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:Athreedimensionalbounce-averagedFokker-Planck(FP)numericalcodehasbeennewlydevelopedbasedonfullyimplicititerativesolvingmethod,andrelativisticeffectisalsoincludedinthecode.Thecodehasbeentestedagainstvariousbenchmarkcases:OhmicconductivityinthepresenceofweakOhmicelectricfield,runawaylossesofelectronsinthepresenceofstrongOhmicelectricfield,lowerhybridcurrentdriveandelectroncyclotroncurrentdriveviatwo-orthree-dimensionalsimulation.Allthetestcasesrunfastandcorrectlyduringcalculations.Asaresult,thecodeprovidesasetofpowerfultoolsforstudyingradiofrequencywaveheatingandcurrentdriveintokamakplasmas.
简介:2011年3月15日,国家质量监督检验检疫总局对外公布了电磁炉及厨房机械抽查结果,共有7种产品质量不合格。
简介:根据国家质量监督检验检疫总局近日通报的单元式空气调节机产品质量国家监督抽查结果,1款产品未达到最低的5级能效等级要求。