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  • 简介:桥为工作的及时估价的缘故调节,测量桥结构的动态特征很重要、必要。监视测试的GPSdynamic在武汉Baishazhou桥被执行,它是最长的跨度之一留下来电缆线的桥在中国被造了。这篇论文介绍试验性的实现计划和数据处理方法。中间的跨度的颤动特征留下来ofcable的桥牌被使用有效地获得光谱分析途径。测量结果与理论设计价值很相同。研究表明那,高采样率的withGPS接收装置和合适的数据处理方法,桥结构的颤动特征能与高精确性被决定。

  • 标签: GPS系统 全球定位系统 空间分析 动力学特征
  • 简介:在决定与形状记忆合金(SMA)使用结构的隔离的有效性考虑的关键点是组成的模型,SMA隔离设备和分析方法。在这份报纸,一个简化组成的模型基于粘性的经典理论被建议模仿SMA,马氏体体积部分在被看作州的变量之一的superelasticity的行为。在模拟结果和试验性的结果之间的比较被做并且显示建议组成的模型产出在对试验性的好同意的压力紧张曲线。因此,建议模型能正确地模仿收益机制和SMA的精力驱散能力。下次,以便充分利用SMA的superelasticity,由pre-tensionedSMA酒吧组成的新SMA隔离乾被介绍。然后,一个有限元素分析模型被建立根据它的配置模仿SMA隔离乾的行为并且简化了组成的模型。最后,为与SMA隔离乾安装的长跨度的结构的一个简化设计方法被建议,它进一步被用来调查空间格子结构的隔离效果。结果证明SMA隔离乾能有效地减少结构的地震回答,它显示建议SMA隔离方法的有效性。

  • 标签: 形状记忆合金 大跨度结构 隔离装置 有限元分析模型 本构模型 应用
  • 简介:Therecentdevelopmentofhigh-strengthmagnesiumalloysisfocusedontheroleofthestrengtheningphaseswithanovellong-periodstacking-ordered(LPSO)structure.ThisreviewdetailedthemainfactorsinfluencingtheformationofLPSOphases,includingalloyingele-ments,preparationmethods,andheattreatments.Furthermore,processcontrolinstructuretypes,formationandtransformationbehavior,strengtheningandtougheningmechanismsoftheLPSOphasewerediscussed.Finally,thecurrentproblems...

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  • 简介:目的:观察针刺结合龙氏手法对腰椎间盘突出症患者功能的改善情况。方法:将60例患者随机分为观察组与对照组,每组各30例。观察组采用针刺结合龙氏手法治疗,对照组采用单纯针刺治疗。根据日本骨科学会(JapaneseOrthopaedicAssociation,JOA)评分系统评定腰椎功能,根据视觉模拟评分(VisualAnalogScale,VAS)进行疗效评定。结果:治疗后两组JOA差值及改善指数均有统计学差异(P〈0.05)。观察组的VAS较治疗前有非常显著性降低(P〈0.01),对照组有显著性降低(P〈0.05);两组治疗后VAS比较有显著性差异(P〈0.05)。结论:针刺结合龙氏手法对腰椎间盘突出症患者的功能改善作用优于单纯针刺治疗。

  • 标签: 针刺疗法 推拿 按摩 椎间盘移位 腰痛
  • 简介:Becauseseismicactivitywithinmid-continentsisusuallymuchlowerthanthatalongplateboundaryzones,evensmallearthquakescancausewidespreadconcerns,especiallywhentheseeventsoccurinthesourceregionsofpreviouslargeearthquakes.However,thesesmallearthquakesmaybejustaftershocksthatcontinuefordecadesorevenlonger.TherecentseismicityintheTangshanregioninNorthChinaislikelyaftershocksofthe1976GreatTangshanearthquake.ThecurrentearthquakesequenceintheNewMadridseismiczoneincentralUnitedStates,whichincludesaclusterofM*7.0eventsin1811–1812andanumberofsimilareventsinthepastmillennium,isbelievedtoresultfromrecentfaultreactivationthatreleasespre-storedstrainenergyinthecrust.Ifso,thisearthquakesequenceissimilartoaftershocksinthattheratesofenergyreleaseshoulddecaywithtimeandthesequenceofearthquakeswilleventuallyend.WeusesimplephysicalanalysisandnumericalsimulationstoshowthatthecurrentsequenceoflargeearthquakesintheNewMadridfaultzoneislikelyendingorhasended.Recognizingthatmid-continentalearthquakeshavelongaftershocksequencesandcomplexspatiotemporaloccurrencesarecriticaltoimprovehazardassessments.

