INDEXING FUZZY NUMERICAL DATA WITH A B+ TREE FOR FAST RETRIEVAL USING NECESSITY-MEASURED FLEXIBLE CONDITIONS
- 1 August 2009
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
- Vol. 17 (supp01), 1-23
- https://doi.org/10.1142/s0218488509006005
Abstract
This paper proposes an indexing procedure for improving the performance of query processing on a fuzzy database. It focuses on the case when a necessity-measured atomic flexible condition is imposed on the values of a fuzzy numerical attribute. The proposal is to apply a classical indexing structure for numerical crisp data, a B +-tree combined with a Hilbert curve. The use of such a common indexing technique makes its incorporation into current systems straightforward. The efficiency of the proposal is compared with that of another indexing procedure for similar fuzzy data and flexible query types. Experimental results reveal that the performance of the proposed method is similar and more stable than that of its competitor.Keywords
This publication has 16 references indexed in Scilit:
- A B+-tree based indexing technique for fuzzy numerical dataFuzzy Sets and Systems, 2008
- Evaluating different approaches for indexing fuzzy setsFuzzy Sets and Systems, 2003
- Analysis of the clustering properties of the Hilbert space-filling curveIEEE Transactions on Knowledge and Data Engineering, 2001
- Index structures for efficiently accessing fuzzy data including cost models and measurementsFuzzy Sets and Systems, 1999
- A server for Fuzzy SQL queriesPublished by Springer Science and Business Media LLC ,1998
- SQLf: a relational database language for fuzzy queryingIEEE Transactions on Fuzzy Systems, 1995
- G-tree: a new data structure for organizing multidimensional dataIEEE Transactions on Knowledge and Data Engineering, 1994
- Generalizing database relational algebra for the treatment of incomplete or uncertain information and vague queriesInformation Sciences, 1984
- Ubiquitous B-TreeACM Computing Surveys, 1979
- Organization and maintenance of large ordered indexesActa Informatica, 1972