Affiliation: | (1) Electronic Data Systems Inc., 750 Tower Drive CPS, Mail Stop 7121, Troy, MI 48098, USA (e-mail: yhan01@cps.plnin.gmeds.com) , US;(2) Department of Computer Science, Gunma University, Kiryu, 376 Japan (e-mail: igarashi@comp.cs.gunma-u.ac.jp) , JP |