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The International Symposium on Photonics and Optoelectronics(SOPO 2013)

作者： Hui Xue Zhixiang Huang Xianliang Wu Key Laboratory of Intelligent Computing and Signal Processing Anhui University Department of Physics and Electronic Engineering Hefei Normal University

A faster numerical method based on FDTD for the four energy level atomic system is present here. The initial conditions for the electrons of each level are achieving while the fields are in steady state. Polarization equation, rate equations of electronic population and Maxwell's equations were used to describe the coupling between the atoms and electromagnetic wave. Numerical simulations, based on a finite-difference time-domain (FDTD) method, were utilized to obtain the population inversion and lasing threshold. The validity of the model and its theory is confirmed. The time, which we can observe the lasing phenomenon, is much shorter in our new model. Our model can be put into using in large scale simulations in mutiphysics to reduce the total simulated time.

关键词： Finite-Difference Time-Domain Gain Material Lasing

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A new automatic analysis system for risk behaviors

A new automatic analysis system for risk behaviors

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2013 International Conference on Information and Communication Technology for Education (ICTE 2013)

作者： Chan Xu Xin Liu Jian Wu BoYu OuYang Key Laboratory of Intelligent Computing and Information Processing (Xiangtan University) Ministry of Education Institute of Information Engineering Xiangtan University

At present, the software's type forms present diversity, and how to automatically analyze the software's risk behaviors become an urgent problem. This paper used some software behavior crawlers and dynamic analysis method, crawled many representative kinds of malware's behavior, then mapped the behavior as a training data, and combined with BP neural network, established an automated analysis system for risk behaviors. Experiment shows that the system can automatically analyze whether a software is malware, which has better results and a strong practical intelligence.

关键词： risk behavior dynamic analysis malware BP neural network dangerous behaviors intelligence

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A knowledge-based heuristic particle swarm optimization approach with the adjustment strategy for the weighted circle packing problem

A knowledge-based heuristic particle swarm optimization appr...

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作者： Li, Ziqiang Tian, Zhuojun Xie, Yanfang Huang, Rong Tan, Jiyang School of Information and Engineering Xiangtan University Xiangtan Hunan 411105 China Key Laboratory of Intelligent Computing and Information Processing Xiangtan University Ministry of Education Xiangtan Hunan 411105 China School of Mathematics and Computer Science Xiangtan University Xiangtan Hunan 411105 China

The weighted circle packing problem is a kind of important combination optimization problem and has the NP-hard property. Inspired by the No Free Lunch Theorem, a knowledge-based heuristic particle swarm optimization approach with the adjustment strategy (KHPSOA) is developed for this problem. The knowledge (e.g., the relation between its weight matrix and better solution) is obtained from this problem itself and existing layout scheme diagrams and applied to form more effective ordering and positioning rules of the proposed heuristic method. A better layout scheme of larger circles is obtained through the heuristic method. The optimal solution of this problem is obtained by inserting a few residual smaller circles into the gaps of the better layout scheme and further optimizing it through the proposed particle swarm optimization with the adjustment strategy. The numerical experiments show that KHPSOA is superior to the existing algorithms in the performances. © 2013 Elsevier Ltd. All rights reserved.

关键词： Heuristic methods

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A heuristic ant colony approach for the circle and rectangle packing problems with rotary inertia constraints

A heuristic ant colony approach for the circle and rectangle...

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International Conference on Natural Computation (ICNC)

作者： Ziqiang Li Bowen Song Xianfeng Wang Ruopeng Li School of Information and Engineering Xiangtan University Xiangtan China Processing of Ministry of Education Key Laboratory of Intelligent Computing & Information Xiangtan China

Time-consuming calculations of overlapping areas among objects have become a bottleneck that restricts further improvement of evolutionary algorithms for circle and rectangle packing problems. This paper proposes a heuristic ant colony optimization (HACO) algorithm for the circle and rectangle packing problems with rotary inertia constraints (ICCRPP). The proposed heuristic method is used by artificial ants to construct the feasible layout schemes. Through the ant colony optimization, the optimal layout scheme can be gotten for ICCRPP. Because the introduction of the related layout knowledge in the ordering and positioning rules can make both the envelope radius and rotary inertia of the constructing layout scheme less. The numerical experimental results show that the computational efficiency and solution accuracy of HACO algorithm are satisfactory for ICCRPP.

关键词： Layout Heuristic algorithms Optimization Ant colony optimization Algorithm design and analysis Computational efficiency Containers

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A divide-conquer quasi-physical and quasi-human algorithm for the circle and rectangle orthogonal packing problem with equilibrium constraints

A divide-conquer quasi-physical and quasi-human algorithm fo...

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International Conference on Natural Computation (ICNC)

作者： Ziqiang Li Xianfeng Wang Bowen Song Nannan Sun Processing of Ministry of Education Key Laboratory of Intelligent Computing & Information Xiangtan China School of Information and Engineering Xiangtan University Xiangtan China

The circle and rectangle orthogonal packing problem with equilibrium constraints (ECROPP) belongs to NP-hard problems. This paper proposes a divide-conquer QPQH (DCQPQH) algorithm for this problem. A mathematical model is built for the divide-conquer solution of ECROPP. And then on the basis of the embedding depths between two rectangles and between the circle and rectangle, an elastic potential energy function of the system is given. Then, the DCQPQH algorithm is presented through a combination of the divide-conquer strategy and QPQH algorithm based on the elastic potential energy function. Because the combination makes the proposed DCQPQH algorithm inherit excellent properties of QPQH and the advantage of the divide-conquer solution, its solution accuracy and computational efficiency are improved. The numerical experiments show that performances of the proposed DCQPQH algorithm are superior to those of the existing algorithms.

