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177 个结果
  • 简介:Thispaperextendstheresourcedragstudiesbyempiricallyinvestigatinghowspatialfactorsaffecttheregionaleconomicgrowth.Usingspatialpaneleconometricmodels,thispaperestimatesthedraggingeffectofenergyresourcesoftheYangtzeRiverDeltametropolitanareas.WefindthatthegrowthdragofenergyintheYangtzeRiverDeltaisabout6%onaverage,whichmeansthatenergyconstraintsdecreasetheeconomicgrowthby6%annually,higherthanthenationallevelthathasbeenpreviouslymeasuredintheliterature.Thisresulthastakenintoaccounttheimpactofneighboringcities’economicdevelopment,soastoobtainamoreaccurateestimate.Basedonthesemeasurementresults,weproposesomepolicyrecommendations.

  • 标签: ECONOMIC growth DRAGGING EFFECT SPATIAL econometri
  • 简介:Fromthepointsofviewofthetheoryofdiwa(geodeprcssion)mctallogenesisthispapermainlydca1swiththemeta11ogcnesisofsomcpolyInetallicandutaniumdcpositsinthcdjwaareasinGuangki.Thetermtransitiona1pliaschereisdcfincdastransitionalhorizons,transitional1ithology,transitionalzoneofstructurcandtransitionalpcriodof

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  • 简介:论文分析seismicity的精力地的变化特征2。1ML4。5在江苏和它的附近的区域在在1970年1月和2007年12月之间的时期期间。它也分析时间的变化“重量”主要典型精力地的系数,与地震精力使用随机的功能理论基于实验直角的功能(文件结束)扩大方法作为一块时空随机功能地回答。结果证明开始的七块典型的地的扩大精确性是0。9244。地震精力的力量在学习区域在不同的构造的块显著地变化。高价值区域在中间、南部的江苏,和南方黄海。典型领域的分发也证明是一个区域最显著地影响学习区域的地震精力领域。时间开始的六个典型领域的系数与时间改变的“重量”,和变化的振幅在这个区域与中等强壮的地震有强壮的时间的关联。

  • 标签: 地震活动 时空特征 江苏省 能量场 邻近地区 时间相关性
  • 简介:InordertounderstandthetypeandextentofmarinefoulinginoffshoreareassoutheastoftheZhujiang(Pearl)Riverdelta,withintheperiodformMay1986toJune1987,twobiologicalbuoysweredeployedatwaterdepthsof95mand113mlocatedin114kmand160kmoffthecoastofHongKong,respectively.Moreover,thefoulingcommunityofaMarexhydrologicalbuoylocatedin115mdepthwater172kmoffHongKongwasalsosurveyed.Theresultsshowthatatotalof78specieswerecollectedandidentified.Thepanelsexposedfor3monthsweremainlydominatedbystalkedbarnaclesConchodermahunteriandLepasanatiferaandhydroidsOrthopyxissp.Asforthebuoys,includingthesubsurfacebuoy,andtheirmooringsystemsexposedfor6and12months,respectively,somehardfoulerssuchascommonoysters,pearloysters,acornbarnaclesandbryozoanswerealsofound.Thecompositionsoffoulingcommunitiesalsovariedgreatlywithdepth.

  • 标签: 珠江三角洲 南海 航海污染 海上污染 水深 海上建筑物
  • 简介:Thispaperproposesamethodonanalyzingtheasynchronism-synchronismofprecipitationofdifferenthydrologicalregionsregardingtheS-to-NwatertransferareasofeasternChina.Thegeneralprocessoftheanalysisincludesthreesteps.Firstly,wecreatedtherainfallseriesoftheregionconcernedbycalculatingtheregionalaveragerainfallofthestationsintheareawiththehelpoftheclassicalThiessenPolygonmethod.Secondly,thestandardsofassessmentindicesforwetnessordrynessaresetaccordingtoGammadistributionfunctionwithacertainprobabilityP37.5%or62.5%givenrespectively.Finally,thefrequencyofninecombinationsarecountedasthequantitativefeatureofasynchronismandsynchronisminthreetimescales,thatistheyearly,seasonalandmonthlyscales.Theasynchronism-synchronismoftworegionpairshasbeenestimated.Theresultsshowthatthefrequencyofprecipitationasynchronismin1957-1998islargerthanthesynchronismfrequencyforboththeNorthChina-middleandlowerYangtzeRiverpairandfortheNorthChina-upperHanjiangRiverpair.Asforthesynchronismphenomena,thefrequencyofNd-Sdisratherlow.AsthecombinationsthataresuitableforwatertransfersareNd-Sw,Nn-Sw,Nd-SnandNn-Sn,thetotalfrequencyofthesecombinationsforNorthChina-middleandlowerYangtzeRiveris40%onanannualbasis,butonly28%inspringwhenwatershortagesaremostlikelytooccur.ThetotalfrequencyofthesecombinationsforNorthChina-upperHanjiangRiverisabout24%onanannualbasis,but35%inspringandwinter.Itshouldbenotedthatiffutureprecipitationpatternsaresimilartothatoftheperiod1957-1998,itisveryimportanttochangethenaturalcharacterofasynchronism-synchronismbyenhancingthecapabilityofhydro-projectsregulationandimprovingmanagementofthewatertransferproject.

