Analyzing large scale exchange networks

Exchange theories or their implementations in algorithms have limited utility because they can be applied only to quite small networks. They cannot be applied to larger networks until that size limit is removed. Domain Analysis cuts networks into smaller pieces at the boundaries of strong power domains. Domain Analysis identifies strong power and breaks, and distinguishes domains that function exactly as they would were they free-standing, and components that do not. Support for the finding of breaks and the distinction between domains and components are obtained using both experimental data and simulations based on X-Net. To illustrate the use of Domain Analysis, it is applied to find the incidence of strong power in large exchange networks. The application shows that the incidence of strong power decreases as network density increases, and that strong power occurs only infrequently in dense networks. We conclude by calling for ever more general analytic procedures.     

中国企业的软实力差距与软实力培育——基于印度Tata Steel公司和宝钢的对比分析

金融海啸和经济全球化的背景下,拥有强大软实力的企业更能够面对全球竞争,更能承受经济不景气的打击,开拓更多的海外市场,并占据更大的市场份额。通过发展资源基础观,文章提出了企业软实力的构成和表现,通过对比印度Tata Steel公司和宝钢,指出了中国企业在软实力方面的差距,然后提出了中国企业建立软实力的四个阶段,分析了中国企业培育软实力的关键点与培育策略。     

A modified Friedman test for randomized complete block designs

The Friedman test is often used for a randomized complete block design when the normality assumption is not satisfied or the data are ordinal. The Friedman test can be viewed as an extension of the sign test for multiple measurements within each subject or block. We propose a modified Friedman test based on the Wilcoxon sign rank approach. Coincidentally, Tukey proposed a test statistic similar to our proposed test, but blocks are ranked by the minimum difference within each block. In the proposed test, we use the variance of block to rank the blocks, with the least variance being ranked the smallest. In both Tukey test and the modified Friedman test, linear ranks are used for blocks and treatments. The Tukey test belongs to the family of weighted-ranking test from Quade (1979 Quade, D. (1979). Using weighted rankings in the analysis of complete blocks with additive block effects. Journal of the American Statistical Association 74(367):680–683. [Google Scholar]).The modified Friedman test, the Friedman test and the Tukey test are compared under various conditions and the results indicate that the proposed test is generally more powerful than the Friedman test and the Tukey test when the number of groups is small.     

A simplified estimation procedure based on the EM algorithm for the power series cure rate model

The family of power series cure rate models provides a flexible modeling framework for survival data of populations with a cure fraction. In this work, we present a simplified estimation procedure for the maximum likelihood (ML) approach. ML estimates are obtained via the expectation-maximization (EM) algorithm where the expectation step involves computation of the expected number of concurrent causes for each individual. It has the big advantage that the maximization step can be decomposed into separate maximizations of two lower-dimensional functions of the regression and survival distribution parameters, respectively. Two simulation studies are performed: the first to investigate the accuracy of the estimation procedure for different numbers of covariates and the second to compare our proposal with the direct maximization of the observed log-likelihood function. Finally, we illustrate the technique for parameter estimation on a dataset of survival times for patients with malignant melanoma.     

中国核电发展的现状与展望

发展核电是我国经济可持续发展的必然选择,也是一项十分艰巨困难的任务。文章探讨了我国核电发展的规划蓝图及核电产业"两步走"的设想,提出了核电产业目前存在的能源结构优化、规模效应、产业组织及技术模式等几个方面的问题。同时,指出我国核电发展正处于关键时期,核电发展应适时地从项目启动走向在总体战略指导下有目标的推进。根据我国核电的技术经济特性,我们提出了发展前期采取产业政策扶植、发展中完善核电的市场建设,到最后行业管制下放松规制的"三阶段"决策思想。     

巴沙尔政府执政以来的叙美关系探析

巴沙尔政府执政以来,叙美关系发生重大改变,首先巴沙尔政府以“支恐”而与美关系出现倒退,两国关系在伊拉克战争以及在黎巴嫩问题上进一步激化。但叙利亚在中东战略部署中具有不可替代的作用,因此,两国都力求改善两国关系。但叙以和谈进程、叙伊“准同盟”关系及恐怖主义问题等因素导致两国关系一度陷入僵局。总之,叙美关系不会在短时期内迅速升温,叙利亚反美的长期基调也不会出现明显改变的迹象。     

基于知识产权视角的企业技术创新动力研究

技术创新为知识产权制度的形成提供了基础条件,知识产权为技术创新活动提供了激励与保障,知识产权制度与技术创新之间互动关联。知识产权制度作为一种有效的制度安排是激励企业技术创新的有效手段,从知识产权视角对企业技术创新动力进行分析为企业技术创新活动提供了有利的理论支持。     

论批评性话语分析

本文探索了批评性话语分析的理论渊源,并论述了批评性话语分析的研究方法和研究范围,最后论文阐述了批评性话语分析的研究前景和研究意义,作者认为批评性话语分析在语言学界日益成为一个学术焦点,对批评性话语分析的研究能使公众认清话语中隐藏的权力、意识形态的真实面貌,同时在揭露权力话语对公众的欺诈性上是具有深远意义的。批评性话语分析的主要任务是提高公众对大众语篇的敏感性,培养公众的话语批判意识。     

公共管理中的政府俘获与权力资本

在有些经济转轨国家,政府俘获的出现使改革非但未能孕育出繁荣的市场经济和法治与民主,反而导向了贫富两极分化和社会的动荡。政府俘获的产物——权力资本,作为一种特殊的资本形态已成为阻碍落后市场经济国家经济发展的重要因素,它不仅使市场调节失灵而且使政府公共管理失败。传统经济向市场经济转轨的国家,转轨成功的关键是通过法治建构解决公共管理中的政府俘获和权力资本问题,而公民有组织的依法维权运动是走向法治的重要推动力量。