fusion is capable of enhancing the nanometrology of rough surfaces by combining efficient LSM measurement and down-sampled fast AFM scan. The accuracy, resolution, spatial coverage and efficiency can all be significantly improved. It is thus expected to have potential applications in development of hybrid microscopy and in surface metrology. © 2016 Elsevier B.V.

Zhou R.L.,Hefei University of Technology | Wang L.,Hefei University of Technology | Pan B.C.,Anhui University of Science and Technology
Journal of Physical Chemistry C | Year: 2010

In this paper, the elastic and melting properties of single-crystal SiC nanotubes were investigated with the help of molecular dynamics simulation based on the Tersoff bond-order potential. It was found that the Young's moduli and melting temperatures were tightly dependent on the wall thickness of the SiC nanotube, and the radius of the nanotube slightly influences these properties. Our calculations predicted that the Young's moduli decrease monotonously toward the values of bulk SiC crystals as the wall thicknesses increase. For the SiC nanotubes with the same wall thicknesses, the calculated Young's moduli are almost identical no matter how large the difference of the radius between them is. The reason is that the ratios of volume to surface of SiC nanotubes increase as their wall thicknesses increase, whereas the ratios remain constant when the wall thicknesses are invariable. On the contrary, the melting temperatures (starting melting temperature T1 and entirely molten temperature T2) of SiC nanotubes exhibit an increasing behavior as the wall thicknesses increase. This is because the single-crystal SiC nanotubes melt from the outer and inner surface layers toward the center layers. Consequently, the thin nanotubes with fewer body atomic layers possess lower melting temperature and the thick nanotubes have higher melting temperature. Both Young's modulus and melting temperatures do not change significantly when the wall thickness of a SiC nanotube is larger than 2 nm, which indicates that the thick single-crystal SiC nanotubes inherit the superior mechanical and thermal properties of bulk SiC crystals. According to our calculations, single-crystal SiC nanotubes are perhaps the best candidate of one-dimensional semiconducting materials for nanoscale electronic devices under harsh environments. © 2010 American Chemical Society.

Tao Z.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Zhu Z.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Wang H.,Anhui University of Science and Technology | Liu W.,CAS Hefei Key Laboratory of Materials for Energy Conversion
Journal of Power Sources | Year: 2010

BaCe1-xGaxO3-δ (x = 0.1, 0.2) and BaCe0.8Y0.2O3 (BCY) powders are successfully synthesized by a solid-state reaction method. According to thermal gravity analysis in the atmosphere of CO2, BaCe0.9Ga0.1O3-δ (BCG10) and BaCe0.8Ga0.2O3-δ (BCG20) are quite stable while BaCeO3 shows obvious reaction and decomposes into CeO2 and BaCO3. A fuel cell with electrolyte of BaCe0.8Ga0.2O3-δ is prepared by a suspension spray combining with in situ sintering method and tested from 600 to 700 °C with humidified hydrogen (∼3% H2O) as the fuel and the static air as the oxidant. An open-circuit potential of 0.99 V and a maximum power density of 236 mW cm-2 are obtained for the single cell with an interface resistance 0.32 Ω cm2 at 700 °C. © 2009 Elsevier B.V. All rights reserved.


Wang G.-W.,Anhui University of Science and Technology
Chemical Society Reviews | Year: 2013

Recently, mechanical milling using a mixer mill or planetary mill has been fruitfully utilized in organic synthesis under solvent-free conditions. This review article provides a comprehensive overview of various solvent-free mechanochemical organic reactions, including metal-mediated or -catalyzed reactions, condensation reactions, nucleophilic additions, cascade reactions, Diels-Alder reactions, oxidations, reductions, halogenation/aminohalogenation, etc. The ball milling technique has also been applied to the synthesis of calixarenes, rotaxanes and cage compounds, asymmetric synthesis as well as the transformation of biologically active compounds. © 2013 The Royal Society of Chemistry.

Jiang H.-L.,Texas A&M University | Jiang H.-L.,Anhui University of Science and Technology | Makal T.A.,Texas A&M University | Zhou H.-C.,Texas A&M University
Coordination Chemistry Reviews | Year: 2013

Interpenetration in metal-organic frameworks (MOFs) is an intriguing phenomenon with significant impacts on the structure, porous nature, and functional applications of MOFs. In this review, we provide an overview of interpenetration involved in MOFs or coordination polymers with different dimensionalities and property changes (especially gas uptake capabilities and catalysis) caused by framework interpenetration. Successful approaches for control of interpenetration in MOFs have also been introduced and summarized. © 2013 .

Wang S.,Anhui University of Science and Technology
Physics of Plasmas | Year: 2011

A theoretical model is proposed to interpret the counter-current rotation driven by the lower-hybrid-wave observed in the tokamak lower-hybrid-wave parallel current drive experiments. It is found that ions absorb the toroidal momentum indirectly from the wave through collisional friction with the resonant electrons that directly take the momentum from the wave through Landau resonance. This momentum coupling pumps out the ions to produce a negative radial electric field and makes the plasma rotate in the counter-current direction. © 2011 American Institute of Physics.

Wu C.,Chinese University of Hong Kong | Wu C.,Anhui University of Science and Technology
Macromolecules | Year: 2012

Chain confinement and translocation in and through a small pore is studied to find why RNA and protein chains are linear and not colliding inside nuclear pores. Experimental and theoretical results show that RNA and protein chains are linear. If they were branched, the critical flow rate for them to pass through nuclear pores would be varying for different branching structures and different molar masses, but the thermally agitated motions of a nuclear membrane are passive such that the induced flow rate cannot be automatically adjusted for branched chains with different structures. Studied have also found that there is sufficient time for a linear RNA or protein chain to pass through a nuclear pore completely without being driven back and forth inside a nuclear pore by the breathing motions.

Stroka K.M.,Johns Hopkins University | Jiang H.,Johns Hopkins University | Jiang H.,Anhui University of Science and Technology | Chen S.-H.,Johns Hopkins University | And 4 more authors.
Cell | Year: 2014

Cell migration is a critical process for diverse (patho)physiological phenomena. Intriguingly, cell migration through physically confined spaces can persist even when typical hallmarks of 2D planar migration, such as actin polymerization and myosin II-mediated contractility, are inhibited. Here, we present an integrated experimental and theoretical approach ("Osmotic Engine Model") and demonstrate that directed water permeation is a major mechanism of cell migration in confined microenvironments. Using microfluidic and imaging techniques along with mathematical modeling, we show that tumor cells confined in a narrow channel establish a polarized distribution of Na +/H+ pumps and aquaporins in the cell membrane, which creates a net inflow of water and ions at the cell leading edge and a net outflow of water and ions at the trailing edge, leading to net cell displacement. Collectively, this study presents an alternate mechanism of cell migration in confinement that depends on cell-volume regulation via water permeation. PaperFlick © 2014 Elsevier Inc.

Cheng J.-K.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology | Loh T.-P.,Nanyang Technological University
Journal of the American Chemical Society | Year: 2015

A zerovalent copper- and cobalt-catalyzed direct coupling of the sp3 α-carbon of alcohols with alkenes and hydroperoxides was developed in which the hydroperoxides acted as radical initiator and then coupling partner. 1,3-Enynes and vinylarenes underwent alkylation-peroxidation to give β-peroxy alcohols and β-hydroxyketones correspondingly with excellent functional group tolerance. The resulting β-peroxy alcohols could be further transformed into β-hydroxyynones and propargylic 1,3-diols. © 2014 American Chemical Society.

Yang X.-F.,Nanyang Technological University | Hu X.-H.,Nanyang Technological University | Feng C.,Nanyang Technological University | Loh T.-P.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemical Communications | Year: 2015

A Rh(iii)-catalyzed regioselective C-H alkenylation and alkynylation of indolines is described. This protocol relies on the use of a removable pyridinyl directing group to access valuable C-7 functionalized indoline scaffolds with ample substrate scope and broad functional group tolerance. This journal is © The Royal Society of Chemistry.

Li G.,University of Alabama in Huntsville | Miao B.,Anhui University of Science and Technology | Hu Q.,University of Alabama in Huntsville | Qin G.,CAS Center for Space Science and Applied Research
Physical Review Letters | Year: 2011

The MHD turbulence theory developed by Iroshnikov and Kraichnan predicts a k-1.5 power spectrum. Solar wind observations, however, often show a k-5/3 Kolmogorov scaling. Based on 3 years worth of Ulysses magnetic field data where over 28000 current sheets are identified, we propose that the current sheet is the cause of the Kolmogorov scaling. We show that for 5 longest current-sheet-free periods the magnetic field power spectra are all described by the Iroshnikov-Kraichnan scaling. In comparison, for 5 periods that have the most number of current sheets, the power spectra all exhibit Kolmogorov scaling. The implication of our results is discussed. © 2011 American Physical Society.

