简介：Inrecentyears,thepotentialofrenewablegreenenergysourceshasbeenextensivelystudied.Theproventechnologywhichisphotovoltaicsolarcellsstrictlydependsondaylightandproduceslow-efficiently.Toovercometherestrictions,onetechnologystudiedisthroughharvestingthethermalradiationenergywhichcanprovidea24-hourenergysource.Thecontinuityofenergysourcespromisesverygoodenergyconversionespeciallyformilitaryapplications.Thisarticlepresentsanewstructurethatcanharvesttheabundantthermalradiationenergyintousableenergyatthewavelengthof10μm.Arectangularstructurewithaperturbationslitwasdesignedtointegratewitharectifiercircuitforgreenenergyconversion.Theslittunneljunctionguidedtheelectromagneticfieldintoajunctionwheretheenergycouldbecollectedandconverted.Anenhancementfactorofapproximately110.6canbeachievedbyaperturbationslitlengthof1.0μm.Theresultsextractedfromtheproposeddesignpromiseabettercandidatetoovercomethedisadvantagesofphotovoltaicsolarcellsforenergyharvestingdevices.

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简介：Themediumaccesscontrol(MAC)protocolforindoorvisiblelightcommunication(VLC)withenergyharvestingisexploredinthispaper.Theunfairnessofthroughputexistsamongdevicesduetothesignificantdifferenceoftheirenergyharvestingrateswhichchangeswithdistance,acceptanceangleandtheobstructionprobability.Weproposeanenergyharvestingmodel,anewobstructionprobabilitymodelandanenergyadaptivecontentionalgorithmtoovercometheunfairnessproblem.Thisdevicecanadjustitscontentionwindowaccordingtotheenergyharvestingrate.Asaresult,thedevicewithlowerenergyharvestingratecangetshortercontentionwindowtoimproveitstransmissionopportunity.SimulationresultsshowthatourMACprotocolcanachieveahigherdegreeoffairness.

简介：Weexamineanenergyharvestingsystemoftwomagnetopiezoelasticoscillatorscoupledbyelectriccircuitanddrivenbyharmonicexcitation.Wefocusontheeffectsofsynchronizationandescapefromasinglepotentialwell.Inthesystemwithrelativemistuninginthestiffnessoftheharvestingoscillators,weshowthedependenceofthevoltageoutputfordifferentexcitationfrequencies.

简介：这份报纸论述方法由压电的生成器从沥青人行道收获机械精力。结果证明在沥青人行道的势能能每公里每小巷直到150kW/h。机械精力的部分能被压电的变换器收获。七个典型变换器的表演通过有限元素分析被检验。PZT堆的结果表演并且多层，在沥青人行道环境的钗钹和桥罐头工作。PZT堆积并且多层更高让精力变换评价。然而，如果这些变换器在人行道直接被嵌入，全部的收获精力是小的。一个原型人行道发电机用PZT堆积被开发增加收获精力。发电机能在交通拥挤下面从人行道收获超过50kW/h精力。816PZT堆积为一个发电机被推荐。圆形状被建议让PZT堆积减少应力的集中。并且多层的结构被推荐因为PZT堆发电机的电的潜力到减少。生成器能在沥青人行道作为传感器被扩大，它能被用来监视交通，人行道压力和温度。

简介：Thepotentialforharvestingenergyfromaflexibledeltawingusingapiezoelectricbimorphisexperimentallyinvestigated.Differentconfigurationsoftheproposedharvestingsystemweretestedinawindtunneloverabroadrangeofairspeeds.Inadditiontoevaluatingthelevelofharvestedpower,ananalysisisperformedtoextractcriticalaspectsfortherelationbetweenspeed,flexibility,geometryandthepotentialpowerthatcanbeharvestedfromaclamped,cantileveredflexibledeltawingatlowanglesofattackandlowspeeds.Thisanalysisprovidesaninsightintoparametersthatimpactenergyharvestingfromflexiblemembranesorelements.

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简介：Amodifiedsnap-throughmechanismisusedinanelectromagneticenergyharvestertoimproveitseffectiveness.Itmainlycomprisesthreespringsthatarecon-figuredsothatthepotentialenergyofthesystemhastwostableequilibriumpoints.Inparticular,thesmallvibrationbehavioroftheharvesteraroundoneoftheequilibriumsisofinterest.Amulti-scalemethod(MSM)isusedtoanalyzethefrequencyresponsecurve.Twosnap-throughmechanismsareconsidered.Onehasbothhorizontalandverti-calsprings.Theotherhasonlyhorizontalsprings.Thefrequencyresponsecurvesofthesetwoclassesarecomparedunderthesameexcitationandelectricloadingconditions.Thelatterexhibitsmorebendingofthefrequencyresponsecurvethantheformerone.Theresultsarealsovalidatedbysomenumericalwork.TheaveragedpowersubjecttotheGaussianwhitenoiseiscalculatednumerically,andtheresultsdemonstratethatbi-stableenergyharvestingwithonlyhorizontalspringscanoutperformthemechanismwithbothhorizontalandverticalspringsforthesamedistancebetweentwoequilibriums.

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简介：Whateverworriesaboutinvestmentsinnewenergyprojectswilloccurinthefutureandathand.ThishasalwaysbeenasubjectfordebatesincetheLawofRenewableEnergyResourceswasissued.