  • 标签: 同步频率 异步的频率 South-to-North 水转移
  • 简介:BiostratigraphicaldataindicatethatintheneriticfaciesareasofSouthChina,theDevonian-Carboniferousboundary(DCB),matchingtheboundarybetweenconodontSiphonodellapraesulcatazoneandS.sulcatazone,shouldbedrawnbetweenrugosecoralCystophrentiszoneandPseudouralinazone,i.e.theCystophrentis\Pseudouralinainterval-zone.ThetopofthesealevelfalleventbedneartheDCBislowerthantheboundarybetweenS.praesulcataandS.sulcatazones,buthigherthanthetopoftheCystophrentiszone.SequencestratigraphicalstudyshowsthatthesealevelfalleventbedneartheDCBconstitutestheshelfmarginsystemtract(SMST)ofadepositionalsequence(SQ1)inbothneriticandpelagicfaciesareas.ThetopsurfacesofSMSTofSQ1isslightlylowerthanthebaseofS.sulcatazoneinthepelagicfaciesareas,InneriticfaciesareasofSouthChina,therefore,theDevonian-CarboniferousboundaryismarkedbythemostdistincttransgressivesurfacewithintheCystophrentis\Pseudoura

  • 标签: BOUNDARY DEVONIAN and CARBONIFEROUS integrated STRATIGRAPHY
  • 简介:BasedonthedataobtainedfromthecooperativesurveysbyChinaandNorwayfrom1984to1994,thispaperdealswiththehydrographiccharacteristicsofdidributionareasofanchovyintheYellowSeaandEastChinaSeafromNovembertoMay.Therelationshipsbetweendistributionofanchovyandhydro-graphicenvironmentarealsoanalysedinthispaper.Themainresearchfindingsarebrieflygivenbelow.(1)FromNovembertoMarch,thewatertemperaturecontinuallydecreasesandmeanwhilethedenseareasofanchovymovefromnorthtosouth.Thehighschoolingareasofanchovyaremainlydistributedinthewarmofcoldfrontareaswithtemperatureof11-13℃.(2)InNovemberandDecember,theYellwSeacoldwater-massexistsroughlybetween50mdepthandseabottom.Thethermo-baloclineisapproximatelylocatedatthe30~50mdepthandtheanchovyisusuallydistributedabovethethermo-haloclineInJanuaryandMarch,theYellowSeacoldwatermassdisappearsandthefishschoolsaredistributedatthemid

  • 标签: Oceanographic CONDITION ANCHOVY YELLOW SEA and
  • 简介:Usingruralsurveydatafortheyear2009,weprovideevidenceofworkchoicesofrurallaborersinecologicallyvulnerableareasinNorthChina,andmodelthesechoicesasafunctionofcharacteristicsofindividuals,households,andlandendowments.Thefindingsreveallargedifferencesbetweenmalesandfemales,andbetweennon-farmemploymentandpart-timefarmingengagementLandscarcityisstillanimportantdrivingfactorinnon-farmingparticipationofrurallaborersinthestudyarea;andinthecurrentcaseoflandproductivityandthetotalamountofland,therearestillsurplusrurallaborforcesinthestudyarea.Diversificationoflivelihoodreducesthepressureonland,thusfacilitatingecosystemconservation.So,thepaperconcludeswiththeargumentthatestablishingcoordinationmechanismsamongnon-farmemploymentofrurallaborers,agriculturalproduction,andrestorationofecosystemsareessentialformitigatingtheconflictsofecologicalsecurity,agriculturalproduction,andruraldevelopmentinmisarea.

