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Journal of Software 2013年第3期8卷 639-644页

作者： Pei, Tingrui Xie, Da Li, Zhetao Tu, Dengbiao Choi, Youngjune College of Information Engineering Xiangtan University Xiangtan 411105 China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan 411105 China School of Computer National University of Defense Technology Changsha 410073 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China Department of Information and Computer Engineering Ajou University Suwon 443749 Korea Republic of

A heterogeneous-aware cooperative MIMO transmission scheme (HAMS) is proposed to optimize the network lifetime and save energy for energy heterogeneous wireless sensor networks (WSN). This scheme extends the traditional low-energy adaptive clustering hierarchy (LEACH) protocol to enable the cooperative MIMO transmission between the sink and clusters. Through the adaptive selection of cooperative nodes and the cooperative MIMO transmission, HAMS can gain effective performance improvement in terms of taking advantage of the presence of node heterogeneity. Based on the energy consumption model developed in this paper, the optimal parameter to minimize the overall energy consumption is found. Simulation results exhibit that HAMS can effectively save energy and prolong the network time. Furthermore, HAMS displays more resilient in different degree of heterogeneous wireless sensor networks. © 2013 ACADEMY PUBLISHER.

关键词： Energy utilization

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Weight selection and PSO based three-dimensional localization for wireless sensor networks

Weight selection and PSO based three-dimensional localizatio...

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2nd International Conference on Mechanical Engineering, Industrial Electronics and Informatization, MEIEI 2013

作者： Lv, Jia Liang Wang, Ying Long Cui, Huan Qing Wei, Nuo College of Information Science and Engineering Shandong University of Science and Technology 266590 China Shandong Computer Science Center 250014 China Shandong Provincial Key Laboratory of Computer Network 250014 China

ISBN: (纸本)9783037858905

Localization is one of the key technologies of wireless sensor networks, and the problem of localization is always formulated as an optimization problem. Particle swarm optimization (PSO) is easy to implement and requires moderate computing resources, which is feasible for localization of sensor networks. To improve the efficiency and precision of PSO-based localization methods, this paper proposes a novel three-dimensional PSO method based on weight selection (WSPSO). Simulation results show that the proposed method outperforms standard PSO and existing localization algorithms. © (2013) Trans Tech Publications, Switzerland.

关键词： Wireless sensor networks

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Model for Software Behaviour Detection Based on Process Algebra and System Call

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China Communications 2013年第11期10卷 24-36页

作者：申利民王涛马川 College of Information Science and Engineering Yanshan University The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Hebei Normal University of Science and Technology

Behaviour detection models based on automata have been studied widely. By add- ing edge ε, the local automata are combined into global automata to describe and detect soft- ware behaviour. However, these methods in- troduce nondeterminacy, leading to models that are imprecise or inefficient. We present a model of software Behaviour Detection based on Process Algebra and system call （BDPA）. In this model, a system call is mapped into an action, and a function is mapped into a process We construct a process expression for each function to describe its behaviour. Without con- strutting automata or introducing nondeter- minacy, we use algebraic properties and algo- rithms to obtain a global process expression by combining the process expressions derived from each function. Behaviour detection rules and methods based on BDPA are determined by equivalence theory. Experiments demon- strate that the BDPA model has better preci- sion and efficiency than traditional methods.

关键词： intrusion detection software be-haviour model static analysis process algebra system call

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An efficient collision detection algorithm of convex polygons based on Minkowski sum

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ICIC Express Letters 2013年第2期7卷 461-464页

作者： Geng, Qingjia Guo, Xijuan Zhang, Jianfei Zhang, Buying The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province College of Information Science and Engineering Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China College of Computer Hebei Normal University of Science and Technology No. 360 West Hebei St. Qinhuangdao 066004 China

Collision detection is a hot research topic in the field of path planning of mobile robot, virtual assembly simulation, and so on. Fast and accurate collision detection has become one of the most key technologies of restricting their development. The study method based on Minkowski sum is an effective method for accurate collision detection through accurate numerical calculations. This paper presents a new efficient collision detection algorithm of convex polygons based on Minkowski sum, which uses the minimum separation distance to detect whether two convex polygons collide or not. The algorithm's performance is also analyzed and verified by experiment in the paper. Compared with the traditional collision detection algorithms based on the Minkowski sum, the algorithm's calculation is simpler and execution performance is higher. © 2013 ISSN 1881-803X.

