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Effects of spatial distribution of the electron density functional in crystals

Bulletin of the Lebedev Physics institute 2007年第5期34卷 127-134页

作者： G. V. Grushevskaya L. I. Gursky P. N. Luskinovich I. A. Lubashevskii Faculty of Physics Belarusian State University Minsk Belarus Department of Technology of Electronic Devices Faculty of Computer-Aided Design Belarusian State University of Informatics and Radioelectronics Minsk Belarus Prokhorov General Physics Institute Russian Academy of Sciences Moscow Russia

The variational principle was used within the concept of quasiparticles to determine one-electron states, taking into account effects of nonlocality of the electron density functional in electromagnetic fields.

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Investigations of the Use of PosEye for Position Measurements

Investigations of the Use of PosEye for Position Measurement...

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Student Conference on Research and Development (SCOReD)

作者： D. V. Viswacheda P. Surireddy M. S. Arifianto M. Y. Hamid E. M. Husni L. Barukang School of Engineering and Information Technology Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia Department of Technology Mathematics and Computer Science University West Trollhattan Sweden School of Electrical Engineering and Informatics Institute of Technology at Bandung Jawa Barat Indonesia

The PosEye system is basically a position measurement system which takes images of the reference. The infra-red LEDs which emits IR lights is captured by the CCD and is used as the reference. In this system the absolute positioning and orientation were made with the help of a PosEye. The PosEye is normally fixed on a robot arm or the object which requires orientation of its own position in correspondence to its reference points in the working area. This paper discusses general ideas about reference markers, set-up procedures, and issues behind the sensor. This mainly includes the principles of PosEye sensor, basics of vision and cameras. The paper details the experiments in which results were obtained through the PosEye system with the help of electronics and PosEye camera. In the experimental setup, the connection of PosEye with the electronic application is presented, the usage of PosEye and the robot control system communication with the PosEye system using coordinate system. The working of the PosEye system is observed by taking images on the reference plate and finding the co-ordinates (x, y, z). The manipulation of the obtained images to the robot for a movement is also studied.

关键词： Position measurement Cameras Robot vision systems Robot control Charge coupled devices Robot sensing systems Robot kinematics Educational institutions Light emitting diodes Virtual reality

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Nonlinear Dynamics in Direct Torque Controlled Induction Machines Analyzed by Recurrence Plots

Nonlinear Dynamics in Direct Torque Controlled Induction Mac...

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2007 European Conference on Power Electronics and Applications, vol.9

作者： Zoltan Suto Istvan Nagy Eisuke Masada Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Hungary Science University of Tokyo Noda Chiba Japan

ISBN: (纸本)9789075815115;9075815115

The source of nonlinearity are the hysteresis comparators and dependence of switchings on state variables in Direct Torque Controlled (DTC) Induction Machines (IM). The nonlinearity generates some strange operation states. They are revealed, analyzed by bifurcation diagram and recurrence plots both in motoring and generating operations.

关键词： Voltage Source Converter (VSC) Direct torque and flux control Bifurcations Chaotic state Recurrence plots

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On A Web-Graph-Based Micronetwork Architecture for SoCs

On A Web-Graph-Based Micronetwork Architecture for SoCs

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50th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS'07), vol.3

作者： Ling Wang Shouye Piao Yingtao Jiang Juyeon Jo Lihong Zhang Department of Computer Science Harbin Institute of Technology Harbin Heilongjiang China Department of Electrical and Computer Engineering University of Nevada Las Vegas NV USA School of Informatics University of Nevada Las Vegas NV USA Engineering and Applied Science Memorial University of Newfoundland Saint John's NEW Canada

From System-on-chip to Network-on-chip, the main dissimilarity is replacing the bus with the network. How connect, how formative network function is related to topology structure. In this paper we propose a topology structure for NoC, and compare it with mesh, torus, the fat tree, octagon, spidergon topology networks by five kinds of mainly properties: node degree, network diameter, connectivity, the average most short-circuit path and the average shortest wire length. Experiment results show that this topology has better performance on cost/performance layout.

