简介：

简介：Stochasticfrontierproductionfunctionapproachisadopted,93farmersampleshavebeencollected,pureefficiency,technicalefficiency,technicalchangeandscaleefficiencyandtheinstitutionalcontributionhavebeencalculated.Theresultsindicatedthatincreasingproductivityisthesolemeasurementtoreducepoverty,institutionandtechnicalchangearethetwokeyfactors.Therefore,stableinstitution,improvingtechnicalchangesarerequired.Atpresent,itisurgenttomaketechnicalprogre...

简介：2016年6月12日晚,发生在美国奥兰多市的一件枪击案震惊了全球.这件导致上百人伤亡的事件让人寒心.在人们伸张正义、呼吁控枪之际,一首名为'Change'的歌犹如严冬的炉火温暖了人们受伤的心.值得一提的是,这首歌的演唱者、美国知名歌手ChristinaAguilera决定将歌曲的全部收益都捐赠给此次枪击案的遇难者家庭,她的这一举动让人倍感温馨.

简介：

简介：Livercelltransplantationpresentsclinicalbenefitinpatientswithinbornerrorsofmetabolismasanalternative,oratleastasabridge,toorthotopiclivertransplantation.Thesuccessofsuchatherapeuticapproachremainslimitedbythequalityofthetransplantedcells.Cryopreservationremainsthebestoptionforlong-termstorageofhepatocytes,providingapermanentandsufficientcellsupply.However,isolatedadulthepatocytesarepoorlyresistanttosuchaprocess,withasignificantalterationboth...

简介：

简介：Theconsequencesofglobalclimatechangepresentaseriousstrategicchallengeinoneofthemostremotepartsoftheworld.TheTibetanPlateauisthelargesthigh-altitudelandmassonearth,withmorethan45,000glaciersthatfeedthemajorriversystemsinAsia,which,inturn,support40percentoftheworld’spopulation.Temperaturesintheregionarerisingtwiceasfastastheglobalaverage,posingseriousriskstohydrologicalsystems,agriculture,andcriticalinfrastructure.Lookingatregionalcooperationthroughthelensofecologicalsecurityraisesimportantquestionsabouttheextenttowhichthethreatoflarge-scaleclimate-relateddisastercouldtriggernewformsofcooperativeaction.Thesoberingrealityisthatcurrentresponsesfallfarshortofensuringamutuallysecurefuture.

简介：Someconsequencesofglobalwarmingareunambiguously1)bad.Risingsealevelscan’tdoanybodyanygood.Norcanhighertemperaturesinhotterbitsoftheworld.ButthewarmingoftheArcticisnotquitesoclear-cut.Mostpeoplefearit,butsomemayseereasontowelcomeit.2)

简介：EngineeringChange(EC)managementforaProductLifecycleManagement(PLM)system,includingECdatamodel,ECevaluationandECimplementationispresented.AmethodofdynamicandparallelECevaluationisproposed,whichbreaksanECevaluationtaskintoseveralsubtasks.Suchsubtaskscanbedynamicallyandsimultaneouslyproceeded,disassembledandcommunicatedbydifferentspecialists,andatthesametimeasetofECobjectsiscreated.ThisapproachprovidesflexibleandeffectiveevaluationoftheEC.TheECimplementationfollowedwillfurtherensurethecompletenessandconsistencyofECdata.

简介：The21stConferenceofthePartiestotheUnitedNationsFrameworkConventiononClimateChangeandthe11thConferenceofthePartiestotheKyotoProtocol（theParisConferenceonClimateChange）openedinParisonNov.30,2015.AsamemberoftheChinaNGONetworkforInternationalExchanges（CNIE）delegation,Iattendedthefirst-weekactivitiesfromNov.30toDec.4.

简介：

简介：

简介：批评话语分析(简称CDA)以社会问题尤其是诸如性别、种族、阶级、年龄歧视等种种不平等的现象为针砭的对象,通过解剖大量而具体的真实语料,以客观的语言证据和详尽的分析,把社会冲突归因于权力,把批评的矛头指向政府或者其他权力机构和个人,向人们揭示话语、符号与权力之间的关系,达到对现有社会制度和意识形态进行解构的目的,Martin称之为CDArealis(已然的批评话语分析);而与之构成互补关系的另一方面则是Martin主张的CDAirrealis(未然的批评话语分析)。他认为话语分析应该采取积极友好的态度。这个积极友好,不仅适用于自己和自己一方的人,而且适用于自己的对立一方,其目标在于通过这样的分析,朝着"和平语言学"(peacelinguistics)的远大目标努力,最终建成一个宽松、和解、共处的人类社会,这就是,积极话语分析(简称PDA)。

简介：

简介：

简介：

简介：Climatesecurity,whichbearsonthedevelopmentofallcountriesandthesurvivalofmankind,hasbecomeahotissue,arousinggreatconcernandextensiveattentionfromtheinternationalcommunity,Tocurbtheincreasingaggravationof

简介：

简介：

简介：ThestudywasmadebyobservingtheannualchangeofthegonadaldevelopmentofamphioxusinXiamencohtinuouslyfortwoyearsfromNovember,1986toNovember,1988.Wedeterminedthegonadaldiameter,gonadosomaticindexofeachamphioxus,andobservedthehistologicalcharacteristicofthegonadaldevelopmentofthefemaleandmalebycutsection,whichprovidedthebasisfordividingthestagesgonadsandthedetermininglevelofthegonadaldevelopmentofamphioxusineachmonth.