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145th Annual Meeting and Exhibition, TMS 2016

作者： Liu, Yingli Yin, Jiancheng Jiang, Ying Zhong, Yi Computer Technology Application Key Lab. of Yunnan Province Kunming University of Science and Technology 727 Jingming South Road Area Chenggong Kunming Yunnan650500 China Faculty of Information Engineering and Automation Kunming University of Science and Technology 727 Jingming South Road Area Chenggong Kunming Yunnan650500 China Faculty of Materials Science and Engineering Kunming University of Science and Technology 68 Wenchang Road 121 Street Kunming Yunnan650500 China

ISBN: (纸本)9781119225836

Hot compression of the ZnCu2A110 alloy was conducted on a Gleeble-3800D thermomechanical simulator in the temperature range of 150-330°C and strain rate of 0.01-10 s-1. Base on the experimental results, An Artificial Neural Network (ANN) with double bidden layers composing of 10 neurons and 15 neurons were employed to simulate the flow behavior. The inputs of the model are temperature, strain and strain rate. The output of the model is the flow stress. As a result, the minimum relative error is 0.01%, the maximum relative error is 2.25%, and error majority concentrate within 0.81%, Mean Absolute Percentage Error (MAPE) is 0.0101, error is very small. The results indicate that the trained ANN model is a robust tool to predict the high temperature flow behavior of ZnCu2A110 alloy.

关键词： Neural networks

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Model predictive control of five-level H-bridge neutral-point-clamped qZS inverter

Model predictive control of five-level H-bridge neutral-poin...

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Annual Conference of Industrial Electronics Society

作者： Sertac Bayhan Panagiotis Kakosimos Haitham Abu-Rub Jose Rodriguez Department of Electrical and Computer Engineering Texas A&M University at Qatar Doha Qatar Department of Electronics and Automation Gazi University Ankara Turkey The Faculty of Engineering Universidad Andres Bello Santiago Chile

This paper presents a model predictive control (MPC) of five-level H-bridge neutral-point-clamped (NPC) quasi-impedance source inverter (qZSI). The proposed control technique is designed to handle three control objectives with simple and effective approach. The output current, the input current and the capacitor voltage are the control objectives of the proposed MPC algorithm. To fulfill these control objectives, multi-objective based cost function is employed. Furthermore, qZSI has been combined with the 5-Level H-bridge NPC inverter so as to obtain power converter topology with buck/boost and dc/ac conversion functionality in a single stage for high power PV applications. Simulation results verify the proposed multi-objective MPC algorithm and inverter topology.

关键词： Inverters Capacitors Topology Inductors Mathematical model Network topology Cost function

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An E-Commerce Recommender System Based on Click and Purchase Data to Items and Considered of Interest Shifting of Customers

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China Communications 2015年第S2期12卷 72-82页

作者： Duo Lin Wu Zhaoxia XU Shenggang School of Computer and Communication Engineering University of Science and Technology Beijing Faculty of Information Engineering and Automation Kunming University of Science and Technology School of Applied Mathematics Xinjiang University of Finance and Economics

A well-performed recommender system for an e-commerce web site can help customers easily find favorite items and then increase the turnover of merchants, hence it is important for both customers and merchants. In most of the existing recommender systems, only the purchase information is utilized data and the navigational and behavioral data are seldom concerned. In this paper, we design a novel recommender system for comprehensive online shopping sites. In the proposed recommender system, the navigational and behavioral data, such as access, click, read, and purchase information of a customer, are utilized to calculate the preference degree to each item; then items with larger preference degrees are recommended to the customer. The proposed method has several innovations and two of them are more remarkable: one is that nonexpendable items are distinguished from expendable ones and handled by a different way; another is that the interest shifting of customers are considered. Lastly, we structure an example to show the operation procedure and the performance of the proposed recommender system. The results show that the proposed recommender method with considering interest shifting is superior to Kim et al(2011) method and the method without considering interest shifting.

