简介：

简介：

简介：Acertainnumberofconsiderationsshouldbetakenintoaccountinthedynamiccontrolofrobotmanipulatorsashighlycomplexnon-linearsystems.Inthisarticle,weprovideadetailedpresentationofthemechanicalandelectricalimpli-cationsofrobotsequippedwithDCmotoractuators.Thismodeltakesintoaccountallnon-linearaspectsofthesystem.Then,wedevelopcomputationalalgorithmsforoptimalcontrolbasedondynamicprogramming.Therobot’strajectorymustbepredefined,butperformancecriteriaandconstraintsapplyingtothesystemarenotlimitedandwemayadaptthemfreelytotherobotandthetaskbeingstudied.Asanexample,amanipulatorarmwith3degreesoffreedomisanalyzed.

简介：

简介：

简介：Adistributedcontrolsystemisdesignedforplasmasprayingequipmentandtheconfigurationsofsystemsoftwareandhardwareisdiscussed.Throughfoundinganexpertdatabase,thesprayingprocessparametersareworkedoutandtheinitializationandcontrolofsprayingprocessarerealized.Theplasmasprayingsystemwiththiscontrolconfigurationcansimplifythesprayingoperation,improveautomationlevelofsprayprocess,andapproachtheexperiencecriterionassoonaspossible.

简介：

简介：

简介：

简介：ChemicalfluxesofAsianriversintooceansbeardifferentregionalvariations.Threezonesarecharacteristicofdistinctdissolvedsedimentloadsandyieldsandionicconcentration.RiversintooceansinChinaplayanimportantroleinAsiabecauseoftheirdifferentchemicalfluxes,amongwhichthosedrainingtheLoessPlateauhavehighionicconcentration,lowwaterdischargesanddissolvedsedimentloadsandyields.Climate,vegetation,soilandstratalithology,chemicalweatheringintensityandtectonicactivitydominatechemicalfluxesofAsianriversintooceans,anddifferentfactorshavedifferenteffectsonthechemicalfluxesofseparateregionalrivers.RisingoftheTibetPlateaualsoexertsanimportantinfluenceonchemicalcompositionsofriversoriginatingfromit.

简介：

简介：Theattitudecontrolsystemdesignanditscontroleffectareaffectedconsiderablybythemass-propertyparametersofthespacecraft.Inthemissionofon-orbitservicing,asfuelisexpended,orthepayloadsareaddedorremoved,thecenterofmasswillbechangedincertainaxe;consequently,somethrusters’directionsaredeviatedfromthecenterofmass(CM)incertainplane.TheCMofassembledspacecraftestimationandthrusterdirectioncontrolarestudied.Firstly,theattitudedynamicsoftheassembledspacecraftisestablishedbasedontheNewton-Eulermethod.Secondly,theestimationcanbeidentifiedbytheleastrecursivesquaresalgorithm.Then,aschemetocontrolthethrusters’directionsisproposed.Byusingthegimbalinstalledattheendoftheboom,theangleofthethrusteriscontrolledbydrivingthegimbal;therefore,thrusterscanbedirectedtotheCMagain.Finally,numericalsimulationsareusedtoverifythisscheme.Resultsofthenumericalsimulationsclearlyshowthatthiscontrolschemeisrationalandfeasible.

简介：ＭａｊｏｒＦａｃｔｏｒｓＣｏｎｔｒｏｌｌｉｎｇＣａｌｃｉｔｅＤｉｓｓｏｌｕｔｉｏｎｉｎＨｙｄｒｏｔｈｅｒｍａｌＫａｒｓｔＳｙｓｔｅｍｓＷａｎｇＹａｎｘｉｎ；ＴａｎｇＺｈｏｎｇｈｕａ（ＦａｃｕｌｔｙｏｆＥｎｖｉｒｏｎｍｅｎｔａｌＳｃｉｅｎｃｅａｎｄＧｅ...

简介：作为为量状态转移匹配状况(SPMC)的光谱同等值的示范，我们在限制外部正切磁场经分解并且数字地在Heisenbergchain调查单个磁量子的状态的繁殖。它证明起始的Gaussian波浪包能在对应物地点接近完美地被检索在上更距离如果系统的分散关系近似遇见SPMC。

简介：

简介：ＣｈａｒａｃｔｅｒｉｓｔｉｃｓａｎｄＣｏｎｔｒｏｌｉｎｇｏｆＬａＢ６ＺｒＢ２ＥｕｔｅｃｔｉｃＭｉｃｒｏｓｔｒｕｃｔｕｒｅＣｈｅｎＣｈａｎｇｍｉｎｇ（陈昌明），ＺｈｏｕＷａｎｃｈｅｎｇ（周万城），ＺｈａｎｇＬｉｔｏｎｇ（张立同）（ＮａｔｉｏｎａｌＫｅ...

简介：Thesynthesisofultrafineceriumdioxideprecursorviahomogeneousprecipitationwasstudied.Mixedaqueoussolutionofanhydrousceriumnitrateandureawasfirstheatedto85℃for2h,andthepreparedsuspensionwasthenagedatroomtemperatureforvariousperiodsoftime.Whiteprecipitatewasfinallycollectedbycentrifugingandwashedwithdistilledwaterandanhydrousethanol.Theobtainedceriumdioxide(CeO2)precursorwasobservedwithSEM.Itwasfoundthatthemorphologyandsizeoftheprecursorwerestronglyaffectedbyagingtimeandstirringconditions(withorwithoutstirring).Theprecipitatedfinesphericalparticlesoftheprecursorchangedtheirshapefromellipsetosliceordirectlytoslice.Finesphericalmonodispersed(300nm)precursorpowderscouldbeobtainedbycontrollingtheagingtime.Stirringthesolutionalsocouldchangethereactionprocessandthusthemorphologyandsizeoftheprecursorwerechanged.

简介：

简介：

简介：我们介绍预兆的控制理论进混乱控制的学习并且求婚一。指导基于一个神经网络模型优化预兆的控制算法。Theproposed控制系统在一个未知混乱系统稳定混乱运动到需要的目标轨道上。与存在相比类似的算法，建议控制系统有更快的反应，它因此为混乱系统的稳定要求短得多的时间。Theproposed途径能控制亢奋的混乱，算法简单。控制算法和控制系统的稳定性的集中能被保证。理论上的分析和模拟表明算法的有效性。