Liaoning Normal University
Huanghe, China

Liaoning Normal University is a teacher training university in Dalian, Liaoning Province, China under the provincial government. Established in 1951 the university is primarily responsible for educating teachers to teach in high schools around the province, though non-teacher training courses are offered. Wikipedia.

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Lei Z.,National University of Singapore | Bai D.,Liaoning Normal University | Zhao X.S.,National University of Singapore
Microporous and Mesoporous Materials | Year: 2012

Nitrogen-containing carbon composite materials composed of mesoporous carbon CMK-5 and carbon nanotubes (CNTs) were prepared by the chemical vapor deposition method with Fe(NO3)3-impregnated SBA-15 as template and pyridine as the carbon precursor. The Fe nanoparticles confined in the channels of SBA-15 induced the formation of mesoporous carbon characteristic of CMK-5, whereas Fe particles homogeneously dispersed on the external surface of SBA-15 served as catalysts for CNTs growth. The contents of CNTs, the N doping level and the microstruture of the carbon composite were closely related to the initial Fe/Si atomic ratio in SBA-15 template. Incorporation of CNTs in the composite was found to substantially reduce the electric resistance, leading to the composite materials exhibiting excellent rate-performance. A maximum specific capacitance of 208 F/g and a power density of 10 kW/kg were achieved in 6.0 mol/L KOH aqueous electrolyte when these carbon composites were applied as supercapacitor electrodes. Moreover, the composite electrode also exhibited good electrochemical stability with no capacitance loss after 1000 cycles of galvanostatic charge-discharge process. © 2011 Elsevier Inc. All rights reserved.

Cai R.-G.,CAS Institute of Theoretical Physics | Tuo Z.-L.,CAS Institute of Theoretical Physics | Wu Y.-B.,Liaoning Normal University | Zhao Y.-Y.,Liaoning Normal University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2012

The difference between the vacuum energy of quantum fields in Minkowski space and in a Friedmann-Robertson-Walker universe might be related to the observed dark energy. The vacuum energy of the Veneziano ghost field introduced to solve the U(1) A problem in QCD is of the form H+O(H2). Based on this, we study the dynamical evolution of a phenomenological dark energy model whose energy density is of the form αH+βH2. In this model, the universe approaches a deSitter phase at late times. We fit the model with current observational data, including SnIa, BAO, CMB, BBN, the Hubble parameter, and the growth rate of matter perturbation. It shows that the universe begins to accelerate at redshift z∼0.75, and this model is consistent with current data. In particular, this model fits the data of the growth factor well as the ΛCDM model. © 2012 American Physical Society.

Xie J.-J.,CAS Lanzhou Institute of Modern Physics | Xie J.-J.,CAS Institute of Theoretical Physics | Dai L.-R.,Liaoning Normal University | Oset E.,CAS Lanzhou Institute of Modern Physics | Oset E.,University of Valencia
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

The D0 decay into Ks0 and a scalar resonance, f0(500), f0(980), a0(980), are studied obtaining the scalar resonances from final state interaction of a pair of mesons produced in a first step in the D0 decay into Ks0 and the pair of pseudoscalar mesons. This weak decay is very appropriate for this kind of study because it allows to produce the three resonances in the same decay in a process that is Cabibbo-allowed, hence the rates obtained are large compared to those of B-0 decays into J/ψ and a scalar meson that have at least one Cabibbo-suppressed vertex. Concretely the a0(980) production is Cabibbo-allowed here, while it cannot be seen in the B-s0 decay into J/ψa0(980) and is doubly Cabibbo-suppressed in the B-0 decay into J/ψa0(980) and has not been identified there. The fact that the three resonances can be seen in the same reaction, because there is no isospin conservation in the weak decays, offers a unique opportunity to test the ideas of the chiral unitary approach where these resonances are produced from the interaction of pairs of pseudoscalar mesons. © 2015 The Authors.

Chen D.,Liaoning Normal University | Li X.,CAS Dalian Institute of Chemical Physics
Journal of Power Sources | Year: 2014

Sulfonated poly(ether ether ketone) (C-SPEEK) membranes with pendent carboxylic acid groups are prepared and first investigated for vanadium flow battery (VFB) application. The introduction of carboxylic acid groups can effectively improve the ion conductivities of C-SPEEK membranes, while, keep their ion selectivities. The prepared C-SPEEK membranes exhibit excellent performance under VFB operating condition. VFB single cell assembled with C-SPEEK-50 membranes shows much higher energy efficiency (85% Vs 82%) and columbic efficiency (97.3% Vs 94.6%) than that assembled with Nafion 115. The membrane keeps a stable performance after more than 180 cycles charge-discharge test, showing good stability. © 2013 Elsevier B.V. All rights reserved.

Yue C.-X.,Liaoning Normal University | Shi Q.-Y.,Liaoning Normal University | Hua T.,Liaoning Normal University
Nuclear Physics B | Year: 2013

Taking into account of the constraints on the relevant parameters from the muon anomalous magnetic moment, we consider the contributions of the vector bileptons V± and U±± predicted by the reduced minimal 331 model to the Higgs decay channels h→γγ and Zγ. Our numerical results show that the vector bileptons can enhance the partial width Γ(h→γγ), while reduce the partial width Γ(h→Zγ), which are anti-correlated. With reasonable values of the relevant free parameters, the vector bileptons can explain the LHC data for the γγ signal. If the CMS data persists, the values of the free parameters λ2 and λ3 should be severe constrained. © 2013 Elsevier B.V.

