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.
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.
简介:Recently,theSuggestionsonTenKeyEnergySavingProjectsinthe11thFive-YearPlanPeriod,jointlyworkedoutbyNDRCandotherdepartmentsconcerned,wasofficiallyissued.Itisworthnoticethat80%ofthetenprojectsarerelativetotheelectricpowersectors.Uponimplementationofthetenkeyprojectsinthe11thFive-YearPlanperiod,itisexpectedthatthestandardcoalconsumptioncanbereducedby240milliontons,and
简介:WithfrequentdisastrousweathersandincreasinglyprominentGHGeffectsinrecentyears,normalexistenceanddevelopmentofmankindarefacingunprecedentedthreatsandchallenges.GHGemissionsmitigationfortheglobalclimatechangeshasbeenthefocusofconcernoftheworld.Asthebiggestdevelopingcountryandthesecondlargestcountryofcarbon-emission,Chinaattachesimportancetothecarbonemissionreduction.ThemajorGHGcomponentiscarbondioxideandinChina,theemissionofcarbondioxideismainlyfromindustrialproduction.Inthepaper,thestatusandtrendofCo2emissionfromindustrialdepartments,high-carbonemissionanditsspecificindustriesareshowninstatistics.Meanwhile,thepolicyenvironment,industrialorganizationstructureandtechnologyofcarbonhighemissionarealldiscussedbasedonpracticalsituationsinthesedepartmentsandindustries.Attheend,throughtheanalysisofgraycorrelation,correlativityisexploredforbothfossilenergyconsumptionandtotalcarbonemission,andalsofortheproductionvalueandcarbonemissionofeachindustrialsector.Somepolicyproposalsfortheestablishmentoflow-carbonindustriesandtransitionofeconomicdevelopmentpatternaresetforth.
简介:Thetemperatureis56.5°Cwhenacetonegasisrectifiedduringtheproductionofpowderyphospholipid.Ifheatexchangerisadded,heatenergythatisreclaimedcanbeusedbyotherheaters.Onthebasisofexchangehotwater(51°C)4m3everyminute,afactorywiththeproductivityofpowderyphospholipidbeing10tonadaycansave533.2tonstandardcoalwhichisequivalentto746.48toncommoncoal.Ifthistechniqueofsavingenergyandreducingemissioncouldbewidelyusedincorrelativeindustriesofalloverthecountry,economicbenefitswillbeprominent.
简介:Chinahaswitnessedrapideconomicdevelopmentsince1978,andduringthetime,energyproductionandconsumptiondevelopedatatremendousspeedaswell.EnergyefficiencywhichcanbemeasuredbyenergyconsumptionperunitofGDP,however,experiencedcontinuousdecrease.Theoretically,thechangeofenergyefficiencycanbeattributedtoindustrystructuralchangeandtechnologicalchange.InordertoexplainthetransformationofChineseenergyefficiency,weadoptlogarithmicmeanDivisiaindextechniquestodecomposechangesinenergyintensityintheperiodof1994-2005.Wefindthattechnologicalchangeisthedominantcontributorinthedeclineofenergyintensity,butthecontributionhasdeclinedsince2001.Thechangeinindustrystructurehasdecreasedtheenergyintensitybefore1998,butraisedtheintensityafter1998.Decomposedtechnologicaleffectsforallsectorsindicatethattechnologicalprogressesinhighenergyconsumingindustriessuchasrawchemicalmaterialsandchemicalproducts,smeltingandpressingofferrousmetals,manufactureofnon-metallicmineralproductsandhouseholdcontributearetheprincipaldriversofChina'sdecliningenergyintensity.
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.
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.
简介:Asglobalenergydemandscontinueincreasing,theconstantimprovementofenergyefficiencyhasbeenaconsensusintheworldwideandreceivedmoreandmoreattentionfromnotonlythetechnicalbutalsothesociological,economic,andpoliticalsectors.Energyefficienttechnologieshavebeennotonlytransformingthewaythatenergyisproduced,delivered,andconsumed,butalsochangingeveryaspectofourlifeandeventhefuture.1Toencourageresearcherstobecomeevenmore
简介:TheUnitedStatesisthemostdevelopedcountryintheworldandthenumberoneenergy-importingcountry.Chinaisthelargestdevelopingcountryandthenumbertwoenergy-importingcountry.TheenergyissueisthusakeyissueinSino-USRelations.TheUnitedStateshasbeenonbadtermswithsomeenergy-rich'problemcountries',whiletheenergycooperationbetweenChinaandthesecountriesisstartingtogowell.Sino-USrelationsnowaffectthewholeworld,andChina'sandtheUnitedStates'relationswiththesekeyenergyproducers—the'thirdpartyfactor'maybecomeamajorsourceofcompetitionandconflictbetweenthetwopowers.
简介:Interfacedislocationsmaydramaticallychangetheelectricproperties,suchaspolarization,ofthepiezoelectriccrystals.Inthispaper,westudythelinearinteractionsoftwointerfacedislocationloopswitharbitraryshapeingenerallyanisotropicpiezoelectricbi-crystals.Asimpleformulaforcalculatingtheinteractionenergyoftheinterfacedislocationloopsisderivedandgivenbyadoublelineintegralalongtwocloseddislocationcurves.Particularly,interactionsbetweentwostraightsegmentsoftheinterfacedislocationsaresolvedanalytically,whichcanbeappliedtoapproximateanycurvedloopsothatananalyticalsolutioncanbealsoachieved.Numericalresultsshowtheinfluenceofthebi-crystalinterfaceaswellasthematerialorientationontheinteractionofinterfacedislocationloops.
简介:Consideringtheadditionalelectricenergygeneratedafterthefulloperationoftheundergroundhydropowerstation,theelectricenergyaccommodationoftheThreeGorgesProject(TGP)isreviewed.Itisfocusedontheadditionalelectricityaccommodation,basedontheresearchattheearlystage.Theelectricenergyaccommodationsolutionsarerecommendedasthat,basedonthecost-benefitanalysisofthepowerdistributionarea,theadditionalelectricenergyoftheThreeGorgesshouldbegivenprioritytomeettheneedsatthesupplyendofHubeiandChongqing.TheresultsofthisresearchhasareferencevalueontheimplementationoftheThreeGorgeselectricpoweraccommodation,afterthefurtheroptimizationofthetransmissioncurvesinbothwetanddryseasons.