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World Congress on Intelligent Control and automation (WCICA)

作者： Huawei Chen Hualan Zhong Haiying Yuan Fan Jin School of Information Science & Technology Southwest Jiaotong University Chengdu China School of Electrical and Electronic East China Jiao Tong University Nanchang China College of Automation Engineering University of Electronic Science and Technology Chengdu China

This paper proposes a new training algorithm called bi-phases weights' adjusting (BPWA) for feedforward neural networks. Unlike BP learning algorithm, BPWA can adjust the weights during both forward phase and backward phase. The algorithm computes the minimum norm square solution as the weights between the hidden layer and output layer in the forward pass, while the backward pass, on the other hand, adjusts other weights in the network according to error gradient descent method. The experimental results based on function approximation and classification tasks show that new algorithm is able to achieve faster converging speed with good generalization performance when compared with the BP and Levenberg-Marquardt BP algorithm

关键词： Multi-layer neural network Neural networks Feedforward neural networks Electronic mail Paper technology automation Approximation algorithms Information science Educational institutions Computer networks

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Estimation of the reliability of farm transport vehicle based on artificial neural network

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Rengong Jingti Xuebao/Journal of Synthetic Crystals 2006年第4期35卷 102-105页

作者： Wang, Jinwu Liu, Dahai College of Engineering Northeast Agricultural University Harbin 150030 China College of Applied Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China

As a peculiar product in China today, farm transport vehicles play a very important role in economic construction and development of the countryside, but its work reliability remains low. In this paper truncated tracking is used to solve the low reliability of farm transport vehicles. Relevant reliability data were obtained by tracking a certain model vehicle and conducting reliability experiments. Data analysis revealed the weakest part of the vehicle system was the engine assembly. The theory of artificial neural network was employed to estimate a parameter of the reliability model based on self-adaptive linear neural network, and the reliability function educed by the estimation could provide important theory references for reliability reassignment, manufacture and management of farm transport vehicles.

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Automatic Generation of Digital Terrain Elevations with Single Satellite Imagery

Automatic Generation of Digital Terrain Elevations with Sing...

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International Conference on Information and automation (ICIA)

作者： Hongbo Yu Huaixin Chen Liping Lei Technique Development Center Southwest China Institute of Electronic Technology Chengdu Sichuan China College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing Jiangsu China

More and more engineering applications need denser and more accurate Digital Terrain Model (DTM) height data. Whereas, collecting additional height data in the field, if not impossible, is either expensive or time consuming or both. Advanced space technology has provided much single high-resolution satellite imageries almost worldwide. This paper discusses the idea of using Shape From Shading (SFS) methods with single high resolution imagery. Regular grids of digital terrain elevations are generated by a four-directional weighed algorithm we propose in this paper. Preliminary results are very encouraging and the methodology is going to be implemented with real satellite imagery and parallel computations

关键词： Satellites Shape Surface reconstruction Stereo vision Space technology Optical reflection Reflectivity Remote sensing Data engineering Digital elevation models

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Exploration and safety evaluation on Panzhihua iron barren rock with physical geographical methods

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Chinese Journal Of Geochemistry 2006年第B8期25卷 37-37页

作者： Xianguo TUO Wan LEI Zhengqi XU Jinxi LI Keliang MU College of Information Engineering Chengdu University of Technology Chengdu 610059 China The College of Applied Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China

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Shot noise in an Aharonov-Bohm interferometer with embedded double quantum dots

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Physical Review B 2006年第8期74卷 085106-085106页

作者： Guang-Biao Zhang Shun-Jin Wang Lei Li Department of Physics Sichuan University 610064 Chengdu People’s Republic of China College of Nuclear Science and Technology Harbin Engineering University 150001 Harbin People's Republic of China Department of Modern Physics Lanzhou University 730000 Lanzhou People's Republic of China

The charge conductance and the shot noise in an Aharonov-Bohm interferometer with double quantum dots embedded are studied in the framework of the equation of motion of Green’s function. From the impurity Anderson model Hamiltonian, the equations of motion of Green’s functions are derived and solved including the effects of two body correlations under Lacroix’s approximation. Our results show that the conductance, the shot noise, and the Fano factor as functions of the magnetic flux oscillate with a correct period of h∕e, and their oscillation behaviors are in agreement with the experimental data within one order of magnitude.

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A genetic algorithm for the optimization of cable routing

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Systems and Computers in Japan 2006年第7期37卷 61-71页

作者： Ma, Xuan Iida, Kazuhiro Xie, Mengchun Nishino, Junji Odaka, Tomohiro Ogura, Hisakazu Graduate School of Engineering University of Fukui Fukui City 910-8507 Japan Wakayama National College of Technology Gobo City 644-0023 Japan Faculty of Automation and Information Engineering Xi an University of Technology B Techno College Department of Electrical and Computer Engineering Wakayama National College of Technology Information Processing Society of Japan China Mechanical Design Society Department of Systems Engineering University of Electro-Communications Japan Society for Fuzzy Theory and Intelligent Informatics Japanese Academy of Facial Studies Japan Society of Kansei Engineering Graduate Program of Nuclear Power and Energy Safety Engineering Graduate School of Engineering Fukui University IEEE CS ACM IPSJ IEICE JSMBET Department of Human and Artificial Intelligent Systems JSAI Japan SOFT IEEE

