简介：Inthispaper,theauthorsputforwardabriefandpracticalarithmeticforautoextractingterrainlinesfromdigitalterraindataafteranalyzingandcomparingcurrentarithmetics.Thispapergivesanexperimentresultthattheridgeandvalleyextractedbythearithmeticisconsistentwiththeexperimentalterrain.

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简介：Inthispaper,wecalculatedmulti-scaleresidualgeoidanomalieswiththemethodofgeoidseparationprocessing,accordingtoEGM2008ultra-highordergravityfieldmodel,remove-restoretechniqueandStokesintegral.TheEastAsiancontinentalmarginwasselectedasthestudyarea.Theresidualgeoidanomalieshavebeencalculatedbyprogramming.Onthebasisofresidualgeoidanomaliesatvariousorders,theinterlayergeoidanomaliesatdifferentdepthswerecalculatedtodepictthespatialdistributioncharacteristicsoftheresidualgeoid.Finally,weconductedadetailedgeophysicalinterpretationforthestudyareaaccordingtothegeoidanomaliesincombinationwithothergeophysicaldatasets.Fourconclusionscanbeoutlinedasfollows：1）itisimpracticablethatgeoidanomaliesareusedintheinterpretationoftheshallowobjectsduetotheinfluenceoftheterrain;2）theanomaliesofresidualgeoidcanreflecttheintensityofsmall-scalemantleconvectionintheasthenosphere;3）theinterlayergeoidanomaliescanreflectthemagmaticactivitiesassociatedwiththemantleconvectionandmantleplumeindifferentscales;4）thestudyofthegeoidmayprovideanapproachfortheresearchofthesubductionzone,mantleconvectionandmantleplume.

简介：Withtheaimtothequantificationofanomalyidentificationandextractionforobservedoranalyzedrecords,wepresenttwostatisticalmethodsofearthquakecorrespondingrelevancyspectrum(ECRS)andslidingmeanrelevancy(SMR).WithECRSmethod,wecanobtaintheabnormalconfidenceattributeofdataindifferentvalueranges.Basedontherelevancyspectrumindifferentstudiedtime-intervals,weconverttheoriginaltimesequenceintorelevancytimesequence,andcanobtaintheSMRtimeseriesbyusingthemulti-pointcumulativeslidingmeanmethod.Thenwecanidentifytheseismicprecursoranomaly.Wetestthismethodbytakingthetimesequenceofη-valueinthenorthernTianshanregionasoriginaldata.Theresultshowsthatwhenthestudiedtime-intervalis18months,theprecursoranomalycanbeidentifiedbetterfromslidingmeanrelevancy.Theanomalycorrespondingrateis83percent,theearthquakecorrespondingrateis86percent,andtheanomalyischaracteristicofthemiddleterm.Totrytheresearchonmulti-parametercomprehensiveapplication,wetaketheKalpintectonicblockinXinjiangasourstudiedregion,andanalyzethespatialandtemporalabnormalcharactersofmulti-parameterslidingextreme-valuerelevancy(MSER)beforemid-strongearthquakesintheKalpinblock.TheresultindicatesthatECRSandSMRsequenceindifferenttime-intervalscannotonlybeusedtoidentifytheprecursoranomalyofsingle-itemdata,butalsoofferthedataofquantitativesingle-itemanomalyforcomprehensiveearthquakeanalysisandprediction.

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简介：自从2003，这篇论文考察中央规模天气动力学的主要理论进步，包括：(1)平衡并且失衡的流动的动态机制被使用学习中央规模循环的开始和发展问题。对称的不稳定性和横向波浪的不稳定性在线和旋涡空气传送对流被分析，并且进一步的研究在非线性的对流对称的不稳定性上被做了。在强迫对流和不稳定的传送对流和中央规模运动的波浪特征之间的相互作用也被讨论。(2)动态边界层建模的中间的空气被开发。复杂非线性的相互作用在大气的边界层和自由大气层之间理论上被分析。低级前面的地形学边界层和另外的边界层的结构动态问题被讨论。(3)在东亚空气发行量的背景下面的meso-β-scale暴风雨的形成和发展与MPV(潮湿的潜在的涡度)的变化被诊断异例。，并且在潮湿的空气。

简介：Thispaperproposesthatonthebasisofnear-sourcesaturationcharacteristicofgroundmotion,thepeakgroundmotionaccelerationandtheaccelerationresponsespectraofdiffuseearthquakesaffectingthenuclearfacilitysitecanbedeterminedbythestatisticmethod.Inviewoftheproblemofinsufficientstatisticsamplesduetofewerqualifiedstrongearthquakerecordsonthebedrocksite,italsoproposesthataccordingtothefeaturesofgroundmotionresponseofthesoil,theaccelerationrecordsonthesoilsitecanbetransformedintotheequivalentaccelerationrecordsonrocksiteforasimultaneousstatisticanalysistogetherwiththerecordsonrocksite.Consequently,wehaveobtainedbythismethodthenear-sourcepeakaccelerationandtheaccelerationresponsespectraofsmallandmoderateearthquakesonthesitethatcouldmeettheneedofnuclearfacilityandmadeacomparativeanalysistotheresultsfromrelevantresearches.Thisnewmethodfordeterminingdiffuseearthquakesisonlypreliminarilyverifiedinthepaperandfurtherresearchisneededforpracticalapplication.

