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International Conference on Electronic Computer Technology

作者： Waghray, Namrita Menghal, P.M. Radar and Control System Dept. Faculty of Electronics Military College of Electronics and Mechanical Engineering Secunderabad 500 015 India

ISBN: (纸本)9781424486779

Electronic warfare is a military action whose objective is to control the electromagnetic spectrum. To accomplish this objective, both offensive electronic attack (EA) and electronic protection (EP) actions are required. In addition electronic warfare support (ES) actions are essential to supply the intelligence and threat recognition that allow implementation of both EA and EP. Commanders must prepare to operate weapons systems in an intensive and non-permissive electromagnetic environment. Mission accomplishment requires awareness, dynamic planning, and flexibility at all levels of war. The Information system is a rescue in this critical task. It has been proposed to develop the EW Intelligent Information system that deals with processing of electronic warfare, communications, radar, war missions etc. In this work, design and implementation of such an intelligent system is offered. Using artificial intelligence, this system aims at achieving the best performance with a friendly system in spite of the existence of hostile actions. This system deals with different sources of data. It helps visualize mission scenarios, decides the mission suitability and the best EA and ES methods accordingly. This work handles a nonlinear optimization problem with multiple variables and constraints. Closed form and exact solutions of such problems are computationally difficult. Therefore, the paper proposes the use of artificial intelligence mainly the fuzzy logic and neural networks approach to tackle this problem. Traditionally, large databases of information require complex problem solving techniques. However, the use of AI provides a simple yet computationally manageable solution for this issue. © 2011 IEEE.

关键词： Membership functions

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A neuro fuzzy PI controller used for speed control of a direct torque to twelve sectors controlled induction machine drive

A neuro fuzzy PI controller used for speed control of a dire...

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International Conference on Multimedia Computing and systems

作者： Douiri, M.R. Cherkaoui, M. Nasser, T. Essadki, A. Dept. of Electrical Engineering Mohammadia School of Engineers EMI Rabat Morocco Dept. Communication Networks National School of Computer Science and System Analysis ENSIAS Rabat Morocco Dept. Electrical Engineering Superior School of Technical Education ENSET Rabat Morocco

ISBN: (纸本)9781612847306

This paper presents a new speed controller based on the theory of adaptive fuzzy inference system based on neural (ANFIS) for a direct torque to twelve sectors controlled of the induction motor. The proposed controller integrates fuzzy logic algorithm with a structure of artificial neural network (ANN) five-layer in order to reap the benefits of both methods, the learning abilities of the first and readability and flexibility of the second. The controller replaces the conventional PI is the rule fuzzy inference system with the hybrid learning algorithm. This makes learning the fuzzy system. The performance of the proposed neuro-fuzzy control for induction motor speed was studied at different operating conditions. The simulation study shows the robustness and relevance of control for applications in high performance driving. © 2011 IEEE.

关键词： Induction motors

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Three-dimensional modeling and simulation of manipulating deformable linear objects

Three-dimensional modeling and simulation of manipulating de...

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作者： Ding, Feng Huang, Jian Wang, Yongji Toshio, Fukuda Takayuki, Matsuno Dept. Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Dept. Micro-Nano System Engineering Nagoya University Nagoya Japan

ISBN: (纸本)9789881725592

Three-dimensional dynamic modeling and numerical simulation of manipulating deformable linear objects (DLOs) such as hoses, wire and cables are studied in this paper. Several coordinate systems are introduced first to describe the deformation of DLOs. The dynamic three-dimensional deformation of an inextensible linear object is formulated using finite element method (FEM) and lagrange motion equations. The proposed method provides more efficient simulation of dynamic manipulating DLOs with faster computation speed. Two simulation examples are illustrated to confirm the effectiveness of our methods. One is a comparison simulation study and the other shows the three-dimensional dynamic character of the DLO. © 2011 Chinese Assoc of Automati.

