简介:摘要:随着科学技术的发展,人们的医疗水平也有了很大的提高,出现了许多精密仪器用来帮助医生完成手术,提高人们的安全。其中飞利浦fd20血管机是世界上最先进的技术之一,它是采用3D技术、X成像等技术来形成血管造影机。飞利浦fd20血管机有旋转速度快、形成的图像清晰、对人造成的伤害低等特点,因此,对飞利浦fd20血管机维护必不可少。
简介:Accordingtothepracticeofurbanactivefaultexplorationandassociatedfaultactivityassessmentconductedinrecentyears,thispapersummarizestheproblemsencounteredingeological,geomorphological,geochemicalandgeophysicalsurveys,andproposesthefollowingmeansandsuggestionstosolvetheseproblems.Todeterminethemostrecentfaultsorfaultzones,emphasisshouldbeplacedonidentifyingtheyoungestactivefaultsandoffsetgeomorphology.Tounderstandthehistoryoffaultingandtodiscoverthelatestoffsetevent,itissuggestedthatgeophysicalprospecting,drillingandtrenchingbeconductedononeprofile.BecauseofsignificantuncertaintiesinlateQuaternarydating,weadvisesystematicsamplingandtheuseofmultipledatingmethods.Shallowseismicreflectionhasbeenproventobethemostusefulmethodinurbanactivefaultexploration.However,thereisapressingneedtoincreasethequalityofdataacquisitionandprocessingtoobtainhighresolutionimagessoastoenhanceourabilitytoidentifyactivefaults.ThecombinationofseismicP-wavereflectionandS-wavereflectionmethodsisprovedtobeapowerfulmeanstoinvestigatethetectonicenvironmentsofthedeepcrust.
简介:Theconceptoffaultjunctionisproposedtodescribetherelationshipbetweenthetwofaultsbytheauthors.ThejunctionrelationshipbetweenGanjiangandTanlufaultsisanalyzedinthispaper,andthishasbeenelucidatedthroughnumericalsimulationaboutthetectonicstressfieldanalysis.NumericalsimulationofthetectonicstressfieldconductedforthemajormineralizationstageoftheJiujiang-Ruichangjunctionarearevealsthatthestressfieldofthejunctionstructureatthemajormineralizationstageshowsarelativelycloserelationshipwiththeformationoftheoredeposits(occurrences).
简介:BycomputingandclassifyingthedataofgullyoffsetobtainedfromfieldsurveysalongtheTianjingshanfaultzoneandestimatingtheagesofthreetypesofgullies,thestrike-slipratesalongthefaultzonearediscussedindifferenttimeintervalsandfaultsegments.Theresultssuggestthattheintensityofactivityalongthefaultzoneisnotstrong,butthedifferencesbetweendifferenttimeintervalsandfaultsegmentssincethelatePleistocenehavebeenobvious.Theaverageratesrangefrom0.23mm/ato1.62mm/a.Thelargestaveragerateis1.40mm/a,whichoccurredintheearlyandmiddleoflatePleistocenealongthewesternsegmentofthefaultzone.SincethelatestageofthelatePleistocene,thecenteroffaultingactivityofthefaultzonehasshiftedtothemiddlesegment,andtheaverageslipratesrangehavechangedfrom1.30mm/ato1.63mm/a.
简介:TheYuguangbasinisahalf-grabenbasininthebasin-rangetectoniczoneinnorthwestBeijing,locatedatthenorthernendoftheShanxigrabensystem,andtheYuguangbasinsouthernmarginalfault(YBSMF)controlstheformationofthisbasin.AlinearfaultescarpmenthasformedintheproluvialfanonthepiedmontfaultzoneoftheTangshankousegmentofYBSMF.Atrenchacrossthisescarpmentrevealsthreepaleo-earthquakeeventsontwoactivefaults.Onefaultrupturedatabout9kaforthefirsttime,andthenfaultedagainatabout7.3ka,causingtheformationandsynchronousactivityofanotherfault.Finally,theyfaultedforthethirdtime,butwecannotdeterminethefaultingtimeduetothelackofrelevantsurfacedeposition.Theaccumulativeverticaldisplacementofthesethreeeventsisabout8.1m.Weestimatethattheaveragerecurrenceperiodofthepiedmontfaultisabout1.7ka,andtheaveragesliprateofthepiedmontfaultisabout1.6mm/a.Wealsoestimatethereferencemagnitudeofeacheventaccordingtotheempiricalformula.
