学科分类
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22 个结果
  • 简介:BackgroundCoronaryslowflow(CSF)duringprimarypercutaneouscoronaryintervention(PCI)iscloselyrelatedtotheprognosisofpatientswithacutemyocardialinfarction(AMI).WhetherEnhancedExternalCounterPulsation(EECP)couldimprovethephenomenonandenhancecardiacfunctioninthesepatientshasnotbeenstudied.MethodsSeventy-eightAMIpatientsundergoingprimaryPCIwereenrolledanddividedinto2groups,EECPgroupandshamgroup.InEECPgroup,thepatientsweretreatedwithEECPfor30minaftercoronaryarterystentimplantation;andinshamgroup,thepatientsaftercoronaryarterystentimplantationweretreatedwithcuffswrappedfor30min.HemodynamicsandcorrectedTIMIFrameCount(cTFC)wererecordedatdifferenttimepointsinbothgroups.CRP,HCY,NT-proBNPandKillipclasswerealsodetectedbeforeoperationandaftertreatment.ResultsInEECPgroup,comparedtopre-andpost-EECPtreatment,thesystolicbloodpressure(SBP)wasmuchlower(P<0.05),diastolicbloodpressure(DBP)andmeanarterialbloodpressure(MBP)weremuchhigher(P<0.05).Theheartrate(HR)wasnotchangedduringEECPtreatment(P>0.05).Inshamgroup,SBP,DBP,MBPandHRwerenotsignificantlychangedduringtheseperiod(P>0.05).InEECPgroup,thecTFCofpatientswithCSFdecreasedsignificantlyaftertreatment(P<0.05);andtherewasnodifferenceinshamgroup(P>0.05).Comparedwithpre-EECPtreatment,CRPandHCYwereincreasedinpost-EECPtreatmentofbothgroups(P<0.05),while,theyweremuchlowerinEECPgroup(P<0.05).TheexpressionofNTproBNPwasdecreasedaftertreatmentinbothgroups(P<0.05),anditwasmuchlowerinEECPgroupthaninshamgroup(P<0.05).TheKillipclasswasmuchloweraftertreatmentthanbeforeoperationinEECPgroup(P<0.05),andtherewasnochangeinshamgroup(P>0.05).ConclusionsTheresultssuggestthatEECPishelpfulinashorttimetotheimprovementofCSFandrecoveryofcardiacfunctioninAMIpatientsduringprimaryPCI,andthatCRPandHCYmaybeinvolvedinthispr

  • 标签: 冠状动脉支架 急性心肌梗死 血流动力学 介入治疗 心脏功能 增强型
  • 简介:Muonsproducedbyashortpulselasercanserveasanewtypeofmuonsourcehavingpotentialadvantagesofhighintensity,smallsourceemittance,shortpulsedurationandlowcost.Tovalidateitinexperiments,asuitablemuondiagnosticssystemisneededsincehighmuonfluxgeneratedbyashortpulselasershotisalwaysaccompaniedbyhighradiationbackground,whichisquitedifferentfromcasesingeneralmuonresearches.Adetectionsystemisproposedtodistinguishmuonsignalsfromradiationbackgroundbymeasuringthemuonlifetime.Itisbasedonthescintillatordetectorwithwaterandleadshields,inwhichwaterisusedtoadjustenergiesofmuonsstoppedinthescintillatorandleadtoagainstradiationbackground.AGeant4simulationontheperformanceofthedetectionsystemshowsthatefficiencyupto52%couldbearrivedforlow-energymuonsaround200MeVandthisefficiencydecreasesto14%forhigh-energymuonsabove1000MeV.Thesimulationalsoshowsthatthemuonlifetimecanbederivedproperlybymeasuringattenuationofthescintillalightofelectronsfrommuondecaysinsidethescintillatordetector.

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  • 简介:Inthispaper,thenormalformanalysisofquadratic-cubicSwift-Hohenbergequationwithadissipativetermisinvestigatedbyusingthemultiple-scalemethod.Inaddition,weobtainHamiltonian-Hopfbifurcationsoftwoequilibriaandhomoclinicsnakingbifurcationsofone-peakandtwo-peakhomoclinicsolutionsbynumericalsimulations.

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  • 简介:Amine-silicacompositematerialsforpost-combustionCO2capturehaveattractedconsiderableattentionbecauseoftheirhighCO2uptakeatlowCO2concentrations,excellentCO2captureselectivityinthepresenceofmoisture,andlowerenergyrequirementsforsorbentregeneration.Thisreviewdiscussestherecentadvancesinamine-silicacompositesforCO2capture,includingadsorbentpreparationandcharacterization,CO2captureunderdryandmoistureconditionsatdifferentCO2partialpressures,sorbentregeneration,andstabilityaftermanycyclicsorption-desorptionruns.

