简介:TherestartedFOMmethodpresentedbySimoncini[7]accordingtothenaturalcollinearityofallresidualsisanefficientmethodforsolvingshiftedsystems,whichgeneratesthesameKrylovsubspacewhentheshiftsarehandledsimultaneously.However,restartingslowsdowntheconvergence.WepresentapracticalmethodforsolvingtheshiftedsystemsbyaddingsomeRitzvectorsintotheKrylovsubspacetoformanaugmentedKrylovsubspace.NumericalexperimentsillustratethattheaugmentedFOMapproach(restartedversion)canconvergemorequicklythantherestartedFOMmethod.
简介:近年来,采用各种不同沟槽栅结构使低压MOSFET功率开关的性能迅速提高。本文分上、下两篇综述了这方面的新发展。上篇重点阐述了降低漏源通态电阻RDS(on)?B7矫娴募际醴⒄梗幌缕氐悴隽私档陀胖礔oM方面的技术发展。