简介:Embodiedcarbonintradehasattractedtheattentionofresearchers,developers,andindustryleadersworldwide,asithasbecomeaconsiderablesourceoftradeconflict.BecauseChinaistheworld’sleadingcarbon-emittingcountry,itisimportanttostudythechangetrendsofembodiedCO2inChinesetradetoidentifykeyinfluencingfactors.ThispaperinvestigatesthetradeembodiedCO2inChina,withspecialfocusontheproductionprocessandmaterialsofeachindustrialsectorfrom1990to2013.Thisstudywasconductedbyusinganinput-outputmodel,whichanalyzesthespecificcausesofperiodicwaves.Ourfindingssuggestthatthemachinemanufacturingsectorproducedthelargestshareofemissions,whereasthemetalandnon-metalsectorhasthehighestemissionintensity.Moreover,thetotalemissionquantitiesintradeincreasedfrom612to3331milliontonsin1990to2013,aperiodcharacterizedbydecentralizedtrendsinemissionsexportedtotradepartners.Wealsoemployedthelog-meanDivisiaindex(LMDI)modeltodecomposethecarbonemissionschangesintoexportstructure,exportscale,energystructure,andenergyintensity,andestimatetheinfluenceofthesefactorsatanumberoftimepoints.Wefoundthatenergyintensitycurbsemissionsincrease,andthatexportscaleexpansionisthestrongestdrivingforce.
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简介:MarxandEnglesbelievedthatmanandnaturedevelopharmoniously,whentheactivitiesofmanconstitutethecontentofnature,whichischangedconstantlybecauseoftheactivitiesofman.MarxandEnglesalsopointedouttheduarityoftheconquest,changeandinfluenceexertedonnaturebyman.Ononehand,itcanimprovepeople'srivingconditionsandmakepeoplefreefromtheenslavementofthenature.Ontheotherhand,itmayalsoleadtoexcessivelysnatchingandwreckingnature,thenmakethedeteriorationoftheenvironmentandecologyoutofbalance.Theyalso,fromthetechnicalangleofecology,putforwardtheconcretemeasurestorealizetheharmonioussymbiosisofmanandnatureinthedevelopmentofeconomy.Theyalsobelievedthatonlywhensocialismorcommunismisrealized,cantheconciliationofmankindandnatureberealizedfinally.MarxandEngle'stheoryofharmonioussymbiosisofmanandnatureisofgreattheoreticaldirectivesignificanceforustoinsistonthescientificdevelopmentview.
简介:摘要:多功能提取罐是药物、食品、化工领域中常用的专用设备,主要被应用到溶剂回收、植物提取以及浓缩等生产工艺中,其能够借助气压实现自动化排渣,具有良好的安全性与可靠性。中药提取是当前中药生产中的基础环节,提取液的实际获取率与中药产品最终的收率之间有紧密关联。为避免有效成分过多流失,应合理选取与运用提取设备。本文首先对多功能提取罐具有的技术特点进行总结,而后结合残渣中有机溶剂的回收需求,提出了改造常规提取罐的对策与后续处理方法,并对比了不同设备的回收效果,发现改造提取罐的方法能够提供最高的综合效益,在提升溶剂收集量,降低残渣含液量的同时,不会过多地增加生产成本。
简介:摘要:多功能提取罐是药物、食品、化工领域中常用的专用设备,主要被应用到溶剂回收、植物提取以及浓缩等生产工艺中,其能够借助气压实现自动化排渣,具有良好的安全性与可靠性。中药提取是当前中药生产中的基础环节,提取液的实际获取率与中药产品最终的收率之间有紧密关联。为避免有效成分过多流失,应合理选取与运用提取设备。本文首先对多功能提取罐具有的技术特点进行总结,而后结合残渣中有机溶剂的回收需求,提出了改造常规提取罐的对策与后续处理方法,并对比了不同设备的回收效果,发现改造提取罐的方法能够提供最高的综合效益,在提升溶剂收集量,降低残渣含液量的同时,不会过多地增加生产成本。
简介:Withtheexploitationofnon-renewablenaturalresourcesinthetraditionalresource-basedenterprises,theresources-waste,environmentalpollutionandecologicaldestructionarebecomingmoreandmoreserious.Underthebackgroundofecologicalcivilizationconstruction,thegreentransformationofresource-basedenterprisesinthewesternregionisextremelyurgent.Throughthereviewofrelatedliteratures,basedonsustainabledevelopmenttheoryanddynamiccapabilitytheory,thepaperstudythebasiccharacteristicsanddifficultiesofwesternresource-basedenterprises,andanalyzetheecologicalnetworkandbasicpathofenterprise.Combinedwiththeactualcase,thisstudyanalyzesthemotivation,conditions,restrictivefactorsandtransitionpathofresource-basedenterprisesgreentransformationinthewesternregionsandthenputsforwardcountermeasuresandsuggestionsfortherealizationofresource-basedenterprisesgreentransformation.
简介:TheCrestedIbis(NipponiaNippon)isendemictoQinlingMountainsofChinaandwasonceabundantovervastareasofnorth-eastofAsiahabitat.Duringthe20thcentury,however,thepopulationdeclinedgreatlyinnumbers.Habitatqualityusedtobethemainthreattothisspeciesbutrecentactionsbythegovernmentandwildlifeprotectionorganizationshavebroughtthisundercontrol.WiththeestablishmentofCrestedIbisNatureReserveinChina,conflictsbetweensocio-economicdevelopmentandCrestedIbisconservationhavebecomemoreacute.HowdowedealwiththerelationbetweenCrestedIbisconservationandcommunitydevelopment?Inthisstudy,theCrestedIbisNatureReserveco-managementmodelnamely'companies+farmers+NatureReserve'modelisproposedandevaluatedwithdemonstrationinvestigationmethods,includingcontinuoussix-yearfixed-sitesocio-economicdevelopmentdataofsurroundingcommunity,companysalesrevenuedataandmonitoreddataofCrestedIbisNatureReserve.Theresultsshowthatfarmers'incomeandconservationawarenessincreasedgreatlyfrom2003to2008;companysalesrevenuehasincreasedbyabout20%annuallyintherecentyears;managementlevelhasnoticeablyimprovedinNatureReserve,thescopeofCrestedIbishabitathasexpanded50hm2;chemicalcompositionofhabitatreducedyearafteryear;andthenumberofCrestedIbishadbeengrowingannually.Attheend,thesuccessofthemodelisevaluated,andproblemsinimplementationofthemodelarediscussedfromthefollowingaspects:managementsystem,co-managementconcept,economicbaseofpartners,marketingmechanism,technicalcapacityandsoon.