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245 个结果
  • 简介:纸试图扩大坡度的地区性的observability的观点到semilinear夸张大小写,以便重建在领域进化的一个分区的起始的条件的坡度。我们以一个asymptotically线性的系统开始,途径基于Hilbert唯一方法(嗡嗡声)和Schauders的延期固定的点定理。分析导致数字地成功地与例子和模拟被实现并且说明的一个算法。

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  • 简介:在干旱区域基于“一河一绿洲”的特征,theYerqiang硫,是Xinjiang的最大的灌溉区域,在这篇论文作为一个例子被拿,并且地区性的水发行量模式在盆通过同位素数据的60groups的分析被调查。从不同土壤的井的蒸发数据分析,我们学习井的蒸发的法律,完成地下水的主要消费路径的研究,并且改进水资源的评价精确。地区性的水资源的转变山被计算预言,它在干燥区为水资源评价和分配提供一个科学基础,并且为地区性的水发行量模式的学习提供一个新方法。

  • 标签: 新疆 叶尔羌河盆地 水循环类型 水资源 地下水 地表水
  • 简介:Withtheimplementationofreformandopening-up,theoveralleconomyofChinahasmadebrilliantachievements;meanwhile,however,theeconomicdisparityhasbeenenlargingamongsomeregions,andbetweenthecityandthecountryside.Theexistenceandevolutionofthiskindofeconomicdisparityisconcernedwithsocialstability,sustainabledevelopmentandtheconstructionofharmonioussociety,whichhasgraduallybecomethehotspotinsocialeconomicdevelopment.TheWestCoastoftheStrait(WCS)locatedinsoutheastlittoralareasisadjacenttothePearlandYangtzeRiverDeltainthesouthandnorthandfacesTaiwanProvinceintheeast.Thestabilityanddevelopmentofthisregionhasvitalpoliticalandeconomicmeaninginthesocialeco-nomicdevelopmentofourcountry.Ithasimportanttheoreticalmeaningandpracticalvaluetoresearchtheform,characteristicsandevolutionofregionaleconomicdisparityintheWCS.BasedoninsightfulanalysisonexistingstudyresultsontheWCS,thepaperdefinestheconnotationandextension.Byaseriesofabso-luteandcomparativerelativeevaluationindexesandtakingtheWCSsince1992asthestudyobject,thepapermakesanalysisondifferentscalesincludingthreeregions,fourregions,20citiesand152counties,quantitativelyevaluatesthelevel,characteristicsandevolutionoftheregionaleconomicdisparityandcomparestheregionaleconomicdisparityondifferentscales.Themainconclu-sionsareasfollows:thevariationtrendoftheabsolutedisparityofthewholeregionisobviousandstable,whichhaspresentedaninflatingtrend;thecomparativevariationtrendonalargescalehaswaved,Thecomparativedisparityofthethreeregionsin-creasedannuallyfrom1992toaround2000,whichhadadecreas-ingtrendfromaround2000to2005;thecomparativevariationtrendonasmallscalewasnotstable,whichshowedanannualincreaseoffourregions,20citiesand152countiesfrom1992toaround2003andadecreasefromaround2003to2005;ther

  • 标签: 绝对差距 区域经济 和谐社会 中国 台湾海峡西海岸 不平衡发展
  • 简介:Inthispaper,experimentresultsaboutEastAsiaclimatefromfiveCGCMsaredescribed.Theabilityofthemodelstosimulatepresentclimateandthesimulatedresponsetoincreasedcarbondioxidearebothcovered.Theresultsindicatethatallmodelsshowsubstantialchangesinclimatewhencarbondioxideconcentrationsaredoubled.Inparticular,thestrongsurfacewarmingathighlatitudesinwinterandthesignificantincreaseofsummerprecipitationinthemonsoonareaareproducedbyallmodels.RegionalevaluationresultsshowthatthesefiveCGCMsareparticularlygoodinsimulatingspatialdistributionofpresentclimate.ThemaincharacteristicsoftheseasonalmeanH500,SAT,MSLPfieldcanbesimulatedbymostCGCMs.ButtherearesignificantsystematicerrorsinSAT,MSLP,HS00fieldsinmostmodels.Onthewhole,DKRZOPYCisthebestinsimulatingthepresentclimateinEastAsia.

