简介：Chinaisacountryofhighseismicitywithmanyhydropowerresources.Recently,aseriesofhigharchdamshaveeitherbeencompletedorarebeingconstructedinseismicregions,ofwhichmostareconcretedams.Theevaluationofseismicsafetyoftenbecomesacriticalproblemindamdesign.Inthispaper,abriefintroductiontomajorprogressintheresearchonseismicaspectsoflargeconcretedams,conductedmainlyattheInstituteofWaterResourcesandHydropowerResearch(IWHR)duringthepast60years,ispresented.Thedamsite-specificgroundmotioninput,improvedresponseanalysis,dynamicmodeltestverification,fieldexperimentinvestigations,dynamicbehaviorofdamconcrete,andseismicmonitoringandobservationaredescribed.Methodstopreventcollapseofhighconcretedamsundermaximumcredibleearthquakesarediscussed.

简介：为表面下的成像的一个被动地震方法的分析在周围的地震噪音作为照明的来源在哪个被采用被介绍表面下散布ers。成像算法能以引起图象背景噪音随着时间的过去减少的一种递归的方式把新数据合并到图象。在空间地支离破碎的周围的噪音的假设下面，为成像算法的点传播函数的一个分析表达式被导出。点传播函数(PSF)描绘图象的分辨率，它是收到的数组长度和周围的带宽的一个函数。

简介：ＢｉｎｏｍｉａｌｍｏｄｅｌｏｎｓｅｉｓｍｉｃｒｉｓｋａｎａｌｙｓｉｓＪｉａｎＷＡＮＧ（王健）ａｎｄＺｈｅｎ－ＬｉａｎｇＳＨＩ（时振梁）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉｊｉｎｇ１００...

简介：ＳｅｉｓｍｉｃａｎｉｓｏｔｒｏｐｙｂｅｎｅａｔｈＳｏｕｔｈｅｒｎＴｉｂｅｔＱＩＮＧ－ＴＩＡＮＬＵＩ（吕庆田），ＫＡＩ－ＹＩＭＡ（马开义），ＭＥＩＪＩＡＮＧ＇（姜枚），Ａ．ＨｉｒｎａｎｄＡ．Ｎｅｒｃｅｓｓｉａｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｉｎｅｒａｌＤｅ...

简介：Theseismicconceptualdesignisanessentialpartofseismicdesigncodes.Itpointsoutthattheterm'seismicconceptualdesign'shouldimplythreeaspects,i.e.,thegivenconceptitself,thespecificprovisionsrelatedtothegivenconceptandthedesigningfollowingtheprovisions.Seismicconceptualdesigncanbeclassifiedintotwocategories:thestrictortraditionalseismicconceptualdesignandthegeneralizedseismicconceptualdesign.Theauthorsaretryingtodefineforbothconceptualdesignstheirconnotationsandstudytheircharacteristics,inparticular,thedifferencesbetweenthem.Authorsemphasizethatbothconceptualdesignssoundveryclose,however,theirdifferencesareapparent.Thestrictconceptualdesignsareusuallyworkedoutdirectlyfromengineeringpracticeand/orlessonslearntfromearthquakedamage,whilethegeneralizedconceptualdesignsareresultedinaseriesofvisionsaimingtorealizethegeneralobjectivesoftheseismiccodes.Thestrictconceptualdesigns,(traditionalconceptualdesigns)areindispensableelementsofseismiccodesinassuringdesignedstructuressaferandthegeneralizedconceptualdesignsareplayingkeyrolesindirectingtoamoreadvancedandeffectiveseismiccodes.

简介：Thephysicalmeasuresofmacroscopicseismicintensityhavebeenextensivelystudiedbasedonthenewunderstandingofseismicintensityandthenewanalyticalmethodandnewdatabaseofstronggroundmotion.Newphysicalmeasuresofseismicintensityhavebeenproposed.

简介：

简介：常规时间成像技术不能够生产精确地震成像在Tarim盆的山前面表面下，中国。他们的想象的结构导致了以前钻失败的某专业，忍受他们的结构的闭合有的坏名声车轮和他们的结构的高度有弹簧。这篇文章首先列出成像挑战，并且解释在一图解时间成像技术为什么在这个区域失败。然后通过一系列真实数据例子，当时，它表明那在那里存在侧面的速度变化，深度成像是唯一的答案在这个区域处理成像挑战。为wavefield的复杂性的深度成像报道，因此生产优异、地质的嘴巧的图象。在适当地执行深度成像的核心任务是造速度模型。这篇文章强调一些主要方面在这方面。

简介：SeveralfactorsareselectedtoreflectthetemporalandspatialfeaturesofseismicityinSouthwestChina.Themeasurementsofthefactorsarealltakenfromthestatisticalrelationbetweenthefactorsandactualearthquakes,andmakethefactorspossessacertainprobabilisticpredictionmeaningandthebaseformutualcontrast.Theeffectsofpredictionofpartofthefactorshavebeenevaluatedandusedtocorrectthefactors.Threesetsofseismicspatialdistributionfunctionshavebeencalculatedbyusingthreedifferentmethodsanddiscussedindetail.

