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A Hierarchical Image Annotation Method Based on SVM and Semi-supervised EM

自动化学报 2010年第7期36卷 960-967页

作者： GAO Yan-Yu YIN Yi-Xin UOZUMI Takashi School of Information Engineering University of Science and Technology Beijing Beijing 100083 P.R.China Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology Beijing Beijing 100083 P. R. China Department of Computer Science and Systems Engineering Muroran Institute of Technology Muroran 050- 8585 Japan

Automatic image annotation, which aims at automatically identifying and then assigning semantic keywords to the meaningful objects in a digital image, is not a very difficult task for human but has been regarded as a difficult and challenging problem to machines. In this paper, we present a hierarchical annotation scheme considering that generally human s visual identification to a scenery object is a rough-to-fine hierarchical process. First, the input image is segmented into multiple regions and each segmented region is roughly labeled with a general keyword using the multi-classification support vector machine. Since the results of rough annotation affect fine annotation directly, we construct the statistical contextual relationship to revise the improper labels and improve the accuracy of rough annotation. To obtain reasonable fine annotation for those roughly classified regions, we propose an active semi-supervised expectation-maximization algorithm, which can not only find the representative pattern of each fine class but also classify the roughly labeled regions into corresponded fine classes. Finally, the contextual relationship is applied again to revise the improper fine labels. To illustrate the effectiveness of the presented approaches, a prototype image annotation system is developed, the preliminary results of which showed that the hierarchical annotation scheme is effective.

关键词：数字图像自动化系统准确性意义图像标注

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Efficient hash chain traversal based on binary tree inorder traversal

Efficient hash chain traversal based on binary tree inorder ...

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2010 2nd Pacific-Asia Conference on Circuits, Communications and system, PACCS 2010

作者： Fu, Jian-Qing Wu, Chun-Ming Wu, Ji-Yi Fan, Rong Ping, Ling-Di College of Computer Science and Technology ZheJiang University Hangzhou 310027 China Key Laboratory of Electronic Commerce and Information Security Hangzhou Normal University Hangzhou 310036 China

ISBN: (纸本)9781424479689

This paper presents an algorithm to improve the time and spacc complexity of reverse hash chain traversal. Mapping the traversing of a reverse hash chain to the inorder traversing of a binary tree, the proposed algorithm chooses auxiliary nodes saved by stack dynamically with the help of the binomial tree model, and achieves low time and spacc complexity for the traversing of a reverse hash chain with any length. Analyzing the time and spacc complexity with the help of the binomial tree model, the result shows that the proposed algorithm requires only [log2n] / 2 hash operations per chain link traversal and [log2n] +1 chain links to be save at the same time, where n is the length of the reverse hash chain. Compared to other algorithms, our algorithm can be applied to hash chain with any length without the limitation that the length must be of 2 integer-th power, and the proof is more exact. © 2010 IEEE.

关键词： Binary trees

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Availability based trust model of clusters for MANET

Availability based trust model of clusters for MANET

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International Conference on Services systems and Services Management, ICSSSM

作者： Xibin Zhao Zhiyang You Zhifeng Zhao Danning Chen Feng Peng Key Laboratory of Information System Security of Ministry of Education School of Software Tsinghua University China Department of Computer Science and Technology Tsinghua University China Zhenjiang Watercraft College Department of Computer Science Zhenjiang Watercraft College China School of Software Tsinghua University China China Minzu Securities Company Limited China

MANET (Mobile ad hoc network) is vulnerable to security attack due to its characteristics such as open network environment, lack of centralized control, dynamic topology, and so on, while traditional security mechanisms cannot meet the security requirements of MANET due to the limited communication bandwidth, computation power, memory and battery capacity, and dynamic deployment environment. Many approaches have been suggested to trade-off between the security strength and efficiency, and most of them focus on the confidentiality and integrity of MANET while pay less attention to the availability issue. Based on the analysis of availability related factors in MANET, we present an availability based trust model in this paper. Furthermore, a cluster based trust model (ABTMC, Availability Based Trust Model of Clusters) is presented with the consideration with the resource constrain of node, dynamic topology, and the unbalance of computing capability and resource capability among MANET nodes. Many availability oriented security service can be obtained based on this model.

