简介：TheDepUty(dependenciesutility)canbeclassifiedasaprojectandprocessmanagementtool.ThemaingoalofDepUtyistoassistbymeansofsourcecodeanalysisandgraphicalrepresentationusingUML,inunderstandingdependenciesofsub-systemsandpackagesinCMSobjectOrientedsoftware,tounderstandarchitecturealstructure,andtoschedulecodereleaseinmodularisedintegration.Italsoallowsanew-comertomoreeasilyunderstandtheglobalstructure,ofCMSsoftware,andtovoidcirculardependenciesup-frontorre-factorthecode,incaseitwasalreadytooclosetotheedgeofnon-maintainability.WewilldiscussthevariousviewsDepUtyprovidestoanalysepackagedependenciesandillustrateboththemetricsandstylecheckingfacilitiesitprovides.

简介：MeisymmetryandMeiconservedquantityforanon-holonomicsystemofnon-Chetaev'stypewithunilateralconstraintsintheNielsenstylearestudied.Thedifferentialequationsofmotionforthesystemaboveareestablished.ThedefinitionandthecriteriaofMeisymmetry,conditions,andexpressionsofMeiconservedquantitydeduceddirectlyfromtheMeisymmetryaregiven.Anexampleisgiventoillustratetheapplicationoftheresults.