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212 个结果
  • 简介:IntroductionThehydropowerandwindpowerbeingthekindsofre-newableenergythatarerelativelyrichinresourcesbutarere-strictedlargelybythelocality.Onthecontrary,photovoltaicpowerislessrestrictedbythelocalityoftheresources,andissafe,reliable,noiseless,non-pollutant,andneedsneitherfuelconsumptionnortheerectionoftransmissionfacilities,itmayberealizedrightinplacesofconsumptioninlargeorsmallscale

  • 标签: PHOTOVOLTAIC LOCALITY RESTRICTED contrary facilities POLLUTANT
  • 简介:Developmentofagri-cultureandanimalhusbandryinTibetoverthepast50yearshasplayedanimportantroleinlocaleco-nomicdevelopment.However,withChina’saccessiontotheWTO,thegoalofagriculturalproductionandlivestockbreedingischangingfromprovidingthepublicwithfoodtoincreasingtheincomeoffarmersandherders.Whilethepublicshowsmorecon-cernformarketeconomicdevelopmentandprotectionof

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  • 简介:Larixspp.woodisoneofthemajorfast-growingtreespeciesinChina,whichalsohasthemostforeststorageinthenortheastofChina.SeveralkeypropertiesmodificationmethodsandachievementsofLarixspp.woodweresummarizedbasedontheircharacteristics.TechnologyproblemsofpropertiesmodificationandnewuseprospectofmodifiedLarixspp.woodwerealldiscussed.

  • 标签: LARIX spp. wood MODIFICATION research STATUS
  • 简介:Thispapergivesasystematicviewofthenewtrendsofglobalcarbonfinanceinnovationunderthechallengeofglobalclimatechangeandintheprocessoftransitiontoachieveeconomicgrowthfrom'highcarbon'to'lowcarbon',coveringthefollowingaspects:thestructure,statusquoanddevelopingtrendofglobalcarbonmarket.Thepaperdiscussestheinnovationinfinancialorganizationandservicesystemsandgovernments'overallguidanceandpolicysupport,anddrawstheconclusionthattheworldisundergoingmassivechangeswithgovernmentsactivelyrespondingtocarbonfinancetoembracethetremendousopportunitiesforcleanenergyandclimatechangeinfinancialindustry.Toseizetheopportunity,acompleteandoverallcarbonfinancesystemofChinashouldbeputinthetopoftheagenda.Giventhecurrenttasksofenergyconservationandpollutionreductionandthegrowingdemandforcapitalinput,Chinaneedstoconstructanclearofpolicyguidance,adiversifiedfinanciaservicesystem,andamulti-approachcarbonfinancesystemtointensifyandwidentheparticipationoffinancialindustry,toexpandfinancingchannelsforsustainableeconomyandspreadrisks,andfinally,workoutaninexpensivesolutiontotherealizationofChina'slowcarbontarget.

  • 标签: 金融创新 发展趋势 球碳 全球气候变化 经济增长 服务体系
  • 简介:Analysisoftheissuecallsforsomequestionsofmethodology.First,thelawofhistoricaldevelopmentteachesthatallcountries,nomatterhowstrongtheymaybe,willeventuallydecline.SothepointisnotwhethertheUnitedStateswillbeanexception,butwhenandhowwillthedayofreckoningdescendontheworld'scurrentsolesuperpower.

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  • 简介:IllegallogginghasbecomeaseriousprobleminforestmanagementinASEAN.Inthepaper,theillegalloggingstatusinASEANisintroduced,anditissurethatIndonesia,Malaysia,Brunei,Laos,MyanmarandCambodiaareproductioncountries,ThailandandVietnamaretheprocessingcountries,andPhilippines,Singaporeareconsumercountriesinthewholesupplychainofillegallogging.Aswell,thetradeflowsofillegalforestproductsofASEANarechecked,thecauseofillegallogginganditsproducingimpactsareassessed.Totackleillegallogging,onefeasiblewayistodesignecologicalsupplychaintosuperviseillegalloggingprocess,andundertheconceptofecologicalsupplychain,theproductioncountries,processingcountriesandconsumercountriesshouldtakeactionstogether.Non-ASEANcountriesshouldimprovebordercontrol,introducepublicprocurementpolicies,promotemarket-basedinstruments,andstrengtheninternationalcooperation.ForASEANcountries,theyshouldestablishcooperationmechanismswithintheregion,takeaunifiedaction,increasegovernancecapacityandpromotelegalityverificationorsustainabilitycertification.

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  • 简介:WithfrequentdisastrousweathersandincreasinglyprominentGHGeffectsinrecentyears,normalexistenceanddevelopmentofmankindarefacingunprecedentedthreatsandchallenges.GHGemissionsmitigationfortheglobalclimatechangeshasbeenthefocusofconcernoftheworld.Asthebiggestdevelopingcountryandthesecondlargestcountryofcarbon-emission,Chinaattachesimportancetothecarbonemissionreduction.ThemajorGHGcomponentiscarbondioxideandinChina,theemissionofcarbondioxideismainlyfromindustrialproduction.Inthepaper,thestatusandtrendofCo2emissionfromindustrialdepartments,high-carbonemissionanditsspecificindustriesareshowninstatistics.Meanwhile,thepolicyenvironment,industrialorganizationstructureandtechnologyofcarbonhighemissionarealldiscussedbasedonpracticalsituationsinthesedepartmentsandindustries.Attheend,throughtheanalysisofgraycorrelation,correlativityisexploredforbothfossilenergyconsumptionandtotalcarbonemission,andalsofortheproductionvalueandcarbonemissionofeachindustrialsector.Somepolicyproposalsfortheestablishmentoflow-carbonindustriesandtransitionofeconomicdevelopmentpatternaresetforth.

