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简介：Dropshaftsareverticalstructureswidelyusedinurbandrainagesystemsandbuildingsforwatertransportation.Inthispaper,aphysicalmodelstudywasconductedtoinvestigatetheairentrainmentinthedropshaftundervariousflowregimeswithandwithoutairventilation.Observedfromtheexperiments,theairentrainmentmechanismsvariedwiththewaterflowregimesinthedropshaft.Whentherewasnowaterplugformedinthedropshaft,aircouldbesupplieddirectlyfromdownstream.Oncethewaterplugwasformed,whilewithoutventing,theairwasreplenishedonlyfromdownstreamintermittentlyandthenintheformoflargeairbubbletravelingupwardstotheairspaceatthetop;whilewithventing,airwasmainlyreplenishedfromthedropshafttopandnolargeairbubblewasobserved.Theexperimentalresultsalsoshowedthattheamountofentrainedairinthedropshaftwithventingwasgreaterthanthatwithoutventing.

简介：Appliedstatisticiansareoftenconfrontedwithstatisticalinferenceproblemsdealingwithsituationsinwhichthereappeartobenodata,ordataofonlylimitedusefulness.Forexample,whenattemptingtofindaconfidenceintervalforabinomialproportion,thesamplemaycontainnosuccesses.Suchascenariocouldbeencounteredwhenattemptingtoestimatetheincidenceofanextremelyraresideeffectassociatedwiththeadministrationofanewlydevelopeddrug.Inthisarticle,weuseexamplesforourexperiencesworkingwithscientificinvestigatorsanddescribeseveralscenariosinwhichthereappearedtobenousefuldata,ordataofonlylimitedusefulness.Wedescribethemethodswepreferforanalyzingthedatainthesesituationsandillustratetheirapplicationusingtheactualdatafromtheinvestigationsweparticipatedin.

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简介：Inthisstudy,particleimagevelocimetrywasappliedtoinvestigateflowfieldsofwormlikemicelle(WLM)fluidsinamixingtankequippedwithafour-blade,down-pumping,pitchedbladeturbine.First,therheologyofWLMfluidswasinvestigated,andtheCarreaumodelwasutilizedtodescribetheirapparentviscosity.Then,theeffectsoftherotationspeedsandrheologicalpropertiesontheflowfieldswerestudiedusingdifferentWLMfluidsatdifferentrotationspeeds.TheresultsrevealedthatwithincreasingReynoldsnumber,thedischargeangledecreasesandthecarvensizeincreases.Furthermore,elasticeffectsofWLMfluidsleadtoamorecurvedflowandasmallercarven.

简介：Objective:Theaimofthisstudywastoinvestigatethefeasibilityofusingultrasonicscalpelcombinedwithvascularclipinparametrialmanagement,calledlimitedenergyparametrialresection/dissection(LEPRD),inlaparoscopicnerveplane-sparingradicalhysterectomy(NPSRH),amodifiednerve-sparingradicalhysterectomy(NSRH);andtoevaluateitseffectivenessinpelvicautonomicnervepreservation.Methods:FromJuly2012toJanuary2016,257consecutivepatientswithstageIB1toIIA2cervicalcancerwhounderwentNPSRHwereincludedinthisstudy.Patientsweredividedintothreecohortsaccordingtothedifferentparametrialresectionmodality.Theclinical,pathologicalandsurgery-relatedparameterswerecomparedbetweenthethreegroups.Short-andlong-termpostoperativebladderfunctionswereevaluated.Results:LEPRDwasattemptedin94patients,andwassuccessfulin65(69.1%)patients(LEPRDgroup).Theremaining29(30.9%)patientsrequiredbipolarcoagulationafterfailureofvascularclipping(combinedmodalitygroup).Routinebipolarcauterywasusedintheother163patientsduringtheparametrialresection(bipolargroup).ThebloodlossintheLEPRDgroupwassignificantlylowerthanthoseintheothertwogroups(P<0.001).TherateofsuccessfulFoleyremovalonpostoperativeday7wassignificantlyhigherintheLEPRDgroupthaninthebipolargroup(P=0.022).TheincidenceofchronicvoidingdysfunctionwassignificantlylowerintheLEPRDgroupthaninthebipolargroup(P=0.019).Conclusions:ItisfeasibletoperformLEPRDinNPSRHforcervicalcancers.Thiskindoflimitedenergysurgicaltechniqueisassociatedwithlessbloodloss,andleadstoimprovedpostoperativebladderfunction.

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简介：Zincwasrecentlysuggestedtobeapotentialcandidatematerialfordegradablecoronaryarterystent.Thecorrosionbehaviorofpurezincexposedtor-SBFupto336hwasinvestigatedbyelectrochemicalmeasurementsandimmersiontests.Themorphologyandchemicalcompositesofthecorrosionproductswereinvestigatedbyscanningelectronmicroscope,grazing-incidenceX-raydiffraction,X-rayphotoelectronspectroscopyandFouriertransforminfraredspectrometer.Theresultsdemonstratethattheinitialcorrosionproductsonthepurezincmainlyconsistofzincoxide/hydroxideandzinc/calciumphosphatecompounds.ThepureZnencountersuniformcorrosionwithanestimatedcorrosionrateof0.02-0.07mmy^-1duringtheimmersion,whichsuggeststhesuitabilityofpureZnforbiomedicalapplications.

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简介：数字模拟基于计算液体动力学(CFD)是为在FSW期间调查内在的热机械的条件的份量上的一条有用途径，例如温度地和材料变丑地。在FSW的CFD模拟的关键问题之一是摩擦边界条件的使用，它在数字模型代表在焊接工具和细工品之间的磨擦。在这研究，三维的数字模拟被进行在AA2024的FSW期间分析热转移和塑料变丑行为。为比较目的，边界速度(BV)模型和边界砍压力(BSS)模特儿被雇用以便在在FSW预言温度和材料变丑估计他们的表演。注意不同边界条件在材料变丑上在温度，而是相当不同的预言上产出类似的预言有趣。数字预言与试验性的结果相比。当由BV模型和试验性的大小的预言之间有大差别时，由BSS模型的预言的变丑地区几何学与试验性的结果一致。BSS模型在变丑地区几何学上产出更合理的预言的事实被归因于它的能力自动地在工具/细工品接口调整接触状态。在温度地和材料变丑地上基于有利预言，BSS模型被建议比BV模型在FSW的数字模拟有更好的表演。

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简介：这份报纸在3D学习非自治的不可压缩的非牛顿的液体的轨道asymptotic行为围住的领域。在适当拓扑学，作者为对统一轨道空间起作用的翻译semigroup证明一致轨道引起注意的人的存在。

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