凝聚随机算子的一个不动点定理

利用拓扑度的基本性质，给出了凝聚随机算子的一个不动点定理，由此推广了Altman定理，为进一步研究随机算子方程解的存在唯一性及解的近似方法提供了一个有力的工具。     

控股股东与经营者一体化存在的问题及其治理

文章通过对控股股东与高层管理者的关联性描述,指出了控股股东与经营者的一体化趋势;然后从产权理论、交易费用理论和控制权收益三个角度对这种趋势进行原因分析;最后针对一体化带来的负面影响提出相应的对策。     

电信运营商移动互联网运营模式研究

移动互联网是全球电信运营商未来重要的发展方向，论文从产业价值链角度对电信运营商发展移动互联网的运营模式进行研究，了解各种运营模式的特点，从收益角度分析各种模式的利弊，提出渠道模式将成为主流的运营模式，希冀对电信运营商发展移动互联网带来启示作用。     

AN ALGORITHMIC APPROACH TO BAYESIAN LINEAR MODEL CALCULATIONS

A framework is described for organizing and understanding the computations necessary to obtain the posterior mean of a vector of linear effects in a normal linear model, conditional on the parameters that determine covariance structure. The approach has two major uses; firstly, as a pedagogical tool in the derivation of formulae, and secondly, as a practical tool for developing computational strategies without needing complicated matrix formulae that are often unwieldy in complex hierarchical models. The proposed technique is based upon symbolic application of the sweep operator SWP to an appropriate tableau of means and covariances. The method is illustrated with standard linear model specifications, including the so-called mixed model, with both fixed and random effects.     

Conservatism of the Accident Sequence Evaluation Program HRA Procedure

This paper presents a limited assessment of the conservatism of the Accident Sequence Evaluation Program (ASEP) human reliability analysis (HRA) procedure described in NUREG/CR-4772. The data for this study are derived from simulator examination reports from the NRC requalification examination cycle for nuclear power plant operators. The ASEP procedure was used to estimate human error probability (HEP) values for critical tasks, and the HEP results were compared with the failure rates observed in the examinations. The ASEP procedure was applied by PNNL operator license examiners who supplemented the limited information in the examination reports with expert judgment based upon their extensive simulator examination experience. Comparison of the average of the ASEP HEP values with the fraction of the population actually failed and demonstrated that the ASEP HEP values are larger (conservative) by a statistically significant average factor of two. Partitioning of tasks into subgroups based on the ASEP HEP values and comparison of the subgroup average ASEP HEP values with observed subgroup failure rates showed little or no conservatism for small ASEP HEP values, but considerable conservatism for larger ASEP HEP values.     

Iterated full partitions

Algebraic calculations that depend upon a full partition can be automated through the use of an operator P for the derivation of such a partition. Calculations that require the repeated use of P are automated by simply iterating the operator. The resulting output is general and contains sufficient structure to identify the result of a calculation for a variety of settings.     

国家自然科学基金资助项目综合评价:基于Vague 集多准则决策

采用基于Vague 集的多准则决策方法,对国家自然科学基金11 类主要竞争性资助项目的实施情况进行综合评价和排序． 首先,通过问卷调研的方式,由国家自然科学基金项目评审专家采用“高”、“不高”和“不清楚”三类语义,对各类项目按照“评审公正性”、“管理规范性”、“科研创新性”和“社会影响力”四个准则进行评价; 然后,根据问卷统计结果,将语义评价转化为Vague 估计值,并利用一种新的评分函数计算各类项目在各准则下的得分; 最后,采用正态分布的OWA 算子集结各准则下的得分,得到所有项目的综合评价和排序． 本文的研究结果将为完善国家自然科学基金的资助结构与管理模式提供重要参考依据．     

具反射边界条件的板模型迁移系统的临界性

研究非均匀介质,各向同性,具反射边界条件的板模型迁移系统的临界解.借助泛函分析方法,特别是Lp空间上的线性算子理论,证明了积分算子的主本征值(即临界参数)的性质,并获得了系统处于次临界状态的条件以及使系统处于临界状态的板厚度的存在性.     

Pseudo Self-Consistent Estimation of a Copula Model with Informative Censoring

Abstract.  We consider the case where a terminal event censors a non-terminal event, but not vice versa. When the events are dependent, estimation of the distribution of the non-terminal event is a competing risks problem, while estimation of the distribution of the terminal event is not. The dependence structure of the event times is formulated with the gamma frailty copula on the upper wedge, with the marginal distributions unspecified. With a consistent estimator of the association parameter, pseudo self-consistency equations are derived and adapted to the semiparametric model. Existence, uniform consistency and weak convergence of the new estimator for the marginal distribution of the non-terminal event is established using theories of empirical processes, U -statistics and Z -estimation. The potential practical utility of the methodology is illustrated with simulated and real data sets.     

企业经营者业绩考核可持续发展指标体系研究

现行企业经营者业绩评价模式大都忽视环境问题,时间跨度较短,仅仅看年度利税或销售额等指标,这显然与可持续发展的要求不相适应。为此,建立一套评价企业经营者业绩考核的可持续发展指标体系很有必要。文章以此为基础提出了设置企业经营者业绩考核的可持续发展指标体系的原则,构建出企业经营者业绩考核的可持续发展指标体系。