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2004 5th Asian control Conference

作者： Haeri, M. Rad, A.H. Mohsenian Advance Control Systems Lab. Electrical Engineering Department Sharif University of Technology Tehran Iran

ISBN: (纸本)0780388739

Transmission control Protocol (TCP) uses multiple timers to do its work. The most important of these is the retransmission timer. In this paper, the TCP retransmission timer adjustment mechanism is approached from a system point of view and a new mechanism is proposed. A simple recursive system identification algorithm is used to capture both time variant and time invariant Internet behavior. Also a dynamic model-based Round-Trip Time (RTT) predictor was provided. Based on network simulation and real Internet data collection, it was observed that when the retransmission timer is adjusted by the proposed predictor instead of the traditional RTT estimator, performance increased significantly.

关键词： Network protocols

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Journal of Information Science and engineering: Editorial notice

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Journal of Information Science and engineering 2005年第5期21卷 i-ii页

作者： Lee, Der-Tsai Amato, Nancy M. Chang, Shih-Fu Chen, Homer H. Chen, Tsuhan Hsu, Tsan-Sheng Hwang, Jenq-Neng Kuo, Sy-Yen Kuo, Tei-Wei Li, Chung-Sheng Tokuyama, Takeshi Wing, Jeannette Wu, Tzong-Chen Yen, John Computer Science at Texas A and M University United States Parasol Laboratory United States IEEE Transactions on Parallel and Distributed Systems Computing Research Association's Committee on the Status of Women in Computing Research CRA-W's Distributed Mentor Program United States Department of Electrical Engineering Columbia University United States Lab. United States College of Electrical Engineering and Computer Science National Taiwan University Taiwan IEEE Transactions on Circuits and Systems for Video Technology IEEE Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA United States ACM ACM SIGACT IEEE Computer Society IICM Austria Research and Development of the Department Multimedia Signal Processing Technical Committee IEEE Signal Processing Society United States IEEE Transactions on Circuits and systems for Video Technology College of Electrical Engineering and Computer Science National Taiwan Ocean University Keelung Taiwan Department of Electrical Engineering National Taiwan University Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan IEEE Technical Committee on Real-Time Systems Computer Science Division IBM T.J. Watson Research Center United States IBM Research Division Graduate School of Information Sciences Tohoku University Japan ACM IPSJ Mathematical Society of Japan Japan Department of Computer Science Computer Science Department Carnegie Mellon University United States National Academies of Science's Computer Science and Telecommunications Board United States Microsoft's Trustworthy Academic Advisory Board Intel Research Pittsburgh's Advisory Board United States Dartmouth's Institute for Security Technology Studies Advisory Committee Canada Sloan Research Fellowships Program Committee United States ACM Taiwan China Information Sciences and Technology Pennsylvania State University United States Laboratory for Intelligent Agents Penn State's School of Info

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The velocity curve for evenly distributing process based on the BP neural network

The velocity curve for evenly distributing process based on ...

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WCICA 2004 - Fifth World Congress on intelligent control and Automation, Conference Proceedings

作者： Yang, Guangyou Zhou, Guozhu Chen, Dingfang Lab. of Intelligent Mfg. and Control Wuhan University of Technology Wuhan 430060 School of Mechanical Engineering Hubei Polytechnic University Wuhan 430068

There is often over-vibration during high speed dehydrating in industrial washer, because the velocity curve is not suitable for evenly distributing of washing in the roller. The process of evenly distributing was analyzed. A model of evenly distributing velocity curve based on BP neural network was founded with the character of nonlinear mapping and generalization of neural network. Lots of experiments were made with a different weight and property of cloth. The results show that the designed velocity curve has perfect applicability.

