简介：Recentlythetroublesrelatedtothenetworksecurityhaveoftenoccurredattacks.Itconsistsoftwofundamentalthinge;themonitoringandtheaccesscontrol.Tomonitorthenetwork,wehaveinstalledtheintrusiondetectioinsystemandhavemanageditsince1998,Forthesecondthing,wearrangedthreecategoriestoclassifyallhosts(about5000hosts)atKEKaccordingtotheirsecuritylevel.Torealizethesethreecategories,wefiltertheincomingpacketfromoutsideKEKwhetherithasaSYNflagornot.Thenetworkmonitoringandtheaccesscontrolproducedgoodeffectsinkeepingoursecuritylevelhigh.Since2000wehavestartedthetransitonofLANfromshared-medianetworktoswitchednetwork.NowalmostpartofLANwasre-configuredandinthisnewLAN10Mbps/100Mbps/1GbpsEthernetaresupported.Currentlyweareplanningfurtherspeedup(10Gbps)andredundancyofnetwork.NotonlyLANbutalsoWAN,networkspeedwillbeupgradedto10GbpsthankstothestrongpromotionofITbyJapanesegovernment,Inthisveryhighspeednetwork,ourcurrentstrategywillbeaffectedandagainthenetworksecuritybecomesabigissue,Thispaperdescribesourexperiencesinpracticeofthecurrentstrategyandmanagementknow-howtogetherwiththediscussiononthenewstrategy.

简介：Astrategyforthesynthesisofpolymer-protectivebimetallicsolsisproposedwhichhastheadvantageofthestrongprotectiveeffectofthepolymeragentononeofthecompositestostabilizethebimetalliccolloidalparticles.Thisstrategyiscertifiedtobeusefultothepredicationoftheformationofstablebimetalliccolloidsprotectedbypolymerandtothecontroloftheparticlesizetoacertainextent.AseriesofnewPVP-protectivebimetalliccolloidaldispersionscontainingnoblemetalelement(Pt,Rh,Pd),lighttransitionmetalelement(Co,Fe),andboronareobtainedfromthecorrespondingsaltsbythemethodsofreductionbystageandcoreduction,usingtheNaBH4asreductant.TheTEM,XRDandEPMAmeasurementsindicatetheformationofbimetalliccolloids.AninterestingkindofcoilaggregationisobservedinthesystemsofPVP-Pt-CoandPVP-Rh-Copreparedbythemethodofreductionbystage.

简介：Thispaperconsidersaclassofdelayedrenewalriskprocesseswithathresholddividendstrategy.ThemainresultisanexpressionoftheGerber-ShiuexpecteddiscountedpenaltyfunctioninthedelayedrenewalriskmodelintermsofthecorrespondingGerber-Shiufunctionintheordinaryrenewalmodel.Subsequently,thisrelationshipisconsideredinmoredetailinboththestationaryrenewalriskmodelandtheruinprobability.

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简介：Spacecraftsinperiodicorquasi-periodicorbitsnearthecollinearlibrationpointsareprovedtobeexcellentplatformsforscientificinvestigationsofvariousphenomena.Sincesuchperiodicorquasi-periodicorbitsareexponentiallyunstable,thestation-keepingmaneuverisneeded.Astation-keepingstrategywhichisfoundbyananalyticalmethodispresentedtoeradicatethedominantunstablecomponentofthelibrationpointtrajectories.Theinhibitforcetransformstheunstablecomponenttoastable...

