检索结果-内蒙古大学图书馆

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

来源：评论

学校读者我要写书评

暂无评论

Relationship classification in large scale online social networks and its impact on information propagation

Relationship classification in large scale online social net...

引用

IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： Shaojie Tang Jing Yuan Xufei Mao Xiang-Yang Li Wei Chen Guojun Dai Department of Computer Science Illinois Institute of Technology USA Department of Computer Science NanJing University China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications China Microsoft Research Asia China Institute of Computer Application Technology Hangzhou Dianzi University China

ISBN: (纸本)9781424499199

In this paper, we study two tightly coupled topics in online social networks (OSN): relationship classification and information propagation. The links in a social network often reflect social relationships among users. In this work, we first investigate identifying the relationships among social network users based on certain social network property and limited pre-known information. Social networks have been widely used for online marketing. A critical step is the propagation maximization by choosing a small set of seeds for marketing. Based on the social relationships learned in the first step, we show how to exploit these relationships to maximize the marketing efficacy. We evaluate our approach on large scale real-world data from Renren network, showing that the performances of our relationship classification and propagation maximization algorithm are pretty good in practice.

关键词： Social network services Labeling Communities Games Educational institutions software Accuracy

来源：评论

学校读者我要写书评

暂无评论

Strong Barrier Coverage Using Directional Sensors with Arbitrarily Tunable Orientations

Strong Barrier Coverage Using Directional Sensors with Arbit...

引用

International Conference on Mobile Ad-hoc and Sensor Networks, MSN

作者： Dan Tao Xu-Fei Mao Shao-Jie Tang Hai-Tao Zhang Hua-Dong Ma Hai-Jiang Xie School of Electronic and Information Engineering Beijing Jiaotong University Beijing China Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia Beijing University슠of Posts and슠Telecommunications Beijing China Department of Computer Science Illinois Institute of Technology Chicago IL USA Department of Computer Science and Technology XiAn JiaoTong University XiAn China

Barrier coverage is an important problem for sensor networks to fulfill some given sensing tasks. Barrier coverage guarantees the detection of events happened crossing a barrier of sensors. In majority study of barrier coverage using sensor networks, sensors are assumed to have an isotropic sensing model. However, in many applications such as monitoring an area using video camera, the sensors have directional sensing model. In this paper, we investigate strong barrier coverage using directional sensors, where sensors have arbitrarily tunable orientations to provide good coverage. We investigate the problem of finding appropriate orientations of directional sensors such that they can provide strong barrier coverage. By exploiting geographical relations among directional sensors and deployment region boundaries, we first introduce the concept of virtual node to reduce the solution space from continuous domain to discrete domain. We then construct a directional barrier graph (DBG) to model this barrier coverage question such that we can quickly answer whether there are directional sensors' orientations that can provide strong barrier coverage over a given belt region. If the belt region is strong barrier covered, we then develop energy-efficient solutions to find strong barrier path(s) that will approximately minimize the total or the maximum rotation angles of all directional sensors. Extensive simulations are conducted to verify the effectiveness of our solution.

关键词： Sensors Belts Clocks Numerical models Educational institutions Cameras Complexity theory

来源：评论

学校读者我要写书评

暂无评论

Active Collision Avoidance Maneuver Design Under Constant Thrust ⋆

引用

IFAC Proceedings Volumes 2011年第1期44卷 9887-9892页

作者： Yongqiang Qi Yingmin Jia Junping Du Fashan Yu The Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Key Laboratory of Mathematics Informatics and Behavioral Semantics (LMIB) Ministry of Education SMSS Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

Abstract In this paper, the relative position parameters of the target spacecraft are obtained by using the vision measurement and the target maneuver positions are calculated through the isochronous interpolation method. Furthermore, new switch control laws under constant thrust are designed for active collision avoidance maneuver of the chaser along a specified trajectory. The switch control laws are obtained based on the acceleration sequences and the working times of thrusters in three axes which can be respectively computed by the time series analysis method. The perturbations and fuel consumptions are addressed during the computation of the working times. The simulation results show that the constant thrust maneuver can effectively guarantee the chaser maneuvering along the specified trajectory.

关键词： Active collision avoidance maneuver Collision possibility Constant thrust Switch control laws

来源：评论

学校读者我要写书评

暂无评论

Risk-Sensitive Cubature Filtering for Jump Markov Nonlinear Systems and Its Application to Land Vehicle Positioning ⋆

引用

IFAC Proceedings Volumes 2011年第1期44卷 20-25页

作者： Wenling Li Yingmin Jia Junping Du Fashan Yu The Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Key Laboratory of Mathematics Informatics and Behavioral Semantics (LMIB) Ministry of Education SMSS Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

Abstract In this paper, a risk-sensitive filter for a class of jump Markov nonlinear systems is proposed. By using a set of weighted cubature points to approximate the intractable risk-sensitive recursions, the proposed filter could exhibit improved numerical stability with respect to the derivation of the square-root covariance, for which the unscented transform technique might halt the operations due to the presence of non-positive definite covariance. The performance of the proposed filter is illustrated through a simulation study of tracking a land vehicle with maneuvers.

