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Real-Time Systems Symposium (RTSS)

作者： Shaojie Tang Xiang-Yang Li Haitao Zhang Jiankang Han Guojun Dai Cheng Wang Xingfa Shen Department of Computer Science Illinois Institute of Technology Chicago IL USA TNLIST School of Software Tsinghua University China Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia Beijing University of Posts and Telecommunications China Institute of Computer Application Technology Hangzhou Dianzi University Hangzhou China Department of Computer Science Tongji University Shanghai China

We present TelosCAM, a networking system that integrates wireless module nodes (such as TelosB nodes) with legacy surveillance cameras to provide storage-efficient and privacy-aware services of accurate, real time tracking and identifying of the burglar who stole the property. In our system, a property owner will have a wireless module node (called secondary module) attached to the property that s/he wants to protect. The secondary wireless module node will not store any personal information about the owner, nor any specific information about the property to be protected. Each user of the system will also have a unique wireless module node (called primary module) that contains some security information about the user, thus should be privately held by the user and be kept to the user always. Once a tracking process is triggered in privacy preserving manner, the secondary module will start sending out the alarm signal periodically. The alarm signal will be captured by some surveillance wireless module, integrated with existing surveillance cameras. Using the trajectory information provided by the secondary wireless module node, and the videos captured by the surveillance cameras, our system will then automatically pinpoint a burglar (e.g., a person or a car) that is more likely to carry the stolen property. Our extensive evaluation of the system shows that we can find the burglars with surprisingly high accuracy under various experiment settings, with significantly reduced storage-requirement of the legacy video surveillance system. It also can help the police to catch the burglars more efficiently by providing critical images or videos containing the burglars.

关键词： Wireless communication Videos Cameras Surveillance Communication system security Wireless sensor networks Trajectory

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中国计算机科学前沿 2010年第4期4卷 500-515页

作者： Ye TIAN Bangchuan LIU Zhenhua HE Anhui Province Key Laboratory on High Performance Computing and Application School of Computer Science and TechnologyUniversity of Science and Technology of ChinaHefei 230027China

With the success of lnternet video-on-demand (VoD) streaming services, the bandwidth required and the financial cost incurred by the host of the video server becoming extremely large. Peer-to-peer (P2P) networks and proxies are two common ways for reducing the server workload. In this paper, we consider a peer-assisted Internet VoD system with proxies deployed at domain gateways. We formally present the video caching problem with the objectives of reducing the video server workload and avoiding inter-domain traffic, and we obtain its optimal solution. Inspired by theoretical analysis, we develop a practical protocol named PopCap for Internet VoD services. Compared with previous work, PopCap does not require additional infrastructure support, is inexpensive, and able to cope well with the characteristic workloads of Interact VoD services. From simulationbased experiments driven by real-world data sets from YouTube, we find that PopCap can effectively reduce the video server workload, therefore provides a superior performance regarding the video server's traffic reduction.

关键词： Internet video-on-demand (VoD) peer-to-peer (P2P) caching algorithm/protocol design and analysis

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The key techniques of scientific workflow system

The key techniques of scientific workflow system

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International Forum on Information technology and applications

作者： Liu, Yingbo Deng, Hui Wang, Feng Ji, Kaifan Computer Technology Application Key Laboratory Kunming University of Science and Technology Kunming 650051 China

ISBN: (纸本)9780769541150

Due to the requirements of scientific computational and data-intensive analysis, Scientific Workflow System (SWFs) technology is presented for remote resources data access and management under distributed infrastructures. The scientists are capable of using the system to address issues in their scientific domain. In this paper, firstly, we have an overview of the SWFs. Secondly, two types of scientific workflow systems are compared in the level of abstraction. And then we analyze and summarize the cross cutting issues of SWFs technology, that might be exploited in constructing workflow system effectively. We focus on the techniques, i.e., data provenance, fault tolerance and re-run. In the end, we make some suggestions towards improving SWFs.1. © 2010 IEEE.

关键词： Fault tolerance

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Context-specific miRNA regulation network predicts cancer prognosis

Context-specific miRNA regulation network predicts cancer pr...

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IEEE International Conference on Systems Biology

作者： Xionghui Zhou Juan Liu Changning Liu Simon Rayner Fengji Liang Jingfang Ju Yinghui Li Shanguang Chen Jianghui Xiong School of Computer Science Wuhan University Wuhan China Bioinformatics Research Group Key Laboratory of Intelligent Information Processing Advanced Computing Research Laboratory Institute of Computing Technology Chinese Academy of Sciences (CAS) Beijing China Bioinformatics Group State Key Laboratory of Virology Wuhan Institute of Virology Chinese Academy of Sciences (CAS) Wuhan China Bioinformatics Group and Data Coordination Center State Key Laboratory of Space Medicine Fundamentals and Application China Astronaut Research and Training Center Beijing China Department of Pathology Stony Brook University Medical Center New York USA

MicroRNAs can regulate hundreds of target genes and play a pivotal role in a broad range of biological process. However, relatively little is known about how these highly connected miRNAs-target networks are remodelled in the context of various diseases. Here we examine the dynamic alteration of context-specific miRNA regulation to determine whether modified microRNAs regulation on specific biological processes is a useful information source for predicting cancer prognosis. A new concept, Context-specific miRNA activity (CoMi activity) is introduced to describe the statistical difference between the expression level of a miRNA's target genes and non-targets genes within a given gene set (context).

