简介：TheRamanspectraofthenaturalendmembersofthegarnet-groupminerals,whichincludepyrope,almandineandspessariteofFe-Algarnetseriesandgrossularite,andraditeanduvaroviteofCa-Fegarnetseries,havebeenstrdied.MeasuredRamanspectraofthesemineralsarereasonablyandqualitativelyassignedtotheinternalmodes,translationalandrotatorymodesofSiO4tetrahedra,aswellasthetranslationalmotionofbivalentcationsintheXsite.ThestretchandrotatoryA1gmodesfortheFe-AlgarnetseriesshowobviousRamanshiftsascomparedwiththosefortheCa-Fegarnetseries,owingtothecationsresidingintheXsiteconnectedwithSiO4tetrahedrabysharingthetwoedges.TheRamanshiftsofallmemberswithineitheroftheseriesareattributedmainlytothepropertiesofcationsintheXsitefortheFe-AlgarnetseriesandintheYsitefortheCa-Fegarnetseries.

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简介：在这篇文章，七个月周围的噪音数据和10个事件从Ningxia在七个数字车站记录了()控制来源爆炸数据记录了由的地区性的地震网络和5500-t15暂时并且7个永久地震车站被用来测量基本模式瑞利波浪的分散曲线。学习区域与0.1杳慲散眠被划分成格子吗？

简介：TheresultsobtainedusingthegroupmodelofearthquakesgeneratedintectonicblocksarefurtherusedinthispapertoanalyzetherelationshipbetweentheMs≥7.0eventsinChinesemainlandandthemodulationandtriggeringfromtheearthtides.TheresearchshowsthattheMs7.0eventsinChinesemainlandhavebeensignificantlytriggeredbythetidalstress,especiallywithintheactiveperiodwithgroupstrongearthquakes.Inthequiescenceperiodofstrongearthquakes,noMs7.0eventsweretriggered,whilewithintheactiveperiod,over82.4%ofstrongearthquakestookplacewithinaspecialmoonphase,whichis36.4%higherthantheaverage.Therefore,themodulationandtriggeringoftidalstresscanbeusedtodistinguishtheactiveperiodsandtoforecastthetimeofthestrongearthquakeswithintheactiveperiod.Therelationshipbetweenthetidaltriggeringandthetectonicdynamicconditionisinvestigatedandthemechanismofthemodulationissimulatedwiththegroupmodelofearthquakesgeneratedintectonicblocks.

简介：Basedonthe1stordercnoidalwavetheory,thewavediffractionaroundthepiergroupinshallowwaterisstudiedinthispaper.Theformulasforcalculatingthenonlinearwaveforcesarealsopresentedhere.Inordertoverifythetheoreticalresults,modeltestsareconductedinthewaveflumeinTheStateKeyLaboratoryofCoastalandOffshoreEngineeringlocatedinDalianUniversityofTechnology.TherangeofthewaveparametersintheexperimentsischaracteristicwaveperiodTg/d1/2=8.08-22.86,characteristicwaveheightH/d=0.10.45.Theresultsobtainedfromtheexperimentsagreewiththetheoreticalresultsquitewell.Itisshownthat,inshallowwaterthenonlinearwaveforcesactingonapiergrouparegreaterthanthosecalculatedbylinearwavetheory,thevalueofincrementinwaveforceincreaseswiththeincreasesofthenonlinearityofthewave.Inthewaverangestudiedinthispaper,thenonlinearwaveforcecanreachover4timestheforcecalculatecdbylinearwavetheory.Thus,itissuggestedthat,whenTg/d1/2>8,thewaveforceonthepiersinthepiergroupinshallowwatershouldbecalculatedbyusingthecnoidalwavetheory.

简介：Thispaperanalyzestheadvantagesanddisadvantagesoftwotechni-callinesforautomaticgroupgeneralizationofcontourlines.Theauthorsuggeststhatitispossibletogetfasterandbettergeneralizationresultsifwesimulatetheintelligenceofhumanexpertsinprogramdesigning,retrievegeomorphologicalstructuralinformationusingtheinputdataof2-Dcontourlinesandderiveandoutputthegeneralied2-Dresultsdirectly.

简介：我们是否用声学的记载的工具测量阶段或组速度，仍然被说服。在这份报纸，三种模型被用来由理论分析和数字模拟调查这个问题。首先，我们使用与不同速度包含二个飞机波浪的飞机波浪重叠模型并且能改变阶段速度和组速度的价值。数字结果看那阶段速度是否比组速度更高或低，用缓慢时间连贯(STC)我们能仅仅给阶段速度的方法。根据分散分析和分支切割集成的结果，当组速度由到达时间拣获得了时，第二在僵硬边界地上凿穿为分散曲线的结果和STC方法获得的速度是阶段速度的一阶的模式表演的波形建模。最后，偶极子登录一个慢形成模型用分散分析和真实轴的集成被调查。分散曲线和完整的波浪火车的结果与僵硬边界条件作为地上凿穿模型显示出类似的结论。

简介：TheWorkingGrouponInternationalBorders---GeoenvironmentalConcerns(IBC)wasestablishedinlate2003andoperatesundertheauspicesofTheIUGSCommissiononGeologicalSciencesforEnvironmentalPlanning(COGEOENVIRONMENT).Thefollowingisabriefreportofthefirstyear'sactivitiesoftheIBCduring2003.