  • 标签: work CHOICES rural LABORERS MULTINOMIAL LOGIT
  • 简介:Theparametersofhypocentrallocationareimportantfundamentaldataforthestudyofseismologyandtheearthinteriorphysics;amongthem,thefocaldepthisaveryimportantonebutcanhardlybemeasuredwithhigherprecision.Withtheincreaseofseismicstationsinnumber,theheighteningofobservationqualityandtheimprovementofdeterminationmethod,suchasituationhasbeenchangedmuch.Inthispaper,theresultsofhypocentrallocationandre-locationby7small-aperturedigitalseismicstationnetworksatTangshan,ZhangbeiandHuailaiofHebeiProvince,DatongofShanxiProvinceandJianchuan,LuquanandYao'anofYunnanProvinceareused.Usingtheseresultstogetherwiththoseoffocaldepthinversionbyfar-fielddataofsomeindividuallargeshocksincorrespondingareasandthosere-determinedbytheLinfentelemeteredseismicnetworkofShanxiProvince,acomparisonwiththeresultsoffocaldepthdeterminationinthepastearthquakecataloguesismade.Itisfoundoutthatthefocaldepthsdeterminedbythesmall-apertureseismicnetworksarebasicallydistributedintherangefromtheearthsurfacetoten-oddkilometersunderground.Incontrast,thefocaldepthsdeterminedinthepastaremostlydistributedatthedepthrangefromtheearthsurfaceto30kmunderground.Besides,thereisadifferenceof50%to100%betweentheaveragevaluesofthetwocases,whichisquiteanobviousone.Fromtheresultofanalysis,itisconsideredthattheresultsdeterminedbythesmall-apertureseismicnetworksmaybeclosertotherealityoffocaldepthsdistribution.Thatistosay,earthquakesintheabove-mentionedareasshouldbedistributedintheshallowpartofthecrust.Thecausesthatleadtotheabovesituationarediscussedpreliminarily,andsomesuggestionsandmeasuresforimprovingtheprecisionoffocaldepthdeterminationareputforward.

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  • 简介:Anumberofpreviousstudiesofacupunctureacupointspecificityhaveusedshamacupoints,shamacupunctureormeridianacupointsatagreatdistancefromeachotherascontrolsinfunctionalMRI(fMRI)experiments.However,fewstudieshavecompareddifferentmeridianacupointswithinthesamesegment,whichareassociatedwithsimilarlyintenseneedlesensations.WeperformedfMRIon12healthyyoungvolunteersandobserveddifferencesinbrainactivationelicitedbyacupunctureoftheTaixi(KI3)andQiuxu(GB40)acupoints.AcupuncturewasappliedattheTaixiandQiuxuacupoints,usingamultiple-blockfMRIdesignwiththreeblocks,involvingthreealternationsofrestingandtaskphases.Afterscanning,needlesensationwasassessed.ThebehavioralresultsrevealedthatthesubjectiveneedlesensationwassimilarbetweentheTaixiandQiuxuacupoints.ThefMRIresultsrevealedthatacupunctureattherightTaixiacupointactivatedtherightsuperiortemporalgyrus(BA22),leftmiddlefrontalgyrus(BA46)andinferiorfrontalgyrus(BA45),bilateralparietallobepostcentralgyrus(BA2),rightparietallobe(BA3),andleftparietallobe(BA40).AcupunctureattherightQiuxuacupointactivatedtheleftsuperiortemporalgyrus(BA42),rightparietallobepostcentralgyrus(BA40,BA43),rightinferiorfrontalgyrus(BA47),bilateralsuperiortemporalgyrus(BA22),andrightinsulaBA13.TheseresultssuggestthattherightTaixiandQiuxuacupointsactivateddifferentbrainareas.

  • 标签: 激活 脑区 GB 功能磁共振成像 针刺 取穴
  • 简介:Basedon49digitalseismogramsrecordedby73seismicstationsintheJiangsuTelemeteredSeismicNetwork,thepaperusesAtkinson'smethodtocalculatetheinelasticattenuationcoefficientoftheJiangsuarea.Wefindthatthefrequency-dependentQintheJiangsuregionisQ(f)=272.1·f~(0.5575).WealsouseMoya'smethodtoinvertthe63stations'siteresponses.Theresultsshowthatthesiteresponsesofthe25stationsinJiangsuareapproximately1atarangebetween1Hzand20Hz,whichisconsistentwiththeirbasementsonrocks.Theresponsecurvesofthesiteresponsesofthe14undergroundstationsaresimilartoeachother.Theirsiteresponsesshowanamplificationatlowfrequenciesandminimizationathighfrequencies.ThecalculationoftheBrunemodelonthewaveformdataofM_L≥2.5earthquakesfromJiangsuDigitalSeismicNetworkbetweenOctober2010andMay2015intermsofseismicsourceparametersof58seismicwavesshowsthattherearegoodcorrelationsbetweenseismicmagnitudeandothersourceparameterssuchasseismicmoment,sourceradiusandcornerfrequency,whilethecorrelationsbetweenseismicmagnitudeandstressdrop,andstressdropandsourceradiusarenotsogood.

