简介：ThedesignsoftheBeijingOlympicvenueshaveattractedmoreattentionfromaroundtheworldthanthoseinanyprecedingOlympicGames.Forthe2008Olym-pics,Beijinghasprepared31venues,including12thatarenewly-built,11thathavebeenimprovedorexpandedand8whicharetemporary.Uniqueworld-classvenueslikethe'Bird'sNest'andthe'WaterCube'haveshockedtheworld,fullyreflectingthethreeconceptsofholdinga'GreenOlympics,High-techOlympicsandPeople'sOlympics'.

简介：ActaMeteorologicaSinica(AMS),quarterly,whichissponsoredbytheChineseMeteoro-logicalSociety,hasbeenembodiedbyScienceCitationIndexExpanded(SCIE)andcoveredinThomsonReutersproductsandservicesbeginningwithVol.21(1),2007.

简介：Inrecentyears,scientistshavebeenincreasinglyinterestedintheenergyembodiedintradedgoodsamongcountries.Inthisarticle,thedirectenergyintensitiesinvariouseconomicsectorsofChinawerecalculatedwiththedataofenergyconsumptionandoutputvalueofeachsector,andtheinput-outputtablewasusedtoestimatetheexternalenergyconsumption.Thetotalenergyintensityofallsectorswasthenobtained.Fromthedataofinternationaltrade,theenergyembodiedingoodstradeofChinawasestimatedfortheperiodof1994-2001.Duringthisperiod,theaverageenergyintensityofimportedgoodswasalwayshigherthanthatofexportedones.Asacountrywithasurplusininternationalgoodstrade,Chinaactuallyimportednetembodiedenergyinthepastfewyears.Thenetembodiedenergyimportedwasatthesamemagnitudeoftheimportedenergyintheformoffossilfuels.

简介：Inrecentyears,China'senergydemandandGreenhousegas(GHG)emissionshavegrownveryfast,quiteanamountofwhichwasexportedasenergyembodiedingoodsininternationaltraderatherthanconsumeddomestically.Startingfromtheconceptofembodiedenergy,basedoninput-outputenergyanalysisapproach,inthispapertheenergyembodiedingoodsininternationaltradeofChinaduringtheperiodfrom2001to2006iscalculated.TheresultsshowthatalthoughChinahasbecomeanetimporterofpetroleumsince1993,Chinaisanetexporterofembodiedenergyduetointernationaltradeingoods.In2002,thetotalamountofenergyembodiedinexportedgoodswasabout410milliontce(tonofcoalequivalent,hereinafterreferredtoas'tce').Eliminatingtheamountofenergyembodiedinimportedgoodsofabout170milliontce,thenetexportofembodiedenergywasabout240milliontce,accountingfor16%oftheaggregateprimaryenergyconsumptionofthatveryyearinChina,andthenetexportofembodiedemissionswasabout150milliontonsofcarbon.WiththerapidgrowthofChina'sinternationaltrade,assumingnostructuralinput-outputchangesofamongsectors,in2006thenetexportofembodiedenergywentuptoabout630milliontce,anincreaseof162%over2002.Inaddition,thispaperalsoanalyzesthepossiblesourcesoferrorincalculation,andalsodiscussesthepolicyimplicationsaccordingtotheresultofthecalculation.

简介：AftertheKyotoProtocolwasimplemented,carbonleakageexertsgreatinfluencesoninternationaltradeandeconomy.Tradecreatesamechanismforconsumerstoshiftenvironmentalpollutionassociatedwiththeirconsumptiontoothercountries.ChinahasovertakentheU.S.astheworld'sbiggestCO2emittersince2006.AsChina'ssecondlargesttradepartner,theU.S.hasthebiggesttradedeficitwithChinawhichhasarousedalotofdisputesbetweenthetwoparties.ButsofartheassessmentsofthetradeimbalanceofChina-U.S.havepaidlittleattentiontoenvironmentalimpactsassociatedwiththetradeimbalance.Appliedaninput-outputapproach,thearticleestimatestheamountofCO2embodiedinChina-U.S.tradeduring1997-2007.ItwasfoundthatthroughtradewithChina,theU.S.reduceditsCO2emissionscomparedwithanon-tradescenario.Duetothegreatercarbon-intensityandrelativelylessefficientproductionprocessesofChineseindustry,China-U.S.traderesultedinmoreCO2emissionsinChinaandtheworld.Intheend,thearticlegivessomesuggestions:itisequalandsustainablethattheinternationalaccountingmethodologiesshouldbeimproved,forCO2emissionsresponsibilitymustbedesignedtoaccountforthedynamicnatureofinternationaltrade.

简介：HenryDavidThoreauandJamesFennimoreCooperareregardedasrepresentativesofAmericanRomanticism.Andacloseanalysisoftheirmasterpiecesrevealsquiteafewecologicaltracesinthem.Bycomparingtheirwritingstyleswitheco-literatureinAmerica,thepresentpaperfindsthattheyhavealotincommon.Baseduponthis,itistobebelievedthattheromanticisminthe19thcenturyofAmericabreedsthelaterecologicalliterature.

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.

简介：Thespin-polarizedlinearconductancespectrumandcurrent-voltagecharacteristicsinafour-quantum-dotringembodiedintoAharonov-Bohm(AB)interferometerareinvestigatedtheoreticallybyconsideringalocalRashbaspin-orbitinteraction.Itshowsthatthespin-polarizedlinearconductanceandthecorrespondingspinpolarizationareeachafunctionofmagneticfluxphaseatzerobiasvoltagewithaperiodof2π,andthatHubbardUcannotinfluencetheelectrontransportpropertiesinthiscase.Whenadjustingappropriatelythestructuralparameterofinter-dotcouplinganddot-leadcouplingstrength,theelectronicspinpolarizationcanreachamaximumvalue.Furthermore,byadjustingthebiasvoltagesappliedtotheleads,thespin-upandspin-downcurrentsmoveinoppositedirectionsandpurespincurrentexistsintheconfigurationspaceinappropriatesituations.Basedonthenumericalresults,suchamodelcanbeappliedtothedesignofaspinfilterdevice.