简介：Althoughseismicgaptheoryplaysanimportantroleinthemed-andlong-termearthquakeprediction,thepotentialriskofthenon-seismicgapinhistoricalearthquakeruptureareaswillneedtobesimultaneouslytakenintoaccountinthestudyofmed-andlong-termearthquakeprediction,duetothetemporallyclusteringornon-linearbehavioroflargeearthquakerecurrence.Inordertoexploretechnicalmethodswhichcanbebasedonobservationaldata,andidentifyhistoricalearthquakerupturezones(includingtheseismicgapinhistoricalandprehistoricearthquakerupturezones),weselecteighthistoricallargeearthquakerupturezoneswithdifferentelapsedtimesonthemid-northsegmentoftheNorth-SouthSeismicBelttomakequantitativeanalysisonthecharacteristicsofmodernseismicityofthesezonesandpreliminarilyexploretheseismicitymethodfordeterminingtheurgencydegreeofpotentialearthquakehazards.Theresultsmainlyshowthatthepvalue,whichreflectstheattenuationofearthquakesequence,andthea-value,whichreflectstheseismicityrate,arestronglyrelatedtotheelapsedtimeofthelatestearthquakeintherupturezone.However,thecorrespondingrelationshipsinsomeruptureareasarenotclearperhapsduetothecomplexfaultstructureandfaultingbehavior.Theb-value,whichrepresentsthestateoftectonicstressaccumulation,doesnoteasilyreflecttheelapsedtimeinformationofdifferentevolutionstages.Theb-valuetemporalscanningshowsasteadyevolutionovertimeinmostoftherupturezones,butintherupturezoneoftheWuduM8.0earthquakeof1879,theb-valueshowssignificantfluctuationswithadecreasingtrendfor20years.Bycomparativeanalysis,weconcludethattherupturezonesofthe1933M7.5Maoxianearthquakeandthe1976M7.2Songpan-Pingwuearthquakearestillinthedecayingperiodofearthquakesequences,andthusdonothavethebackgroundforrecurrenceofM7.0earthquakes.Thelowb-valueMaqusegment,whichislocatedatthenorthmarginoftherupturezoneof

简介：大气、海洋的条件在西方的向北和平的热带气旋(TC)的生命周期的不同阶段期间被检验，与理解环境怎么影响在这个区域的TC的紧张变化的意愿。内在的海表面温度(SST)什么时候比26高，被发现增强通常发生

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简介：Usingruralsurveydatafortheyear2009,weprovideevidenceofworkchoicesofrurallaborersinecologicallyvulnerableareasinNorthChina,andmodelthesechoicesasafunctionofcharacteristicsofindividuals,households,andlandendowments.Thefindingsreveallargedifferencesbetweenmalesandfemales,andbetweennon-farmemploymentandpart-timefarmingengagementLandscarcityisstillanimportantdrivingfactorinnon-farmingparticipationofrurallaborersinthestudyarea;andinthecurrentcaseoflandproductivityandthetotalamountofland,therearestillsurplusrurallaborforcesinthestudyarea.Diversificationoflivelihoodreducesthepressureonland,thusfacilitatingecosystemconservation.So,thepaperconcludeswiththeargumentthatestablishingcoordinationmechanismsamongnon-farmemploymentofrurallaborers,agriculturalproduction,andrestorationofecosystemsareessentialformitigatingtheconflictsofecologicalsecurity,agriculturalproduction,andruraldevelopmentinmisarea.

