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简介：ＰｒｅｃａｍｂｒｉａｎＭｅｔａｍｏｒｐｈｉｓｍｏｆＴｉｙａ－ＯｌｏｋｉｔＭｅｔａｍｏｒｐｈｉｃＢｅｌｔｉｎＮｏｒｔｈｅｒｎＢａｌｋａｌＲｅｇｉｏｎａｎｄｉｔｓＭｅｔａｌｌｏｇｅｎｙ￥Ａ．Ｉ．Ｓｉｚｙｋｈ；Ａ．Ａ．Ｂｅｌｏｇｏｌｏｖ（Ｄｅｐａｒｔｍｅｎ...

简介：Wepresentnewgeochemicaldatafortheuppermantleandcrustalsections(whole-rockmajorandtraceelementcompositions)aswellasmineralchemicaldata,fromtheNorthernCarbibbeanophiolitesintheHabana-MatanzasregioninWesternCuba.TheseophiolitesarepartoftheNorthernCubanOphioliticBelt(NCOB),extendingformorethan1000kmalongtheisland.Theuppermantleperidotitesarecomposedmainlyofrefractoryharzburgitewithtectonitetextures,andshowconvex-downwardpatternsdepletedinMREEnormalizedtochondritevalues(McDonoughandSun,1995).Thesegeochemicaltrendsarecharacteristicfordepletedmantlewedgeperidotitesmetasomatizedbyslab-derived,LREEenrichedmelts.TheNCOBalsoincludesabyssalperidotiteshavinglowerLREE/HREEratiosanddisplayingrelativelyhomogeneousandflatpatternsfromMREEtoHREE.Theseperidotitesrepresentfragmentsaccretedintothecontinentalmarginfromasubductedoceaniclithosphere.GabbroanddoleriteunitsintheNCOBaresystematicallydepletedinHighFieldStrengthElements(HFSE:Nb,Ta,Hf,Ti)andREEwithrespecttoN-MORB(<1XN-MORB).Theirmeltevolutionwasaffectedbysubductioninput.Spatiallyassociatedgraniticrockshaveavolcanicarcgeochemicalaffinity.SomemaficextrusiverockswithintheNCOBexhibitboniniticsignatures,andmayrepresenttheproductsofsubductioninitiationmagmatism,whereasotherextrusiverockoccurrencesdisplayN-MORBtoE-MORBgeochemicalfingerprints,slightlymodifiedbysubductionderivedfluids.Usingthesegeochemicaldataandconstraints,wepresentatectonomagmaticmodelfortheevolutionoftheNCOBwithintheframeworkoftheCaribbeangeology.

简介：联合适应收缩在有明显的垂直传导力的成像的可行区域的基因算法微分，我们转换了TEM传导性的薄层。倒置的结果证明由在可行区域的适应收缩，计算速度加速，计算精确改善。到某个程度，在这个方法，我们克服短暂电磁的发出声音等价和减少的等价范围。有前面的曲线的转换结果的比较清楚地证明我们能想象传导性的薄层。关键词短暂电磁的方法-基因算法-倒置-明显的纵的传导力-并且传导性的薄层首先写作在Chang鈥檃n的教授李秀大学。他从长春地质学学院在地球物理的探索从Xi鈥檃n地质学学院和BS(1982)在应用地球物理收到了M.Sc(1989)。他出版了超过30份报纸。他从事理论的研究和短暂电磁的领域的申请。他现在正在追求ph。在Xi鈥檃n交通大学的D。

