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233 个结果
  • 简介:CascadicmultigridtechniqueformortarWilsonfiniteelementmethodofhomogeneousboundaryvalueplanarlinearelasticityisdescribedandanalyzed.FirstthemortarWilsonfiniteelementmethodforplanarlinearelasticitywillbeanalyzed,andtheerrorestimateunderL2andH1normisoptimal.Thenacascadicmultigridmethodforthemortarfiniteelementdiscreteproblemisdescribed.Suitablegridtrans-feroperatorandsmootheraredevelopedwhichleadtoanoptimalcascadicmultigridmethod.Finally,thecomputationalresultsarepresented.

  • 标签: 平面线性弹性 研钵威尔逊有限元法 多栅技术 弹性力学
  • 简介:Inthepresentpaperweextendthemethodpresentedby0.AxelssonandP.VassilevskicalledAMLPversion(i)ofrecursivelyconstructingpreconditionerforthestiffnessmatrixinthediscretizationofselfadjointsecondorderellipticboundaryvalueproblems.Inourextendedmethodthesystemstobeeliminatedoneachlevelcontainingthemajorblockmatricesofthegivenmatrixcanbesolvedapproximately,whiletheymustbesolvedexactlyintheoriginalmethod.

  • 标签: PRECONDITIONING MULTILEVEL method SCHUR complement.
  • 简介:在这篇论文,我们考虑椭圆形的问题为第二份订单混合了有限元素方法。在最低顺序Brezzi-Douglas-Marini元素的情况中(如果d=2)orBrezzi-Douglas-Duran-Fortin元素(如果d=3)在矩形的平行六面体上,我们证明由合并某些照规则,混合方法系统能作为一个简单、以房间为中心的有限差别方法被写。这导致答案一稀少,positivesemidefinite为未知的数量的线性系统。为一个斜张肌系数,为未知的数量的稀少模式是五个点模板如果d=2,和七如果d=3。为一个一般张肌系数,它是九个点模板,并且十九分别地。是的混合方法实现的应用对的有限差别非等温多相,多,在多孔的媒介的部件流动被介绍。

  • 标签: 有限差分 混合法 误差估计 超收敛 张量系数
  • 简介:when I told students that they could design and draw a picture about the future world on a piece of paper,I can launch a project to solve the problem. (I can do something to change the present situation.)☆The methods used in problem analysis Are the methods used to analyze the problem acceptable,Week 3Teaching notes Students’ handout Diary-keeping ☆The methods used in project implementationIn what way has the project been implemented

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  • 简介:the students of this age like being close to teachers. If they have good will to a certain teaching,the teachers can tell a joke or a byword with English that students can understand roughly according to content of course. Or students show their English conversation practices for three minutes,they can have class more carefully.3.2 Get well ready for teachingIf the teachers want to give a successful English class

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  • 简介:Handlingindustrialpowdersleadstodustemissions.Theseemissionstendtogeneratehumandiseasesorcauseotherenvironmentaleffects.Amultitudeofapparatushasbeendevelopedtoestimatethisdustinessbehaviourofpowders.Twoofthesewell-knownmethodsarepresentedandcomparedwitheachother.Athirdrecentlydevelopedmethodisalsointroduced.

  • 标签: 颗粒特征 污染度 大气环境 健康危害
  • 简介:Anewhigh-ordertime-steppingfiniteelementmethodbaseduponthehigh-ordernumericalintegrationformulaisformulatedforSobolevequations,whosecomputationsconsistofaniterationprocedurecoupledwithasystemoftwoellipticequations.Theoptimalandsuperconvergenceerrorestimatesforthisnewmethodarederivedbothinspaceandintime.Also,aclassofnewerrorestimatesofconvergenceandsuperconvergenceforthetime-continuousfiniteelementmethodisdemonstratedinwhichtherearenotimederivativesoftheexactsolutioninvolved,suchthattheseestimatescanbeboundedbythenormsoftheknowndata.Moreover,someusefula-posteriorierrorestimatorsaregivenonthebasisofthesuperconvergenceestimates.

