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中国密码学会2011年会

作者： Song Luo Yu Chen Zhong Chen College of Computer Science and Engineering Chongqing University of Technology Chongqing 400054 P Institute of Information Engineering Chinese Academy of Sciences Beijing 100190 P.R.China Instit Institute of Software School of Electronics Engineering and Computer SciencePeking University Bei

Dual system encryption is a new powerful methodology first proposed by Waters in CRYPTO 2009 which can be used to prove full security (or adaptive security) for identity-based encryption and its extensions, e.g., hierarchical identity-based encryption (HIBE) or attribute-based encryption (ABE) *** this paper, We consider the application of dual system *** on dual system encryption, we propose a generic construction of fully secure schemes.

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Dynamic Resource Allocation Based on User experience in Virtualized Servers

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Procedia engineering 2011年 15卷 3780-3784页

作者： Wei Zhang Jiajun Liu Ying Song Mingfa Zhu Limin Xiao Yuzhong Sun Li Ruan State Key Laboratory of Software Development Environment Beijing 100191 China School of Computer Science and Engineering Beihang University Beijing 100191 China Key Laboratory of Computer System and Architecture Chinese Academy of SciencesBeijing Institute of Computing Technology Chinese Academy of Sciences Beijing China

Web workloads are known to vary dynamically with time which poses a challenge to resource allocation among the applications. In this paper, we argue that the existing dynamic resource allocation based on resource utilization has some drawbacks in virtualized servers. Dynamic resource allocation directly based on real-time user experience is more reasonable and also has practical significance. To address the problem, we propose a system architecture that combines real time measurements and analysis of user experience for resource allocation. We evaluate our proposal using Webbench. The experiment results show that these techniques can judiciously allocate system resources.

关键词： resource allocation virtualized servers user experience

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Homomorphic Linear Authentication Schemes for Proofs of Retrievability

Homomorphic Linear Authentication Schemes for Proofs of Retr...

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International Conference on Intelligent Networking and Collaborative Systems (INCOS)

作者： Shengli Liu Kefei Chen Department of Computer Science and Engineering Shanghai Jiaotong University Shanghai China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing China

In a proof of retrievability (POR) system, interactive POR protocols are executed between a storage server and clients, so that clients can be convinced that their data is available at the storage server, ready to be retrieved when needed. In an interactive POR protocol, clients initiate challenges to the server, and the server feedbacks responses to clients with input of the stored data. Retrievability means that it should be possible for a client to extract the his/her data from the server's valid responses. An essential step-stone leading to retrievability is server's unforgeability of valid responses, i.e, any server coming up valid responses to a client's challenges is actually storing the client's data with overwhelming probability. Unforgeability can be achieved with authentication schemes like MAC, Digital Signature, etc. With homomorphic linear authentication schemes, the authenticators can be aggregated into one tag for the challenges, hence reducing the communication complexity. In this paper, we explore some new homomorphic linear authenticator schemes in POR to provide unforgeability. Compared with the recent work of Shacham and Waters, our scheme enjoys the same shortest responses, but reduces the local storage from O(s) to O(1).

关键词： Games Authentication Servers Protocols Data mining Vectors

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Region-based active contour with neighborhood information for image segmentation

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content Technology and its Applications 2011年第10期5卷 322-329页

作者： Yang, Mingyu Liu, Jin Zhang, Wensheng Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of software Engineering Computer School Wuhan University Wuhan 430072 China

Intensity inhomogeneous images, especially medical images, widely exist in real world. Considering that the existing methods can not solve intensity inhomogeneous images segmentation properly, this paper proposes a region-based active contour model with neighborhood information. Different from existing models using global region information, the new model incorporates local information of an image into a level set formulation. By defining a new energy functional for every pixel in the image domain and utilizing the information of neighborhoods, the proposed model has the ability to extract local details, thus can segment images with intensity inhomogeneity. We also present a new approximation of the Heaviside function and Dirac function. Experimental results demonstrate that the new model has desirable performance, which is more precise than the Chan-Vese model and much faster than the Piecewise Smooth model.

关键词： Image segmentation

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A Decomposition-Based Approach to OWL DL Ontology Diagnosis

A Decomposition-Based Approach to OWL DL Ontology Diagnosis

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International Conference on Tools for Artificial Intelligence (ICTAI)

作者： Jianfeng Du Guilin Qi Jeff Z. Pan Yi-Dong Shen Guangdong University of Foreign Studies (GDUFS) Guangzhou China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing China School of Computer Science and Engineering South East University NanJing China Department of Computing Science University of Aberdeen Aberdeen UK

Computing all diagnoses of an inconsistent ontology is important in ontology-based applications. However, the number of diagnoses can be very large. It is impractical to enumerate all diagnoses before identifying the target one to render the ontology consistent. Hence, we propose to represent all diagnoses by multiple sets of partial diagnoses, where the total number of partial diagnoses can be small and the target diagnosis can be directly retrieved from these partial diagnoses. We also propose methods for computing the new representation of all diagnoses in an OWL DL ontology. Experimental results show that computing the new representation of all diagnoses is much easier than directly computing all diagnoses.