简介：Gravityvariationdataobservedintheprocessofseismogenesisandoccurrencesofearthquakesshowthatthelocationwiththegreatestgravitychangesdoesnotnecessarilycoincidewiththeepicenter.Toexplainthiswedefinedthecenterofeffectivemassofstressvolumeas"hypocentroid",andtheverticalprojectionofwhichontheearth'ssurfaceas"epicentroid".Hereweadoptthreerotatingmodels,includingspheroid,ellipsoidandcylinder,torepresenttheregionofanimpendingearthquake.Basedonthemodelsofgravityvariationsinducedbyuniformdilatancy,epicentroidsassociatedwithsixteenearthquakeswithM>4.0occurredin1981～2000intheBeijing-Tianjin-Tangshan-Zhangjiakouregionaredeterminedbymeansofaproposedleastsquaresiterativeinversionmethod.Theresultsindicatethatcylindermodelispreferabletotheothertwo,andepicentroidsobtainedbythecylindermodelseparatefromtheepicentersbyarangeof0～40km.Epicentroidsareinevitablylocatedwithinintacttectonicblocks,andusuallyclusteringroups;whiletheepicentersaregenerallylocatedattheterminationsoffaultsorattheintersectionsoffaults.Itseemsthatthereexistearthquake-hatchingareasintheblockamongfaults.Earthquakeshatchintheseareas,butoccuraroundtheseareas,meanwhiletheexistenceoffaultsmayplayanimportantroleincontrollingtheprocesses.

简介：ThemineralresourcesexploitationstageandtheeconomicgrowthratearevariousindifferentregionsofXinjiangAutonomousregion.Usingthemethodoflocationquotient,thispaperidentifiesandclassifiestheintensiveregionsofthreetypesofmineralresources,knownascoal,oilandnaturalgas,respectively.Theintensiveregionsofeconomicgrowthwerealsoidentified,accordingtotherateofpercapitaGDPgrowthatprefecture,autonomousprefectureandcity.Therelationshipsbetweendifferentmineralresourcesandeconomicgrowtharedifferent,forexample,therelationshipbetweeneconomicgrowthandcoalresourceispositive,whiletherelationshipbetweeneconomicgrowthandoilresource,ornaturalgasresourceisnegative.ThisstudyempiricallyexaminestheeffectsofnaturalresourcesoneconomicgrowthofXinjiang.Theresultsshowthatwhilstnaturalresourceshaveapositiveimpactongrowth,andcanmakeanegativeimpactongrowththroughthetransmissionchannels,suchasinvestment,manufacture,humancapital,andscientificandtechnologicinnovation.Moreover,itstudiesthetransmissionchannels,thatis,theeffectofnaturalresourcesontheotherexplanatoryvariables,andcalculatestheindirecteffectofnaturalresourcesongrowthforeachtransmissionchannel,andcomprehensiveeffectsofnaturalresourcesongrowth.ThecalculatedresultofcomprehensiveeffectsindicatesthatthepositivedirecteffectsofnaturalresourcesongrowthareshowntooutweighthenegativeindirecteffectofXinjiangautonomousregion.

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简介：Thepropagationoffemtosecondlaserpulseswithwavelengthsof1550nm,1064nm,800nmand700nm,respectively,whichareinthenormaldispersionregionofthenano-structuredphotoniccrystalfiber(N-PCF)withinterestingbroadbandnormaldispersionandhighlynonlinearproperties,isstudied.Fortheeffectofchirpvariationmainlyinducedbygroupvelocitydispersion(GVD)andself-phasemodulation(SPM),afterpropagationoverashortlength,thewavebreakingoccurs.Namely,oscillatorystructuresarepresentednearpulseedgesandsidelobesappearinthepulsespectrum.Inthecaseof800nm,afterthepropagationof20mm,asuperflatspectrumisobtained.Thebandwidthofthesuperflatspectrumisassociatedwiththedispersionlengthandthenonlinearlength.BychoosingN-PCFandlaserpulsewithappropriateparameters,abroadbandsuperflatspectruminashortlengthcanbeachieved.

