简介：摘要本文主要从广泛阅读，注重积累；以日记载体进行简单而有效的语言文字训练；培养学生遣词造句的能力；在作文修改中强化语言文字的训练等几个方面加强学生习作中的语言文字训练。

简介：摘要小学生书写水平差的原因一、超前教育。二、重视不够。三、缺乏写字方面系统指导。解决方法一、养成正确书写习惯。二、重视教师榜样作用。三、取得家长支持。四、激发学生写字兴趣。

简介：WestudytheDirichletproblemassociatedtostronglynonlinearparabolicequationsinvolvingp(x)structureinW_0~(1,x)L~(p(x))(Q).WeprovetheexistenceofweaksolutionsbyapplyingGalerkin'sapproximationmethod.

简介：Inthispaper,wefirstshowtheglobalexistence,uniquenessandregularityofweaksolutionsforthehyperbolicmagnetohydrodynamics(MHD)equationsinR~3.ThenweestablishthatthesolutionswithinitialdatabelongingtoH~m(R~3)∩L~1(R~3)havethefollowingtimedecayrate:║▽~mu(x,t)║~2+║▽~mb(x,t)║~2+║▽~(m+1)u(x,t)║~2+║▽~(m+1)b(x,t)║~2≤c(1+t)~(-3/2-m)forlarget,wherem=0,1.

简介：Inthispaper,wegivetheholomorphicautomorphismgroupofthehigher-dimensionalgeneralizationofThullendomain.

简介：Inthepaper,weconsiderMoran-typesetsE_agivenbysequences{a_k}_(k=1)~∞and{n_k}_(k=1)~∞.weprovethatE_amaybedecomposeintothedisjointunionoflevelsets.Moreover,wedefinethreetypeofequivalencebetweentwodimensionfunctionsassociatedtotwoMorantypesets,respectively,andweclassifyMoran-typesetsbytheseequivalentrelations.

简介：Inthispaper,wemainlyinvestigateentiresolutionsofcomplexdifferentialequationswithcoefficientsinvolvingexponentialfunctions,andobtainthedynamicalpropertiesofthesolutions,theirderivativesandprimitives.Withsomeconditionsoncoefficients,forthesolutions,theirderivativesandtheirprimitives,weconsiderthecommonlimitingdirectionsofJuliasetandtheexistenceofBakerwanderingdomain.

简介：Inthispaper,firstweobtainsomenewfractionalintegralinequalities.Thenusingtheseinequalitiesandfixedpointtheorems,weprovetheexistenceofsolutionsfortwodifferentclassesoffunctionalfractionaldifferentialequations.

简介：Thispaperisconcernedwiththeharmonicequation(P_(■ε)):?u=0,u>0inB~nand?u/?ν+((n-2)/2)u=((n-2)/2)Ku~(n/(n-2)■ε)onS~(n-1)whereB~nistheunitballinR~n,n≥4withEuclideanmetricg_0,?B~n=S~(n-1)isitsboundary,KisafunctiononS~(n-1)andεisasmallpositiveparameter.Weconstructsolutionsofthesubcriticalequation(P_(-ε))whichblowupatonecriticalpointofK.WegivealsoasufficientconditiononthefunctionKtoensurethenonexistenceofsolutionsfor(P_(-ε))whichblowupatonepoint.Finally,weproveanonexistenceresultofsinglepeakedsolutionsforthesupercriticalequation(P_(+ε)).

简介：Inthispaper,weusecontractionmappingprinciple,operator-theoreticapproachandsomeuniformestimatestoestablishlocalsolvabilityoftheparabolic-hyperbolictypechemotaxissystemwithfixedboundaryin1-dimensionaldomain.Inaddition,localsolvabilityofthefreeboundaryproblemisconsideredbystraighteningthefreeboundary.

简介：WestudytheexistenceanduniquenessproblemforthenonhomogeneouspressurelessEulersystemwiththeinitialdensitybeingaRadonmeasure.Ouruniquenessresultisobtainedinthesamespaceastheexistencetheorem.Besides,bycounterexampleweprovethatHuang-Wang'senergyconditionisalsonecessaryforournonhomogeneoussystem.

简介：Inthispaper,usingpseudo-holomorphiccurvemethod,oneprovestheWeinsteinconjectureintheproductP_1×P_2oftwostronglygeometricallyboundedsymplecticmanifoldsundersomeconditionswithP_1.Inparticular,ifNisaclosedmanifoldoranoncompactmanifoldoffinitetopologicaltype,ourresultimpliesthattheWeinsteinconjectureinCP~2×T*Nholds.

简介：以微分中值定理为工具,建立了一类新的排序不等式,而经典的排序不等式仅是它的一个简单特例.

简介：对N为有限情形的秘书问题给出两个简易计算公式.

简介：从教学角度探讨了对一道错解习题的处理,进而由深、广两方面引导学生联系思考,使他们提高学习兴趣.

简介：介绍了莱布尼兹的特征三角形及由此而获得的一些结果,从中我们可以窥见微积分创立的缩影.

简介：首先给出了柱坐标系下拉普拉斯方程的第三边值问题,进而证明了拉普拉斯方程的第三边值问题等价于一个泛函变分的极值问题,最后指出了将拉普拉斯方程第三边值问题转换为等价的泛函变分极值问题的好处.

简介：高阶方阵的特征值的求得,需求解一元高次方程,这往往有一定的难度.本文依据矩阵的初等变换的一些良好性质,介绍两种利用矩阵的初等变换化简方阵的特征值的计算的方法.

简介：介绍了对称矩阵的两特征值问题,并给出了计算公式.

简介：首先探讨了极限ε语言的思维复杂性,接着介绍了种种极限教学方案以及笔者自身的实践,在回顾微积分的历史和比较各种方案后,根据教育学原理提出了一种新的极限教学的组合方案.