In this paper the authors propose a structural method for a genetic algorithm (GA) for the optimization problem of cable routing in which cables have to be laid optimally. When there are no limits on the layout routes, the optimal routes for the individual cables can be found using the Dijkstra method in a finite discrete graph. However, when there are limits on the capacity in the layout routes, optimization cannot be performed using the Dijkstra method. The proposed GA is a two-level hierarchical GA that uses chromosome coding involving two levels. The routes for each cable and the combinations of cable routes are defined respectively, and layout route selection is optimized overall through genetic operations involving these levels. Block crossover and block mutation are used as genetic operations in the first level. In addition, a method to take advantage of lethal genes, which do not satisfy the constraints and are generated in the second level is used. Computer simulations confirm that the two-level hierarchical GA with these genetic operations functions effectively for the optimization problem of cable routing. © 2006 Wiley Periodicals, Inc.

关键词： Electric cable laying

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Two-level hierarchical optimal control algorithm for large scale systems with transiently chaotic network

Two-level hierarchical optimal control algorithm for large s...

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2005 International Conference on Communications, Circuits and Systems

作者： Li, Xinyu KangBo College of Automation Engineering University of Electronic Science and Technology Chengdu China

ISBN: (纸本)0780390156

To deal with the optimization of control problem for large-scale systems using Hopfield network (HNN) that is easily trapped In local minimum, two-level hierarchical optimization network based on transiently chaotic network (TCNN) is proposed in this paper. The stability of this network and the equality between the stable value of this network and the optimal solution for the control problem of large scale systems are proved subsequently. Because TCNN has richer and more flexible dynamics compared to HNN, this network holds higher ability of searching for globally optimal solutions to the optimization control for large scale systems. The simulation results illustrate the effectiveness of this optimal network. © 2005 IEEE.

关键词： Algorithms

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Ant algorithms for power management system of wearable computer

Ant algorithms for power management system of wearable compu...

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ISCIT 2005 - International Symposium on Communications and Information Technologies 2005

作者： Chengdongyi, Hedingrun Liuxiaoyun College of Automation Engineering University of Electronic Science and Technology of China Chengdu Sichuan China

ISBN: (纸本)0780395387

Power use is one of the most important factors for wearable computer. This paper first imposes Ant algorithms for power management system of wearable computer, which is able to do developing control power use and dynamic attempter loads;then improves the efficiency of power use and prolongs working hours of wearable system. The result shows that it is viable to improve on traditional power management system of wearable compute. © 2005 IEEE.

关键词： Wearable computers

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Ant algorithms for power management system of wearable computer

Ant algorithms for power management system of wearable compu...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： Hedingrun Liuxiaoyun Chengdongyi College of Automation Engineering University of Electronic Science and Technology Chengdu Sichuan China

Power use is one of the most important factors for wearable computer. This paper first imposes ant algorithms for power management system of wearable computer, which is able to do developing control power use and dynamic attempter loads; then improves the efficiency of power use and prolongs working hours of wearable system. The result shows that it is viable to improve on traditional power management system of wearable computer.

关键词： Energy management Power system management Wearable computers Cities and towns Batteries Energy consumption Ant colony optimization Control systems Mobile computing Educational institutions

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Ratcheting Behavior of T225NG Titanium Alloy under Uniaxial Cyclic Stressing: Experiments and Modeling

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Chinese Journal of Aeronautics 2005年第1期18卷 31-39页

作者：蔡力勋牛清勇邱绍宇刘宇杰 Department of Applied Mechanics and Engineering Southwest Jiaotong UniversityChengdu 610031China.National Key Laboratory for Nuclear Fuel and Material Nuclear Power Institute of China Chengdu 610051China College of Science Wuhan University of Science and Technology Wuhan 430081China National Key Laboratory for Nuclear Fuel and Material Nuclear Power Institute of China Chengdu 610051China Department of Applied Mechanics and Engineering Southwest Jiaotong UniversityChengdu 610031China

In order to investigate the ratcheting behavior of T225NG alloy, a series of ratcheting tests under uniaxial long-cyclic stressing were performed. The results show that the ratcheting strain of this alloy can get into shakedown after tens （or hundreds） of thousand cycles. After the ratcheting strain is saturated under the condition that stress amplitude is half of peak stress, it will bring about subsequent fatigue failure, and relationship between fatigue life and one of peak stress and saturated ratcheting （SR） strain meets power law. As the alloy is under stress jiggling with stress amplitude that is 1%-2.5% of peak stress, the ratcheting strain still become remarkable and goes into shakedown after several hundreds of thousand cycles but there exists little accessional strain caused by creep effect. It is notable that, when the peak stress is 85%-100% of yield stress, the long-cyclic stressing will lead SR strain to be from 1.4% to 2.5% even if the initial ratio of ratcheting strain is zero. Based on ratcheting threshold property of peak stress and monotonicity of relationship between the peak stress and SR strain, a saturated ratcheting model （SRM） is developed to predict SR strain and to estimate saturated creep strain also. In addition, the classes of ratcheting evolutions of metals are discussed.

关键词： T225NG titanium alloy shakedown ratcheting cycle plasticity stress strain fatigue creep

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