简介：Lanzhou,China,Sept.22-25th,2001(Firstcircularannouncement)Jointlyorganizedby:IALE-China;IALE-AustraliaColdandAridRegionsEnvironmental&EngineeringResearchInstitute,CASProgrammeCommittee:RichardHobbs(Australia),XiaoDuning(China)NobukazuNakagoshi(Japan),Sun-KeeHong(Korea),ParidaKuneepong(Thailand),ElenaKlimina(Russia),KalpanaBhakuni,(India),ZhanZhiyong(HongKong,China),Chun-YenChang(Taibei,China)ObjectivesandTopics:ATheoreticalaspectsandquantitativeapproaches(Landscapepatternandprocesses,Landscapemodeling,GISandRemotesensing).BLandscapechangeanddrivingforces(Monitoringoflandscapechanges,Humanactivityandlanduse,Cultureandlandscape).CLandscapemanagementandreconstruction(Ecologicalrestorationofnaturalareas,Landscapeplanninginruralareas,Ecologicalriskandsecurityassessmentforcatchments,Ecologicalengineeringinagriculturallandscapes).DEnvironmentprotectionandecologicaldevelopmentinwesternChina(Managementofoasislandscape,desertlandscapeanddesertificationcontrol,Biodiversityconservation,landscapeResourcesandtourism).EUrbanlandscapeecologyPreliminaryconferenceprogram:September22,arrivalinLanzhou,Registration.September23,plenarysessions;September24,in-conferenceexcursion(Lanzhoucity)September25,parallelsessionsWorkinglanguage:EnglishPostconferenceexcursions:September26-29,2001No.1SilkRoadandAridRegionLandscape:Desert,Oasis,andDunhuang.No.2Qinghai-Xizang(Tibet)Plateau,Meadow,SaltLakeandQinghaiLake,CoolDesertNo.3WorldNaturalHeritege:Jiuzhaigou,SichuanProvince(ForestandWaterfall)Callforpapers:Participantsintendingtopresentapaperoraposterduringtheconferencearerequestedtosendanabstract(nolongerthan500words)asemailorTXTformatattachmenttotheconferencesecretary(Landscape2001@sina.com).Or,youcansendthehardcopyto:Dr.CAOYu,InstituteofAppliedEcology,CAS,P.O.Box417,S

简介：Exclosureisamethodofrehabilitatingdegradedlandsbyprotectingthemfromtheinterferenceofanimalsandfromhumanencroachment,andisusedtoregeneratenativevegetationasawaytoreducesoilerosion,increaserainwaterinfiltrationandprovidefodderandwoodybiomassindegradedgrazinglands.Therefore,westudiedwoodyplantstructure,diversityandregenerationpotentialsin5-and10-yeargrazingexclosuresincomparisonwithopengrazedsitesinasemi-aridenvironment.Dataonspeciesdiversity,abundance,structure,basalarea,frequency,density,andregenerationstatuswerecollectedfrom270sampleplots.Forty-onewoodyspeciesrepresenting20familieswereidentified,with18,28and38speciesfoundinopengrazedareas,andin5-and10-yeargrazingexclosures,respectively.The10-yeargrazingexclosureshadahigher(P<0.05)speciesrichnessandplantdensitiescomparedtothe5-yeargrazingexclosuresandtheopengrazedareas.ThepopulationstructureandregenerationstatusofwoodyspeciesinbothgrazingexclosuresshowedaninvertedJ-shape,indicatingahealthyregenerationstatus,whereashamperedregenerationwasobservedinopengrazedareas.Theestablishmentofgrazingexclosureshadpositiveeffectsinrestoringwoodyplantdiversityandimprovingvegetationstructureandregenerationpotentialsofdegradedgrazinglands.

简介：Sino-U.S.relationmodeinAsia-Pacificregionisthecombinedresultof"generaltrend"intheAsia-PacificandSino-U.S.intellectualscheme.Ifbothsidescanberationalintermsofthegeneralsituation,beinnovative,shoulderresponsibilitycourageously,thereisgreatlikelihoodtheywillbothprosperbasedon"mutualco-evolution".