简介：Anewstochasticoptimalcontrolstrategyforrandomlyexcitedquasi-integrableHamiltoniansystemsusingmagneto-theological(MR)dampersisproposed.ThedynamicbehaviorofanMRdamperischaracterizedbytheBouc-Wenhystereticmodel.ThecontrolforceproducedbytheMRdamperisseparatedintoapassivepartincorporatedintheuncontrolledsystemandasemi-activeparttobedetermined.ThesystemcombiningtheBouc-Wenhystereticforceisconvertedintoanequivalentnon-hystereticnonlinearstochasticcontrolsystem.ThenItostochasticdifferentialequationsarederivedfromtheequivalentsystembyusingthestochasticaveragingmethod.Adynamicalprogrammingequationforthecontrolleddiffusionprocessesisestablishedbasedonthestochasticdynamicalprogrammingprinciple.Thenon-clippingnonlinearoptimalcontrollawisobtainedforacertainperformanceindexbyminimizingthedynamicalprogrammingequation.Finally,anexampleisgiventoillustratetheapplicationandeffectivenessoftheproposedcontrolstrategy.

简介：Inthispaper,anonlineardynamicMIMOmodelofa6-DOFunderactuatedquadrotorrotorcraftisderivedbasedonNewton-Eulerformalism.Thederivationcomprisesdeterminingequationsofmotionofthequadrotorinthreedimensionsandseekingtoapproximatetheactuationforcesthroughmodelingoftheaerodynamiccoefficientsandelectricmotordynamics.Thederivedmodelisdynamicallyunstable,soasequentialnonlinearcontrolstrategyisimplementedforthequadrotor.Thecontrolstrategyincludesexactfeedbacklinearizationtechnique,usingthegeometricmethodsofnonlinearcontrol.Theperformanceofthenonlinearcontrolalgorithmisevaluatedusingsimulationandtheresultsshowtheeffectivenessoftheproposedcontrolstrategyforthequadrotorrotorcraftnearquasi-stationaryflight.

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简介：Inthethree-phasetrafficflowstudies,thetrafficflowcharacteristicatthebottlenecksectionisahotspotintheacademicfield.Thecontroversyaboutthecharacteristicsofthesynchronizedflowatbottleneckisalsothemaincontradictionbetweenthethree-phasetrafficflowtheoryandthetraditionaltrafficflowtheory.Undertheframeworkofthree-phasetrafficflowtheory,thispapertakestheon-rampasanexampletodiscussthetrafficflowcharacteristicsatthebottlenecksection.Inparticular,thispapermainlyconductsthemicro-analysistotheeffectoflanechangeunderthetwolaneconditions,aswellastheeffectoftheon-ramponthemainlinetrafficflow.Itisfoundthatwhenthemainroadflowislow,thegreatertheon-rampinflowrate,thehighertheaveragespeedofthewholeroadsection.Astheprobabilityofvehiclesenteringfromtheon-rampincreases,theflowandtheaveragespeedofthemainroadaregraduallystabilized,andthentheon-rampinflowvehiclesnolongerhaveasignificantimpactonthetrafficflow.Inaddition,thispaperfocusesonthevelocitydisturbancegeneratedattheon-ramp,andproposesthecorrespondingon-rampcontrolstrategybasedonit,andthesimulationverifiedthatthecontrolstrategycanreasonablycontrolthetrafficflowbytheon-ramp,whichcanmeetthecontrolstrategyrequirementstosomeextent.

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简介：有双性人目标策略的一个扩充Lagrangian信任区域方法被建议因为解决非线性的平等抑制了优化，它在惩罚类型方法和没有惩罚的之间掉落。在每次重复，试用步被在一个信任区域以内最小化一个二次的近似模型到扩充Lagrangian功能计算。模型是为非强迫的优化的标准信任区域subproblem并且能被许多存在方法高效地因此解决。选择惩罚参数，辅助信任区域subproblem与限制违背有关被介绍。结果，惩罚参数不必monotonically正在增加并且不趋于到无穷。双性人目标策略，与客观功能和限制违背的措施有关，被利用决定试用步是否将被接受。方法的全球集中在温和假设下面被建立。数字实验被做，它在各种各样的困难的状况上说明算法的效率。

