简介:Thisarticlestressestheteacher’sroleinforeignlanguageclassroomteachingaccordingtothemodernteachingtheoryandshowshowtohelpcultivatestudents’abilitytousethelanguageandhowonecanbecomeaqualifiedfacilitator.Thedevelopmentofthefourmodernizations,thesituationofopeningourcountrytotheoutsideworld,theprogressofthetheoryandpracticeofforeignlanguagescienceandtheimprovementintheentrancelevelofnewstudentshavesetanevenhigherdemandonforeignlanguageteachingfornon-majors(nowcalledCollegeEnglish).
简介:Anewbionicapproachispresentedtofindtheoptimaltopologiesofastructurewithtension-onlyorcompression-onlymaterialbasedonboneremodellingtheory.Bytraditionalmethods,thecomputationalcostoftopologyoptimizationofthestructureishighduetomaterialnonlinearity.Toimprovetheefficiencyofoptimization,thereference-intervalwithmaterial-replacementmethodispresented.Inthemethod,firstly,theoptimizationprocessofastructureisconsideredasboneremodellingprocessunderthesameloadingconditions.AreferenceintervalofStrainEnergyDensity(SED),correspondingtothedeadzoneorlazyzoneinbonemechanics,isadoptedtocontroltheupdateofthedesignvariables.Secondly,amaterial-replacementschemeisusedtosimplifytheFiniteElementAnalysis(FEA)ofstructureinoptimization.Intheoperationofmaterial-replacement,theoriginaltension-onlyorcompression-onlymaterialindesigndomainisreplacedwithanewisotropicmaterialandtheEffectiveStrainEnergyDensity(ESED)ofeachelementcanbeobtained.Finally,theupdateofdesignvariablesisdeterminedbycomparingthelocalESEDandthecurrentreferenceintervalofSED,e.g.,theincrementofarelativedensityisnonzeroifthelocalESEDisoutofthecurrentreferenceinterval.Numericalresultsvalidatethemethod.
简介:AnAbleWomanwithOnlyDaughterMs.FengXiuxia,aged46,isamotherwithonlyonedaushterinSanheCity,HebeiProvince.Shewasamongthefirstgrou...
简介: 这个有着优美旋律的团体成立于1992年,JamesMudriczki是主唱,LowellKillen为吉他手,KevinMatthews弹贝司以及AnthonySzuminski作为鼓手.他们的音乐有着浓郁的英伦与自赏派的风格.在曼彻斯特的城市音乐节进行了一系列的演出之后.他们开始为人们所知.到现在为止,这支乐队共出过四张专辑.包括1996年4月的同名专集《Puressence》,1998年8月的《OnlyForever》,2002年出的《PIanetHelpless》以及于今年发行的新专辑《Don'tForgettoremember》.……
简介:GrownupOnlyChildreninShanghaiThereare2.174milion”onechild”familiesinShanghai.Thefirstcohortoftheseonlychildrenispresently23...