Model averaging for multivariate multiple regression models

The theories and applications of model averaging have been developed comprehensively in the past two decades. In this paper, we consider model averaging for multivariate multiple regression models. In order to make use of the correlation information of the dependent variables sufficiently, we propose a model averaging method based on Mahalanobis distance which is related to the correlation of the dependent variables. We prove the asymptotic optimality of the resulting Mahalanobis Mallows model averaging (MMMA) estimators under certain assumptions. In the simulation study, we show that the proposed MMMA estimators compare favourably with model averaging estimators based on AIC and BIC weights and the Mallows model averaging estimators from the single dependent variable regression models. We further apply our method to the real data on urbanization rate and the proportion of non-agricultural population in ethnic minority areas of China.     

企业目标与国有企业改革

企业目标是决定企业行为的关键因素,我国的国有企业具有利润目标和多重非利润目标,从这个角度出发,可以解释国有企业的低效率的根源,同时可以说明,不改变利润目标和多重非利润目标并存的状况,国有企业改革不可能取得突破。国有企业多重目标的形成源于作为出资人的政府的多重目标,要实现国有企业目标单一化,就必须改变国有资产的出资人体系,成立独立于政府的、以国有资产保值增值为惟一职责的国有资产管理机构。     

基于投影的直觉模糊数多属性决策方法

针对指标取值以直觉模糊数形式给出的多属性决策问题,提出了一种基于投影的直觉模糊决策方法.该方法依据一般投影分析方法的基本思路,给出了解决属性取值为直觉模糊数的多属性决策问题的计算步骤,其核心是通过构建并求解每个方案在虚拟正、负理想方案上的投影,进而计算出每个方案对虚拟正、负理想方案的相对隶属度,即可得到所有方案的排序结果.最后给出的数值算例表明,该方法简单、有效和易于计算.     

凉山彝区中等职业教育的问题与对策 —— 德国双元制职业教育的经验借鉴

大力发展凉山州职业教育,对增强彝区群众脱贫致富的能力有重要意义。发展职业教育是凉山地区精准扶贫的重要路 径。凉山州职业教育目前主要面临的问题有：专业设置不合理、校企合作不足、办学经费短缺、毕业生对口就业困难等。提出 了四点对策和建议：（1）基于职业分类细化专业方向细化;（2）结合区域优势,打造民族特色人文专业;（3）以政策手段引导企业 参与职业教育;（4）学时安排上要考虑企业需求。     

On the Screening of Large Numbers of Significance Tests

A brief review is given of procedures for the collective analysis of a large number of significance tests. A simple procedure previously supplied for isolating 'real' effects on the basis of a large number of significance tests is generalized to deal with two-sided tests and is also related more explicitly to the false discovery rate.     

高适、岑参边塞诗创作风格差异及其成因探赜

唐代边塞诗派的杰出代表高适、岑参具有不同的创作风格.高诗富有深沉浑厚的现实主义气息,岑诗饶有豪放奇丽的浪漫主义色彩.从两人的生活基础、人生阅历、所处地域、性格、气质、创作心态诸方面进行比较,可探知形成高、岑诗风差异的原因.     

ERROR RATES FOR ORTHOGONAL CONTRASTS AFTER A SIGNIFICANT F-TEST1

Tables are given for the experiment-wise error rate when orthogonal contrasts are tested following a significant F test in a balanced one-way classification.     

学习地方党史以史为鉴促进抚州发展

抚州地方党组织及其领导下的抚州人民,创造了光荣的业绩,作出了应有的贡献;抚州地方党史留下了丰富的革命遗产,也留下了宝贵的经验和深刻的启示;学习地方党史,就是要以史为鉴,坚持身体力行“三个代表”,继承和发扬优良的革命传统和作风,使全体抚州人民凝聚成强大的合力,加快抚州的建设和发展。     

The Minimal Spanning Tree Preservation Approaches for DNA Multiple Sequence Alignment and Evolutionary Tree Construction

In this paper, we propose a new criterion, namely the minimal spanning tree preservation approach, for both of the DNA multiple sequence alignment and the construction of evolutionary trees. It is our aim to keep the proximity information among the sequences or species via our approach. The basic idea behind this approach is that those distances among species which are close to one another are more informative than the others.     

Three Conceptions of Quantified Societal Risk

In several European countries efforts are undertaken, in particular with regard to fixed industrial installations and transport of dangerous substances, to quantify the "societal risk" (SR) of accidents that may cause more than one victim at a time. This article explores the nature of such efforts. SR-models are essentially ways to structure the distribution of potential social costs of decisions about hazardous activities (e.g., costs of risk reduction, of land use forgone). First, the various ways to describe SR quantitatively, and to set limits to SR will be presented in short. Next, using a scheme developed by Fischhoff and colleagues, the various approaches will be placed in broad categories of reaching acceptable risk decisions: bootstrapping, formal analysis, and professional judgment. Each of the three categories offers a particular appreciation of the risks as 'external costs'. This has important political implications. In the discussion it is argued that local SR-limits, by the very nature of SR, should be set in a way that creates consistency with any potential supra-local interests involved. Second, particular attention is paid to the validity of claims that SR-limits should reflect a strong risk aversion.