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2002年IEEE十区计算机、通信、控制和电机工程会议

作者： Liang-Teh Lee Der-Fu Tao Chia-Ying Tseng Ming-Tsung Wu Department of Computer Science and Engineering Tatung University Department of Electronical Engineering Kuang Wu Institute of Technology 40 Chung-Shan North Road 3rd Sec.Taipei 104 Taiwan China Department of Computer Science and Engineering Tatung University Department of Computer Science and Engineering Tatung University

In distributed computing systems, load balancing is one of the mostimportant factors that affect the system performance. This paper presentsa sender-mitiated dynamic load balancing policies in a distributedcomputing system. There are four policies consisted in the proposedExtenics-based Load Balancing Mechanism (ELBM). For the transferpolicy, instead of defining a fixed threshold value in the traditional loadbalancing policies, we are applying the extension set theory and usingthe average response time of jobs as a factor to create an adaptivethreshold value which is calculated by relational function of averageresponse time, for determining that a new arriving job should bemigrated or not In addition to the transfer policy, bypass-transfer methodis used in the location *** that need to be migrated do not needto be transferred to central node first, but are transferred to destinationnode directly, so as to reduce the communication costs. In order to makethe system more reliable, a template queue is added at the master node ofthe system to reduce the job arrival failure. A simulation model has beenbuilt for evaluating the performance of the system. Comparing with otherload balancing mechanisms, such as RT and ALBCII algorithms, thesimulation results show that a better performance can be achieved by theproposed mechanism.

关键词： distributed computing system extenics-based load balancing mechanism extension theory response time bypass-transfer

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Characterization of micromachined acoustic ejector and its applications

Characterization of micromachined acoustic ejector and its a...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： T.-K.A. Chou K. Najafi M.O. Muller L.P. Bernal P.D. Washabaugh Center for Wirless Integrated MicroSystems Electronical Engineering and Computer Science Department University of Michigan Ann Arbor MI USA Aeorspace Engineering Department University of Michigan Ann Arbor MI USA

ISBN: (纸本)0780371852

This paper presents the performance characterization and optimization of micromachined acoustic ejectors (MACE) and their application in micro propulsion and gas pumping. The MACE array utilizes forced Helmholtz resonators coupled with an acoustic ejector to produce high-speed micro-jets at resonance. A micro-jet with "near-field" velocity of /spl sim/0.8 m/sec is measured by hot-wire anemometry. An average thrust of 1.35/spl mu/N per ejector has been obtained consistent with the prediction by theory. A visualized air column longer than 10cm is also demonstrated with an equivalent pumping rate of 54 ml/min per ejector (/spl sim/1600/spl mu/m/spl times/1600/spl mu/m). The resonators have been consistently operating for more than 6,000,000,000 cycles without failure.

关键词： Acoustic applications Damping Electrodes Propulsion Acoustic devices Resonance Springs Application software Acoustic arrays Acoustical engineering

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A secure checkpointing system

A secure checkpointing system

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Pacific Rim International Symposium on Dependable Computing

作者： Hyo-chang Nam Jong Kim Sung Je Hong Sunggu Lee Department of Computer Science and Engineering Pohang University of Science and Technology Pohang South Korea Department of Electronical Engineering Pohang University of Science and Technology Pohang South Korea

ISBN: (纸本)0769514146

Fault-tolerant computer systems are being used increasingly in such applications as e-commerce, banking, and stock trading, where privacy and integrity of data are as important as the uninterrupted operation of the service provided. While much attention has been paid to the protection of data explicitly communicated over the Internet, there are also other sources of information leakage that must be addressed. This paper addresses one such source of information leakage caused by checkpointing, which is a common method used to provide continued operation in the presence of faults. Checkpointing requires communication of memory state information, which may contain sensitive data, over the network to a reliable backing store. Although the method of encrypting all of this memory state information can protect the data, such a simplistic method is an overkill that can result in a significant slowdown of the target application. This paper examines ways to combine the operations required to perform incremental checkpointing with those required to encrypt this memory state data. Analysis and experimentation on an actual system are used to show that the proposed secure checkpointing schemes are feasible and require a relatively low level of overhead.

关键词： Checkpointing Protection Information resources Cryptography Fault tolerant systems Application software Banking Data privacy Internet Telecommunication network reliability

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The development of an accurate dem extraction strategy for satellite image pairs using epipolarity of linear pushbroom sensors and intelligent interpolation scheme 19

The development of an accurate dem extraction strategy for s...

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19th International Congress for Photogrammetry and Remote Sensing, ISPRS 2000

作者： Lee, Hae-Yeoun Park, Wonkyu Kim, Taejung Kim, Seungbum Lee, Heung Kyu Kim, Tag-Gon Department of Computer Science Korea Advanced Institute of Science and Technology Korea Republic of Satellite Technology Research Center Korea Advanced Institute of Science and Technology Korea Republic of Department of Electrical and Electronical Engineering Korea Advanced Institute of Science and Technology Korea Republic of

This paper describes a strategy to extract accurate Digital Elevation Models (DEMs) from satellite image pairs. In general, extracting DEMs consists of camera modeling, stereo matching, editing and interpolation. Because of the unique geometry and radiometric characteristics of satellite image pairs, methods developed for aerial or perspective image pairs cannot be applied. The proposed strategy employs a stereo matching algorithm taking the epipolarity of linear pushbroom sensors and scene geometry into account and an optimal interpolation scheme for satellite images. Using 100m-resolution Digital Terrain Elevation Data (DTED) by NIMA, USA and 60m-resolution DEM generated from digitized contours produced by National Geography Institute, Korea, we assess the performance of our strategy in comparison with other commercial software packages on two 60km×60km SPOT panchromatic stereo image pairs. Based on results, DEMs from our strategy have 25.5m RMS (Root Mean Squares) errors for Boryung area, Korea, and 33.6m for Seoul area, Korea, while DEMs from PCI have 44.7m and 61.1m, respectively and DEMs from Intergraph have 50.8m for Boryung area. © 2000 International Society for Photogrammetry and Remote Sensing. All rights reserved.

