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3(,453000):,,,,,:;;;:G712:A:100822093(2007)0520107202,,,,,,,,,,1,,,,90,,,,,,,,,,,,,,,,,,2,,,,,,,,,:(),:(),,,,(),1:1,,,,,,,,,,,,,,,,,T,(),,,;,,,,701155200709JournalofHenanMechanicalandElectricalEngineeringCollegeVol.15.5Sept.20073:2007201211:(19652),,,,©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:;;;;;,,,3,3.1,,,:,,;,,,2:2,:+=++,,,,,;,,,T,3:3,,,,,,3.2,,,,,,,,,,,,,,,,:,,,,:,,,3.3,,,,,,,;,,;50%,50%3.4,,,,,,,,4,,,,,,,,,;,,,20,,,,():[1].[M].:.2002.[2].[J].,2005,(1).[3].[M].:,2000.[4].[J].,1999,().[5].[J].,2005,(1).[6].[J].,2003,(12).80120075©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.