简介：2014年云南景谷先后发生MS6.6、MS5.8和MS5.9中强地震，云南强震动台网获取了丰富的加速度记录。本文整理了各次地震中固定台和流动台获取的强震动加速度记录资料，分别进行了地震动衰减关系和加速度反应谱分析，结果表明，所观测到的加速度峰值比云南地区地震动衰减关系预测值高，反应谱谱值随震级的增加有增大趋势。最后将益智强震台作为典型台站，分析了该台站在地震中的场地放大效应。

简介：SignificantanomalieswereobservedatthegeomagneticstationsinthesouthwestregionofChinabeforetheYingjiangMS6.1earthquakeandtheLudianMS6.5earthquakein2014.Weprocessedthegeomagneticverticalcomponentdiurnalvariationdatabythespatialcorrelationmethod.TheresultsshowthatduringtheperiodfromApril1toMay20,2014,thereexistedquasi-synchronousdecreasechangesinthecoefficientcurvesbetweenthefivegeomagneticstationsofGuiyang,Hechi,Nanshan,Muli,YongningandXinyiandHongshanstations.Furthermore,therewasahighgradientzoneinthenormalizedcorrelationcoefficientcontourmapwithbackgroundvaluesremoved.TheepicentersoftheYingjiangMS6.1earthquakeandtheLudianMS6.5earthquakearelocatedinthegradientzoneornearthegradientzone.

简介：Theearthquakestress-dropvaluesoftwosequenceswereaccuratelycalculatedaftertakingawaytheeffectsduetoregionalearthquakeanelasticattenuationandstationsiteresponse,usingwaveformdataandseismicphasedataofsequencesoftheJingguM_S6.6,andLudianM_S6.5earthquakesinYunnan.Theseresultsshowthatthestressdropwithmagnitudeincreaseswithinthescopeofthisstudyofmagnitude.Aftereliminatingtheinfluenceofthemagnitude,theaveragevalueofstress-dropintheJinggusequenceishigherthanthatoftheLudiansequenceatthesamemagnituderange.Thismayberelatedtothestressstateindifferentregions.Intermsofthechangesoftimeandspaceofstress-drop,beforeM_S5.8strongaftershock,thestress-dropis'slowingdown-turningup-keepingahighvalue'afterthemainshock,meanwhile,almostalloftheabnormallyhighstressdropvalueisdistributedaroundtheM_S5.8strongaftershock,showingthatthestressenvironmentintheregionwasincreasingafterthemainshock.AndaftertheM_S5.9strongaftershock,stress-droprapidlydeclinestoarelativelystablestate,meanwhile,thehighvalueofstress-dropisdistributedaroundthestrongaftershock,showingthattheregionaltectonicstressgetsmorefullyrelease,itsstressenvironmentbeginstorapidlydecrease.FortheLudiansequencewithoutastrongaftershockoccurring,theaveragevalueofstressdropislowerthanthatoftheJingguearthquakesequenceatthesamemagnituderange,whileatthesametime,thestress-dropoftheaftershocksequencealmosthasn'tchangedmuch.Inthetimeafterthemainshock,combinedwiththereleasecharacteristicsofthemainenergy,thestressintheregionisexcessivelyreleased,thesubsequentstressintheregiongraduallyreturnstonormal.ThismaybethereasonwhytheactivityofLudianaftershockssignificantlywasweakerandsubsequentlytherewerenostrongaftershocksoccurred.

简介：Inthispaper,thebasicconditionsandcharacteristicsoftheDatong-Yanggaoearthquakearedescribedindetail.Thetypeoftheearthquake,theaftershockactivity,theearthquaketrend,thecharacteristicsofdamageareanalyzedanddiscussed.Thisearthquakebelongstoasequenceofearthquakeswarmtypeandisoftheconcentratedlyoccurringcharacteristicsofseveralmainshocksinatimesequence,andtheaftershockactivitywasnormallyattenuated.Becauseoftheunreasonabledesignofbuildingsandrepeatedvibrationbyseveraldestructivemainshockswithinashortperiod,thedamageinthehighintensityregionwasaggravated.Theanalysisandthepredictionprocedureofthe1991Datong-Yanggaoearthquake(Ms=5.8)arealsobrieflygiven.

