简介：TheemergenceofB2Belectronicmarketshasgreatlychangedtherelativebargainingpowerofbuyersandsellers.Westudytheequilibriummarketstructureinabuyer’smarket.Wefindthatbuyer-controlledB2BmarketsandneutralB2Bmarketshavedifferentequilibriumstructures,andtheemergenceofB2Bmarketswillincreasesocialwelfare,butitseffectonbuyersandsellerswillbedifferent:B2Bmarketsincreasetheconsumersurplusoftheendmarket,buttheireffectsonbuyerandsellerprofitsaremoderatedbytherelativebargainingpowerofbuyersandsellers.TheprofitsofthesidewithmuchweakerbargainingpowerwilldecreaseduetotheintroductionofB2Bmarkets.

简介：摘要本文选取常规观测资料、自动站资料以及NCEP再分析资料等相关资料，对2016年7月2-4日如皋市暴雨天气成因进行分析。结果表明本次暴雨天气主要是由于副热带高压稳定少动、低涡东移和西南暖湿气流共同作用下产生的。本次暴雨天气的水汽输送通道主要是由副热带高压西侧所产生的偏南气流，持续将来自南海以及孟加拉湾海的水汽朝华东输送，同时在强降水落区上游构成很强的水汽辐合，为此次暴雨天气的发生发展提供了有利的水汽条件。低层辐合，高层辐散的抽吸作用对于上升运动的产生以及维持较为有利，为暴雨天气的发生发展给予了较好的动力条件。在本次暴雨天气过程中，K指数始终维超过35℃，大气呈现出特别不稳定的状态。SI指数的分布具有显著的日变化。如皋市呈现出“中高层干、低层湿”的形势，高温高湿的环境形成热力不稳定条件，促使暴雨天气的产生。

简介：

简介：Thispaperconstructedportfoliosaccordingtothegrowthratesandtheirstabilityoffirm'stotalstockholders'equitypershareandnetincomepershare,usingallthefirms'informationofShanghaiA-sharemarket.Wefoundthatthemarketexhibitssomeoverreactiontothegrowthraieoffirm'snetincomepershare,andisn'tsensitivetothestabilityoffirm'sgrowthrates.

简介：

简介：ThemainpurposeofthispaperistostudyaproblemrelatedtoGolomb'sconjectures,andgiveaninterestingasymptoticformula.

简介：

简介：ＡＮＥＦＦＩＣＩＮＴＩＭＰＬＥＭＥＮＴＡＴＩＯＮＯＦＭＥＲＲＩＬＬ＇ＳＭＥＴＨＯＤＹＡＮＧＢｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｎａｇｅｍｅｎｔＥｎｇｉｎｅｅｒｉｎｇＨａｒｂｉｎＥｎｇｉｎｅｅｒｉｎｇＵｎｉｖｅｒｓｉｔｙＨａｒｂｉｎ１５０００１）Ａｂ...

简介：Let■Ω=Γ=Γ1+Γ2（seeFig.1）,meas（Γ1）>0,V={v|v∈H1（Ω）,v|Γ1=0},andV0={ω|Δω=hinΩ,ω|Γ=0,（?）h∈V}.LetV0′=thedualspaceofV0,a（u,v）=∫Ω▽u·▽Δvdx,andF（v）=∫Ωfvdx+∫Γ2g1Δvds-∫Γg2（?）ds,f∈V′0,g1∈H-（1/2）（Γ2）,g2∈H-（3/2）（Γ）.Considerthevariationalproblem:findu∈Vsuchthata（u,v）=F（v）,（?）v∈V0.（1）UsingTartar’slemma,weprovethatforproblem（1）thereexistsauniqueu∈Vsatisfying■