简介:Characteristicslipandcharacteristicearthquakemodelshavebeenproposedforseveraldecades.Suchmodelshavebeensupportedrecentlybyhigh-resolutionoffsetmeasurements.Thesemodelssuggestthatslipalongafaultrecursviasimilarlysized,largeearthquakes.Theinter-eventstrainaccumulationrate(ratioofearthquakeslipandprecedinginterseismictimeperiod)isusedheretotestthecharacteristicearthquakemodelbylinkingtheslipandtimingofpastearthquakesontheHaiyuanFault.Weaddresshowtheinter-eventstrainaccumulationratevariesovermultipleseismiccyclesbycombiningpaleoearthquakestudieswithhigh-resolutionairbornelightdetectionandranging(LiDAR)datatodocumentthetimingandsizeofpaleoearthquakedisplacementsalongthewesternandmiddlesegmentsoftheHaiyuanFault.Ourobservationsencompass5earthquakecycles.WefindsignificantvariationsovertimeandspacealongtheHaiyuanFault.WeobservethatonthemiddlesegmentoftheHaiyuanFaulttheratesslowdownorincreaseasananticorrelatedfunctionoftheratesofprecedingearthquakes.Here,weproposethattheinter-eventstrainaccumulationratesonthemiddlesegmentoftheHaiyuanFaultareoscillatingbothspatiallyandtemporally.However,alongthewesternsegment,theinter-eventstrainaccumulationrateisbothspatiallyandtemporallysteady,whichisinagreementwithquasi-periodicandslip-predictablemodels.Finally,weproposethatdifferentfaultsegmentswithinasinglefaultzonemaybehaveaccordingtodifferentearthquakemodels.
简介:Study of the segmentation of active fault by the boundary element method──analysis of the Xianshuihe fault zone(张超)(陈连旺)(赵国光)...
简介:Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemformostofmisunderstandingsbetweenthem.Theyhavealwayscomplained,moreorlessjustly,thattheirparentsareoutoftouchwithmodemways;thattheyarepossessiveanddominant;thattheydonottrusttheirchildrentodealwithcrisis;
简介:重要信息指差错运动(例如,差错活动时期,紧张,频率,和甚至有活力的背景)当渗出或磨擦时,能被解决差错凿揭示,它是差错运动的结果。地调查包含了样品从QinlingOrogenic带(QOB)的西方的片断的Bailong河差错系统收集;差错凿的44件样品为石英被收集微形态学的分析。这些样品用扫描电子显微镜学的地排放被分析。另外,14件样品为标明日期的热照明被测试。结果证明大多数石英谷物的表面质地被鱼规模,像苔藓的质地,和钟乳石描绘。然而,像皮的破裂和worm-hole-like塑造了的橘子的小数量表面质地被观察。而且,在石英谷物的一些典型conchoids或subconchoidal破裂能被看见。这暗示Bailong河差错在第四级的时期期间反复是活跃的,但是主要运动时期是更新世。标明日期价值的14热照明显示出二个年龄组:343.29-184.06ka和92.18-13.87ka。这些学习数据表明那个差错运动在上新世期间开始了,在更新世的早中间的时期经常发生了,并且运动的山峰频率在早更新世被到达。差错运动被停止在早Holocene终止了。结果为在QOB的西方的片断的自然灾难风险评估是重要的。
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简介:基于卫星雷达的工作原则,地震变丑地由interferometric测量了合成的孔(InSAR)地面排水量的设计在卫星的视觉(LOS)的线与seismogenic差错被联系。然而,LOS设计是复杂的,并且不仅与上升/下降的模式和SAR数据的发生角度有关,而且与罢工和差错的运动感觉有关。甚至为一样的地震,从不同上升/下降的数据导出的LOS变丑能是几乎在另一种情况中在一种情况中相同,却相当不同,它与域观察做InSAR地震变丑和它的比较的解释困难。在这研究,我们拿了在罢工,差错运动感觉,和上升/下降的模式,以及3D变丑回答的InSAR和差错的LOS观察敏感之间的关系的定量分析。我们用上升/下降模式在地震的不同类型学习了LOS变丑领域的特征和差别,与为地震的一种罢工滑倒类型的关系的特别地详细的分析。我们也与不同罢工和最佳的观察数据模式总结了差错的LOS变丑领域的特征。作为例子拿罢工滑倒Yushu地震和正常Gaize事件,我们使用了上升/下降的模式的SAR数据验证量的计算的结果。这些分析愿望不仅提供InSAR地震变丑领域的更合理的解释并且而且帮助理解数据与不同观察模式揭示的地震变丑领域的差别,因此在地震学支持InSAR技术的应用程序。