简介：<正>OtosclerosiswasfirstdiscoveredbyValsalvain1704[1],andthetermwasfirstusedbyAntonvonTroltschin1872todifferentiatefromtympanosclerosis[2].Normallytheoticcystinhumanremainsstationaryafterfulldevelopmentandcontainsnovisibleactivatedosteoblastsor

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简介：Migrationprocesshasbecomeincreasinglyimportantinrecentresearchonpopulationandtheenvironment.Amajorityoftheexistingmigrationandenvironmentliteraturehasfocusedontheenvironmentalcausesanddeterminantsofmigration.Withthelargestrural-to-urbanmigrationflowinworldhistory,andgrowingconcernsabouttheenvironmentalproblemsaccompanyingitsfasteconomicdevelopment,Chinaprovidesaparticularlyimportantcaseformigrationandenvironmentresearch.Thispaperreviewsmajormigrationtheoriesandrecentresearchonenvironmentaleffectsonmigration,withspecificattentiontotheinfluencesofenvironmentalfactorsonrural-to-urbanlabormigrationinChina.Acomprehensivemultilevelconceptualframeworkisdevelopedforstudyingtheenvironmentalcausesofrural-to-urbanmigrationinChina.TheeffectsoflandresourcesonhouseholdlabormigrationdecisionsinruralChinaareexploredtoillustratetheapplicationofthisframework.

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简介：I'mverypleasedtobehereatthissidemeeting,China'sGreenTransformation:Efforts,PracticesandFuture,co-sponsoredbyACCA21andUNDP.SincetheUNConferenceonEnvironmentandDevelopmentin1992,peoplearoundtheworldhavemadenumerous

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简介：正AttheinvitationofCAFIU,a15-memberdelegationcomposedofrepresentativesfromCivilAssociation"PolishHouse","AmicusEurope"(FriendsofEurope)FoundationofPoland,"WorldBridge"FoundationofHungary,Czech-China

简介：Climatechangewillalterthecapacityofcarbonsequestration,andtheriskassessmentofcarbonsequestrationforterrestrialecosystemswillbehelpfultothedecision-makingforclimatechangecountermeasuresandinternationalclimatenegotiations.BasedonthenetecosystemproductivityofterrestrialecosystemssimulatedbyAtmosphereVegetationIntegratedModel,eachgridoftheriskcriterionwassetbytimeseriestrendanalysis.Thentherisksofcarbonsequestrationofterrestrialecosystemswereinvestigated.Theresultsshowthat,intheIPCCSRES-B2climatescenario,climatechangewillbringrisksofcarbonsequestration,andthehigh-risklevelwilldominateterrestrialecosystems.Theriskwouldexpandwiththeincreaseofwarmingdegree.Bytheendofthelong-termofthiscentury,about60%ofthewholecountrywillfacetherisk;NorthwestChina,mountainousareasinNortheastChina,middleandlowerreachesplainofYangtzeRiverareas,SouthwestChinaandSoutheastChinatendtobeextremelyvulnerable.Risklevelsinmostregionsarelikelytogrowwiththeincreaseofwarmingdegree,andthisincreasewillmainlyoccurduringthenear-termtomid-term.NorthwestChinawillbecomeanareaofhighrisks,anddeciduousconiferousforests,temperatemixedforestsanddesertgrasslandtendtobeextremelyvulnerable.

简介：ChinaplanstolaunchitsfirstphysicalironoretradingplatforminDecemberaspartofeffortstogainmorecontroloverpricinginasectordominatedbyforeignsuppliers.

简介：ByadoptingtheAECIIndexMethodproposedbytheauthorandusingmethodofpopulationsimulation,thispaperanalyzesquantitativelythetrend,intensityandregulationoftheeconomicpressureofpopulationageinginChina,andcomparesChinawithothercountries.Itdrawsthefollowingconclusions:(1)Chinawillfacegreateconomicpressureduetopopulationageinginthefirsthalfofthiscentury.Accordingtothemediumprojection,thepressurewillincreasemostrapidlyduringtheperiodfromthemiddleof2020stotheendof2030s,andreachitspeakaround2040whentheintensityofthepressuremayquadruplethatin2010.(2)ThegreateconomicpressureofpopulationageingmayremarkablyreduceChina'sdevelopmentmomentum.(3)Toeasethepressure,weshouldrelymainlyoneconomicmeasures,supplementedbypopulationcontrolmeasures.(4)TograduallyliberalizetheprevailingbirthcontrolpolicyonthepremiseofstickingtothestatepolicyoffamilyplanningisarationalapproachtoregulatetheeconomicpressureofpopulationageinginChina.Ontheonehand,thiscaneasethepossibleeconomicpressureofageinginthefuture,andontheotherhand,itcancontrolthepressureofpopulationsizewithinanendurablelimit.

