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500 个结果
  • 简介:Highperformancecontrolofaninteractiveprocesssuchasironandsteelplantreliesonabilitytohonorsafetyandoperationalconstraints;reducethestandarddeviationsofvariablesthatneedtobecontrolled(e.g.productquantity,quality);de-bottleneckingtheprocess;and,maximizeprofitabilityorlowercost(e.g.energysavings,improvehotmetalcontent).Theseobjectivesmaybeprioritizedinthisorder,butcanvaryandareverydifficulttoachieveoptimallythroughconventionalcontrol.Amultivariablepredictivecontrollersolution,alongwithitsextensiveinferentialsensorandbuilt-inoptimizer,providesonlineclosedloopcontrolandoptimizationformanyinteractivemetalandminingprocessestolowertheenergycost,increasethroughput,andoptimizeproductqualityandyield.Controlloopperformanceisalsoakeyfactortoimproveironandsteelplantautomationandoperationresult;HoneywellCPMoffersvender-independentproductwhichprovidesmonitoring,tuning,modelingofcontrolloopandsustainableloopperformanceanalysisandmaintenancesolutiontowardsoperationstabilityandenergysaving.

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  • 简介:WiththedevelopmentofCMOSandMEMStechnologies,theimplementationofalargenumberofwirelessdistributedmicro-sensorsthatcanbeeasilyandrapidlydeployedtoformhighlyredundant,self-configuring,andadhocsensornetworks.Tofacilitateeaseofdeployment,thesesensorsoperateonbatteryforextendedperiodsoftime.Aparticularchallengeinmaintainingextendedbatterylifetimeliesinachievingcommunicationswithlowpower.Forbetterunderstandingofthedesigntradeoffsofwirelesssensornetwork(WSN),amoreaccurateenergymodelforwirelesssensornodeisproposed,andanoptimaldesignmethodofenergyeffcientwirelesssensornodeisdescribedaswell.DifferentfrompowermodelsevershownwhichassumethepowercostofeachcomponentinWSNnodeisconstant,thenewonetakesintoaccounttheenergydissipationofcircuitsinpracticalphysicallayer.Itshowsthattherearesomeparameters,suchasdatarate,carrierfrequency,bandwidth,Tsw,etc,whichhaveasignificanteffectontheWSNnodeenergyconsumptionperusefulbit(EPUB).Foragivenqualityspecification,howenergyconsumptioncanbereducedbyadjustingoneormoreoftheseparametersisshown.

  • 标签: WSNS 能量模式 最优设计 通信技术
  • 简介:Manydevelopedcountrieshaveeverexperiencedtheperiodofheavyindustry;however,manyofthemhavecontrolledwelltheirenergyconsumptionsandkepttheenergyelasticityfactorsaroundT.What'sthereason?Intheauthors'opinion,ifdoeshavebusinesswiththeirdevelopmentideologies.

  • 标签: 节能 意识形态 科学性 可持续发展
  • 简介:Recently,theSuggestionsonTenKeyEnergySavingProjectsinthe11thFive-YearPlanPeriod,jointlyworkedoutbyNDRCandotherdepartmentsconcerned,wasofficiallyissued.Itisworthnoticethat80%ofthetenprojectsarerelativetotheelectricpowersectors.Uponimplementationofthetenkeyprojectsinthe11thFive-YearPlanperiod,itisexpectedthatthestandardcoalconsumptioncanbereducedby240milliontons,and

  • 标签: 电力部门 节能 电力工业 NDRC 发展规划
  • 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:Thetemperatureis56.5°Cwhenacetonegasisrectifiedduringtheproductionofpowderyphospholipid.Ifheatexchangerisadded,heatenergythatisreclaimedcanbeusedbyotherheaters.Onthebasisofexchangehotwater(51°C)4m3everyminute,afactorywiththeproductivityofpowderyphospholipidbeing10tonadaycansave533.2tonstandardcoalwhichisequivalentto746.48toncommoncoal.Ifthistechniqueofsavingenergyandreducingemissioncouldbewidelyusedincorrelativeindustriesofalloverthecountry,economicbenefitswillbeprominent.

  • 标签: 热能回收 生产厂 磷脂 粉状 再利用 废气排放
  • 简介:这篇文章建议一个精力为无线传感器网络的有效聚类路由(EECR)算法。算法能把一个传感器网络划分成一些簇并且在在所有传感器节点之中均匀地导致更多的一致精力驱散的重量价值上选择一个簇头库。模拟和结果证明算法能节省全面精力消费并且扩大无线传感器网络的一生。

  • 标签: 无线传感网络 聚类 路径 能量消费
  • 简介:Chinahaswitnessedrapideconomicdevelopmentsince1978,andduringthetime,energyproductionandconsumptiondevelopedatatremendousspeedaswell.EnergyefficiencywhichcanbemeasuredbyenergyconsumptionperunitofGDP,however,experiencedcontinuousdecrease.Theoretically,thechangeofenergyefficiencycanbeattributedtoindustrystructuralchangeandtechnologicalchange.InordertoexplainthetransformationofChineseenergyefficiency,weadoptlogarithmicmeanDivisiaindextechniquestodecomposechangesinenergyintensityintheperiodof1994-2005.Wefindthattechnologicalchangeisthedominantcontributorinthedeclineofenergyintensity,butthecontributionhasdeclinedsince2001.Thechangeinindustrystructurehasdecreasedtheenergyintensitybefore1998,butraisedtheintensityafter1998.Decomposedtechnologicaleffectsforallsectorsindicatethattechnologicalprogressesinhighenergyconsumingindustriessuchasrawchemicalmaterialsandchemicalproducts,smeltingandpressingofferrousmetals,manufactureofnon-metallicmineralproductsandhouseholdcontributearetheprincipaldriversofChina'sdecliningenergyintensity.

