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Taxonomy-based adaptive web search method

Taxonomy-based adaptive web search method

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Pahlevi, SM Kitagawa, H Univ Tsukuba Tsukuba Ibaraki 3058573 Japan

ISBN: (纸本)0769515061;076951507X

Current crawler-based search engines usually return a long list of search results containing a lot of noise documents. By indexing collected documents on topic path in taxonomy, taxonomy-based search engines can improve the search result qualities. However, the searches are limited to the locally compiled databases. In this paper we propose an adaptive web search method to improve the search result qualities enabling the users to search in many databases existing in the web space. The method has a characteristic that combines the taxonomy-based search engines and a machine learning technique. Afore specifically, we construct a rule-based classifier using pre-classified documents provided by a taxonomy-based search engine based on a selected context category on its taxonomy, and then use it to modify the user query. The resulting modified query will be sent to the crawler-based search engines and the returned results will be presented to the user. We evaluate the effectiveness of our method by showing that the returned results from the modified query almost contain documents that will be categorized into the selected context category.

关键词： Databases Humans Indexing information technology Machine learning Search engines Taxonomy Web pages Web search

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Results processing in a heterogeneous word

Results processing in a heterogeneous word

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Sun, GK Li, HZ Harbin Inst Technol Dept Comp Sci & Engn Harbin Peoples R China

ISBN: (纸本)0769515061;076951507X

In the distributed digital libraries, it allows users to access data of different modalities, from different information sources, and ranked by different criteria. But most applications make too many assumptions, and need too much information. In, this paper, we assume that each information retrieval model is satisfactory in its own context. Based on this assumption, we propose two results processing methods: Ranking by Sources (RBS) and Simply Merging Results (SMR). In RBS, we define satisfied ranking, which is the ranking satisfying most source rankings, and satisfied distance, which indicates how 7 specific source ranking suits the satisfied ranking. RBS groups the results by the ranked sources, which is sorted by their satisfied distances. In SMR, for each result, we substitute the normalised score for its original scores, and then merge them using normalized scores. The experiment showed that our methods are very feasible in the rapid expanding distributed digital libraries.

关键词： Application software Computer science Context modeling Data engineering Fuzzy neural networks information retrieval Internet Merging Software libraries Sun

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Watermarking in online media e-business

Watermarking in online media e-business

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Kwok, SH Yang, CC Hong Kong Univ Sci & Technol Dept Informat & Syst Management Kowloon Hong Kong Peoples R China

ISBN: (纸本)076951507X

The need of copyright protection has become a detachable requirement for online media e-business as online multimedia businesses and enabling technologies become viable in recent years. Watermarking enables copyright protection in e-business but it also slows down the packaging process for delivery. The requirement of instant delivery is a prime requirement for online business. In the literature, extensive research on water-marking performance has been emphasized on imperceptibility and robustness but not the efficiency factor for online e-business, for example processing time and storage requirement that are crucial to the success of online e-business. In this paper, we investigate four watermarking schemes derived from one-bit watermarking, multiple-bit water-marking and their combinations in order to identify viable watermarking scheme that can meet the requirements of online e-business. The performance of these schemes in terms of preparation time, delivery time and storage requirement were measured and reported in this paper. Our analysis proves that the watermarking schemes with multiple-bit watermarking can ensure instant delivery with a penalty of some extra storage requirements.

关键词： Copyright protection Engineering management information management Multimedia systems Research and development management Robustness Systems engineering and theory technology management Water storage Watermarking

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Strategic exploitation of ERP for e-business

Strategic exploitation of ERP for e-business

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Akhgar, B Siddiqi, J Al-Khayatt, S Sheffield Hallam Univ Sch Comp & Management Sci Sheffield S1 1WB S Yorkshire England

ISBN: (纸本)076951507X

Modern organisations currently face a multitude of technologies that are seeking to climb on the budgetary agenda of management boards. Two of the main contenders are Enterprise Resource Planning and e-business related technologies. There appears to be a misunderstanding not well publicised, regarding the relationship between both ERP and e-business particularly the viewpoint that ERP is a platform for e-business. This paper, based on research from an ongoing IS investigation project at a large multinational company, examines this relationship, The paper discusses different scenarios of ERP implementation status that organisations may find themselves part of It examines the components of e-business success, namely: visibility of information, processes and technology that will be either enabled or restricted by ERP. What transpires from this research is that for many start-ups e-business becomes synonymous with business in general. We argue that e-business should form part of the corporate strategy and that IS or IT strategy should form the basis for determining ERP implementation structures thereby ensuring e-business requirements become the platform for ERP.

