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How can network coding help P2P content distribution?

How can network coding help P2P content distribution?

引用

2009 IEEE International Conference on Communications, ICC 2009

作者： Ma, Guanjun Xu, Yinlong Kaiqian, Ou Wen, Luo Department of Computer Science and Technology University of Science and Technology of China Key Laboratory on High Performance Computing Anhui Province China

ISBN: (纸本)9781424434350

It is well known that network coding can enhance the performance of Peer-to-Peer (P2P) content distribution systems since it benefits block scheduling. In this paper, we introduce our P2P content distribution system "SmartCode" with sparse network coding on PlanetLab. SmartCode uses pre-checking to avoid linearly dependent blocks being transmitted. Under the same system architecture, we also implement two systems "Ecode" and "LRF". Ecode is also based on sparse network coding, but without pre-checking. LRF is BitTorrent-like, using local-rarest-first for block scheduling. We conduct extensive experiments to compare the performances among the three systems. Experimental results show that the distributing time of SmartCode is reduced by 11% on average and up to 19% compared with LRF, and by 7% on average and up to 16% compared with Ecode. We also conduct experiments to analyze robustness among the three systems under the assumption that peers join in and leave a content distribution session dynamically and the seed leave the session after it has transmitted a fixed percentage of blocks over the total blocks of the content. In dynamical cases, SmartCode outperforms evidently than Ecode and LRF in downloading time and the times of peers completing the downloading. ©2009 IEEE.

关键词： Network coding

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Efficient group signature with forward secure revocation

Efficient group signature with forward secure revocation

引用

作者： Jin, Haimin Wong, Duncan S. Xu, Yinlong School of Computer Science University of Science and Technology of China Hefei China Key Laboratory on High Performance Computing Hefei Anhui Province China Department of Computer Science City University of Hong Kong Hong Kong

ISBN: (纸本)9783642108464

Forward secure revocation for group signature allows a revoked group member to preserve the anonymity of its signatures generated before the revocation. Most of the existing schemes of this type either have the signing or verifying complexity linear to the group size or the number of revoked members, or require the updates of signing key or public key once revocation occurs. Recently, an outstanding improvement has been made in Nakanishi et al.'s proposal [15]. However, the size of public key in their scheme is linear to the group size. In this paper, we propose a new forward secure revocable group signature scheme satisfying 1) constant signing and verifying complexity, 2) constant size in signature, public key and signing key, 3) no updates of public key or signing key are required when member joining or delete occurs. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： Authentication

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How Can Network Coding Help P2P Content Distribution?

How Can Network Coding Help P2P Content Distribution?

引用

IEEE International Conference on Communications (ICC)

作者： G. Ma Y. Xu K. Ou W. Luo Department of Computer Science and Technology The Key Laboratory on High Performance Computing University of Science and Technology Anhui China

It is well known that network coding can enhance the performance of peer-to-peer (P2P) content distribution systems since it benefits block scheduling. In this paper, we introduce our P2P content distribution system "SmartCode" with sparse network coding on PlanetLab. SmartCode uses pre-checking to avoid linearly dependent blocks being transmitted. Under the same system architecture, we also implement two systems "Ecode" and "LRF". Ecode is also based on sparse network coding, but without pre-checking. LRF is BitTorrent- like, using local-rarest-first for block scheduling. We conduct extensive experiments to compare the performances among the three systems. Experimental results show that the distributing time of SmartCode is reduced by 11% on average and up to 19% compared with LRF, and by 7% on average and up to 16% compared with Ecode. We also conduct experiments to analyze robustness among the three systems under the assumption that peers join in and leave a content distribution session dynamically and the seed leave the session after it has transmitted a fixed percentage of blocks over the total blocks of the content. In dynamical cases, SmartCode outperforms evidently than Ecode and LRF in downloading time and the times of peers completing the downloading.

关键词： Network coding Peer to peer computing Communications Society Computer science high performance computing Processor scheduling Robustness Relays Throughput Internet

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The Design of University Students' Innovative Undertaking Practical Website Platform

The Design of University Students' Innovative Undertaking Pr...