关键词： Breast cancer Context Correlation Biological processes Metastasis Tumors

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A user model based on mobile environment

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Ruan Jian Xue Bao/Journal of Software 2011年第SUPPL. 2期22卷 120-128页

作者： Du, Yi Tian, Feng Dai, Guo-Zhong Wang, Feng Wang, Hong-An Intelligence Engineering Laboratory Institute of Software Chinese Academy of Sciences Beijing 100190 China School of Information Science and Engineering Graduate University Chinese Academy of Sciences Beijing 100190 China Yunnan Provincial Key Laboratory of Computer Application Kunming University of Science and Technology Kunming 650500 China

It's very important to help developers design user interface for application in an intelligent user interface. Nowadays, the number of mobile based applications increases greatly, but there are no proper user model to guide the design and development of user interface. This article takes different types of functions and parameters in consideration, and proposes a user model and user modeling method based on activity theory. In addition, this article describes the improved VSM algorithm in detail. Finally, an application and an informal experiment are designed to prove the efficiency of given user model. This work can be used to guide the design and development of mobile user interface under mobile environment. ©2011 Journal of Software.

关键词： User interfaces

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Research on knowledge base of science and technology

Research on knowledge base of science and technology

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2010 International Conference on Computational and Information Sciences, ICCIS2010

作者： Chen, Xing Hong, Kun Wang, Hai-Tao Yunnan Provincial Key Laboratory of Computer Application Kunming University of Science and Technology Kunming China Institute of Science and Technology Information of Kunming Kunming China

ISBN: (纸本)9780769542706

Statistics of science and technology is not only a daily task of technology sector, but also an important reference for government decision. How it is possible to deal statistics data by computer system automatically? It is a goal for information system specialists and scientific and technical workers. We studied many documentations and reports of statistics for science and technology in Kunming and other province. So we provided a knowledge base of statistics based categories theory and ontology, and found the computing principle on the knowledge base. Our innovation is the way to build the knowledge base for statistics of science and technology which can accommodate all the statistics information of concepts and specification and design and perform strategies people desired. This paper provided ideas to statistics computing automatically. © 2010 IEEE.

关键词： Statistics

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Research on information metadata standards of knowledge organization: A case study of Chinese digital library

Research on information metadata standards of knowledge orga...

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2010 International Conference on Computational and Information Sciences, ICCIS2010

作者： Hong, Kun Hu, Jingrong Chen, Xing Institute of Science and Technology Information of Kunming Kunming China Yunnan Provincial Key Laboratory of Computer Application Kunming University of Science and Technology Kunming China

ISBN: (纸本)9780769542706

Information metadata is very important in information resource sharing system. How to do knowledge organization better? Based on metadata and ontology we research on a few Chinese Digital Library Sharing Systems and give some standards of knowledge organization. This paper provided new ideas to build information sharing system as the view of metadata and ontology. © 2010 IEEE.

关键词： Knowledge organization

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Research on the categories of a formal language

Research on the categories of a formal language

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2010 International Conference on Computational and Information Sciences, ICCIS2010

作者： Chen, Xing Hu, Jing-Rong Hong, Kun Yunnan Provincial Key Laboratory of Computer Application Kunming University of Science and Technology Kunming China Institute of Science and Technology Information of Kunming Kunming China

ISBN: (纸本)9780769542706

Formal languages involve many concepts such as string, grammar and semantics which are able to be described by "Categories". This paper provides two categories which are used for grammar and semantics in a context-free language, and the syntax analysis issue has been discussed in detail. This information may be useful for researcher concerning formalization methods. © 2010 IEEE.

关键词： Semantics

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An approach for textures classification and definition by categories

An approach for textures classification and definition by ca...

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2010 3rd International Congress on Image and Signal Processing, CISP 2010

ISBN: (纸本)9781424465149

Textures is one of the keys in image pattern recognition. To realize the computer vision for textures, it is necessary that understand textures rationally. The key of understanding textures is explaining them by the human's signs and approaches. We believe the mathematical structure of categories is similar to human's rational intelligence. In this paper, we describe the common textures by notes and term in categories theory. It means categories are useful for textures and image recognition. The combination of categories and neural network is worth to research which will gradually reveal the unity way of human's percept and rationality. ©2010 IEEE.

关键词： Image texture

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Asymptotic Analysis of Transmission Capacities for Overlaid Spread-Spectrum Wireless Networks

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China Communications 2010年第3期7卷 81-90页

作者： Huarui Wu Di Li Changchuan Yin Department of Computer Application National Engineering Research Center for Information Technology in Agriculture Beijing 100097 China Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

We study the transmission capacities of two coexisting spread-spectrum wireless networks (a primary network vs. a secondary network) that operate in the same geographic region and share the same spectrum. We defi ne transmission capacity as the product among the density of transmissions, the transmission rate, and the successful transmission probability. The primary (PR) network has a higher priority to access the spectrum without particular considerations for the secondary (SR) network, while the SR network limits its interference to the PR network by carefully controlling the density ofits transmitters. Considering two types of spread-spectrum transmission schemes (FH-CDMA and DS-CDMA) and the channel inversion power control mechanism, we quantify the transmission capacities for these two networks based on asymptotic analysis. Our results show that if the PR network permits a small increase ofits outage probability, the sum transmission capacities of the two networks (i.e., the overall spectrumefficiency per unit area) will be boosted significantly over that of a single network.

关键词： transmission capacity ad hoc network spread spectrum stochastic geometry

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