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2011 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2011

作者： Yao, Ting Zhang, Min Liu, Yiqun Ma, Shaoping Ru, Liyun State Key Lab. of Intelligent Technology and Systems Tsinghua National Laboratory for Information Science and Technology Dept. of Computer Science and Technology Beijing 100084 China

ISBN: (纸本)9780769545134

User behavior analysis has played an important role in Web information retrieval. Rare queries, whose frequencies are rather low, are usually ignored in existing studies due to the data sparseness. Little has been known about the mass of rare queries on either the information need or the user behavior. In this paper, we make an empirical study of users' behavior on rare queries using a large scale search log. Features concerning query, resource and post-query actions are analyzed, based on which we propose a practical categorization framework and obtain an overview of rare query composition. Further, we study the characteristics of several most commonly occurring types of rare queries, and suggest improving the search performance of them separately. This work gives more insights into understanding the long tail of queries and will be helpful for Web search in terms of rare queries. © 2011 IEEE.

关键词： Behavioral research

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Dynamic threshold-based energy efficient scheduling algorithm for parallel tasks on homogeneous DVS-enabled clusters

Dynamic threshold-based energy efficient scheduling algorith...

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3rd International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC 2011

作者： Liu, Wei Yin, Hang Du, Wei College of Computer Science and Technology Wuhan University of Technology Wuhan 430063 China School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Lab. of Software Engineering Wuhan University Wuhan 430072 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

ISBN: (纸本)9780769545578

For parallel applications running on high-performance clusters, performance is usually satisfied without paying much attention to energy consumption. In this paper, we develop a new scheduling algorithm called Energy efficient Scheduling Algorithm based on DVS and Dynamic threshold (ESADD), which combines dynamic threshold-based task duplication strategy with dynamic voltage scaling (DVS) technique. It first exploits an optimal threshold to get the optimal task grouping and leverage task duplication algorithm to reduce schedule length and communication energy, and then schedules the applications on DVS-enabled processors that can scale down their voltages to reduce computation energy whenever tasks have slack time due to task dependencies. Using simulations we show our algorithm not only maintains good performance, but also has a good improvement on energy efficiency for parallel applications. © 2011 IEEE.

关键词： Energy efficiency

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Energy-aware Task Clustering Scheduling algorithm for heterogeneous clusters

Energy-aware Task Clustering Scheduling algorithm for hetero...

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2011 IEEE/ACM International Conference on Green Computing and Communications, GreenCom 2011

作者： Liu, Wei Li, Hongfeng Du, Wei Shi, Feiyan College of Computer Science and Technology Wuhan University of Technology Wuhan 430063 China School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Lab of Software Engineering Wuhan University Wuhan 430072 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

ISBN: (纸本)9780769544663

High performance heterogeneous clusters have been widely used to commercial and scientific areas. However, huge energy consumption has prevented the further application of large-scale heterogeneous clusters. It is highly desirable to design energy-aware scheduling algorithm for parallel applications running on heterogeneous clusters. In this regard, we propose a novel scheduling algorithm called Efficient-Energy based Task Clustering Scheduling (EETCS for short), which can significantly conserve power by judiciously shrinking communication energy consumption when allocating parallel tasks to heterogeneous computing nodes. We present the preliminary simulation results for Gaussian and FFT parallel applications and simulate heterogeneous clusters environment by simgrid simulator. © 2011 IEEE.

关键词： Scheduling algorithms

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A general sharing model based on proxy re-encryption

A general sharing model based on proxy re-encryption

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7th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2011

作者： Ma, Guojun Pei, Qingqi Wang, Yuchen Jiang, Xiaohong State Key Laboratory of Integrated Services Networks Xidian University Xi'an China School of Electronic Engineering University of Electronic Science and Technology of China Chengdu China Key Lab. of Computer Networks and Information Security Ministry of Education Xidian University Xi'an China

ISBN: (纸本)9780769545172

Content sharing is one of the most significant issues of Digital Rights Management (abbr. DRM). Various schemes for content sharing have been presented in the past years. However, the main goals of these schemes are to solve portability problems instead of rational sharing between different users who are not family members. In this work, we propose an initial step toward this rational sharing and present a general sharing model based on proxy re-encryption. Our model can support the flexible sharing mechanism, with which the user can choose any of the purchased content to share with any legal device, and the content provider can know and limit the number of sharing devices to achieve some novel DRM policies such as pay-per-sharing. To our best knowledge, our sharing model is the first model for content sharing between different users' devices who are not family members using proxy re-encryption. With rational applications, our model can benefit for both the user and content provider to achieve win-win development. © 2011 IEEE.

关键词： Cryptography

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Development of remote controlled lab scale bioreactor using virtual instrument technology

Development of remote controlled lab scale bioreactor using ...