关键词： Mobile ad hoc networks Availability computer security Communication system security information security Communication system software computer science Network topology Environmental management Proposals

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Investigation of the relation between acoustic features and articulation — An application to emotional speech analysis

Investigation of the relation between acoustic features and ...

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International Symposium on Chinese Spoken Language Processing

作者： Yongxin Wang Jianwu Dang Lianhong Cai School of Information Science Japan Advanced Institute of Science and Technology Ishikawa Japan State Key Laboratory on Intelligent Technology and Systems Tsinghua National Laboratory of Information Science and Technology(TNList) Department of Computer Science and Technology Tsinghua University Beijing China School of Computer Science and Technology Tianjin University TJU Tianjin China

In speech communication, humans are able to perceive not only the acoustic features but also the articulation state from speech sounds. Some specific articulation configurations can carry certain non-linguistic information such as emotion. However, the relation between articulation and acoustic features is still not clear. To clarify such a relation, we analyzed speech data from the emotions of cold anger and hot anger based on an emotional speech corpus and attempt to realize the observations using a physiological articulatory model. We measured the changes in acoustic features when altering articulation states for individual speech organs using the physiological articulatory model. It is found that the cold and hot angers both have emphasized components in high-frequency region, while the former controls articulation and the latter controls the sound source of the speech production system.

关键词： Speech Acoustics Bandwidth Analytical models Feature extraction Data models Resonant frequency

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A privacy-preserving mutual authentication protocol for vehicle Ad Hoc networks

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Journal of Convergence information technology 2010年第7期5卷 24-24页

作者： Tan, Zuowen Department of Computer Science and Technology School of Information Technology Jiangxi University of Finance and Economics Nanchang 330032 Jiangxi Province China Key Lab of Network Security and Cryptology School of Mathematics and Computer Science Fujian Normal University Fuzhou 350007 Fujian Province China

Recently, Jung et al. proposed a robust conditional privacy-preserving authentication protocol in vehicle ad-hoc networks. However, Jung et al.'s authentication protocol cannot provide unlinkage and mutual authentication during the communications between the vehicles and the road-side infrastructure units. In this paper, we propose an improved privacy-preserving mutual authentication protocol for vehicle ad hoc networks by using secure identity-based group blind signature, the private encryption system and the public encryption system. The proposed privacy-preserving mutual authentication protocol for vehicle ad-hoc networks satisfies mutual authentication, anonymity and unlinkability under Random Oracle Model and the Decisional Bilinear Diffie-Hellman (DBDH) assumption. In addition, the trusted center can trace malicious on-board units or road-Side infrastructure units in our protocol.

关键词： Vehicles

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An associative memory system for incremental learning and temporal sequence

An associative memory system for incremental learning and te...

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2010 6th IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 International Joint Conference on Neural Networks, IJCNN 2010

作者： Shen, Furao Yu, Hui Kasai, Wataru Hasegawa, Osamu State Key Laboratory for Novel Software Technology Jiangyin Information Technology Research Institute Nanjing University Nanjing 210093 China Department of Computer Intelligence and Systems Science Tokyo Institute of Technology Yokohama 226-8503 Japan Imaging Science and Engineering Lab. Tokyo Institute of Technology R2-52 4259 Nagatsuda Midori-ku Yokohama 226-8503 Japan

ISBN: (纸本)9781424469178

An associative memory (AM) system is proposed to realize incremental learning and temporal sequence learning. The proposed system is constructed with three layer networks: The input layer inputs key vectors, response vectors, and the associative relation between vectors. The memory layer stores input vectors incrementally to corresponding classes. The associative layer builds associative relations between classes. The proposed method can incrementally learn key vectors and response vectors;store and recall both static information and temporal sequence information;and recall information from incomplete or noise-polluted inputs. Experiments using binary data, real-value data, and temporal sequences show that the proposed method works well. © 2010 IEEE.