  • 标签: 余震序列 中国北方 大陆地震 危险性评估 美国 新马德里地震带
  • 简介:A3DfiniteelementmodelfortheTaizhouYangtzeRiverBridge,thefirsttriple-towerlong-spansuspensionbridgeinChina,isestablishedbasedonthenonlinearfiniteelementsoftwareABAQUS,andthedynamiccharacteristicsofthebridgeareanalyzedusingtheLANCZOSeigenvaluesolutionmethod.Thestudyfocusesontheeffectsofthevertical,lateralandtorsionalstiffnessofthesteelboxgirder,therigidcentralbuckleandtheelasticrestraintsconnectingthetowersandthesteelboxgirderonthedynamiccharacteristicsofthetriple-towersuspensionbridge.Ourresultsshowthat,ingeneral,thedynamiccharacteristicsofthetriple-towersuspensionbridgearesimilartothoseoftwo-towersuspensionbridges.Thevertical,lateralandtorsionalstiffnessofthesteelboxgirderhavedifferenteffectsonthedynamiccharacteristicsoftriple-towersuspensionbridges.Theelasticre-straintshaveamoresignificanteffectonthedynamiccharacteristicsthanthecentralbuckle,anddecreasingthestiffnessoftheelasticrestraintsresultsintheappearanceofalongitudinalfloatingvibrationmodeofthebridge.Also,rigidcentralbuckleshaveagreaterinfluenceonthedynamiccharacteristicsoftriple-towersuspensionbridgesthanonthoseoftwo-towersuspensionbridges.Theresultsobtainedcouldserveasavaluablenumericalreferenceforanalyzinganddesigningsuper-long-spantriple-towersuspensionbridges.

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  • 简介:客观:调查长期的权利的影响在室的改变和病人的心脏的功能与上的室的顶端的踱步高级并且酷刑逼供有正常的心结构和心脏的功能的心房与心室的阻塞。另外,我们为选最佳的电极培植为site.Methods提供许多证据:学习参加者包括了为心律调整器代替被招收并且在门诊病人为植入的心律调整器的考试重游的病人。心律调整器被植入到高级的对待和酷刑逼供心房与心室的阻塞。在心律调整器培植的时候,病人们有正常心脏的功能并且没显示出严肃的心疾病或心脏的膨胀。到后续的从培植的持续时间是超过5年。踱步的率比80%高。有左室的喷射部分(LVEF)的病人<50%并且一条左室的结束心脏舒张的直径(LVEDD)>55公里被排除。室的改变被定义为follows:increase在10%的LVEDD和为在培植以后的五年的在25%的LVEF的减小。心脏的功能根据纽约心协会(NYHA)classification.Results被评估:有吝啬的年龄的82个病人的一个总数(66.97?????????????????吗??

  • 标签: 心脏起搏器 心室重构 心功能 右心室 心脏结构 传导阻滞
  • 简介:Cable-membranestructureshavesmallrigidityandarehighlysensitivetowind.Structuralhealthmonitoringisnecessarytoensuretheserviceabilityandsafetyofthestructure.Inthisresearch,thedesignmethodofastructuralhealthmonitoringsystemisusingthecharacteristicsofacable-membranestructure.TakingtheYueyangSanheAirportTerminalasanexample,afiniteelementmodelisestablishedtodeterminethecriticalstructuralcomponents.Next,theengineeringrequirementsandtheframeworkofthemonitoringsystemarestudiedbasedontheresultsofnumericalanalysis.Thespecificimplementationofthestructuralhealthmonitoringisthencarriedout,whichincludessensorselection,installationandwiring.TheproposedframeworkissuccessfullyappliedtothemonitoringsystemfortheYueyangAirportterminalbuilding,andthesynchronousacquisitionoffiberBragggratingandaccelerationsensorsignalsisimplementedinaninnovativeway.Thesuccessfulimplementationandoperationofstructuralhealthmonitoringwillhelptoguaranteethesafetyofthecablemembranestructureduringitsservicelife.