关键词： Markov models Kalman filters estimation theory target tracking

来源：评论

学校读者我要写书评

暂无评论

Method for identify service providers of user privacy information disclosure

引用

Tongxin Xuebao/Journal on Communications 2011年第9 A期32卷 238-245页

作者： Gao, Feng He, Jing-Sha Zhang, Feng College of Computer Science and Technology Beijing University of Technology Beijing 100124 China School of Software Engineering Beijing University of Technology Beijing 100124 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications Beijing 100876 China

By research on the privacy disclosure issue in cloud computing, a method for identify privacy disclosure service providers was proposed. Firstly, an optional signature process and a resistant attack method were introduced. Then an analysis center with text classification and service classification based analysis algorithm also with testing method was present to identify the privacy disclosure service providers. Analyze and simulation results show the method can identify privacy disclosure service providers well.

关键词： Cloud computing

来源：评论

学校读者我要写书评

暂无评论

Trust based privacy protection method in LBS

引用

Tongxin Xuebao/Journal on Communications 2011年第11 A期32卷 63-70页

作者： Gao, Feng He, Jing-Sha Zhang, Feng Zhang, Yu-Qiang College of Computer Science and Technology Beijing University of Technology Beijing 100124 China School of Software Engineering Beijing University of Technology Beijing 100124 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications Beijing 100876 China

For the multiple privacy protection demands in Locations Based Services (LBS), a user-centric trust based privacy protection model was proposed. In the model, user can set their privacy preference freely. The model uses a method base that integrates kinds of privacy protection methods to protect privacy. According to the trustworthy of network environment, the trustworthy of location, the trustworthy of surrounding users and the trustworthy of service providers, a method which meet diverse privacy protection requirements was chosen from the method base on the basis of the mapping relationship between trust and privacy protection method. Analysis and simulations results show the model can effectively protect privacy also with high quality of service.

关键词： Location based services

来源：评论

学校读者我要写书评

暂无评论

Semantic image classification of a Relief-F feature weighting based SVM method for performance

引用

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and technology) 2011年第SUPPL. 1期42卷 750-754页

作者： Liu, Jie Du, Jun-Ping Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia School of Computer Science Beijing University of Posts and Telecommunications Beijing 100876 China

A Relief-F feature weighting based support vector machine (SVM) method for semantic image classification was proposed. Firstly, the feature weight of images in training data set was computed by the Relief-F algorithm;Then, the SVM classifier was trained by taking advantage of the feature vector with different weights;Finally, the automatic classification of images in the test data set was presented by using trained SVM classifier. Experimental results show that the Relief-F feature weighting based SVM classifier is better than the traditional SVM classifier both in classification accuracy and training time-consuming in semantic image classification.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

Unconventional emergency modeling based on scenario and ontology

引用

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and technology) 2011年第SUPPL. 1期42卷 835-840页

作者： Wang, Su Du, Jun-Ping Gao, Tian Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia School of Computer Science Beijing University of Posts and Telecommunications Beijing 100876 China

With the characteristics of sudden outbreak and inadequate precursors of unconventional emergency, the traditional emergency disposal systems based on data model can hardly reponse to the undefined and unexpected situation quickly. The three layers model of scenario-ontology-data schema mapping was proposed. By using the mapping model, the scenarioe sets can be built agilely to describe the new unconventional emergency type, the scenarioes and factual event data are linked and the unconventional emergencies will be reponsed and disposed effectively. And the method of scenario-based analysis, combined with multi-agent technology, was used to design and implement the multi-agent system of unconventional emergency modeling.

关键词： Ontology

来源：评论

学校读者我要写书评

暂无评论

STUDY ON FOOD SAFETY ONTOLOGY REASONING APPLICATION BASED ON JENA

STUDY ON FOOD SAFETY ONTOLOGY REASONING APPLICATION BASED ON...

引用

2011 International Conference on Communications technology and Applications(2011年通信技术与应用国际会议 ICCTA 2011)

作者： Yuehua Yang Juan Hu Junping Du Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia School of Computer S Department of Information and Technology Beijing College of Politics and Law Beijing 100024 China

ISBN: (纸本)9781618399267

This study constructs a food safety ontology which adopts OWL (Web Ontology Language) to represent food safety knowledge in a structural way in order to help knowledge requesters clearly understand food safety knowledge;subsequently designs some ontology reasoning rules for deducing food safety knowledge in order to share and reuse relevant food safety knowledge effectively;finally implement an ontology-based food safety knowledge reasoning mechanism. Results of this study facilitate the food safety knowledge storage, management and sharing to provide knowledge requesters with accurate and comprehensive food safety knowledge for problem solving and decision support.

关键词： food safety ontology Jena reasoning rules

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：