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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Junfeng Wang Hongxia Zhou Fanjiang Xu Mingtian Zhou College of Computer Science and Engineering University of Electronic Science and Technology ChengDu China National Key Laboratory of Integrated Information System Technology Institute of Software Chinese Academy and Sciences Beijing China Chongqing Communication College Chongqing China

Low Earth orbit (LEO) satellite networks are capable of providing wireless connectivity seamlessly and continuously to any part of the world with guaranteed short round-trip propagation delay. As a key part of next generation network (NGN) infrastructure, next generation satellite networks are expected to support a variety of applications with diverse performance requirements. This paper argues that the constellation tomography for the LEO satellite network is a preliminary step for efficient satellite network monitoring and performance promotion. To measure the constellation, a divide-and-conquer mechanism is developed for each parameter estimation by delay probing. The delay measurement is only carried out between two terminals located at the same geographic positions. Performance evaluation on several popular polar LEO constellations proves the accuracy and efficiency of the developed constellation tomography algorithms in divide-and-conquer manner. The geographic position limitation of the delay probing terminals for valid constellation inference is also analyzed in the paper

关键词： Low earth orbit satellites Satellite constellations Extraterrestrial measurements Next generation networking Tomography Propagation delay Monitoring Parameter estimation Delay estimation Position measurement

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Theory and Network Applications of Dynamic Bloom Filters

Theory and Network Applications of Dynamic Bloom Filters

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： D. Guo J. Wu H. Chen X. Luo Key laboratory of C4ISR Technology School of Information System and Management National University of Defense Technology Changsha Hunan China Department of Computer Science and Engineering Florida Atlantic University Boca Raton FL USA

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A Digital Right Management Model for Distribution of Digital Audiovisual Content

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1877-1881页

作者： FAN Kefeng PEI Qingqi WANG Meihua MO Wei CAO Ling Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi＇an 710071 Shaanxi China Electronic Equipment and System Research Center China Electronics Standardization Institute Beijing 100007 China TRS Open Laboratory Beijing Information Technology Institute Beijing 100101 China

This paper presents a digital rights management model, which considers the integrated factors including legality, communication security, integrity of the content, and trading fairness. The architecture of the model, the necessary protocol for the copyright control and content distribution, the authentication mechanism which offer consumption registration for content fair distribution, of the model are all provided. The scheme also provides distribution and evidence for using the copyright of digital content fairly and effectively. Finally, analysis shows the proposed model has both high security and good performance.

关键词： digital rights management content distribution authentication mechanism model

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FDEWS 2.0: A Web-GIS-Based Early Warning system for Fish Disease via Water Quality Management

FDEWS 2.0: A Web-GIS-Based Early Warning System for Fish Dis...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Nan Li Zetian Fu Boqi Wang Xiaoshuan Zhang College of Engineering China Agricultural University Beijing China College of Resources and Environment China Agricultural University Beijing China Key Laboratory for Modern Precision Agriculture System Integration China Agricultural University Beijing China Key Laboratory for computer information management technology Suzhou University Jiangsu China

The water quality is the most vital factor in a successfully healthy aquaculture. After investigation by 415 fish disease cases and experiments, it is found that eutrophication and the pollutants of NH3, H2S as well as heavy metals and organic compounds are the main reasons of inducing fish disease in the north of China. Generally speaking, an early warning system for fish disease based on water management is a cheaper and alternative choice available for the fish farmers to warn the risks and to minimize disease problems. A Web-GIS-based fish disease early-warning system (FDEWS 2.0) based on water quality management has been developed by us. Building a water quality monitoring network in the aquafarm and integrating a series of simulation models with the GIS and the World-Wide-Web (WWW) are the key advantages of this system

关键词： Alarm systems Marine animals Diseases Quality management Water pollution Aquaculture Organic compounds Risk management Monitoring Geographic Information systems

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A method to integrate, assess and characterize the protein-protein interactions

A method to integrate, assess and characterize the protein-p...

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IEEE Symposium on Computational Intelligence and Bioinformatics and Computational Biology (CIBCB)

作者： Fa Zhang Lin Xu Jingchun Chen Zhiyong Liu Bo Yuan Key Laboratory of Computer System and architecture the Institute of Computing Technology Chinese Academy and Sciences China Graduate School Chinese Academy and Sciences China Department of Biomedical Informatics Ohio State Uinversity USA National Natural Science Foundation China

Recently, large-scale protein-protein interactions were recovered using the similar two-hybrid system for the model systems. This information allows us to investigate the protein interaction network from a systematic point of view. However, experimentally determined interactions are susceptible to errors. A previous assessment estimated that only ~10% of the interactions can be supported by more than one independent experiment, and about half of the interactions may be false positives. These false positives might unnecessarily link unrelated proteins, resulting in huge apparent interaction clusters, which complicate elucidation for the biological importance of these interactions. Address this problem, we present an approach to integrate, assess and characterize all available protein-protein interactions in model organisms yeast and fly. We first integrate all available protein-protein interaction databases of yeast and fly, and merge all the datasets. We then use machine learning techniques to score the reliability for each interaction, and to rigorously validate the scoring scheme of yeast protein-protein interactions from different aspects. Our results show that this scoring scheme provides a good basis for selecting reliable protein-protein interaction dataset

关键词： Proteins Fungi Databases Electronics packaging Machine learning Genetics Laboratories Biomedical computing computer architecture Biomedical informatics

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Cache based feedback grid scheduling approach

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Ruan Jian Xue Bao/Journal of Software 2006年第11期17卷 2314-2323页

