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IEEE International Conference on Networking, Architecture and Storage

作者： Li, Yan Zhang, Yunquan Wang, Ke Guan, Wenhua Lab. of Parallel Software and Computational Science ISCAS Beijing China State Key Lab. of Computer Science CAS Beijing China Graduate University Chinese Academy of Sciences Beijing China

ISBN: (纸本)9780769541341

Matrix multiplication is one of the most common and vital numerical operations in the field of scientific computing, which is the kernel routine of Level 3 BLAS. The STI CELL processor is a heterogeneous multiprocessor with a unique design to achieve peak floating point performance. As matrix multiplication operation is essential for a wide range of numerical algorithms and single improvement to the GEMM routine immediately can benefits the entire algorithm. In this paper, we provide a new way to utilize the hardware features of Cell to achieve better performance on the single precision general matrix multiplication (SGEMM), by using both of heterogeneous PPEs and SPEs parallelization, our method gain speedup over the Cell SDK. © 2010 IEEE.

关键词： Cells

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Interactive browsing of large images on multi-projector display wall system

Interactive browsing of large images on multi-projector disp...

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12th International Conference on Human-computer Interaction, HCI International 2007

作者： Zhongding, Jiang Xuan, Luo Yandong, Mao Binyu, Zang Hai, Lin Hujun, Bao Computer Graphics Lab. Software School Fudan University Shanghai China State Key Lab. of CAD and CG Zhejiang University Hangzhou China

ISBN: (纸本)9783540731061

With the precision of data acquisition increases, large images that may occupy terabytes, become common in research and industry fields. Since multi-projector display wall systems can provide higher resolution, they becomes paramount to display the large images. In this paper, we present one large image viewing system designed for display wall system. Our system need not totally downloading the whole image data to each rendering node. It enables users to browse the out-of-core images in real time using data streaming techniques. In the system, the original out-of-core raw image is compressed and represented using one hierarchical structure in multi-resolution manner. We design one proxy architecture that interactive streams data from remote data server to all rendering nodes. Our system allows users to interactively pan, and zoom the large images with versatile graphical user interface. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Image retrieval

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High level architecture evolved modular federation object model

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Journal of systems Engineering and Electronics 2009年第3期20卷 625-635页

作者： Wang Wenguang Xu Yongping Chen Xinx Chen Xin Li Qun Wang Weiping Coll. of Information System and Management National Univ. of Defense Technology Changsha 410073 P. R. China Beijing Key Lab. of Intelligent Telecommunications Software and Multimedia Beijing Univ. of Posts and Telecommunications Beijing 100876 P. R. China State Key Lab. for Complex Systems Simulation Beijing 100101 P. R. China

To improve the agility, dynamics, composability, reusability, and development efficiency restricted by monolithic federation object model （FOM）, a modular FOM is proposed by high level architecture （HLA） evolved product development group. This paper reviews the state-of-the-art of HLA evolved modular FOM. In particular, related concepts, the overall impact on HLA standards, extension principles, and merging processes are discussed. Also permitted and restricted combinations, and merging rules are provided, and the influence on HLA interface specification is given. The comparison between modular FOM and base object model （BOM） is performed to illustrate the importance of their combination. The applications of modular FOM are summarized. Finally, the significance to facilitate compoable simulation both in academia and practice is presented and future directions are pointed out.

关键词： model federation object model review modular federation object model base object model composability high level architecture evolved simulation.

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Extensions of standard Z refinement relation for multiple viewpoints oriented requirements method

Extensions of standard Z refinement relation for multiple vi...

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39th International Conference of Object-Oriented Languages and systems (TOOLS 39)

作者： Yanxiang, H. Qiang, S. Qian, H. School of Computer State Key Lab. of Software Eng. Wuhan University Wuhan 430072 China

This paper we extend the standard Z refinement relation for maltiple viewpoints oriented requirements method (MVORM). The original motivation is that we found the standard Z refinement is not adequate or correct when considering specifications that have temporal relationships of operations. We do our work under a generic framework of MVORM. The concept of temporal state variables is introduced into Z. Then new implementation relations are defined and new refinement relations are deduced, mainly for temporal state variables to process temporal relationships of operations. We use state transition system to abstract temporal state transitions. A simple example is used to show the usage of MVORM.

关键词： Requirements engineering

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Unistroke gestures on multi-touch interaction: Supporting flexible touches with key stroke extraction 12

Unistroke gestures on multi-touch interaction: Supporting fl...

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2012 17th ACM International Conference on Intelligent User Interfaces, IUI'12

作者： Jiang, Yingying Tian, Feng Zhang, Xiaolong Liu, Wei Dai, Guozhong Wang, Hongan Intelligence Engineering Lab. Institute of Software Chinese Academy of Sciences Beijing China Pennsylvania State University United States State Key Lab. of Computer Science Institute of Software Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781450310482

Gesture inputs on multi-touch tabletops usually involve multiple fingers (more than two) and casual touchdowns or liftoffs of fingers. This flexibility of touch gestures allows more natural user interaction, but also poses new challenges for accurate recognition of multi-touch gestures. To address these challenges, we propose a new approach to recognize flexible multi-touch stroke gestures on tabletops. Based on a user study on multi-touch unistroke gestures, we develop a gesture recognition method by extracting key strokes embedded in flexible multi-touch input. Our evaluation study result shows that this method can greatly improve the recognition accuracy of flexible multi-touch unistroke gestures on tabletops. Copyright © 2012 ACM.