  • 标签: 能源效率 技术进步 工业结构 中国 能源强度 能源消耗
  • 简介:Disccuttersarethemostcriticaltoolforexcavationbytunnelboringmachine(TBM).Basedontheenergyconservationlaw,finite-elementmodeling,andelastic–plasticcontinuumtheoryfortunnelingbyTBM,theinteractionbetweendisccuttersandrockmasswasexamined.First,thedisccuttermotionwasstudiedtoestablishthedisccutterstrainequationsasafunctionoftime.Second,byusingelastic–plastictheory,arockstrainmodelwasconstructed.Finally,athree-directionalforcemodelwithtime-varyingcharacteristicswasestablishedfordisccuttersduringrockbreaking.ThemodelwasappliedtotheQinlingMountainsTunneloftheLan-YuRailway.Modelcutterheadthrustandtorquevalueswerefoundingoodagreementwithactualdata.Inbrief,themodelcanbeusedtopredicttheTBMperformanceandexaminethemechanismofrockbreaking.

  • 标签: TUNNEL BORING machine DISC CUTTER MICROMECHANICS
  • 简介:Focusingonhighenergyconsumptionofrefractories,ourresearchworksaboutmonolithicrefractorieswereintroduced,suchasbauxite-basedcorundum,microporouslight-weightbauxite-basedclinker,light-weightalumina-richspinel,magnesiamicropowder,fast-dryingrefractorycastablesofblastfurnace,largearealong-lifefast-sinteringflingrefractoriesforconverter,high-strengthlight-weightmullitecastablesforladlepermanentliner,high-strengthandlow-conductivityforsterite-vermiculiteinsulatingboard,basicshotcretingcastablesforladlepermanentliner,magnesiacalciagunningmixforRHrefiningfurnace,andlight-weightcastablesinpetrochemicalindustry.

  • 标签: 不定型耐火材料 轻质浇注料 耐火浇注料 应用 节能 喷射混凝土
  • 简介:Asglobalenergydemandscontinueincreasing,theconstantimprovementofenergyefficiencyhasbeenaconsensusintheworldwideandreceivedmoreandmoreattentionfromnotonlythetechnicalbutalsothesociological,economic,andpoliticalsectors.Energyefficienttechnologieshavebeennotonlytransformingthewaythatenergyisproduced,delivered,andconsumed,butalsochangingeveryaspectofourlifeandeventhefuture.1Toencourageresearcherstobecomeevenmore

  • 标签: 高效节能技术 编辑 能源需求 能源效率 消费方式 社会学
  • 简介:TheUnitedStatesisthemostdevelopedcountryintheworldandthenumberoneenergy-importingcountry.Chinaisthelargestdevelopingcountryandthenumbertwoenergy-importingcountry.TheenergyissueisthusakeyissueinSino-USRelations.TheUnitedStateshasbeenonbadtermswithsomeenergy-rich'problemcountries',whiletheenergycooperationbetweenChinaandthesecountriesisstartingtogowell.Sino-USrelationsnowaffectthewholeworld,andChina'sandtheUnitedStates'relationswiththesekeyenergyproducers—the'thirdpartyfactor'maybecomeamajorsourceofcompetitionandconflictbetweenthetwopowers.

  • 标签: 能源问题 第三方 发展中国家 因子 能源合作 世界
  • 简介:Interfacedislocationsmaydramaticallychangetheelectricproperties,suchaspolarization,ofthepiezoelectriccrystals.Inthispaper,westudythelinearinteractionsoftwointerfacedislocationloopswitharbitraryshapeingenerallyanisotropicpiezoelectricbi-crystals.Asimpleformulaforcalculatingtheinteractionenergyoftheinterfacedislocationloopsisderivedandgivenbyadoublelineintegralalongtwocloseddislocationcurves.Particularly,interactionsbetweentwostraightsegmentsoftheinterfacedislocationsaresolvedanalytically,whichcanbeappliedtoapproximateanycurvedloopsothatananalyticalsolutioncanbealsoachieved.Numericalresultsshowtheinfluenceofthebi-crystalinterfaceaswellasthematerialorientationontheinteractionofinterfacedislocationloops.

  • 标签: 相互作用能 晶体界面 压电晶体 位错环 界面位错 电学性质
  • 简介:Consideringtheadditionalelectricenergygeneratedafterthefulloperationoftheundergroundhydropowerstation,theelectricenergyaccommodationoftheThreeGorgesProject(TGP)isreviewed.Itisfocusedontheadditionalelectricityaccommodation,basedontheresearchattheearlystage.Theelectricenergyaccommodationsolutionsarerecommendedasthat,basedonthecost-benefitanalysisofthepowerdistributionarea,theadditionalelectricenergyoftheThreeGorgesshouldbegivenprioritytomeettheneedsatthesupplyendofHubeiandChongqing.TheresultsofthisresearchhasareferencevalueontheimplementationoftheThreeGorgeselectricpoweraccommodation,afterthefurtheroptimizationofthetransmissioncurvesinbothwetanddryseasons.

  • 标签: 三峡水电站 住宿 电能 成本效益分析 三峡工程 地下水电站