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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Chun Yuan Lin Ken-Li Lin Chuen-Der Huang Hsiu-Ming Chang Chiao Yun Yang Chin-Teng Lin Chuan Yi Tang D.F. Hsu Institute of Molecular and Cellular Biology Singapore Department of Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan Computer Center Chung-Hua University Hsinchu Taiwan Department of Electrical Engineering Hsiuping Institute of Technology Tachung Taiwan Brain Research Centre Canada Department of Computer Science National Tsing Hua University Hsinchu Taiwan Department of Computer and Information Science Fordham University New York NY USA

The classification of protein structures is essential for their function determination in bioinformatics. The success of the protein structure classification depends on two factors: the computational methods used and the features selected. In this paper, we use a combinatorial fusion analysis technique to facilitate feature selection and combination for improving predictive accuracy in protein structure classification. When applying these criteria to our previous work, the resulting classification has an overall prediction accuracy rate of 87% for four classes and 69.6% for 27 folding categories. These rates are significantly higher than our previous work and demonstrate that combinatorial fusion is a valuable method for protein structure classification.

关键词： Accuracy Support vector machines Support vector machine classification Protein engineering Neural networks computer architecture Testing Bioinformatics Amino acids Sequences

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A New Protection Scheme for Fault Location and Relay by Matrix Operation Method in Transmission Lines

A New Protection Scheme for Fault Location and Relay by Matr...

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IEEE/PES Transmission and Distribution Conference and Exhibition: Asia and Pacific

作者： X.F. Zuo H. Kuribayashi T. Inagaki K. Tsuji T. Hiyama Development Center of Marketing & Engineering Division Kyuki Company Inc. Fukuoka Japan Toyama East Synthesis Control Station Hokkaido Electrical Power Company Inc. Toyama Japan Techno Tsuji Limited Toyama Japan Department of Electrical and Computer Engineering Kumamoto University Kumamoto Japan

This paper presents additional functions of the newly developed matrix operation type protection relay in power transmission lines. The paper presents the basic principle of fault location, the function of integrated protection, corresponding of the system configuration, the regular surveillance, and the results of simulation test. The general equations, which are utilized for the fault detection and the fault location, are derived from the basic equations based on the principle of Kirchhoff's first and second laws for the study transmission system. The proposed protection relay, differing from the conventional digital ones, enable to generalize the required protection functions such as the grounding fault protection, the short-circuit fault protection, the main and the backup protection based on a equivalent circuit for the study system. The function of regular surveillance can be realized to satisfy the voltage balance calculated by the off-line constants and the estimated on-line parameters synthetically. It ensures effectively the reliability of the proposed protection system. The new functions are developed naturally from the principles of the matrix operation type protection relay. Simulation studies and laboratory experiments have clarified the fact that the proposed protection scheme provides an innovative way to solve many problems still remained

关键词： Transmission line matrix methods Fault location Protective relaying Power system protection Power system relaying Power transmission lines Surveillance Equations Circuit faults System testing

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Design and Implement the Stimuli Capsule at In-vitro Experiment

Design and Implement the Stimuli Capsule at In-vitro Experim...

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IEEE Region 10 International Conference TENCON

作者： S. H. Woo K. W. Yoon J. H. Lee Y. K. Moon C. H. Won T. W. Kim H. C. Choi J. H. Cho School of Electronic Engineering and Computer Science Kyungpook National University South Korea Department of Computer Control & Electrical Engineering Kyungil University South Korea College of Veterinary Medicine Department of physiology Kyungpook National University South Korea Advanced Research Center for Recovery of Human Sensibility Kyungpook National University South Korea

Recently, the capsule endoscope has been developed to observe image from the inside intestine. Such a capsule endoscope does not have locomotion or hold by it self. To get proper diagnosis and meditation, it is necessary to control capsule from outside to enable to guide locomotion. The designed and implemented capsule has feasibility to contracts the small intestine by electrical stimulus from stimulus pad. When the small intestine is contracted by electrical stimulus, the capsule can move to opposite direction which can boost moving speed of the capsule or change moving direction. The implemented stimuli capsule always monitors excessive energy transmit and automatically shut down electrical stimuli to make more secure. Also the stimuli capsule goes to stand by mode to save battery, and reset by comparator circuit which is connected to two stimulus pad. To verify the design and implement stimuli capsule, in-vitro experiments are performed with pig's small intestine.

关键词： In vitro Intestines Endoscopes Energy consumption Batteries Circuits Valves Moon Design engineering computer science

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The Impact of Surface Defects on SiC Schottky and Ohmic Contact Formation

The Impact of Surface Defects on SiC Schottky and Ohmic Cont...