简介：摘要：为提高公司检修JSQ6工艺水平，提高检修效率，分析现存的制约因素，决定JSQ6特种车车体抹胶设备（龙门小车）进行改进，提高抹胶效率，进而提高生产效率。

简介：在1954年2月11日，有Ms7.3的地震发生在Hexi走廊的Shandan县，韦斯特中国。它是在在1949以后的西北中国的第一大地震。地震留给了47个人死者，伤害的332个人和几万个人无家可归者；将近7277座大楼被损坏或崩溃并且性质损失在不平的估计是超过10亿Ynan(RMB)。在meizoseismai区域，紧张是，Hongsihu盆和Shandan县是最严重的损坏，并且在Shandan，地震受灾的区域是4800km2。在纸，简短介绍被介绍给Shandan地震，包括基本参数，地震紧张的分发和自然环境。造破坏的特征特别地被讨论，地震灾难分发analysed.Finally展示，经济损失评估也是，象对地震和灾难减小的保护的含意一样的地震损坏，经验和课同样多的原因被总结。

简介：Ａｎａｌｙｓｉｓｏｆｆｏｒｅｓｈｏｃｋｓｅｑｕｅｎｃｅｏｆｔｈｅ１９７５ＨａｉｃｈｅｎｇｅａｒｔｈｑｕａｋｅｏｆＭｓ７．３Ｚｈａｏ－ＲｏｎｇＺＵＯ（左兆荣）；Ｊｉａｎ－ＰｉｎｇＷＵ（吴建平）ａｎｄＺｈｉ－ＬｉｎｇＷＵ（巫志玲）（Ｉｎｓｔｉｔｕｔｅｏｆ...

简介：ThegreatMs8.0Wenchuanearthquakehasbeenthemostdestructiveearthquakesince1949inChina.TheearthquakeoccurrednomorethanhalfayearaftertheestablishmentoftheNationalStrongMotionObservationNetworkSystem(NSMONS)ofChina;whatismore,theepicenterwaslocatedintheareawithdensestrongmotionobservationstationssothatalargenumberofstrongmotionrecordsofthemainshockwereobtained.Inthispaper,501strongmotionrecordsfrom167observationstationsareutilizedtoestablishthegroundmotionattenuationrelationsinthreedirectionsintherangeoffaultdistancelessthan600km.Theresultshowsthedifferenceofseismicmotionattenuationintwohorizontaldirectionsisinsignificant.Itisthefirsttimethatstrong-motionrecordsareusedtoestablishthegroundmotionattenuationrelationsoftheMS8.0earthquakeinChina.

简介：简单介绍了通渭地震台观测条件,并对通渭台近几年的地电阻率观测资料进行分析,发现2008年5月12日汶川Ms8.0级地震和2013年4月20日芦山Ms7.0级地震发生前,通渭地电阻率资料出现明显波动异常,波动异常持续1年多,震后恢复正常年变形态。

简介：摘要：陡直度与很多因素有关，如介质的材料、光刻胶的种类以及工艺参数等。在本文中，实验环境固定在硅介质表面，采用罗门哈斯公司生产的 LC100A型光刻胶，在已有成熟工艺的基础上，实验采用分段显影方法、改善前烘条件以及加入 PEB烘干对提高陡直度的影响。对陡直度的评价采用显微镜定性观察，扫描电镜测量的方法。

简介：随着深井超深井的增多，封隔器大量运用到储层改造方面，但封隔器的失效频率也逐渐增大。为更好掌握封隔器胶筒在压差作用下的力学行为，改进封隔器胶筒结构以满足现在复杂的井下工况，结合封隔器胶筒在井下的工作状态，建立了压缩式封隔器和扩张式封隔器胶筒失效机理；利用有限元分析软件，模拟压缩式和扩张式两种类型封隔器在井底压差作用下胶筒的力学行为，为这两类封隔器胶筒结构的设计和改进提供了理论依据。

简介：摘要现代社会经济在市场经济结构体系的完善促进下得到了显著发展，人们生活水平逐渐提高，空调已经成为冬天和夏天必须的家用电器。同时，在各种大型工业机器设备、各型号的车辆以及商场等公共区域都广泛应用空调。但是，空调使用过程中往往会出现胶管爆裂故障，影响其正常使用。本文主要根据不同类型和功能的空调出现胶管爆裂的原因以及预防措施。

