简介：Theobjectiveofthisresearchistodeterminetheeffectearthquakeshaveontheperformanceoftransportationnetworksystems.Todothis,bridgefragilitycurves,expressedasafunctionofpeakgroundacceleration(PGA)andpeakgroundvelocity(PGV),weredeveloped.Networkdamagewasevaluatedunderthe1994Northridgeearthquakeandscenarioearthquakes.Aprobabilisticmodelwasdevelopedtodeterminetheeffectofrepairofbridgedamageontheimprovementofthenetworkperformanceasdayspassedaftertheevent.Asanexample,thesystemperformancedegradationmeasuredintermsofanindex,"DriversDelay,"iscalculatedfortheLosAngelesareatransportationsystem,andlossesduetoDriversDelaywithandwithoutretrofitwereestimated.

简介：TransparentYAG(yttriumaluminumgarnet)ceramicswerefabricatedbysolid-statereactionmethod.Effectofadditive(tetraethylorthosilicate,TEOS)onmicrostructureofYAGceramicswasinvestigated.IftheadditionofTEOSismorethan3%(massfraction),largeamountofliquidphasecanbeyieldedatgrainboundaries,resultingintheformationofsecondphaseparticlesatgrainboundaries.Iftheadditionislessthan0.05%(massfraction),poresareentrappedinthegrains.Thesuitableamountis0.5%(massfraction).AfullytransparentYAGceramicwasfabricatedbyvacuumsinteringat1700℃for5h.OpticaltransmittanceoftheYAGceramicis63%inthevisiblelightwavelengthsand70%intheinfraredwavelengths.

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简介：目的：观察针刺治疗黄褐斑的疗效。方法：将90例患者随机分为治疗组和对照组，每组各45例。其中，治疗组又辨证分成3型，予针刺治疗。对照组予维生素C和维生素E治疗。结果：治疗组和对照组有效率分别为93.3％和73．3％(P<0．05)，而治疗组内各型疗效无差异(P>0．05)。结论：针刺治疗各型黄竭斑均有明显的效果。

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简介：Inthepresentwork,aparametricnumericalstudyisconductedinordertoassesstheeffectofairfoilcamberingontheaerodynamicperformanceofrigidheavingairfoils.TheincompressibleNavier-Stokesequationsaresolvedintheirvelocity-pressureformulationusingasecond-orderaccurateinspaceandtimefinite-differencescheme.Totackletheproblemofmovingboundaries,thegoverningequationsaresolvedonoverlappingstructuredgrids.ThenumericalsimulationsareperformedataReynoldsnumberofRe=1100andatdifferentvaluesofStrouhalnumberandreducedfrequency.Theresultsobtainedshowthattheairfoilcamberinggeometricparameterhasastronginfluenceontheaverageliftcoefficient,whileithasasmallerimpactontheaveragethrustcoefficientandpropulsiveefficiencyofheavingairfoils.

简介：—Inthispaper,anonlinearmodelispresentedtodescribewavetransformationinshallowwat-erwiththezero-vorticityequationofwave-numbervectorandenergyconservationequation.Thenonlineareffectduetoanempiricaldispersionrelation(byHedges)iscomparedwiththatofDalrymple＇sdispersionrelation.Themodelistestedagainstthelaboratorymeasurementsforthecaseofasubmergedellipticalshoalonaslopebeach,wherebothrefractionanddiffractionaresignificant.Thecomputationre-sults,comparedwiththoseobtainedthroughlineardispersionrelation.showthatthenonlineareffectofwavetransformationinshallowwaterisimportant.Andtheempiricaldispersionrelationissuitableforre-searchingthenonlinearityofwaveinshallowwater.

简介：Objective:Toevaluatetheassociationbetweenobesityandtheriskofcolorectalcancer.Methods:331patientswithrectalcancerand175withcoloncancerwhoacceptedsurgicaloperationatBeijingCancerHospitalduring1995and2002wereenrolled.Datawerecollectedbyreviewingthepathologymaterialsandhospitalrecords.258healthypeoplewhoacceptedhealthexaminationatBeijingCancerHospitalduring2000and2002werealsoenrolledascontrol.Dataofheight,weightandgenderatthetimeofexaminationwerealsocollected.Obesitywasestimatedbybodymassindex(BMI),computedasweightinkilogramsdividedbyheightinmeterssquared(kg/m2).ThedegreeofobesitywascomparedbetweenthetwogroupsusingBMI(18.5,24-27.9and(28(kg/m2)asthecut-offpointsforunderweight,overweightandobesity.Associationswithobesitywereestimatedbyoddsratios(ORs)and95%confidenceintervals(CIs).AllORswereadjustedforageandsex.Results:Obesitywassignificantlyprevalentinfemalepatientswithrectalcancer.AllthepatientswithcoloncancershowedlowerlevelofBMIthancontrolsubjects.TheORsforrectalcancerrosewithincreasingBMIinwomen.Meanwhile,theORsforcoloncancerdroppedwithincreasingBMIinbothmenandwomen.Obesitywasanindependentriskfactorforrectalcancer,butnotanindependentriskfactorforcoloncancer.Conclusion:Rectalcancerandcoloncancermayhavedifferentbiologicalbehavior.Obesewomenhaverelativelyhighriskforrectalcancer.

