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International Conference on Management and Service Science, MASS 2009

作者： Zhang, Xiaoyong Dou, Wanfeng School of Computer Science and Technology Jiangsu Research Center of Information Security and Confidential Engineering Nanjing Normal University 210097 China School of Computer Science and Technology Key Lab. of Virtual Geographic Environment Nanjing Normal University 210097 China

ISBN: (纸本)9781424446391

The synchronized collaborative design within heterogeneous CAD systems becomes a significant challenge because of the great difference between the modeling operations and underground data structures of different systems. In order to enable it, this paper researches an approach to constructing the neutral modeling command set, an important part of synchronized collaborative design systems, to build the mapping of operations among different CAD systems. A prototype is developed based on the neutral modeling command set to verify the feasibility of the proposed approach. ©2009 IEEE.

关键词： computer aided design

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An efficient strategy for enhancing robustness and immunization in wireless sensor networks

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Journal of Networks 2009年第3期4卷 170-177页

作者： Shu-Kui, Zhang Sheng-Rong, Gong Zhi-Ming, Cui Quan, Liu Institute of Computer Science and Technology Soochow University Suzhou 215006 China Jiangsu Provincial Key Laboratory of Computer Information Processing Technology Soochow University Suzhou 215006 China

To provide cost-effective protection for sensor networks, We introduce an immunization method where the percentage of required vaccinations for immunity are close to the optimal value of a targeted immunization scheme. Our strategy retains the advantage of being purely local, without the need of knowledge on the global network structure. The method consists of selecting the vertex with the highest degree within a distance d and asking for a neighbor that has more links than himself or more than a given threshold and immunizing him. Analysis and simulation results show that the above method is valid. It enhances network robustness against virus and provide useful hints in the search of optimal immunization strategies as the development and deploying of a sensor network system. © 2009 ACADEMY PUBLISHER.

关键词： Complex networks

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SAR image despeckling based on edge detection and nonsubsampled second generation bandelets

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Journal of Systems Engineering and Electronics 2009年第3期20卷 519-526页

作者： Zhang Wenge~(1,2),Liu Fang~(1,2),Jiao Licheng~(2,3)& Gao Xinbo~(2,3) 1.School of computer Science and technology,Xidian Univ.,Xi’an 710071,P.R.China 2.key lab.of Intelligent Perception and Image Understanding of Ministry of Education of China,Xi’an 710071,P.R.China 3.Inst,of Intelligent information processing,Xidian Univ.,Xi’an 710071,P.R.China School of Computer Science and Technology Xidian Univ. Xi'an 710071 P. R. China Key Lab. of Intelligent Perception and Image Understanding of Ministry of Education of China Xi'an 710071 P. R. China Key Lab. of Intelligent Perception and Image Understanding of Ministry of Education of China Xi'an 710071 P. R. China Inst. of Intelligent Information Processing Xidian Univ. Xi'an 710071 P. R. China

To preserve the sharp features and details of the synthetic aperture radar （SAR） image effectively when despeckling, a despeckling algorithm with edge detection in nonsubsampled second generation bandelet transform （NSBT） domain is proposed. First, the Canny operator is utilized to detect and remove edges from the SAR image. Then the NSBT which has an optimal approximation to the edges of images and a hard thresholding rule are used to approximate the details while despeckling the edge-removed image. Finally, the removed edges are added to the reconstructed image. As the edges axe detected and protected, and the NSBT is used, the proposed algorithm reaches the state-of-the-art effect which realizes both despeckling and preserving edges and details simultaneously. Experimental results show that both the subjective visual effect and the mainly objective performance indexes of the proposed algorithm outperform that of both Bayesian wavelet shrinkage with edge detection and Bayesian least square-Gaussian scale mixture （BLS-GSM）.

关键词： computer image processing synthetic aperture radar speckle edge detection nonsubsampled second generation bandelet transform Canny operator threshold shrinkage.

