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International Conference on Semantic computing

作者： Juan Cao Jintao Li Yongdong Zhang Sheng Tang Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China Graduate University of the Chinese Academy of Sciences Beijing China

Topic-based language model has attracted much attention as the propounding of semantic retrieval in recent years. Especially for the ASR text with errors, the topic representation is more reasonable than the exact term representation. Among these models, Latent Dirichlet Allocation(LDA) has been noted for its ability to discover the latent topic structure, and is broadly applied in many text-related tasks. But up to now its application in information retrieval(IR) is still limited to be a supplement to the standard document models, and furthermore, it has been pointed out that directly employing the basic LDA model will hurt retrieval performance. In this paper, we propose a lexicon-guided two-level LDA retrieval framework. It uses the HowNet to guide the first-level LDA model's parameter estimation, and further construct the second-level LDA models based on the first-level's inference results. We use TRECID 2005 ASR collection to evaluate it, and compare it with the vector space model(VSM) and latent semantic Indexing(LSI). Our experiments show the proposed method is very competitive.

关键词： Linear discriminant analysis Automatic speech recognition information retrieval Large scale integration Space technology Videoconference lab.ratories information processing Computers Natural languages

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Adaptive Spatial and Transform Domain FGS Coding

Adaptive Spatial and Transform Domain FGS Coding

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2007 IEEE International Conference on Multimedia and Expo (ICME 2007), vol.3

作者： Li Zhang Xiangyang Ji Wen Gao Debin Zhao Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China Key Laboratory of Intelligent Information Processing Chinese Academy of Sciences Beijing China Peking University Beijing China Graduate School of the Chinese Academy of Sciences Beijing China

In inter-picture coding, block-based frequency transform is usually carried out on the predicted errors for each inter-block to remove the spatial correlation among them. However, it can not always do well since the predicted errors in some inter-blocks have marginal or diagonal correlation. A good solution is to omit transform operations for the predicted errors of those inter-blocks with low correlation before quantization operation. The same phenomenon also can be observed in Fine Grain Scalab.lity (FGS) layer coding. In this paper, an adaptive prediction error coding method in spatial and frequency domain with lower complexity is considered for FGS layer coding. Transform operation is only needed when there are non-zero reconstructed coefficients in spatially co-located block in base layer. The experimental results show that compared with FGS coding in JSVM, higher coding efficiency can be achieved with lower computational complexity at decoder since inverse transform is no longer needed for those predicted errors coded in spatial domain at encoder.

关键词： FGS Adaptive spatial Frequency domain

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Notice of Retraction: Geometrical Issues for Representing Protein Structure

Notice of Retraction: Geometrical Issues for Representing Pr...

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International Conference on Bioinformatics and Biomedical Engineering (ICBBE)

作者： Jianhui Liu Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China Department of Basic Science Beijing University of Agriculture Beijing China

This article has been retracted by the publisher.

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3-D projective moment invariants

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Journal of information and Computational Science 2007年第2期4卷 821-828页

作者： Xu, Dong Li, Hua Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Acad. of Sci. Beijing 100080 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Acad. of Sci. Beijing 100080 China National Research Center for Intelligent Computing Systems Institute of Computing Technology Chinese Acad. of Sci. Beijing 100080 China Graduate University Chinese Acad. of Sci. Beijing 100080 China

2-D projective moment invariants were firstly proposed by Suk and Flusser in [12]. We point out here that there is a useless projective moment invariant which is equivalent to zero in their paper. 3-D projective moment invariants are generated theoretically by investigating the property of signed volume of a tetrahedron. The main part is the selection of permutation invariant cores for multiple integrals to generate independent and nonzero 3-D projective moment invariants. We give the conclusion that projective moment invariants don't exist strictly speaking because of their convergence problem.

关键词： Computer vision

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A Dynamic Description Logic Approach to Extended RBAC Model

A Dynamic Description Logic Approach to Extended RBAC Model

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International Conference on Future Generation Communication and Networking (FGCN)

作者： Li Ma Shilong Ma Yuefei Sui Department of Computer Science Beijing Aeronautics and Astronautics University Beijing China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China

ISBN: (纸本)9780769530482;0769530486

Traditional RBAC model describes a static access control policy. As the development of network application, such as Web services, access control faces many new challenges, one of which is that access control policies need to protect not only static resources but also dynamic ones that are encapsulated in a service. In order to capture the flexibility of application, we specify a fine-grained control on individual users by introducing user attributes which are associated to user's role and permission. We take the service as an action that changes some of user's attributes so as to adjust users' permission at run. In order to represent and reason on the access control automatically, we use the description logics combined with prepositional dynamic logic as a logic framework to construct a knowledge base for the access control and action rules, and semantically explain how a user's permission can be changed at runtime.