Chen H.,University of Tennessee at Knoxville | Zhu W.,University of Tennessee at Knoxville | Zhu W.,Oak Ridge National Laboratory | Xiao D.,Oak Ridge National Laboratory | And 2 more authors.
Physical Review Letters | Year: 2011

Surface states-the electronic states emerging as a solid material terminates at a surface-are usually vulnerable to contaminations and defects. The robust topological surface state(s) (TSS) on the three-dimensional topological insulators provide a perfect platform for exploiting surface states in less stringent environments. Employing first-principles density functional theory calculations, we demonstrate that the TSS can play a vital role in facilitating surface reactions by serving as an effective electron bath. We use CO oxidation on gold-covered Bi2Se3 as a prototype example, and show that the robust TSS can significantly enhance the adsorption energy of both CO and O2 molecules, by promoting different directions of static electron transfer. The concept of TSS as an electron bath may lead to new design principles beyond the conventional d-band theory of heterogeneous catalysis. © 2011 American Physical Society.

Feng C.,Nanyang Technological University | Feng D.,Nanyang Technological University | Loh T.-P.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemical Communications | Year: 2015

Rhodium-catalyzed C-H allylation of acrylamides with allyl acetates is reported. The use of weakly coordinating directing group resulted in high reaction efficiency, broad functionality tolerance and excellent γ-selectivity, which opens a new synthetic pathway for the access of 1,4-diene skeletons. © 2015 The Royal Society of Chemistry.

Dai Z.,Chinese University of Hong Kong | Wu C.,Chinese University of Hong Kong | Wu C.,Anhui University of Science and Technology
Macromolecules | Year: 2012

Complexation between DNA with anionic charges (P) and polyethylenimine (PEI) with cationic charges (N) in aqueous solution condenses DNA into small insoluble aggregates (polyplexes), facilitating its delivery into cells. The study of the captioned problem is long overdue. Using a combination of static and dynamic laser light scattering, we showed that for a given topology PEI with a high molar mass is more effective in condensing DNA, while for a given molar mass, linear chains are more efficient in neutralizing DNA than their branched counterparts. The resultant polyplexes become stable when N/P ≥ 6 and, quantitatively, on average contain only one DNA. The ratio of gyration to hydrodynamic radii decreases after the DNA and PEI complexation but increases with the N/P ratio. This study reveals that linear chains can align themselves on DNA to effectively neutralize its anionic charges so that DNA collapses in water mainly due to its insolubility like a neutral hydrocarbon chain, while cationic branched chains condense each DNA chain mainly by pulling its intrachain anionic segments together and coat its periphery to form a mushroom-like PEI shell. Such two different condensation ways are supported by the results of adding strong polyanions (dextran sulfate, DS) into the polyplexes dispersion; namely, DS can ripe linear chains away from each polyplex layer by layer, like peeling an onion, to completely release DNA, but mostly strip cationic branched chains coated on the periphery, not those inside, to partially release DNA. © 2012 American Chemical Society.

Liu Y.,Anhui University of Science and Technology
The Journal of chemical physics | Year: 2012

The density of states of trpzip2, a β-hairpin peptide, has been explored at all-atom level. Replica exchange Monte Carlo method was used for sufficient sampling over a wide range of temperature. Micro-canonical analysis was performed to confirm that the phase transition behavior of this two-state folder is first-order-like. Canonical analysis of heat capacity suggests that hydrogen bonding interaction exerts a considerable positive influence on folding cooperativity, in contrast, hydrophobic interaction is insufficient for high degree of folding cooperativity. Furthermore, we explain physical nature of the folding process from free energy landscape perspective and extensively analyse hydrogen bonding and stacking energy.

Zhang Z.,Anhui University of Science and Technology
The Journal of chemical physics | Year: 2012

We have studied the dynamics of a flexible polymer chain in constrained dumb-bell-shape geometry subject to a periodic force and external noise along the longitudinal direction. It is found that the system exhibits a feature of entropic stochastic resonance (ESR), i.e., the temporal coherence of the polymer motion can reach a maximum level for an optimal noise intensity. We demonstrate that the occurrence of ESR is robust to the change of chain length, while the bottleneck width should be properly chosen. A gravity force in the vertical direction is not necessary for the ESR here, however, the elastic coupling between polymer beads is crucial.

Ding G.-J.,Anhui University of Science and Technology | King S.F.,University of Southampton | Luhn C.,Durham University | Stuart A.J.,University of Southampton
Journal of High Energy Physics | Year: 2013

We construct models of leptons based on S4 family symmetry combined with a generalised CP symmetry HCP . We show how the flavon potential can spontaneously break the symmetry S4 × H CP down to Z2 × HCP v in the neutrino sector, where the choice of preserved CP symmetry HCP v is controlled by free (real) parameters in the flavon potential. We propose two realistic models of this kind, one at the effective level and one at the renormalisable level. Both models predict trimaximal lepton mixing with CP being either fully preserved or maximally broken, with the intermediate possibility forbidden by the structure of the models. © 2013 SISSA, Trieste, Italy.

Li S.,Wenzhou University | Chen P.,Anhui University | Zhang L.,Wenzhou University | Liang H.,Anhui University of Science and Technology
Langmuir | Year: 2011

The geometric frustration phases are investigated for diblock copolymers in nanoparticles with neutral surfaces using real-space self-consistent field theory. First, a rich variety of geometric frustration phases with specific symmetries are observed in the polymer nanoparticles with invariable diameters by constructing the phase diagrams arranged as the volume fraction and Flory-Huggins interaction parameter. Most of the space in the phase diagram is filled with phases with strong symmetries, such as spherical or cubic symmetries, while a number of asymmetric or axisymmetric phases are located in a narrow space in the diagram. Then the geometric frustration phases are examined systematically for the diblock copolymers with special polymer parameters, and a rich variety of novel frustration phases with multilayered structures are observed by varying the diameters of the nanoparticles. Furthermore, the investigations on the free energies indicate that the transitions between these frustrated phases are first-order, and the formation mechanism of the frustration phases is reasonably elucidated. © 2011 American Chemical Society.

A novel approach toward phase-locking of two independently produced yet energetically degenerate coherent anti-Stokes Raman scattering (CARS) processes is put forward. The proposed all-optical implementation involves a modified Mach-Zehnder interferometer, which is utilized to transfer phase coherence from three totally uncorrelated laser beams into two degenerate CARS beams that are produced in two distinct Raman active samples. Such a CARS interferometer based on coherent phase transport allows explicit measurement and control of phase differences between the two phase-locked degenerate CARS processes, and hence may find applications in pertinent research fields such as CARS spectroscopy (tomography) as well as quantum information processing and transfer. © 2011 John Wiley & Sons, Ltd.

Ding G.-J.,Anhui University of Science and Technology | King S.F.,University of Southampton
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2014

We perform a comprehensive study of the Δ(96) family symmetry combined with the generalized CP symmetry HCP. We investigate the lepton mixing parameters which can be obtained from the original symmetry Δ(96)?HCP breaking to different remnant symmetries in the neutrino and charged lepton sectors, namely Gν and Gl subgroups in the neutrino and the charged lepton sector, respectively, and the remnant CP symmetries from the breaking of HCP are HCPν and HCPl, respectively, where all cases correspond to a preserved symmetry smaller than the full Klein symmetry, as in the semidirect approach, leading to predictions which depend on a single undetermined real parameter, which may be fitted to the reactor angle for example. We discuss 26 possible cases, including a global χ2 determination of the best fit parameters and the correlations between mixing parameters, in each case. © 2014 American Physical Society.

