Tài liệu Advances in Database Technology- P19 ppt

... instance obtained by changing the given instance using a minimal set of insertions/deletions. Intuitively, consistent query answers are independent of the way the inconsistencies in the data would ... exclusion constraints). Allowing union in the query language is crucial for being able to extract indefinite disjunctive information from an inconsistent database (see Ex- ample 1). Future...

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Tài liệu Advances in Database Technology- P1 pptx

... could be obtained through mining or just from information retrieval. Data mining is an important tool in making the web more intelligent. That is, data mining may be used to mine the data on ... with work on information systems engineering involving, for example, databases and web services. E. Bertino et al. (Eds.): EDBT 2004, LNCS 2992, pp. 3–16, 2004. © Springer-Verlag Berlin Heidelbe...

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Tài liệu Advances in Database Technology- P2 ppt

... watermark. Energy-Conserving Air Indexes for Nearest Neighbor Search 51 Fig. 1. Data and Index Organization Using the Interleaving Technique for broadcasting along with the data objects [8]. By first examining the index information ... sorted according to the x-dimension since the grid cell is flat. Given a query point shown in the figure, nine objects are broken into two lists, with one co...

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Tài liệu Advances in Database Technology- P7 ppt

... Matching. Most database systems allow matching text strings using pseudo- phonetic Soundex algorithm originally defined in [11], primarily for Latin-based scripts. In summary, while current databases ... environment. 5.3 Phonetic Indexing We now outline a phonetic indexing technique that may be used for accessing the near- equal phonemic strings, using a standard database index. We ex...

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Tài liệu Advances in Database Technology- P16 pptx

... In Proc. Int. Symp. on Spatial Databases, pages 123–141, Singapore, 1993. Paul F. Dietz and Daniel D. Sleator. Two algorithms for maintaining order in a list. In Proceedings of the nineteenth ... changes and maintain good levels of resource provisioning for applications. Finally, critical areas that involve contin- uously changing and voluminous spatio-temporal data include intelligent...

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Tài liệu Advances in Database Technology- P18 pptx

... instance obtained by changing the given instance using a minimal set of insertions/deletions. Intuitively, consistent query answers are independent of the way the inconsistencies in the data would ... exclusion constraints). Allowing union in the query language is crucial for being able to extract indefinite disjunctive information from an inconsistent database (see Ex- ample 1). Future...

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Tài liệu Advances in Database Technology- P3 docx

... approaches in query processing for moving object trajectories. In VLDB, 2000. S. Prabhakar, Y. Xia, D. V. Kalashnikov, W. G. Aref, and S. E. Hambrusch. Query indexing and velocity constrained indexing: ... “Incremental Clustering for Mining in a Data Warehousing Environment”, VLDB 98 Ester M., Kriegel H P., Sander J., Xu X.: “A Density-Based Algorithm for Discovering Clusters in Large...

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Tài liệu Advances in Database Technology- P4 pdf

... is based upon ciphertext, while, in the second, the intermediate index is based upon plaintext and the final index is obtained by encrypting the intermediate index. Based upon characteristics ... xor-ing them) to obtain ciphertext. Decryption involves reversing the process: combining the key-stream with the ciphertext to obtain the original plaintext. Along with the initial encryption key,...

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Tài liệu Advances in Database Technology- P5 pdf

... following information is maintained about each group of records For each attribute we maintain the sum of corresponding values. The corresponding value is given by We denote the corresponding first- order ... Preserving Data Mining 195 data set is a good substitute for privacy preserving data mining algorithms. For each dimension pair let the corresponding entries in the covariance matrix f...

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Tài liệu Advances in Database Technology- P6 docx

... relational databases into an XML format or to store the information in an XML object in a relational database, increasing the cost of e-business development. Moreover, specifying the mapping in the ... (such as preceding-sibling and following-sibling). Even more complex are the following and preceding axes. Our goal in normalizing the Xpath expression is to bring it to a form in wh...

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