关键词： Motion planning

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Joint optimization toward effective and efficient image search

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IEEE Transactions on Cybernetics 2013年第6期43卷 2216-2227页

作者： Wei, Shikui Xu, Dong Li, Xuelong Zhao, Yao Institute of Information Science Beijing Jiaotong University Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing 100044 China School of Computer Engineering Nanyang Technological University 639798 Singapore Singapore Center for OPTical IMagery Analysis and Learning State Key Laboratory of Transient Optics and Photonics Xi'An Institute of Optics and Precision Mechanics Xi'an 710119 China Institute of Information Science Beijing Jiaotong University Beijing 100044 China State Key Laboratory of Rail Traffic Control and Safety Beijing 100044 China

The bag-of-words (BoW) model has been known as an effective method for large-scale image search and indexing. Recent work shows that the performance of the model can be further improved by using the embedding method. While different variants of the BoW model and embedding method have been developed, less effort has been made to discover their underlying working mechanism. In this paper, we systematically investigate the image search performance variation with respect to a few factors of the BoW model, and study how to employ the embedding method to further improve the image search performance. Subsequently, we summarize several observations based on the experiments on descriptor matching. To validate these observations in a real image search, we propose an effective and efficient image search scheme, in which the BoW model and embedding method are jointly optimized in terms of effectiveness and efficiency by following these observations. Our comprehensive experiments demonstrate that it is beneficial to employ these observations to develop an image search algorithm, and the proposed image search scheme outperforms state-of-the-art methods in both effectiveness and efficiency. © 2013 IEEE.

关键词： Image enhancement

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Efficient predicate encryption supporting construction of fine-grained searchable encryption

Efficient predicate encryption supporting construction of fi...

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5th IEEE International Conference on Intelligent networking and Collaborative Systems, INCoS 2013

作者： Zhang, Minqing Wang, Xu An Yang, Xiaoyuan Cai, Weiyi School of Computer Science Northwestern Polytechnical University Xi'an 710072 China Key Laboratory of Information and Network Security Engineering University of Chinese Armed Police Force China

ISBN: (纸本)9780769549880

Predicate Encryption (PE) is a new encryption paradigm which provides more sophisticated and flexible functionality. PE is sufficient for some new applications, such as fine-grained control over access to encrypted data or search on encrypted data. We present an efficient construction of predicate encryption which is IND-AH-CPA secure by employing the dual system encryption without random oracle. We clarify the relations between PE and Searchable Encryption in detail. The new notion of Public-key Encryption with Fine-grained keyword Search (PEFKS) is proposed. We prove that a IND-AH-CPA secure PE scheme implies the existence of a IND-PEFKS-CPA secure PEFKS scheme. We develop the transformation of PE-2-PEFKS and use the transformation to construct an efficient PEFKS scheme from our new PE scheme. We believe our results will be useful to guide a final good result. © 2013 IEEE.

关键词： Search engines

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Minkowski sum modeling of polyhedra based on VRML

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ICIC Express Letters 2013年第2期7卷 455-460页

作者： Zhang, Jianfei Guo, Xijuan Geng, Qingjia Information Science and Engineering College Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of HeBei Province No. 438 Hebei Ave. Qinhuangdao 066004 China Computer and Control Engineering College Qiqihar University No. 42 Wenhua Street Qiqihar 161006 China

On the basis of the introduction to basic methods of the geometry modeling based on virtual reality modeling language (VRML) and the concepts of Minkowski sum computation of polyhedra, we present a method of Minkowski sum computation and three dimensional modeling based on VRML. The method can simplify Minkowski sum computation of general polyhedra, and experimental results indicate that this method can calculate Minkowski sum of general polyhedra much faster and realize three-dimensional representation more accurately. This method can provide important technical references for Minkowski sum visualization of polyhedra. © 2013 ISSN 1881-803X.