Zhao W.,Anhui University of Science and Technology | Li M.,The Interdisciplinary Center
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2014

The cosmological birefringence caused by the coupling between the cosmic scalar field and the cosmic microwave background (CMB) photons through the Chern-Simons term can rotate the polarization planes of the photons and mix the CMB E-mode and B-mode polarizations. The rotation angle induced by the dynamical scalar field can be separated into the isotropic background part and the anisotropic fluctuations. The effect of the background part has been studied in our previous work (Zhao and Li, arXiv:1402.4324). In this paper, we focus on the influence of the anisotropies of the rotation angle. We first assume that the cosmic scalar field is massless, consistent with other works, and we find that the rotation spectrum can be quite large, which may be detected by the potential CMB observations. However, if the scalar field is identified as the quintessence field, by detailed discussion of both the entropy and adiabatic perturbation modes for the first time, we find that the anisotropies of the rotation angle are always too small to be detectable. In addition, as the main goal of this paper, we investigate the effect of a rotated polarization power spectrum on the detection of relic gravitational waves. We find that the rotated B-mode polarization could be fairly large and comparable with those generated by the gravitational waves. This forms a new contamination for the detection of relic gravitational waves in the CMB. In particular, we also propose the method to reconstruct and subtract the rotated B-mode polarization, by which the residuals become negligible for the gravitational-wave detection. © 2014 American Physical Society.

Chen Y.,Anhui University of Science and Technology
Scanning | Year: 2016

Summary Quantitative evaluation of dimensional parameters from noisy atomic force microscopy (AFM) images was investigated. Non-local means (NLM) denoising was adopted to reduce noise and maintain fine image structures. Major tuning parameters in NLM filtering, such as the patch size and the window size, were optimized on simulated surface structures. The ability of dimensional evaluation from noisy data was demonstrated to be improved by almost 15 times. Finally, NLM filtering with optimal settings was applied on experimental AFM images, which were scanned on a patterned few-layer graphene specimen. Evaluations of the step height and the pattern size were verified to be much more accurate and robust. Such a data processing method can enhance the AFM dimensional measurements, particularly when the noise-level is reached. SCANNING 38:113-120, 2016. © 2015 Wiley Periodicals, Inc.

Lu W.,City University of Hong Kong | Lu W.,Anhui University of Science and Technology | Lu Y.Y.,City University of Hong Kong
Journal of Computational Physics | Year: 2012

For optical waveguides with high index-contrast and sharp corners, existing full-vectorial mode solvers including those based on boundary integral equations typically have only second or third order of accuracy. In this paper, a new full-vectorial waveguide mode solver is developed based on a new formulation of boundary integral equations and the so-called Neumann-to-Dirichlet operators for sub-domains of constant refractive index. The method uses the normal derivatives of the two transverse magnetic field components as the basic unknown functions, and it offers higher order of accuracy where the order depends on a parameter used in a graded mesh for handling the corners. The method relies on a standard Nyström method for discretizing integral operators and it does not require analytic properties of the electromagnetic field (which are singular) at the corners. © 2011 Elsevier Inc.

Jun L.,Anhui University of Science and Technology
Advances in Information Sciences and Service Sciences | Year: 2012

The evaluation of the economic benefits of investment projects is calculated with the total cost and overall benefits. Due to its complexity and changeability, the risk analysis of investment projects should be made from the perspective of system analysis. This complex economic benefits system should be decomposed into several subsystems with regard to its hierarchy and decomposability, and it is easier to analyze the risk of smaller subsystems. Based on the above analysis, the sub-normal distribution model is adopted to describe the economic benefits of investment project.

Cheng L.,Anhui Science and Technology University | Ren C.,Xiamen University | Zhang X.,Anhui Science and Technology University | Yang J.,Anhui University of Science and Technology
Nanoscale | Year: 2013

Based on the recently proposed super valence bond model, in which superatoms can compose superatomic molecules by sharing valence pairs and nuclei for shell closure, the 23c-14e bi-icosahedral Au23(+9) core of Au38(SR)24 is proved to be a superatomic molecule. Molecular orbital analysis reveals that the Au23(+9) core is an exact analogue of the F2 molecule in electronic configuration. Chemical bonding analysis by the adaptive natural density partitioning method confirms the superatomic molecule bonding framework of Au38(SR) 24 in a straightforward manner. © 2013 The Royal Society of Chemistry.

Pan Y.S.,Anhui University of Science and Technology
Zhongguo gu shang = China journal of orthopaedics and traumatology | Year: 2013

Articular cartilage damage is very common in clinical practices. Due to the low self-healing abilities of articular cartilage, the repair strategies for articular cartilage such as arthroscopic lavage and debridement,osteaochondral or chondrocytes transplantation, tissue engineering and hydrogel based artificial cartilage materials are the primary technologies of repairing articular cartilage defect. In this paper,the main repair strategies for the articular cartilage damage and the advantages or disadvantages of each repair technology are summarized. The arthroscopic lavage and debridement is successful in treating the early stage of osteoarthritis. Osteochondral and chondrocytes transplantation are beneficial to treat small full thickness defects. The technology of tissue engineering becomes a new method to heal articular cartilage damage, but the major problem is the absence of bonding strength between the implants and natural defect surfaces. Hydrogel based artificial cartilage possesses similar bio-mechanical and bio-tribological performances to that of natural articular cartilage. However, both bioactivity and interfacial bonding strength between the implant and natural cartilage could be further improved. How to simultaneously optimize the mechanical and bioactive as well as biotribological properties of hydrogel based materials is a focus problem concerned.

Zhang S.B.,Anhui University of Science and Technology
Computational Materials Science | Year: 2015

The mechanical behaviors of fivefold twinned (FT) Ag nanowires under compression are investigated by molecular dynamics simulations. As a comparison, the single crystalline (SC) nanowires are also investigated. The fivefold twin boundary strengthens not only the tensile yield strength but also the compressive yield strength, suggesting the initial stress distribution is not the main factor behind the strengthening. The modulus-based explanation is also found invalid since similar modulus is observed between these two types of nanowires. In contrast to "dislocation starvation" state observed in SC nanowires under compression, the addition of fivefold twin boundary into nanowires leads to complex dislocation-dislocation and dislocation-twin interactions, contributing to increased dislocation density. While extend dislocation slip dominates the plastic deformation in SC nanowires, generation of {0 0 1}〈1 1 0〉Lomer dislocations and their subsequent cross-slip are found to be the dominant deformation mechanisms in FT Ag nanowires under compression. Effects of boundary condition and sample geometry on plastic deformation behaviors are also investigated. © 2014 Elsevier B.V. All rights reserved.

Zhu Z.,Anhui University of Science and Technology
IEEE Communications Letters | Year: 2011

We develop a theoretical model to estimate the BER evolutions in optical translucent networks in a more accurate way. The model calculates the BER increment at each regeneration site with considerations of reshaping nonlinearity and jitter effect for 40 Gb/s signals. Based on the model, we propose a novel translucent optical network infrastructure that includes all-optical 2R regenerators and uses mixed operation of 1R/2R/3R regenerators for cost and power consumption savings. Simulation results show that our proposed infrastructure reduces the number of O/E/O 3R regenerators to less than 50% and achieves effective power saving. © 2011 IEEE.

Huang X.,Imperial College London | Rein G.,Imperial College London | Chen H.,Anhui University of Science and Technology
Proceedings of the Combustion Institute | Year: 2015

Smoldering combustion is the slow, low-temperature, flameless burning of porous fuels and the most persistent type of combustion. It is the driving phenomenon of wildfires in peatlands, like those causing haze episodes in Southeast Asia and Northeast Europe, but is poorly understood. In this work, we develop a comprehensive 1-D model of a reactive porous media, using the open-source code Gpyro, to investigate smoldering combustion of natural fuels with an emphasis on the roles of the moisture and inert contents. The model solves the species, momentum, and energy conservation equations and includes heterogeneous chemical reactions. A previously developed 5-step reaction scheme for peat, including evaporation of water, is adopted to describe the drying, thermal and oxidative degradation during the smoldering combustion. The model predicts the transient temperature, species, and reaction profiles during ignition, spread, and extinction. The predicted smoldering thresholds related to the critical moisture and inorganic contents for ignition show a good agreement with the experimental results in the literature for a wide range of peat types and organic soils. The influences of the kinetic parameters, physical properties, and ignition protocol are investigated. This is the first time that a physics-based model of smoldering peat fires is developed, thus helping to understand this important natural and widespread phenomenon. © 2014 The Authors.

Xu X.-W.,Beijing Computational Science Research Center | Li Y.,Beijing Computational Science Research Center | Li Y.,Anhui University of Science and Technology
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2015

We demonstrate the possibility of optical nonreciprocal response in a three-mode optomechanical system where one mechanical mode is optomechanically coupled to two linearly coupled optical modes simultaneously. The optical nonreciprocal behavior is induced by the phase difference between the two optomechanical coupling rates, which breaks the time-reversal symmetry of the three-mode optomechanical system. Moreover, the three-mode optomechanical system can also be used as a three-port circulator for two optical modes and one mechanical mode, which we refer to as an optomechanical circulator. © 2015 American Physical Society.

