基于改进的粗糙集条件信息熵和灰关联投影法的工程项目投标决策研究

投标决策是建筑企业面临的一大难题.在分析建设工程投标风险因素的基础上,提出一种基于改进的粗糙集条件信息熵和灰关联投影法的投标决策方法.文中投标风险因素的客观权重经两次修正,更具全面性和合理性;然后结合依靠专家经验确定的主观权重得到综合权重;最后将综合权重应用于灰关联投影法进行投标决策.通过应用实例,验证决策方法的可操作性和合理性,为承包商实际的投标工作提供一定的借鉴和参考.     

全概率公式的推广及其应用

全概率公式及其思想在概率统计与随机过程中具有重要作用.给出了公式在条件概率下的推广形式与具体应用.同时,得到了独立性条件下的特殊形式.     

相依样本时条件密度双重核估计 的渐近正态性’

本文证 明了孙东初在 〕 中提 出的条件密度双重核 估计。川 幻 在样 本为甲一混 合时的渐近正态性     

Stable Planes from Lie Groups with Planar Partitions

We describe necessary and sufficient conditions under which a topological translation structure obtained from a Lie group with planar partition can be turned into a stable plane, thereby proving a conjecture due to Stroppel.     

THE PROBABILISTIC PROPERTIES OF THE NONLINEAR AUTOREGRESSIVE MODEL WITH CONDITIONAL HETEROSKEDASTICITY

1.IntroductionTakeseriesmodelswithconditionalheteroskedasticityarewidelyappliedinmanyareassuchasfinancialeconomicsandeconometrics.Consequently,thereisagrowingthetheoreticalinterestinthesemodels.Inthispaper,weareexclusivelyinterestedinthefollowingnonlinearautoregressivemodelwithconditionalheteroskedasticityat=rk(Xt~1,...Iac~p,01) eth(Xt~1,'IXo~~l02)(1.1)withthefollowingassumptions(i){Et}isasequenceofindependelltideticallydistributedrandomvariableswithacommonalmenteveryWherepositivedenistyi…     

分层立方体网络的容错性分析

通过分层立方网络HCNn (n≥3)的容错性分析,从理论上探讨了分层立方网络基于比较模型的条件诊断度,并证明其条件诊断度为tc(HCNn)=3n?2,大约是传统诊断度(t(HCNn)=n+1)的3倍.     

On hypothesis testing with a partitioned random alternative

It is common in statistical practice that one needs to make a choice among m + 1 mutually exclusive claims on distributions.When m=1,it is done by the (traditional) hypothesis test.In this paper,a generalization to the case m > 1 is proposed.The fundamental difference with the case m=1 is that the new alternative hypothesis is a partition of m multiple claims and is data-dependent.Data is used to decide which claim in the partition is to be tested as the alternative.Thus,a random alternative is involved.The...     

CLASSIFICATIONS OF (2,1)-STABLE AND (1,2)-STABLE UNFOLDINGS OF MAP GERMS WITH CODIMENTION≤3

1IntroductionConsideringthecoarseuessoftheequivalencerelationonunfoldingsusedinThom'scel-ebratedlistofsevenelementarycatastrophesWassermanndeveloped(r,s)-stableunfoldingtheoryinhispaper[4]andgavetheclassificationsof(1,3)-,(3,1)-stableunfoldings.Andclassificationof(2,2)-stableunfoldingswasgivenin[51.Forthecompletenessof(r,s)-stableunfoldingtheoryanditsapplicationinbifllrcationproblemundertheframeworkof(r,s)-equiv-alenceweclassify(2,1)-stableand(1,2)-stableunfoldingsofmaPgermswithcodimentions53…     

Cyclical strategies in two-dimensional optimal control models: Necessary conditions and existence

This paper derives necessary conditions such that cyclical policies may be optimal in concave, two state variable (economic) control problems. These conditions identify four different routes. One major implication is that two of these four conditions may be met by separable models. This possibility has been overlooked so far. Therefore, even separable and structurally very simple models may be characterized by optimal cyclical policies. Indeed, it will be shown that stable limit cycles exist for concave and separable control problems.