简介：Wingfappingandmorphingcanbeverybenefcialtomanagingtheweightofmicroairvehiclesthroughcouplingtheaerodynamicforceswithstabilityandcontrol.Inthisletter,harvestingenergyfromthewingmorphingisstudiedtopowercameras,sensors,orcommunicationdevicesofmicroairvehiclesandtoaidinthemanagementoftheirpower.Theaerodynamicloadsonfappingwingsaresimulatedusingathree-dimensionalunsteadyvortexlatticemethod.Activewingshapemorphingisconsideredtoenhancetheperformanceofthefappingmotion.Agradient-basedoptimizationalgorithmisusedtopinpointtheoptimalkinematicsmaximizingthepropellentefciency.Tobeneftfromthewingdeformation,weplacepiezoelectriclayersnearthewingroots.Gausslawisusedtoestimatetheelectricalharvestedpower.Wedemonstratethatenoughpowercanbegeneratedtooperateacamera.Numericalanalysisshowsthefeasibilityofexploitingwingmorphingtoharvestenergyandimprovingthedesignandperformanceofmicroairvehicles.

简介：Theshallowcylindricalstructureissuitabletodevelopbroadbandvibrationenergyharvestersduetothepropertyoftheinherentmechanicalbistability.Inthisletter,theoptimumdesignofthebistablecylindricalshellforbroadbandenergyharvestingapplicationisinvestigatedfromthestructuralpointofview.Theoutputpowerisevaluatedbytheconceptoftheharvestablepower,whichbalancesthefrequencyofsnapthroughandthereferredoutputenergyassociatedwitheachsnapthrough.Thenondimensionalharvestablepowerisanalyticallyexpressedasthefunctionofthenon-dimensionalcurvatureparameterandoneconstructedparameter.Theuniversaldependenceoftheoptimalcurvatureparameterandtheassociatedoptimalharvestablepowerontheconstructedparameterisderived,whichcanbewellapproximatedbythelinearrelationindoublelogarithmiccoordinate.

简介：美国：美国GreenEnergyResources公司宣布接受一项为期5年，每年发货36次，年交易额6100万美元的合同，向欧洲提供能源木片，预计2009年收益5000万美元，2010年1亿美元，2011年占有欧洲能源木片进口20％的份额。该公司为电力行业提供木片或木纤维燃料，主要市场是欧洲。目前，美国市场尚在形成阶段，预料会有持续的扩展。GreenEnergyResources公司是一家环境友好的公司，木片来自城市废弃木材、回收木材和灾害摧毁的树木。

简介：Duetotheirparticularopticalcharacteristics,metallicislandfilmshavethepotentialtosignificantlyincreasetheenergyconversionefficiencyofsolarcell.Weexperimentallyandtheoreticallyinvestigatedtheeffectofsubstratetemperatureonthemorphologiesandopticalpropertiesofthesilverislandfilms.Atlowtemperature,below300℃,asthesubstratetemperatureincreases.Comparedtothefilmspreparedatroomtemperature,thesizesofnanoparticlesdecreaseandtheAbsorptionpeaksshifttoshorterwavelengthaccompaniedbyanincreasedensityresultingina150%Absorptionefficiency.Asthesubstratetemperaturegoesupto300℃,nanoparticleswithlargerin-plan(X-Y)dimensionsareformed,thenumberdensitydecreasesandtheAbsorptionpeaksredshiftbuttheAbsorptionefficiencyisstill10%higher.Numericalsimulationrevealsthatthesebehaviorsareaconsequenceofmorphologiestransformation.

简介：It'sbeenprovedbytheoryandpracticethattaxationpolicyisoneoftheimportantmeansofrealizingenergysavingandemissionreduction.ThegreentaxationsystemintheWesterncountrieshasgotbettereffectsinenergysavingandenvironmentalprotection.Intherecentyears,Chinahasinsuccessionreleasedsometaxationpoliciespromotingenergysavingandemissionreduction,butstillhasahugegaptomeettherealneedsofenergysavingandemissionreduction.ByanalyzingChina'sstatusquoofthepolicesofenergysavingandemissionreductionanddrawinguponexperiencesofthedevelopedcountriesaboutgreentaxation,thispaperpresentshowtoperfectideasofChina'senergysavingandemissionreductiontaxationpolicies:adjustingtaxesrelevanttogreentaxationinthecurrenttaxationsystem,suchasresourcetax,consumertax,andsoon;collectingnewenvironmentaltax;perfectingthepreferentialtaxationpoliciesfortheenergysavingandenvironmentalprotectionindustries.

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简介：green[gn：n]绿色的，绿色Thecountryisverygreeninspring．春天的时候，乡村一片青葱碧绿。

简介：Inthepresentstudythemembranefoulinginmicrofiltrationusedforcellharvestinginadeadendsystemhasbeeninvestigated.experimentalresultswereanalysedintermsofexitingmembranefiltrationmodelsandmembraneresistances.Thecakefiltrationmodel(CFM)andstandardblockingmodel(SBM)havebeenconsideredinthisstudy.Variousmembraneresistancesweredeterminedatdifferentprocessingtime,feedconcentrationandstirringspeed.Resistancestopermeationinthissystemincludefiltermedium,poreblocking,adsorption,cakelayerandconcentrationpolarization.

简介：Pamela，Mary和Henry一起上学去。沿路线。把字母顺序写在空格内。谁没用环保的交通工具呢？