简介：ThecentralstructurebeltinTurpan-HamibasiniscomposedoftheHuoyanshanstructureandQiketaistructureformedinlateTriassic-earlyJurassic,andischaracterizedbyextensionaltectonics.Thethicknessofstratainthehangingwallofthegrowthfaultisobviouslylargerthanthatinthefootwall,andadepositioncenterwasevolvedintheTaibeisagwherethehangingwallofthefaultislocated.InlateJurassicthecollisionbetweenLhasablockandEurasiacontinentresultedinthetransformationoftheTurpan-Hamibasinfromanextensionalstructureintoacompressionalstructure,andconsequentlyinthetectonicinversionofthecentralstructurebeltoftheTurpan-Hamibasinfromtheextensionalnormalfaultintheearlierstagetothecompressivethrustfaultinthelaterstage.TheTertiarycollisionbetweentheIndianplateandtheEurasianplateoccurredaround55Ma,andthisHimalayanorogeniceventhasplayedaprofoundroleinshapingtheTianshanarea,onlytheeffectofthecollisiontothisareawasdelayedsinceitculminatedhereapproximatelyinlateOligocene-earlyMiocene.Thecentralstructurebeltwasstronglydeformedandthrustedabovethegroundasaresultofthistectonicevent.
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简介：ThispaperbrieflyreviewsmainprogressintheresearchonlithosphericstructureandcontinentalgeodynamicsmadebyChinesegeophysicistsduringlast4yearssince22ndIUGGgeneralassemblyinJuly1999.Theresearchmainlycoversthefollowingfields:investigationsonregionallithosphericstructure,DSSsurveyofcrustanduppermantlevelocitystructure,studyonpresent-dayinnermovementanddeformationofChinesemainlandbyanalyzingGPSobservations,geodynamicsofQingzangplateau,geophysicalsurveyoftheDabie-Suluultra-highpressuremetamorphicbeltandprobingintoitsformationmechanism,geophysicalobservationsinsedimentarybasinsandstudyontheirevolutionprocess,andplatedynamics,etc.
简介：The3-Dspiralstructureresultingfromthebalancebetweenthepressuregradientforce,Coriolisforce,andviscousforceisacommonatmosphericmotionpattern.Ifthenonlinearadvectivetermsareconsidered,thistypicalpatterncanbebifurcated.Itisshownthatthesurfacelowpressurewithconvergentcyclonicvorticityandsurfacehighpressurewithdivergentanticyclonicvorticityareallstableundercertainconditions.Theanomalousstructurewithconvergentanticyclonicvorticityisalwaysunstable.Buttheanomalousweakhighpressurestructurewithconvergentcyclonicvorticitycanexist,andthisdenotesthecyclone'sdyingout.
简介：Thispaperdescribesthestructure,geometricmodelandgeometriccalibrationofPhotogrammetronI-thefirsttypeofphotogrammetronwhichisdesignedtobeacoherentstereophotogrammetricsysteminwhichtwocamerasaremountedonaphysicalbasebutdrivenbyanintelligentagentarchitecture.Thesystemcalibrationisdividedintotwoparts:thein-labcalibrationdeterminesthefixedparametersinadvanceofsystemoperation,andthein-situcalibrationkeepstrackingthefreeparametersinreal-timeduringthesystemoperation.Inavideosurveillanceset-up,preparedcontrolpointsaretrackedinstereoimagesequences,sothatthefreeparametersofthesystemcanbecontinuouslyupdatedthroughiterativebundleadjustmentandKalmanfiltering.
简介：在关于闪电放电的物理过程和在在中国的最后十年的雷雨的电的结构的研究的进步被考察了。由使用开发theself的闪电与时间的高度和空间分辨率检测并且定位技术，在在中国的一些代表性的区域的闪电放电的特征和参数被获得了。在闪电活动的观察在2002-2005在Qinghai西藏的高原第一次被进行，并且雷雨的特殊特征和在高原的闪电活动被揭示。在可见的光的乐队的闪电系列被记录，并且光谱线与原子结构的现代理论的介绍详细被识别。这些技术在上人工地，高度触发了闪电，在严厉电磁的环境下面的相关大小好发展。ofbi方向性的领导人繁殖在触发的闪电放电期间借助于光学和甚高频放射被观察的证据。一些闪电保护设备用触发技术的人工的闪电被测试了。另外，在闪电活动和天气和气候之间的关联preliminarily被学习。
简介：Differentfromthetraditionalone-dimensionalextremevaluestatisticalmethod,practicaldesigncriteriafornearshorestructuredesignarepresentedbasedonjointprobabilitytheoryinthispaper.Theproposedprocedureconsidersthecombinedeffectoftidelevel,hugewavesandwindaffectingcoastalstructures.TheImportanceSamplingProcedure(ISP)isutilizedtosolvethejointdistributionofnon-Gaussiancorrelatedmultivariatedistributions.ThecalculationresultsshowthattheISPisasimulatingtechniquewiththeadvantagesofefficiencyandhighconvergency.Finallytheenvironmentalconditionsaregivenusingthistechniquefornear-shorestructuredesignintheQingdaoarea.