关键词： Geometry

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Failure modes and stability of rock mass slope containing multi-weak interlayer

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Journal of Applied Sciences 2013年第21期13卷 4371-4378页

作者： Liu, Jie-Qun Chen, Lu-Wang Liu, Jin-Long Department of Computer Science and Technology Key Laboratory of Network and Intelligent Information Processing Hefei University 230601 Hefei China School of Resource and Environmental Engineering Hefei University of Technology 230009 Hefei China Department of Civil Engineering Hefei University 230601 Hefei China

The phenomena of rock mass slope with multi-weak interlayer can be found in real engineering frequently. It is worthy to study the influence of multi-weak interlayer on failure of rock mass slope. Based on the shear strength reduction finite element method stability and failure surface of rock mass slope with different parameters had been studied, the failure mechanism of rock mass slope containing multi-weak interlayer has been analyzed. It can be found that the stability of consequent rock slope decreased first and increased later with increasing of rock stratum inclination which got its minimal value at 30° of rock stratum inclination. The stability of anti-dip rock slope fluctuated with increasing of rock stratum inclination which got its maximal value at 135° of rock stratum inclination. Whether consequent rock slope or anti-dip rock slope, the stability of slope decreased witii angle of slope increased. Although the stability of rock slope reduced or weakened by multi-weak interlayer, the failure and stability is controlled by parameters of rock mass mostly. © 2013 Asian network for Scientific information.

关键词： Finite element method

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An Event-Driven Service-Oriented Architecture for the Internet of Things

An Event-Driven Service-Oriented Architecture for the Intern...

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IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Lina Lan Fei Li Bai Wang Lei Zhang Ruisheng Shi School of Network Education Beijing University of Posts and Telecommunications Beijing China Information Systems Institute Vienna University of Technology Vienna Austria Beijing University of Posts and Telecommunications Beijing Beijing CN School of Computer Beijing University of Posts and Telecommunications Beijing China Education Ministry Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and Telecommunications Beijing China

IoT (Internet of Things) bridges the physical world and information space. IoT services are environment sensitive and event-driven. The new IoT service architecture should adapt to these features. This paper analyses IoT sensing service characteristics and proposes the future services architecture. It is focused on the middleware architecture and the interface presentation technology. In the middleware layer, the traditional SOA architecture is insufficient in the real-time response and parallel process of services execution, this paper proposes that the new sensing service system based on EDSOA (Event Driven SOA) architecture to support real-time, event-driven, and active service execution. At presentation layer, this paper presents the new IoT browser features including using augmented reality technology to input and output, and realize the superposition presentation of the physical world and abstract information. Through a use case and proof-of-concept implementation-road manhole covers monitoring system - we verify the feasibility of the proposed ideas and frameworks.

关键词： Service-oriented architecture Sensors computer architecture Real-time systems Browsers Cameras

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The Intelligent Terminal Design for Integrated Substation Auxiliary System

The Intelligent Terminal Design for Integrated Substation Au...

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2013 Spring International Conference on computer Science and Engineering(CSE-S)

作者： Enliang Pang Sanfeng Zhang Yi Ji College of Software Engineering Southeast University College of Computer Science & Engineering Southeast University Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education

The integrated substation auxiliary system is a project composed by software and hardware to help operators of a substation carry daily maintain works. The intelligent terminal is the key part of the system and it provides important UI and communication functions for the user. Smart phones can achieve higher bandwidth data communication, and at the same time can carry Bluetooth communication, video call, multimedia display and other functions. Smart phone is a potential common platform, suitable for the deployment of substation integrated auxiliary system terminal. Based on the Android Smart phone platform, this paper develops intelligent client-side software for the integrated substation auxiliary system and it can realize the operation ticket control, the video call, the substation map display and other functions. This client-side software has been applied in practice, and has gained good effects.

关键词： Integrated Substation Auxiliary System Android Intelligent Terminal Substation

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