  • 标签: EVALUATION coupled ATMOSPHERE and OCEAN general
  • 简介:Thepoleassignmentinaspecifieddiskbystatefeedbackforuncertaindelta-operatorsystemsisstudied.BymakinguseofalgebraRiccatiequations,asufficientandnecessaryconditionofpoleassignmentforakindofparameteruncertaindelta-operatorsysteminaspecifieddiskbystatefeedbackispresented.Andthedesignmethodofstatefeedbackcontrollerisalsodeveloped.Theproposedmethodcanunifysomepreviousrelatedresultsofcontinuousanddiscretetimesystemsintothedeltaframework.Theefficiencyofthedesignmethodisillustratedbyanumericalexample.

  • 标签: 三角算子 区域分配 不定性 稳健性 状态反馈
  • 简介:陆地表面变化由于陆地空气相互作用联合的建筑群完成地区性的气候。从1995~2000,在植被密度的减少和地面级的热力学的活动的增加被多重数据源在西北中国记录了,包括气象学,从中等范围的天气预报(ECMWF)的欧洲中心的重新分析,国家海洋、大气的管理“s(NOAA)预付很高的分辨率辐射计(AVHRR)和初学者运作垂直更健全(TOVS)卫星遥感数据。作为地面级的热力学的活动增加,区域向沙漠集成的从包围的潮湿的空气(并且半沙漠)区域,引起有高植被盖子的区域更逐渐地变得干旱。而且,土地出现在西北中国的变化为在全部的云量的减少负责,在low和中云的部分的衰落,高云量的增加(由于热力学的活动)并且另外的地区性的气候的改编。这被建议,在1995开始,这些云量变化贡献了一个“温室”效果,导致快速的气温增加和在西北中国上被观察了的另外的地区性的气候影响。

  • 标签: 华北地区 地方气候 地表特征 TOVS NOAA-AVHRR
  • 简介:第五产生的宾夕法尼亚州的University/NCARMesoscaleModelVersion3(MM5V3)被用来在1999年6月在长江盆上模仿极端重降雨事件。模型极端气候事件上的水平、垂直的决定的效果详细被调查。原则上,模型能描绘每月重的降水的空间分发。结果显示水平分辨率的增加能减少建模的大雨的偏爱并且相当在学习时期期间模仿每日的降水的变化。导致的一个更好的垂直决定显然与更小的偏爱改进降雨模拟,并且因此,更好解决重降雨事件。在水平、垂直的分辨率的Theincrease能生产重降雨事件的更好的预言。在不同水平、垂直的格子间距的情况中改变的不仅降雨模拟,而且另外的气象学的领域在模型以决定变化表明了多样的变化。在模仿的海平面气压的明显的改进源于水平分辨率的增加,但是模拟对垂直格子间距感觉迟钝。垂直分辨率的增加能在底层提高地面温度以及大气循环的模拟,当在中间、上面的层次的循环的模拟在改变分辨率上被发现是少得多依赖时。另外,积云parameterization计划显示出高敏感到水平分辨率。Differentconvective计划关于改变分辨率在降雨模拟展出了大差异。在Grell计划的对流降水的百分比与增加水平分辨率增加了。相反,Kain-Pritsch计划引起了对流降水的减少的比率总计相应于增加水平分辨率的降雨累积。

  • 标签: 区域气候 分辨能力 对流 降雨
  • 简介:TheSCOhasbeencloselyfollowingdevelopmentsinAfghanistanandhasattachedgreatimportancetotheaffectofthecivilwarinthecountryontheregion.WaranddrugsinAfghanistanaredirectlylinkedtothespreadofthe"threeforces"inCentralAsiaandtocross-bordercrime.TheSCO'spositionontheAfghanissueisasfollows:ItrespectsthewilloftheAfghanpeopletosetupagovernmentthataccordswiththepeople'sowninterests;itsupportstheAfghangovernmentinrealizingeconomicdevelopmentwiththehelpoftheinternationalcommunityandpreservingpeaceandstabilityinthecountry;itstressestheimportanceofmaintainingtheleadingroleoftheUnitedNationsincoordinatinginternationalassistancetoAfghanistan;anditexpressesitscommitmenttoenhancecooperationwiththeAfghangovernmentoncombatingterrorism,illicitdrugstraffickingandorganizedcrime.