Ling Q.,Anhui University of Science and Technology | Ling Q.,Xidian University | Ribeiro A.,University of Pennsylvania
IEEE Transactions on Signal Processing | Year: 2014

This paper develops the application of the alternating direction method of multipliers (ADMM) to optimize a dynamic objective function in a decentralized multi-agent system. At each time slot, agents in the network observe local functions and cooperate to track the optimal time-varying argument of the sum objective. This cooperation is based on maintaining local primal variables that estimate the value of the optimal argument and auxiliary dual variables that encourage proximity with neighboring estimates. Primal and dual variables are updated by an ADMM iteration that can be implemented in a distributed manner whereby local updates require access to local variables and the most recent primal variables from adjacent agents. For objective functions that are strongly convex and have Lipschitz continuous gradients, the distances between the primal and dual iterates to their corresponding time-varying optimal values are shown to converge to a steady state gap. This gap is explicitly characterized in terms of the condition number of the objective function, the condition number of the network that is defined as the ratio between the largest and smallest nonzero Laplacian eigenvalues, and a bound on the drifts of the optimal primal variables and the optimal gradients. Numerical experiments corroborate theoretical findings and show that the results also hold for non-differentiable and non-strongly convex primal objectives. © 2013 IEEE.

Deng L.,U.S. Food and Drug Administration | Luo M.,University of Maryland Institute for Bioscience and Biotechnology Research | Luo M.,Anhui University of Science and Technology | Velikovsky A.,University of Maryland Institute for Bioscience and Biotechnology Research | And 3 more authors.
Annual Review of Biophysics | Year: 2013

The adaptive immune system, which is based on highly diverse antigen receptors that are generated by somatic recombination, arose approximately 500 Mya at the dawn of vertebrate evolution. In jawed vertebrates, adaptive immunity is mediated by antibodies and T cell receptors (TCRs), which are composed of immunoglobulin (Ig) domains containing hypervariable loops that bind antigen. In striking contrast, the adaptive immune receptors of jawless vertebrates, termed variable lymphocyte receptors (VLRs), are constructed from leucine-rich repeat (LRR) modules. Structural studies of VLRs have shown that these LRR-based receptors bind antigens though their concave surface, in addition to a unique hypervariable loop in the C-terminal LRR capping module. These studies have revealed a remarkable example of convergent evolution in which jawless vertebrates adopted the LRR scaffold to recognize as broad a spectrum of antigens as the Ig-based antibodies and TCRs of jawed vertebrates, with altogether comparable affinity and specificity. Copyright © 2013 by Annual Reviews.

Wu L.,Anhui University of Science and Technology | Talke F.E.,University of California at San Diego
Microsystem Technologies | Year: 2011

In this paper, we model the depletion of lubricant from a disk surface subject to heating by a scanning laser in a heat assisted magnetic recording (HAMR) system. A multi-layer disk structure is used consisting of the substrate (either glass or aluminum), the CoFe based soft magnetic under- layer, a Ru based intermediate layer, a CoCrPt based recording layer, the diamond-like-carbon layer, and the lubricant film. The thickness and material properties of the different layers are shown to play an important role in the conduction of heat from the top layer to the bottom layer and, consequently, in the lubricant depletion process due to heating by a scanning laser. The results show that it is critical to include realistic multi-layer disk structures in HAMR lubricant depletion modeling. © 2011 Springer-Verlag.

Wang Z.,Nanjing Southeast University | Yu Y.,Anhui University of Science and Technology
IIE Transactions (Institute of Industrial Engineers) | Year: 2012

The optimal production control policy (i.e., the hedging point policy) for a single machine and single part-type manufacturing system for the case where the production surplus is accurately known has been reported in the literature. However, the production surplus is often observed inaccurately in practice. Ignoring this inaccuracy in using the optimal policy leads to not only non-robust situations but also high production costs. To consider the effect of the inaccurate observation, robustness of the production control policy is required. The robustness can be evaluated in terms of the difference between the production surplus trajectory under the policy with an inaccurate observation and the trajectory under the policy with an accurate production surplus (i.e., the hedging point policy). A difference of zero is the ideal case; however, this is generally impossible to achieve since the extent of the observation error is generally unknown. This article proposes a new robust production control policy that can give a small difference between the two trajectories. Compared with the hedging point policy, the proposed policy is more insensitive to production surplus inaccuracy in the neighborhood of the hedging point but responds more slowly to a failure of the machine. Simulation studies show that the proposed policy has a better robustness than the hedging point policy for cases where, just as in actual industrial practice, the machine failure time is much shorter than the up time of the machine. In these cases, with an increase in the observation error, the robustness of the proposed policy becomes increasingly better than that for the hedging point policy. © 2012 Taylor & Francis Group, LLC.

Ling Q.,Anhui University of Science and Technology | Tian Z.,Michigan Technological University
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings | Year: 2011

This paper considers the problem of finding sparse solutions from multiple measurement vectors (MMVs) with joint sparsity. The solutions share the same sparsity structure, and the locations of the common nonzero support contain important information of signal features. When the measurement vectors are collected from spatially distributed users, the issue of decentralized support detection arises. This paper develops a decentralized row-based Lasso (DR-Lasso) algorithm for the distributedMMVproblem. A penalty term on row-based total energy is introduced to enforce joint sparsity for the MMVs, and consensus constraints are formulated such that users can consent on the total energy, and hence the common nonzero support, in a decentralized manner. As an illustrative example, the problem of cooperative spectrum occupancy detection is solved in the context of wideband cognitive radio networks. © 2011 IEEE.

Migani A.,University of the Basque Country | Migani A.,Catalan Institute of Nanoscience and Nanotechnology | Mowbray D.J.,University of the Basque Country | Iacomino A.,University of the Basque Country | And 3 more authors.
Journal of the American Chemical Society | Year: 2013

Photocatalytic activity depends on the optimal alignment of electronic levels at the molecule-semiconductor interface. Establishing the level alignment experimentally is complicated by the uncertain chemical identity of the surface species. We address the assignment of the occupied and empty electronic levels for the prototypical photocatalytic system consisting of methanol on a rutile TiO2(110) surface. Using many-body quasiparticle (QP) techniques, we show that the frontier levels measured in UV photoelectron and two-photon photoemission spectroscopy experiments can be assigned to molecularly chemisorbed methanol rather than its dissociated product, the methoxy species. We find that the highest occupied molecular orbital of the methoxy species is much closer to the valence band maximum, suggesting why it is more photocatalytically active than the methanol molecule. We develop a general semiquantitative model for predicting many-body QP energies based on the electronic screening within the bulk, molecular, or vacuum regions of the wave functions at molecule-semiconductor interfaces. © 2013 American Chemical Society.

Tang Y.,CAS Shanghai Institute of Organic Chemistry | Li J.,Anhui University of Science and Technology | Zhu Y.,CAS Shanghai Institute of Organic Chemistry | Li Y.,CAS Shanghai Institute of Organic Chemistry | Yu B.,CAS Shanghai Institute of Organic Chemistry
Journal of the American Chemical Society | Year: 2013

Anomerization, which involves cleavage and formation of the anomeric C-O bond, is of fundamental importance in the carbohydrate chemistry. Herein, the unexpected gold(I)-catalyzed anomerization of glycosyl ortho-alkynylbenzoates has been studied in detail. Especially, crossover experiments in the presence of an exogenous isochromen-4-yl gold(I) complex confirm that the anomerization proceeds via the exocleavage mechanism, involving (surprisingly) the addition of the isochromen-4-yl gold(I) complex onto a sugar oxocarbenium (or dioxolenium) and an elimination of LAu+ from the vinyl gold(I) complex. The inhibitory effect of the exogenous isochromen-4-yl gold(I) complex when in stoichiometric amount on the anomerization has guided us to disclose an isochromen-4-yl gem-gold(I) complex, which is inactive in catalysis but in equilibrium with the monogold(I) complex and the LAu+ catalyst. The proposed key intermediate in the anomerization, a transient glycosyloxypyrylium species, is successfully trapped via a cycloaddition reaction with n-butyl vinyl ether as a dienophile. SN2-like substitution of the initially formed glycosyloxypyrylium intermediate has then been achieved to a large extent via charging with acceptors in an excess amount to lead to the corresponding glycosides in a stereoselective manner. © 2013 American Chemical Society.