关键词： recommender system online shopping e-commerce preference degree

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Delay Systems with Meromorphic Functions Design

Delay Systems with Meromorphic Functions Design

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IEEE International Conference on Control and automation

作者： Roman Prokop Jiri Korbel Libor Pekar Department of Mathematics Tomas Bata University in Zlin Faculty of Applied Informatics Department of Computer and Communication Systems Tomas Bata University in Zlin Faculty of Applied Informatics Department of Automation and Control Engineering Tomas Bata University in Zlin Faculty of Applied Informatics

ISBN: (纸本)9781509017393

The paper is focused on systems with delay terms at the left (and the right) side of differential equations. Analysis and synthesis of delay systems can be conveniently studied through a special ring of RQ-meromorphic functions. The control methodology is based on a solution of Diophantine equations in this ring. Final controllers result in the Smith predictor like structure. Controller parameters are tuned through a pole-placement problem as a desired multiple root of the characteristic closed loop equation. The methodology is illustrated by a stable second order transfer function with a dead-time term. Then the paper brings an autotuning method as a combination of biased-relay feedback estimation and the proposed algebraic control design. The developed approach is illustrated by examples in the Matlab and Simulink environment.

关键词： Delay systems Rings Diophantine equation Autotuning Relay experiment

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Application of proper orthogonal decomposition and radial basis functions for crack size estimation using particle swarm optimization

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Journal of Physics: Conference Series 2017年第1期842卷

作者： B Benaissa M Köppen M Abdel Wahab S Khatir LEMI Department of Mechanical Engineering University M'hamed Bougara of Boumerdes. Algeria. Faculty of Computer Science and Systems Engineering Department of Creative Informatics Kyushu Institute of Technology. Japan. Department of Electrical Energy Systems and Automation Faculty of Engineering and Architecture Ghent University. Belgium.

Complex engineering problems require simulations, which are computationally expensive in cases of inverse identification tasks since they commonly requires hundreds of thousands of simulations. This paper propose a method based on model reduction for crack size estimation, combining the proper orthogonal decomposition method with radial basis functions. The reduced model is validated by comparing the obtained boundary displacements with the corresponding results from a finite element model. This inverse procedure is formulated as the minimization of the difference between the measured and computed values of displacement at selected boundary nodes, called sensor points, using particle swarm optimization algorithm. Convex and a non-convex specimens have been considered for investigations of crack presence, and identification of its size, different crack sizes have been tested to demonstrate the efficiency of the proposed approach.

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Multithreshold robastny methods of increase of reliability of detection of sources of radio signals

Multithreshold robastny methods of increase of reliability o...

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International Scientific-Technical Conference on Actual Problems of Electronics Instrument engineering

作者： Jiry M.Katruk Mikhail L.Kurshin Viktor A. Trushin Novosibirsk State Technical University / Faculty of Automation and Computer Engineering Russia

ISBN: (纸本)9781509040704

In work problems of detection of sources of radio signals in rooms of room type against various hindrances as are regular also noise, and powerful pulse are considered. Robastnymulti-threshold approach for increase of detection of informative signals is offered. Problems of the choice of quantity and values of these thresholds are discussed. Specifics of application of this approach for a case of detection of broadband signals are noted.

关键词： robastny estimates errors of the first and second sort algorithm of detection broadband

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Discovering admissible Web services with uncertain QoS

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Frontiers of computer Science 2015年第2期9卷 265-279页

作者： Xiaodong FU Kun YUE Li LIU Ping ZOU Yong FENG Yunnan Provincial Key Laboratory of Computer Technology Application Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming 650500 China School of Information Science and Engineering Yunnan University Kunming 650091 China Faculty of Management and Economics Kunming University of Science and Technology Kunming 650093 China

Open and dynamic environments lead to inher- ent uncertainty of Web service QoS （Quality of Service）, and the QoS-aware service selection problem can be looked upon as a decision problem under uncertainty. We use an empiri- cal distribution function to describe the uncertainty of scores obtained from historical transactions. We then propose an approach to discovering the admissible set of services in- cluding alternative services that are not dominated by any other alternatives according to the expected utility criterion. Stochastic dominance （SD） rules are used to compare two services with uncertain scores regardless of the distribution form of their uncertain scores. By using the properties of SD rules, an algorithm is developed to reduce the number of SD tests, by which the admissible services can be reported pro- gressively. We prove that the proposed algorithm can be run on partitioned or incremental alternative services. Moreover, we achieve some useful theoretical conclusions for correct pruning of unnecessary calculations and comparisons in each SD test, by which the efficiency of the SD tests can be im- proved. We make a comprehensive experimental study using real datasets to evaluate the effectiveness, efficiency, and scal- ability of the proposed algorithm.