  • 标签: 合作组织 阿富汗 区域合作 上海
  • 简介:Globalclimatechangehasbeenidentifiedasthefirstofthetoptenenvironmentalproblemsintheworld.Asclimatechangewillhaveseriouseffectsonthesocialandeconomicdevelopmentandeverydaylivingofpeopleintheworld,manyofthecountriesandgovernmentsaretakinguntiringeffortstocombatclimatechange.Asoneoftheimportantmechanismsofreducinggreenhousegas(GHG)emissionsintheKyotoProtocol,CleanDevelopmentMechanism(CDM)hasnotonlyprovidedchancefordevelopedcountriestofulfillgreenhouseemissionreductionobligations,butalsoprovidedanopportunityfordevelopingcountriestocombatclimatechangeunderthesustainabledevelopmentframe.Thedualobjectivesofdevelopedcountries'GHGemissions'reductionobligationachievementanddevelopingcountries'sustainabledevelopmentwillbeachievedundertheCDM.Asacountrywithresponsibility,ChinahasbeenpositivelydevelopingCDMprojectsandpromotingenergysavingandemissionsreductionduringthethreeyearsaftertheKyotoProtocolcameintoforce,andCDMprojectsdevelopmenthasalwaysbeeninthefronttankintheworld.However,asthevastclimewithinChina,notabledifferencesoccurindifferentregions.InordertopromotetheCDMdevelopmentinChina,itisnecessarytohaveregionalCDMcapabilityconstructioninaccordancewiththepracticalityindifferentregions.BasedontheSlatAnalysisofdevelopedCDMprojectsandcurrentCDMdevelopmentstatusinChina,problemsintheCDMdevelopmentofChina,includingtheinefficiencyinsmallandmedium-sizedCDMProjectsdevelopment,overcentralizationofCDMdevelopmentscopeandespeciallythedifferentiatedprovincialCDMprojectsdevelopingcapabilityarepointedoutinthepaper.What'smore,reasonsfortheproblemsareanalyzedfromtheleadingfactors,includingpolicyorient,informationasymmetryandweakCDMcapability.InordertopromoteCDMprojectsdevelopmentinChina,anewCDMcapabilityconstructionmodelisputforwardinthepaper

  • 标签: 清洁发展机制 能力建设 温室气体排放量 全球气候变化 发展中国家 京都议定书
  • 简介:StudyofthemajorAsianriversdischargetotheoceanrevealsvariationsoftheirwaterdischargesandsedimentloads,andlocalcharacteristicsofriversedimentconcentrations.Onthebasisofthis,theAsianriversfallintothreeregions,includingEurasiaArctic,EastAsia,SoutheastandSouthAsiaRegions.TheEurasiaArcticRegionischaracterizedbythelowestsedimentconcentrationandload,whiletheEastAsiaRegionisofthehighestsedimentconcentrationandhighersedimentload,andtheSouth-EastandSouthAsiaRegionyieldshighersedimentconcentrationandhighestsedimentload.Thesedimentloadsoftheseregionsaremainlycontrolledbyclimate,geomorphologyandtectonicactivity.TheEurasiaArcticriverswithlargebasinareasandwaterdischarge,drainlowreliefwhichconsistsoftundrasediment,thuscausingthelowestsedimentload.TheEastAsiariverswithsmallbasinareasandlowestwaterdischarges,drainextensiveloessplateau,andtransportmosterodibleloessmaterial,whichresultsinhighestsedimentconcentration.TheSEandSouthAsiariversoriginatingfromtheTibetPlateauhavelargebasinareasandthelargestwaterdischargesbecauseoftheSummerMonsoonandhighrainfallinfluence,causingthehighestsedimentload.InAsia,tectonicmotionoftheTibetPlateauplaysanimportantrole.ThoselargeriversoriginatingfromtheTibetPlateautransportabout50%oftheworldriversedimentloadtooceanannually,forminglargeestuariesanddeltas,andconsequentlyexertingagreatinfluenceonsedimentationinthecoastalzoneandshelves.

  • 标签: 亚洲 入海河流 悬移质 输沙量 区域性变化
  • 简介:Theinternationalfinancialcrisisbeginningin2007notonlyraisesquestionsonbutalsoposeschallengestotheWesterneconomicmodel.Incontrast,emergingeconomies’positionintheworldeconomyisimprovingconstantly,thecenterofworldeconomybeginstoshifttoAsia-PacificRegionatanacceleratedrate,andChinaasarisingemergingeconomic

  • 标签: 区域经济合作 世界经济 金融危机 经济模型