简介:NewalgorithmsbasedonartificialneuralnetworkmodelsarepresentedforcubicNURBScurveandsurfaceinterpolation.Whenallthknotspansareidentical,theNURBScurveinterpolationproceduredegeneratesintothatofuniformrationalB-splinecurves.Ifalltheweightsofdatapointsareidentical,thentheNURBScurveinterpolationproceduredegeneratesintotheintegralB-splinecurveinterpolation.
简介:ThispaperproposesandevaluatestwoimprovedPetrinet(PN)-basedhybridsearchstrategiesandtheirapplicationstoflexiblemanufacturingsystem(FMS)scheduling.Thealgorithmsproposedinsomepreviouspapers,whichcombinePNsimulationcapabilitieswithA*heuristicsearchwithinthePNreachabilitygraph,maynotfindanoptimumsolutionevenwithanadmissibleheuristicfunction.Toremedythedefectsanimprovedheuristicsearchstrategyisproposed,whichadoptsadifferentmethodforselectingthepromisingmarkingsandreservestheadmissibilityofthealgorithm.Tospeedupthesearchprocess,anotheralgorithmisalsoproposedwhichinvokesfasterterminationconditionsandstillguaranteesthatthesolutionfoundisoptimum.TheschedulingresultsarecomparedthroughasimpleFMSbetweenouralgorithmsandthepreviousmethods.Theyarealsoappliedandevaluatedinasetofrandomly-generatedFMSswithsuchcharacteristicsasmultipleresourcesandalternativeroutes.
简介:近日.方正科技集团股份有限公司推出了“圆明MRl00服务器”。该新品为1U机架式双路“至强”服务器,采用双通道ECCRegisteredDDR333内存,可实现内存在线热备,提高服务效率。其EM64T技术支持64位内存寻址,可以满足部分应用对大容量内存访问的需求。同时,它也是一款为网络游戏量身定做的服务器。