关键词： Neural networks

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Structurally regular unimodular filter banks

Structurally regular unimodular filter banks

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2004 IEEE 11th Digital Signal Processing Workshop and 2nd IEEE Signal Processing Education Workshop

作者： Kumar, Rohit Chen, Ying-Jui Oraintara, Soontorn Amaratunga, Kevin University of Texas at Arlington Electrical Engineering Dept. Arlington TX United States Intelligent Engineering Systems Lab. Massachusetts Inst. Technology Cambridge MA 02139 United States

ISBN: (纸本)0780384342

In this paper, we present the structural conditions for imposing regularity onto first-order unimodular filter banks (a.k.a. lapped unimodular transforms, LUT). For this purpose, we propose to parameterize non-singular matrices using a special lattice structure by which rational-coefficient unimodular filter banks can readily be designed. We consider two types of LUT factorizations and derive the corresponding structural conditions for regularity. Consequently, regular first-order unimodular filter banks can be designed using unconstrained optimizations, as the proposed structures always guarantee regularity. Design examples of regular first-order unimodular filter banks are presented to illustrate the proposed theory. © 2004 IEEE.

关键词： Wave filters

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Characterization of regular linear-phase paraunitary filter banks using dyadic-based structures

Characterization of regular linear-phase paraunitary filter ...

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2004 IEEE International Symposium on Circuits and systems - Proceedings

作者： Amaratunga, Kevin Chen, Ying-Jui Oraintara, Soontorn Intelligent Engineering Systems Lab. Massachusetts Inst. Technology Cambridge MA 02139 United States Electrical Engineering Department Univ. Texas at Arlington Arlington TX 76010 United States

We re-examine the design of structurally regular linear-phase (LP) paraunitary filter banks (PUFBs) via a general framework without the LP constraint, and show that by a suitable choice of parameterization, the general regularity theory simplifies significantly under the LP assumption. A new geometric condition for regularity is presented which is essentially equivalent to but simpler than that in [1]. A connection between the general-purpose dyadic-based building block and the order-one LP building block used in the GenLOT structure is established.

关键词： FIR filters

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Static output feedback H∞ controller design for fuzzy systems subject to sensor nonlinearities

Static output feedback H∞ controller design for fuzzy syste...

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2004 IEEE International Conference on systems, Man and Cybernetics, SMC 2004

作者： Yuan, Xiao-Hu Lu, Bin He, Youjin Sun, Fu-Chun Dept. of Control Engineering Nav. Aero. Engineering Academy Yantai Shandong Province China State Key Lab. Intelligent T./S. Tsinghua University Beijing China

In this paper, we consider the design of static output feedback H∞ controller for Takagi-Sugeno fuzzy systems subject to sensor nonlinearities. The control problem is reduced to a feasibility problem of bilinear matr... 详细信息

ISBN: (纸本)0780385667

关键词： Fuzzy control

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M-channel lifting structure for unimodular filter bank

M-channel lifting structure for unimodular filter bank

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2004 IEEE International Symposium on Circuits and systems - Proceedings

作者： Kumar, Rohit Chen, Ying-Jui Oraintara, Soontorn Amaratuga, Kevin Department of Electrical Engineering University of Texas at Arlington 416 Yates St. Arlington TX 76019-0016 United States Intelligent Engineering Systems Lab. Massachusetts Inst. Technology Cambridge MA 02139 United States

We extend the method of lifting from M-channel paraunitary filter banks (PUFB) to M -channel unimodular filter banks. In particular, the lifting factorizations of Type-I and Type-II building blocks for the first-order unimodular matrices are presented, where the McMillan minimality is preserved. The proposed factorizations continue to have unity diagonal scaling, and perfect reconstruction (PR) is thus guaranteed under finite precision. Using degree-one unimodular building blocks, we present the design of first-order unimodular transforms (a.k.a. lapped unimodular transform, or LUT) and their lifting factorizations. Muitiplierless (while reversible) implementations of the resulting LUT are obtained by dyadic approximation of the lifting coefficients.

关键词： FIR filters

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Internet-based obstacle avoidance of mobile robot using a force-reflection

Internet-based obstacle avoidance of mobile robot using a fo...

