学科分类
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222 个结果
  • 简介:Mr.ZhangZhengying,thedirectorofXi’anQimingEnergy-SavingMaterialPlanthasdevelopedaseriesofRE-containingthermalinsulationmateri-alhavingthetrademarkofFBF.ThematerialisconsideredbytheChinaNationalPatentBureautobethebestofitskindavailableinChina.TheFBFmaterialincorporatesthefollowingstrongpointstogether:thermalinsulation,heat-re-

  • 标签: INSULATION DIRECTOR BUREAU PATENT
  • 简介:针灸是在中国的普通处理方法之一,并且它的临床的有效性现在在许多国家被接受了或它全球被扩展了并且作为一种医药形式适用。在中国,临床的实践证明了针灸的指示在神经系统,内分泌系统,免疫系统,循环系统,消化系统,呼吸系统,泌尿系统,生殖系统,血系统,感觉系统和马达包括超过300混乱系统,并且指示逐渐地与针灸的临床的应用程序的开发被创造。自从1949,中国把大重要性纳入了中国药原因的发展,投资了大量钱资助中国药,并且完成了多产的结果,到,作为结果在世界上维持针灸的主角。前面的研究证明了那针灸在临床的实践是有效的,并且它由象nerve-endocrine-im-munenerwork那样的许多过程在双向规定工作,它无疑显示出针灸效果的客观性。上面的研究成就越过世界引起了广泛的注意。

  • 标签: 材料 针灸治疗 临床 中医
  • 简介:Ithasbeenwellrecognizedthat,duetoanisotropicpackingstructureofgranularmaterial,thetruestressinaspecimenisdifferentfromtheappliedstress.However,veryfewresearcheffortshavebeenfocusedonquantifyingtherelationshipbetweenthetruestressandappliedstress.Inthispaper,wederiveanexplicitrelationshipamongappliedstresstensor,material-fabrictensor,andforce-fabrictensor;andweproposearelationshipbetweenthetruestresstensorandtheappliedstresstensor.Thevalidityofthisderivedrelationshipisexaminedbyusingthediscreteelementsimulationresultsforgranularmaterialunderbiaxialandtriaxialloadingconditions.

  • 标签: 粒状材料 应力和 面料 应力张量 包装结构 各向异性
  • 简介:EmeiSemiconductorMaterialFactoryincludingEmeiResearchInstituteofSemiconductorMaterialisanimportantcomplexunitcombiningfactorywithinsti-tutespecializedinproduction,trial-produc-tionandscientificresearchofsemiconductormaterialsinChina.Itisnotonlyakeyen-terpriseinChinaNationalNonferrousMet-alsIndustryCorporation,butalsoanim-

  • 标签: specialized FACTORY SENIOR institute WELCOME hundreds
  • 简介:Theproblemconsideredhereistheresponseofanon-homogeneouscompositematerialcontainingsomecrackssubjectedtodynamicloading.Itisassumedthatthecompositematerialisor-thotropicandallthematerialpropertiesdependonlyonthecoordinatey(alongthethicknessdirection).Intheanalysis,theelasticregionisdividedintoanumberofpliesofinfinitelength.Thematerialpropertiesaretakentobeconstantsforeachply.ByutilizingtheLaplacetransformandFouriertransformtechnique,thegeneralsolutionsforpliesarederived.Thesingularintegralequa-tionsoftheentireelasticregionareobtainedandsolvedbythevirtualdisplacementprinciple.Attentionisfocusedonthetime-dependentfullfieldsolutionsofstressintensityfactor(SIF)andstrainenergyreleaserate.Asanumericalillustration,thedynamicstressintensityfactorofasubstrate\functionallygradedfilmstructurewithtwocracksundersuddenlyappliedforcesoncracksfacearepresentedforvariousmaterialnon-homogeneityparameters.

  • 标签: NON-HOMOGENEOUS composite MATERIAL multi-cracks singular integral
  • 简介:Theyear2001wasoneofgreathistoricalsignificanceforChinainitsreformandopeningup.ChinawasadmittedtotheWTO;itsuccessfullyhostedAPECleaderssummit;anditwonthebidforhostingthe2008SummerOlympics.Thehumanrightsconditionsdevelopedsidebysidewiththedevelopmentofthewholesociety,leavingusadeepimpression.Wehavecollectedagroupofarticles,whichreview,fromdifferentangles,thechangesinthedevelopmentofhumanrightsinthecountry.

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  • 简介:这篇论文在有限厚度的一次非同类的材料旅行认为一架反飞机是动人的快克。shear模量和长带的集体密度为平衡方程为有分析答案的功能的形式的一个班被考虑。这个问题借助于单个不可分的方程技术被解决。裂缝尖端附近的压力地被获得。结果被阴谋在裂缝尖端域上显示出材料非同质和快克移动速度的效果。裂缝分叉行为也被讨论。纸指出一个适当破裂标准的使用为在非同类的材料学习一个动人的裂缝的稳定性是必要的。预言不稳定的裂缝生长是否将被提高或延迟,强烈依赖于使用的破裂标准的类型。基于分析,看起来最大值“反飞机砍”在裂缝尖端附近的应力是为在非同类的材料的动人的裂缝的一个合适的失败标准。

  • 标签: 非均匀材料 断裂力学 移动裂纹 平衡方程
  • 简介:ThelowresistancePTCceramicthermistormaterialwithexcellenteleectricalpropertiesaresuccessfullyfabricatedbyrawmaterialsatindustrialrangemadeinourcountryonthestudyofitscompositionexpressionandfabricationprocessbyusingtheadditionofNb,La,Y,Ta,microstructureregulatorBNandASTLphase.Thecompositionanditsfabricationmethodarestudied.TherelationofelectricalpropertiesofthePTCceramicmaterialtoitscompositionexpressionanditsrelatedelectricalpropertiesarediscussed.

  • 标签: 半导体陶瓷 低电阻 PTC 正温度系数 热敏电阻
  • 简介:INTRODUCTIONAsEnglishteachers,wehavedevotedalotoftimetotheteachingoflisteningcomprehensionusingradiobroadcasts.WebeganbyusingVOAnewsinspecialEnglishwithfreshmenandamixtureofnewsinspecialEnglishandstandardnewsbroadcastswithsophomores.LaterBBCnewswasused.Weaccumulatedaconsiderableamountofexperienceanddidsomeresearchintothedesignoflisteningcomprehensionexercises.Thisarticlediscusseshowlisteningabilitymaybeimprovedbyusingsuchbroadcasts.

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  • 简介:Tobettersimulatemulti-phaseinteractionsinvolvingfailureevolution,thematerialpointmethod(MPM)hasevolvedforalmosttwentyyears.Recently,aparticle-basedmultiscalesimulationprocedureisbeingdeveloped,withintheframeworkoftheMPM,todescribethedetonationprocessofenergeticnano-compositesfrommoleculartocontinuumlevelsothatamultiscaleequationofstatecouldbeformulated.Inthisletter,amultiscaleMPMisproposedviabothhierarchicalandconcurrentschemestosimulatetheimpactresponsebetweentwomicrorodswithdifferentnanostructures.Preliminaryresultsarepresentedtoillustratethatatransitionregionisnotrequiredbetweendifferentspatialscaleswiththeproposedapproach.

  • 标签: 纳米复合材料 模拟程序 多尺度 MPM 相互作用 物质点法