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Mediterranean Electrotechnical Conference (MELECON)

作者： G. Botella E. Ros M. Rodriguez A. Garcia S. Romero Department of Computer Architecture and Automation Universidad Complutense de Madrid Madrid Spain Department of Comp. Architecture and Technology University of Granada Granada Spain Department of Electronics and Computer Technology University of Granada Granada Spain Department of Computer Science University of Jaén Jaen Spain

Nature has optimized the processing of visual information, especially in primates. The estimation of optical flow is a complex task that gives information about ego-motion, and permits tracking objects from a given scene. The multi-channel spatio-temporal filtering required to detect motion is suitable for a parallel implementation on reconfigurable circuitry. We detail here the design of a neuromorphic FPGA implementation of the pre-processing stages for optical flow estimation that permits highly parallel real-time filtering

关键词： Biomedical optical imaging Image motion analysis Hardware Optical filters Layout Filtering Motion detection Circuits Optical design Neuromorphics

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A study on the possibility of thermoelectric heating/cooling in buildings

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International Journal of Power and Energy Systems 2006年第3期26卷 250-258页

作者： Liang, J. Kin, Y. Du, R.-X. Chan, Y.-L. Jin-Yeu, T. Department of Automation and Computer Aided Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong Department of Architecture Chinese University of Hong Kong Shatin N.T. Hong Kong

This paper presents a study on the use of thermoelectric heating and cooling in buildings. The system, called Smart Wall, consists of thermoelectric (TE) modules, a power supply (including a rechargeable battery and an AC power rectifier), a water circulation system, and a computer control system. Smart Wall has three functions: heating, cooling, and power generation. To improve its coefficient of performance (COP), it uses the so-called symbiotic generation to maximize the energy usage. In order to investigate the performance of Smart Wall, a theoretical model is first developed. Based on computer simulation, it is found that under a typical condition, Smart Wall can achieve a COP of 0.605 for cooling and 0.875 for heating. A small experiment model of 1.8m × 1.2m × 0.4m is also built. The experiment result confirms the simulation results. Because Smart Wall is clean, quiet, and safe, if the COP can be further improved the system would have great potential in the future.

关键词： Cooling systems

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An Efficient Pricing Based Protocol for Broadcasting in Wireless Ad hoc Networks

An Efficient Pricing Based Protocol for Broadcasting in Wire...

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International Conference on Communication Systems Software and Middleware (COMSWARE)

作者： N.R. Suri Y. Narahari D. Manjunath Department of Computer Science and Automation Indian Institute of Science Bangalore India Networks Architecture Laboratory Electrical and Communications Engineering Indian Institute of Science Bangalore India

In many applications of wireless ad hoc networks, wireless nodes are owned by rational and intelligent users. In this paper, we call nodes selfish if they are owned by independent users and their only objective is to maximize their individual goals. In such situations, it may not be possible to use the existing protocols for wireless ad hoc networks as these protocols assume that nodes follow the prescribed protocol without deviation. Stimulating cooperation among these nodes is an interesting and challenging problem. Providing incentives and pricing the transactions are well known approaches to stimulate cooperation. In this paper, we present a game theoretic framework for truthful broadcast protocol and strategy proof pricing mechanism called immediate predecessor node pricing mechanism (IPNPM). The phrase strategy proof here means that truth revelation of cost is a weakly dominant-strategy (in game theoretic terms) for each node. In order to steer our mechanism-design approach towards practical implementation, we compute the payments to nodes using a distributed algorithm. We also propose a new protocol for broadcast in wireless ad hoc network with selfish nodes based on IPNPM. The features of the proposed broadcast protocol are reliability and a significantly reduced number of packet forwards compared to the number of network nodes, which in turn leads to less system-wide power consumption to broadcast a single packet. Our simulation results show the efficacy of the proposed broadcast protocol

关键词： Pricing Wireless application protocol Broadcasting Mobile ad hoc networks Game theory Power system reliability Intelligent networks Costs Distributed computing Distributed algorithms

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Remote monitoring and control system of intelligent building based on LonWorks and Web

Remote monitoring and control system of intelligent building...

