Zhang J.-E.,Hubei Normal University
Advances in Mathematical Physics | Year: 2017
Memristive regulatory-type networks are recently emerging as a potential successor to traditional complementary resistive switch models. Qualitative analysis is useful in designing and synthesizing memristive regulatory-type networks. In this paper, we propose several succinct criteria to ensure global asymptotic stability and global asymptotic synchronization for a general class of memristive regulatory-type networks. The experimental simulations also show the performance of theoretical results. © 2017 Jin-E Zhang.
Yi L.-G.,Hubei Normal University
Computer Networks | Year: 2017
Small cells, specific femtocells aim to improve throughput and customer experience indoors, which prospectively develop into an indispensable part to complement macrocells. Since network operators progressively consider ecological and economical sustainable development, energy-saving and interference-free have grown to be crucial challenges for “green” femtocells, especially under ultra-dense deployment. To this end, we introduce coordinated multi-point (CoMP) femto-base stations (FBSs) to exploit intra-femto interference and multiple-input single-output beamforming in cognitive underlay to mitigate cross-tier interference, integrated with another key effort to best conserve overall FBSs power. It is formulated as a quasi mixed-integer convex optimization problem, decomposed and carried out separately via innovative transformations. A novel FBSs CoMP-selecting scheme, sensitive to femto-user traffic rate, is proposed to rapidly obtain the effective solution to fundamental CoMP beamforming issue. Furthermore, a policy of diminishing the CoMP set by deactivating feasible no-load FBSs to snooze, is proposed to actually minimize entire power consumption, wherein FBSs static, dynamic and backhauling power is jointly evaluated by accordingly proposed two hierarchical iterative algorithms. Network-level simulations under practical configurations, in contrast to prior work, demonstrate the proposals can achieve a proper tradeoff between retaining significant energy-efficient FBSs operation and assuring preferable quality of consumers experience. © 2017 Elsevier B.V.
Zhang J.-E.,Hubei Normal University
Mathematical Problems in Engineering | Year: 2017
We investigate associative memories for memristive neural networks with deviating argument. Firstly, the existence and uniqueness of the solution for memristive neural networks with deviating argument are discussed. Next, some sufficient conditions for this class of neural networks to possess invariant manifolds are obtained. In addition, a global exponential stability criterion is presented. Then, analysis and design of autoassociative memories and heteroassociative memories for memristive neural networks with deviating argument are formulated, respectively. Finally, several numerical examples are given to demonstrate the effectiveness of the obtained results. © 2017 Jin-E Zhang.
Huang J.,Hubei Normal University
Procedia Engineering | Year: 2017
To solve the hazardous goods transportation equipment state real-time monitoring and control system with TMS320F2812 of TI company as the core, through the shaping of the sensor into the alcohol gas signal, filtering, amplification, a / D conversion, A / D conversion using F2812 comes with 12 bit A / D converter, continuous sampling signal monitoring gas concentration change and through the acquisition of temperature and humidity signal, the gas concentration data were temperature and humidity compensation, accurate measurement, calibration gas data can be secondary sound and light alarm, and the MAX232 and PC data transfer, at any time to check and call history. Good monitoring and control to make the system more stable. System mainly includes sensor for gas detection, temperature detection pass, humidity sensor, signal conversion and processing unit, A / D conversion circuit, sound and light alarm unit, RS232 communication module, the battery monitoring unit, a gas pump control unit. DSP main program using modular programming, completed the DSP initialization of the main program module, real-time communication with the PC module and system function module test program design. Laboratory research on gas monitoring and control system scheme is designed in this paper for tankers physical model. and on this basis, focusing on the completion of the core part of the control system in the control card design and implementation. This system can realize the monitoring of the whole process of leakage of hazardous goods transport equipment, once dangerous goods transport vehicles of hazardous chemicals spill occurred, the system can real-time detection to the leakage and alarm, the modern crisis of goods logistics provides a security solution. © 2017 Published by Elsevier Ltd.
Chen Y.,Hubei Normal University
9th International Conference on Advanced Computational Intelligence, ICACI 2017 | Year: 2017
For any complex square matrix A, this paper characterizes the invertibility and group inverse of the combinations P = a1 PR(A) + a2 PR(A∗) +a3 PR(A) PR(A∗) +a4 PR(A∗) PR(A) by M-C-S decomposition of A. Necessary and sufficient conditions of the invertibility and its inverse are presented completely. Also, we characterize the group inverse and give an expression for P# when P is group invertible. © 2017 IEEE.