关键词： Vectors

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Analyzing Real-time Schedulability of Resource-oriented Distributed Real-time Embedded Software

Analyzing Real-time Schedulability of Resource-oriented Dist...

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2010 2nd IEEE International Conference on information Management and Engineering(2010年IEEE第二届信息管理与工程国际会议 IEEE ICIME 2010)

作者： Liqiong Chen Yunxiang Liu Guisheng Fan Department of Computer Science and Information EngineeringShanghai Institute of Technology Shanghai Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China Departme

As computer systems become increasingly internetworked, Distributed Realtime Embedded (DRE) software is becoming increasingly common and important, a challenging problem faced by researchers and developers of DRE software is how to devise and implement a method that can effectively analyze requirements in varying operational conditions. In this paper, a Distributed Realtime Embedded net (DREN) is proposed as software design specification modeling tool. The basic tasks, function module and communication process are modeled by using DREN, thus forming the entire application by making use of Petri net’s synthesis operation. Time Reachability Graph is adopted to analyze the correctness of DRENmodel, the basic properties of DRE system are also considered. Finally, a specific example is given to simulate the analytical process, the results show that the method can be a good solution to analyze DRE software.

关键词： Embedded software Real time systems Distributed computing Embedded computing information analysis computer science Application software Processor scheduling Laboratories Software testing

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Reduction Criteria for Probabilistic Models with Spatial Restrictions on States

Reduction Criteria for Probabilistic Models with Spatial Res...

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International Conference on Networks security, Wireless Communications and Trusted Computing, NSWCTC

作者： Niu Jun Guosun Zeng Embedded System and Service Computing Key Laboratory Ministry of Education Shanghai China College of Information Engineering Zhejiang Business and Technology Institute Ningbo China Department of Computer Science and Technology University of Tongji Shanghai China

ISBN: (纸本)9781424465972;9780769540115

Partial order reduction techniques have been used to combat the state explosion problem in model checking procedures for concurrent systems with probabilistic behaviors. There are some results that give criteria on applying partial order reduction for verifying quantitative time properties and reward-based properties on actions. However, there are many situations that reward-based properties are expressed on states rather than on actions because actions are triggered in no time and the quantities can not be obtained easily. This paper presents reduction criteria for a probabilistic temporal logic that allows specification of restrictions on quantitative measures given by spatial resources function for the states of the considered system and provides the proof of the correctness.

关键词： Explosions computer networks Concurrent computing Embedded computing Educational technology Probabilistic logic Communication system security computer security information security Wireless communication

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A Generalized Model with Spatial Resources Labels

A Generalized Model with Spatial Resources Labels

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International Conference on Biomedical Engineering and computer science (ICBECS)

This paper proposes a generalized model by extending Markov chain with spatial resources labels, which can describe the functional and performance properties and some basic characteristics such as nondeterminacy and randomicity. The syntax and semantics of the new model are shown based on the existing temporal logics such as CSRL and pathCSRL. The model checking procedure is discussed and thus the practicability of the new model is intuitive. Based on the existing models, the proposed model includes spatial resources labels only by adding the spatial information to the existing labels of states, so the treatment of the state explosion problem is similar to that in the existing models.

关键词： Educational technology Paper technology Logic Labeling Educational institutions Embedded system Embedded computing computer science education systems engineering education computer science

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Hybrid state space and echo state networks model of a miniature helicopter

Hybrid state space and echo state networks model of a miniat...

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作者： Tan, Li Song, Yixu Jia, Peifa State Key Laboratory of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Department of Computer Science and Technology Tsinghua University Beijing 100084 China

ISBN: (纸本)9787894631046

To solve the problem of modeling the horizontal translational motion of a Raptor 30 based miniature helicopter near hovering, a black-box model is built based on echo state networks. Combined with a state space angular motion model, a four-degree-of-freedom hybrid model is created. system identification is done using the remote control experiment data. Model validation results demonstrate that the model can predict the motion of the miniature helicopter near hovering on the whole. The model can be used to optimize parameterized controller. Closed-loop simulation further validates the model.

关键词： Remote control

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