关键词： Access control Permission Aerodynamics Automatic logic units Protection Qualifications Computer science lab.ratories information processing Application software

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An Authorization Mechanism for Resource Space Model

An Authorization Mechanism for Resource Space Model

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2007年第三届语义和知识网格国际会议(Third International Conference on Semantics,Knowledge,and Grid)(SKG 2007)

作者： Yuan Zhu Yunpeng Xing Hunan Knowledge Grid Lab Hunan University of Science and Technology Hunan China China Knowledge Grid Research Group Key Lab of Intelligent Information Processing Institute of Comp

Authorization mechanism is an effective technique of access control. In this paper, we construct a multidimensional authorization space for RSM with the guidance of the methodology of RSM design. This authorization space permits both positive and negative authorizations and supports exceptions and strong enforcement as well as the temporal constraints on the authorizations. For the sake of efficiency and convenience we extend the representation of object in GRANT command.

关键词： Authorization Space technology Access control Multidimensional systems Protection Mirrors Design methodology information processing Computers Buildings

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Monocular Tracking 3D People By Gaussian Process Spatio-Temporal Variable Model

Monocular Tracking 3D People By Gaussian Process Spatio-Temp...

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IEEE International Conference on Image processing

作者： Junbiao Pang Laiyun Qing Qingming Huang Shuqiang Jiang Wen Gao Graduate School of Chinese Academy of Sciences Beijing China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China Institute of Digital Media Peking University Beijing China

Tracking 3D people from monocular video is often poorly constrained. To mitigate this problem, prior knowledge should be exploited. In this paper, the Gaussian process spatio-temporal variable model (GPSTVM), a novel dynamical system modeling method is proposed for learning human pose and motion priors. The GPSTVM provides a low dimensional embedding of human motion data, with a smooth density function that provides higher probability to the poses and motions close to the training data. The low dimensional latent space is optimized directly to retain the spatio-temporal structure of the high dimensional pose space. After the prior on human pose is learned, the particle filtering can be used tracking articulated human pose; particle filtering propagates over time in the embedding space, avoiding the curse of dimensionality. Experiments demonstrate that our approach tracks 3D people accurately.

关键词： Gaussian processes Humans Filtering Tracking Predictive models information processing Computers Data models Modeling Density functional theory

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Agent Grid Based Enterprise Application Integration

Agent Grid Based Enterprise Application Integration

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International Conference on Natural Computation (ICNC)

作者： Maoguang Wang Zhongzhi Shi Li Zheng Fen Lin Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China School of Computer Science and Technology China University of Mining and Technology Xuzhou China Key Laboratory of Intelligent Information Processing Chinese Academy of Sciences Beijing China Chinese Academy of Sciences China Graduate University of CAS China

Due to the increasing software complexity, how to integrate the legacy data resources and systems is a big challenge for the enterprise. This paper makes full use of agent technologies to establish an agent grid intelligent platform for enterprise heterogeneous system integration. The agent grid intelligent platform adopts a hierarchical integration model and middleware to provide efficient integration capability for different application systems. Finally, this paper introduces the grid based city emergency interaction system to illustrate the AGrIP practical system integration.

关键词： intelligent agent Application software Middleware Collab.rative work Collab.ration Connectors Computer science lab.ratories information processing Cities and towns

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Measuring Learning Difficulty Level by Comparing Ontologies

Measuring Learning Difficulty Level by Comparing Ontologies

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Dehai Zhang Yao Zhu The School of Software Yunnan University Kunming China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China Chinese Academy of Sciences Graduate University Beijing China

It is a common practice that learners (human beings or intelligent agent) estimate the difficulty level of their learning tasks. In this paper, we present an ontology comparison based method to measure the difficulty level by comparing target knowledge the learner wants to learn and the knowledge the learner already has. Our method proposes a set of measures that compare the differences of ontologies from two perspectives, the structural and the conceptual. Based on the result of comparing two ontologies, we defined the learning difficulty formally, and gave an algorithm to compute it.

关键词： Ontologies intelligent agent Humans Birds lab.ratories information processing Computers Knowledge representation Software measurement Electronic learning

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Distributed Application Integration Based on Agent Grid intelligent Platform

Distributed Application Integration Based on Agent Grid Inte...

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International Conference on Innovative computing, information and Control (ICICIC)

作者： Maoguang Wang Zhongzhi Shi Jiewen Luo Li Zeng Graduate School of Chinese Academy of Sciences Beijing China School of Computer Science and Technology China University of Mining and Technology Xuzhou China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China

Due to the existence of a large amount of legacy information systems, how to obtain the information and integrate the legacy systems is becoming more and more concerned. This paper introduces the integration pattern based on agent grid. And we propose an agent grid intelligent platform called AGrIP, which can erase information islands and integrate external systems efficiently by encapsulating the distributed application system to agents. AGrIP adopts distributed hierarchical structure, which is capable of integrating external systems to provide the users various services dynamically. AGrIP has proved itself scalab.e and efficient during the industry projects development and application.

关键词： intelligent agent Application software Collab.ration information systems Software libraries Connectors Computer science lab.ratories information processing Testing

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