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  • 简介:IntegratedwithGISandremotesensing(RS)technology,asystematicanalysisanditsmethodologyforhuman-settlementssocialenvironmenthasbeenintroduced.Thismethodologyhasbeencalledspatialtrendfieldmodel(STFM).STFM'sapplicationhistoryinthefieldofhuman-settlementssocialenvironmenthasbeendiscussedatfirst.Then,someindexdatamodelshavebeencreatedthroughSTFM,whichincludepopulationdensitytrendfield,humanactivitystrengthtrendfield,city-townspatialdensitytrendfield,urbanizationratiotrendfield,roaddensitytrendfield,GDPspatialdensitytrendfieldandPER-GDPspatialdensitytrendfield.Withallabove-mentionedindexesasinputdata,throughIterativeSelf-OrganizingDataAnalysisTechniquesAlgorithm(ISODATA),thispapermakesaverificationstudyofChongqingmunicipality.TheresultofthecasestudyconfirmsthatSTFMmethodologyiscredibleandhashighefficiencyforregionalhuman-settlementsstudy.

  • 标签: 人类住区 空间密度 社会网络 重庆市 面模型 分析基
  • 简介:在循证医学中RCT被认为是临床治疗、干预措施效果评价的最佳证据来源,原因是源于其设计原理。研究单位被随机化地分配到不同的干预组,经过一段时间的干预后,与对照组相比,根据不同干预组间结局的不同,推断干预效果与干预措施的因果关系。

  • 标签: 报告规范 试验研究 随机对照 干预措施 解读 清单
  • 简介:Inthisstudy,weexaminealong-termincreasingtrendinsubtropicalpotentialvorticity(PV)intrusioneventsoverthePacificOceaninrelationtotheglobalmeantemperaturerise,basedonmultiplereanalysisdatasets.ThefrequencyofthePVintrusionsiscloselyrelatedtotheupper-troposphericequatorialwesterlyductandthesubtropicaljet(STJ).AnoverallstrengtheningofthewesterlyductandweakeningoftheSTJarefoundtobedrivenbythewarming-inducedstrengtheningofWalkercirculationandregionalchangesinHadleycirculationonmulti-decadaltimescale,leadingtoanincreaseinthePVintrusionfrequencyoverthetropics.Theresultsarerobustinalldatasets.Themulti-decadalstrengtheninginthePacificWalkercirculationisconsistentwiththeglobalmeantemperaturerise.Inthisway,thePVintrusionsarecorrelatedwiththewarmingrelatedglobalmeantemperuaterise.WhentheinterannualvariabilityofENSOisremovedfromtheintrusiontimeseries,thelong-termtrendinPVintrusionsduetoexternalforcingassociatedwithanthropogenicwarming(globalmeantemperaturerise)becomesclearer.Thelinkbetweentheglobalmeantemperatureriseandintrusionfrequencyisfurtherverifiedbyperformingacorrelationanalysisbetweenthetwo.Thesignificant(>95%)correlationcoefficientis0.85,0.94,0.84,0.83,and0.84forERA-40,ERA-Interim,NCEP-NCAR,JRA-55,andJRA-25,respectively.Thisunequivocallyindicatesthattheglobalmeantemperaturerisecanexplainaround69%–88%ofthevariancerelatedtothelong-termincreaseinPVintrusionfrequencyoverthePacificOcean.

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  • 简介:基于三个全球年度吝啬的表面温度时间系列和三个中国年度平均数表面空气温度时间系列,多重timescales上的气候变化趋势被使用多滑动的时间窗户的趋势评价方法分析。结果被用来在1998-2012期间讨论所谓的全球温暖的中断。不同开始和结束时间在趋势评价的结果上有明显的效果,这被表明,并且当使用一扇短窗户时,含意特别地大。全球温暖的中断在1998-2012期间是在短timescales上看温度系列的结果;并且类似于它的事件,或有甚至冷的趋势的事件,实际上历史上多次发生了。因此,全球温暖的中断是可能的是长期的温度变化的一个期刊特征。它主要在短学期反映温度,和如此的现象的十的可变性不从长远的观点看改变全面温暖趋势。

  • 标签: 滑动时间窗 全球变暖 平均温度 中断 时间序列 估计方法
  • 简介:AsocialistlegalsystemwithdistinctChinesefeatureshastakenshapein2010asrequiredbythegeneralobjectiveofthe"ruleoflaw"strategyandlegislationworkputforwardbytheParty’s15thnationalcongress.Uptothepresent,Chinahasalreadymade237laws,includingtheConstitution,699administrativedecreesandregulationsandmorethan8,600locallawsandregulations.1Theycoversevenlegalregimes,threetiersoflaws.Lawsconcerninghumanrightsareanimportantcomponent