Sojka D.K.,University of Washington | Tian Z.,Anhui University of Science and Technology | Tian Z.,Hefei National Laboratory for Physical science at Microscale | Yokoyama W.M.,University of Washington | Yokoyama W.M.,Howard Hughes Medical Institute
Seminars in Immunology | Year: 2014

Conventional NK cells are well characterized in the mouse spleen and circulate in the blood. Less well described are NK cells found in organs such as the liver, thymus, and uterus. Recently we identified a tissue-resident NK (trNK) cell population in the liver, suggesting a potential diversity of trNK cells in other organs. In this review we compare and contrast the similarities and differences among the subpopulations of NK and innate lymphoid cells to the trNK cells in the liver. © 2014 Elsevier Ltd.

Zhang X.,Yale University | Zou C.-L.,Yale University | Zou C.-L.,Anhui University of Science and Technology | Jiang L.,Yale University | Tang H.X.,Yale University
Physical Review Letters | Year: 2014

We realize a cavity magnon-microwave photon system in which a magnetic dipole interaction mediates strong coupling between the collective motion of a large number of spins in a ferrimagnet and the microwave field in a three-dimensional cavity. By scaling down the cavity size and increasing the number of spins, an ultrastrong coupling regime is achieved with a cooperativity reaching 12600. Interesting dynamic features including classical Rabi-like oscillation, magnetically induced transparency, and the Purcell effect are demonstrated in this highly versatile platform, highlighting its great potential for coherent information processing. © 2014 American Physical Society.

Ding G.-J.,Anhui University of Science and Technology | King S.F.,University of Southampton | Neder T.,University of Southampton
Journal of High Energy Physics | Year: 2014

Abstract: We perform a detailed analysis of Δ(6n2) family symmetry combined with a generalised CP symmetry in the lepton sector, breaking to different remnant symmetries Gν in the neutrino and Gl in the charged lepton sector, together with different remnant CP symmetries in each sector. We discuss the resulting mass and mixing predictions for Gν = Z2 with Gl = K4, Zp, p > 2 and Gν = K4 with Gl = Z2. All cases correspond to the preserved symmetry smaller than the full Klein symmetry, as in the semi-direct approach, leading to predictions which depend on a single undetermined real parameter, which mainly determines the reactor angle. We focus on five phenomenologically allowed cases for which we present the resulting predictions for the PMNS parameters as a function of n, as well as the predictions for neutrinoless double beta decay. © 2014, The Author(s).

Ding G.-J.,Anhui University of Science and Technology | Zhou Y.-L.,CAS Institute of High Energy Physics
Journal of High Energy Physics | Year: 2014

We provide a systematic and thorough exploration of the Δ(48) family symmetry and the consistent generalised CP symmetry. A model-independent analysis of the achievable lepton flavor mixing is performed by considering all the possible remnant symmetries in the neutrino and the charged lepton sectors. We find a new interesting mixing pattern in which both lepton mixing angles and CP phases are nontrivial functions of a single parameter θ. The value of θ can be fixed by the measured reactor mixing angle θ 13, and the excellent agreement with the present data can be achieved. A supersymmetric model based on Δ(48) family symmetry and generalised CP symmetry is constructed, and this new mixing pattern is exactly reproduced. © 2014 The Author(s).

Wu Z.,Anhui University of Science and Technology
Journal of Geophysical Research B: Solid Earth | Year: 2016

The composition of the Earth's lower mantle (LM) is critical in understanding the Earth's interior and dynamics. Previous reports on the composition of the LM are controversial. The composition of LM, constrained here using high-temperature and high-pressure data of the velocities and density of minerals from first-principles calculations, spans a large range: from pyrolite with ~15% ferropericlase (Fp) in weight (wt %) to perovskitic-rich composition with ~10wt % Fp. Any composition well constrained by preliminary reference Earth model (PREM) has a sufficient amount of Fp to exhibit the positive temperature dependence of VΦ (= Kρ) at the middle LM, leading to the insensitivity of VP to temperature. The depth at which VP is insensitive to temperature variation deepens significantly with increasing temperature because the spin transition in Fp has the positive Clapeyron slope (~17MPa/K). The Large Low Shear Velocity Provinces below Africa is estimated to be ~750K higher than the ambient mantle. © 2016. American Geophysical Union. All Rights Reserved.

Jiang H.-L.,Texas A&M University | Jiang H.-L.,Anhui University of Science and Technology | Feng D.,Texas A&M University | Wang K.,Texas A&M University | And 4 more authors.
Journal of the American Chemical Society | Year: 2013

A reaction between a ZrIV salt and a porphyrinic tetracarboxylic acid leads to a metal-organic framework (MOF) with two types of open channels, representing a MOF featuring a (4,8)-connected sqc net. The MOF remains intact in both boiling water and aqueous solutions with pH ranging from 1 to 11, a remarkably extensive pH range that a MOF can sustain. Given its exceptional stability and pH-dependent fluorescent intensity, the MOF can potentially be applied in fluorescent pH sensing. © 2013 American Chemical Society.

Luo K.,Anhui University of Science and Technology | Metzler R.,TU Munich
Journal of Chemical Physics | Year: 2010

Using Langevin dynamics simulations in three dimensions, we investigate the dynamics of polymer translocation into the regions between two parallel plane walls with separation R under a driving force F. Compared with an unconfined environment, the translocation dynamics is greatly changed due to the crowding effect of the partially translocated monomers. The translocation time τ initially decreases rapidly with increasing R and then saturates for larger R, and the confined environment leads to a nonuniversal dependence of τ on F. © 2010 American Institute of Physics.

Li Y.F.,CAS Institute of High Energy Physics | Liu S.-S.,Anhui University of Science and Technology
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2012

Light sterile neutrinos with masses at the sub-eV or eV scale are hinted by current experimental and cosmological data. Assuming the Majorana nature of these hypothetical particles, we discuss their effects in the neutrinoless double beta decay by exploring the implications of a vanishing effective Majorana neutrino mass 〈m〉ee. Allowed ranges of neutrino masses, mixing angles and Majorana CP-violating phases are illustrated in some instructive cases for both normal and inverted mass hierarchies of three active neutrinos. © 2011 Elsevier B.V.

Ding G.-J.,Anhui University of Science and Technology | Ding G.-J.,University of Wisconsin - Madison | Meloni D.,Third University of Rome
Nuclear Physics B | Year: 2012

We propose a new A4 model in which both the right-handed neutrinos and right-handed charged leptons transform as A4 singlets. We reproduce tri-bimaximal mixing pattern exactly although the A4 symmetry is broken completely at leading order in both the neutrino and charged lepton sectors. The charged lepton mass hierarchies are controlled by the spontaneous breaking of the flavor symmetry. The light neutrino spectrum is predicted to be of normal type and the lightest neutrino is massless at leading order. Although the reactor angle θ13 is expected to be of order λc2 from the next to leading order corrections, this model cannot be ruled out by current experimental data including the latest T2K results. Leptogenesis is realized via the resonant leptogenesis of the second and the third heavy right-handed neutrinos which are degenerate at leading order. The phenomenological consequences for lepton flavor violation are discussed in detail. © 2011 Elsevier B.V.

Lu P.,University of California at Santa Barbara | Gu Z.,University of California at Santa Barbara | Gu Z.,Anhui University of Science and Technology | Zakarian A.,University of California at Santa Barbara
Journal of the American Chemical Society | Year: 2013

A total synthesis of the unusual ent-kaurane maoecrystal V is described. The synthesis strategy features a counterintuitive early disconnection of the lactone subunit to a polycyclic enol ether intermediate in order to preserve the central tetrahydrofuran ring until the beginning stages of the synthesis. This strategy enables an application of C-H functionalization at the early phase of the synthesis during the construction of a dihydrobenzofuran intermediate. © 2013 American Chemical Society.

Wang R.,Anhui University of Science and Technology
Archives of environmental contamination and toxicology | Year: 2010

Thirty-three soil samples were collected from the Luling, Liuer, and Zhangji coal mines, in the Huaibei and Huainan areas, Anhui Province, China, in 2007. The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs), identified as priority pollutants by the US Environmental Protection Agency (EPA), were determined by gas chromatography-mass spectrometry (GC-MS). The sum of 16 US EPA PAHs ranged from 0.13 to 3.54 microg/g (dry weight basis) with a mean concentration of 0.84 microg/g. Among the three sampling sites selected around the coal mines, the site at the Luling coal mine revealed maximum concentration of PAHs, whereas minimum concentration was observed at the site at the Zhangji coal mine. In general, low-molecular-weight PAHs were predominant. The gob pile and coal preparation plant are the sources of PAHs pollution in surface soils in the vicinity of coal mines. The crops in rice paddies might adsorb some PAHs and reduce the PAHs content in soils from paddy fields. The vertical distribution of PAHs in two soil profiles indicates that PAHs contamination in soil profiles tends to occur high in the surface soils and markedly decreases with soil depth. For all depths, PAHs showed a similar distribution pattern, which is an indicator of a similar origin. The total B[a]P equivalent concentration (B[a]Peq) was found to be maximum at the Luling area, whereas it was minimum at Liuer zones.