关键词： Network-on-a-chip Network topology Integrated circuit interconnections System-on-a-chip Delay effects Wiring Power system interconnection Protocols computer architecture computer science

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Linking Protein Mass with Function via Organismal Massome Networks

Linking Protein Mass with Function via Organismal Massome Ne...

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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Gil Alterovitz Eugenia Lyashenko Michael Xiang Marco F. Ramoni Health Sciences and Technology Harvard Medical School Boston MA USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA Department of Biomedical Informatics Columbia University New York NY USA Division of Health Sciences and Technology Harvard Medical School and Massachusetts Institute of Technology Boston MA USA

With the human genome sequenced, attention has been shifting to proteins and their function. Several technologies including mass spectrometry and gel electrophoresis have traditionally been used to study proteins. These technologies rely on proteins' masses to characterize and/or identify them. Once identified, the discovered proteins' are often analyzed for their functional relevance. In this paper, we present an alternative approach to studying protein function directly, based on protein mass. By analyzing proteins with similar mass ranges (bins), we discovered that certain biological functions are associated with specific mass bins more frequently than would be expected by chance. Biological functional classes found in this manner could be seen across the three examined organisms: human, worm and fly. We found no sequence-based homology across significant mass-function proteins in the three different organisms. This investigation leads to useful property that the mass-based biological functional classes are preserved across the organisms. Thus, this paper describes a potential constraint for evolution of similar function based on mass constraints. Finally, this work yields a roadmap for experimental design for functional exploration of proteomes in mass-based technologies such as gel electrophoresis and mass spectrometry.

关键词： Joining processes Proteins Organisms Humans Mass spectroscopy Electrokinetics Genomics Bioinformatics Evolution (biology) Design for experiments

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DERIVING EFFICIENT MOBILE AGENT ROUTES IN WIRELESS SENSOR NETWORKS WITH NOID ALGORITHM

DERIVING EFFICIENT MOBILE AGENT ROUTES IN WIRELESS SENSOR NE...

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18th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2007), vol.3

作者： Aristides Mpitziopoulos Damianos Gavalas Charalampos Konstantopoulos Grammati Pantziou Department of Cultural Technology and Communication University of Aegean Mytilene Greece Research Academic Computer Technology Institute and Department of Computer Engineering and Informatics University of Patras Rio Greece Department of Informatics Technological Education Institute of Athens Athens Greece

In this article, we consider the problem of calculating an appropriate number of near-optimal (subject to a certain routing objective) routes for mobile agents (MAs) that incrementally fuse the data as they visit the nodes in a distributed sensor network. We propose an improved heuristic algorithm which computes an approximate solution to the problem by suggesting an appropriate number of MAs and constructing near-optimal itineraries for each of them. The performance gain of our algorithm over alternative approaches both in terms of cost and task completion latency is demonstrated by a quantitative evaluation and also in simulated environments through a Java-based tool.

关键词： Mobile agents Wireless sensor networks Routing Fuses Sensor fusion Heuristic algorithms Performance gain Costs Delay Computational modeling

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Opto-Mechanical Filtering Applied for Orientation and Length Selective Contour Detection

Opto-Mechanical Filtering Applied for Orientation and Length...

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Annual Conference of Industrial Electronics Society

作者： B. Resko P. Baranyi P. Korondi H. Hashimoto Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Institute of Industrial Sciences University of Tokyo Tokyo Japan

Cognitive informatics is a very hot topic today, trying to provide solutions to problems in computation that are easily solved by the brain but are hard for a computer. The information processing properties of the brain are taken as the basis for such artificial systems. The first step of visual information processing, the extraction of orientation selective contours, is done in the primary visual cortex. A similar, orientation based filtering can be the first step in many vision systems of cognitive informatics. This paper presents a new approach to orientation selective contour detection. Oriented motion blur is used to filter for the desired orientations. The motion blur operation is performed before digitalization, using a vibrating mirror. The proposed technique not only provides a very high speed, high resolution contour detector, but also solves the problem of contour discontinuities.