关键词： Gesture recognition

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A method for avoiding the searching bias in ACO deceptive problem solving

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Web Intelligence and Agent systems 2014年第1期12卷 51-62页

作者： Chen, Bolun Chen, Ling Sun, Haiying Department of Computer Science Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Computer Science and Engineering Yangzhou University Yangzhou 225127 China State Key Lab. of Novel Software Tech Nanjing University Nanjing 210093 China

Ant colony optimization (ACO), an intelligential optimization algorithm, has been widely used to solve combinational optimization problems. One of the obstacles in applying ACO is that its search process is sometimes biased by algorithm features such as the pheromone model and the method of constructing the solutions. Due to such searching bias, ant colony optimization cannot converge to the optimal solutions of deceptive problems. The goal of our study is to find an effective method to avoid such searching bias and to achieve high performance of ACO on deceptive problems. In this paper, we present a method for avoiding the searching bias in the first order deceptive problem of ACO taking the n-bit trap problem as an instance. Convergence analysis of our method is also given. Our experimental results confirm the correctness of our theoretical analysis and show that our method can effectively avoid the searching bias and can ensure both the convergence in value and the convergence in solution for the first order deceptive problems. © 2014 - IOS Press and the authors. All rights reserved.

关键词： Ant colony optimization

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Social-aware relay node selection in delay tolerant networks

Social-aware relay node selection in delay tolerant networks

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2013 IEEE 2013 22nd International Conference on computer Communication and Networks, ICCCN 2013

作者： Wei, Kaimin Zeng, Deze Guo, Song Xu, Ke State Key Lab. of Software Development Environment Beihang University China School of Computer Science and Engineering University of Aizu Japan

ISBN: (纸本)9781467357746

In Delay Tolerant Networks (DTNs), the connections between mobile nodes are intermittent and constant end-to-end paths rarely exist. In order to achieve high delivery ratio, most existing DTN routing algorithms favor the ''multi-hop forwarding'' fashion where a message can be forwarded by multiple relay nodes in the hope that one of the employed relay nodes can deliver the message to the destination node. Since aggressively employing relay nodes may incur intolerable delivery cost to resource-constrained mobile nodes in DTNs, it is significant to design a cost-efficient routing protocol that can achieves high delivery ratio. In this paper, we first utilize the small-world feature to limit the maximum forwarding hops in a reasonable way and then propose a greedy relay node selection strategy. A cost-efficient social-aware forwarding algorithm called TBSF (the-best-so-far) is then presented. Extensive simulations on real mobility traces are conducted to evaluate the performance of TBSF. Simulation results show that, in comparison with several well-known routing algorithms, TBSF can achieve high performance in terms of delivery ratio and delivery delay while with much lower delivery cost. © 2013 IEEE.

关键词： Delay tolerant networks

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Rationale management challenges in requirements engineering

Rationale management challenges in requirements engineering

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作者： Liang, Peng Avgeriou, Paris He, Keqing State Key Lab. of Software Engineering Computer School Wuhan University China Department of Computing Science University of Groningen Netherlands

ISBN: (纸本)9781424487837

Rationale and rationale management have been playing an increasingly prominent role in software system development mainly due to the knowledge demand during system evaluation, maintenance, and evolution, especially for large and complex systems. The rationale management for requirements engineering, as a commencing and critical phase in software development life cycle, is still under-exploited. In this paper, we first survey briefly the state-of-the-art on rationale employment and applications in requirements engineering. Secondly, we identify the challenges in integrating rationale management in requirements engineering activities in order to promote further investigations and define a research agenda on rationale management in requirements engineering. ©2010 IEEE.

关键词： Knowledge management

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The optimized key distribution scheme in threshold RSA 04

The optimized key distribution scheme in threshold RSA

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3rd International Conference on Information Security, InfoSecu '04

作者： Jing-Song, Cui Rong, Peng Li-Na, Wang School of Computer Science Wuhan University Wuhan 430072 China State Key Lab. of Software Engineering Wuhan 430072 China

ISBN: (纸本)1581139551

The (t, n) threshold RSA algorithm enables the system to keep the security and availab.lity of the private key without a trusted dealer when parts of system are already under attack. In the traditional threshold RSA sub key distribution scheme, each party that shares the private key must keeps C nt sub keys secretly in order to enable the whole system to reconstruct the original private key by any t out of n parties. This paper presents a scalab.e searching algorithm, which can find out the optimized sub key distribution scheme that can significantly decrease the number of sub keys that should be held by each party without weakening the system's security. Thus it can reduce the complexity of key management and related operations. Copyright 2004 ACM.

关键词： security threshold RSA key distribution

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Constructing the robust and efficient small world overlay network for P2P systems

Constructing the robust and efficient small world overlay ne...

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3rd International Symposium on Parallel and Distributed Processing and Applications, ISPA 2005

作者： Feng, Guofu Mao, Ying-Chi Chen, Dao-Xu Department of Computer Science and Technology Nanjing University State Key Lab. for Novel Software Technology Nanjing Jiangsu 210093 China

ISBN: (纸本)3540297693

The current P2P application protocols are usually constructed over the application-level overlay network. However, because the users in the P2P systems always follow a very dynamic mode, the overlay network with poor performance will leads to the problem of connectivity - The departures of peers often break the network into plenty of small parts, and results in the resource islands. Although increasing the links between peers can enhance the performance of connectivity by information redundancy. But it will lead to the severe cost of maintenance. Then there is an urgent need to integrate the online peers as a "giant component" as large as possible, so that the resources online can be shared completely;at the same time to guarantee the cost of maintenance as little as possible. And due to the prevalence and significance of small world in reality and theory, in this paper we analyzed the correlation between the shortcuts density and the connectivity, as well as the impact of shortcuts density to robustness over the popular WS Small World model. At last, numerical simulation was done to confirm our analytic results. © Springer-Verlag Berlin Heidelberg 2005.

关键词： computer networks

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