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简介：OptimalexploitationofhadronicfinalstatesplayedakeyroleinsuccessesofallrecenthadroncolliderexperimentinHEP,andtheabilitytousehadronicfinalstateswillcontinuetobeoneofthedecisiveissuesduringtheanalysisphaseoftheLHCexperinentsMonteCarloimplementationsofhadronicshowermodelsprovidedwithGEANT4facilitatetheuseofhadronicfinalstates,andhavebeendevelopedformanyyears.Wewillgiveanoverviewonthephysicsunderlyinghadronicshowersimulation,discussingthethreebasictypesofmodelling;datadriven,parametrisationdriven,andtheorydrivenmodelling,andtheirrespectiveimplementationstatusinGEANT4.Wewillconfrontthedifferenttypesofmodellingwithavalidationsuiteforhadronicgeneratorsbasedoncross-sectionsmeasurementsfromthintargetexperiments,andexposethestrengthandweaknessesoftheindividualapproaches.

简介：Possibilitiesforenhancementofcatalyticreactionratebycombiningphasetransfercatalysisandhydrogenbondingofthecatalystwiththesubstrateandreagentwerestudied.Aphasetransfercatalystlibrarywithsixtypolystyrene-supportedquaternaryammoniumsaltcatalystswassynthesized.ThereductionofacetophenonebyNaBH4wasusedastheprobingreactiontoselectouttheostactivecatalystinthelibrarybyusingiterativemethod.whichwasthegel-typetriethanolamineaminsatingstronglyasicanionexchangeresinwiththecrosslinkingdegereeof2%Ahydrogenbondingassistedcatalyticmechanismwasproposedtoexplainthehighcatalyticactivityofthecatalyst.

简介：Inrealmultiple-inputmultiple-output(MIMO)systems,theperfectchannelstateinformation(CSI)maybecostlyorimpossibletoacquire.Butthechannelstatisticalinformationcanbeconsideredrelativelystationaryduringlong-termtransmission.Thestatisticalinformationcanbeobtainedatthereceiverandfedbacktothetransmitteranddonotrequirefrequentupdate.Byexploitingchannelmeanandcovarianceinformationatthetransmittersimultaneously,thispaperinvestigatestheoptimaltrans-missionstrategyforspatiallycorrelatedMIMOchannels.Anupperboundofergodiccapacityisderivedandtakenastheper-formancecriterion.Simulationresultsarealsogiventoshowtheperformanceimprovementoftheoptimaltransmissionstrategy.

简介：察觉到途径的nearfield错误，是在活跃声学的结构的实现遇到的关键问题之一，理论上被调查。基本想法包含一小部分PVDF电影对到为测量总数的主要面板和第二等的面板的表面的boned被散发健全力量。首先，在这份报纸，与活跃声学的结构联系的一个理论模型被建立。第二，为PVDF对的形状系数的公式基于察觉到的模式和PVDF建模的声学的放射被导出。最后，很多计算机模拟被执行，在散发的健全电源的PVDF对和相应减小的形状是结果表明的calculated.The察觉到的建议nearfield错误的可行性策略。

简介：Thegoalsofthispaperaretwofold:wedescribecommonfeaturesindatasetsfrommotorvehicleinsurancecompaniesandweinvestigateageneralstrategywhichexploitstheknowledgeofsuchfeatusres.Theresultsofthestrategyareabasistodevelopinsurancetariffs.Weuseanonparametricapproachbasedonacombinationofkernellogisticregressionandε-supportvectorregressionwhichbothhavegoodrobustnessproperties.Thestrategyisappliedtoadatasetfrommotorvehicleinsurancecompanies.

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简介：Thispaperconsidersaperturbedrenewalriskprocessinwhichtheinter-claimtimeshaveaphase-typedistributionunderathresholddividendstrategy.Integro-differentialequationswithcertainboundaryconditionsforthemoment-generatingfunctionandthemthmomentofthepresentvalueofalldividendsuntilruinarederived.Explicitexpressionsfortheexpectationofthepresentvalueofalldividendsuntilruinareobtainedwhentheclaimamountdistributionisfromtherationalfamily.Finally,wepresentanexample.