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16th International World Wide Web Conference, WWW2007

作者： Liu, Yiqun Fu, Yupeng Zhang, Min Ma, Shaoping Ru, Liyun State Key Lab. of Intelligent Technology and Systems Tsinghua University Beijin China Technology Research and Development Center Sohu Incorporation Beijing China

ISBN: (纸本)1595936548

Performance evaluation is an important issue in Web search engine researches. Traditional evaluation methods rely on much human efforts and are therefore quite time-consuming. With click-through data analysis, we proposed an automatic search engine performance evaluation method. This method generates navigational type query topics and answers automatically based on search users. querying and clicking behavior. Experimental results based on a commercial Chinese search engine's user logs show that the automatically method gets a similar evaluation result with traditional assessor-based ones.

关键词： Data reduction

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A novel reconfigurable VLSI architecture for motion estimation

A novel reconfigurable VLSI architecture for motion estimati...

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2007 7th International Conference on ASIC, ASICON 2007

作者： Cao, Wei Hou, Hui Lai, Jin Mei Mao, Zni Gang Tong, Jia Rong Min, Hao State Key Lab. of ASIC and System Fudan University Shanghai 201203 China Microelectronics Center Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)1424411327

A new reconfigurable multi-BMA VLSI architecture was proposed to select different levels of trade-off between video quality, computing complexity and power for power aware applications. The architecture can reuse the smaller blocks' SADs to calculate 41 motion vectors of a 1616 block in parallel for H.264's VBSME. TSMC 0.18um CMOS technology was adopted and the circuit's power consumption can be changed between 13.8 and 247mW with the typical algorithms. Under a clock frequency of 157Mhz, the architecture allows the real-time processing of VGA at 30fps with FS in a search range [-16, +15] at the high level. © 2007 IEEE.

关键词： Motion estimation

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Survey on estimation of distribution algorithms

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Zidonghua Xuebao/Acta Automatica Sinica 2007年第2期33卷 113-124页

作者： Zhou, Shu-De Sun, Zeng-Qi State Key Lab. of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing 100084 China

Estimation of distribution algorithms (EDAs) are a class of novel stochastic optimization algorithms, which have recently become a hot topic in field of evolutionary computation. EDAs acquire solutions by statistically learning and sampling the probability distribution of the best individuals of the population at each iteration of the algorithm. EDAs have introduced a new paradigm of evolutionary computation without using conventional evolutionary operators such as crossover and mutation. In such a way, the relationships between the variables involved in the problem domain are explicitly and effectively exploited. According to the complexity of probability models for learning the interdependencies between the variables from the selected individuals, this paper gives a review of EDAs in the order of interactions: dependency-free, bivariate dependencies, and multivariate dependencies, aiming to bring the reader into this novel filed of optimization technology. In addition, the future research directions are discussed.

关键词： Estimation

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A sensor networks based method for detecting mine methane

A sensor networks based method for detecting mine methane

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International Conference on Information Acquisition, ICIA 2007

作者： Li, Shuai Zhang, Zaochun Ma, Yiwu State Key Lab. of Transducer Technology Institute of Intelligent Machine Chinese Academy of Sciences Hefei 230031 China Department of Automation University of Science and Technology of China Hefei 230027 China

ISBN: (纸本)1424412196

This paper describes a new technique based on sensor networks for detecting mine methane. By contrast to the traditional methane detection, it has advantages of avoiding unnecessary missed alarm, which might lead to a serious consequence. In order to reduce the complexity of numeric calculation and improve the real-time performance of detection, a radial basis function network is applied for estimating information of the methane source. Simulations reveal that this presented method can effectively avoid missed alarm which probably happens with for traditional method. The study will develop a new field for the methane detection in mine industry. ©2007 IEEE.

关键词： Radial basis function networks

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Step-size optimization EASI algorithm for blind source separation

Step-size optimization EASI algorithm for blind source separ...

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2007 International Conference on Computational Intelligence and Security, CIS'07

作者： Weihong, Fu Xiaoniu, Yang Naian, Liu State Key Lab. of Integrated Service Networks Xidian University Xi'an 710071 China National Laboratory of Information Control Technology for Communication System Jiaxing Zhejiang 31403 China

ISBN: (纸本)0769530729

Aiming at the problem of blind source separation of the communication signals, we propose a step size optimization equivariant adaptive source separation via independence (SO-EASI) algorithm basing on the EASI block based algorithm. This algorithm adjusts the step-size by the steepest descent method and thereby greatly increases its convergence speed whatever value the step-size is initialized. Simulation results show that SO-EASI algorithm can effectively blindly separate the communication signals and these results also support the expected improvement in convergence speed of the approach. © 2007 IEEE.

关键词： Blind source separation

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Architecture and performance of a bidirectional OXC based on reversible optical switches with reduced complexity 33

Architecture and performance of a bidirectional OXC based on...