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

作者： Delin Sun Provincial Key Laboratory of High Performance Computing Jiangxi Normal University Nanchang China

With the employment pressure becoming bigger and bigger, the university students' innovative undertaking has obviously become the tendency that comply with the time, so providing a platform of undertaking experiment, training, practice appears especially important. This Web site provides a complete and omni-directional platform for the university student. This platform's undertaking experiment, training and practice can raise and promote the students' initiative capacity, and can provide opportunities for them to start his business or to cooperate with the enterprise. This platform's target client also includes teachers who are engaged in the undertaking education. It provides a brooader drill ground for the teachers. This kind of undertaking experiment, training, practice platform, which gather student, teacher, enterprise, university and the government together, is a new kind of undertaking teaching method which provides ¿new knowledge, new technology¿. Its studying prospect in theory and practice is broad.

关键词： Web page design Employment Government Education Unemployment Knowledge acquisition Speech Educational institutions Information resources Resource management

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Discovery of Motif Pairs from Protein-Protein Interaction Networks

Discovery of Motif Pairs from Protein-Protein Interaction Ne...

引用

International Joint Conference on Bioinformatics, Systems Biology and Intelligent computing, IJCBS

作者： Hong Zhang Yun Xu Yuzhong Zhao Department of Computer Science Anhui Province-MOST Co-Key Laboratory of High Performance Computing and Its Application University of Science and Technology Hefei Anhui China

Motif pairs can provide insight on how protein-protein interactions are encoded. Their discovery requires laborious and expensive biological experiments. Recently, Tan et al. proposed a computational approach to find motif pairs in the sequences of interacting proteins. However, their approach suffers from two drawbacks. The heuristic used in their approach is not accurate and may lead to a result including some false positive motif instances. Their approach is also not scalable. It may take days to process a set of 5000 protein sequences with about 20,000 interactions. We present in this work a new algorithm DMPCP, which finds motifs from a subset of proteins and then pairs them up according to Chi-squared scoring functions. Experiments on real biological datasets and simulated datasets show that our approach is efficient and can find actual motif pairs. We also evaluated our approach on simulated datasets with planted motif pairs. The results show that our approach can achieve high success rates when interaction data is insufficient.

关键词： Protein engineering Sequences Biology computing Computer networks high performance computing Biological information theory Biological system modeling Bioinformatics Systems biology Intelligent systems

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Formal Derivation of a Generic Algorithmic Program for Solving a Class of Extremum Problems

Formal Derivation of a Generic Algorithmic Program for Solvi...

引用

ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed computing (SNPD)

作者： Chang-Jing Wang Jin-Yun Xue Jiangxi Normal University Nanchang Jiangxi CN Key Laboratory of High-Performance Computing Technology Jiangxi Normal University Nanchang China Institute of Software Chinese Academy and Sciences Beijing China

In this paper, we derive formally, using PAR method, a generic algorithmic program for solving a class of extremum problems which can be abstract into a algebra structure called semiring. Some typical algorithms, such as minimal sum problem, maximal product problem, longest ascending segment problem, etc, are all instances of the generic algorithmic program. We put emphasis on the algorithmic derivation rather than the algorithmic verification. Not only embody the designer insight but also reveal the main ideas and ingenuity of these algorithms. The example in this paper confirms that PAR method is a simple and practical approach in deriving high-trustworthy generic algorithm programs.

关键词： Algorithm design and analysis Software algorithms Algebra Software engineering Artificial intelligence Intelligent networks Intelligent structures Distributed computing Laboratories Computers

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A faster parallel algorithm and efficient multithreaded implementations for evaluating betweenness centrality on massive datasets

A faster parallel algorithm and efficient multithreaded impl...

引用

International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Kamesh Madduri David Ediger Karl Jiang David A. Bader Daniel Chavarria-Miranda Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA USA College of Computing Georgia Institute of Technology Atlanta GA USA High Performance Computing Pacific Northwest National Laboratory Richland WA USA

We present a new lock-free parallel algorithm for computing betweenness centrality of massive complex networks that achieves better spatial locality compared with previous approaches. Betweenness centrality is a key kernel in analyzing the importance of vertices (or edges) in applications ranging from social networks, to power grids, to the influence of jazz musicians, and is also incorporated into the DARPA HPCS SSCA#2, a benchmark extensively used to evaluate the performance of emerging high-performance computing architectures for graph analytics. We design an optimized implementation of betweenness centrality for the massively multithreaded Cray XMT system with the Thread-storm processor. For a small-world network of 268 million vertices and 2.147 billion edges, the 16-processor XMT system achieves a TEPS rate (an algorithmic performance count for the number of edges traversed per second) of 160 million per second, which corresponds to more than a 2times performance improvement over the previous parallel implementation. We demonstrate the applicability of our implementation to analyze massive real-world datasets by computing approximate betweenness centrality for the large IMDb movie-actor network.