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Sub-sentence division for tree-based machine translation

Sub-sentence division for tree-based machine translation

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Joint Conference of the 47th Annual Meeting of the Association for Computational Linguistics and 4th International Joint Conference on Natural Language processing of the AFNLP, ACL-IJCNLP 2009

作者： Xiong, Hao Xu, Wenwen Mi, Haitao Liu, Yang Liu, Qun Key Lab. of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences P.O. Box 2704 Beijing 100190 China Key Lab. of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences P.O. Box 2704 Beijing 100190 China

ISBN: (纸本)9781617382581

Tree-based statistical machine translation models have made significant progress in recent years, especially when replacing 1-best trees with packed forests. However, as the parsing accuracy usually goes down dramatically with the increase of sentence length, translating long sentences often takes long time and only produces degenerate translations. We propose a new method named subsentence division that reduces the decoding time and improves the translation quality for tree-based translation. Our approach divides long sentences into several sub-sentences by exploiting tree structures. Large-scale experiments on the NIST 2008 Chinese-to-English test set show that our approach achieves an absolute improvement of 1.1 BLEU points over the baseline system in 50% less time. © 2009 ACL and AFNLP.

关键词： Machine translation

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Application of learning Vector quantization network on web pages classification in agricultural website

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Journal of information and Computational Science 2009年第1期6卷 139-145页

作者： Fu, Zetian Wang, Chuanyi Zhao, Ming Liu, Lixin Zhang, Xiaoshuan China Agricultural University Beijing 100083 China Jiangsu Provincial Key Laboratory of Computer Information Processing Technology Suzhou University Suzhou 215000 China

VQ (Learning Vector Quantization) is kind of supervised and competitive learning artificial neural network and adopted in many domains, such as pattern categorization, products classification, mechanical detection. This paper proposes a new application, which integrates LVQ network with Central Vector classification method on agricultural products web pages classification as key function of the vertical search engine. The experiment shows that LVQ has higher precision compared with CPN network and the precision increases more quickly with the increasing of training numbers. © 2009 Binary information Press.

关键词： Websites

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An Improved AODV Routing Protocol Based on Remaining Power and Fame

An Improved AODV Routing Protocol Based on Remaining Power a...

引用

International Conference on Electronic computer technology

作者： Daming Feng Yanqin Zhu Provincial Key Laboratory of Computer Information Processing Technology Soochow University Suzhou China Soochow University Suzhou Jiangsu CN

ISBN: (纸本)9781424435623

Almost all proposed routing protocols are based on minimum hops in mobile ad hoc network. But through the research on the real communication of wireless nodes, we find that sometimes the path which has the minimum hops from the source to the destination may not be the best path. Considered the remaining power and the node selfishness, we propose an improved AODV routing protocol, I-AODV in this paper. We use a new term, node status, regard the node status as a function of the remaining power and the fame and regard the node status as the basic condition for choosing the next hop in the new routing protocol.

关键词： Routing protocols Ad hoc networks Monitoring Mobile ad hoc networks laboratories computer networks information processing Mobile communication Wireless communication Data communication

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A policy language for expressing access control properties in PDAC model

A policy language for expressing access control properties i...

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International Conference on computer Science & Education (ICCSE)

作者： Xian Wu Peide Qian School of Computer Science and Technology Jiangsu Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou China School of Computer Science and Technology Soochow University Suzhou China

An access control policy defines what is authorized, and an access control mechanism implements the policy to ensure that all accesses are in accordance with the underlying policy. Nowadays, many researcher are working for expressing access policies in a formal way. But it is still an open problem. This paper defines a policy language, which is named as PDPL to express access policies and access control properties in PDAC model [1]. This language unifies ldquoBANrdquo logic with past- and future- time temporal logic. We give the syntax and semantics of PDPL, and provided some examples with their English equivalents. This logic language can express belief and authorization in access control model. And it can deal with delegations of decision-making directly. It is easy for us to formulate the properties of interest in distributed systems of PDAC model through PDPL. This logical language is part of a formal system, and it will be used in an automatic model checker in the future.

