简介:ToovercomethedeficienciesoftheexistingVerhulstGM(1,1)model,basedontheexistinggreytheory,anon-equal-intervaldirectoptimumVerhulstGM(1,1)modelisbuiltwhichchoosesamodifiedn-thcomponentx(n)ofX(0)asthestartingconditionofthegreydifferentialmodel.Itoptimizesamodifiedβvalueandthebackgroundvalue,andtakestwotimesfittingoptimization.Thenewmodelextendsequalintervalstonon-equal-intervalsandissuitableforgeneraldatamodellingandestimatingparameters...
简介:研究虚拟数字仪表的软件设计思想,并利用ActiveX控件技术开发虚拟数字仪表控件,使用户可以灵活地设置仪表的显示位数.