简介：TherearesomeadjustableparameterswhichdirecdyinfluencetheperformanceandstabilityofParticleSwarmOp-ttimizationalgorithm.Inthispaper,stabilitiesofPSOwithconstantparametersandtime-varyingparametersareanalyzedwithoutLipschitzconstraint.Necessaryandsufficientstabilityconditionsforaccelerationfactorψandinertiaweightwarepresented.Exper-imentsonbenchmarkfunctionsshowthegoodperfomanceofPSOsatisfyingthestabilitycondition,evenwithoutLipschitzcon-straint.Andtheinertiaweightwvalueisenhancedto(-1,1).

简介：Marineorganismsconstituteunlimitedresourceofbioactivesubstancesduetotheirhighbiodiversityandrepresentavaluablesourceofnewcompounds.Thisstudyoptimizedthealkali-extractionconditionsandantioxidantactivitiesofsolublepolysaccharidesfromthebodywallofSipunculusnudus.Theeffectsofsolid-liquidratio,extractionduration,extractiontemperature,andalkaliconcentrationontheyieldofS.nuduspolysaccharides(SNP)wereexamined,accordingtowhichtheoptimalcombinationofextractionparameterswasobtainedbyanorthogonaltest.TherelativeinfluencingimportanceofdifferentextractionparametersontheyieldofSNPfollowedtheorderassolid-liquidratio>extractiontemperature>alkaliconcentration>extractionduration.Thehighestextractionyield,1.98%,wasachievedunderanoptimalextractioncondition:temperature60℃,solid-liquidratio1:6gmL?1,duration5h,andalkali(NaOH)massfraction6%.TheinvitroantioxidantactivitiesexaminationshowedthatextractedSNPunderthisoptimizedconditionhadstrongpowerinreducingcertainhydroxylandsuperoxideradicalscavengingabilities.ThepromisingresultsshowedthatextractedSNPcouldbeapotentnaturalantioxidant.

简介：Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.

简介：调查控制网络优化设计与标准有关，例如精确，可靠性，敏感和费用，并且这些标准与对方仔细相关。为调查控制网络模拟优化设计的一个新方法被建议。这个方法基于观察价值的内部可靠性索引。为调查控制网络优化图案，分析方法和模拟方法有二个方法，并且两个都随广阔计算取决于计算程序。

简介：

简介：

简介：

简介：Asequentialstatisticalapproachwasappliedtooptimizingthefermentationmediumofepothilones(Epos)productionbymeansofamutantwhichwasobtainedbytreatingpolyangiumcellulosumATCC15384withnitriteandultraviolet.Theeffectsofdifferentcarbonsourcesandnitrogensourcesonthefermentationmediumweretested,andthesuitableoneswereselected.Thenauniformdesignwasemployedtodesigntheexperiments.Alinearmodelwasdevelopedforidentifyingthesignificantcomponentsinfermentationmedium,whileathirddegreepolynomialmodelwasusedforstudyingtherelationshipbetweentheconcentrationofthecomponentsinfermentationmediumandtheyieldofEpos(YEPs).Apatternsearchmethodwasusedforsearchingtheoptimumfermentationmediuminthetestspace,whichwasasfollows(g/L):potassiumnitrate8.00,soybeanpeptone17.60,potassiumhydrogenphosphate1.00,beefextraction6.46,yeastextraction1.00,calciumchloride0.25,sodiumchloride1.00andferricchloride0.02.TheoptimumfermentationmediumwasexpectedtoresultinayieldofEpos(YEPs)of2.48mg/L.ThevalidationexperimentswiththeoptimummediumwereperformedintriplicateandtheaverageyieldofEposwas2.45mg/Lwhichwas7.78timeshigherthanthatofEpospreparedwithoutoptimization.

简介：Inordertoovercomethedifficultiescausedbysingularoptima,inthepresentpaper,anewmethodforthesolutionsofstructuraltopologyoptimizationproblemsisproposed.Thedistinctivefeatureofthismethodisthatinsteadofsolv-ingtheoriginaloptimizationproblemdirectly,weturntoseekingthesolutionsofasequenceofapproximatedproblemswhichareformulatedbyrelaxingtheconstraintsoftheoriginalproblemtosomeextent.Theapproximatedproblemcanbesolvedefficientlybyemployingthealgorithmsdevelopedforsizingoptimizationproblemsbecauseitssolutionisnotsingular.Itcanalsobeprovedthatwhentherelaxationparameteristendingtozero,thesolutionoftheapproximatedproblemwillconvergetothesolutionoftheoriginalproblemuniformly.Numericalexamplesillustratetheeffectivenessandvalidityofthepresentapproach.Resultsarealsocomparedwiththoseobtainedbytraditionalmethods.

简介：

简介：Thispaperconsiderstheoptimaltrafficsignalsettingforanurbanarterialroad.Byintroducingtheconceptsofsynchronizationrateandnon-synchronizationdegree,amathematicalmodelisconstructedandanoptimizationproblemisposed.Then,anewiterativealgorithmisdevelopedtosolvethisoptimaltrafficcontrolsignalsettingproblem.Convergencepropertiesforthisiterativealgorithmareestablished.Finally,anumericalexampleissolvedtoillustratetheeffectivenessofthemethod.

简介：1.IntroductionLetXbeavectorspace,Ybeatopologicalvectorspace,Zbealocallyconvexspace,andletthetopologicaldualspacesofYandZbedenotedbyY*andZ*,respectively.LetCbeapointedconvexconeinYandKbeaclosedconvexpointedconeinZ.ThedualconesofCandKaredefinedasrespec...