简介：TheYellowstonevolcanoisoneofthelargestactivevolcanoesintheworld,anditspotentialhazardsdemanddetailedseismologicalandgeodeticstudies.Previousstudieswithtraveltimetomographyandreceiverfunctionshaverevealedalow-velocitylayerinthecrustbeneaththeYellowstonevolcano,suggestingthepresenceofamagmachamberatdepth.Weuseambientseismicnoisefromregionalseismicstationstoretrieveshort-periodsurfacewavesandthenstudytheshallowshearvelocitystructureoftheYellowstoneregionbysurfacewavedispersionanalysis.WefirstobtainedacrustalmodeloftheareaoutsideoftheYellowstonevolcanoandthenconstructedanabsoluteshearwavevelocitystructureincombinationwithreceiverfunctionresultsforthecrustbeneaththeYellowstonevolcano.Thevelocitymodelshowsalow-velocitylayerwithshearvelocityataround1.3km/s,suggestingthatalarge-scalemagmachamberexistsatshallowlevelswithinthecrustoftheYellowstonevolcanicregion.

简介：用大气的研究(NCEP/NCAR)和在冬季期间聚集的客观地分析的由空至海的热流动(OAFlux)的环境研究/公民中心的国家中心的每月的分析数据，单个向量分解(SVD)分析被进行揭示在在北方太平洋上在500hPa(Z500)加热异例和geopotential高度的自台湾东面的菲律宾海流向日本的暖流水兵之间的联合模式。第一个SVD模式证明当加热异例的北自台湾东面的菲律宾海流向日本的暖流水兵是积极的时，在北方太平洋的中央、西方的节的Z500是反常地低的。由填写气象学的领域异例在积极(或否定)年，这被揭示了当时阿留申群岛之土人低加深(或shallows)，在西北弯屈自台湾东面的菲律宾海流向日本的暖流加强的overlying(或变弱)并且导致近表面的空气凉爽(或温暖)。而且，这增加(或减少)向上的热流动异例并且冷却(或温暖)海表面温度(SST)因此。在自台湾东面的菲律宾海流向日本的暖流和它的下游的区域的附近，沿着纬度的空气温度的垂直结构是baroclinic；然而，geopotential高度是相等地barotropic，哪个礼品凉爽的马槽(或温暖的山脉)空间结构。分叉的风和垂直速度被介绍显示出异常带的发行量房间。这些被升起描绘(或下降)在中央诺思太平洋的空气，它向西流动并且向上面的对流层东方，下降(或上升)在自台湾东面的菲律宾海流向日本的暖流并且在北美洲的西方的节，然后加强(或变弱)中间纬度的带的房间(MZC)。

简介：Themulti-photonionizationspectrumofNOinthewavelengthregionof575-680nmisobtainedwithanopticalparametergeneratorandamplifier(OPG/OPA)pumpedbyapicosecondNd:YAGlaserasradiationsource.ThebandedstructureofthespectrumindicatesthatNOmoleculeisionizedinresonantmannerandthepeaksofthespectrumareassignedtothetransitionofNOmoleculefromthegroundelectronicstatetoA2∑(v'=0,1,2,3),E2∑(v'=0,1,2),F2Δ(v'=0,1,2,3)andH2∑(v'=0,1,2)intermediateresonantones.ThemoleculeconstantsaboutNO(A2∑,E2∑,F2Δ,H2∑)statesarecalculatedfromthecenterwavelengthofthespectrum.ItisalsofoundthatowingtothespecialelectronconfigurationofNO,thismoleculedoesnotfollowthenormaltransitionselectionruleofthediatomicmoleculeduringthemulti-photonprocess.

简介：35件表面土壤样品和28件侧面土壤样品在纵的范围峡区域被收集，西南中国。有环境的花粉和孢子和他们的关系的分发被分析。结果证明在花粉和孢子税有重要差别一，数量，主导的税在Ailao山的东方、西方的胁腹之间的andflorae。有更多的花粉和孢子税一，山的西方的胁腹上的更大的数量和复杂性比那些在东方胁腹上，当时主导的税一在Ailao山的东方胁腹上更集中、突出。至于植物florae分发，在税的数字有重要差别一篇and作文在之间东方并且西方的胁腹。侧面花粉和它变化的趋势是的孢子集合表演的分析基本上根据表面花粉和孢子，它也是山的二胁腹之间的环境差别的指示物。花粉和孢子的这些重要空间差别离地区性的地形学和气候差别很靠近。对潮湿沉重的空气流动变垂直的山在不同精力潮湿特征作为一个障碍和季风发行量服务东方和山结果的西方。我们断定花粉和孢子的主要模式能被归因于环境差别。