关键词： Finite element method

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Al-RE-TM (RE = Rare-Earth Metals, TM = Transition Metals) Ternary Alloy Films for TFT-LCD Electrodes

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MRS Online Proceedings Library 2011年第1期508卷 327-332页

作者： Shinji Takayama Dept. of System and Control Engineering Hose University Tokyo Japan

The effects of adding a third transition metal element, Co, Cu, Zr, or Ta, to Al-Nd (or Gd) alloy thin films were studied in order to investigate the changes in the film’s microstructure and resistivity, and also their tendency to form hillocks or whiskers at high temperatures. The addition of Zr (or Ta), which has repulsive interactions with both Nd and Gd, to the Al-RE binary alloy films causes an increase of residual resistivity and enhances the formation of hillocks or whiskers at high temperatures. On the other hand, the addition of Cu or Co, which has attractive interactions with both Nd and Gd, results in a resistivity of less than 6 µωcm (depending on the content of added elements). Addition of either of these elements largely suppresses the growth of thermal defects after annealing at over 350 °C. The above results were explained by employing a theory of grain boundary segregation based on a chemical interaction between constituent elements of an alloy.

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Enhance performance of program automatic online judging systems using affinity algorithm and queuing theory in SMP environment

Enhance performance of program automatic online judging syst...

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2011 International Conference on Electronic and Mechanical engineering and Information Technology, EMEIT 2011

作者： Drung, Cheedoong Wang, Jianwen Guo, Ning Key Lab of Information Security for Power System Institute of Engineering Shenyang China Dept. of Control Engineering Naval Aeronautical and Astronautical University Yantai China

ISBN: (纸本)9781612840857

An OJ system is an online system to test programs in programming contests automatically. Performance enhancement of OJ systems in SMP environment is described in this paper. First, we introduce the affinity algorithm to improve the precision of the user programs' processing time. Second, by using queuing theory, a theoretical analysis and improvement of the system's performance indicators are given. By implementing these mechanisms, the average capacity of simultaneously judging tasks will increase while the judging results will become more precise, and the total number of computers in an OJ system will decrease, yielding lower hardware costs. © 2011 IEEE.

关键词： Online systems

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Securing JPEG architecture based on enhanced chaotic hill cipher algorithm

Securing JPEG architecture based on enhanced chaotic hill ci...

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2011 International Conference on Computer engineering and systems, ICCES'2011

作者： Hamissa, Ghada Sarhan, Amany Abdelkader, Hatem Fahmy, Mahmoud Electrical Engineering Dept. Faculty of Engineering KFS University Kafr-Elsheikh Egypt Computer and Automatic Control Dept. Faculty of Engineering Tanta University Tanta Egypt Information System Dept. Faculty of Comp. and Info. Menoufia University Menoufia Egypt

ISBN: (纸本)9781457701283

In the last two decades, Chaos theory has received a great deal of attention from the cryptographic community. This paper presents two ideas. First idea is using chaotic functions to overcome the weaknesses of the classical Hill cipher. The second idea is proposing a new encoder-decoder architecture, called ChaoEncoDeco, for securing JPEG images. An extra stage of encryption is embedded within the traditional JPEG codec to improve security level of such system. This security stage uses one of the chaotic functions called Logistic Map. This map is used to enhance the Hill cipher and achieve more secure encryption key. The properties of both chaotic system and of the Hill cipher encryption key are all utilized to obtain ultimate secure systems. The proposed encryption algorithm is crypto-analyzed and compared to the standard Hill cipher algorithm. Complete evaluation for the proposed architecture is also performed which indicates the effectiveness of the proposed system. © 2011 IEEE.

关键词： Cryptography

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Adaptive Variable Selection Using Nonnegative Garrote with Application to Soft Sensor and Fault Detection

Adaptive Variable Selection Using Nonnegative Garrote with A...