简介：InordertoobtaincreditabledataanapplicablemethodtooptimizeparametersoftheLangmuirprobesandcircuitsinastationarylaboratorydeviceisinvestigatedandanexperimentalcriterionoftheprobedimensionisdeveloped.ToobtaintheelectrontemperatureanddensitytheElectronEnergyDistributionFunction(EEDF)approachwithlesscomputingtimeandmoreaccurateresultsisapplied,insteadoftheconventionalslopeapproach.Moreovertheinfluenceofthevesselwallmaterialsontheplasmadensityisdiscussedbriefly,indicatingthatthedielectricwallishelpfultoenhancingtheelectrondensity.

简介：Wepresentasemi-customdesignmethodologybasedontransistortuningtooptimizethedesignperformance.Comparedwithothertransistortuningapproaches,ourtuningprocesstakesthecross-talkeffectintoaccountandprominentlyreducesthecomplexityforcircuitsimulationandanalysisbydecomposingthecircuitnetworkutilizinggraphtheory.Furthermore,theincrementalplacementandroutingforthecorrespondingtransistortuninginconventionalapproachesisnotrequiredinourmethodology,whichmightinducetiminggraphvariationandadditionaliterationsfordesignconvergence.Thismethodologycombinestheflexibleautomatedcircuittuningandphysicaldesigntoolstoprovidemoreopportunitiesfordesignoptimizationthroughoutthedesigncycle.

简介：Inthispaper,anewgloballyconvergentalgorithmfornonlinearoptimizationproblemswithequalityandinequalityconstraintsispresented.ThenewalgorithmisofSQPtypewhichdeterminesasearchdirectionbysolvingaquadraticprogrammingsubproblemperiteration.Somerevisionsonthequadraticprogrammingsubproblemhavebeenmadeinsuchawaythattheassociatedconstraintregionisnonemptyforeachpointxgeneratedbythealgorithm,i.e.,thesubproblemsalwayshaveoptimalsolutions.Thenewalgorithmhastwoimportantproperties.Thecomputationofrevisionparameterforguaranteeingtheconsistencyofquadraticsubproblemandthecomputationofthesecondordercorrectionstepforsuperlinearconvergenceusethesameinverseofamatrixperiteration,sothecomputationamountofthenewalgorithmwillnotbeincreasedmuchmorethanotherSQPtypealgorithms;Anotheristhatthenewalgorithmcangiveautomaticallyafeasiblepointasastartingpointforthequadraticsubproblemsperiteration,thiswillobivouslysimplifythecomputationprocedureofthesubproblems.Somenumericalresultsarereported.

简介：一个新二水平的subspace方法为从无限维的优化问题解决一般非强迫的最小化明确的表达discretized被建议。在每次重复，算法也在当前的水平或粗糙的subspace修正步上执行直接的步。在粗糙的subspace修正步，我们由并列方向和坡度方向在当前的点跨越的二维的subspace扩充传统的粗糙的格子空间。全球集中被证明，集中率在discretized功能上在一些温和条件下面被学习。一些变化问题的初步的数字实验证明我们的二水平的subspace方法是有希望的。

简介：BasedonthecharacteristicsofferriticSUS430heatinganddeformation,andcombinedwiththefeaturesofthe1780mmhot-rollingmill,aroughingmodelwasintroducedintwoaspects:optimizingtheroughrollingpassesandimprovingthewidthcontrolprecision.Throughreducingtheroughrollingpasses,theroughrollingtimecanbeshortened,theprecisionrollingstartuptemperaturecanberaisedandtheyieldofthehot-rolledproductscanbeincreased.Moreover,onthepremisethattheslabwidthfluctuationwasgreat,theprecisionofthewidthcontrolcanbeimprovedthroughoptimizingtheparametersofthehot-rollingwidthcontrolmodel.Theresultshowsthattheoptimizationandperfectionoftheoriginalrollingprocessofthestainlesssteel430seriesfurtherimproveditscapacityandproductquality.

简介：Qilu石油化学的同伴以便同步催化剂在的代替起来流动反应堆(UFR)和改正床反应堆并且完成对待联合起来的水疗院修理了的残余的1.5年的操作周期分级的UFR和优化催化剂。商业操作结果表明了为在分级优化以后对待的残余水疗院的催化剂的系列与水疗院的质量完成了1.5年的一个操作周期为FCC满足要求的对待的油产品化工物品。

简介：Amethodologyisimplementedtofindtheoptimumreducedweightconfigurationdesignofanoperatingstructureofacivilaircraftverticaltailfin.FE(finiteelement)basedtopologyoptimizationisexecutedtofindtheoptimummaterialdistributionofinitialdesignspaceofribbymaximizingthestiffness.Loadspertinenttotheoperatingandgroundconditionsareestimatedandapplied,consideringtheorientationofstructuralassemblymembersandbuilt-insupportsofferedinthemainstructure.Manufacturingconstraintsareincorporatedintotheoptimizationlooptogeneratepragmaticandmanufacturabledesignconfiguration.ThetopologicallyoptimizedconfigurationisthenconvertedtoCADviabledesignthroughdatareductionandsmoothingbyconvertingtoISO-surfaces.Amethodologyisalsodevisedtomodifythetopologicaloptimizedvoidsandmateriallayoutpreciselywithsplinesandfilletstoconstructmanufacturablefeaturesandavoidstressconcentrations.Theresultingnoveldesignproposalisthenanalyzedandvalidatedagainststipulatedloads,constraintsandotherdesignneeds.Resultsvalidatethenewdesignproposalasmorereliable,havingreducedweightandenhancedstructuralperformance.

简介：