  • 标签: cable-membrane STRUCTURAL HEALTH monitoring FI nite
  • 简介:每一个身患绝症的人大概都无一例外地想知道一个问题:我还能活多长时间?在面对可能到来的死亡时,数字和几率忽然变得像救命稻草般重要,仿佛它们能驱散内心的恐惧,把生命从死亡线上拽回。如果说普通患者尚可以因对医学的无知而把生的希望寄托于数据的话,那么身患绝症的医生又该如何头脑清醒地面对死亡的威胁?从古至今,“清醒”的人总是最痛苦,

  • 标签: 死亡 HAVE HOW GOT 绝症 清醒
  • 简介:Wedemonstratedlong-periodgrating(LPG)inscriptiononpolymerfunctionalizedopticalmicrofibersanditsapplicationsinopticalsensing.Opticalmicrofiberswerefunctionalizedwithultraviolet-sensitivepolymethylmethacrylatejacketsand,thus,LPGscouldbeinscribedonopticalmicrofibersviapoint-by-pointultravioletlaserexposure.Fora2mmlongmicrofiberLPG(MLPG)inscribedonopticalmicrofiberswithadiameterof5.4μm,aresonantdipof15dBat1377nmwasobserved.ThisMLPGshowedahighsensitivityofstrainandaxialforce,i.e.,-1.93pm∕μεand-1.15pm∕μN,respectively.AlthoughtheintrinsictemperaturesensitivityoftheLPGsisrelativelylow,i.e.,-12.75pm∕°C,itcanbeincreasedtobe-385.11pm∕°Cbyappropriatesealing.Benefitingfromthesmallfootprintandhighsensitivity,MLPGscouldhavepotentialapplicationsinopticalsensingofstrain,axialforce,andtemperature.

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  • 简介:摘要INTRODUCTIONThis case study explores the gains in hand function in an individual with a chronic spinal cord injury (SCI). The intervention was long-term paired associative simulation (PAS). We aimed to provide PAS until full recovery of hand muscle strength occurred, or until improvements ceased.CASE PRESENTATIONA 46-year-old man with traumatic C7 AIS B tetraplegia was administered PAS three times per week. After 24 weeks, PAS was combined with concomitant motor training of the remaining weak hand muscles. Outcome measures included the manual muscle test (MMT), motor-evoked potentials (MEPs), F-responses, hand functional tests, and the spinal cord independence measure (SCIM).DISCUSSIONAfter 47 weeks of PAS the subject had improved self-care and indoor mobility and was able to perform complex motor tasks (SCIM score improved from 40 to 56). His left hand regained maximum MMT score (total 75; increase of score from baseline condition 19); the effect remained stable in the 32-week follow up. In the right-hand muscles, MMT scores of 4-5 were observed in follow up (total 71; increase from baseline 48). Improved values were also observed in other outcomes. This is the first demonstration of long-term PAS restoring muscle strength corresponding to MMT scores of 4-5 in an individual with chronic SCI. The effect persisted for several months, indicating that PAS induces stable plastic changes in the corticospinal pathway.

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  • 简介:Basedonpreviousresearchresults,present-daycrustaldeformationandgravityfieldsintheChinesemainlandareanalyzedusingtheGPSdata,leveling,gravityandcross-faultdeformations.Weanalyzedstrainaccumulationofthemajorfaults,andidentifiedlockedorhighstrainaccumulationsegments.Combiningtheeffectsoflargeearthquakesinthestudyarea,thelong-term(decade)probabilityoflargeearthquakesintheChinesemainlandisestimated.

  • 标签: ESTIMATION of earthquake risk area GEODETIC
  • 简介:OnMarch25,2014,thefirstplenarymeetingoftheLeadingGroupofHealth,FamilyPlanningandAgingWorkofNationalHealthandFamilyPlanningCommission(NHFPC)wasconvenedinBeijing.Mr.WangPei'an,ViceMinisterofNHFPCattendedthemeetingandmadeaspeech.WangpointedoutthatthePartyCentralCommitteeandtheStateCouncil

  • 标签: 老龄化 老年人 护理 计划生育 委员会 PEI
  • 简介:AbstractThe immune responses and the function of immune cells among asymptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection cases, especially in immuno-compromised individuals, remain largely unknown. Here we present a case of asymptomatic SARS-CoV-2 infection that lasted for at least 67 days. The patient has administrated Thymalfasin as 1.6 mg per dose every other day from Day 45 to 70, plus 200 mg per dose Arbidol antiviral therapy three doses per day from Day 48 to 57. Throughout the infection, no anti-SARS-CoV-2 specific IgM or IgG antibodies were detected. Instead, the patient showed either a low percentage or an absolute number of non-classical monocytes, dendritic cells (DCs), CD4+ T cells, and regulatory T cells (Tregs), which may account for the clinical feature and absence of antibody response. This case may shed new light on the outbreak management related to control/prevention, treatment, and vaccination of SARS-CoV-2 and other virus infections in immunocompromised individuals.

  • 标签: SARS-CoV-2 COVID-19 Asymptomatic infection Antibody response Immune cells