简介：AFokker-Planckstudyiscarriedoutfortokamaklowerhybridcurrentdrivewithconsideringthewavesentoftrappingabsorptioninthepreeffectsituation.ThisFokker-PlanckcodeisdevelopedbasedonFASTFP,andsuitableforvariousauxiliaryheatingandcurrentdrivesituationsTheenergylossmechanismthroughanomaloustransportismodeledbyusingasuitablelosstenn.Intheheatingphase,theelectrondistributiondeviatesfromtheMaxwellianclearly,

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简介：散开的可伸缩在固定联合盒子中基于pomeron环方程被学习。在Y？YDS，gluon数字变化变得重要，几何可伸缩被散开的可伸缩代替。在散开的可伸缩政体，深无弹性的散布(阴间的神)全部的散布剖面图是单个可变ln的一个函数。我们证明深无弹性的散布试验性的数据在一条单个曲线上躺着，它似乎显示散开的可伸缩现象学的存在在深无弹性的散布。

简介：Externalmagneticfieldincreasesthephoto-inducedpolymerizationrateofstyrenemicroemulsion.Thetypeofphotoinitiatorplaysanimportantrole.Thephotoinitiators,usedaredimethoxyphenylacetophenone(DMPA),1-hydroxycyclohexylphenylketone(Irgacure184)anddimethylhydroxyacetophenone(Darocur1173).Nomagneticeffectwasobservedbyusingdibenzylketone(DBK)asphotoinitiator.Themolecularweightofthepolymerisslightlyaffectedbymagneticfield.Theinfluenceoftemperaturehasalsobeeninvestigated.

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简介：产品散开指以后的需求依赖于早出售的现象。调查卖策略的公司进展怎么被产品散开的效果影响，我们考虑一个独占者卖主在在二个时期上近视、战略的消费者包括的一个市场卖一个时髦产品(即，卖季节的进展和常规卖季节)。为我们发现那的线性产品散开效果，当产品散开的效果是积极的时，卖主可以设置一个极其高的进展售价劝诱战略消费者在常规卖季节购买，它是违反直觉的。而且，为卖主的最佳的获得数量可以在战略消费者的数量在产品散开和减少的否定效果增加。当我们扩大我们的模型认为凹面二次时产品散开效果然而，最佳的获得数量是在战略消费者的数量的凹面。数字研究进一步被介绍讨论经理的卓见。

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简介：什么时候热带气旋(此后作为TC参考了)在海洋上，表面磨擦在TC的发展起一个双作用。从水蒸汽供应的观点，摩擦集中并且Ekman抽为组织积云传送对流提供潮湿的来源并且对TC的旋转起来慈悲。在另一方面，表面磨擦导致阻碍TC的增强的动能的驱散。它角色在TC的发展中的阶段是主导的是一个争论问题。在现在的工作，TC的生长上的表面磨擦的影响由进行与不同气旋的骚乱初始化的数字实验的二个集合详细是re-examined。结果显示因为TC的固有的复杂性，TC的进化上的表面磨擦的影响不能简单地被归结到积极或否定。在TC以一个温暖的核心从一个低级旋涡开始的情况中，表面磨擦和结果的垂直运动由加速对流可得到的势能(披肩)的逐渐增加并且保证潮湿供应并且上升空气包裹在TC的早发展中的阶段做重要贡献到传送对流。这效果是那么突出的它统治导致磨擦的驱散并且在TC的旋转起来使表面磨擦成为一个facilitative因素。然而，为从中央规模形成的TC，对流旋涡(MCV)在一个长持续的中央孵化了规模对流系统(MCS)，起始的域，和特别低级湿度和冷核心，启用传送对流的前提(即，有条件的不稳定性，潮湿，并且上升)，由表面磨擦导致了甚至没有抽的边界层的帮助，容易被完成。因此，表面磨擦上的TC的发展的信赖不象源于一个低级旋涡那一样重。在通过为传送对流便于有利条件认识到的TC的发展的表面磨擦的积极效果被导致磨擦的驱散将近抵销。然而，当SST在后者盒子中被提高，状况可以被改变，并且不同发展速度可以有或没有考虑的表面磨擦出现在模型TC之间。简言之，由于TC开发是的事实，复杂进程由象起始的不安那样的许多因素影响了，SST，等等，到TC的增强的表面磨擦的重要性可以从大小写极其变化到大

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