Evans E.J.,Brigham Young University | Scott M.A.,Brigham Young University | Li X.,Anhui University of Science and Technology | Thomas D.C.,Brigham Young University
Computer Methods in Applied Mechanics and Engineering | Year: 2014

In this paper hierarchical analysis-suitable T-splines (HASTS) are developed. The resulting spaces are a superset of both analysis-suitable T-splines and hierarchical B-splines. The additional flexibility provided by the hierarchy of T-spline spaces results in simple, highly localized refinement algorithms which can be utilized in a design or analysis context. A detailed theoretical formulation is presented. Bézier extraction is extended to HASTS simplifying the implementation of HASTS in existing finite element codes. The behavior of a simple HASTS refinement algorithm is compared to the local refinement algorithm for analysis-suitable T-splines demonstrating the superior efficiency and locality of the HASTS algorithm. Finally, HASTS are utilized as a basis for adaptive isogeometric analysis. © 2014 Elsevier B.V.

Zhu L.-F.,Anhui University of Science and Technology
Journal of Physics: Conference Series | Year: 2010

The differential cross sections and apparent generalized oscillator strengths for the valence-shell excitations of the noble atoms of He, Ne, Ar, and Kr are reviewed. The asymptotical behaviors of the apparent generalized oscillator strengths show that the first Born approximation is more easily reached for the dipole-allowed transition than the dipole-forbidden one of 1S 0 → 1 S 0 type, in which the final state has the same term symbol of the initial state. Furthermore, the experiments reveal that the generalized oscillator strengths for the transitions, which are formed by the same electronic configuration through the intrachannel interaction such as (n - 1)p 5ns[3/2] 1 and (n - 1)p 5ns′[1/2] 1 of Ne (n=3), Ar (n=4), and Kr (n=5), are nearly parallel. This phenomenon is elucidated by the fact that the LS coupling singlet nature of the ground state selects the LS coupling singlet component from the excited wave function, i.e., the contribution from the singlet component in the excitation is dominant in the generalized oscillator strength. © 2010 IOP Publishing Ltd.

Wang S.,Anhui University of Science and Technology
Plasma Physics and Controlled Fusion | Year: 2012

Toroidal flows without momentum injection and the radial electric field in a tokamak plasma with impurity ions are theoretically investigated. It is found that the radial electric field is generated by the polarization current due to the time-varying diamagnetic drift, which is balanced by the polarization current due to the time-varying E × B drift in toroidal geometry. Toroidal flows are generated by the polarization current for fuel ions and impurity ions in opposite directions, following the toroidal angular momentum conservation law. The predicted toroidal flows are consistent with the experimental results related to the formation of an internal transport barrier. © 2012 IOP Publishing Ltd.

Li Y.,CAS Shanghai Institute of Organic Chemistry | Li Y.,Anhui University of Science and Technology | Sun J.,CAS Shanghai Institute of Organic Chemistry | Yu B.,CAS Shanghai Institute of Organic Chemistry
Organic Letters | Year: 2011

Glycosylation of the acid labile betulin and betulinic acid derivatives was achieved with glycosyl ortho-hexynylbenzoates as donors under the catalysis of PPh 3AuNTf 2; this enabled the efficient synthesis of lupane-type saponins, as exemplified by the total synthesis of the proposed betulinic acid trisaccharide from Bersama engleriana. © 2011 American Chemical Society.

Lin Z.,Anhui University | Jiang X.,Anhui University of Science and Technology
Computer Communications | Year: 2013

Many application protocols designed for the Internet architecture cannot operate well in challenged network environments. The communication in a delay-tolerant networking architecture, which is characterized by very long delay paths and frequent network partitions, basically relies on asynchronous, store-carry-forward message delivery. In most of the existing probabilistic routing approaches, messages are promptly forwarded to nodes that have higher delivery predictability values. We find that it is wise to wait till much better opportunities arise to minimize the communication cost without degrading the delivery ratio and latency. In this paper, a universal scheme, named E-Scheme, is proposed to improve most of the existing routing approaches based on the "probability to deliver" metrics. Providing that there are n opportunities, E-Scheme lets the first k opportunities go by (except when the node encounters the destination of the messages) and accepts the opportunities which are better than all of the k ones. We demonstrate that when k equals (n - 1)/e or (n-1)(n-2)/e, where e is the mathematical constant, E-Scheme improves performance of existing probabilistic routing approaches in single-copy and 2-copy scenarios, respectively. The performance of E-Scheme has been evaluated in personal delay-tolerant networks in both single-copy and 2-copy situation. © 2013 Elsevier B.V. All rights reserved.

Wang Z.,Anhui University | Wang Z.,Anhui University of Science and Technology
Journal of Luminescence | Year: 2011

The optical bistability and multistability in an Er3-doped ZrF4BaF2LaF3AlF3NaF optical fiber inside a ring cavity are investigated. The underlying mechanism shows some new characteristics that other schemes do not have. Thus, it may provide some new possibilities for technological applications in optoelectronics and quantum information science. © 2011 Elsevier B.V. All rights reserved.

Feng C.,Nanyang Technological University | Loh T.-P.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemical Science | Year: 2012

Copper-catalyzed olefinic trifluoromethylation and oxytrifluoromethylation of enamides is reported. The direct olefinic C-H trifluoromethylation constitutes an efficient method for the stereoselective synthesis of β-trifluoromethyl substituted enamides. © 2012 The Royal Society of Chemistry.

Wang J.-R.,Anhui University of Science and Technology | Liu G.-Z.,Max Planck Institute For Physik Komplexer Systeme
New Journal of Physics | Year: 2012

There is an interesting proposal that the long-range Coulomb interaction in suspended graphene can generate a dynamical gap, which leads to a semimetal-insulator phase transition. We revisit this problem by solving the self-consistent Dyson-Schwinger equations of wave function renormalization and fermion gap. In order to satisfy the Ward identity, a suitable vertex function is introduced. The impact of singular velocity renormalization and that ofdynamical screening on gap generation are both included in this formalism, and prove to be very important. We obtain a critical interaction strength, 3.2 < α c < 3.3, which is larger than the physical value α = 2.16 for suspended graphene. It therefore turns out that suspended graphene is a semimetal, rather than an insulator, at zero temperature. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

Ling Q.,Anhui University of Science and Technology | Tian Z.,Michigan Technological University
IEEE Transactions on Signal Processing | Year: 2010

This paper develops an optimal decentralized algorithm for sparse signal recovery and demonstrates its application in monitoring localized phenomena using energy-constrained large-scale wireless sensor networks. Capitalizing on the spatial sparsity of localized phenomena, compressive data collection is enforced by turning off a fraction of sensors using a simple random node sleeping strategy, which conserves sensing energy and prolongs network lifetime. In the absence of a fusion center, sparse signal recovery via decentralized in-network processing is developed, based on a consensus optimization formulation and the alternating direction method of multipliers. In the proposed algorithm, each active sensor monitors and recovers its local region only, collaborates with its neighboring active sensors through low-power one-hop communication, and iteratively improves the local estimates until reaching the global optimum. Because each sensor monitors the local region rather than the entire large field, the iterative algorithm converges fast, in addition to being scalable in terms of transmission and computation costs. Further, through collaboration, the sensing performance is globally optimal and attains a high spatial resolution commensurate with the node density of the original network containing both active and inactive sensors. Simulations demonstrate the performance of the proposed approach. © 2010 IEEE.

Zhang Z.,Anhui University of Science and Technology
Advances in Experimental Medicine and Biology | Year: 2015

Large biomolecules are involved in many important biological processes. It would be difficult to use large-scale atomistic molecular dynamics (MD) simulations to study the functional motions of these systems because of the computational expense. Therefore various coarse-grained (CG) approaches have attracted rapidly growing interest, which enable simulations of large biomolecules over longer effective timescales than all-atom MD simulations. The first issue in CG modeling is to construct CG maps from atomic structures. In this chapter, we review the recent development of a novel and systematic method for constructing CG representations of arbitrarily complex biomolecules, in order to preserve large-scale and functionally relevant essential dynamics (ED) at the CG level. In this ED-CG scheme, the essential dynamics can be characterized by principal component analysis (PCA) on a structural ensemble, or elastic network model (ENM) of a single atomic structure. Validation and applications of the method cover various biological systems, such as multi-domain proteins, protein complexes, and even biomolecular machines. The results demonstrate that the ED-CG method may serve as a very useful tool for identifying functional dynamics of large biomolecules at the CG level. © 2015 Shanghai Jiao Tong University Press, Shanghai and Springer Science+Business Media Dordrecht.

