Received July 17, 1997; accepted May 1, 1998. Communicated by Wen-Lian Hsu. *A preliminary version of this paper appeared in the proceedings of the International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA’97) Las Vegas, Nevada, pp. 890-896, 1997. Research supported in part by NSC under Grant 83-0408-E-008-004. JOURNAL OF INFORMATION SCIENCE AND ENGINEER...

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