关键词： Interpolation

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Efficient Motion Estimation Algorithm Based on Structure Segmentation and Homogeneity Test

Efficient Motion Estimation Algorithm Based on Structure Seg...

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1996 3rd International Conference on Signal Processing(ICSP’96)

作者： Jianping Fan Liming Zhang Ting Zhou Dingjia Xin Fuxi Gan Shanghai Institute of Optics and Fine Mechanics Academia Sinica Department of Electronical Engineering Fudan University Department of Computer Science Fudan University

This paper reports our study of a novel motion estimation technique based on structure segmentation and homogeneity *** this proposed method,the frames are first segmented into four macroblock types corresponding to stationary background,uncovered background(or new objects),moving objects and edges among *** the following motion estimation is only performed on the compensable macroblocks according to motion homogeneous

关键词： image Efficient Motion Estimation Algorithm Based on Structure Segmentation and Homogeneity Test frame

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New hyper-distributed hyper-parallel AI approach based on chaotic bifurcations and synchronizations

New hyper-distributed hyper-parallel AI approach based on ch...

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International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： Dianxun Shuai Y. Watanabe Department of Computer Science and Technology Xi''an University of Electronical Science and Technology Xi'an Shaanxi China Department of Knowledge Engineering and Computer Science Faculty of Engineering Doshisha University Kyoto Japan

For problem solving in the artificial intelligence, this paper presents a new hyper-distributed hyper-parallel approach based on the bifurcations and synchronizations of the hierarchical distributed chaotic dynamic systems. By using Chua's circuits arrays, the realization of the hyper-distributed hyper-parallel heuristic algorithms for real-time search of any implicit AND/OR graph is discussed. The approach not only combines the advantages of both the traditional sequential symbolic logic and the conventional neural network approaches, but also overcomes their drawbacks in many respects.< >

关键词： Artificial intelligence Chaos Bifurcation Neural networks Knowledge engineering computer science Problem-solving Circuits Heuristic algorithms Logic

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IBO:AN ISSUE BASED OBJECT MODEL FOR SOFTWARE DESIGN

IBO:AN ISSUE BASED OBJECT MODEL FOR SOFTWARE DESIGN

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计算机，通信，控制与电力工程国际会议

作者： Shih-Hao Lee Baw-Jhiune Liu Graduate Institute of Computer Science and Electronical Engineering National Central University

ISBN: (纸本)0780312333

This paper describes an approach for structuring ideas during software *** design an ad hoc conversational model, which based on Issue-Based Information System(IBIS) model,to capture the ideas in the phases of object-oriented analysis and object-oriented design(OOA/OOD).Issue based system has been developed for collaborating on complex design problems,and object oriented approach is considered as the new methodology for fighting against the challenges of developing complex software *** propose a new approach that is combining IBIS model and object-oriented method for idea processing in computer-aided software design.

关键词： IBO:AN ISSUE BASED OBJECT MODEL FOR SOFTWARE DESIGN

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GEOMETRIC APPROACH IN SOLVING INVERSE KINEMATICS OF PUMA ROBOTS

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IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS 1984年第6期20卷 695-706页

作者： LEE, CSG ZIEGLER, M Department of Electronical Engineering and Computer Science University of Michigan Ann Arbor MI USA

A geometric approach for deriving a consistent joint solution of a six-point PUMA1 robot is presented. The approach calls for the definition of various possible arm configurations based on the link coordinate systems and human arm geometry. These arm configurations are then expressed in an exact mathematical way to allow the construction of arm configuration indicators and their corresponding decision equations. The arm configuration indicators are prespecified by a user for finding the joint solution. These indicators enable one to find a solution from the possible four solutions for the first three joints, a solution from the possible two solutions for the last three joints. The solution is calculated in two stages. First a position vector pointing from the shoulder to the wrist is derived. This is used to derive the solution of the first three joints by looking at the projection of the position vector onto the xi-1-yi-1(i = 1,2,3) plane. The last three joints are solved using the calculated joint solution from the first three joints, the orientation matrices, and the projection of the link coordinate frames onto the xi-1-yi-1 (i = 4,5,6) plane. From the geometry, one can easily find the arm solution consistently. A computer simulation study conducted on a VAX-11/780 computer demonstrated the validity of the arm solution.

关键词： Robot kinematics End effectors Robotic assembly Computational geometry Manipulators Humans Servomechanisms Control systems Equations Shoulder

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Secure Data Management 1

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丛书名： Lecture Notes in computer science

1000年

作者： Willem Jonker Milan Petković

ISBN: (数字)9783642328732

ISBN: (纸本)9783642328725

This book constitutes the refereed proceedings of the 9th VLDB Workshop on Secure Data Management held in Istanbul, Turkey, in August 27, 2012.;The 12 revised full papers presented were carefully reviewed and selected from 22 submissions. The papers are organized in topical sections on privacy protection, access control, secure storage on the cloud, and trust on the Web.

关键词： Systems and Data Security Database Management Information Storage and Retrieval Information Systems Applications (incl. Internet) Cryptology computer Communication Networks

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