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Taiyuan, China

Su J.-R.,Shan Xi University
Proceedings - 2011 7th International Conference on Natural Computation, ICNC 2011 | Year: 2011

An improved particle swarm optimization algorithm is proposed in this paper. The algorithm draws on the thinking of the greedy algorithm to initialize the particle swarm. Two swarms are used to optimize synchronously, and crossover and mutation operators in genetic algorithm are introduced into the new algorithm. The algorithm is used to solve multi-object Traveling Salesman Problem. We also use this algorithm to solve multi-object TSP of ten scattered attractions in Shan Xi Province. The results show that the algorithm has high convergence speed and convergence ratio. More Pareto optimal are found with this algorithm. © 2011 IEEE. Source

Liang C.,South China University of Technology | Li Z.,Shan Xi University
Journal of Thermal Science and Technology | Year: 2015

Membrane-based total heat exchanger is a device to recover both sensible heat and moisture from exhaust air stream from a building. Heat and mass transfer intensification has been undertaken by using a structure of cross-corrugated triangular ducts. Conjugate heat under laminar flow regime in this total heat exchanger are investigated. Contrary to the traditional methods of assuming a uniform temperature or a uniform heat flux boundary condition, in this study, the real boundary conditions on the exchanger surfaces are obtained by the numerical solution of the coupled equations that govern the transfer of momentum and energy in the two air streams and in the membrane materials. The naturally formed heat boundary conditions are then used to calculate the cyclic mean Nusselt numbers along the exchanger ducts. The data are compared with those results under uniform temperature and uniform heat flux boundary conditions. The heat transfer will change with different thermal wall boundary conditions. Synergy principle is applied to reveal the Nusselt number variation with various thermal wall boundary conditions. © 2015 The Japan Society of Mechanical Engineers. Source

Liang C.H.,Guilin University of Electronic Technology | Liang C.H.,University of Florida | Zeng S.,Guilin University of Electronic Technology | Li Z.X.,Shan Xi University | And 2 more authors.
International Journal of Heat and Technology | Year: 2016

The purpose of this study is to find the optimal designing parameters of a plate-fin heat sink under natural convection using the Particle Swarm Optimization (PSO) Algorithm. Minimization of entropy generation rate under given space restrictions is considered as objective functions. All relevant design parameters for plate-fin heat sinks are the fin height, fin number, fin thickness. The constraints of the variables are set according to the suggestion structure design. And this three variables influence on entropy generation are presented. In the present study, In order to prevent the size of the heat sink is too large, we use the penalty function method in this study. Then the code for the PSO is written in MATLAB. On this basis, the optimal size of heat sink was obtained through the particle swarm algorithm for numerical simulation of this model: fin height is 44.8mm, number of fins is 25, fin thickness is 0.6mm and base temperature is 342.6241k. Source

Cai Z.,Central South University | Ren X.,Central South University | Hao G.,Shan Xi University | Chen B.,Central South University | Xue Z.,Copenhagen University
Proceedings of the World Congress on Intelligent Control and Automation (WCICA) | Year: 2011

Recent development of multi-robots and wireless sensor network technologies have lead to the emergence of distributed wireless sensor and actor networks. This kind of hybrid network can not only observe the environment, processing the event data, making decisions based on special event, but also more important, it can perform appropriate actions to interact with the environment. The survey of the recent researches on wireless sensor and actor network was given in the paper, mainly about research situations and important research topics which are architecture; coordinate mechanism among sensors and actors; communication protocol and application research based on WSANs. This paper explores research challenges for coordination and communication problems, and the future research directions of WSAN are raised then. © 2011 IEEE. Source

Gao Y.,Shan Xi University | Pan J.G.,Shan Xi University | Huang Y.J.,Shan Xi Pharmanceutical College | Ding S.Y.,Shan Xi University | Wang M.L.,Shan Xi University
Journal of Porphyrins and Phthalocyanines | Year: 2015

Three mono-fluorine substituted porphyrin compouds were synthesized under microwave irradiation. The effects of catalysts and oxidants on the yields of mono-fluorine substituted porphyrins also were investigated. The yields of 5,10,15,20-tetrakis(4-fluorophenyl)porphyrin, 5,10,15,20-tetrakis(3-fluorophenyl)porphyrin, 5,10,15,20-tetrakis(2-fluorophenyl)porphyrin in a use of nitrobenzene in propionic acid were 36%, 30% and 28%, respectively. In addition, the zinc(II) ion incorporation reactions into porphyrins to form the zinc porphyrin complexes have been kinetically investigated in acetic acid. © 2015 World Scientific Publishing Company. Source

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