Feng C.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Angewandte Chemie - International Edition | Year: 2014

The rhodium(III)-catalyzed ortho C-H alkynylation of non-electronically activated arenes is disclosed. This process features a straightforward and highly effective protocol for the synthesis of functionalized alkynes and represents the first example of merging a hypervalent iodine reagent with rhodium(III) catalysis. Notably, this reaction proceeds at room temperature, tolerates a variety of functional groups, and more importantly, exhibits high selectivity for monoalkynylation. Hot rhod: A rhodium-catalyzed, electronically reversed Sonogashira reaction between unbiased arenes and the hypervalent iodine reagent 1 proceeds through C-H activation. This reaction displays excellent functional-group tolerance and high efficiency, and thus opens a new synthetic pathway to access functionalized alkynes. Cp*=C5Me5, DCE=1,2-dichloroethane, Piv=pivaloyl, TIPS=triisopropylsilyl. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Qian J.,Anhui University of Science and Technology
Journal of Information and Computational Science | Year: 2013

Almost all quantum codes are constructed from linear codes over finite fields. Few people constructed quantum codes from linear codes over finite rings. In this work, we present a new method of constructing quantum error-correcting codes from cyclic codes over finite ring F2 + vF2. The advantage of this ring R = F2 + vF2 is mainly due to the fact that every ideal of Rn = R[x]/ is principal. Therefore, we can construct quantum codes from cyclic codes over F2 + vF2 for arbitrary length n. Copyright © 2013 Binary Information Press.

Abbas A.,Nanyang Technological University | Xing B.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology | Loh T.-P.,Nanyang Technological University
Angewandte Chemie - International Edition | Year: 2014

In this study, a remarkably simple and direct strategy has been successfully developed to selectively label target cysteine residues in fully unprotected peptides and proteins. The strategy is based on the reaction between allenamides and the cysteine thiol, and proceeds swiftly in aqueous medium with excellent selectivity and quantitative conversion, thus forming a stable and irreversible conjugate. The combined simplicity and mildness of the process project allenamide as robust and versatile handles to target cysteines and has potential use in biological systems. Additionally, fluorescent-labeling studies demonstrated that the installation of a C-terminal allenamide moiety onto various molecules of interest may supply a new methodology towards the site-specific labeling of cysteine-containing proteins. Such a new labeling strategy may thus open a window for its application in the field of life sciences. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Devert A.,Anhui University of Science and Technology | Bredeche N.,University Paris - Sud | Schoenauer M.,University Paris - Sud
IEEE Transactions on Evolutionary Computation | Year: 2011

Most works in multicellular artificial ontogeny solve the halting problem by arbitrarily limiting the number of iterations of the developmental process. Hence, the trajectory of the developing organism in the phenotypic space is only required to come close to an accurate solution during a very short developmental period. Because of the well-known opportunism of evolution, there is indeed no reason for the organism to remain close to a good solution in other situations: if the development is continued after the limiting bound; if the environment is perturbed by some noise during the development; if the development takes place in different physical conditions. In order to increase the robustness of the solution against such hazards, a new stopping criterion for the developmental process is proposed, based on the stability of some internal energy of the organism during its development. Such adaptive stopping criterion biases evolution toward solutions in which robustness is an intrinsic property. Experimental results on different French flag problems demonstrate that enforcing stable developmental process makes it possible to produce solutions that not only accurately approximate the target shape, but also demonstrate near-perfect self-healing properties, as well as excellent generalization capabilities. © 2011 IEEE.

Liu Z.,CAS Ningbo Institute of Material Technology and Engineering | Zhou X.,CAS Ningbo Institute of Material Technology and Engineering | Qian Y.,Anhui University of Science and Technology
Advanced Materials | Year: 2010

Carbon nanomaterials have advanced rapidly over the last two decades and are among the most promising materials that have already changed and will keep on changing human life. Development of synthetic methodologies for these materials, therefore, has been one of the most important subjects of carbon nanoscience and nanotechnology, and forms the basis for investigating the physicochemical properties and applications of carbon nanomaterials. In this Research News article, several synthetic strategies, including solvothermal reduction, solvothermal pyrolysis, hydrothermal carbonization, and soft-chemical exfoliation are specifically discussed and highlighted, which have been developed for the synthesis of novel carbon nanomaterials over the last decade. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA,.

Kurahashi M.,Japan National Institute of Materials Science | Sun X.,Anhui University of Science and Technology | Yamauchi Y.,Japan National Institute of Materials Science
Physical Review B - Condensed Matter and Materials Physics | Year: 2010

We report experimental evidence that hydrogen termination largely enhances the spin polarization of an Fe3 O4 (100) surface. An in situ prepared Fe 3O4 (100) /MgO (100) film surface was exposed to atomic hydrogen and its surface spin polarization (P) was monitored with a spin-polarized metastable helium-atom beam under external magnetic fields of 0-5 T. The spin asymmetry at the high-energy cutoff, which reflects P at the Fermi level of the topmost surface, increased from <5% to >50% at 298 K by H adsorption. The enhancement in P was found to be consistent with the H-induced change in the surface electronic states predicted by a density-functional theory calculation. © 2010 The American Physical Society.

Zhang J.,University of Connecticut | Yan R.,Nanjing Southeast University | Gao R.X.,University of Connecticut | Feng Z.,Anhui University of Science and Technology
Mechanical Systems and Signal Processing | Year: 2010

Ensemble empirical mode decomposition (EEMD) is a newly developed method aimed at eliminating mode mixing present in the original empirical mode decomposition (EMD). To evaluate the performance of this new method, this paper investigates the effect of two parameters pertinent to EEMD: the amplitude of added white noise and the number of ensemble trials. A test signal with mode mixing that mimics realistic bearing vibration signals measured on a bearing test bed was developed to enable quantitative evaluation of the EEMD and provide guidance on how to choose the two parameters appropriately for bearing signal decomposition. Subsequently, a modified EEMD (MEEMD) method is proposed to reduce the computational cost of the original EEMD method as well as improving its performance. Numerical evaluation and systematic study using vibration data measured on an experimental bearing test bed verified the effectiveness and computational efficiency of the proposed MEEMD method for bearing defect diagnosis. © 2010 Elsevier Ltd. All rights reserved.

Chen H.T.,University of Hong Kong | Soh A.K.,Sunway University | Ni Y.,Anhui University of Science and Technology
Acta Mechanica | Year: 2014

The flexoelectric effect which is defined as the coupling between strain gradient and polarization has long been neglected because it is insignificant in bulk ferroelectrics. However, at nanoscale, the strain gradient can be dramatically increased leading to giant flexoelectric effects. In the present study, the flexoelectric effects in epitaxial nano thin films of a 180° multi-domain structure, which are subjected to a compressive in-plane misfit strain, are investigated by the phase field method. Unlike the case of a single domain structure where the strain gradient is mainly attributed to the formation of dislocation which relaxes the misfit strain, in a multi-domain structure, it is attributed to many factors, such as surface and interface effects, misfit relaxation and domain wall structure. The results obtained show that relatively large flexoelectricity-induced electric fields are produced near the domain wall region. The induced field will not only influence the domain structure of the thin film, but also the hysteresis loops when it is under an applied electric field. © 2014 Springer-Verlag Wien.

Hui G.,Anhui University of Science and Technology
Advanced Materials Research | Year: 2013

Based of the technology of CAD VBA and Access database, the management program of water quality monitoring information in mining subsidence area is developed; it mainly includes functions of attribute query, attribute edition, visualization of water monitoring point. The table structure in monitoring point attribute database is designed, and problem of dynamic linkage between drawing data and attribute data is solved. The key code about them is given in the paper. The program can provide some decision support for reasonable use of water resources and environment protection in the mine area, and will promote the more scientific and sustainable development of mine area. © (2013) Trans Tech Publications, Switzerland.

