简介：Surfaceoriginatedkinkbandsconsistofanimportantfailuremodeforfibre-reinforcedcompo-sitesundercompression.Themechanicalbehaviorofthefibrebridgingkinkbandsisexploredhereininthecontextofthepost-microbucklingtheory.Expressionsofbridgingforceareobtainedfortheentirepostbucklingprocessofthefibresexhibitingweakorstronghardening.Thepostbucklingformulationofthefibresisappliedtoyieldthetoughnessincrementduetotheadvancingkinkbands,andconsequentlyleadstoaquantitativepre-dictionontheoverallcompressivestressstraincurvesofthefibre-reinforcedcomposites.

简介：TwogradesofDyneema~?compositelaminateswiththecommercialdesignationsofHB26andHB50werecutintoblockswithorwithoutanedgecrackandcompressedinthelongitudinalfiberdirection.Thecrackedanduncrackedspecimensshowsimilarcompressiveresponsesincludingfailurepatternandfailureload.ThetwogradesofDyneema~?compositesexhibitsdifferentfailuremodes:adiffuse,sinusoidalbucklingpatternforDyneema~?HB50duetoitsweakmatrixconstituentandakinkbandforDyneema~?HB26duetoitsrelativelystrongermatrixconstituent.AneffectivefiniteelementmodelisusedtosimulatethecollapseofDyneema~?composites,andthesensitivityoflaminatecompressiveresponsestotheoveralleffectiveshearmodulus,interlaminarshearstrength,thicknessandimperfectionangleareinvestigated.Thechangeoffailuremodefromkinkbandtosinusoidalbucklingpatternbydecreasingtheinterlaminarshearstrengthisvalidatedbythefiniteelementanalyses.

简介：Today＇sMissionWhataretwothingsapostmancando？You＇vegotmail!TodayIamlearningtobeapostman.APostmanstartshisdayearlyatthepostoffice.Hereeverypostmanneedstoorganizethemailbyaddress,roadsandpostalcodes.

简介：小李：我要寄这个包。邮局职员：你要保价吗？小李：保一百元吧，我还要两张邮票。邮局职员：你要到邮票窗口买。

简介：小朋友们，今天秋天姐姐要给大家介绍一位新朋友，他的名字叫做Ron.Ron刚刚学习英语，所以很多事情、很多东西都没法用英语表达，这不，在邮局就遇到了麻烦！

简介：SincetheendoftheColdWarintheearly1990s,ithasbecomeincreasinglycommontoconceiveofhistoryintermsof'post-xera'-the'Post-ColdWarEra,''Post-AmericaEra,''Post-WesternEra,'tonameafew.Behindthenumerouserasthatthislabelhasappliedto,wefeelthattheworldtodayisundergoinggreatchangeswhichareentirelydifferentfromtheonesthathave

简介：把一个统计腐烂模型基于结合的一个动态Langevin方程，我们计算僵绳以后的巨大的偶极子回声(GDR)的变化有僵绳以后的磨擦力量的重原子核240Cf，246Cf，252Cf，和240U的光线复合()。我们发现僵绳以后的排放到的敏感与增加系统的neutron-to-proton比率(N/Z)更加减少。而且为240U，排放对不再敏感。我们建议那精确地由测量切断前GDR光线复合获得僵绳以后的磨擦强度的信息，与低N/Z在各种各样的复合系统之中选择那些是最佳的。

简介：Theinductionofinfertilityinmalesofseveralspeciesthroughepididymalinterferenceismoredifficulttoachievebyreductionoftheamountsofepididymalsecretions(ega-glucosidase,L-camifine)orimmunologicalinterferencewithsecretedproteins(egD/E,P34H,P26h)thanbydirectactionsofdrugsonspermfunction(eginhibitionofglyceraldehyde3-phosphatedehydrogenasebychloro-compounds).Thelatterapproachholdspromiseformankindashumanspelmaresusceptibletoglycolyticinhibition.Futurecontraceptivedevelopmentsmayarisefromproductionoftargetedinhibitors,researchonthedisplacementofspermproteinsintheepididymisandinterferencewithspermplasmamembraneionchannels.(As/anJAndrof1999Jun;1:29-36)

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简介：TheenvironmentofthepostalindustryinChinahasexperiencedtremendouschangesinthepastfewyears.TheenvironmentalchangeshavesomeeffectsontheelementsthatdecidetheservicestructureofChinaPost.Insuchcontext,thecurrentservicestructureofChinaPostneedssomeimprovementstoadaptitselftothechangingenvironment.AimingattheoptimizationoftheservicestructureofChinaPost,thispaperreviewsthelawofitsdevelopmentandmakesananalysisofitscurrentcharacteristicsandtheexistingproblems.

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简介：TheresearchworkinRef.[1]receivedsupportfromtheSurgicalCenterHenriMondor,UniversityParis12,France.Therefore,wewouldliketopublishthefollowingacknowledgement:ThisworkwaswithintheframeworkofanErasmusstudentmobilityattheHigherInstituteofBioScience,UniversityParis12,France,whichenabledtheinternationalcollaborationwithFacultyofMedicalBioengineering,UniversityofIasi,Romania.Theexperimentalmeasurementsandpartialprocessingofthedatapresentedinthisarticle

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简介：本单元知识网络同步讲解SectionA1.Isthereahospitalnearhere?这附近有医院吗?这是一个therebe句型。结构:therebe+sb/sth+地点,表示在某地有某人或某物(there是引导词没有词义;be是谓语动词;某人/物是主语,地点作状语,多为介词短语)。如:

简介：ThearticlebrieflyintroducesthethreestagesthatChinaPostexperiencedandthecircumstancesofthefundamentalnetworkconstruction,focusingonintroducingthethreesortsofservicesbasedonpostalcomprehensivecomputernetwork'sapplicablesoftwaresystem:postalfinancialservice;traditionalserviceelectrified;electronicpostalservice.FinallythethinkingforfutureChinaPost'sinformationizingconstructingisputforward.

简介：UnitedNationsSecretaryGeneralKofiA.AnnanisgoingtocompletehissecondtermofofficebyDecember31thisyear.Althoughthedayissometimeaway,competitionforthepositionofthenextsecretarygeneralhasunfoldedwithinandoutsidetheUnitedNations.Giventheimportanceofthepostwhichhasabearingontheorientationandfuturedevelopmentoftheorganization,andduetothedifferentapproachesandpoliciestakenbythepartiesconcerned,thereisboundtobeasharpcontentionamongthevariousparties.

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简介：同步讲解SectionA1.Isthereahospitalnearhere?这附近有医院吗?这是一个therebe句型。结构:therebe+sb/sth+地点,表示在某地有某人或某物(there是引导词没有词义;be是谓语动词;某人/物是主语,地点作状语,多为介词短语)。如:Thereisabankintheneighborhood.附近有一家银行。注意:(1)therebe句型的谓语动词be在人称和数上应与后面的第一个名词保持一致。如果后面的名词是可数名词单数