  • 标签: 法律体系 中国特色 立法工作 主义 社会 导向
  • 简介:AnapproachisproposedforpredictingturningandaccelerationmotiontrendofthetropicalcyclonesovertheSouthChinaSeafor72hintheextrapolatedtrackcoordinates.Cross-track(CT)andalong-track(AT)componentsaredefinedaccordingtothepersistentlyextrapolatedtrackcoodinatesbasedonobservedpositionsattheinitialandpast24htimes.Akindofstraight-forwardmeasuremaybeprovidedwithCTandATcomponentsfortyphoonturningmotionandac-celerationmotion.Canonicalcorrelationanalysis(CCA)isperformedtorevealthecorrelaotionsbe-tweentropicalcyclonetracksandenvironmental500hPageopotentialheightfields.Astepwisedis-criminateanalysistechniqueisadoptedtoderivetheclassificationfunctionsoftherespectivethreecategoriesforATandCTcomponents.Especially,categoricalcombinationsofCTandATcompo-nentsaredividedintopossible9regionscorrespondingwithtropicalcyclonebehaviors.Notonlycan9motiontrendsofatropicalcyclonebepredicted,butalsothelocationanditsmaximumerroratleastincertaindirectionareavailable.Theperfectprediction(PP)verificationsindicatethatthepercentcorrectsfortheCTandATcategoriesare67%and69%intheindependentsamples,73%and53%inthedependentsamples,respectively,higherthanthatof33.3%forrandomchance;moreover,therateforsuccessfullyforecastingthatinwhichoneofthenineregionsthetropicalcy-cloneswillfallat72hisabout40%,alsohigherthanthestochasticprobabilityof11%.Themethodhasbeenprovedtobeskillfulandpromising.

  • 标签: extrapolated TRACK coordinate cross-track(AT)and along-track(CT)components CANONICAL
  • 简介:<正>The10thNortheastAsiaYouthForum,withthethemeofChina-ROK-JapanYouthEmploymentGuidance,sponsoredbyMoralRe-Armament/InitiativesofChange(MRA/IC)-KoreawasheldinSeoulandCheonanfromAugust12to17.Seventyfivecollegestudentsfrom37universitiessentbyChinaInternationalYouthExchangeCenter,MoralRe-Armament/InitiativesofChange(MRA/IC)-KoreaandJapanSocietyattendedtheForum.LeeBoksil,Vice-MinisterofMinistryofGender

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  • 简介:Researchingthedynamicdistributioncharacteristicsandtrendevolutionofagriculturalcarbonemissionsisofconsiderablesignificanceinformulatinganeffectiveagriculturalcarbonreductionpolicy.Basedonmeasurementofagriculturalcarbonemissionsof31provincesovertheperiod2002-2011,thestudyobservedregionaldifferencesandthedynamicevolutionofdistributionofagriculturalcarbonemissionsusingagriculturalcarbonintensityastheindicator,accompaniedbyGinicoefficientsandthekerneldensityestimationmethod.TheresultsdemonstratefirstthatagriculturalcarbonemissionsforChinashowanobviousnonequilibriumnatureinregardtospatialdistribution.Accordingtothedifferencesinagriculturalcarbonemissionsdynamictrends,wedividedthe31regionsintofourtypes-continuousdecline,fluctuatingdecline,continuousincrease,andfluctuatingincrease.Further,agriculturalcarbonemissionsintensityshowedadownwardtrendwithsignificantdifferencesintheresearchareas.Second,thegapinspatialdistributionofnationalagriculturalcarbonemissionsisgraduallyexpandingbasedontheresultscalculatedbyGinicoefficient.Fromtheperceptionofregionaldifferencesinagriculturalcarbonemissions,theeasternregionshowedanaveragelevel,thegapwasmoreobviousinthecentralregion,whilewesternregionshowedatrendoffluctuatingdownward.Third,accordingtoestimationbykerneldensity,theregionaldisparityinagriculturalcarbonemissionshadadownward,butlimited,trend.Inregardtoagriculturalcarbonemissionsoverthethreeareas,theregionalgapnotonlytendedtodecreasebutalsoshoweda"fourway"differentiationphenomenonintheeasternregion.Thedifferenceinthecentralregiondifferencewasnarrower.Onthewhole,thegapforthewesternregionreducedsteadilyoverasmallrange.

  • 标签: China agricultural carbon emissions distributional DYNAMIC
  • 简介:摘要:产出导向法(POA)引入高职英语教学能够改变学生被动接受知识的弊端,提升学生在教学活动中的参与度,彰显学生在学习活动中的主体地位,强化对学生核心素养的培养。高职英语教师需要在教学实践中不断探索和尝试,在不断的完善中推动高职大学英语课程思政的教学改革。

  • 标签: 产出导向法 高职英语 教学改革
  • 简介:摘要:GPS测量技术的出现,起初仅用于军事方面,随着科学技术的不断发展,GPS测量技术在各行各业得到广泛应用。GPS测量技术因其测量精度高、易操作、受作业环境影响小等优点在工程施工中广泛应用。基于此,以下对GPS测量技术在路桥工程测量中的应用与发展趋势进行了探讨,以供参考。

  • 标签: GPS测量技术 路桥工程测量 应用与发展趋势