关键词： Access control Logic Natural languages computer science Educational technology Engines Contracts Body sensor networks Authorization computer science education

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A Character Detection Algorithm in DCT Domain for Video

A Character Detection Algorithm in DCT Domain for Video

引用

Chinese Conference on Pattern Recognition (CCPR)

作者： Ningbo Zhu Weiming Dai Gaobo Yang Gang Wang College of Computer and Communication Hunan University Changsha China Jiangsu Province Computer Information Processing Technology Key Laboratory Suzhou University Suzhou China

A DCT-domain based character detection algorithm is proposed for video stream. It utilizes the directional features of the texture in character blocks and the property that the characters in video usually distribute in row or column. The character/non-character blocks are effectively separated by a new adaptive threshold, then the noise and false text regions are further removed by morphological operation. Finally, the text regions are accurately obtained by horizontal and vertical projection. Experimental results demonstrate that the proposed approach can detect characters accurately even in video with complex background , and it is of good robustness and high practical value.

关键词： Detection algorithms Discrete cosine transforms TV Educational institutions information processing laboratories Streaming media Morphological operations Video compression Noise robustness

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Research of secure intranet/internet access platform based on ontology

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Journal of Networks 2009年第10期4卷 1009-1016页

作者： Shen, Shigen Ye, Lihua Yue, Guangxue Yu, Fei College of Mathematics and Information Engineering Jiaxing University Jiaxing China College of Computer and Communication Hunan University Changsha China Department of Computer Science and Technology Huaihua University Huaihua China Jiangsu Provincial Key Laboratory of Computer Information Processing Technology Suzhou China

Faced with the general trend of centralization of information, the biggest challenge to enterprise is how to ensure that all fixed computers and different mobile devices anywhere can access securely and quickly enterprise's businesses. To solve this problem, an Ontology-based Secure intranet/Internet Access Platform (OSAP) is presented. Ontology has been applied to the field of software resources sharing. Software resource ontology is defined for building the foundation of Software Resource Ontology Sharing Model (SROSM) and the OSAP. The OSAP framework is presented by semantic modeling based on SROSM for providing users with better and higher QOS in sharing software resources. The OSAP is designed with OSAP Portal, Connection Module, Session Management Module, Security Module, RDP Module, and Bitmap Caching Module. The design ideas and functionalities of all modules are introduced. Based on the open Remote Desktop Protocol (RDP), the OSAP prototype is realized and key technologies including client display, data compression and security are described. To guarantee data transmission security and avoid access problem due to the firewall obstructing port 3389, the SSL protocol is employed to encapsulate RDP data packages between clients and OSAP as the RDP is used between OSAP and Terminal Services servers. Experimental results demonstrate that the OSAP has better performance involving response time, network usage, RAM usage and CPU usage. © 2009 ACADEMY PUBLISHER.

关键词： Ontology

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Towards keyword search over relational databases in DHT networks

Towards keyword search over relational databases in DHT netw...

引用

15th International Conference on Parallel and Distributed Systems, ICPADS '09

作者： Yu, Jian Guan, Jihong Xu, Jianliang Zhou, Shuigeng Department of Computer Science and Technology Tongji University Shanghai 201804 China Department of Computer Science Hong Kong Baptist University Hong Kong Hong Kong Shanghai Key Lab. of Intelligent Information Processing Fudan University Shanghai 200433 China School of Computer Science Fudan University Shanghai 200433 China

ISBN: (纸本)9780769539003

Recent research has shown that keyword search is a friendly and potentially effective way to retrieve information of interest over relational databases. Existing work has generally focused on implementing keyword search in centralized databases. This paper addresses keyword search over distributed databases. We adopts distributed hash tables (DHTs) - a peer-to-peer inspired overlay network technology - as the infrastructure to implement keyword search over relational databases. For this end, we combine IR-based ranking techniques with a P2P-based indexing strategy, and propose an effective approach. Extensive experiments over real-world datasets show that our approach is effective and efficient. © 2009 IEEE.

关键词： Peer to peer networks

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