2HAN J W, KAMBER M. Data mining: concepts and techniques [M]. Morgan Kaufmann Publishers,2000.
3ESTER M,KRIEGER H P,SANDER J,et al. A density-based algorithm fordiscovering clusters in large spatial databases withnoise [C]. Proc. of the 2nd Int'l Conf. on Knowledge Discovery and DataMining, 1996.
4STUDER R, BENJAMINS V R, FENSEL D. Knowledge engineering:principles and methods[J]. Data and Knowledge Engineering, 1998,25(1/2) :161-197.
7Smith B, Mark D. Geographic Categories: An Ontological Investigation. International Journal of Geographic Information Science, 2001,15(7): 591～612.
8Bittner T,Smith B. A Taxonomy of Granular Partitions.In: Daniel M eds. Spatial Information Theory. Proceedings of COSIT '2001. Berlin/New York: Springer,2001.
9Frank A U. Spatial Ontology: A Geographical Point of View.In: Stock O eds. Spatial and Temporal Reasoning.Dordrecht: Kluwer Academic Publishers,1997.
10Fonseca F T. Ontology-Driven Geographic Information Systems:[Ph.D Dissertation]. Maine: The University of Maine,2001.
10Baskaran P, Jayabalan N. Effect of growth regulators on rapid micropropagation and psoralen production in Psoralea eorytifolia L. Acta Physiol Plartt, 2008, 30(3): 345-351.