  • 标签: 二氧化碳排放 能源消耗 工业生产 温室气体排放量 发展中国家 灰色关联度分析
  • 简介:WiththeriseofChina'spositionintheinternationalpoliticalandeconomicfields,theWestbegantoquestionChina'sdevelopingcountrystatus.thewrongperceptionoftheWestliesprimarilyinthefollowingaspects:first,thevaguenessoftheconceptof'developingcountries'andthetendencytowardsnarrowingthenotion;second,thewesterncountriesarepressingChinatoshouldermoreinternationalresponsibilitiesinsodoing.

  • 标签: 发展中国家 西方国家 国际政治
  • 简介:Propertiesofthesoilsurfacelayer,thetemporalpatternofthemicroclimatevariablesaswellascropconditionwerecombinedtoanalyzethecharacteristicsoftheevapotranspirationfromwinterwheatfieldsinasalinesoilarea.Inordertoaccomplishthisanalysis,evapotranspirationwasdividedintoevaporationfromthesoilandtranspirationfromwheat.Moreover,theeffectofsoilsalinityonevapotranspirationwasevaluatedthroughtherelationshipbetweenactualevapotranspirationandpotentialevapotranspiration(Ea/Eo)andthetotalsoilwaterpotential(ψ)wasdividedintotwocomponents:matricpotential(ψM)andosmoticpotential(ψo).Twositeswithdifferentsalinitylevelswerechosenforthisstudy,locatedinHebeiProvince,China.MeasurementswereconductedinApril-May1997andMay1998.TheBowenratiomethodwasusedtoestimatetheactualevapotranspiration(Ea),whereaspotentialevapotranspiration(Eo)wasestimatedusingPenman'sequation.Measurementsofsoilevaporation(Es)wereobtainedwithmicro-lysimeters,andtranspirationwascalculatedfromthedifferencebetweenEaandEs.Theresultsshowthattranspirationcomprisedonaveragealmost80%oftotalevapotranspiration.Evaporationfromthesoildifferedslightlybetweenyears,butthisvariationwasdominatedbytheleafareaindex(LAI),whichrangedfrom4to5duringthestudyperiodof1997and1998.Soilelectricconductivity(EC),whichisdirectlyrelatedtoosmoticpotential,rangedfrom1.9to3.5mScm-1in1997andwasnegligiblein1998.Ourresultsindicatethatlowerosmoticpotentialdecreasesthetotalsoilwaterpotential,thusaffectingplanttranspiration.Hence,itispossibletosaythatsoilsalinityactuallydecreasesevapotranspirationfromwinterwheatfields.

  • 标签: 土壤水分蒸发蒸腾损失总量 潜在的土壤水分蒸发蒸腾损失总量 土壤咸度 水潜力 小麦
  • 简介:PyriculariaoryzaeanamorphofMagnaportheoryzaeisoneofthemostnotoriousfungalpathogenscausingsevereeconomiclossinriceproductionworldwide.Variousmethods,viz.cultural,biologicalandmolecularapproaches,areutilizedtocounteractthispathogen.Moreover,sometolerantorresistantricevarietieshavebeendevelopedwiththehelpofbreedingprogrammes.Isolationandmolecularcharacterizationofdifferentblastresistancegenesnowopenthegatefornewpossibilitiestoelucidatetheactualallelicvariantsofthesegenesviavariousmolecularbreedingandtransgenicapproaches.However,thebehavioralpatternofthisfungusbreakupstheresistancebarriersintheresistantortolerantricevarieties.Thishost-pathogenbarrierwillbepossiblycounteredinfutureresearchbycomparativegenomicsdatafromavailablegenomesequencedataofriceandM.oryzaefordurableresistance.Presentreviewemphasizedfascinatingrecentupdates,newmolecularbreedingapproaches,transgenicandgenomicsapproaches(i.e.miRNAandgenomeediting)forthemanagementofblastdiseaseinrice.Theupdatedinformationwillbehelpfulforthedurable,resistancebreedingprogrammeinriceagainstblastpathogen.

  • 标签: BACKCROSS BREEDING gene PYRAMIDING ALLELE mining
  • 简介:AbstractCardiovascular disease (CVD) and environmental degradation are leading global health problems of our time. Recent studies have linked exposure to heavy metals to the risks of CVD and diabetes, particularly in populations from low- and middle-income countries, where concomitant rapid development occurs. In this review, we 1) assessed the totality, quantity, and consistency of the available epidemiological studies, linking heavy metal exposures to the risk of CVD (including stroke and coronary heart disease); 2) discussed the potential biological mechanisms underlying some tantalizing observations in humans; and 3) identified gaps in our knowledge base that must be investigated in future work. An accumulating body of evidence from both experimental and obser- vational studies implicates exposure to heavy metals, in a dose-response manner, in the increased risk of CVD. The limitations of most existing studies include insufficient statistical power, lack of comprehensive assessment of exposure, and cross-sectional design. Given the widespread exposure to heavy metals, an urgent need has emerged to investigate these putative associations of environmental exposures, either independently or jointly, with incident CVD outcomes prospectively in well-characterized cohorts of diverse populations, and to determine potential strategies to prevent and control the impacts of heavy metal exposure on the cardiometabolic health outcomes of individuals and populations.

  • 标签: Heavy metal Cardiovascular disease Hypertension Stroke Coronary heart disease