Gong L.I.-D.,Liaoning Normal University | Yang Z.-Z.,Liaoning Normal University
Journal of Computational Chemistry | Year: 2010

Based on the molecular face (MF) theory, the molecular face surface area (MFSA) and molecular face volume (MFV) are defined. For a variety of organic molecules and several inorganic molecules, the MFSA and MFV have been studied and calculated in terms of an algorithm of our own via the Matlab package. The MFV shows a very good linear relationship with the experimentally measured critical molar volume. It is also found that the MFSA and MFV have significant linear correlations with those of the commonly used hard-sphere model and the electron density isosurface. © 2010 Wiley Periodicals, Inc.

Structures, binding energies, and vibrational frequencies of (NH 3)n (n=2-5) isomers and dynamical properties of liquid ammonia have been explored using a transferable intermolecular potential eight point model including fluctuating charges and flexible body based on a combination of the atom-bond electronegativity equalization and molecular (ABEEM) mechanics (ABEEM ammonia- 8P) in this paper. The important feature of this model is to divide the charge sites of one ammonia molecule into eight points region containing four atoms, three σ bonds, and a lone pair, and allows the charges in system to fluctuate responding to the ambient environment. Due to the explicit descriptions of charges and special treatment of hydrogen bonds, the results of equilibrium geometries, dipole moments, cluster interaction energies, vibrational frequencies for the gas phase of small ammonia clusters, and radial distribution function for liquid ammonia calculated with the ABEEM ammonia- 8P potential model are in good agreement with those measured by available experiments and those obtained from high level ab initio calculations. The properties of ammonia dimer are studied in detail involving the structure and one-dimensional, two-dimensional potential energy surface. As for interaction energies, the root mean square deviation is 0.27 kcal/mol, and the linear correlation coefficient reaches 0.994. © 2010 American Institute of Physics.

The microscopic mechanisms of ion hydration and ion selectivity in biomolecular systems are long-standing research topics, in which the difficulty is how to reasonably and accurately describe the ion-water and ion-biomolecule interactions. This paper summarizes the development and applications of the atom-bond electronegativity equalization fluctuating charge force field model, ABEEM/MM, in the investigations of ion hydration, metalloproteins and ion-DNA bases systems. Based on high-level quantum chemistry calculations, the parameters were optimized and the molecular potential functions were constructed and applied to studies of structures, activities, energetics, and thermodynamic and kinetic properties of these ion-containing systems. The results show that the performance of ABEEM/MM is generally better than that of the common force fields, and its accuracy can reach or approach that of the high-level ab initio MP2 method. These studies provide a solid basis for further investigations of ion selectivity in biomolecular systems, the structures and properties of metalloproteins and other related ion-containing systems. © 2012 Science China Press and Springer-Verlag Berlin Heidelberg.

Chen D.,Liaoning Normal University
Journal of Applied Polymer Science | Year: 2013

Alternating deposition of oppositely charged polyelectrolyte complexes (PECs) on inorganic-organic composite membranes can efficiently overcome the drawback of microcracks induced by inorganic particles. Different bilayers of Poly (diallyldimethylammonium, chloride)/sulfonated poly(ether ether ketone) (PDDA/SPEEK) were first deposited on the charged silicon composite with hydrolyzed polyacrylonitrile (PAN-H) support and evaluated for solvent resistant nanofiltration membranes (SRNF) application. The morphology of the membranes was studied in detail via SEM and AFM. Because of Donnan exclusion, the multilayered PEC silicon composite membranes showed very high retentions up to 99% for negatively charged solutes (Rose Bengal (RB), 1017 Da) in the pressure driven filtration of isopropanol (IPA) solutions. For the first time, PEC-based silicon composite membranes were also applied in the filtration of organic solvents, where they were found to combine a remarkable stability in polar solvents with high fluxes and retentions. Compared with silicon composite membranes, the introduction of multilayered PDDA/SPEEK can efficiently improve the membrane performance and overcome the drawback induced by inorganic fillers. PEC-based silicon composite membranes thus show excellent prospective use in SRNF. Copyright © 2013 Wiley Periodicals, Inc.

Yue C.-X.,Liaoning Normal University | Zhou J.-R.,Liaoning Normal University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2016

Considering the constraints on the lepton flavor violating (LFV) couplings of the new gauge boson Z′ to ordinary leptons from the experimental upper limit for the LFV process →3′, we calculate the contributions of Z′ to the LFV decays V→ij with V{φ,J/Ψ,Ψ(2S),(n)} and τ→μ(e)φ in the context of several Z′ models. We find that all Z′ models considered in this paper can produce significant contributions to these decay processes and make the value of the branching ratio Br(τ→eφ) above its experimental upper limit. The experimental upper limit of τ→eφ can give more severe constraints on these Z′ models than those given by the rare decay process τ→3e. © 2016 American Physical Society.

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