关键词： Ontologies OWL Educational institutions Semantics Computational modeling Grounding Protons

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Multi-granularity dynamic analysis of complex software networks

Multi-granularity dynamic analysis of complex software netwo...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Bing Li Weifeng Pan Jinhu Lü State Key Laboratory Software Engineering and School Computer and Complex Network Research Center Wuhan University of China Wuhan China State Key Laboratory Software Engineering Wuhan University of China Wuhan China School Electrical Computer Engineering RMIT University Melbourne Australia Acad. Mathematics System Science Chinese Academy and Sciences Beijing China

software systems represent one of the most complex man-made systems. In this paper, we analyze the evolution of Object-Oriented (OO) software using complex network theory from a multi-granularity perspective. First, the software net works are constructed for a multi-version software system at different levels of granularity. Then, some parameters used in complex network theory are introduced to study the topological characteristics of these software networks. By investigating the parameters' values in consecutive software networks, we have a better understanding about software evolution. A case study on an open source OO project, Azureus, is conducted as an example to illustrate our approach. It uncovers some underlying dynamic characteristics of OO systems. These results provide a different dimension to our understanding of software system dynamics and also are very useful for the design and development of OO software systems.

关键词： Logic gates Communities US Department of Defense

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Author Index Volume 7 (2011)

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Multiagent and Grid Systems 2011年第6期7卷 311-313页

作者： [ Systems Research Institute Polish Academy of Sciences Warsaw and University of Gdansk Warsaw Poland Systems Research Institute Polish Academy of Sciences Warsaw and Management Academy Warsaw Poland Software Engineering Department Faculty of Automatics Computers and Electronics University of Craiova Bvd.Decebal Craiova Romania University of Duisburg-Essen Institute for Computer Science and Business Information Systems (ICB) Practical Computer Science Data Management Systems and Knowledge Representation Essen Germany

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Synchronization-based scalability of rings and chains of dense lumps

Synchronization-based scalability of rings and chains of den...

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作者： Lu, Jun-An Zhang, Yong Chen, Juan Lü, Jinhu Wu, Xiaoqun School of Mathematics and Statistics Wuhan University Wuhan 430072 China State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China School of Electrical and Computer Engineering RMIT University Melbourne VIC 3001 Australia

ISBN: (纸本)9789881725592

This paper aims to investigate the scalability of synchronizability for the complex clustering networks of dense rings or chains with the network scale increasing. Our results reveal that the synchronizability of the above complex clustering networks decreases with the network scale increasing for any clustering structures. When the network size is increasing, the increase of the number of clusters decreases the synchronizability much faster than the increase of the size of individual cluster. Moreover, it is found that the ring or the chain structure has much greater influence on weakening the network synchronizability than that of the clustering property. © 2011 Chinese Assoc of Automati.

关键词： Scalability

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A drum-buffer-rope based scheduling method for semiconductor manufacturing system

A drum-buffer-rope based scheduling method for semiconductor...

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IEEE International Conference on Automation science and engineering (CASE)

作者： Zhengcai Cao Yazhen Peng Yongji Wang College of Information Science and Technology Beijing University of Chemical Technology Beijing China State Key Laboratory of Manufacturing Systems Engineering Xi'an Jiaotong University Xian China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences (CAS) Beijing China

Scheduling in semiconductor manufacturing system is an important task for the industries faced with a large amount of resource competitions. Effective scheduling can improve the overall system performance and customer satisfaction. In this paper, a scheduling method with the core of bottleneck equipment control is designed referring to Drum-Buffer-Rope (DBR) theory. In order to identify the main-bottleneck, the relative load which takes the feature of reentrance into consideration is applied. For the avoidance of local blocking, the management of sub-bottleneck is presented. As both releasing and dispatching are taken into account, a scheduling method based on the compound priority is formed. Finally, HP-24 semiconductor wafer fabrication is used as an example to demonstrate the effectiveness of the proposed method.

关键词： Job shop scheduling Distributed Bragg reflectors Object oriented modeling Semiconductor device modeling Workstations Fabrication Dispatching

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RASS: A real-time, accurate and scalable system for tracking transceiver-free objects

RASS: A real-time, accurate and scalable system for tracking...

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IEEE International Conference on Pervasive Computing and Communications (PerCom)

作者： Dian Zhang Yunhuai Liu Lionel M. Ni College of Software Shenzhen University China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong China Shenzhen Institutes of Advanced Technology Chinese Academy and Sciences China Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University China

Transceiver-free object tracking is to trace a moving object without carrying any communication device in an environment where the environment is pre-deployed with some monitoring nodes. Among all the tracking technologies, RF-based technology is an emerging research field facing many challenges. Although we proposed the original idea, until now there is no method achieving scalability without sacrificing latency and accuracy. In this paper, we put forward a real-time tracking system RASS, which can achieve this goal and is promising in the applications like the safeguard system. Our basic idea is to divide the tracking field into different areas, with adjacent areas using different communication channels. So the interference among different areas can be prevented. For each area, three communicating nodes are deployed on the ceiling as a regular triangle to monitor this area. In each triangle area, we use a Support Vector Regression (SVR) model to locate the object. This model simulates the relationship between the signal dynamics caused by the object and the object position. It not only considers the ideal case of signal dynamics caused by the object, but also utilizes their irregular information. As a result it can reach the tracking accuracy to around 1m by just using three nodes in a triangle area with 4m in each side. The experiments show that the tracking latency of the proposed RASS system is bounded by only about 0.26s. Our system scales well to a large deployment field without sacrificing the latency and accuracy.

关键词： Accuracy Wireless communication Wireless sensor networks Interference Lead Synchronization Predictive models

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