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    National Tsing Hua University Institutional Repository > 歷任校長 > 李家同 (1993-1994) > 期刊論文  >  Symbolic Gray Code as a Multikey Hashing Function


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80777


    Title: Symbolic Gray Code as a Multikey Hashing Function
    Authors: Du, H. C.;Lee, R. C. T.
    教師: 李家同
    Date: 1980
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: IEEE Transactions on Pattern Analysis and Machine Intelligence, Institute of Electrical and Electronics Engineers, Volume PAMI-2, Issue 1, 1980, Pages 83-90
    Keywords: Multi-key
    Symbolic Gray Code
    Hashing Function
    Abstract: In this paper, we extend the binary Gray code to symbolic Gray code. We then show that this symbolic Gray code can be used as a multikey hashing function for storing symbolic records. The record stored at location k and the record stored at location k + 1 will be nearest neighbors if this hashing function is used. Thus, this symbolic Gray code hashing function exhibits some kind of clustering property which will group similar records together. This property is a desirable property for designing nearest neighbor searching (also called best match searching) systems. There are many other interesting properties of this hashing function. For instance, there exists an address-to-key transformation which can be used to determine the record stored at certain location k if this hashing function is used. Besides, if there are totally M records, we only have to reserve exactly M locations; there are no collisions and wasting of memory storage. At the end of this paper, it is shown that the resulting file exhibits the multiple-attribute tree structure.
    Relation Link: http://www.ieee.org/index.html
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80777
    Appears in Collections:[李家同 (1993-1994)] 期刊論文
    [資訊工程學系] 期刊論文

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