简介：石油地球物理学者认识到与油和煤气的水库有关的许多参数用地震属性数据被预言。然而，优化地震属性，预言薄沙岩水库的特性，并且提高水库描述精确性的最好怎么是为地质学家和地球物理学者的一个重要目标。基于主要部件分析的理论，我们在场一个新优化方法，叫的抑制主要部件分析。在一个油矿的当模特儿的估计和真实申请证明它能提高水库预言精确性并且有更好的适用性。

简介：Theobjectiveofthisresearchistodeterminetheeffectearthquakeshaveontheperformanceoftransportationnetworksystems.Todothis,bridgefragilitycurves,expressedasafunctionofpeakgroundacceleration(PGA)andpeakgroundvelocity(PGV),weredeveloped.Networkdamagewasevaluatedunderthe1994Northridgeearthquakeandscenarioearthquakes.Aprobabilisticmodelwasdevelopedtodeterminetheeffectofrepairofbridgedamageontheimprovementofthenetworkperformanceasdayspassedaftertheevent.Asanexample,thesystemperformancedegradationmeasuredintermsofanindex,"DriversDelay,"iscalculatedfortheLosAngelesareatransportationsystem,andlossesduetoDriversDelaywithandwithoutretrofitwereestimated.

简介：3-Dseismicmodelingcanbeusedtostudythepropagationofseismicwaveexactlyanditisalsoatoolof3-Dseismicdataprocessingandinterpretation.Inthispaperthearbitrarydifferenceandpreciseintegrationareusedtosolveseismicwaveequation,whichmeansdifferenceschemeforspacedomainandanalyticintegrationfortimedomain.Boththeprincipleandalgorithmofthismethodareintroducedinthepaper.Basedonthetheory,thenumericalexamplesprovethatthishybridmethodcanleadtohigheraccuracythanthetraditionalfinitedifferencemethodandthesolutionisveryclosetotheexactone.Alsotheseismicmodelingexamplesshowthegoodperformanceofthismethodeveninthecaseofcomplexsurfaceconditionsandcomplicatedstructures.

简介：ＳｅｉｓｍｉｃａｃｔｉｖｉｔｙａｎｄａｃｔｉｖｅｆａｕｌｔｓｉｎＨｕａｉｌａｉｂａｓｉｎＰＥＩＤＥＷＡＮＧ（王培德）ＹＵＨＯＮＧＴＩＡＮ（田玉红）ＣＨＵＮＬＡＩＬＩ（李春来）ＹＵＮＴＡＩＣＨＥＮ（陈运泰）ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓ...

简介：地震计算断层摄影术(CT)方法从节扫描首先在医药科学使用了的X光检查的基本原则被导出。方法在分开的地上凿穿记录在射击和接收装置之间的P波浪到达。用从2D的速度信息地震P波浪到达倒置，我们能在岩石和土壤身体中决定速度的分发。这篇论文介绍使用地震CT方法为隧道工程并且到检测岩石的结构的一个实际盒子为做第一到达时间反复的倒置利用SIRT算法。与另外的探索方法相比，它更有效、精确。

简介：

简介：The2010YushuMS7.1earthquakeoccurredinGanzi-Yushufault,whichisthesouthboundaryofBayanHarblock.Inthisstudy,byusingdoubledifferencealgorithm,thelocationsofmainshock(33.13°N,96.59°E,focaldepth10.22km)andmorethan600aftershockswereobtained.ThefocalmechanismsofthemainshockandsomeaftershockswithMS>3.5wereestimatedbyjointlyusingbroadbandvelocitywaveformsfromGlobalSeismicNetwork(GSN)andQinghaiSeismicNetworkaswell.Thefocalmechanismsandrelocationshowthatthestrikeofthefaultplaneisabout125°(WNW-ESE),andthemainshockisleft-laterallystrike-slip.Theparametersofshear-wavesplittingwereobtainedatseismicstationsofYUSandL6304bysystematicanalysismethodofshear-wavesplitting(SAM)method.Basedontheparametersofshear-wavesplittingandfocalmechanism,thecharacteristicsofstressfieldinseismicsourcezonewereanalyzed.ThedirectionsofpolarizationatstationsYUSandL6304aredifferent.ItisconcludedthatafterthemainshockandtheMS6.3aftershockonApril14,thestress-fieldwaschanged.