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International Symposium Semiconductor Device Research (ISDRS)

作者： L.J. Brillson S.P. Tumakha M. Gao D.J. Ewing L.M. Porter R.S. Okojie M. Zhang P. Pirouz Q. Wahab X. Ma T.S. Sudharshan T. Onishi S. Tsukimoto M. Murakami Center for Materials Research The Ohio State University Columbus OH USA Department of Physics Department of Physics Ohio State Uinversity Columbus OH USA Department of Electrical and Computer Engineering Center for Materials Research The Ohio State University Columbus OH Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh PA USA NASA Glenn Research Center Cleveland OH USA Department of Materials Science and Engineering Case Western Reserve University Cleveland OH USA Department of Physics and Measurement Technology Linköping University Linköping Sweden MaxMile Technologies LLC Lexington SC USA Department of Electrical Engineering University of South Carolina Columbia SC USA Department of Materials Science and Engineering Kyoto University Kyoto Japan

Silicon carbide is a leading semiconductor for high power, high temperature electronics, yet SiC devices still face problems of electrical contact control and reproducibility. Recent work worldwide shows that point and extended defects in SiC as well as chemical reactions at metal-SiC interfaces can influence contact transport properties. Yet Schottky barrier and ohmic contact formation at the intimate metal-SiC junction are relatively unexplored on the microscopic level. We have used depth-resolved cathodoluminescence spectroscopy (DRCLS) and Auger electron spectroscopy (AES) to measure the optical emissions of defects near 4H-SiC surfaces and metallized interfaces on a nanometer scale. These techniques reveal that a variety of metals on clean 4H-SiC surfaces in ultrahigh vacuum (UHV) promote the formation of mid-gap defects extending only nanometers away from the junction. These states vary in their ranges of depth and depend sensitively on interface reactivity and subsequent UHV annealing

关键词： Silicon carbide Ohmic contacts Spectroscopy Surface cleaning Lead compounds Temperature control Reproducibility of results Chemicals Schottky barriers Microscopy

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Learning distributed grasp in presence of redundant agents

Learning distributed grasp in presence of redundant agents

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： A.H. Elahibakhsh M. Nili Ahmadabadi F. Janabi-Sharifi B. Nadjar Araabi AI & Robotics Laboratory Center of Excellence for Control and Intelligent Processing Department of Electrical and Computer Eng. Institute for Studies on Theoretical Physics and Mathematics University of Tehran Tehran Iran Robotics and Manufacturing Automation Lab Department of Mechanical and Industrial Engineering Ryerson University Toronto ONT Canada

Learning distributed object grasp by a group of robots with redundant members is the main focus of this paper. In Elahibakhsh, A. H., et al. (2004), we tackled the problem of learning form closure grasp for planar convex objects by multiple non-communicating robots without any information about the shape of objects. In this paper, the problem in presence of redundant agents is investigated. Agents' states and actions are designed such that the group learns grasping different objects using Q-learning method. As the environment is not intelligent enough to assess each agent's effect on the team performance, a credit assignment algorithm based on knowledge evaluation is designed. The proposed method considers the environment credit for the team, number of redundant agents, and the expertness level of each agent in its credit assignment. Applicability of the designed approach is verified through a set of simulations. It is shown that the team learns grasping different objects. Therefore, it is expected that the proposed method can be extended for distributed grasp of deformable objects

关键词： Intelligent robots Learning Robot sensing systems Shape Cognitive robotics Robotics and automation Intelligent agent Algorithm design and analysis Grasping Redundancy

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III-V Multi-Junction Materials and Solar Cells on Engineered SiGe/Si Substrates

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MRS Online Proceedings Library 2005年第1期836卷 L6.2.1-L6.2.12页

作者： Ringel, Steven A. Andre, Carrie L. Lueck, Matthew Isaacson, David Pitera, Arthur J. Fitzgerald, Eugene A. Wilt, David M. Department of Electrical and Computer Engineering The Ohio State University Columbus USA Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge USA Photovoltaic and Space Environments Branch NASA Glenn Research Center Cleveland USA

