简介:WepresentthefirststepsofadesignoftheoptimalparametersforafullBraggX-Rayfreeelectronlaser(BX-FEL).AimingtowardsafuturesourceofcoherentX-rayradiation,operatinginthestrongComptonregime,weenvisagethesystemtobetheseedforanadvancedlightsourceorcompactmedicalX-raysource.Herewefocusonthedesignoftheacceleratorparameters:maximumgradient,optimalacceleratedcharge,maximumefficiency,and‘wakecoefficient’,whichrelatestothedeceleratingelectricfieldgeneratedduetothemotionofacharged-lineortrainofcharged-lines.Specifically,wedemonstratethatthemaximumefficiencyhasoptimalvalueandgiventhefluenceofthematerials,themaximumacceleratedchargeinthetrainisconstant.Thesetworesultsmightbeimportantinanyfuturedesign.
简介:Globalstrengthisasignificantitemforfloatingproductionstorageandoffloading(FPSO)design,andsteelweightplaysanimportantroleinthebuildingcostsofFPSO.Itisthemaintasktoconsiderandcombinethesetwoaspectsbyoptimizinghulldimensions.Therearemanyoptionalmethodsfortheglobalstrengthanalysis.AcommonmethodistousetheABSFPSOEaglesoftwaretoanalyzetheglobalstrengthincludingtherulecheckanddirectstrengthanalysis.AndthesamemethodcanbeadoptedfortheFPSOhulloptimizationbychangingthedepth.Aftercalculationandoptimization,theresultsarecomparedandanalyzed.Theresultscanbeusedasareferenceforthefuturedesignorquotationpurpose.
简介:Experimentshaveshownthattheionenergyobtainedbylaser–ionaccelerationcanbeoptimizedbychoosingeithertheappropriatepulsedurationortheappropriatetargetthickness.WedemonstratethatthisbehaviorcanbedescribedeitherbythetargetnormalsheathaccelerationmodelofSchreiberetal.orbytheradiationpressureaccelerationmodelofBulanovandcoworkers.Thestartingpointofourconsiderationsisthattheessentialpropertyofalasersystemforionaccelerationisitspulseenergyandnotitsintensity.Maybesurprisinglyweshowthathigherionenergiescanbereachedwithreducedintensities.
简介:Membranealgorithms(MAs),whichinheritfromPsystems,constituteanewparallelanddistributeframeworkforapproximatecomputation.Inthepaper,amembranealgorithmisproposedwiththeimprovementthattheinvolvedparameterscanbeadaptivelychosen.Inthealgorithm,somemembranescanevolvedynamicallyduringthecomputingprocesstospecifythevaluesoftherequestedparameters.Thenewalgorithmistestedonawell-knowncombinatorialoptimizationproblem,thetravellingsalesmanproblem.Theempiricalevidencesuggeststhattheproposedapproachisefficientandreliablewhendealingwith11benchmarkinstances,particularlyobtainingthebestoftheknownsolutionsineightinstances.Comparedwiththegeneticalgorithm,simulatedannealingalgorithm,neuralnetworkandafine-tunednon-adaptivemembranealgorithm,ouralgorithmperformsbetterthanthem.Inpractice,todesigntheairlinenetworkthatminimizethetotalroutingcostontheCABdatawithtwenty-fiveUScities,wecanquicklyobtainhighqualitysolutionsusingouralgorithm.
简介:Calculatingthemineralcompositionisacriticaltaskinloginterpretation.Elementalcapturespectroscopy(ECS)logprovidestheweightpercentagesoftwelvecommonelements,whichlaysthefoundationfortheaccuratecalculationofmineralcompositions.Previousprocessingmethodscalculatedtheformationcompositionviatheconversionrelationbetweentheformationchemistryandminerals.Thus,theirapplicabilityislimitedandthemethodprecisionisrelativelylow.Inthisstudy,wepresentamultimineraloptimizationprocessingmethodbasedontheECSlog.WederivedtheECSresponseequationsforcalculatingtheformationcomposition,then,determinedtheloggingresponsevaluesfortheelementsofcommonmineralsusingcoredataandtheoreticalcalculations.Finally,asoftwaremodulewasdeveloped.Theresultsofthenewmethodareconsistentwithcoredataandthemeanabsoluteerrorislessthan10%.