简介：

简介：

简介：

简介：Inthiseraofadata-drivensociety,usefuldata(BigData)isoftenunintentionallyignoredduetolackofconvenienttoolsandexpensivesoftware.Forexample,weblogfilescanbeusedtoidentifyexplicitinformationofbrowsingpatternswhenusersaccesswebsites.Somehiddeninformation,however,cannotbedirectlyderivedfromthelogfiles.Wemayneedexternalresourcestodiscovermoreknowledgefrombrowsingpatterns.Thepurposeofthisstudyistoinvestigatetheapplicationofwebusageminingbasedonweblogfiles.Theoutcomeofthisstudysetsfurtherdirectionsofthisinvestigationonwhatandhowimplicitinformationembeddedinlogfilescanbeefficientlyandeffectivelyextracted.Furtherworkinvolvescombiningtheuseofsocialmediadatatoimprovebusinessdecisionquality.

简介：庇护重量枚举符，完全的重量在戒指R=F上为线性代码枚举符2+uF2+vF2被定义并且从R的灰色的地图n到F23n被构造。由证明灰色在R上自我双的代码想象的事实是在F上的自我双的代码2,并且基于为Hamming的MacWilliams身份，重量在F上线性代码枚举符2,MacWilliams为李重量的身份在R上线性代码枚举符被给。进一步由介绍特殊可变t，为完全的重量的MacWilliams身份在R上线性代码枚举符被获得。最后，说明二MacWilliams身份的正确性和功能的一个例子被提供。

简介：ＷＵ－ＲＩＴＴ＇ＳＭＥＴＨＯＤＦＯＲＮＯＮＬＩＮＥＡＲＣＯＮＴＲＯＬＳＹＳＴＥＭＳ￥ＬＩＳｈｕｒｏｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｔｈｉ...

简介：TheanalysisandevaluationofanactualportsystemcontainingRdifferentship’skindsandNsubsystemseachofwhichconsistsofM.(i=1,2,…,N)portsarederived.TheexternalarrivalsofshipstothesystemcomefromRdifferentPoissonsourcesandtheinterarrivalstothequeueofeachportofasubsystemaredeterminedaccordingtoconditionprobabilities.EachporthasmultipleberthswhoseservicetimesaredistributedaccordingtoErlangprobabilitydistributionfunctions.EachportofasubsystemhasRinfinitecapacitybuffersforstoringshipsinterarrived.Thismethodprovidesagoodapproximationprocedureforobtainingsystemperfor-mancemeasuressuchaswaitingtimesofships,averagequeuelengths,etc.Optimumportcapacitycanthusbeevaluatedbyusingthisanalysis.Asimulationisalsopresentedtotestthisapproximateanalysis,andagoodagreementisobserved.Thismodelshallbeusedintheplanningofseveralactualportsystems.Throughtheapplicationofthismodel,itispossibletoanalyzeandevaluateperformancesofthesystems.

简介：

简介：

简介：这份报纸学习毁灭的概率的完全的monotonicity在古典风险模型和古典风险为那建模被散开使不安。作为一个副产品，作者由于Loeffen(2008)在最佳的红利问题上把一个其他的证明给结果。

简介：ThispaperaddressesthesupplychainengineeringanditsapplicationinChina’sretailingindustry.Basedontheapproachesofsystemsengineering,weproposetheconceptofsupplychainengineering,whichappliestheideaofsupplychainmanagementtotheengineeringpracticesthroughtheadvancedinformationandmanagementtechnology,tointegratethesupplychainsystemandoptimizeitsoperations.WethenillustratetheapplicationofthesupplychainengineeringinChina’sretailingindustry.Insuchpractices,wedevelopedthevirtualretailingenterprisemodeandtheFROM-SCMsystem,anddesignedthesalesassistantetc.SuchtheoryandpracticesaresuccessfullyappliedinMeiyijia,whichhastransformedMeiyijiafromatraditionalretailertoamodernserviceenterprise,andtheprofitsareresultedfromtheservicefeesratherthanthetraditionalsurplusbetweenbuyingandsellingprices.NowMeiyijiahasbuiltanecosystemwiththeretailerinthecore,theheadquarterastheserviceplatform.ThesuccessofMeiyijiainrecentyearsshowstheeffectivenessofthesupplychainengineering.