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检索条件"机构=Key Lab of Network and Intelligent Information Processing"

共 2070 条记录，以下是2001-2010 订阅

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An authorization mechanism for resource space model

An authorization mechanism for resource space model

引用

3rd International Conference on Semantics, Knowledge, and Grid, SKG 2007

作者： Zhu, Yuan Xing, Yunpeng 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 Computing Technology Chinese Academy of Sciences 100080 Beijing China

ISBN: (纸本)0769530079

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. © 2007 IEEE.

关键词： Authorization

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Cluster-based Double Bounce MIMO Channel Model and Capacity Analysis*

Cluster-based Double Bounce MIMO Channel Model and Capacity ...

引用

第三届IEEE无线通讯、网络技术暨移动计算国际会议

作者： Yonghua Li Zhiqiang He Kai Niu Jiaru Lin Weiling Wu Key Lab of Information Processing and Intelligent Technology Beijing University of Posts and Telecommunications Beijing 100876 China

The spatial and temporal correlation is investigated at both transmitter and receiver. A cluster-based double bounce MIMO channel model is presented. The model can be used for nonselective Rice fading MIMO channels, and the expressions for correlation coefficient and channel capacity are derived. The correlation coefficient is the function of antennas spacing, angular spread, power angular spectrum, mean angle-of-arrival, Doppler spread and delay spread. In space domain, the capacity increases with antenna spacing and angular spread. For multiple clusters incidence wave, the correlation coefficient and capacity will oscillate with increasing antenna spacing. The capacity will decrease with increasing Rician factor. In time domain, the capacity gets higher with increasing Doppler and delay spread. When the frame length is larger than coherent time, the capacity will get to the independent capacity asymptotically. Two typical scenarios are simulated for indoor and outdoor environments.

关键词： MIMO Channel capacity Correlation

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WM method and its application in traffic flow modeling

引用

International Conference on Transportation Engineering 2007, ICTE 2007

作者： Chen, Dewang Zhang, Junping Jia, Shunping China School of Electronics and Information Engineering Beijing Jiaotong University 100044 Beijing China Shanghai Key Lab. of Intelligent Information Processing Department of Computer Science and Engineering Fudan University Shanghai 200433 China School of Traffic and Transportation Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9780784409329

Extracting fuzzy rules automatically from data is a research direction of fuzzy system and data mining. The WM method is the one of the earliest algorithms. However, it only selects the rules which have the maximal degree, so it does not consider other conflicting rules. Two other methods are presented in this paper to select fuzzy rules, and one simulation data and one field traffic flow data are used to compare all three methods. The comparative results show that the weighted mean method has the best robustness and error-tolerance, which is more suitable for extracting rules from the real data with noise. Copyright ASCE 2007.

关键词： Traffic congestion

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Spectral clustering based null space linear discriminant analysis (SNLDA)

Spectral clustering based null space linear discriminant ana...

引用

11th Pacific-Asia Conference on Knowledge Discovery and Data Mining, PAKDD 2007

作者： Wenxin, Yang Junping, Zhang Department of Electronic Engineering Fudan University Shanghai 200433 China Shanghai Key Lab. of Intelligent Information Processing Department of Computer Science and Engineering Fudan University Shanghai 200433 China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University China

ISBN: (纸本)9783540717003

While null space based linear discriminant analysis (NLDA) obtains a good discriminant performance, the ability easily suffers from an implicit assumption of Gaussian model with same covariance each class. Meanwhile, mixture model discriminant analysis, which is a good way for processing issues on multiple subclasses in each class, depends on human experience on the number of subclasses and has a highly complex iterative process. Considering the cons and pros of the two mentioned approaches, we therefore propose a new algorithm, called Spectral clustering based Null space Linear Discriminant Analysis (SNLDA). The main contributions of the algorithm include the following three aspects: 1) Employing a new spectral clustering method which can automatically detect the number of clusters in each class. 2) Finding a unified null space for processing multi-subclasses issues with eigen-solution technique. 3) Refining the calculation of the covariance matrix in a single sample subclass. The experimental results show the promising of the proposed SNLDA algorithm. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Clustering algorithms

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A flexible stem-based local search algorithm for predicting RNA secondary structures including pseudoknots

A flexible stem-based local search algorithm for predicting ...

引用

7th IEEE International Conference on Bioinformatics and Bioengineering, BIBE

作者： Chen, Xiang He, Si-Min Bu, Dong-Bo Chen, Run-Sheng Gao, Wen Key Lab. of Intelligent Information Processing Chinese Academy of Sciences Beijing 100080 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Insitute of Biophysics Chinese Academy of Sciences Beijing 100101 China Graduate University Chinese Academy of Sciences Beijing 100039 China

ISBN: (纸本)1424415098

We demonstrate a new algorithm named FlexStem to predict RNA secondary structures with pseudoknots. Our approach is based on the free energy minimization criterion, and utilizes a sophisticated energy model that is more accurate and supports more types of pseudoknots. By using a "maximal stem" and "stem merging" strategy, the search space for RNA structure prediction is significantly reduced. We have also developed a greedy search algorithm with perturbation on stems. The FlexStem algorithm is applied to a large number of sequences taken from Sprinzl, Pseudobase and other reliable resource. We find that FlexStem outperforms the well-known optimal and heuristic algorithms such as Mfold, PKNOTS, HotKnots and ILM in overall sensitivity and has comparable results to those algorithms in overall specificity. Performance evaluation demonstrate that FlexStem requires significantly less time than the optimal algorithm PKNOTS. In addition, our algorithm has better prediction results on pseudoknot-free sequences compared to competing algorithms. ©2007 IEEE.