简介：ThispaperpresentsactualityofinvestigationandstudyofthecrustalstructurecharactersofEastChinaSeaathomeandabroad.Basedonlotsofinvestigationandstudyachievementsandthedifferenceofthecrustalvelocitystructurefromwesttoeast,theEastChinaSeaisdividedintothreeparts-EastChinaSeashelfzone,OkinawaTroughzoneandRyukyuarc-trenchzone.TheEastChinaSeasheffzonemostlyhasthreevelocitylayers,i.e.,thesedimentblanketlayer(thevelocityis5.8-5.9km/s),thebasementlayer(thevelocityis6.0-6.3km/s),andthelowercrustallayer(thevelocityis6.8-7.6km/s).SotheEastChinaSeashelfzonebelongstothetypicalcontinentalcrust.TheOkinawaTroughzoneislocatedatthetransitionalbeltbetweenthecontinentalcrustandtheoceaniccrust.Itstillhasthestructuralcharactersofthecontinentalcrust,andnoformationoftheoceaniccrust,butthecrustofthecentraltroughhasbecometothinningdown.TheRyukyuarc-trenchzonebelongstothetransitionaltypecrustasawhole,buttheoceansideofthetrenchalreadybelongstotheoceaniccrust.AndthenorthwestPhilippineBasintotheeastoftheRyukyuTrenchabsolutelybelongstothetypicaloceaniccrust.
简介：ThestudiesonthestructureandphysicalpropertiesoftheEarth'sinteriordonebyChinesegeophysicistsfrom1999to2002werereviewedinthispaper.Itincludesseveralresearchareas:thestructureoftheEarth'sinteriorsusingseismictomography,anisotropyoftheuppermantleinChinaanditsadjacentareas,qualityfactorQβforSwaves,subductionzone,mantlediscontinuities,physicalpropertiesofEarth'smaterialsandothers.Thereviewconcernsmainlythecontents,themethodsandtheresultsofthestudies.ItcanbeseenthatnewprogressinthestudyonthestructureandphysicalpropertiesoftheEarth'sinteriorhasbeenmadeinthelast4yearsinChina.Itisshownonthreeaspects:advancementmadeonsomepreexistentareas;pioneeringonsomenewfieldsandnewmethodsadopted.
简介：Adetailthree-dimensionalPwavevelocitystructureofBeijing,TianjinandTangshanarea(BTTarea)wasdeterminedbyinvertinglocalearthquakedata.Intotal16048Pwavefirstarrivaltimesfrom16048shallowandmid-depthcrustalearthquakes,whichoccurredinandaroundtheBTTareafrom1992to1999wereused.ThefirstarrivaltimesarerecordedbyNorthernChinaUnitedTelemetrySeismicNetworkandYanqing-HuailaiDigitalSeismicNetwork.Hypocentralparametersof1132earthquakeswithmagnitudeML=1.7~6.2andthethree-dimensionalPwavevelocitystructurewereobtainedsimultaneously.TheinversionresultrevealsthecomplicatedlateralheterogeneityofPwavevelocitystructurearoundBTTarea.Thetomographicimagesobtainedarealsofoundtoexplainotherseismologicalobservationswell.
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简介：Basedonunifiedequivalentharmonicloadingonseabedfoundationandenergyapproachsuggestedbytheauthors,thedevelopmentofdynamicporewaterpressureandstabilityofsoilfoundationforthevibrationofoceangravitystructuresexcitedbyrandomwaveloadingareanalysed.Itmaybeseenthatthepresentmethodforthestudyofdynamicproblemsofoceangravitystructuresoilfoundationsismorereasonableandconvenient.
简介：Inthispaper,anewconceptcallednumericalstructureofseismicdataisintroducedandthedifferencebetweennumericalstructureandnumericalvalueofseismicdataisexplained.Ourstudyshowsthatthenumericalseismicstructureiscloselyrelatedtooilandgas-bearingreservoir,soitisveryusefulforageologistorageophysicisttopreciselyinterprettheoil-bearinglayersfromtheseismicdata.Thistechnologycanbeappliedtoanyexplorationorproductionstage.ThenewmethodhasbeentestedonaseriesofexploratoryordevelopmentwellsandprovedtobereliableinChina.Hydrocarbon-detectionwiththisnewmethodfor39explorationwellson25structuresindicatesasuccessratioofover80percent.Thenewmethodofhydrocarbonpredictioncanbeappliedfor:(1)depositionalenvironmentofreservoirswithmarinefacies,delta,ornon-marinefacies(includingfluvialfacies,lacustrinefacies);(2)sedimentaryrocksofreservoirsthatarenon-marineclasticrocksandcarbonaterock;and(3)burialdepthsrangefrom300mto7000m,andtheminimumthicknessofthesereservoirsisover8m(mainfrequencyisabout50Hz).
简介：Inthispaper,usingHolland’smethod,theeffectofthehorizontalstructureoftropicalcyclonesontheirmotionisinvestigated.The"characteristicradius",r0characterizedasthehorizontalstructureofatropicalcyclone,inwhichmandparetheparametersofthevortex,hasbeenfoundbytheauthor.Andthenithasbeenshownthatthereisbutone"characteristicradius"foreachcyclonewithhorizontalstructure.Twodirectanalyticsolutionsfortheuniformandnon-uniformbasicflowsinsteadysituationsarepresentedwithrcResultsshowthatthechangeinthehorizontalstructureofthetropicalcycloneitselfwillhaveobviouseffectonthecyclonemotion,onbothitsdirectionandspeed.Thereforeitmustbeconsideredintheresearchonthetropicalcyclonemotion.
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