Shi D.-M.,Bohai University | Wang B.-H.,Anhui University of Science and Technology
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2013

Game theory is introduced to simulate the complicated interaction relations among the conflicting pedestrians in a pedestrian flow system, which is defined on a square lattice with the parallel update rule. Modified on the traditional lattice gas model, each pedestrian can move to not only an empty site, but also an occupied site. It is found that each individual chooses its neighbor randomly and occupies the site with the probability W(x→y)=11+exp[-(P x-Ux)/κ], where Px is the x's payoff representing his personal energy, and Ux is the average payoff of its neighborhood indicating the potential well energy if he stays. Two types of pedestrians are considered, and they interact with their neighbors following the payoff matrix of snowdrift game theory. The cost-to-benefit ratio r=c/(2b-c) (where b is the perfect payoff and c is the labor cost) represents the fear index of the pedestrians in this model. It is found that there exists a moderate value of r leading to the shortest escape time, and the situation for large values of r is better than that for small ones in general. In addition, the pedestrian flow system always arrives at a consistent state in which the two types of walkers have the same number and evolve by the same law irrespectively of the parameters, which can be interpreted as the self-organization effect of pedestrian flow. It is also proven that the time point of the onset of the steady state is unrelated to the scale of the pedestrians and the square lattice. Meanwhile, the system exhibits different dynamics before reaching the consistent state: the number of the two types of walkers oscillates when P C>0.5 (i.e., probability to change the present strategy), while no oscillation happens for PC≤0.5. Finally, it is shown that a smaller density of pedestrians ρ induces a shorter average escape time. © 2013 American Physical Society.

Liu G.-Q.,CAS Institute of Physics | Po H.C.,Chinese University of Hong Kong | Du J.,Anhui University of Science and Technology | Liu R.-B.,Chinese University of Hong Kong | Pan X.-Y.,CAS Institute of Physics
Nature Communications | Year: 2013

Realistic quantum computing is subject to noise. Therefore, an important frontier in quantum computing is to implement noise-resilient quantum control over qubits. At the same time, dynamical decoupling can protect the coherence of qubits. Here we demonstrate non-trivial quantum evolution steered by dynamical decoupling control, which simultaneously suppresses noise effects. We design and implement a self-protected controlled-NOT gate on the electron spin of a nitrogen-vacancy centre and a nearby carbon-13 nuclear spin in diamond at room temperature, by employing an engineered dynamical decoupling control on the electron spin. Final state fidelity of 0.91(1) is observed in preparation of a Bell state using the gate. At the same time, the qubit coherence time is elongated at least 30 fold. The design scheme does not require the dynamical decoupling control to commute with the qubit interaction and therefore works for general qubit systems. This work marks a step towards implementing realistic quantum computing systems. © 2013 Macmillan Publishers Limited. All rights reserved.

Yu S.Y.,Guangzhou University | Qi R.,Guangzhou University | Zhao H.,Anhui University of Science and Technology
Molecular Biology Reports | Year: 2013

Podocyte impairment is a key pathogenic even in the initiation and development of glomerular diseases associated with proteinuria. The type 2 diabetic patients is characterized by progressive increases in albuminuria which are associated with the development of characteristic histopathological features. Losartan had a benefit in decreasing albuminuria in type 2 diabetic patients,suggesting that losartan may have another effect other than blockade of the traditional renin-angiotensin system (RAS). However, the mechanism has remained undetermined. Glucose transporter 1 (GLUT1) is the predominant basal glucose transporter. In the kidney, GLUT1 was overexpressed predominantly in glomerular mesangial cells and in small vessels, rather than in podocytes. The increased glomerular GLUT1 mimicked diabetes-induced glomerular GLUT1 expression. In this study, we hypothesized that increased GLUT1 expression induced by angiotensinII (AngII) contributes to the progression of podocytes injury, losartan can block the effect of AngII and protect podocytes via stabilizing the expression of GLUT1, our results strongly suggest that losartan has a direct and protective effect on podocytes. This represents a novel mechanism by which losartan may protect podocyte from apoptotic death and improve podocyte function via stabilizing the expression of GLUT1. This finding underlines the crucial role of GLUT1 in the pathogenesis of podocyte injury and proteinuria. © 2013 Springer Science+Business Media Dordrecht.

Zhu M.-K.,Nanyang Technological University | Chen Y.-C.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology | Loh T.-P.,Nanyang Technological University
Chemistry - A European Journal | Year: 2013

Metal-free synthesis: Diamination of alkenes by using phenylhydrazine and azodicarboxylates could be achieved in a one-pot manner under very mild conditions (see scheme; Boc=tert-butoxycarbonyl). This process works with the assistance of acetic acid by means of a radical mechanism and displays a high trans selectivity when cycloalkene substrates were used in the reaction. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Pei H.,CAS Shanghai Institutes for Biological Sciences | Yao Y.,CAS Shanghai Institutes for Biological Sciences | Yang Y.,CAS Shanghai Institutes for Biological Sciences | Liao K.,CAS Shanghai Institutes for Biological Sciences | And 2 more authors.
Cell Death and Differentiation | Year: 2011

Krüppel-like factors (KLFs) as a family of zinc-finger transcription factors involve in the regulation of many physiological processes. In these studies, KLF9 was characterized for its role in adipogenesis. The expression of KLF9 was markedly upregulated during the middle stage of 3T3-L1 adipocyte differentiation, and inhibition of KLF9 by RNAi impaired adipogenesis. Using promoter deletion and mutation analysis, we identified two KLF9-binding sites within the 0.6-kb region of the PPARγ2 proximal promoter, indicating that KLF9 interacts with the PPARγ2 promoter. Furthermore, we found that KLF9 could synergistically activate PPARγ2 promoter by directly interacting with C/EBPα. In addition, overexpression of PPARγ2 rescued the impairment of adipocyte differentiation induced by KLF9 knockdown, which supports that PPARγ2 is a downstream target of KLF9. Collectively, our results indicate KLF9 as a key pro-adipogenic transcription factor through regulation of PPARγ2 expression with C/EBPα at the middle stage of adipogenesis. © 2011 Macmillan Publishers Limited All rights reserved.

Pires R.,University of Heidelberg | Ulmanis J.,University of Heidelberg | Hafner S.,University of Heidelberg | Repp M.,University of Heidelberg | And 4 more authors.
Physical Review Letters | Year: 2014

We observe two consecutive heteronuclear Efimov resonances in an ultracold Li-Cs mixture by measuring three-body loss coefficients as a function of magnetic field near a Feshbach resonance. The first resonance is detected at a scattering length of a-(0)=-320(10)a0, corresponding to ∼7(∼3) times the Li-Cs (Cs-Cs) van der Waals range. The second resonance appears at 5.8(1.0)a-(0), close to the unitarity-limited regime at the sample temperature of 450 nK. Indication of a third resonance is found in the atom loss spectra. The scaling of the resonance positions is close to the predicted universal scaling value of 4.9 for zero temperature. Deviations from universality might be caused by finite-range and temperature effects, as well as magnetic field-dependent Cs-Cs interactions. © 2014 American Physical Society.

Qu Q.,Anhui University of Science and Technology
Journal of Software | Year: 2012

Data Envelopment Analysis (DEA) has becoming more and more important in evaluating the performance of homogenous Decision Making Units (DMUs). Cross efficiency evaluation method, a DEA extension technique, can be utilized to identify efficient DMUs and to rank DMUs in a peer appraisal mode, instead of a pure self-evaluation of traditional DEA models. Traditionally, the ultimate cross efficiency is determined based on the average assumption. However it cannot ensure this result contains the most information of the cross-efficiency matrix (CEM). In the current paper, we use principal component analysis (PCA) to determine the ultimate cross-efficiency of each DMU and then rank them. Compared with the tradition average cross efficiency evaluation method, the method proposed in this paper can contain the most of the information of CEM. Finally, an empirical example is illustrated to examine the validity of the proposed method. © 2012 ACADEMY PUBLISHER.

Zhang J.,Nanyang Technological University | Loh T.-P.,Nanyang Technological University | Loh T.-P.,Anhui University of Science and Technology
Chemical Communications | Year: 2012

Ruthenium- and rhodium-catalyzed direct oxidative cross-coupling reactions of acrylamides with alkenes were developed. These methods provide an efficient route for the synthesis of (Z,E)-dienamides in excellent yields with good stereoselectivity. The catalytic systems allowed oxidative olefination of a wide range of alkenes bearing different functional groups, such as CO2R, COMe, SO2Ph, aryl, CONHBn, CN, PO(OEt)2, as well as Weinreb amide. © 2012 The Royal Society of Chemistry.