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Research of Extracting Data from HTML Web Pages Automatically

Journal of Beijing Institute of technology 2003年第S1期12卷 104-108页

作者：王茹宋瀚涛陆玉昌 Department of Computer Science and Engineering School of Information Science and TechnologyBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Intelligent Technology and System Tsinghua UniversityBeijing 100084China

In order to use data information in the Internet, it is necessary to extract data from web pages. An HTT tree model representing HTML pages is presented. Based on the HTT model, a wrapper generation algorithm AGW is proposed. The AGW algorithm utilizes comparing and correcting technique to generate the wrapper with the native characteristic of the HTT tree structure. The AGW algorithm can not only generate the wrapper automatically, but also rebuild the data schema easily and reduce the complexity of the computing.

关键词： information extraction data transformation wrapper HTML page

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A network service framework for mobile pervasive computing

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International Conference on Communication technology (ICCT)

作者： Enyi Chen Yuanchun Shi Guangyou Xu Department of Computer Science and Technology The State Key Laboratory on Intelligence System and Technology Tsinghua University Beijing China

ISBN: (纸本)7563506861

In this paper, we propose a framework for wireless/mobile pervasive computing to augment capabilities and to save scanty resources of mobile host by making full use of available resources in the surrounding. Firstly, a mobile device finds and utilizes the cheap computer as a surrogate to forward the service requests. Secondly, after the surrogate discovers the services, it will filter, synthesize or handoff them according to the context information. We also take consideration of robustness, scalability, and load balancing by utilizing multi surrogates. Service descriptions are encoded by the extensible markup language (XML) technology to provide flexibility. The analytical results on the performance of our framework show that it has significant advantages in terms of reducing wireless bandwidth consumption, ant etc.

关键词： Mobile computing Pervasive computing XML information filtering information filters Context-aware services Robustness Scalability Load management Performance analysis

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Seamless provisioning of service in the ubiquitous computing environment

Seamless provisioning of service in the ubiquitous computing...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： En-Yi Chen De-Gan Zhang Yuan-Chun Shi Guang-You Xu The State Key Laboratory of Intelligence System and Technology Department of Computer Science and Technology Tsinghua University Beijing China

ISBN: (纸本)0780378652

In the ubiquitous computing environment (UCE), how to seamlessly provision the service or application to its occupant or its mobile user is an interesting research topic. This paper introduces our two UCEs called smart classroom (SCR) and intelligent meeting room (IMR) respectively. When a teacher gives his lesson in the SCR, different services will automatically be provisioned to him according to captured context information. When the users with various kinds of portable devices, such as PDA, mobile phone or laptop, attend a meeting in IMR, they can easily organize a meeting and unobtrusively access the services provided by IMR, for example, they could give presentation by "projector service". The paper also describes the software infrastructure of SCR and IMR - smart platform, a multi agents (MAs) system.

关键词： Ubiquitous computing Pervasive computing Thyristors Portable computers Application software Mobile computing Embedded software computer networks Space technology Education

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Online recommendation based on customer shopping model in e-commerce 03

Online recommendation based on customer shopping model in e-...

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Junzhong Ji Zhiqiang Sha Chunnian Liu Ning Zhong College of Computer Science and Technology Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology Beijing University of Technology Beijing China Department of Information Engineering Maebashi Institute of Technology Maebashi Japan

ISBN: (纸本)0769519326

As e-commerce developing rapidly, it is becoming a research focus about how to capture or find customer's behavior patterns and realize commerce intelligence by use of Web mining technology. Recommendation system in electronic commerce is one of the successful applications that are based on such mechanism. We present a new framework in recommendation system by finding customer model from business data. This framework formalizes the recommending process as knowledge representation of the customer shopping information and uncertainty knowledge inference process. In our approach, we firstly build a customer model based on Bayesian network by learning from customer shopping history data, then we present a recommendation algorithm based on probability inference in combination with the last shopping action of the customer, which can effectively and in real time generate a recommendation set of commodity.

关键词： Data mining Business Knowledge representation Collaboration Web mining Uncertainty Bayesian methods History Inference algorithms Filtering

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Advances in simulated modeling of vibration systems based on computational intelligence

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自然科学进展(英文版) 2002年第12期12卷 881-886页

作者： LIANG Yanchun LEE Heow Pueh LIN Wuzhong LIM Siak Piang LEE Kwok Hong Zhou Chunguang College of Computer Science and Technology Jilin University Changchun 130012 China Institute of High Performance Computing Singapore 117528 Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sci Institute of High Performance Computing Singapore 117528 Department of Mechanical Engineering National University of Singapore Singapore 119260 Singapore College of Computer Science and Technology Jilin University Changchun 130012 China

Computational intelligence is the computational simulation of the bio-intelligence, which includes artificial neural networks, fuzzy systems and evolutionary computations. This article summarizes the state of the art in the field of simulated modeling of vibration systems using methods of computational intelligence, based on some relevant subjects and the authors' own research work. First, contributions to the applications of computational intelligence to the identification of nonlinear characteristics of packaging are reviewed. Subsequently, applications of the newly developed training algorithms for feedforward neural networks to the identification of restoring forces in multi-degree-of-freedom nonlinear systems are discussed. Finally, the neural-network-based method of model reduction for the dynamic simulation of microelectromechanical systems (MEMS) using generalized Hebbian algorithm (GHA) and robust GHA is outlined. The prospects of the simulated modeling of vibration systems using techniques of computational intelligence are also indicated.