关键词： Parallel algorithms Computer networks performance analysis Concurrent computing Complex networks Kernel Social network services Power grids Grid computing high performance computing

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The Research for College Electronic Commerce Specialized Knowledge System, Innovative Experimental Plot in Jiangxi Province of China

The Research for College Electronic Commerce Specialized Kno...

引用

International Forum on Computer Science-technology and Applications (IFCSTA)

作者： Delin Sun Chuansun Wu Kewei Jiang Jian Zhang Jinyun Xue Xin Tan Peipei Liu Yaowen Cheng Jiangxi Normal University Nanchang Jiangxi CN Jiangxi Normal University Nanchang China Provincial Key Laboratory For High-Performance Computing Jiangxi Normal University Nanchang China

This article conducted the exploring research about ¿ordinary college electronic commerce specialized knowledge system, innovative experimental plot in Jiangxi Province¿. It is the important content of Chinese University e-commerce specialized standard, it is the evaluation criterion of formulating the e-commerce specialized teaching plan and constructing the core curriculum system, and is also the basis of e-commerce specialized appraisal and authentication. Ordinary college e-commerce specialized knowledge system in Jiangxi Province innovative experiment plot is a systematic project, its implementation will have a positive role in the development of China's college e-commerce specialized and the specialized construction.

关键词： Educational institutions Electronic commerce Knowledge based systems Computer science education Appraisal Project management Computer applications Application software Modular construction Authentication

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The Investigation of the Innovational Experiment Area for the Teaching Quality Project of Electronic Commerce Subject at the Background of Teaching Informationization

The Investigation of the Innovational Experiment Area for th...

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

作者： Delin Sun Juying Yao Jinyun Xue Xin Tan Peipei Liu Xiaosheng Fang Jinhu Wang Jiangxi Provincial Key Laboratory of High-Performance Computing Jiangxi Normal University Nanchang China JiangXi Institute of Education Nanchang China School of Business Jiangxi Normal University Nanchang China

This thesis discusses and probes the innovational experiment area of the knowledge of the electronic commerce subject in the college or university in Jiangxi Province from the view of teaching informationization (http://***). Its aim is to expedite the construction of the teaching quality and the teaching innovation project of electronic commerce subject. This article, first of all, discusses the structure designs of the knowledge of the electronic commerce subject in the college or university of the innovational experiment area in Jiangxi Province; secondly, it studies the construction problem of the teaching informationization of the electronic commerce subject; lastly, it probe the knowledge system of the electronic commerce subject, the teaching platform of the teaching informationization and tridimensionalization in practice, and the teaching informationization of the electronic commerce subject. The significance of this article is to offer the new train of thoughts for constructing the knowledge system of innovational experiment area as the provincial standard level in college or university.

关键词： Education Electronic commerce Technological innovation Educational institutions Knowledge based systems Educational products Probes Educational technology Production Knowledge acquisition

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Construction and Management of Electronic Commerce Knowledge System Innovation Experimental Plot Project

Construction and Management of Electronic Commerce Knowledge...

引用

IEEE International Symposium on Computer Network and Multimedia technology, CNMT

作者： Delin Sun Wen Shi Xin Tan Jinyun Xue Peipei Liu Lianxing Zhang Yaowen Cheng Jiangxi Normal University Nanchang China Information Engineering School University of Nanchang Nanchang China Jiangxi Provincial Key Laboratory For High-Performance Computing Jiangxi Normal University Nanchang China

This article took the Chinese first college e-commerce specialized knowledge system provincial innovation experimental plot project (Jiangxi Province innovation experimental plot project) as an example, carried on the design for the project of e-commerce specialized knowledge system, e-commerce characteristic specialized, e-commerce personnel cultivation pattern, e-commerce scientific research team. These projects' design is innovative to the e-commerce specialized knowledge system in Chinese College's experimental site. This project has been authorized by the Chinese Ministry of Education college e-commerce specialized teaching direction committee, this is China's first college e-commerce specialized knowledge system innovation experiment plot project, and Jiangxi Province is also China's first experimental province authorized by Ministry of Education college e-commerce specialized teaching direction committee. The research and construction of e-commerce knowledge system's innovation experimental project in Jiangxi Province will provide the experimental and demonstration experience to Chinese e-commerce special zed's development.

关键词： Innovation management Knowledge management Project management Electronic commerce Knowledge based systems Technological innovation Educational institutions Computer science education Engineering management Design engineering

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