简介：摘要：改革开放以来，快速地经济增长促进着我国各行各业的快速发展，其中汽车制造的相关产业发展迅速，形成了种类齐全、配套完整的产业体系，汽车胶管作为保证汽车功能正常运行的基础配件，汽车胶管行业未来的发展近年来备受关注。不同的发展时期对汽车胶管的制作工艺和研发技术也有着不同的要求，为了适应市场的需求，相关的企业单位应该不断加大研发力度，重视高端产品的研发，在行业市场竞争中，提高自身的竞争力，推动汽车胶管行业的良性发展。

简介：【摘要】作合理的球铰转角夹具，通过改良转角夹具的转角构造和外部造型，将幕墙的转角胶缝控制在设计范围内，内部球铰垫片解决了玻璃受力不均容易破损问题，增加了玻璃受水平荷载发生的变形能力。

简介：OnOctober27,2001,alargeearthquakewithMs6.0,namedtheYongshengearthquake,occurredalongtheJinshajiangsegmentofChenghaifaultinYongshengCounty,YunnanProvince.ItisthelargesteventtooccuralongtheChenghaifaultinthelast200years.Theseismo-geologicalsurveyshowsthattheseismogenicfault,whichistheJinshajiangsegmentofChenghalfault,takesleft-lateralstrike-slipasitsdominantmovementpattern.Accordingtodifferencesinverticalmotion,motiontime,landformsandscales,theChenhalfaultcanbedividedintoeightsegments.TheJinshajiangsegmenthasaverticaldislocationrateof0.4mm/a,farlowerthanthemeanrateoftheChenghaifault,about2.0mm/a.It'sdeducedthatthetwosidesofJinshajiangsegment'stuck'tightlyandhinderedthestrike-slipoftheChenghaifault.ThestrongearthquakedistributionbeforethiseventshowsthattheJinshajiangsegmentwasintheseismicgap.TheChenghaifault,asaboundaryoftectonicsub-blocks,makestheNorthwestYunnanblockandtheMiddleYunnanblockmoveclockwise,andtheirmarginsmoveoppositelyalongtheChenghalfault.InthemotionprocessoftheChenghaifault,structuralhindranceandtheseismicgapofstrongearthquakesarepropitioustotheconcentrationandaccumulationofstructurestress.Asaresult,theYongshengMs6.0earthquakeoccurred.TheSujiazhuang-ShangangfusegmentissimilartotheJinshajiangsegmentwithalowverticalmotionrateof0.3mm/aandintheseismicgap.Soit'spostulatedthatthesegmentmaybecomeanewstructurehindrance,andtheYongshengMs6.0earthquakemaytriggertheoccurrenceoffuturelargeearthquakesalongthissegment.

简介：Thechangelawsofintensityofnearly200moderate-smallearthquakeswithMs=2.0~5.5occurringontheChinesemainlandsince1954havebeenanalyzedandarecomparedwiththatofmoderatelystrongearthquakes(Ms≥5.0).Theresultsshowthatthereisquiteobviousregionalityinthestatisticallawsbybothmoderate-smallearthquakesandmoderatelystrongearthquakes:attenuationofintensityinEasternChinaisslowerthanthatinWesternChinaandtheratioofthemajoraxistotheminoraxisofiso-seismallinesinEasternChinaissmallerthanthatinWesternChina.Theresultsalsoshowthatforafixedmagnitudetheattenuationofintensityofmoderate-smallearthquakesisfasterwhenintensityishigherthanV+andslowerwhenintensityislowerthanV-incomparisonwiththatofmoderatelystrongearthquakes.Furthermore,therealsohavebeensomedifferencesintheaspectsasintensity-magnituderelationbetweenstatisticallawsofmoderate-smallearthquakesandmoderatelystrongearthquakes.Thesedi

简介：ThedistributionoftheintensityoftheMojiangMS5.9earthquakeinYunnanProvinceisexpounded,andthedamagecharacteristicsofbuildingsandthedamageratioandseismicdamageindexofvariousbuildingstructuresineachintensityareaarecomparedwiththoseofTheChineseSeismicIntensityScale.Themainbasisandmethodofseismicintensityassessmentarediscussedinthispaper.Itisconcludedthat:①Theseismicintensityshouldbebasedontheearthquakedamageofthehousingstructure,whichtakesupahighratiointheseismicintensityassessment.Itisrecommendedthatseismicintensityisestimatedbycalculatingtheaverageseismicdamageindex.②ThehighestintensityoftheMojiangMS5.9earthquakeisVIIIdegrees,withthelongaxistrendinginthenorth-westdirection.TheareaaboveVIIdegreesis5,180km^2.③TheintensitydistributionoftheMojiangMS5.9earthquakemeetsthenationalstandardandthedistributionlawofseismicintensityinYunnan.

