Searching for authors named Dimitris Papadias – sorted by Relevance.
112 documents found, showing 1 through 10.
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Hill Climbing Algorithms for Content-Based Retrieval of Similar Configurations
- …The retrieval of stored images matching an input configuration is an important form of content-based retrieval. Exhaustive processing (i.e., retrieval of the best solutions) of configuration similarity queries is, in general, exponential and fast search for sub-optimal solutions is the only way to d…
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Spatial Relation-Based Representation Systems
- …. The topic of the paper is spatial knowledge representation and processing. Several relation-based systems concerned with the explicit representation of spatial relations, and not of object characteristics, have been used in areas including visual scene matching, qualitative spatial reasoning and s…
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Processing and Optimization of Multiway Spatial Joins Using R-trees
- …One of the most important types of query processing in spatial databases and geographic information systems is the spatial join, an operation that selects, from two relations, all object pairs satisfying some spatial predicate. A multiway join combines data originated from more than two relations. A…
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Michelangelo Grigni
- …Geographical database systems deal with certain basic topological relations such as "A overlaps B" and "B contains C" between simply connected regions in the plane. It is of great interest to make sound inferences from elementary statements of this form. This problem has been identified extensively …
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Slot Index Spatial Join
- …Abstract—Efficient processing of spatial joins is very important due to their high cost and frequent application in spatial databases and other areas involving multidimensional data. This paper proposes slot index spatial join (SISJ), an algorithm that joins a nonindexed data set with one indexed by…
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Relation-Based Similarity
- …: Similarity queries constitute an active area in spatial query processing. The paper addresses the problem of qualitative similarity based on spatial relations. On the one hand spatial similarity entails mechanisms for representing and reasoning on spatial relations, while on the other it introduce…
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Spatial Queries in Dynamic Environments
- …this paper we formulate two novel query types, time parameterized and continuous queries, applicable in such environments. A timeparameterized query retrieves the actual result at the time when the query is issued, the expiry time of the result given the current motion of the query and database obje…
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A Computational Approach for Argumentative Discourse in Multi-Agent Decision Making Environments
- …This paper describes a Group Decision Support System for cooperative or non-cooperative argumentative discourses. The system provides agents means of expressing and weighing their individual arguments and preferences, in order to argue for or against the selection of a certain choice. It supports de…
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Adaptive Index Structures
- …Traditional indexes aim at optimizing the node accesses during query processing, which, however, does not necessarily minimize the total cost due to the possibly large number of random accesses. In this paper, we propose a general framework for adaptive indexes that improve overall query cost.…
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Proxy-Server Architectures for OLAP
- …Data warehouses have been successfully employed for assisting decision making by offering a global view of the enterprise data and providing mechanisms for On-Line Analytical processing. Traditionally, data warehouses are utilized within the limits of an enterprise or organization. The growth of Int…
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