Hunan University of Technology

www.hut.edu.cn
Zhuzhou, China
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Zhang A.,Hunan University of Technology
Journal of Experimental and Theoretical Artificial Intelligence | Year: 2017

In this paper, cellular neural networks with oscillating leakage coefficients and complex deviating arguments are considered. Some criteria are established for the existence of pseudo almost periodic solutions for these models by using the contraction mapping fixed point theorem and inequality analysis technique. The results of this paper are new and complement the previously known ones. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Li J.,Hunan University of Technology
Journal of Chemical and Pharmaceutical Research | Year: 2014

With constantly developing of social scientific theory, present correlation theoretical researches are urgently in need of natural science, modern science and technology melting, in the hope of deeply solving relative problems. This paper targeted sports movement horizontal bar event, taking athletes' downward swinging as examples, analyze athletes' status, establish mathematical model, and implement discussion and researching on relative problems. According to body swaying technical features, multi rigid body model, then utilizes dynamics method, corresponding dynamic equation deducing human race swaying. Results show giants turn or grip change motion is more beneficial in 40°-50°or 310°-320°.


Xu C.,Guizhou University of Finance and Economics | Zhang Q.,Hunan University of Technology | Wu Y.,Henan University of Science and Technology
Network: Computation in Neural Systems | Year: 2014

In this paper, shunting inhibitory cellular neural networks(SICNNs) with neutral type delays and time-varying leakage delays are investigated. By applying Lyapunov functional method and differential inequality techniques, a set of sufficient conditions are obtained for the existence and exponential stability of pseudo almost periodic solutions of the model. An example is given to support the theoretical findings. Our results improve and generalize those of the previous studies. © 2014 Informa UK, Ltd.


Zhang A.,Hunan University of Technology
Neural Processing Letters | Year: 2017

This article is concerned with shunting inhibitory cellular neural networks involving neutral type proportional delays and D operators. Applying Lyapunov functional method and differential inequality techniques, we employ a novel argument to establish some new criteria on the existence and generalized exponential stability of almost periodic solutions of the addressed systems. In addition, numerical simulations are carried out to verify our theoretical findings. © 2017 Springer Science+Business Media New York


Dou C.-X.,Yanshan University | Liu B.,Hunan University of Technology | Liu B.,Australian National University
IEEE Transactions on Smart Grid | Year: 2013

This paper studies the smart control issue for an autonomous microgrid in order to maintain the secure voltages as well as maximize economic and environmental benefits. A control scheme called as multi-agent based hierarchical hybrid control is proposed versus the hierarchical control requirements and hybrid dynamic behaviors of the microgrid. The control scheme is composed of an upper level energy management agent, several middle level coordinated control agents and many lower level unit control agents. The goals of smart control are achieved by designed control strategies. The simulations are given to demonstrate the effectiveness of proposed smart control for an autonomous microgrid. © 2010-2012 IEEE.


Zhang A.,Hunan University of Technology
Neural Processing Letters | Year: 2015

This paper discusses the issue of a class of cellular neural networks with continuously distributed delays in the leakage terms. By applying Lyapunov functional method and differential inequality techniques, without assuming the boundedness conditions on the activation functions, a new delay dependent sufficient condition is derived to ensure that all solutions of the networks converge exponentially to the zero point, which corrects some recent results of Xiong and Meng (Electron J Qual Theory Differ Equ, (10):1–12, 2013. http://www.math.u-szeged.hu/ejqtde/). © 2014, Springer Science+Business Media New York.


Liu S.,Hunan University of Technology | Huang C.,Central South University
Buildings | Year: 2016

The unique architectural style of traditional "Yinzi" dwellings inWestern Hunan, China, needs to be protected and their natural ventilation of patio space should also be promoted. Therefore, this study aimed at finding out the natural ventilation values and limitations of "Yinzi" dwellings as well as designing an optimum ventilation strategy for such dwellings. In this work, the thermal environment of a typical "Yinzi" dwelling was tested. The two patios and living room space of "Yinzi" dwellings was selected for a quantitative analysis, and CFD software was adopted to simulate the stack effect of different patio proportions under the same static wind environment conditions. In addition, an orthogonal experiment is combined with CFD simulation to explore the best proportion and position of patio of "Yinzi" dwellings. A final optimum ventilation strategy is provided for the "Yinzi" dwellings, which can significantly promote the natural stack effect of "Yinzi" dwellings in summer. © 2016 by the authors.


Cai S.-P.,Hunan University of Technology
Journal of Hydrodynamics | Year: 2010

In order to develop technologies of friction drag reduction with a flexible tube to be used for water transport, experimental studies were carried out on the influence of Young's modulus on the turbulent drag reduction. The friction coefficients of flexible tubes with different Young's modulus were examined by using a sleeve-tube structure. The fluctuating vibration of the outer wall and the fluctuating pressure on the inner wall of the tubes were measured with a laser displacement sensor and a pressure sensor. The results are as follows. The smaller the Young's modulus of a flexible tube and the larger the Reynolds number, the larger the turbulent drag reduction rates become. The transition from laminar flow to turbulent flow can be delayed with an appropriate Young's modulus. Non-dimensional amplitude of fluctuating vibration on the outer wall is smaller than that of a viscous sub-layer thickness, and is positively correlated with the friction drag reduction. © 2010 Publishing House for Journal of Hydrodynamics.


Chen Z.,Hunan University of Technology
Neural Computing and Applications | Year: 2013

In this paper, a shunting inhibitory cellular neural network with leakage delays and continuously distributed delays of neutral type is considered. Some sufficient conditions are established to ensure that all solutions of the networks converge exponentially to zero point, which are new and complement of previously known results. © 2012 Springer-Verlag London.


Xu C.,Guizhou University of Finance and Economics | Zhang Q.,Hunan University of Technology
Neural Computation | Year: 2014

In this letter, a class of Cohen-Grossberg shunting inhibitory neural networks with time-varying delays and impulses is investigated. Sufficient conditions for the existence and exponential stability of antiperiodic solutions of such a class of neural networks are established. Our results are new and complementary to previously known results. An example is given to illustrate the feasibility and effectiveness of our main results. © 2014 Massachusetts Institute of Technology.

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