简介:利用系统运动方程的线性化方程及其伴随方程的相互关系,以及散度表达式在全Euler算子作用下为零这一特性,通过引进守恒量乘子来求得运动系统的守恒量.该方法不需要运动系统的Lagrange函数.以Fokker-Planck方程为例,利用该方法可以很容易给出它的无穷多守恒量.
简介:Thegeneralizedone-dimensionalFokker-Planckequationisanalyzedviapotentialsymmetrymethodandtheinvariantsolutionsunderpotentialsymmetriesareobtained.Amongthosesolutions,somearenewandfirstreported.
简介:Inthisstudy,weaddasubroutinefordescribingtheelectroncyclotronresonantheatingcalculationtotheFokker-Planckcode.Byanalyzingthewave-particleresonanceconditionintokamakplasmaandthefastmotionofelectronsalongmagneticfieldlines,suitablequasi-lineardiffusioncoefficientsaregiven.
简介:EvaluatingreflactorycoatingsofPUCBbinders:apracticalapproach;Evaluationofstructuralandhigh-temperaturemagnesiumalloys;FATIGUEPROPERTIESOFDIE-CASTMAGNESIUMALLOYAM60B;GrainrefinementofAl-Sialloy(A356)bymeltthermaltreatment;Impactofscrapuseonthepropertiesofhot-worktoolsteels;MAGNESIUMDIECASTINGALLOYAJ62xWITHSUPERIORCREEPRESISTANCE,DUCTILITYANDDIECASTABILITY。
简介:Productionofmassivecastingsfromcomplexlyalloyedhigh-wear-resistanceiron,Quiescentfillingappliedtoinvestmentcastings,ReducingSurfaceDefectsWithProperVeinReduction,Requirementsoncylinderheadalloysforhighpowerengines,SiCvs.75%FeSi:comparingpre-inoculationeffects,TheEffectsofIntensificationPressure,GateVelocity&IntermediateShotVelocityontheInternalQualityofAluminumDieCastings,Tilt-PourGating-KeyParameters.