Rao Y.,Hubei Normal University |
Yin G.,Hubei Normal University
Organic and Biomolecular Chemistry | Year: 2013
A simple and efficient method for the synthesis of functionalized di-aromatic ring-fused 2,8-dioxabicyclo[3.3.1]nonane derivatives catalyzed by silver triflate from easily available 2-hydroxychalcones and naphthols/substituted phenols is described. Two six-membered cycles were formed in a one-pot operation. This reaction was probably achieved via a Friedel-Crafts alkylation/bicyclization domino process. This journal is © The Royal Society of Chemistry.
Wu S.-Q.,China West Normal University |
Wu S.-Q.,Hubei Normal University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2011
I construct exact solutions for general nonextremal rotating, charged Kaluza-Klein black holes with a cosmological constant and with arbitrary angular momenta in all higher dimensions. I then investigate their thermodynamics and find their generalizations with the Newman-Unti-Tamburino charges. The metrics are given in both Boyer-Lindquist coordinates and a form very similar to the famous Kerr-Schild ansatz, which highlights its potential application to include multiple electric charges into solutions yet to be found in gauged supergravity. It is also observed that the metric ansatz in D=4 dimensions is similar to those previously suggested by Yilmaz and later by Bekenstein. © 2011 American Physical Society.
Chai G.,Hubei Normal University
Computers and Mathematics with Applications | Year: 2011
In this paper, we consider the existence of solutions for the nonlinear fractional differential equation CD0+αu(t)+r CD0+α-1u(t)=f(t,u(t)),t∈(0,1) with the boundary value conditions u(0)=u(1),u(ξ)=η,ξ∈(0,1), where CD0+α and CD0+α-1 are the standard Caputo derivative with 1<α≤2,r≠0. By using the contraction mapping principle and the Schauder fixed point theorem, some existence results are obtained. In addition, Lemma 2.6 in this paper is a valuable tool in seeking solvability of the fractional differential equations. © 2011 Elsevier Ltd. All rights reserved.
Wang D.,Hubei Normal University
Journal of Alloys and Compounds | Year: 2013
Preparation and photoluminescence behavior of four new europium (III) ternary complexes with b-diketones (1-(6-methoxy-naphthalen-2-yl)-3-phenyl- propane-1,3-dione (MNPPD) and 1-(4-tertbutyl- phenyl)-3-(6-methoxy-naphthalen-2- yl)-propane-1,3-dione (BPMPD)) and 2,2-dipyridine (Bipy) or 1,10-phenanthroline (Phen) were reported, in the solid state. Complexes Eu(MPPD)3Bipy, Eu(BMPD)3Bipy, Eu(MPPD)3Phen and Eu(BMPD)3Phen were characterized by elemental analysis, FT-IR, 1H NMR, UV-vis absorption. The emission spectra show narrow emission bands that arise from the 5D0→ 7FJ (J = 0-4) transitions of the europium ion. Based on the emission spectra and luminescence decay curves in solid state, the intensity parameters (Ω τ ), lifetime (η ) and emission quantum efficiency (η ) were determined. The Ω 2 values indicate that the Eu(III) ion in these complexes is in a highly polarizable chemical environment. Complexes Eu(MPPD)3Bipy and Eu(MPPD)3Phen showed a longer lifetime (s) and a higher luminescence quantum efficiency (g), which indicated that the energy transfer to the europium ion from MNPPD ligand is more efficient than that from BPMPD ligand. © 2013 Elsevier B.V. All rights reserved.
Cheng Y.,Hubei Normal University |
Tang G.,Hubei Normal University |
Adhikari S.K.,São Paulo State University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2014
We study the localization of a noninteracting and weakly interacting Bose-Einstein condensate (BEC) with spin-orbit coupling loaded in a quasiperiodic bichromatic optical lattice potential using the numerical solution and variational approximation of a binary mean-field Gross-Pitaevskii equation with two pseudospin components. We confirm the existence of the stationary localized states in the presence of the spin-orbit and Rabi couplings for an equal distribution of atoms in the two components. We find that the interaction between the spin-orbit and Rabi couplings favors the localization or delocalization of the BEC depending on the phase difference between the components. We also studied the oscillation dynamics of the localized states for an initial population imbalance between the two components. © 2014 American Physical Society.