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2011 IEEE International Symposium on IT in Medicine and Education, ITME 2011

作者： Gao, Ling Ren, Yilin Lin, Jianqiang Institute of Information Science and Engineering ShanDong Normal University Shandong Provincial Key Laboratory for Distributed Computer Software Novel Technology Jinan 250014 China School of Life Science Shandong Normal University Jinan 250014 China State Key Lab of Microbial Technology Shandong University Jinan 250014 China

By using virtual instrument technology, a direct digital control bioreactor is developed, which is able to be remote controlled through internet. Mathematical model of the bioreaction system is developed, which is use... 详细信息

ISBN: (纸本)9781612847023

关键词： Bioreactors

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Color-mood-aware clothing re-texturing

Color-mood-aware clothing re-texturing

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12th International Conference on computer-Aided Design and computer Graphics, CAD/Graphics 2011

作者： Shen, Jianbing Sun, Hanqiu Mao, Xiaoyang Guo, Yanwen Jin, Xiaogang Beijing Laboratory of Intelligent Information Technology School of Computer Science Beijing Institute of Technology Beijing 100081 China Department of Computer Science and Engineering Chinese University of Hong Kong Hong Kong Hong Kong University of Yamanashi Japan National Key Lab. for Novel Software Technology Nanjing University China State Key Lab. of CAD and CG Zhejiang University Hangzhou 310027 China

ISBN: (纸本)9780769544977

In this paper, we present a novel color-mood-aware technique to re-texture clothing in a photograph. An efficient classification algorithm is developed to classify clothing textures using color mood scheme. To re-texture the clothing, our approach first computes the gradient maps for the cloth region to be replaced and then calculates the texture distortion coordinates on the projected cloth region according to the gradient maps. After the user selects a target clothing texture from the classified clothing texture database, the lighting and shading effects on the original photograph is transferred using the HSV color space. Experimental results show that the proposed approach successfully re-textures the clothes in photographs while preserving the geometry and lighting features. © 2011 IEEE.

关键词： Color

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A QoS-assured trust-driven semantic web service discovery method

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Journal of Convergence Information Technology 2011年第7期6卷 162-171页

作者： Cao, Bu-Qing Liu, Jian-Xun Li, Bing Key Lab of Knowledge Processing and Networked Manufacturing and School of Computer Science and Engineering Hunan University of Science and technology Xiangtan 411201 China State Key Laboratory of Software Engineering and School of Computer Wuhan University Wuhan Hubei 430072 China

It have become very difficult that users can find the best, credible web service for some proposed semantic web service discovery methods, because web service environment has become open, autonomic, dynamic, and deceptive. This paper proposes a QoS-assured trust-driven semantic web service discovery method i.e. TDSWSD. This method, firstly, describes and labels web services by ontology technology, and then makes use of the existing keyword matching method to carry basic matching;secondly, function matching will be done by ontology-based concept semantic similarity calculation method;finally, QoS-assured trust measure method will be designed to carry credible QoS matching. Compared with existing methods, the experimental results show that this method can not only automatically find the service to meet user' requirements, but also ensure the validity and reliability of service discovery.

关键词： Web services

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Multi-user private keyword search for cloud computing

Multi-user private keyword search for cloud computing

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2011 3rd IEEE International Conference on Cloud Computing Technology and science, CloudCom 2011

作者： Yang, Yanjiang Lu, Haibing Weng, Jian Institute for Infocomm Research Singapore Singapore Dept. of Operations Management and Information Systems Leavey School of Business Santa Clara University United States Department of Computer Science Emergency Technology Research Center of Risk Evaluation and Prewarning on Public Network Security Jinan University Guangzhou China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications China

ISBN: (纸本)9780769546223

Enterprises outsourcing their databases to the cloud and authorizing multiple users for access represents a typical use scenario of cloud storage services. In such a case of database outsourcing, data encryption is a good approach enabling the data owner to retain its control over the outsourced data. Searchable encryption is a cryptographic primitive allowing for private keyword based search over the encrypted database. The above setting of enterprise outsourcing database to the cloud requires multi-user searchable encryption, whereas virtually all of the existing schemes consider the single-user setting. To bridge this gap, we are motivated to propose a practical multi-user searchable encryption scheme, which has a number of advantages over the known approaches. The associated model and security requirements are also formulated. We further discuss to extend our scheme in several ways so as to achieve different search capabilities. © 2011 IEEE.

关键词： Outsourcing

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An Uncertainty Enhanced Trust Evolution Strategy for e-science

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Journal of computer science & Technology 2010年第6期25卷 1225-1236页

作者：杜薇崔国华刘伟 School of Computer Science and Technology Huazhong University of Science and Technology College of Computer Science and Technology Wuhan University of Technology State Key Lab of Software Engineering Wuhan University State Key Laboratory for Novel Software Technology Nanjing University

Resources shared in e-science have critical requirements on *** subjective trust management is essential to guarantee users＇ collaborations and communications on such a promising *** an important nature of subjective trust,uncertainty should be preserved and exhibited in trust definition,representation and *** the drawbacks of existing mechanisms based on random mathematics and fuzzy theory,this paper designs an uncertainty enhanced trust evolution strategy based on cloud model *** define subjective trust as trust *** we propose new algorithms to propagate,aggregate and update ***,based on the concept of similar cloud,a method to assess trust level is put *** simulation results show the effiectiveness,rationality and efficiency of our proposed strategy.

关键词： cloud model theory similar cloud operator subjective trust trust cloud

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A General Sharing Model Based on Proxy Re-encryption

A General Sharing Model Based on Proxy Re-encryption

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International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Guojun Ma Qingqi Pei Yuchen Wang Xiaohong Jiang The State Key Laboratory of Integrated Services Networks Xidian University Xi'an China School of Electronic Engineering University of Electronic Science and Technology of China Chengdu China Key Lab of Computer Networks and Information Security of Ministry of Education Xidian University Xi'an China

关键词： Licenses Public key Computational modeling Encryption Educational institutions Law

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