简介：Inductivelycoupledplasmamassspectrometry,inductivelycoupledplasmaopticalemissionspectroscopy,hydridegeneration-atomicfluorescencespectrometry,emissionspectrometry,Xfluorescencespectrometry,andX-raydiffractionwereemployedtostudythegeochemistryandmineralogyofcoalganguesfromNos.2,3,and8coalseamsoftheDu’erpingcoalmine,Xishancoalfield,Taiyuan,ShanxiProvince.Thestudyrevealedthatcomparedwiththesedimentarycover,uppercontinentcrust,Carboniferous-PermiancoalfromNorthChina,aswellasmostcoalinChina,coalganguesfromNos.2and3coalseamsarerichinLi,Be,Sc,Cr,Cu,Ga,Ba,Th,Nb,Cd,Pb,Taandrare-earthelements,andcoalganguesfromNo.8coalseamarerichinLi,Sc,V,Cr,Ga,U,andrare-earthelements.ComparedwiththeCarboniferous-PermiancoalfromNorthChinaandmostcoalinChina,coalganguesfromNos.2,3and8seamsarerichinRb,V,CsandSr.Therefore,TheDu’erpingcoalganguesintheXishancoalfieldarerichinmosthazardoustraceelementsandrare-earthelements,whereinthecontentsofGaandLireachtheindustrialgradeandhavesignificanceforindustrialutilization.Onthewhole,coalganguesoftheShanxiFormationfromthePermianarerichinmoretraceelementsthanthoseoftheCarboniferousTaiyuanFormation.ThedistributionsofREEshowobviouslydippingrightwardswithnegativeEuanomalies.Thecontentsofrare-earthelementsinthethreeseamsarequitedifferent.Alloftheaboveindicatethatthesourceoftherare-earthelementsisterrigenousdebris.MineralsinNo.2seamidentifiedbyX-raydiffractionmainlyincludequartz,kaolinite,inadditiontocalcite,pyrite,apatite,epidote,andepsomite.No.3seammainlycontainsquartz,kaolinite,inadditiontoasmallamountofsodiumfeldspar,calciumnitrate,ironore,gypsum,andvivianite.No.8seammainlycontainskaolinite,dickite,quartz,illite,andasmallamountofhematiteandU.Thecorrelationsbetweenmajorelementsandtraceel

简介：Accordingtofieldinvestigationandinterpretationofremotesensingimages,thenorthsegmentoftheLongling-RuilifaultisaHolocenedextralstrike-slipfaultwithasmallamountofnormalfaulting.Basedonlarge-scalegeologicalmappingatsometypicallocationsandquantitativegeomorphologicdeformationmeasurementanddatinganalysis,thisfaultisaHoloceneactivefault.Thestrike-sliprateoftheLongling-Ruilifaultis2.2~2.5mm/aandverticalsliprateis0.6mm/asincethelatePleistoceneepoch.Thestrike-sliprateoftheLongling-Ruilifaultis1.8~3.0mm/aandverticalsliprateis0.5mm/asincetheHoloceneepoch.BasedonthePoissonmodel,lognormalmodelandBPTmodel,theoccurrenceprobabilityofstrongearthquakesin50yearsisestimatedtobe6.32%,0.08%and0.05%,respectively.Then,a1.82%probabilityofoccurrenceofcharacteristicearthquakeforthenorthsegmentoftheLongling-Ruilifaultisobtainedbysettingaweightof0.28,0.36and0.36tothePoissonmodel,lognormalmodelandBPTmodel,respectively.

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简介：granulite外形的研究磁性和作文晚第三纪和太古代的大陆人摇的这份报纸在太古代的Huaian()地面在晚第三纪忍受捕虏体的Hannuoba()碱的暗岩和暴露的更低的外壳的节降低外壳(Wayaokou()-Manjinggou(侧面)，北诺思中国Craton。它为磁性的比较研究和两个的作文提供一个唯一的机会太古代并且晚第三纪大陆人更低的外壳。我们测量磁性的参数(危险性和磁性的磁滞现象参数例如浸透磁化Js，浸透等温的残余的磁化Jrs，和内在的coercivityHc)十一，Hannuoba从太古代的Huaian地面降低外壳的捕虏体和九地面granulites。结果显示一般水准珍视，太古代的granulites的Js和Jrs是4122洠条敮楴?業敮慲潬祧愠摮瀠瑥潲潬祧；衜?衜?

简介：Fivesetsofmodelsensitivityexperimentsareconductedtoinvestigatetheinfluenceoftropicalcyclone(TC)genesislocationandatmosphericcirculationoninterannualvariabilityofTCintensityinthewesternNorthPacific(WNP).Ineachexperiment,bogusTCsareplacedatdifferentinitiallocations,andsimulationsareconductedwithidenticalinitialandboundaryconditions.Inthefirstthreeexperiments,thespecifiedatmosphericandSSTconditionsrepresentthemeanconditionsofElNio,LaNia,andneutralyears.TheothertwoexperimentsareconductedwiththespecifiedatmosphericconditionsofElNioandLaNiayearsbutwithSSTsexchanged.ThemodelresultssuggestthatTCsgeneratedinthesoutheasternWNPincurredmorefavorableenvironmentalconditionsfordevelopmentthanTCsgeneratedelsewhere.ThedifferentTCintensitiesbetweenElNioandLaNiayearsarecausedbydifferenceinTCgenesislocationandlow-levelvorticity(VOR).VORplaysasignificantroleintheintensitiesofTCswiththesamegenesislocationsbetweenElNioandLaNiayears.