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  • 简介:ByRiccatitransformation,weestablishsomenewoscillationcriteriaforaclassofevenorderdelaydifferentialequationswithnonlinearterm.Insomesense,theresultsobtainedextendsomeknownresultsintheliterature.

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  • 简介:Theyear2014wasatippingpointfortheBarackObamaAdministration—thatwastheyearwhenitstrovetoforgealegacyoftheObamaerabutcameupagainstchallengesarisingfrommajorchangesthatweretakingplaceinternationallyanddomestically.TheAdministrationwasthenfocusedonmaintainingafragilebalancebetweencreatingthislegacyandrespondingtothesechallenges.Obamastucktohisfundamentalprincipleswhendealingwithoverseasaffairs,buthealsocameupwithnewresponses.Thedynamicbalancestruckbetweenthesetwoformedthebasisoftheglobalstrategyofthelate-termObamaAdministration.TheAdministration'sfocusatthistimehighlightsthedilemmaitfacedinforgingalegacy.Further,theforeignpolicyofObamaandTrumpareactuallynotsodifferent;theybothsupportedsomedegreeofisolationismwithafocusondomesticissues.

  • 标签: 外交政策 政府 遗产 后期 全球战略 国内
  • 简介:AIM:Toevaluatethepositiveeffectsofblue-violetlightfilteringlensesindelayingmyopiaandrelievingasthenopiainjuveniles.METHODS:Sixtyametropiajuveniles(agedrange,11-15y)wererandomizedintotwogroups:thetestgroup(30children,60eyes),wearingblue-violetlightfilteringlenses;andthecontrolgroup(30children,60eyes),wearingordinaryasphericallenses.Baselinerefractivepoweroftheaffectedeyesandaxiallengthofthetwogroupswasrecorded.After1-year,thepatientsunderwentcontrastsensitivity(glareandnon-glareunderbrightanddarkconditions),accommodation-relatedtesting,asthenopiaquestionnaireassessment,andadversereactionquestionnaireassessment.RESULTS:After1yofwearingthefilteringlenses,changesinrefractivepowerandaxiallengthwerenotsignificantlydifferentbetweenthetwogroups(P>0.05).Underbrightconditions,thecontrastsensitivitiesatlowandmediumfrequencygrating(visionanglesof6.3°,4.0°,and2.5°)withglareinthetestgroupweresignificantlyhigherthaninthecontrolgroup(P<0.05),whilethecontrastsensitivityatlow-frequencygrating(visionanglesof6.3°and4.0°)intheabsenceofglareinthetestgroupwashigherthaninthecontrolgroup(P<0.05).Underglareandnon-glaredarkconditions,thecontrastsensitivitiesofvariousfrequenciesinthetestgroupdidnotshowsignificantdifferencescomparedwiththoseinthecontrolgroup(P>0.05).Inthetestgroup,theamplitudeofaccommodation,accommodativelag,andaccommodativesensitivityofpatientswearingglassesfor6and12moweresignificantlyelevated(P<0.05),whiletheasthenopiagratingsweresignificantlydecreased(P<0.05).Nevertheless,inthecontrolgroup,theamplitudeofaccommodation,accommodativelag,andaccommodativesensitivityafter12mowerenotsignificantlyalteredcomparedwithbaseline(P>0.05),andtheasthenopiagratingwasnotsignificantlydecreased(P>0.05).Inaddition,afterwearingglassesfor6to12mo,theasthenopiagratingofpatientsinthetestgro

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  • 简介:Inthispaper,weconsideraLorentzspacewithamixednormofperiodicfunctionsofmanyvariables.WeobtaintheexactestimationofthebestM-termapproximationsofNikol'skii'sandBesov'sclassesintheLorentzspacewiththemixednorm.

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  • 简介:为了在长期的绿内障patients.METHODSA评估有中央角膜的subbasal神经纤维层的眼睛的表面变化和它的关联,没有任何眼睛的问题,眼睛的表面评估的未来的比较学习为至少6mo和25个正常题目的50只眼睛在使用二的25个病人或更多的antiglaucoma药的50只眼睛被执行作为控制。评估的学习参数包括了视觉尖酸,intraocular压力,眼睛的表面评估参数[荧光黄分散时间(FTBUT),我测试的Schirmers,眼睛的表面染色分数和眼睛的表面疾病索引分数(OSDI)],中央角膜的感觉(CochetBonnettaesthesiometer),由在绿内障盒子和控制组中的共焦的microscopy.RESULTSThe平均数值的中央subbasal神经纤维层密度(SBNFLD)分别地如下:OSDI分数(35.89祣潴楫敮????????????木????€???€乔????偉?‰??????????倨???‵??

