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Searching for authors named "Dimitris Papadias" – sorted by Relevance.

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  • Hill Climbing Algorithms for Content-Based Retrieval of Similar Configurations  
  • by Dimitris Papadias — 2000
  • …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  
  • by Dimitris Papadias — 1993 — In Proc. of European Conference on Spatial Information Theory (COSIT’93
  • …. 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…
  • Cited by 2 (1 self) – Add To MetaCart
  • Slot Index Spatial Join  
  • by Nikos Mamoulis, Dimitris Papadias — 2003 — IEEE Transactions on Knowledge and Data Engineering
  • …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…
  • Cited by 14 (2 self) – Add To MetaCart
  • Relation-Based Similarity  
  • by Dimitris Papadias, Vasilis Delis — 1997 — Proceedings of the 5th ACM Workshop on GIS, Las Vegas, ACM
  • …: 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…
  • Cited by 4 (0 self) – Add To MetaCart
  • Spatial Queries in Dynamic Environments  
  • by Yufei Tao, Dimitris Papadias — 2003
  • …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…
  • Cited by 20 (7 self) – Add To MetaCart
  • Adaptive Index Structures  
  • by Yufei Tao, Dimitris Papadias — 2002
  • …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.…
  • Cited by 4 (0 self) – Add To MetaCart
  • Proxy-Server Architectures for OLAP  
  • by Panos Kalnis, Dimitris Papadias — 2001 — In SIGMOD
  • …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…
  • Cited by 6 (2 self) – Add To MetaCart
  • Approximate processing of multiway spatial joins in very large databases  
  • by Dimitris Papadias, Dinos Arkoumanis — 2002 — Proceedings of 8th EDBT Conference
  • …Abstract. Existing work on multiway spatial joins focuses on the retrieval of all exact solutions with no time limit for query processing. Depending on the query and data properties, however, exhaustive processing of multiway spatial joins can be prohibitively expensive due to the exponential nature…
  • Cited by 4 (0 self) – Add To MetaCart
  • Continuous Nearest Neighbor Queries over Sliding Windows  
  • by Kyriakos Mouratidis, Dimitris Papadias — 2007 — IEEE Transactions on Knowledge and Data Engineering (TKDE
  • …Abstract—This paper studies continuous monitoring of nearest neighbor (NN) queries over sliding window streams. According to this model, data points continuously stream in the system, and they are considered valid only while they belong to a sliding window that contains 1) the W most recent arrivals…
  • Cited by 3 (1 self) – Add To MetaCart
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