简介:在这份报纸,混合自动优化策略为设计被建议在水下机器人线。Isight作为一个集成平台被介绍。这个平台的构造包括UG6.0,GAMBIT2.4.6和FLUENT12.0基于用户编程和几个商业软件。一个聪明的参数优化方法,粒子群优化,被合并到平台。为了验证策略,求婚了,模拟被进行在上在水下机器人为5470建模,它从DTRCSUBOFF工程发源。与自动优化平台,最小的抵抗作为优化目标被拿;是的湿表面区域限制条件;象设计变量的船身前半部,最大的身体半径和船体后部最小半径的长度。随CFD计算,RANS方程和标准骚乱模型被用于直接数字的模拟。由模拟结果的分析,平台效率高,这被结束。通过平台,为线的设计的许多计划被产生,最佳的解决方案被完成。聪明的优化算法和数字模拟的联合保证一个全球最佳的答案并且改进寻找的答案的效率。
简介:ThispaperdealswithHeniggloballyefficiencyinvectoroptimizationinvolvinggeneralizedcone-preinvexset-valuedmapping.Somepropertiesofgeneralizedcone-preinvexset-valuedmaparederived.ItalsodisclosetheclosedrelationshipsbetweenHeniggloballyefficiencyofgeneralizedconepreinvexset-valuedoptimizationproblemandHeniggloballyefficiencyofakindofvectorvariationalinequality.
简介:Awayofresolvingspreadingcodemismatchesinblindmultiuserdetectionwithaparticleswarmoptimization(PSO)approachisproposed.IthasbeenshownthatthePSOalgorithmincorporatingthelinearsystemofthedecorrelatingdetector,whichistermedasdecorrelatingPSO(DPSO),cansignificantlyimprovethebiterrorrate(BER)andthesystemcapacity.Asthecodemismatchoccurs,theoutputBERperformanceisvulnerabletodegradationforDPSO.Withablinddecorrelatingscheme,theproposedblindDPSO(BDPSO)offersmorerobustcapabilitiesoverexistingDPSOundercodemismatchscenarios.
简介:Aimingtoreducethecomputationalcostsandconvergetoglobaloptimum,anovelmethodisproposedtosolvetheoptimizationofacostfunctionintheestimationofdirectionofarrival(DOA).Inthismethod,ageneticalgorithm(GA)andfuzzydiscreteparticleswarmoptimization(FDPSO)areappliedtooptimizethedirectionofarrivalandpowerparametersofthemodesimultaneously.Firstly,theGAalgorithmisappliedtomakethesolutionfallintotheglobalsearching.Secondly,theFDPSOmethodisutilizedtonarrowdownthesearchfield.InFDPSO,achaoticfactorandacrossovermethodareaddedtospeeduptheconvergence.Thisapproachhasbeendemonstratedthroughsomecomputationalsimulations.ItisshownthattheproposedalgorithmcanestimateboththeDOAandthepowersaccurately.Itismoreefficientthansomepresentmethods,suchastheNewton-likealgorithm,Akaikeinformationcritical(AIC),particleswarmoptimization(PSO),andgeneticalgorithmwithparticleswarmoptimization(GA-PSO).
简介:Thispaperstudiesafamilyofthelocalconvergenceoftheimprovedsecantmethodsforsolvingthenonlinearequalityconstrainedoptimizationsubjecttoboundsonvariables.TheHessianoftheLagrangianisapproximatedusingtheDFPortheBFGSsecantupdates.Theimprovedsecantmethodsareusedtogenerateasearchdirection.Combiningwithasuitablestepsize,eachiterateswitchestotrialstepofstrictinteriorfeasibility.WhentheHessianisonlypositivedefiniteinanaffinenullsubspace,oneshowsthatthealgorithmsgeneratethesequencesconvergingq-linearlyandtwo-stepq-superlinearly.Furthermore,undersomesuitableassumptions,somesequencesgeneratedbythealgorithmsconvergelocallyone-stepq-superlinearly.Finally,somenumericalresultsarepresentedtoillustratetheeffectivenessoftheproposedalgorithms.
简介:Inthisresearch,thedegradationofdibenzothiophene(DBT)wasinvestigatedbyusingPseudomonassp.LKY-5isolatedfromoilcontaminatedsoil.Theresponsesurfacemethodology(RSM)basedontheBox-Behnkendesign(BBD)wasappliedforevaluatingtheinteractiveeffectsoffourindependentvariablesincludingsubstrateconcentration,temperature,pHandagitationrateontheDBTremovalresponse.Atotalof29experimentsforfourfactorsatthreelevelswereconductedinpresentstudy.Asecond-orderregressionmodelwasthendeveloped,andtheanalysisofvariance(ANOVA)illustratedthattheproposedquadraticmodelcouldbeutilizedtonavigatethedesignspace.Thevalueofdeterminationcoefficient(R2=0.9534)indicatedasatisfactoryagreementbetweenthequadraticmodelandtheexperimentaldata.ItwasfoundthatDBTremovalwasmoresignificantlyaffected(P<0.0001)bysubstrateconcentrationcomparedwithotherthreeparameters.An100%degradationofDBTcouldbeobtainedbyPseudomonassp.LKY-5atasubstrateconcentrationof100mg/L.