  • 标签: 共焦的显微镜学 绿内障 眼睛的表面疾病 subbasal 神经纤维层 治疗
  • 简介:Theseismicperformanceoffourshortconcretecolumnswasinvestigatedunderlowcycleandrepeatedloads,includingthefailurecharacteristics,hystereticbehavior,rigiditydegeneracyandsteel-barstress.Theinfluencesofreinforcementstrength,stirrupratioandshearspanratiowerealsocompared.Testresultsrevealthattherestrictioneffectofstirrupscanimprovethepeakstress,sothebearingcapacityofspecimencanbeimproved;forthehigh-strengthshortconcretecolumnwithhigh-strengthstirrups,itwasmorereasonabletouseultimatedisplacementangletoreflecttheductilityofthespecimen,andtheyieldstrengthofhigh-strengthstirrupsshouldbedevaluedwhencalculatingthestirrupcharacteristicvalue;theseismicperformanceofshortcolumnwouldbeimprovedwiththeincreaseofvolume–stirrupratioandshearspanratio;thehigh-strengthstirrupsandhigh-strengthlongitudinalreinforcementsdidnotyieldwhentheloadactingonthespecimenreachedthepeakvalue,whichbroughtadequatesafetystocktotheseshortcolumns.

  • 标签: HIGH-STRENGTH STIRRUP HIGH-STRENGTH longitudinal REINFORCEMENT HIGH-STRENGTH
  • 简介:在这份报纸,我们考虑与一般抑制联系到线性有弹性的方程的一个半线性的概括夸张边界价值问题可变代表的术语和非线性打字。在合适的条件下面,本地、全球的存在定理被证明。答案的唯一被消除被另外的作者为不同特别问题强加了的一些假设得到了。我们证明有重要起始的资料的任何答案变得稳定。

  • 标签: 弹性方程 半线性 稳定性 存在唯一性 广义 边值问题
  • 简介:长期的前列腺炎能影响精子质量。以前的研究证明了transrectal微波thermotherapy(TRMT)在精子上与长期的前列腺炎,而是效果在病人导致征兆的地势小心地没被调查。当过去常与长期的nonbacterial前列腺炎对待病人时,这研究在症状的消除和精子的质量上评估TRMT的影响。六十个病人在学习被注册。TRMT治疗在5天被管理,1h每天。精液检查被执行预告的处理并且立即在5天的治疗的结论。另外,它被重复1个月,3个月,和6个月以后。治疗症状消除功效用健康长期的前列腺炎症状索引(NIH-CPSI)的国家研究所被评估。在治疗以后,全面NIH-CPSI分数与预告的处理的那些相比是更低的。另外,在表示prostatic分泌物的白血房间和卵磷脂在治疗以后是正常的。精子计数在治疗以后到23.8%3个月被减少,精子活动性被10.3%在治疗以后立即减少,并且精子畸形被17.2%增加。精子体积和PH没被影响。然而,在治疗和畸形性率在在治疗以后的6个月也是更低的以后,精子质量恢复了。TRMT是为有nonbacterial的病人的一种有利、安全的治疗选择长期的前列腺炎。它能在精子质量上减轻病人症状和影响在短期。

  • 标签: 慢性前列腺炎 精子质量 短期影响 微波热疗 细菌性 患者
  • 简介:Thedamageprocessandcorrosioniondistributioninconcrete,whichwasexposedto60and170drying-immersioncyclesofsulfatesolution,weresystematicallyinvestigated.Theeffectsofplainconcrete,plainconcretemixedwith4and8kg/m~3modifiedPPfiberandhigh-performanceconcrete(HPC)mixedwith0.8kg/m~3finePPfiberonthedamageprocesswerealsostudied.Theexperimentalresultsshowedthatthenarditeinducedsurfacescaling,aswellasgypsum-andettringite-inducedcracks,werethemaindegradationformsofconcreteunderattackofsulfatesolutionanddrying–immersioncycles.Therelativedynamicmodulusofelasticityofconcreteinitiallyincreased,thenreachedstabilityandfinallydecreasedtofailure.ThesulfatediffusioncoefficientsofplainandHPCwere10~(-12)and10~(-13)m~2/s,respectively.Theconcentrationofsodiumionincreasedwithdepth,thenmaintainedstabilityandfinallydecreasedrapidlywithconcretedepth.Thecontentofcalciumionontheconcretesurfacewas110%-150%ofthatintheinteriorofspecimens.Althoughfiberworsenedthesurfacescalingofconcrete,betterresistancecapacityofsulfateionpenetrationintoconcretewasobservedinplainconcretewith4kg/m~3modifiedPPfiberandHPC.