关键词： Web services uncertain QoS partial preference,empirical distribution function stochastic dominance admis-sible set

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Research on magnetic compass calibration for air-ground amphibious robot system

Research on magnetic compass calibration for air-ground amph...

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Chinese Control Conference (CCC)

作者： Qiuyue Yu Lei Cheng Qinyan Zhang Yang Chen Huaiyu Wu Quanmin Zhu Yongji Wang Nian Liu Engineering Research Center for Metallurgical Automation and Measurement Technology Wuhan University of Science and Technology Wuhan Hubei CN Faculty of Computer University of the West of England Bristol Bristol Bristol GB School of Automation Huhzhong University of Science and Technology Wuhan China

Focusing on the background of utilizing magnetic compass in the air-ground amphibious robot system, this paper explores error compensation of magnetic compass in the process of moving on the ground and the air. Based on the error analysis on the air-ground amphibious robot magnetic compass, this paper applies the ellipsoid fitting algorithm for error identification of this model coefficient and thus calibration of magnetic compass is realized in the flight. Finally, through the processing of three sets of data together with the comparison of the traditional empirical Calibration methods, the effectiveness of the proposed method is verified.

关键词： Compass Magnetic fields Magnetometers Mobile robots Calibration Robot kinematics

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Adaptive Fuzzy Yaw Moment Control of Humanoid Robot Based On Ankle Joint 34

Adaptive Fuzzy Yaw Moment Control of Humanoid Robot Based On...

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第三十四届中国控制会议

作者： YANG Liang LIU Zhi ZHANG Yun Faculty of Automation Guangdong University of Technology School of Computer Engineering University of Electronic Science and Technology of China Zhongshan Institute

ISBN: (纸本)9781467374439

This paper investigates the problem of yaw moment control of humanoid robot and presents a robust adaptive control system for compensating the undesired yaw moment. In order to get the ideal ankle joint trajectory with low energy consumption,a novel yaw moment control based on ankle is proposed. The main strategy in this method is to adjust ankle joint trajectory in a way to exert a moment for counteracting the factors which generate the undesired yaw moment. Given the optimized ankle joint angles motion, an adaptive fuzzy control system is proposed to track the desired trajectories with model uncertainties and the stability proof is provided. Simulation results validate the proposed method.

关键词： humanoid robot,yaw moment,adaptive fuzzy control,robustness

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Testing designing an electrical device compliant with the electromagnetic compatibility directive

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IOP Conference Series: Materials Science and engineering 2017年第1期227卷

作者： M Płaczek M Maćkowski P Nowak Silesian University of Technology Faculty of Mechanical Engineering Institute of Engineering Processes Automation and Integrated Manufacturing Systems Konarskiego 18A 44-100 Gliwice Poland Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Institute of Informatics Akademicka 16 44-100 Gliwice Poland

The goal of presented work was to build an electronic device in order to test the effectiveness of different EMC-improving solutions. Three EMC tests were done in order to check the created device compliance with the electromagnetic compatibility directive. Each of them was conducted for both industrial and non-industrial parameters (voltage and field strength), according to IEC PN-EN 61000 standards. Three tests were done: conductive immunity test in EM clamp, radiated immunity test in GTEM chamber, radiated emission test in GTEM chamber. Firstly, the device's conductive immunity was examined. The set of possible solutions was created by examining existing designs, papers, books and producers' recommendations. In result, different component configurations were chosen to determine the most EMC-effective one. Next, electromagnetic compatibility of proposed device configurations was tested in the GTEM chamber (radiated immunity and radiated emission). Tests results are presented on charts and analysed in order to verify if designed device face requirements of the electromagnetic compatibility directive. It was verify which of proposed electromagnetic compatibility improving solutions can solve problems with electromagnetic compatibility.

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