简介：ThisarticleaddressessedimentresearchcarriedoutfortheThreeGorgesProjectsince1993,whentheconstructionoftheprojectwasformallystarted.Emphasisoftheresearchhasbeenplacedonthesolutionofrelevantproblemsarisingfromdesignandconstructionofvariousstructures,includingsedimentationproblemsintheChongqingreach;layoutoftheupperlockapproachchannelandwaysandmeanstomitigateitsdeposition;increasingreservoircapacitybyoptimizingreservoiroperation;compensatingdepthofflowrequiredbynavigationbelowtheGezhoubaProjectcausedbyscouring;mitigationofadverseeffectsoferosiononthereachfromZhichengtoJiangkou;andevaluatingscouroftheJinjiangreachcausedbyreleasingflowsoflowconcentrationsfromtheTGP.Inaddition,reductionofthesedimentloadenteringintothereservoirareaoftheTGPintherecentyearsaswellasthatexpectedoftheprojectedconstructionoflargehydropowerstationsontheJinshaRiverupstreamoftheTGPreservoirisalsonotedanddiscussed.

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简介：TheenergyradiationprocessofanairgunseismicsourceinlandreservoirisstudiedbasedontheunderwaterwaveletdatacollectedintheairgunexcitationexperimentsinBinchuan,Yunnan,China.Theempiricalformulaforcalculatingthebubblepulsationperiodandthemaximumradiusoftheunderwaterairgunseismicsourceisobtained.Theresultsshowthat:①Theenergyradiationefficiencyishigherverticallythanhorizontally.②Theverticalbubbleenergyradiationefficiencyincreaseswiththeincreaseoftheairsupplypressure.③Theverticalenergyradiationefficiencyoftheairgunseismicsourceis9.4%whentheairsupplypressureis15MPa.④Thehighertheairsupplypressure,thefurtherthepropagatingdistanceofthesuperposition-enhancedpressurewaveofanairgunsource.

简介：ThefatigueflexuralperformanceofRCbeamsattackedbysaltspraywasstudied.Atestingmethodinvolvingelectroosmosis,electricalacceleratedcorrosionandsaltspraywasproposed.Thiscorrosionprocessmethodeffectivelysimulatesreal-worldsaltsprayandfatigueloadingexertedbyRCcomponentsonseabridges.FourRCbeamsthathavedifferentstressamplitudesweretested.ItisfoundthatdeteriorationbycorrosionandfatigueloadingreducesthefatiguelifeoftheRCanddecreasestheabilityofdeformation.Thefatiguelifeanddeflectionabilitycouldbereducedbyincreasingthestressamplitudeandthecorrosiondurationtime.Thetestresultdemonstratesthatthisexperimentalmethodcancouplecorrosiondeteriorationandfatigueloadingreasonably.ThisproceduremaybeappliedtoevaluatethefatiguelifeandconcretedurabilityofRCcomponentslocatedinanaturalsaltsprayenvironment.

简介：Taolinglead-zjncdepositsarelocatcdinthcdismantlingfaultbeltonthenorthflankofDayUnshanrockmasslLiniangcountry,Hunanprovincc.Theyarelargescaledcpositscontrollcdbythedisman-tlingfautbclt’Theycosistoffivcindustrialorcbodics-DujiachongVinkongsban,Shangtangcbong,GuanshanandDuanshanorebody,andstrctchmorctl

简介：ＡＮＯＶＥＲＶＩＥＷＯＮＴＨＥＲＥＳＥＡＲＣＨＰＲＯＧＲＥＳＳＯＦＳＯＭＥＡＳＰＥＣＴＳＯＦＡＴＭＯＳＰＨＥＲＩＣＳＣＩＥＮＣＥＳＩＮＣＡＭＳＤＵＲＩＮＧＬＡＳＴＦＩＶＥＹＥＡＲＳＣｈｅｎＬｉａｎｓｈｏｕ（陈联寿）ＡＮＯＶＥＲＶＩＥＷＯＮＴＨＥＲＥＳ...

简介：Ｔｈｅｒｅｓｅａｒｃｈｏｎｔｈｅｓｐａｃｅ┐ｔｉｍｅｃｏｈｅｒｅｎｃｅｏｆＸｉａｎｓｈｕｉｈｅｆａｕｌｔｚｏｎｅｉｎｔｈｅｐｒｏｃｅｓｏｆｓｅｉｓｍｏｇｅｎｙＳＨＩ－ＢＩＡＯＷＡＮＧ（王时标）ＺＨＥＮ－ＸＩＮＧＹＡＯ（姚振兴）Ｉｎｓｔｉｔｕｔｅｏｆ...

简介：一个潮模型(命名DN1.0)它在中国海和西北太平洋上包含12主要成分被从1993～2002拿的沿着轨道泛音分析withTOPEX/Poseidon测高法数据估计。CSR3.0，FES95.2和DN1.0areusedrespectively到detide为在YellowSea，华东海，华南海和西北太平洋的海水平异例(SLA)的时间系列的数据。SLA曲线和力量光谱在中国海在SLA存在的主要部件从潮的错误产生的密度表演当模特儿。

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简介：Inthisarticle,werelocatedtheseismicsourcelocationoftheearthquakesintheMuliareaofSichuan,invertedthefocalmechanismofthelargerearthquakesandanalyzedtherelationshipbetweenthewaterleveloftheJinpingreservoirandthefrequencyoftheearthquakeswarm.Theresultsshowthat:(1)Theepicentersoftherelocatedsmallearthquakeswarmsaredistributedinaseismiczone,andtheearthquakefocaldepthswereintherangeof0-12km.(2)Byanalyzingtheearthquakeswarmspatialdistribution,wefoundthattheswarmsweregeneratedbyonebranchfaultonthewestofXiaojinhefault.(3)Thefocalmechanismofthethreeearthquakeswithmagnitudegreaterthan4.0issignificantlydifferent,withtheshallowsourcethrusteventsaffectedbyverticalstress,andthestrike-slipeventsarerelatedtoregionalstresstectonicactivity.