简介：ThetimeseriesofcoordinatesofalargenumberofGPSstationsintheworld,processedbyProf.GeoffreyBlewittwithGIPSYsoftwareareavailableathttp://geodesy.unr.edu.BasedonthetimeseriesofcoordinatesintheglobalreferenceframeofIGS08atmorethan250stationsofcontinuousGPSobservations,downloadedfromthewebsite,theco-seismicdisplacementsoftheM7.3KyushuearthquakeonApril16,2016inJapanandthepre-seismicstrainaccumulationsanddisplacementsintheregionalreferenceframewereobtained.ThestationofcontinuousGPSobservationatBJFSnearBeijinghasbeenquitestableindisplacementintheeasternpartofChinaformorethan17yearssincethebeginningofitsoperation,andthisstationisusedasthecorestationintheregionalreferenceframeforthepre-seismicdisplacementoftheKyushuearthquakeofM7.3.Themainfeatureofthepre-seismicdisplacementsoftheKyushuearthquakeischaracterizedbylockinginthecrustatandneartheepicenter.Theanomalouspre-seismicstrainaccumulationdevelopedinanareaofanomalousaccumulationoftheshearstraincomponentofγ1onthenortheastsideoftheepicenter,withincreasingsizeoftheareaandincreasingmagnitudeinγ1.Thelargestareacoveredbytheanomalousγ1isabout2000km2.ThechangeintheEcomponentatBJFSsinceNovember26,2015wascausedbythereplacementofthereceiverandtheantennaatthestation.Inordertostudytheshort-termchangeindisplacementsatstationsatandneartheepicenter,thetimeseriesat3stationswithcontinuousGPSobservations,2atSUWNandDAEJinsouthKoreaand1atBJSHnearBeijingwereanalyzed.Theanalysisshowsthatthedisplacementsatthe3stationshavebeenquitestableinthesamemannerineastAsia.Thus,BJSHisusedasthecorestationintheregionalreferenceframeofdisplacementandthedisplacementtimeseriesshowthattherewerenosignificantshorttermanomaliesbeforetheearthquake

简介：ＩｎｔｒｏｄｕｃｔｉｏｎＳｉｎｃｅｅａｒｔｈｑｕａｋｅｏｃｃｕｒｒｅｎｃｅ,ｔｈｅｙｈａｖｅｐｒｏｖｉｄｅｄｇｏｏｄｏｐｐｏｒｔｕｎｉｔｉｅｓｆｏｒｄｉｓｃｏｖｅｒｉｎｇｔｈｅｕｎｄｅｒｇｒｏｕｎｍｙｓｔｅｒｙａｎｄｒｅｃｏｇｎｉｚｉｎｇｅａｒｔｈｑｕａｋｅｓ—ｔｈｅｎａｔｕｒｅｐｈｅｎｏｍｅｎｏｎ.Ａｌａｒｇｅｅａｒｔｈｑｕａｋｅ’ｓｏｃｃｕｒｒｅｎｃｅ,ｏｆｃｏｕｒｓｅ,ｗｉｌｌｂｒｉｎｇｈｕｍａｎｋｉｎｄｗｉｔｈｌａｒｇｅｄｉｓａｓｔｅｒ.Ｗｉｔｈｒｅｃｏｇｎｉｚａｎｔｅｎｈａｎｃｅ,ｗｅｃａｎｅｓｔａｂｌｉｓｈｍｏｒｅｅｆｆｅｃｔｉｖｅｍｅａｓｕｒｅｆｏｒａｌｌｅｖｉａｔｉｎｇｓｅｉｓ

简介：我们由使用nonstationary多项式试穿(NPF)为地震噪音变细建议一个新奇方法，它能沿着事件与振幅变化估计协调部件。有变化时间的系数的NPF能适应地估计协调部件。多项式系数的光滑被塑造规则化控制。信号沿着在一个普通中点(CMP)的偏移量轴是协调的在正常moveout(NMO)以后的集合。我们使用NPF估计有效信号并且从而稀释随机的噪音。为象地面转动那样的光线的像事件的噪音，我们首先采用光线的踪迹(RT)转变数据到时间速度域的变换。然后，NPF被用来在RT领域估计协调噪音。最后，协调噪音适应地从吵闹的数据集被减去。建议方法能有效地沿着事件与振幅变化估计协调噪音，没有需要建议那个噪音振幅是不变的。结果合成并且域数据例子证明与象静止多项式适合和低切割过滤器那样的常规方法相比，建议方法能有效地压制地震噪音并且保存信号。

简介：随机的地震倒置是geostatistics和从地震记录，井木头，和geostatistics把信息集成到表面下的模型的以后的概率密度功能(PDF)的地震倒置技术的联合。Markov链蒙特卡罗(MCMC)方法被用来取样以后的PDF，表面下的模型特征能被分析推断一套以后的PDF样品。在这份报纸，我们首先介绍随机的地震倒置理论，讨论并且分析四个关键参数：地震数据signal-to-noise比率(S/N)，variogram，以后的PDF样品数字，和井密度，并且建议这些参数的最佳选择。分析结果证明地震数据S/N调整在地震数据的影响之间的妥协，倒置上的geostatistics结果，variogram控制倒置结果的光滑，以后的PDF样品数字决定统计特征的可靠性源于样品，并且很好，密度影响倒置无常。最后，在随机的地震倒置之间的比较和确定的模型基于地震倒置显示随机的地震倒置能提供表面下的特性的更可靠的信息。