关键词： Heuristic algorithms

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Algebra and Calculus of the Resource Space Model

Algebra and Calculus of the Resource Space Model

引用

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： Yunpeng Xing Hai Zhuge China Knowledge Grid Research Group Key Lab of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

Resource Space Model (RSM) is a semantic model to manage resources in the future interconnection environment. The query capability is an important aspect of RSM as a semantic resource management model. This paper reports the research result on the query capability of RSM from two perspectives: resource space algebra and resource space calculus. The equivalence of the resource space algebra and the resource space calculus has been discussed.

关键词： Algebra Calculus Resource management Space technology Environmental management Ontologies Database languages information processing Computers Conference management

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An Authorization Mechanism for Resource Space Model

An Authorization Mechanism for Resource Space Model

引用

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

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

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AN IKONOS IMAGE FUSION PROCESS USING SUPPORT VALUE TRANSFORM

AN IKONOS IMAGE FUSION PROCESS USING SUPPORT VALUE TRANSFORM

引用

2007 International Conference on Machine Learning and Cybernetics(IEEE第六届机器学习与控制论国际会议)

作者： SHENG ZHENG WENZHONG SHI JIAN LIU Institute of Intelligent Vision and Image Information Best College of Electrical Engineering and In Advanced Research Center for Spatial Information Technology Department of Land Surveying and Geo-In State Education Commission Key Lab for Image Processing and Intelligent Control HUST Wuhan 430074

Panchromatic (Pan)-sharpening of multispectral (MS) bands is an important technique in various applications of satellite remote *** this paper, we apply the support value transform (SVT) to Ikonos image *** fused saliency features are represented by support values and extracted by *** low-resolution MS bands are resampled to the fine scale of the Pan image and sharpened by injecting the detailed features extracted from the high-resolution Pan *** fusing results on Ikonos MS + Pan data demonstrate that the proposed image fusion method is effective and efficient.

关键词： Mapped least squares support vector machine (mapped LS-SVM) support value transform (SVT) Ikonos Image fusion

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Stable PD and Internal Force Control of Omnidirectional Wheeled Mobile Manipulators

Stable PD and Internal Force Control of Omnidirectional Whee...

引用

IEEE International Conference on Mechatronics and Automation

作者： Dong Xu Dongbin Zhao Jianqiang Yi Xuyue Deng Guosheng Yang Key Lab of Complex Systems and Intelligence Science Institute of Automation Chinese Academy and Sciences Beijing China Institute of Advanced Control and Intelligent Information Processing College of Computer and Information Engineering Henan University Kaifeng China

Omnidirectional mobile manipulator, which is composed by a three DOF omnidirectional mobile platform and a mounted manipulator, can move in any direction at any time. By reason of the redundantly actuated mechanism, the omnidirectional motion property of the mobile platform is similar to the parallel manipulator cooperatively manipulating objects, which admits internal force doing none contribution to the motion of the platform. Thus, the internal force should be controlled to reduce energy waste. Therefore, a stable PD controller is developed first for motion control of the integrated mobile manipulator system. Then, by treating the motion induced force as disturbance, a feed forward plus PI type force controller is addressed to regulate the internal force to zero. Finally, simulation results demonstrate the validity of the proposed approach.

关键词： Force control Motion control Wheels Kinematics Manipulator dynamics Automation Control systems intelligent actuators Centralized control Mechatronics

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EDGE DETECTION USING SUPPORT VALUE TRANSFROM

EDGE DETECTION USING SUPPORT VALUE TRANSFROM

引用

2007 International Conference on Machine Learning and Cybernetics(IEEE第六届机器学习与控制论国际会议)

作者： SHENG ZHENG JINWEN TIAN JIAN LIU Electronics and Information Engineering Department Huazhong University of Science and Technology W State Education Commission Key Lab for Image Processing and Intelligent Control HUST Wuhan 430074 Electronics and Information Engineering Department Huazhong University of Science and Technology W

An innovative edge detection algorithm using the support value transform is presented in this *** on the support value transform, the multi scale support value images are extracted from the *** resolution of an image is directly related to the proper scale for edge detection, and the second level support value image is used to locate the edge positions by their zero *** experiments are carried out and sharp image edges are obtained from a variety of sample *** with many other existing methods, including LoG and Canny detectors, the proposed algorithm is superior to the LOG and Roberts approach.

关键词： Edge detection mapped least squares support vector machine (mapped LS-SVM) support value transform (SVT) zero crossings

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