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简介：In2011,thestartyearofthe'Twelfth-FiveYearPlan'program,aseriesofpolicieswereissuedtargetingonrareearthindustry.Priceofrareearthsfluctuatedsharplyduring2011andconsumerswereconcernedaboutthesupplyofrareearth.Therewasabigchangeinrareearthindustry.Ⅰ.RareearthpoliciesacceleratedtheconsolidationofrareearthindustryChinesegovernmentattachedgreatimportancetothetheproblemsthathamperedthehealthy

简介：自从1949，在中国繁殖很快增加了的家畜的能力，和肉，家禽和鸡蛋的全部的产量坚持说世界超过第一在最近20年。家畜排出物和污染仔细与它的人口和空间分发被联系。这份报纸试图调查在中国繁殖的家畜和家禽的空间模式。用在2007的统计年鉴和农业调查，家畜和家禽的县级的人口作为相等的标准化猪索引(ESP)被估计，每栽培陆地猪索引(PCLP)和人均的猪索引(PCP)。在空间数据分析(ESDA)的帮助下在Geoda和ArcGIS软件的工具，特别Morans我和LISA统计，三指示物的全国全球、本地的聚类的趋势分别地被检验。我和LISA分析显示出的Morans那ESP和PCP显著地全球性并且局部地正在聚类。然而，PCLP局部地正在聚类然而并非重要全球性。而且，题目的地图系列(TMS)和相关严肃中心曲线(GCC)被介绍在中国探索家畜和家禽的空间模式。指示物被分类进16个层次，并且为从水平1～16的三指示物的GCC详细被讨论。为districting目的，在严肃之间的每间隔近的层次集中因为所有三指示物被计算，并且districting每指示物打字被合并邻近的层次获得。为三指示物的districting分析证明那在那里存在为瓷器家畜并且家禽繁殖的一个潜在的一致districting计划。作为结果，繁殖的瓷器家畜和家禽将被分类进八种类型：极其稀少的区域，稀少的区域，相对稀少的区域，通常稀少的区域，正常区域，相对集中的区域，集中的区域和高度集中的区域。在那里存在，这也被发现一根清楚的分界线在之间专注并且稀少的区域。从在XinBarag之间的县边界的线开始离开了旗帜和XinBarag正确旗帜，内部蒙古自治区域到Dongfang县的西方海岸，海南省。

简介：Withtheanalysisonthecharacteristicsofglobalforestcarbonmarketin2010andbasedonthecurrentstatusofChina’sforestcarbonmarket,thepaperpresentedthepathselectionforforestcarbonmarketcultivationinChina,i.e.strengtheningthepromotionandcooperationofinternationalforestcarbonsequestrationprojectstoforwardglobalforestcarbonmarketdevelopment,developingprimarymarkettransactionstosteadilypromotefinancialmarketdevelopment,promotingtheformationofdomesticforestcarbonmarket,andputtingvoluntaryemissionreductionasthepriorityofcurrentmarketdevelopment.

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简介：YangWenzhuang,male,Hannationality,borninAugust1964,MasterofPublicAdministrationfromCentralPartySchool.September1984toJuly1988:Student,NewsDepartment,Beijing

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简介：Byadoptingtheevaluationindexsystemofconservationprioritywhichincludedthreatenedcoefficient,geneticcoefficient,utilizationcoefficient,protectionstatuscoefficientandliststatuscoefficient,theendangeredplantsinNortheastChinawerequantitativelyanalyzedandsyntheticallyevaluated,andthevalueofconservationpriorityandconservationprioritygradesoftheendangeredplantsweredetermined.Theresultsshowedthattherewere60speciesofendangeredplantsbelongingto42generaand25familiesinNortheastChina,thevalueofconservationpriorityrangedfrom0.8538-0.3184.Theendangeredplantsweredividedinto3gradesaccordingtotheirvaluesofconservationpriority,17speciesbelongingto15generaand11familieswereinthefirstgradeprotection,18speciesbelongingto14generaand11familieswereinthesecondgradeprotection,25speciesbelongingto17generaand13familieswereinthethirdgradeprotection.Thequantitativelyevaluationindexsystemofconservationpriorityinthispaperrepresentedthedegreeofconservationpriorityoftheendangeredplantscomprehensively,objectivelyandaccurately.