作者： Yuan, Ping-Peng Cao, Wen-Zhi Kuang, Ping Service Computing Technology and System Key Laboratory Wuhan 430074 China Cluster and Grid Computing Key Laboratory of Hubei Province Wuhan 430074 China School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

Grid scheduling which aims at improving resource utilization and grid application performance is a key concern in grid. Currently, much research can be found about grid scheduling and some algorithms on it were proposed. However, since grid resources are autonomic, distributed and their status change over time, those scheduling algorithms did not fit for the cases well. In this paper, a cache based feedback grid scheduling (CBFS) approach is presented to capture the dynamics and impact of simultaneously co-allocated tasks in a grid. In this approach, grid scheduler utilizes recent resource performance data, such as recent task submitting time and execution time of task which are kept in cache and a feedback approach to engineer load balancing across multiple grid resources. After comparing this dynamic grid scheduling approach with previous research, it is found that CBFS is more generous than other scheduling approaches. Experimental results demonstrate that this approach diminishes latency and contributes to the overall grid load balancing, which significantly improves resource utilization and response time of tasks.

关键词： Algorithms

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Generalized particle model for problem-solving in multi-agent systems

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Jisuanji Xuebao/Chinese Journal of computers 2006年第5期29卷 740-750页

作者： Shuai, Dian-Xun Wang, Xing Feng, Xiang Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Intelligence Technology and System Tsinghua University Beijing 100084 China

This paper is devoted to a generalized particle model (GPM) approach to distributed problem-solving in MAS, which transforms the optimization problem of resource assignments and task allocations of MAS in complex environment into the kinematics and dynamics in GPM. The complex environment in MAS that the proposed GPM approach may deal with includes: A variety of interactions randomly and concurrently occurring among agents;different personality and autonomy of distinct agents;different life-cycle period, congestion degree and failure rate for distinct entities in MAS. At first, the relation between the GPM and MAS in the context of distributed problem-solving is expatiated. Then the mathematical-physical formalization for GPM and the parallel algorithm GPMA are presented. The basic properties of the GPMA algorithm, including the feasibility, convergency and stability, are discussed. Through a number of simulation experiments and comparisons related to resource assignments and task allocations in MAS in complex environment, the authors demonstrate many advantages of the proposed GPM approach over other coalition methods for MAS problem-solving in terms of the parallelism and the suitability for complex environment.

关键词： Multi agent systems

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virtual Storage Image Implementation in a SAN system to Improve Storage Capacity, Fault Tolerance and Bandwidth

Virtual Storage Image Implementation in a SAN System to Impr...

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Intermag 2006 (INTERMAG 2006), vol.2

作者： Y. Deng F. Wang K. Zhou S. Wu Center for Grid Computing Cambridge-Cranfield High Performance Computing Facility Cranfield Bedfordshire UK Key Laboratory of Data Storage System Ministry of Education School of Computer Huazhong University of Science and Technology Wuhan China

With a SAN (Storage Area Network), large-capacity storage can be shared among multiple hosts at high speed. The potential market for SAN is enormous, but the technology won't become ubiquitous overnight. The complex administration is indicated by many researches as a key barrier to adopt SAN solutions. This paper designs and implements a virtual storage image (VSI) that aggregates storage space located on heterogeneous storage nodes (see Fig.1)in a Fibre Channel point-to-point (FC-P2P) SAN.

关键词： Image storage Storage area networks Fault tolerant systems Bandwidth File systems Space technology Aggregates Linux Fault tolerance Load management

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PMSH: A new algorithm for raid data migration based on stripe unit heat

PMSH: A new algorithm for raid data migration based on strip...

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International Conference on Machine Learning and Cybernetics, ICMLC 2005

作者： Liu, Yan Xie, Chang-Sheng Li, Huai-Yang Key Laboratory of Data Storage System School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)078039092X

Traditional RAID has the characteristics that location of stripe unit in each disk is stochastic and static, and that the outer zone of the disk has higher data transfer rate as compared to the inner one. Facing this situation, to exploit RAID I/O performance fully, this paper proposes a new algorithm PMSH (Placement and Migration based on Stripe unit Heat) for RAID stripe unit data to be placed optically and migrate dynamically. Based on the heat of RAID stripe unit, PMSH keeps migrating the frequently accessed stripe unit to the disk zone with higher data transfer rate, thus optimize the location of data in RAID disks, and make the data distribution adapt to the evolution of file access pattern dynamically as well. Simulation results demonstrate significant RAID I/O performance improvement using PMSH. © 2005 IEEE.

关键词： Data transfer

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The approximate parameters analysis of mS RAID

The approximate parameters analysis of mS RAID

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International Conference on Machine Learning and Cybernetics, ICMLC 2005

作者： Li, Huai-Yang Xie, Chang-Sheng Liu, Yan Zhao, Zhen Key Laboratory of Data Storage System School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)078039092X

In order to overcome the problem of making choice configuration parameters of RAID, we bring out mS_RAID. A key problem for it is how to choose the optimal stripe unit size. However, till now this issue is not solved, especially under synchronous workload, because of the complexity about read-write of RAID and closed Fork-Join queue network. In this paper, we first present a read-write model of disk array under little and large I/O requests based on closed Fork-Join queue network model and analyze read-write action in RAID, and then deduce a approximately analytical expression to predict disk array's the mean response time under variety workload parameters designed to emulate real-world condition. According to the analytical expression, we can get optimal stripe unit size under minimum mean response time. Finally, a large number of simulations have been carried out to validate our analytical result. © 2005 IEEE.

关键词： Queueing networks

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