  • 标签: 纤维混凝土 循环过程 长期性能 硫酸溶液 钢筋暴露 改性聚丙烯纤维
  • 简介:社会昆虫展览建筑群学习和记忆机制当时foraging。Vespulagermanica(Fab)(Hymenoptera:Vespidae)是一只侵略社会黄蜂经常undepleted食物来源上的牧草,做在资源和巢之间的几架班机。以前的研究证明了在这重定位的行为期间,黄蜂学会把食物与某个地点联系,并且能记起这个协会1h以后。在这个工作,我们评估了这黄蜂种是否能够在24h以后检索一个确定的协会。为这个目的,我们训练了自由飞的个人从位于一个试验性的数组的一个试验性的盘子(feeder)收集proteinaceous食物。150个个人的一个总数被给予2,4,或8访问。在训练阶段以后,数组以后,但是这次再被搬迁并且设置24h第二个引诱盘子被放对第一相反。在24h以后,我们记录了回到了从以前有学问的喂车站或nonlearned车站收集了食物的试验性的区域和那些的黄蜂的率。在严峻的阶段期间,而归还黄蜂的率与4或8训练了,我们观察到黄蜂的低率与2训练了收集还给试验性的区域(22%)的收集访问更高(51%和41%,分别地)。而且,与8喂的访问训练的黄蜂比从nonlearned那只做了的那些以更高的率从以前有学问的喂车站收集了食物。相反,黄蜂训练了2或4次以类似的率选择了两个喂的车站。因此,显著地,更多的黄蜂在8架重复foraging班机以后然而并非在仅仅2或4访问以后回到了以前有学问的喂车站。这是在V表明长期的空间记忆的存在的第一份报告。germanica黄蜂。

  • 标签: 记忆机制 觅食行为 胡蜂科 黄蜂 空间 食物来源
  • 简介:Background:Tropicaldryforestscoverlessthan13%oftheworld'stropicalforestsandtheirareaandbiodiversityaredeclining.InsouthernAfrica,themajorthreatisincreasingpopulationpressure,whiledroughtcausedbyclimatechangeisapotentialthreatinthedriertransitionzonestoshrubland.Monitoringclimatechangeimpactsinthesetransitionzonesisdifficultasthereisinadequateinformationonforestcompositiontoallowdisentanglementfromotherenvironmentaldrivers.Methods:Thisstudycombinedhistoricalandmodernforestinventoriescoveringanareaof21,000km~2inatransitionzoneinNamibiaandAngolatodistinguishlatesuccessiontreecommunities,tounderstandtheirdependenceonsitefactors,andtodetecttrendsintheforestcompositionoverthelast40years.Results:Thewoodlandsweredominatedbysixtreespeciesthatrepresented84%ofthetotalbasalareaandcanbereferredtoasBaikiaea-Pterocarpuswoodlands.Aboostedregressiontreeanalysisrevealedthatlatesuccessiontreecommunitiesareprimarilydeterminedbyclimateandtopography.TheSchinziophytonrautaneniiandBaikiaeaplurijugacommunitiesarecommononslightlyinclinedduneorvalleyslopesandhadthehighestbasalarea(5.5-6.2m~2ha~(-1)).TheBurkeaafricana-GuibourtiacoleospermaandPterocarpusangolensis-Dialiumenglerianumcommunitiesaretypicalforthesandyplateauxandhaveahigherproportionofsmallerstemscausedbyahigherfirefrequency.AdecreaseinoverallbasalareaoratrendofincreasingdominationbythemoredroughtandcoldresilientB.africanacommunitywasnotconfirmedbythehistoricaldata,butthereweresignificantdecreasesinbasalareaforOchnapulchraandthevaluablefruittreeD.englerianum.Conclusions:Theslopecommunitiesaremoreshelteredfromfire,frostanddroughtbutaremoresusceptibletohumanexpansion.ThecommunitywiththeimportanttimbertreeP.angolensiscanbestwithstandhighfirefrequencybutshowssignsofahighervulnerabilitytoclimatechange.Conse

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