简介：SeveralearthquakeswithMs≥5.0occurredintheDatongseismicregionin1989,1991and1999,TheprecisefocuslocationoftheearthquakesequencewasmadebytherecordsoftheremotesensingseismicstationnetworkinDatong.Usingthatdatatogetherwithmacro-intensitydistributionandfocalmechanismsolutions,weanalyzethedifferenceamongthreesubsequences.Theresultsshowthatthefocalfaultofthe1999Ms5.6earthquakewasaNWW-trendingleft-lateralstrike-slipfault.Itis16kmlongand12kmwide.Itdevelopedatthedepthof5kmandisnearlyverticalindip.Thetwopreviousearthquakesubsequences,however,weregeneratedbyactivityalongNNE-trendingright-lateralstrike-slipfault.Itcanbefoundthattherupturedirectioinofthe1999earthquakehaschanged.Itisgenerallyfoundthatarupturezonehasmorethantwodirectionsandhasdifferentstrengthalongthesetwodirections.Thecomplicatedegreeoffocalcircumstanceisrelatedtothetypeofearthquakesequences.ThereistheNE-trendingDawangcunfaultandtheNW-trendingTuanbufaultintheseismicregion,butnoproofindicatesaconnectionbetweenfocalfaultsandthesetwotectonicfaults.Thefeaturethatfocalfaultsofthreesubsequencesarestrike-slipisdifferentfromthatofthetwotectonicfaults.Itissuggestedthatthe1999earthquakesubsequencewaspossiblygeneratedbyanewrupture.

简介：TheseismicwaveformoftheYutianMS7.3earthquake,XinjiangonFebruary12,2014wasrecordedclearlyandcompletelybytheDigitalSeismicNetworksofXinjiang,Qinghai,Tibet,andXinjiangHotanarray,sothemethodofjointlocationbyregionalseismicnetworkandseismicarraycanbeusedtoaccuratelydeterminetheearthquakesourcelocation.Thefollowingtechnologieswereusedintheprocessoflocation:(1)WeselectedseismicstationsequallylocatedaroundtheepicenteroftheMS7.3earthquakewithanaverageintervalofabout15degreesintheinitiallocation.(2)TherecordingwaveformsofYutianseismicstationwererotatedtotheradialandtangentialdirectionstopreciselyobtainthearrivaltimeofS-wavestodeterminetheepicentraldistance.(3)Thevelocitymodelwasusedinthedeterminationoflocationoftheepicenter,basedonthehistoricalrecordsofearthquakesintheareawithinaradiusof1.0°fromthesourceasthecenter,andthevelocitymodelisobtainedafterre-fittingandcalibration.(4)BasedonthewaveformrecordsoftheHotanseismicarray,themethodofwaveformbeamingwasusedtodeterminetheazimuthsandperformthecorrectionoftheepicenterlocationwiththeseazimuths.(5)Thedeterministicmethodwasusedtomeasurethesourcedepth.Finally,itisconcludedthattheYutianMS7.3mainshockhypocenterlocationis36.197°N,82.467°E,focaldepth12kmandoriginaltime17:19:48.2p.m.February12,2014.

简介：AnM_S7.3earthquakeoccurredonFebruary12,2014inYutianCounty,XinjiangUygurAutonomousRegion,whichwasfollowedbyaseriesofaftershocks.ThispapercalculatesthedepthoftheM_S7.3earthquakesequencebyusingthedeterministicapproachwiththeseismicphasedatafromthecatalogdatabaseoftheChinaEarthquakeNetworksCenter,combinedwithoriginalseismicwaverecordsfromtheDigitalSeismicNetworkCenteroftheEarthquakeAdministrationofXinjiangUygurAutonomousRegion.