关键词： computational intelligence artificial neural network fuzzy system evolutionary computation vibration system

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Efficient information retrieval based on a combination of vector space and probabilistic models

Efficient information retrieval based on a combination of ve...

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IEEE International Conference on systems, Man and Cybernetics

作者： Min Zhang Shaoping Ma State Key laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing China

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A novel learning method for special Bayesian networks

A novel learning method for special Bayesian networks

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World Congress on Intelligent Control and Automation (WCICA)

作者： Tian Fengzhan Xu Ke Zhang Hongwei Lu Yuchang The State Key Laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing China

In this paper, a novel learning method for special Bayesian networks which consist of noisy-OR and noisy-AND nodes is introduced. This method can learn networks with hidden variables and discover hidden variables when necessary. Compared with previous techniques for learning Bayesian networks, it uses the information in the data to guide the search for useful revisions, and can greatly improve the efficiency of the algorithm. Furthermore, this method can also be used for theory refinement. The experiments demonstrate that its performance is comparable to that of other existing hybrid theory refinement systems, while the networks produced by this method have more precise semantics and are more easily understood. In addition, this method also provides a direct mechanism for incorporating knowledge expressed as propositional Horn-clause rules into a Bayesian network. This mechanism could potentially ease the process of building Bayesian networks.

关键词： Learning systems Bayesian methods Laboratories Intelligent systems Intelligent networks computer science Electronic mail Refining Intelligent control Automation

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Improving Chinese Storing Text Retrieval systems' security via a Novel Maximal Prefix Coding

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International Journal of computer Processing of Languages 2002年第4期15卷 379-393页

作者： D. Y. LONG W. J. JIA P. O. AU M. LI Department of Computer Science Zhongshan University Guangzhou 510275 PRC State Key Lab. of Information Security Chinese Academy of Science Beijing 100080 PRC Department of Computer Engineering and Information Technology City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong SAR PRC School of Computing National University of Singapore Singapore

We have seen that Huffman coding has been widely used in data, image, and video compression. In this paper novel maximal prefix coding is introduced. Relationship between the Huffman coding and the optimal maximal prefix coding are discussed. We show that all Huffman coding schemes are optimal maximal prefix coding schemes and that conversely the optimal maximal prefix coding schemes need not be the Huffman coding schemes. Moreover, it is proven that, for any maximal prefix code C, there exists an information source I = (∑ P) such that C is exactly a Huffman code for I. Therefore, it is essential to show that the class of Huffman codes is coincident with one of the maximal prefix codes. A case study of data compression is also given. Comparing the Huffman coding, the maximal prefix coding is used not only for statistical modeling but also for dictionary methods. It is also good at applying to a large information retrieval system and improving its security.

关键词： Coding Data Compression Huffman Coding Maximal Prefix Coding

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Anaphora resolution in Chinese financial news for information extraction

Anaphora resolution in Chinese financial news for informatio...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Ning Wang Chunfa Yuan K.F. Wong Wenjie Li Department of Computer Science & Technology State Key Laboratory of Intelligent Technology and System Tsinghua University Beijing China Department of System Engineering & Engineering Management Chinese University of Hong Kong Hong Kong China Department of Computing Hong Kong Polytechnic University Hong Kong China

Anaphora always appears in the text and it is a hot topic in linguistics and computational linguistics area. Anaphora resolution is an important part of the information extraction, and it is also important to discourse understanding, machine translation, abstract extraction and so on. After studying on the text in Chinese financial domain, an anaphora resolution system is proposed, which is built on a set of filtration rules and a set of evaluation rules. The experiment result shows the precision is 91.4%.

关键词： Data mining Laboratories Intelligent systems computer science systems engineering and theory Research and development management Computational linguistics Filtration Intelligent control Automation

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On existence of 2-level autocorrelation sequences realized from the decimation-Hadamard transformation

On existence of 2-level autocorrelation sequences realized f...

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IEEE International Symposium on information Theory

作者： G. Gong Z. Dai S.W. Golomb Department of Electrical and Computer Engineering University of Waterloo Waterloo Canada State Key Laboratory of Information Security Graduate School (Beijing) University of Science and Technology Beijing China Communication Sciences Institute Electrical Engineering-Systems University of Southern California Los Angeles CA USA

We investigate the decimation-Hadamard transform (DHT) applied to 2-level autocorrelation sequences. We present the kth-order DHT by a matrix representation and show that odd order DHT cannot realize any 2-level autocorrelation sequences. We provide two interesting experimental results including one for the second-order DHT of the generalized GWM sequences.

关键词： Autocorrelation Laboratories computer security information security Galois fields Binary sequences

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