简介：Settlingvelocityisafundamentalparameterinsedimenttransportdynamics.ForuniformPar-ticles,thereareabundantformulasforcalculationoftheirsettlingvelocities.Butinnaturalfields,sedi-mentconsistsofnon-uniformparticles.Theinteractionamongparticlesiscomplexandshouldnotbeneg-lected.Inthispaper,basedontheanalysisofsettlingmechanismofnon-cohesiveandnon-uniformparti-cles,atheoreticalmodeltodescribesettlingmechanismisproposed.Besidessuspensionconcentrationandupwardturbulentflowcausedbyotherparticles,collisionamongparticlesisanothermainfactorinflu-encingsettlingvelocity.Byintroducingthecollisiontheory,equationsoffallvelocitybeforecollision,colli-sionprobability,andfallvelocityaftercollisionareestablished.Finally,aformulausedtocalculatetheset-tlingvelocityofnon-cohesiveparticleswithwidegraingradationispresented,whichagreeswellwiththeexperimentaldata.

简介：Inthiswork,wefocusonassessingthegroupeffectoflocalizedcorrosionontheultimatestrengthofthemarinestructuralplatesandstudytheload-deformationbehaviorsofplatesofvariousslendernessanduniaxialcompression.Meanwhile,weinvestigatedifferentcorrodedpatternsfromasinglecircularpitto25circularpitsdistributedovertheplateandcarryouthundredsofnonlinearfiniteelementsimulationsbycombiningthenumber,depth,distributionofpitswithimperfectionsandslendernessofplate.Thedistributionofmultiplepitscausesscatteringofstressconcentrationontheplate,thentheplasticsectionofplatechangeswithwiderdistributionofdamagesimultaneously.Theultimatestrengthariseswhenun-loadingzonecomprisedoftheyieldingstripsandholesextendsacrosstheplate.Itcanbeconcludedthatthecorrodedconditiondefinedasgroupeffectofpitsmanipulatesthedeformationstateandtheloadingcapacityofplateattheultimatestrengthmodethatcoincideswiththeproportionofeffectiveloadingareaandsectionintheprocessofpost-buckling.Tovalidatetheeffectofpitsgroup,weperformthenumericalexperimentsofthepost-bucklingofsteelplatescontainingpitsinarowwithdifferentorientation.

简介：SpatialscanningisdonefortworegionsinChineseMainland,wheredisplayedadenseprecursorynetworkduring1994～1998.Thetworegionsarethemid-southernsegmentoftheNorth-southseismicbelt(20°～35°N,95°～110°E)andNorthChina(36°～42°N,110°～120°E).Wetook0.5°×0.5°asaspatialwindowwithastepof0.25°and4monthsasatemporalwindowwithastepof1month.Forthetworegions,theanomalydensityisscannedfrom1994and1995respectivelyinthetworegions.TheprecursoryanomaliesareallfromtheDivisionofSeismicTrendinChinaandtheDivisionofSeismicTrendintheCapitalArea,CenterforAnalysisandPrediction,ChinaSeismologicalBureau.Aseismogenictectonicmodelisintroducedtoexplainthescanningresults.Inthemodel,thefrictionalstrengthofthefocalsourcesisdistributedrandomly.Aftertheboundaryplatemotionrateandallothergeologicalparametersaregiven,thestressofthesourcesinthesystemchangesinhomogenouslyduetothevariationofthefrictionalstreng

简介：Threemethodsofextractingtheinformationofanomaliesofaprecursorygroupareputforward,i.e.,themathematicalanalysesofthesyntheticinformationofearthquakeprecursors(S),theinhomogeneousdegreeofprecursorygroups(ID)andthevaluesofshort-termandimpendinganomalyinnear-sourcearea(NS).Usingthesemethods,wecalculatetheobservationaldataofdeformation,undergroundfluidandhydrochemicalconstituentsobtainedfromdifferentseismicstationsintheSichuan-YunnanregionandconcludethatthesyntheticprecursoryanomaliesofasinglestrongearthquakewithMs6.0differgreatlyfromthoseofthegroupedstrongearthquakes,fortheanomalousinformationofprecursorygroupsaremoreabundant.ThethreemethodsofextractingthesyntheticprecursoryanomalyandtherelatednumericalresultscanbeappliedintothepracticeofpredictiontothegroupedstrongearthquakesintheSichuan-Yunnanregion.Inhomogeneousdegree(ID)ofsyntheticprecursoryanomalycanbeidentifiedautomaticallybecauseittakesthethresholdofdistributivecharacteristicsoftheanomaliesofprecursorygroupasitscriterionforanomaly.