简介:在复杂水流下面,管理海洋的电报的方程的运动复杂、非线性,并且电报配置和紧张的计算在一致或简单的水流下面与那些相比变得困难。获得数字结果,平常的Newton-Raphson重复经常被采用,但是它的稳定性取决于起始的猜测的答案到管理方程。改进数字计算的稳定性,建议的这份报纸分开了粒子群优化,变量在被分开成搜索空间的几个组,和尺寸被减少便于粒子群优化。经由分开的粒子群优化,这些管理非线性的方程能与任何起始的解决方案成功地被解决,并且数字计算的进程是很稳定的。为电报配置和在复杂水流下面的海洋的电报的紧张的计算,建议的分开的群粒子优化比另外的粒子群优化更有效。
简介:TooptimizethemagneticpropertiesofnanocompositeNd9Fe85B6magnets,theas-quenchedribbonswithdifferentmicrostructureswerepreparedatsixwheelvelocitiesfrom10to30ms-1throughrapidquenching,followedbyaseriesofannealingtreatmentsat550–800°Cfor5–10min.Itisfoundthatboththelargeinitialgrainsatlowcoolingrateandhighcontentofamorphousphaseathighcoolingratecausea-Fegrainscoarsening,whichleadstoadeclineinthestrengthofexchangecouplinginteractionandthedeteriorationofmagneticproperties.Inordertooptimizethemagneticproperties,theas-quenchedribbonsshouldbechosenwithrelativelysmallinitialgrainsaswellasasmallamountofamorphousphase.FornanocompositeNd9Fe85B6materials,theoptimizedmagneticpropertiesofHcj=446kAm-1,Br=0.86T,(BH)max=80kJm-3areobtainedforribbonspreparedat18ms-1afterannealingat620°Cfor5min.
简介:Inordertoestablisharoutesupportingmulti-constrainedqualityofservice(QoS),increasenetworkthroughputandreducenetworkenergyconsumption,animprovedantcolony-basedmulti-constrainedQoSenergy-savingroutingalgorithm(IAMQER)isproposed.Theantcolonyalgorithm,asoneoftheavailableheuristicalgorithms,isusedtofindtheoptimalroutefromsourcenodetodestinationnode.TheproposedIAMQERalgorithm,whichisbasedontheanalysisoflocalnodeinformationsuchasnodequeuelength,nodeforwardingnumberofdatapacketsandnoderesidualenergy,balancestherelationshipbetweenthenetworkthroughputandtheenergyconsumption,thusimprovingtheperformanceofnetworkinmulti-constrainedQoSrouting.SimulationresultsshowthatthisIAMQERalgorithmcanfindtheQoSroutethatreduceaverageenergyconsumptionandimprovesnetworkpacketdeliveryratioundertheend-to-enddelayandpacketlossratioconstraints.
简介:采用5水平Box-Behnken设计的反应表面方法论(RSM)被用来优化铈(III)的biosorption到动物和植物起源viz的biowaste材料上。对虾甲壳(PC)和玉米风格(CS)。各种各样的过程参数viz。pH(一:3.0–9.0),生物资源剂量(B:0.05–0.35g/L),起始的金属集中(C:50–350mg/L),接触时间(D:2–6h)并且温度(E:20–60°C)为优化被选择。木头转变被盒子艇长阴谋在现在的盒子中建议。低p值<0.0001验证了模型的意义。为PC的218.3mg/g和为CS的180.2mg/g的最大的Ce(III)举起在最佳条件下面被注意。在平衡等温线之中,Freundlich模型被发现是而兰米尔模型证明最好适合在CS上建议铈biosorption的同类的模式,在PC上建议biosorption的一个异构的模式的最好适合的那个。这被扫描电子显微镜学(SEM)进一步证实。运动研究显示出作为位于这个过程下面的现象建议physisorption的伪first顺序模型的更好的适用性。电影散开被博伊德阴谋的非线性建议。热力学的研究证明这个过程吸热、自发。FTIR分析在Ce(III)biosorption期间证实了酰胺,胺,酉同类和主要白酒组的参予的主要参与。EDAX分析在Ce(III)biosorption期间证实了碳组的主要参予。这是Ce(III)biosorption的参数优化上的第一份报告到用可能从水的环境对Ce(III)的恢复有用的5水平Box-Behnken试验性的设计的biowaste材料上。