关键词： Books Business Collaborative tools Companies Consumer electronics Enterprise resource planning Financial management Industrial electronics Internet technology management

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Improve precategorized collection retrieval by using supervised term weighting schemes

Improve precategorized collection retrieval by using supervi...

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Zhao, Y Karypis, G Univ Minnesota Dept Comp Sci Minneapolis MN 55455 USA

ISBN: (纸本)076951507X

The emergence of the world-wide-web has led to an increased interest in methods for searching for information. A key characteristic of many, of the online document collections is that the documents have predefined categoric information, for example, the variety of scientific articles accessible via digital libraries (e.g., ACM, IEEE, etc.), medical articles, news-wires, and various directories (e.g., Yahoo, OpenDirectory Project, etc.). However most previous information retrieval systems have not taker the pre-existing category information into account. In this paper we present weight adjustment schemes based upon the category information in the vector-space model, which are able to select the most content specific and discriminating features. Our experimental results on TREC data sets show that the pre-existing category information does provide additional beneficial information to improve retrieval. The proposed weight adjustment schemes perform better than the vector-space model with the inverse document frequency (IDF) weighting scheme when queries are less specific. The proposed weighting schemes can also benefit retrieval when clusters are used as an approximation to categories.

关键词： Computer science Contracts Frequency Indexing information retrieval Inverse problems Software libraries Text categorization Text mining US Department of Energy

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STED:: A system for topic enumeration and distillation

<i>STED</i>:: A system for topic enumeration and distillatio...

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Greco, G Greco, S Zumpano, E Univ Calabria DEIS I-87030 Arcavacata Di Rende Italy

ISBN: (纸本)0769515061;076951507X

Search set-vices on hyperlinked data are becoming popular among users because of the huge amount of data available and the consequent difficulty in retrieving and filtering relevant documents. Traditional Term-Based search engines are not very useful for this purpose since the resulting ranking depends on the users's precision in expressing the query. Current research, instead, takes a different approach, called Topic Distillation, which consists in finding documents related to the query topic, but these do not necessarily contain the query string. Current algorithms for topic distillation first compute a base set containing all the relevant pages and then apply an iterative procedure to obtain the authoritative pages. In this paper we present STED, a system for topic distillation and enumeration (i.e. identification of different communities) of web documents. The system is based on a technique which computes the authoritative pages by analyzing the structure of the base set. More specifically, the system applies a, statistic approach to the co-citation matrix associated with the base set, to find the most co-cited pages and analyzes both the link structure and the content of pages. Several experiments have demonstrated the effectiveness and efficiency of the system.

关键词： information processing on the web databases and information retrieval semi-structured data web searching and mining.

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Internet browsing: Visualizing category map by fisheye and fractal views

Internet browsing: Visualizing category map by fisheye and f...

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3rd international conference on information technology: coding and computing (itcc 2002)

作者： Yang, CC Chen, HC Hong, K Chinese Univ Hong Kong Dept Syst Engn & Engn Management Hong Kong 100083 Hong Kong Peoples R China

ISBN: (纸本)076951507X

Category map developed based on Kohonen's self-organizing map has been proven to be a promising browsing tool for solving the information overload problem in World Wide Web. The SOM algorithm automatically compresses and transforms a complex information space into a two-dimensional graphical representation. Such graphical representation provides a user-friendly interface for users to explore the automatically generated mental model. However, as the amount of information increases, it is expected to increase the size of the category map accordingly in order to accommodate the important concepts in :he information space, which increases the visual load of the category map. In this paper. we propose the fisheye views and fractal views to support the visualization of category map. Fisheye views are developed based on the distortion approach while fractal views are developed based on the information reduction approach. We have developed a prototype system and conducted a user evaluation to investigate the performance of fisheye views and fractal views. The results show that both fisheye views and fractal views significantly increase the effectiveness of visualizing category map. In addition, fractal views are significant better than fisheye views.