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World Congress on Intelligent Control and automation (WCICA)

作者： Jie Chen Meisheng Xue Demin Sun Xiaohong He Department of Computer and Information Engineering Anhui Institute of Architecture and Industry Hefei China Department of Automation University of Science and Technology Hefei China

ISBN: (纸本)0780382730

The development of intelligent building and the network technology involved were introduced. The scheme of remote monitoring and control system of intelligent building based on LonWorks and Web was presented. The framework and working principle were analyzed. The key technology involved was studied. A prototype system was established according to the above scheme. The results of experiment show that the system works well.

关键词： Remote monitoring Control systems Intelligent systems Intelligent control Intelligent structures Intelligent networks Sun Helium computer networks computer industry

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A framework for reconfigurable computing: Task scheduling and context management - A summary

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IEEE Circuits and Systems Magazine 2002年第4期2卷 48-51页

作者： Maestre, Rafael Kurdahi, Fadi J. Fernández, Milagros Hermida, Román Bagherzadeh, Nader Singh, Hartej DSP Firmware Group Morpho Technologies Department of Electrical and Computer Engineering University of California Irvine Department of Computer Architecture and Automation Facultad de Informatica Complutense University Department of Computer Architecture and Automation Complutense University Madrid Department of Electrical and Computer Engineering Henry Samueli School of Engineering University of California Irvine IEEE

Dynamically reconfigurable architectures are emerging as a viable design alternative to implement a wide range of computationally intensive applications. At the same time, an urgent necessity has arisen for support tool development to automate the design process and achieve optimal exploitation of the architectural features of the system. Task scheduling and context (configuration) management become very critical issues in achieving the high performance that digital signal processing (DSP) and multimedia applications demand. This article proposes a strategy to automate the design process which considers all possible optimizations that can be carried out at compilation time, regarding context and data transfers. This strategy is general in nature and could be applied to different reconfigurable systems. We also discuss the key aspects of the scheduling problem in a reconfigurable architecture such as MorphoSys. In particular, we focus on a task scheduling methodology for DSP and multimedia applications, as well as the context management and scheduling optimizations.

关键词： Computation theory

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PID-parameter auto-tuner based on embedded MCU

PID-parameter auto-tuner based on embedded MCU

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World Congress on Intelligent Control and automation (WCICA)

作者： Chen Jie Sun Demin Xue Meisheng Department of Computer & Information Engineering Anhui of Architecture and Industry Hefei China Department of Automation University of Science and Technology Hefei China

This paper describes an algorithm of PID-parameter tuning with correlation-coefficient identification, which is applied in the auto-tuner of PID-parameters based on an embedded MCU. We have optimized the algorithm acc... 详细信息

关键词： automation Sun Electronic mail Embedded computing computer architecture computer industry Microcontrollers

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Evaluating register allocation and instruction scheduling techniques in out-of-order issue processors

Evaluating register allocation and instruction scheduling te...

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International Conference on Parallel architecture and Compilation Techniques (PACT)

作者： M.G. Valluri R. Govindarajan Laboratory for Computer Architecture ECE Department University of Technology Austin TX USA Supercomputer Education and Research Centre Department of Computer Science and Automation Indian Institute of Science Bangalore India

The phase ordering of register allocation and instruction scheduling in a compiler and their integration have been well studied for in-order issue and VLIW processors. In this paper we study this problem in the context of out-of-order issue processors. Such a study is interesting as the dynamic instruction ordering and register renaming support mechanisms in out-of-order issue processors are similar in spirit to what the complex register allocation and instruction scheduling techniques do at compile-time. We evaluated four existing techniques, namely postpass scheduling, prepass scheduling, parallel interference graph, and integrated prepass scheduling methods. Our initial experimental results reveal that for o-o-o issue processors the focus should be on reducing the register pressure/spill code than exposing the parallelism at compiling time.

