简介:1.IntroductionInthispaperweconsiderCauchyproblemforaclassofnonhomogeneousNavier-Stokesequationsintheinfinitecylinderwith.Givensatisfyinginthedistributionsensediv,weseekasolutionvectorandapressurefunctionP(t,x)suchthatwhereisanonlinearvector-valuedfun...
简介:银灰,典雅、金属,三大思想圈定了一款笔记本电脑,它像是商务的天使,也是休闲的玩伴。
简介:Inthispaper,asimplebutinherentrelationbetweentheL-integralandtheBueeknerworkconjugateintegralisprovedforcrackproblemsinisotropic,anisotropic,anddissimilarmateri-als,respectively.Itisfoundthat,intheabove-mentionedthreecases,theL-integral,fromthemath-ematicalpointofviewaswellasinprinciple,arisesfromBetti’sreciprocaltheorem.ThismeansthattheBuecknerworkconjugateintegralisamoregeneralpath-independentintegralthantheotherssinceanyotherpath-independentintegralscouldbederivedbyusin8theBuecknerintegralwhilechoosingadifferentsubsidiarystress-displacementfield.
简介:BriefIntroductiontoELTECS-Chi-LELTECS-Chi-LisaBritishCouncilChinainternetdiscussiongroupforChineseELT(Englishlanguageteaching)professionalswithaninterestintheteachingofEnglishasaforeignlanguage.LaunchedinForeignLanguageTeaching&ResearchPressbyHelenaKennedyQC,ChairoftheBritishCouncilon9thOctober1998,thenetworkhasnowover150subscribers,amongwhommorethan40arefromtheUK,Belgium,Japanandothercountries.
简介:L'enseignementdufrancaisniveauⅢYANGHaiyanDans1'enseignementdufrancaisniveauⅢ,nonsavonsprisunsoinparticulieraux3aspects:lechoi...
简介:RosalindBurford:IntroductiontoELTECS-Chi-LIamdelightedtowelcomeyoutoELTECS-Chi-L,anelectronicdiscussionforumforELTprofessionalsinChina.Bytheyear2,000itisestimatedthatonebillionpeoplewillbelearningEnglish.Itisthemainlanguageofbooks,newspapers,internationalbusiness,science,technology,travel,diplomacy,sport,musicandsoon.WhenEnglishissomuchindemanditmakessensetoshareideaswithcolleagues.That’swhytheBritishCouncildecidedtoestablishaninternationalEnglishLanguageContactsScheme-EL-TECSforshort.
简介:Aditerpenoid,neostellerin,wasisolatedfromtherootsofStellerachamaejasmeLtogetherwith4knowncompoundsidentifiedasβ-sitosterol,scopoletin,umbelliferoneanddaucosterol.Thestructureofneostellerin,whichwaselucidatedbyNMR,especially2DNMRanalysis,wasdifferentfromotherdaphnanetypediterpenesisolatedfromthisplant.