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第23届过程控制会议

作者： Jian-guo Wang Chang-Chun Pan Shi-Shang Jang David Shan-Hill Wong Shyan-Shu Shieh Chan-Wei Wu School of Mechatronical Engineering and Automation Shanghai University and Shanghai Key Labof Power Station Automation Technology Shanghai 200072 China Department of Automation and Key Laboratory of System Control and Information Processing Ministry ofEducation of China Shanghai Jiao Tong University Shanghai 200240 China Department of Chemical Engineering National Tsing-Hua University Hsin-Chu 30013 Taiwan Department of Occupational Safety and Hygiene Chang Jung University Tainan 71101 Taiwan Energy & Air Pollution Control Section New Materials R&D Dept. China Steel Corporation Kaohsiung 81233 Taiwan

ring normal operations, response or quality variables of a process will follow a input-output relation that depend on certain key sensor variables. A soft-sensor with limited model size can be developed. When the process enters into a “faulty” state, the structure, of this model may change. Moreover, disturbance that is not reflected by sensor outputs may also be present. In this paper, we introduce a recursive soft-sensor modeling algorithm which employs a nonnegative garrote (NNG) variable selection procedure. This model can be used for both prediction, and detection of structural model change and the emergence of disturbance. The advantages of the proposed method were demonstrated by a simulation example and an industrial application to temperature prediction of a blast furnace hearth.

关键词： NNG(nonnegative garrote) Soft sensor Fault detection

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Simulation of performance of 4WD electric vehicle

Simulation of performance of 4WD electric vehicle

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2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011

作者： Dan, Xu Guodong, Wang Binggang, Cao Hui, Gong Institute for Electric Vehicle and System Control Xi'An Jiaotong University Xi'an 710049 China Dept. of Environmental Science and Engineering Tsinghua University Beijing 100084 China

ISBN: (纸本)9781612844855

4WD in-wheel drive electric vehicle is a research focus recently because it is feasible to improve stability and dynamic performance. Based on the secondary development of ADVISOR, this paper established the simulation model of 4WD electric vehicle and made the simulation of the vehicle. From the result of simulation, we can clearly find out that 4WD electric vehicles have better dynamic performance than the traditional ones. Moreover, the non-energy equalization module is acted on the power system of the vehicle which can enhance the energy performance and battery life. © 2011 IEEE.

关键词： Vehicle performance

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Distributed Reference Management Strategies for Networked Water Distribution systems

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IFAC Proceedings Volumes 2011年第1期44卷 8951-8956页

作者： Alessandro Casavola Emanuele Garone Francesco Tedesco DEIS – Università degli Studi della Calabria Rende(CS) 87036 ITALY Dept. of Control Engineering and System Analysis Universite libre de Bruxelles (ULB) Brussels Belgium

Abstract A distributed constrained supervisory strategy for large-scale spatially distributed systems is presented and applied to a networked water distribution system. The aim is at reconfiguring, whenever necessary in response to different supply downstream demands, the nominal set-points to the tank water levels so that all prescribed coordination and operational constraints are enforced during the system evolutions and sustainable equilibria are reached. The presented supervision strategy follows a coordination-by-constraint approach and is based on Feed-Forward Command Governor (FF-CG) ideas. The effectiveness of the strategy is shown in the final example where the supervision of an eight-tank interconnected system is considered.

关键词： Nonlinear control Distributed Predictive control Command Governors

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Comparing Approximations of the Value Function for Entry Time Optimal control

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IFAC Proceedings Volumes 2011年第1期44卷 8607-8613页

作者： Matthias Rungger Olaf Stursberg Institute of Control and System Theory Dept. of Electrical Engineering and Computer Science University of Kassel Germany

Abstract A fundamental quantity of the solution of an optimal control problem is the value function, i.e., the optimal cost-to-go function. In the general case, the function is not known exactly, but need to be approximated numerically. Most approaches to numerical approximation of the value function follow a procedure of three steps: first, the original continuous problem formulation is fully discretized; second, the discretized finite optimal control problem is solved by a shortest-path algorithm, and as third step, the solution is projected back from the finite space onto the continuous state space by using an interpolating function. This paper investigates the differences of discretization schemes and interpolating functions in this context. The performance of the computed approximations is evaluated in terms of an a-posteriori error, which is obtained from the approximating value functions. The convergence of the approximations to the true value function is proved for all considered schemes for the case that the discretization parameters are decreased to zero.

关键词： Optimal control Nonlinear systems Dynamic Programming Value Function

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