Tài liệu Advances in Database Technology- P16 pptx
Tài liệu Advances in Database Technology- P16 pptx
... changes and maintain good levels ofresource provisioning for applications. Finally, critical areas that involve contin-uously changing and voluminous spatio-temporal data include intelligent ... present in the original After all, we have obtained that series by discarding data points in the original, and we never invented new data points, let alone time stamps.Assume that has data points ... 5.2Related Work In [6,16] distributed extendible and linear hashing are examined. A combineddistributed index-hashing approach for one-dimensional data is proposed in [10].Indexing suitable for...
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Tài liệu Advances in Database Technology- P1 pptx
... could be obtained through mining or just from in- formation retrieval. Data mining is an important tool in making the web moreintelligent. That is, data mining may be used to mine the data on ... withwork on information systems engineering involving, for example, databases and webservices.E. Bertino et al. (Eds.): EDBT 2004, LNCS 2992, pp. 3–16, 2004.© Springer-Verlag Berlin Heidelberg ... computa-tional origins and information systems engineering aspects have received scantattention. The development within the GRID community of the W3C-inspiredOGSA indicates a willingness to move in a direction...
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Tài liệu Advances in Database Technology- P18 pptx
... operators (point, range, tree structure, nearestneighbor, skyline, etc.)Additionally, there are applications for creating databases, loading (bulk andrandom insertion), inspecting the database/ index ... exclusionconstraints). Allowing union in the query language is crucial for being able toextract indefinite disjunctive information from an inconsistent database (see Ex-ample 1).Future work includes ... instance obtained by changing the given instanceusing a minimal set of insertions/deletions. Intuitively, consistent query answersare independent of the way the inconsistencies in the data would...
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Tài liệu Advances in Database Technology- P2 ppt
... spatial index over object locations.Indexing Queries. The second centralized approach to processing spatial continuousqueries on moving objects is by indexing queries. In this approach a spatial index, ... watermark.Energy-Conserving Air Indexes for Nearest Neighbor Search51Fig. 1. Data and Index Organization Using the Interleaving Techniquefor broadcasting along with the data objects [8]. By first examining the indexinformation ... enabling a single linear access of the upper-level index for anyquery point. In addition, to avoid rollback operations in the lower-level index, wetry to maintain each grid cell in a size such...
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Tài liệu Advances in Database Technology- P3 docx
... minimizethe information loss in moving from clustering to clustering This informationloss is given by We can also view the informationloss as the increase in the uncertainty. Recall thatSinceH(A) ... Constrained Indexing and Query Indexing are proposedfor efficient evaluation of this kind of queries at a central location. Several other indexingstructures and algorithms for handling moving ... 69-84.Bradley, P., Fayyad, U., & Reina, C. (1998). Scaling Clustering Algorithms to LargeDatabases. In proceedings of the Int’l Conference on Knowledge Discovery and DataMining. New York, NY, Aug 27-31....
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Tài liệu Advances in Database Technology- P4 pdf
... is based upon ciphertext, while, in thesecond, the intermediate index is based upon plaintext and the final index isobtained by encrypting the intermediate index. Based upon characteristics ... xor-ing them) to obtain ciphertext.Decryption involves reversing the process: combining the key-stream with theciphertext to obtain the original plaintext. Along with the initial encryption key,additional ... example, in a movie database, we may be interested in discovering clusters of directors or actors,which in turn could help in improving the classification of movie tuples. Given thejoint distribution...
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Tài liệu Advances in Database Technology- P5 pdf
... Preserving Data Mining187We maintain the total number of records in that group. This number isdenoted byWe make the following simple observations:Observation 1: The mean value of attribute in ... predicates in betweenand not involving prefix-matching, whereas with or it isthe number of equality predicates in between and a constant orbetween and a constant not involving prefix-matching. Matrices ... appearing in A move fromis done by first randomly extractinga predicate pred from Pred. Let and be the containers involved in pred (forinstance pred makes an equality comparison, such as or an inequality...
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Tài liệu Advances in Database Technology- P6 docx
... relationaldatabases 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 ... USA,2002.J. Chomicki. Querying with intrinsic preferences. In Proc. of the Int. Conf. on Advances in Database Technology (EDBT), Prague, Czech Republic, 2002R. Fagin, A. Lotem, M. Naor. Optimal ... Experiences. In Proc.of the Int. Conf. on Very Large Databases (VLDB’02), Hong Kong, China, 2002D. Kossmann, F. Ramsak, S. Rost. Shooting Stars in the Sky: An Online Algorithm forSkyline Queries. In...
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Tài liệu Advances in Database Technology- P7 ppt
... environment.5.3Phonetic IndexingWe now outline a phonetic indexing technique that may be used for accessing the near-equal phonemic strings, using a standard database index. We exploit the following twofacts ... extending the approximate indexing techniques outlined in [1,21] for creating a metric index for phonemes. We are working on an inside-the-engineimplementation of LexEQUAL on an open-source database ... let usintroduce the collinear relation between a point and two regions.Definition 9. A point P is collinear to two regions B and C, collinear(P, B, C), ifthere exists a line l intersecting...
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Tài liệu Advances in Database Technology- P8 docx
... designing the annotationspecifications, considering the specifics of data integrity constraint checking, andascertaining the impact on particular tools remain challenging (and interesting) tasks.focuses ... watermark.Computing and Handling Cardinal Direction Information335Fig. 3. Polygon clipping3Computing Cardinal Direction RelationsTypically, in Geographical Information Systems and Spatial Databases, ... (i.e., in Fig. 9), in the fourth case, we usethe south line of and in the last case, we use the north line of In all cases, we use the edges of that fall in the tile of thatwe are interested in. ...
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