关键词： Out of order Registers Processor scheduling VLIW Laboratories computer architecture Supercomputers computer science education computer science automation

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The Colarado Multistatic FMCW Radar System

The Colarado Multistatic FMCW Radar System

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European Conference on Microwave

作者： P.J.F. Swart J. Schier A.J.C. van Gemund W.F. van der Zwan J.P. Karelse G.L. Reijns P. van Genderen L.P. Ligthart H.T. Steenstra Department of Information Technology and Systems International Research Centre for Telecommunications-Transmission and Radar Delft Netherlands Academy of Sciences of the Czech Republic Inst. of Information Theory and Automation Delft University of Technology Dept. of Information Technology and Systems Mekelweg 4 2628 CD Delft The Netherlands Tel.: +31 15 278 1023 Fax: +31 15 278 4046. E-mail: schier@utia.cas.cz Computer Architecture and Digital Techniques (CARDIT) Delft University of Technology Dept. of Information Technology and Systems Mekelweg 4 2628 CD Delft The Netherlands Tel.: +31 15 278 1023 Fax: +31 15 278 4046. E-mail: a.vgemund@et.tudelft.nl Department of Information Technology and Systems Computer Architecture and Digital Techniques (CARDIT) Delft University슠of슠Technology Delft Netherlands

A multstatic frequency-modulated continuous wave (FMCW) radar system is under development for use in the control system of autonomous vehicles. The aim of the system, named Colarado, is the 3D location of obstacles in the surrounding environment. In this paper a laboratory prototype system version, the demonstrator, is described and current results are presented.

关键词： Receiving antennas Transmitting antennas Radar signal processing Radar antennas Voltage-controlled oscillators Spatial resolution Radar theory Vehicles Containers Layout

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Using simulation with hardware verification for teaching computer architecture

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computer Applications in Engineering Education 1995年第3期3卷 173-173页

作者： Segee, B. Field, J. Littlefield, B. Department of Electrical and Computer Engineering University of Maine Orono Maine 04469—5708 Bruce E. Segee:is an Assistant Professor of Electrical and Computer Engineering at the University of Maine. He received BSEE (1985) and MSEE (1989) degrees from the University of Maine and a PhD from the University of New Hampshire (1992). He is a member of IEEE Eta Kappa Nu Tau Beta Pi and Sigma Xi. Dr. Segee's technical interests are in the areas of computer architecture neural networks instrumentation and industrial automation. He is the co-author of a John Wiley textMicroprogramming and Computer Architecture. John C. Field:is Professor and Chairperson of the Electrical and Computer Engineering Department at the University of Maine. He received the BSEE (1963) MSEE (1965) and PhD (1969) degrees all from Northeastern University. He is a member of IEEE Eta Kappa Nu Tau Beta Pi Sigma Xi and Phi Kappa Phi. Dr. Field's technical interests are in the areas of computers and microprocessor applications. He is the co-author of a John Wiley textMicroprogramming and Computer Architecture.

Material for a computer architecture class based on four progressively more complex microprogrammed circuits is described. The circuits and their associated microassemblers and simulators are discussed. Interestingly, the simulators allow students to understand the workings of the hardware more fully than is possible using the hardware alone.

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Reliable client-server communication in distributed programs

Reliable client-server communication in distributed programs

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Conference on Local computer Networks (LCN)

作者： K. Ravindran S.T. Chanson K.K. Ramakrishnan Department Of Computer Science & Automation Indian Institute of Science Bangalore India Department of Computing & Information Sciences Kansas State University Manhattan KS USA Department of Computer Science University of British Columbia Vancouver BC Canada Distributed Systems Architecture & Performance Digital Equipment Corporation Littleton MA USA

The authors' premise is that applications have the ability to tolerate certain types of failures under certain situations. This may, in turn, relax the top-level constraint on failure recovery algorithms in the interprocess communication (IPC) layer and allow exploitation of the inherent tolerance of applications to failures in a systematic way to simplify failure recovery. Using this application-driven approach, the authors present a model of a distributed program based on the well-known client-server relationship among the processes of the program. The model reflects certain generic properties of the application layer that can be exploited by the IPC layer during failure recovery. New techniques as to how the properties can be used for recovery are outlined. The authors use remote procedure call and shared variable as communication abstractions for the client and the server processes in the program to communicate with one another. The simplicity and generality of the failure recovery renders the application-driven approach particularly useful in contemporary distributed systems which are large and heterogeneous and hence have complex failure modes.< >

关键词： Local area networks automation computer networks Distributed computing Microcomputers LAN interconnection Application software Network interfaces File systems Veins

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