The monolithic integration of high efficiency III-V compound solar cell materials and devices with lower-cost, robust and scaleable Si substrates has been a driving force in photovoltaics (PV) basic research for decades. Recent advances in controlling mismatch-induced defects that result from structural and chemical differences between III-V solar cell materials and Si using a combination of SiGe interlayers and monolayer-scale control of III-V/IV interfaces, have led to a series of fundamental advances at the material and device levels, which establish that the great potential of III-V/Si PV is within reach. These include demonstrations of GaAs epitaxial layers on Si that are anti-phase domain-free with verified dislocation densities at or below 1×106 cm−2 and negligible interface diffusion, minority carrier lifetimes for GaAs on Si in excess of 10 ns, single junction GaAs-based solar cells on Si with open circuit voltages (Voc) in excess of 980 mV, efficiencies beyond 18%, and area-independent PV characteristics up to at least 4 cm2. These advances are attributed in large part to the use of a novel “engineered Si substrate” based on compositionally-graded SiGe buffers such that a high-quality, low defect density, relaxed, “virtual” Ge substrate could be developed that can support lattice-matched III-V epitaxy and thus merge III-V technology based on the GaAs (or Ge) lattice constant with Si wafers. This paper focuses on recent results that extend this work to the first demonstration of high performance III-V dual junction solar cells on SiGe/Si. Open circuit voltages in excess of 2 V at one-sun have been obtained for the conventionally “lattice-matched” In0.49Ga0.51P/GaAs dual junction cells on inactive, engineered SiGe/Si; to our knowledge is the first demonstration of > 2V solar power generation on a Si wafer. Comparisons with identical cells on GaAs substrates reveal that the Voc on engineered Si retains more than 94% of its homoepitaxial value, and that at

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Improvement of low frequency oscillation damping in power systems via an adaptive critic based neurofuzzy controller 8th

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8th International Conference on Knowledge-Based Intelligent Information and engineering Systems, KES 2004

作者： Rashidi, Farzan Moshiri, Behzad Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering University of Tehran Iran

ISBN: (纸本)9783540232056

This paper proposes an Adaptive Critic Based Neuro-Fuzzy controller (ACBNFC) to Thyristor controlled Series Capacitor (TCSC), which might have a significant impact on power system dynamics. The function of the ACBNFC is to control a firing angle of the TCSC. The proposed method is used for damping the low frequency oscillations caused by disturbances such as a sudden change of small or large loads or an outage in the generators or transmission lines. To evaluate the usefulness of the proposed method, the computer simulation for single machine infinite system is performed and compared with fuzzy PD controller. Obtained results show the proposed control strategy is very robust, flexible and could be used to get the desired performance levels. The response time is also very fast. Simulation results that have been compared with fuzzy PD controller show that our method has the better control performance than fuzzy PD controller. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Damping

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Hybrid systems: Generalized solutions and robust stability 6

Hybrid systems: Generalized solutions and robust stability

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6th IFAC Symposium on Nonlinear control Systems, NOLCOS 2004

作者： Goebel, Rafal Hespanha, Joao Teel, Andrew R. Cai, Chaohong Sanfelice, Ricardo Center for Control Engineering and Computation and Electrical and Computer Engineering Department University of California Santa BarbaraCA93106-9560 United States

Robust asymptotic stability for hybrid systems is considered. For this purpose, a generalized solution concept is developed. The first step is to characterize a hybrid time domain that permits an efficient description of the convergence of a sequence of solutions. Graph convergence is used. Then a generalized solution definition is given that leads to continuity with respect to initial conditions and perturbations of the system data. This property enables new results on necessary conditions for asymptotic stability in hybrid systems. Copyright © 2004 IFAC.

关键词： Lyapunov functions

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Sliding mode congestion control in differentiated service communication networks

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2nd International Conference on Wired/Wireless Internet Communications, WWIC 2004

作者： Ebrahimirad, Hassan Yazdanpanah, M.J. Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering University of Tehran Iran

ISBN: (纸本)3540209549

The rapid growth of the Internet and increased desmand to use the Internet for voice and video applications necessitate the design and utilization of new Internet architectures with effective congestion control algorithms. As a result, the Differentiated Service (Diff-Serv) architectures were proposed to deliver Quality of Service (QoS) in TCP/IP networks. Network congestion control remains a critical and high priority issue, even for the present Internet architecture. The aim of this paper is to design a robust active queue management system to secure high utilization, bounded delay and loss, while the network complies with the demands each traffic class sets. To this end, variable structure control theory is used and a sliding mode congestion controller is designed. Simulation results of the proposed control action demonstrate the effectiveness of the controller in providing robust queue management system. © Springer-Verlag Berlin Heidelberg 2004.

关键词： controllers

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Authors' Reply to Comments on “Variable-Structure PID control to Prevent Integrator Windup”

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IEEE Transactions on Industrial Electronics 2004年第3期51卷 738-739页

作者： Scottedward Hodel, A. Hall, Charles E. Department of Electrical and Computer Engineering Auburn University Auburn AL 36849-5201 United States Control Systems Group NASA Marshall Space Flight Center Huntsville AL 35812 United States

For comments by R.J. Mantz and H. De Battisa see ibid. (vol. 51, p. 736-38, June 2004) . For original paper by A. S. Hodel and C. E. Hall see ibid.(vol. 48, p. 442-51, Apr. 2001).

关键词： control systems design methodology

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