关键词： Layout Containers Potential energy Algorithm design and analysis Satellites Mathematical model Heuristic algorithms

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Convergence of variational iteration method for second-order delay differential equations

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Journal of Applied Mathematics 2013年第unknown期2013卷 634670-1-634670-9页

作者： Liu, Hongliang Xiao, Aiguo Su, Lihong Key Laboratory of Intelligent Computing and Information Processing Xiangtan University Ministry of Education Xiangtan Hunan 411105 China

This paper employs the variational iteration method to obtain analytical solutions of second-order delay differential equations. The corresponding convergence results are obtained, and an effective technique for choosing a reasonable Lagrange multiplier is designed in the solving process. Moreover, some illustrative examples are given to show the efficiency of this method. © 2013 Hongliang Liu et al.

关键词： differential employs variational Differentiation matrix iteration iterative methods Differential equations delay EMPLOYMENT Converge Differential

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A heterogeneous-aware cooperative MIMO transmission scheme in WSN

Journal of Software

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Journal of Software 2013年第3期8卷 639-644页

作者： Pei, Tingrui Xie, Da Li, Zhetao Tu, Dengbiao Choi, Youngjune College of Information Engineering Xiangtan University Xiangtan 411105 China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan 411105 China School of Computer National University of Defense Technology Changsha 410073 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China Department of Information and Computer Engineering Ajou University Suwon 443749 Korea Republic of

A heterogeneous-aware cooperative MIMO transmission scheme (HAMS) is proposed to optimize the network lifetime and save energy for energy heterogeneous wireless sensor networks (WSN). This scheme extends the traditional low-energy adaptive clustering hierarchy (LEACH) protocol to enable the cooperative MIMO transmission between the sink and clusters. Through the adaptive selection of cooperative nodes and the cooperative MIMO transmission, HAMS can gain effective performance improvement in terms of taking advantage of the presence of node heterogeneity. Based on the energy consumption model developed in this paper, the optimal parameter to minimize the overall energy consumption is found. Simulation results exhibit that HAMS can effectively save energy and prolong the network time. Furthermore, HAMS displays more resilient in different degree of heterogeneous wireless sensor networks. © 2013 ACADEMY PUBLISHER.

关键词： Energy utilization

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CHARACTERIZATION OF POWDERY MILDEW IN WINTER WHEAT USING MULTI-ANGULAR HYPERSPECTRAL MEASUREMENTS

CHARACTERIZATION OF POWDERY MILDEW IN WINTER WHEAT USING MUL...

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IEEE International Geoscience and Remote Sensing Symposium

作者： Jinling Zhao Lin Yuan Linsheng Huang Dongyan Zhang Jingcheng Zhang Xiaohe Gu Beijing Research Center for Information Technology in Agriculture Beijing Academy of Agriculture and Forestry Sciences Beijing 100097 China Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei 230039 China

ISBN: (纸本)9781479911127

This study aims at characterizing wheat canopies caused by powdery mildew (Blumeria graminis f. sp. tritici) with multi-angular hyperspectral data. The filling stage (23 May, 2012) was chosen to achieve such a goal, considering that the disease can show distinctive symptoms during the months of May and June. A total of 37 sample plots were selected including 32 normal canopies and 5 diseased canopies with varied severity. To minimizing the soil background influences, multi-angular hyperspectral data were acquired at different view angles (0°, 45° and 90°). The results showed that the proportion of wheat vegetation and soil changed greatly and the hyperspectral reflectance values correspondingly changed. Consequently, the reflectance at different viewing angles showed great differences, but the curves had the same change trends. The results showed that, to accurately identify the spectral differences caused by powdery mildew, the optimal angle or a combination of several angles must be firstly found from multi-angular hyperspectral measurements.

关键词： Hyperspectral remote sensing Multi-angular spectral measurement Powdery mildew Sensitive wave bands Winter wheat powdery mildew winter wheat hyperspectral remote sensing multiangular Angle Wheat look angles (electronics) Canopies Winter

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The improved disc theorems for the Schur complements of diagonally dominant matrices

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Journal of Inequalities and Applications 2013年第1期2013卷 1-16页

作者： Zhang, Juan Liu, Jianzhou Tu, Gen Department of Mathematics and Computational Science Xiangtan University Xiangtan P.R. China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan P.R. China

The theory of Schur complement is very important in many fields such as control theory and computational mathematics. In this paper, applying the properties of Schur complement, utilizing some inequality techniques, some new estimates of diagonally dominant degree on the Schur complement of matrices are obtained, which improve some relative results. Further, as an application of these derived results, we present some distributions for the eigenvalues of the Schur complements. Finally, the numerical example is given to show the advantages of our derived results. MSC:15A45, 15A48.

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Fusion of multi-spectral image and panchromatic image based on support vector regression

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Journal of Beijing Institute of Technology 2012年第2期21卷 269-277页

作者：胡根生梁栋 Key Laboratory of Intelligent Computing and Signal Processing Ministry of EducationAnhui University School of Electronics and Information Engineering Anhui University

In our study, support vector value contourlet transform is constructed by using support vector regression model and directional filter banks. The transform is then used to decompose source images at multi-scale, multi-direction and multi-resolution. After that, the super-resolved multi-spectral image is reconstructed by utilizing the strong learning ability of support vector regression and the correlation between multi-spectral image and panchromatic image. Finally, the super-resolved multi- spectral image and the panchromatic image are fused based on regions at different levels. Our experi- ments show that, the learning method based on support vector regression can improve the effect of super-resolution of multi-spectral image. The fused image preserves both high space resolution and spectrum information of multi-spectral image.

关键词： image processing image fusion support vector regression super-resolution

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