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2004 IEEE/RSJ International Conference on intelligent Robots and systems (IROS)

作者： Jin, Tae Seok Lee, Jang Myung Hashimoto, Hideki Intelligent Control System Lab. IIS University of Tokyo Tokyo Japan Dept. of Eletronics Engineering Pusan National University Busan Korea Republic of Institute of Industrial Science University of Tokyo Tokyo Japan

ISBN: (纸本)0780384636

The possibility of operating in remote environments by means of teleoperated systems has always been considered of relevant interest in robotics. For this reason, in this paper, the relationship between a slave robot and the uncertain remote environment is proposed as the impedance to generate the virtual force to feed back to the operator. For the control of a teleoperated mobile robot equipped with camera, the teleoperated mobile robot take pictures of remote environment and sends the visual information back to the operator over the Internet. Because of the limitation of communication bandwidth and narrow view-angles of camera, it is not possible to watch the environment clearly, especially shadow and curved areas. To overcome this problem, the virtual force is generated according to both the distance between the obstacle and robot and the approaching velocity of the obstacle. This virtual force is transferred back to the master over the Internet and the master, which can generate force, enables a human operator to estimate the position of obstacle in the remote environment. By holding this master, in spite of limited visual information, the operator can feel the spatial sense against the remote environment. This force reflection improves the performance of a teleoperated mobile robot significantly.

关键词： Mobile robots

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Synthesis of H2 guaranteed cost fuzzy controller for missile altitude system via linear matrix inequalities

Synthesis of H2 guaranteed cost fuzzy controller for missile...

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2004 IEEE International Conference on systems, Man and Cybernetics, SMC 2004

作者： Yuan, Xiao-Hu Ren, Jian-Cun He, You-Jin Sun, Fu-Chun Dept. of Control Engineering Nav. Aero. Engineering Academy Yantai Shandong province China State Key Lab. Intelligent T. Dept. of Comp. Sci. and Technolgy Tsinghua University Beijing China

ISBN: (纸本)0780385667

This paper deals with H2 guaranteed cost (GC) fuzzy output feedback control problem for missile altitude control system. First, the Takagi-Sugeno fuzzy model is employed to represent the dynamics of the missile altitude control system. Next, we present necessary and sufficient conditions for the existence of a quadratically stabilizing fuzzy output feedback controller which also assure H2 guaranteed cost performance on a fuzzy dynamic system where the uncertainty is of the norm bounded type. The conditions are presented as a collection of linear matrix inequalities. A simulation on the missile altitude system is given to illustrate the effectiveness of the proposed design method. © 2004 IEEE.

关键词： control equipment

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Adaptive noise cancellation using IIR-based fuzzy systems

Adaptive noise cancellation using IIR-based fuzzy systems

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2004 IEEE International Conference on systems, Man and Cybernetics, SMC 2004

作者： Li, Zhengrong Er, Meng Joo S1-B4a-01 Computer Control Lab. Sch. of EEE Nanyang Avenue 50 Singapore 639798 Singapore Intelligent Systems Centre Research TechnoPlaza Border X Block Singapore 637533 Singapore

ISBN: (纸本)0780385667

In order to solve the Adaptive Noise Cancellation (ANC) problem, a new IIR-based fuzzy system is proposed in this paper. By virtue of its short-term memory embedded in the input layer and the IIR-based long-term memory in the consequent part, the proposed approach can handle nonlinear and dynamic ANC problems very well. It has the non-recurrent structure so that there is no feedback from the output layer to the input layer. Therefore, global stability analysis for the system is evitable. Moreover, the size of the networks is parsimonious because no extra input variables are introduced as the other recurrent networks did. Another significance of the proposed fuzzy system is that the system dynamics are implemented by the individual linear and transversal IIR filters in the consequent part of the fuzzy system. This makes mathematical analysis and practical applications feasible.

关键词： Problem solving

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