简介：Theprotectionofdrinkingwatersourcesisvitaltourbandevelopmentandpublichealth.Inthisstudy,thecurrentsituationofthemandatoryprotectionareafordrinkingwatersourceinthePearlRiverDeltaregionwasinvestigatedusingamethodcombiningGoogleEarthwiththefieldsurvey.Thegapsbetweenmanagementpracticesandlegislationrequirementswereanalyzed.Finally,severalcountermeasuresforwaterresourceprotectionwereproposedasfollows:topromotedelineationinamorescientificway,tosafeguardthesanctityofthelaw,tomakebetterplanonwatersaving,andtoencouragepublicparticipationinsupervisionandmanagement.

简介：ＥＸＰＥＲＩＭＥＮＴＡＬＳＴＵＤＩＥＳＷＩＴＨＡＮＯＰＥＲＡＴＩＯＮＡＬＮＵＭＥＲＩＣＡＬＭＯＤＥＬＦＯＲＰＲＥＤＩＣＴＩＯＮＯＦＴＹＰＨＯＯＮＴＲＡＣＫＳＯＶＥＲＴＨＥＳＯＵＴＨＣＨＩＮＡＳＥＡＲＥＧＩＯＮ￥ＷａｎｇＫａｎｇｌｉｎｇ，ＨｅＡｎｇｕｏ...

简介：HoloceneMegathermal被划分成早、中间、迟了的时期，各由于他们改变趋势的不同气候在过时的文化上有不同影响。这研究基于在金海·莱克，记录的环境进化信息的比较分析黄土高原和Zoige和Gansu-Qinghai区域的过时的地点的空间分发的西方的边。结果证明早、中间的时期向温暖、潮湿在Gansu-Qinghai区域作为主要扇区与农业支持了过时的文化的开发，而且，Yangshao文化繁荣的一个全盛时期出现了。Holocene在Gansu-Qinghai区域在5.9kaBP在冷气候事件以后进入了迟了的时期。后来，气候开始变得冷。然而，在5.84.2kaBP，相对稳定的温暖、潮湿的气候在这个区域为过时的年龄的Majiayao文化的发展创造了条件，因此，它的文化遗产地点的分发向高高度和高纬度膨胀了。从4.2kaBP向前，气候变得冷、干燥，它在Gansu-Qinghai区域的过时的文化上有重要影响，在4.2kaBP附近在文化人物和Qijia文化的空间分发导致一个戏剧的变化。在以后一将近300年冷、干燥的时期，统一过时的耕作文化完全崩溃了。以后，畜牧和耕作和地区性的多重文化的一个工业部门形成了，并且最终导致了原始社会并且开始一个使文明的社会的结束。

简介：TheEuropeanUnion(EU)isoneofthemainenergyconsumersandimportersintheworld.SafeguardingenergysecurityhasbecomethepriorityobjectiveininternalandexternalpoliciesoftheEU.Byimplementingitsdiversificationstrategyinenergysupply,theEUhasstrengtheneditsrivalryforenergyinCentralAsia.ChinaandtheEUfacesimilarenergysecurityproblem.AfterthelaunchingofthenaturalgaspipelinesinCentralAsia,thesourcesofgassupplyforChinaandtheEUbecomeintertwinedintheregion,makingtheircontentionfiercerthanever.ProperlyhandlingtheenergycompetitionandcooperationwiththeEUintheregionhasbecomeanimportantconcerninChina'senergysecuritystrategy.

简介：AccordingtotheChineseGovernmentWebsite,allthedistrictsandcountiesunderthejurisdictionofGuyuanCitylocatedinLiupanshanMountainofSouthernNingxia