  • 标签: 江苏地区 地震台站 震源参数 反应 Q值 邻区
  • 简介:Mountainousregionsfaceaseriesofconflictsbetweenthenaturalresourcesconservationandtheeconomicdevelopment,especiallyinprotectedareas,wherearethehometosomeofthepoorestpeopleintheworld.InChina,theProtectedAreasAuthorities(suchasProtectedAreasAuthoritiesofWuyiMountain)transferredthemountainouspeopleoutoftheprotectedareas.Wefoundthatitisnotagoodapproachofimmigrationproject,asfaraseconomicandecologicaleffectisconcerned.Althoughremoteandmajesticbeautyattractedmanytourists,masstourismisnotagoodapproachtosolvethedevelopmentprobleminmountainousareasbecauseitcannotprovideenoughopportunitiestomakelocalpeopleliveacomfortablelife,andthehighvolumeoftouristsindicatesthattheresourcesfacesignificantthreats.Becausemanylandscapesarerunbyprivateenterprises,localresidentsandgov-ernmentonlygetlimitedbenefits.Althoughecotourismprinciplesexpatiateoneconomicdevelopmentandresourcesconservation,localpeopleincomeandtouristsfeelings,ithasdiscordancebetweenthetheoryandthepractice.Therefore,thetermof'integratedecotourism'wascoinedinthepaperbasedontheecotourismtheory.Integratedecotourismmeansabroadlytourismresourcesandpendulumspatialpatternwhichwillcomeintobeingwiththemovementoflocalpeopleandtouristsfromprotectedareastothenearbytownorcity;anditalsotriestosolvethepropertyrightconflictofmountainlandbetweenthelocalpeopleandtheprivateenterprisesaccordingtopropertyrighttheory.

  • 标签: 移民 旅游业 生态经济 保护区域
  • 简介:ItisnowoneyearsincethedevastatingearthquakeinWenchuanofChina.Anexhibitionofchildren’spaintingsandphotographsonthetopicof'post-earthquakereconstruction'hasbeenheldjointlybytheChineseAssociationforInternationalUnderstanding,

  • 标签: 中国 地震灾区 日本 照片 绘画 儿童
  • 简介:在这研究,我们在在Sanggou海湾从文化区域收集的核心沉积估计了埋葬流动和碳的不同形式的来源约会,并且preliminarily为无机的碳埋葬流动的更大的比例分析了原因(BFTIC)。在Sanggou海湾的全部的碳(TC)的平均内容是2.14%。全部的器官的碳(TOC)在TC说明了一个小比例,哪个中的超过65%个源于源自陆地的器官的碳(Ct),并且当时导出水兵的器官的碳的比例(C自从大规模水产业的开始,)显著地增加了。全部的无机的碳(TIC)在挥舞从贝导出的小自然贝壳的时期(18801948)期间与最大值说明了TC,其一般水准是60%,的60%75%直到90%无机的碳(Shell-IC)。TC埋葬流动从31g/(m2e范围6.61orming和解释费用。为所有图象的严厉级别被一样执行20raters,2weeks分开,并且与图象演讲的顺序使随机化。Intra老鼠testretest可靠性,内部老鼠的可靠性,和构造有效性被分享的多范畴多老鼠kappa统计决定。残余级别为为沟的intra老鼠可靠性是优秀的(kappa=0.957吗??

  • 标签: 桑沟湾 养殖区 通量 埋藏 碳源 源解析
  • 简介:Dealingwiththeregionallandsurfacesheatfluxesoverinhomogeneouslandsurfacesinaridandsemi-aridareasisanimportantbutnotaneasyissue.Inthisstudy,oneparameterizationmethodbasedonsatelliteremotesensingandfieldobservationsisproposedandtestedforderivingtheregionallandsurfaceheatfluxesoverinhomogeneouslandscapes.Asacasestudy,themethodisappliedtotheDunhuangexperimentalareaandtheHEIFE(HeiheRiverFieldExperiment,1988-1994)area.TheDunhuangareaisselectedasabasicexperimentalareafortheChineseNationalKeyProgrammeforDevelopingBasicSciences:ResearchontheFormationMecbanismandPredictionTheoryofSevereClimateDisasterinChina(G1998040900,1999-2003).ThefourscenesofLandsatTMdatausedinthisstudyare3June2000,22August2000,and29January2001fortheDunhuangareaand9July1991fortheHEIFEarea.Theregionaldistributionsoflandsurfacevariables,vegetationvariables,andheatfluxesoverinhomogeneouslandscapesinaridandsemi-aridareasareobtainedinthisstudy.

  • 标签: 陆地表面 区域能量通量 干旱地区 半干旱地区 陆地卫星 遥感