关键词： Computer science Fractals information filtering information filters Internet Management information systems Research and development management Systems engineering and theory Visualization Web sites

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Scalar BPM analyses of TE and TM polarized fields in bent waveguides

Scalar BPM analyses of TE and TM polarized fields in bent wa...

引用

international conference on information technology: coding and computing, itcc 2002

作者： Song, Won Jay Ahn, Byung Ha Systems Engineering and Operations Research Labs Department of Mechatronics KwangJu Institute of Science and Technology 500-712 Korea Republic of

ISBN: (纸本)0769515061

We have applied the effective index method to reduce the two-dimensional refractive index profile into the one-dimensional refractive index structure and modified the wave equations to obtain paraxial wave equations. TE and TM polarized fields in the curved single-mode planar waveguides are analyzed using the scalar beam-propagation method employing the finite-difference method with a slab structure. The bending loss in bent waveguides is analyzed for optical fields obtained from the beam-propagation method and comparisons are made between the loss for the waveguides with various radii of curvature and refractive index differences. The outward shift of the optical field, which is generated at the connection between a straight and bent waveguide, is obtained from calculations of the location of maximum optical intensity. The transition loss can be reduced by introducing an optimized inward offset at a straight-to-bend junction. The wavelength shift due to birefringence of TE and TM polarized fields in bent waveguides is also calculated. © 2002 IEEE.

关键词： Light polarization

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Joint source-channel coding using simplified block-based segmentation and content-based rate-control for wireless video transport

Joint source-channel coding using simplified block-based seg...

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Aramvith, S Kortrakulkij, H Tancharoen, D Jitapankul, S Chulalongkorn Univ Dept Elect Engn Digital Signal Proc Res Lab Bangkok Thailand

ISBN: (纸本)0769515061;076951507X

The scenario of using Automatic Repeat reQuest (ARQ) retransmission for two-way low bit-rate video communications over wireless Rayleigh fading channels is being studied. In this kind of channel, the packets are inevitably experienced errors during deep fades. The retransmissions can be used to re-sent such packets. During retransmissions, the video encoder buffer fills zip quickly and may cause the rate-control algorithm to skip frames or allocate less number of bits to encode video frame. To reduce the number of frames skipped and improve bit allocation, in this paper we propose a content-based rate-control scheme using simplified block-based segmentation to intelligently allocate more bits to foreground region. In addition, our proposed scheme also takes into consideration the effects of the video bufferfill-up, an a priori channel model, channel feedback information. The simulation results indicate that our proposed scheme encode the video sequences with higher quality on foreground region and much fewer frame skipping as compared to H.263 TMN8.

关键词： Automatic repeat request Bit rate Change detection algorithms Digital signal processing Face detection Fading Feedback Image segmentation Video compression Wireless communication

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Distributed power control using the simultaneous mutation of genetic algorithms in cellular radio systems

Distributed power control using the simultaneous mutation of...

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international conference on information technology: coding and computing, itcc 2002

作者： Song, Won Jay Ahn, Byung Ha Systems Engineering and Operations Research Labs Department of Mechatronics KwangJu Institute of Science and Technology 500-712 Korea Republic of

ISBN: (纸本)0769515061

This paper has proposed a distributed power control algorithm that uses a stochastic search technique in order to solve linear systems of equations for power update in CDMA cellular radio systems. The proposed algorithm is developed by applying Bremermann's evolutionary computation algorithm to the CDMA power control problem. The major advantage of the applied evolutionary computation algorithm is more rapid optimization on linear systems of equations compared with the simple genetic algorithm (SGA). By employing distributed constrained power control (DCPC) as a reference algorithm, we have designed and implemented computational experiments on the DS-CDMA system. The results indicate that the proposed algorithm significantly enhances the optimization speed of power control. The proposed algorithm is also compared with the bang-bang type algorithm used in the IS-95 and W-CDMA systems. The results show that our proposed algorithm also has the potential to increase the CDMA cellular radio network capacity and decrease the mobile terminal power consumption. © 2002 IEEE.

关键词： Stochastic systems

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