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2007 33rd European Conference and Exhibition of Optical Communication, ECOC 2007

作者： Qi, Yongmin Hu, Weisheng Dong, Yi Zhong, Wen-De Xu, Xinyu He, Hao Jin, Yaohui Guo, Wei Sun, Weiqiang Xiao, Shilin Su, Yikai State Key Lab. of Advanced Optical Communication System and Network Shanghai JiaoTong University Shanghai200240 China Network Technology Research Centre Nanyang Technological University Singapore639798 Singapore

By exploiting the symmetry of bidirectional wavelength-connections in WDM networks, we propose an NxN bidirectional OXC using one N/2xN/2 reversible optical switch to reduce the complexity of the OXCs. The feasibility... 详细信息

ISBN: (纸本)9783800730421

关键词： Optical switches

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Mapping Query to Semantic Concepts: Leveraging Semantic Indices for Automatic and Interactive Video Retrieval

Mapping Query to Semantic Concepts: Leveraging Semantic Indi...

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International Conference on Semantic Computing

作者： Dong Wang Zhikun Wang Xirong Li Xiaobing Liu Jianmin Li Bo Zhang State Key Lab of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing China

Quite recently, a few hundreds of semantic concepts are detected automatically with varied performance and subsequently, a new video retrieval paradigm of query-by-concept emerges. In this paper, we consider the problem of exploiting the potential of learned semantics concepts, together with the combination of traditional methods, for automatic and interactive retrieval. We argue that it is important, in both automatic and interactive retrieval scenarios, to find a few relevant concepts to search with, given a multimedia query. For automatic retrieval, we show that both text and image inputs are useful for solving this query-concept-mapping (QUCOM) problem. For interactive retrieval, searching with relevant concepts plus conventional feedback methods is quite effective and is robust to initial search results. Experimental evidence on the search task of TRECVID 2006 shows that by solving QUCOM with a large lexicon of 311 semantic concept detectors, the automatic retrieval performance increases 20% and the interactive retrieval performance has the potential to outperform the state-of-the-art systems.

关键词： Image retrieval Information retrieval Feedback Detectors Humans Layout Snow Videoconference intelligent systems Computer science

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Color image filtering based on impulsive noise detection

Color image filtering based on impulsive noise detection

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MIPPR 2007: Automatic Target Recognition and Image Analysis;and Multispectral Image Acquisition

作者： Li, Dehua Jin, Lianghai Yao, Xingzhong Xiong, Caiquan State Key Lab. for Image Processing and Intelligent Control Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan 430074 China Second Artillery Command College Wuhan 430012 China School of Computer Science Hubei University of Technology Wuhan 430068 China

ISBN: (纸本)9780819469502

This paper introduces a new class of switching vector median filter. The proposed algorithm first uses four directional masks to analyze the color difference between the central pixel and its neighborhood pixels in the RGB color space and classify each color pixel into noisy pixel or noise-free one, and then employs the standard vector median filtering operations in the detected noisy locations to restore the corrupted pixels and leave the noise-free ones unchanged. The simulation results show that the proposed method excellently suppresses impulsive noise as well as preserving the image details well, and significantly outperforms the existing vector filtering solutions in terms of both the objective measures and the perceptual visual quality.

关键词： Color image processing

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Preparation of TiO films by cathode multi arc ion and its performance

Preparation of TiO films by cathode multi arc ion and its pe...

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International Nano-Optoelectronic Workshop, iNOW

作者： Duojin, Fan Duowang, Fan Chenglong, Wang Lingxiao, Ming Lin, Zhao Hongzhong, Liu Lanzhou Dachen Automatic Control System Co. Ltd. Lanzhou 730070 China MOE Key Lab. of Opto-electronic Technology and Intelligence Control Lanzhou Jiaotong University Lanzhou 730070 China State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 China

TiO films were prepared by custom-made Cathode Multi Arc Ion equipment. Experimental test results reveal that our equipment can easly deposite big area scale TIO, particle size is in nanometer scale. © 2007 IEEE.

ISBN: (纸本)1424415918

关键词： Particle size

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A long-distance control platform on environment urgency incident based on GSM\GPRS and 3S technology

A long-distance control platform on environment urgency inci...

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2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007

作者： Wenzheng, Li Su, Li Jianjun, Zhou Dafang, Zhuang Computer College Beijing Technology and Business University Beijing 100037 China College of Information and Electrical Engineering China Agricultural University Beijing 100083 China State Key Lab. of Resource and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

ISBN: (纸本)1424412129

Applying modern information management technology to traditional environment field is the sign of making environment protection work modern and the necessitous task that environment protection departments are confronting. Building long-distance control platform on environment urgency incident has become one of the important tasks of safeguarding sustainable environment development in our country in order to enhance reaction ability to environment urgency incident and increase management strength to environment pollution incident. This paper built long-distance control platform on environment urgency incident depending on modern and high science technology with state environmental protection administration of China's guidance. This platform regarded GIS as base support surroundings and synthetically applied GIS, GPS and RS technology, wireless communication and transmission technology, Internet technology and so on. There is a detailed introduction to platform framework, relative technology, work principle and process, data organization, software realization and application etc. in this paper. © 2007 IEEE.

关键词： Global system for mobile communications

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