  • 标签: ERROR ESTIMATES FINITE element SOBOLEV equation
  • 简介:Basicmethodsofpreparingfoodshowgreatsimilaritythroughouttheworld,butEnglishcookingterms②some-timeshavespecialmeanings.Forexample,almostallcultureshavedevisedsomemeans③ofbaking④,thatiscookingbreadorotherfoodinanoven⑤.Boiling⑥,orcookingfoodinwaterorsomeotherliquid,isanotheruniversalpractice⑦.Arelatedprocess,stewing⑧,meanstoboilslowlyorgentlyamixtureusuallyofmeat,veget-ables,andwater.Stillanothercookingprocess,roasting⑨,

  • 标签: BREAD COOKING PREPARING STILL slowly literal
  • 简介:I found lots of students think to study English is useless,20072.1 ProblemThe problem I have in my teaching is that most of my students don’t study English so that they get very bad grades. 2.2 Problem analysisIn my teaching,I designed a research procedure like the follows.I give my questionnaire to all students and ask them to finish it. All of them

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  • 简介:the research to reading comprehension concept become further and further. Choosing a suitable one to improve students’ comprehensive competence become one of the great important contents to English teaching quality improving of reading. In fact while reading,reading stands at the top of the world. Because of this some teachers and scholars begin to research new teaching methods of English reading in order to improve students’ reading comprehension level. Here,it was valued universally and made a great affection about teaching of English reading. But whether it is good for today’ students that is a question. From 1980s training of reading skills and tactics were stressed meanwhile it pay much attention in textual teaching and the accumulation of language knowledge and culture background information. C) Demands for students Reading as it is an extraordinary difficult course of physical and mental so that it demands us not only to recognize the language marks correctly

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  • 简介:Abriefsummaryonandcomprehensiveunderstandingoffuzzyoptimizationispresented.Thissummaryismadeonaspectsoffuzzymodellingandfuzzyoptimization,classificationandformulationforthefuzzyoptimizationproblems,modelsandmethods.Theimportanceofinterpretationoftheproblemandformulationoftheoptimalsolutioninfuzzysenseareemphasizedinthesummaryofthefuzzyoptimization.

  • 标签: 模糊优化 最优解 不确定度 概率论
  • 简介:Anin-depthexplorationhasbeenmadeoftelecommunicationtariffanditsdecisionsupportsystem.Itisthefirstattempttoconductsuchastudybytheintegrateduseofeconometrics,systememulationandsystemdynamics.Apractically-demandedcostmodelofthetelecommunicationtariffdecisionisproposed.Thesystemhasbeenverifiedwithrealdata.

  • 标签: 电信 关税 计量经济学 系统仿真 系统动力学
  • 简介:Inthispaper,theauthorsgivesomeapplicationsofF-uniformlydistributedsequences,whicharesuggestedintheirpreviouspaperunderthesametitle,inexperimen-taldesign,experimentswithmixtures,geometricprobabilityandsimulation.

  • 标签: UNIFORMLY MIXTURES UNIFORM GENERA umber PROBABILITY
  • 简介:Inthispaper,theapplicationofhomotopymethodstotheloadflowmulti-solutionproblemsofpowersystemsisintroduced.BythegeneralizedBernshteintheorem,thecombinatorialnumberC2n^misshowntobetheBKKboundofthenumberofisolatedsolutionsofthepolynomialsystemtransformedfromloadflowequationswithgenericallychosencoefficients.AsaresultofthegeneralBezoutnumber,thenumberofpathsbeingfollowedisreducedsignificantlyinthepracticalloadflowcomputation.Finally,thecompleteP-Vcuresareobtainedbytrackingtheloadflowwithhomotopymethods.

  • 标签: 同伦法 电力系统 Bernshtein定理 负荷流动方程 Bezout数 非线性代数方程
  • 简介:Somewaysofmultilevelrelaxedpreconditioningmatricesforthestiffnessmatrixinthediscretizationofselfadjointsecondorderellipticboundaryvalueproblemsareproposed.Forreason-ableassumptionsoftherelaxedfactorω,smallerrelativeconditionnumbersaregiven.Theoptimalrelaxedfactorωisderived,too.

  • 标签: relaxed PRECONDITIONING MULTILEVEL method RELATIVE CONDITIONING