简介：Pseudopleuronectesyokamae(Günther)isoneofthemostimportanteconomicfishspeciesinthegenuslivingspeciallyinthenorthwestPacific,andisdistributedinthesouthernareaofthefareastseaofRussia,Japan,Korea,theHuanghaiSea,theBohaiSeaandthenorthernareaoftheEastChinaSea.Usuallytheyliveinnearshorewatersoftheseareasasgeographicsubpopulations.P.yokamaeintheSheathBaybelongstoalocalgroupoftheHuanghai-BohaiSeasubpopulationandisdistributedinthemouthandadjacentwatersofthebayalltheyearround,andthecatchofitsspawninggrouphas

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简介：Lomagundi-Jatuli事件(LJE)是保存13C在在世界范围的Paleoproterozoic碳酸盐的+5和+16之间的carb价值。然而，这些旅行的持续时间，振幅和模式仍然保持糟糕抑制了。在北方中国Craton的2.14-1.83GaHutuo组是一>10km厚火山--沉积顺序，包括>5km在在上被扔的厚保存得很好的碳酸盐--对亚tidal环境潮汐。碳酸盐的152件最不改变的样品的公司同位素、元素的分析揭示了三阶段的13C进化。它以只积极的13Ccarb(+1.3到+3.4)在Dashiling和Qingshicun形成在~上演2.1Ga碳酸盐，从积极价值由转变列在后面到震荡在~的积极、否定的价值3000mWenshan，Hebiancun，Jianancun，和Daguandong形成的厚碳酸盐，并且与只否定的13C保存在的carb价值>500mHuaiyincun和Beidaxing形成的厚dolostones。看来许多LJE，特别地那些极其积极的13Ccarb信号，没在Hutuo碳酸盐被记录。只积极的13Ccarb价值(+1.3到+3.4)多半在更低的形成保存了对应于LJE的目的，而随后二个阶段反映LJE和Shunga-Francevillian事件(SFE)的发作的余殃。现在的数据点到碳上的氧的增加的影响从Doucun骑车到Dongye亚群并且证明在北方中国Craton的LJE的结束与在Fennoscandia和南非的那些是将近同时的。

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简介：SystematicgeochemicalstudiesoftheProterozoicLengjiaxiGroupinnortheasternHunanProvincesuggestthattheLengjiaxiGroupisaAu-As-Sb-Wassociation-typeAu-bearingturbiditeformation.ThecontentsofAu,As,Sb,W,Cr,Mn,PbandZnintheturbiditeformationaremorethantwotimesashighastheaveragecontentsoftraceelementsintheuppercontinentalcrust.ThelowabundanceofAgandtheclosecorrelationbetweenAuandAsaretwoimportantcharacteristicfeatures.IntheAu-bearingturbiditeformationtheenrichmentofgoldisduetotheextensiveoccurrenceofAu-bearingpyrites.HighercontentsofAu,W,SbandAginthegreywackeindicatethattheyalsoexistintheformofheavyminerals.Au,Ag,As,Sb,WandREEintheAu-bearingturbiditeformationhaveaclosegeneticrelationwiththechemistryofthegolddeposits.

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简介：Two-monthcontinuouswaveformsof108broadbandseismicstationsinFujianProvinceanditsadjacentareasareusedtocomputenoisecross-correlationfunction(NCF).ThesignalqualityofNCFisimprovedviatheapplicationoftime-frequencyphaseweightedstacking.TheRayleighandLovewavesgroupvelocitiesbetween1s-20saremeasuredonthesymmetricalcomponentoftheNCFwiththemultiplefiltermethod.Morethan5,000Rayleighwavedispersioncurvesandabout4,000Lovewavedispersioncurvesareobtainedandusedtoinvertforgroupvelocitymaps.Thisdatasetprovidesabout50kmresolutionthatisdemonstratedwithcheckerboardtests.Consideringtheoffgreatcircleeffectininhomogeneousmedium,theraypathistracedbasedonthetraveltimefieldcomputedwithafinitedifferencemethod.Theinvertedgroupvelocitymapsshowgoodcorrelationwiththegeologicalfeaturesintheupperandmiddlecrust.TheFuzhoubasinandZhangzhoubasinshowedlowvelocityontheshortperiodgroupvelocitymaps.Onthelongperiodgroupvelocitymaps,thelowvelocityanomalyinthehighheatflowregionnearZhangzhouandclearvelocitycontrastacrosstheZhenghe-Dapufaults,whichsuggeststhattheZhenghe-Dapufaultmightbeadeepfault.

简介：Inthispaper.itisdemonstratedthatthereexistmarinehorizonsintheupperpartofthelowersubcycleandtheuppersubeycleoftheKizilsuGroupinXinjiang.basedonnewevidenceofauthigenicglauconite.boroncontent.carbonandoxygenstablcisotopicanalyses.andlithologicalandsedimentaryfeatures.Theup-perpartofthelowersubeycleisthelowermostmarinehorizonoftheCretaceousinthewesternTarimBasin,whichisinferredtobeofBarremianage.