关键词： Filtering Cognitive informatics Data mining Information processing Neurons Automation Machine vision Mirrors Humans computer architecture

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Minitrack: Advanced Data Management Tools for Biomedical informatics

Minitrack: Advanced Data Management Tools for Biomedical Inf...

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Annual Hawaii International Conference on System Sciences (HICSS)

作者： Hesham H. Ali Simon Sherman Department of Computer Science College of Information Science and Technology University of Nebraska Omaha Omaha NE USA Eppley Cancer Institute Nebraska Informatics Center for Life Sciences University of Nebraska Medical Center Omaha NE USA

Further progress of Biology and Medical Sciences requires successful integration with Computational and Information Sciences. The papers of this Mini-track provide a diverse spectrum of innovative ways of how such integration can be achieved. The focus of this mini-track is on the development and implementation of advanced data management tools in Biomedical informatics. The first three papers in the mini-track focus on the development and implementation of computational and IT tools for Biomedical informatics, while the forth paper presents advanced statistical methods for data analysis.

关键词： Biomedical informatics Cancer Bioinformatics DNA Genetics Biomedical computing Statistical analysis Sequences Biological cells Genomics

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Context Dependent Reconstructive Communication

Context Dependent Reconstructive Communication

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International Symposium on Computational Intelligence and Intelligent informatics, ISCIII

作者： Laszlo T. Koczy Tamas D. Gedeon Department of Computer Science Australian National University Canberra Australia Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Institute of Mechanical Electrical Engineering and Information Technology Széchenyi István University Gyor Hungary

Fuzzy communication contains vague or imprecise components and it might lack of abundant information. If two entities (man or machine) are communicating by a fuzzy channel, it is necessary that both ends possess the same codebook. The codebook might partly consist of common knowledge but it usually requires a context dependent part that is either learned by the communicating entity or defined by expert knowledge. Possibly it is continuously adapting to the input information. If such a codebook is not available or it contains too imprecise information, the information to be transmitted might be too much distorted and might lead to misunderstanding, misinterpretation and serious damage. If however the quality of the available codebook is satisfactory, the communication will be efficient i. e., the original contents of the message can be reconstructed. At the same time it is cost effective, as fuzzy communication is compressed as compared to traditional "abundant communication".

关键词： Context Dairy products Telephony Information technology computer science informatics Environmental economics Laboratories Communication effectiveness Humans

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REQUIREMENTS FOR AN EVENT-BASED SIMULATION PACKAGE FOR GRID SYSTEMS

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Journal of Interconnection Networks 2007年第2期8卷 163-178页

作者： FATOS XHAFA JAVIER CARRETERO LEONARD BAROLLI ARJAN DURRESI Polytechnic University of Catalonia Department of Languages and Informatics Systems C/Jordi Girona 1-3 08034 Barcelona Spain . Polytechnic University of Catalonia Department of Computer Architecture C/Jordi Girona 1-3 08034 Barcelona Spain Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan Department of Computer Science Louisiana State University 298 Coates Hall Baton Rouge LA 70803 USA

In this paper we present a study on the requirements for the design and implementation of simulation packages for Grid systems. Grids are emerging as new distributed computing systems whose main objective is to manage and allocate geographically distributed computing resources to applications and users in an efficient and transparent manner. Grid systems are at present very difficult and complex to use for experimental studies of large-scale distributed applications. Although the field of simulation of distributed computing systems is mature, recent developments in large-scale distributed systems are raising needs not present in the simulation of the traditional distributed systems. Motivated by this, we present in this work a set of basic requirements that any simulation package for Grid computing should offer. This set of functionalities is obtained after a careful review of most important existing Grid simulation packages and includes new requirements not considered in such simulation packages. Based on the identified set of requirements, a Grid simulator is developed and exemplified for the Grid scheduling problem.

关键词： Grid systems event-based simulation requirements scheduling

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