Congjun Yang

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Spatial databases have grown in importance in various fields. Together with them come various types of queries that need to be answered effectively. While queries involving single data set have been studied extensively, join queries on multi-dimensional data like the-closest pairs and the nearest neighbor joins have only recently received attention. In this(More)
The paper describes an immunogenetic approach to recognize spectra for chemical analysis. In particular, an immunological model for chemical reactions is introduced in which a population of specialists for each of the possible products was evolved using a genetic algorithm. Accordingly, a small well-trained specialist library is established and tested their(More)
In this paper we explore t h e problem of approximate nearest neighbor searches. W e propose a n i n d e x structure , t h e A N N-t r e e (approximate nearest neighbor tree) t o solve this problem. T h e A N N-t r e e supports high accuracy nearest neighbor search. T h e actual nearest neighbor of a query point can usually be f o u n d in the first leaf(More)
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