On shrinkage m-estimators of location parameters

For a general class of continuous ( and marginally symmetric ) inultivariate distributions, based on suitable M-statistics ( involving bounded but possibly discontinuous score generating functions), shrinkage estimators of location are considered. These estimators are based on the James-Stein type rule and incorporates the idea of preliminary test estimation too. The main emphasis is laid on the study of asymptotic tdistributional ) risk properties of these est-innators, and asymptotic tin-) adraissibility results are also studied under fairly general regularity conditions.     

试论用人失察责任追究制度

建立健全用人失察责任追究制度是我国遏制用人腐败、保证高素质的人才进入各级党政领导机关的一条有效的途径。为此 ,必须以“三个代表”为指导 ,科学地界定用人失察责任追究的基本涵义、基本原则以及该制度的基本内容和运行机制。     

Multivariate forests with missing mixed outcomes

In this article, we propose a multivariate random forest method for multiple responses of mixed types with missing responses. Imputation is performed for each bootstrap sample used to build the individual trees that form the forest. The individual trees are built using a weighted splitting rule allowing downweighting of imputed observations. A simulation study shows the benefits of this approach over complete case analysis when missing responses are missing completely at random and missing at random (MAR). In particular, the gain in prediction accuracy of the proposed method is larger in the MAR case and also increases as the proportion of missing increases.     

利用Teager-Kaiser算子的多径信号抑制

为了解决多径干扰对无线定位精度的影响,该文在传统的窄带相关技术的基础上,利用TK算子对其进行改进。改进后的技术在不过多地增加计算负担的情况下,不仅保持了窄带相关技术对于长时延多径信号抑制的功能,而且还改善了其对短时延多径信号抑制效果不佳的缺陷。仿真结果证明,该算法对于无线信道的多径信号抑制起到了一定的改善作用,从而提高了无线定位精度。所以,该研究对于无线定位技术的工程应用和理论研究具有一定的参考价值。     

焦点新闻报道的定位及其兴起原因

本文从焦点新闻报道的定位入手，对焦点新闻异军突起的原因和新闻工作者的要求等进行一番“追踪”。希望能在此基础上对我国目前越来越热的焦点报道形式作出比较全面的考察。     

Gaussian copula distributions for mixed data,with application in discrimination

The construction of a joint model for mixed discrete and continuous random variables that accounts for their associations is an important statistical problem in many practical applications. In this paper, we use copulas to construct a class of joint distributions of mixed discrete and continuous random variables. In particular, we employ the Gaussian copula to generate joint distributions for mixed variables. Examples include the robit-normal and probit-normal-exponential distributions, the first for modelling the distribution of mixed binary-continuous data and the second for a mixture of continuous, binary and trichotomous variables. The new class of joint distributions is general enough to include many mixed-data models currently available. We study properties of the distributions and outline likelihood estimation; a small simulation study is used to investigate the finite-sample properties of estimates obtained by full and pairwise likelihood methods. Finally, we present an application to discriminant analysis of multiple correlated binary and continuous data from a study involving advanced breast cancer patients.     

逆商教育与高校学生教育管理工作的改进

逆商教育不仅对个人成功具有重要意义，无论从心理学还是社会学的角度对当代大学生更是具有特殊意义。基于大学生逆商教育现状，我国高校结合自身的实际情况和所面临的社会环境，应就端正学生心理咨询观念、设立心理指导机构和开设教育课程、加强逆商心理测试监控、开展实践训练、注重教师价值引导和学生自主建构等方面，采取可操作的教育管理工作措施来促进逆商教育的开展和学生的成长成才。     

中国考古学的学术定位及对人类学的诉求

由于中国历史悠久,史学传统深厚,中国考古学自产生伊始便定位于历史学.但定位于历史学的中国考古学存在信息提炼不足、理论缺失等弊病,因此,我们有必要引进人类学的理论方法,以促进中国考古学的进一步发展,更好地发挥考古学的威力.     

WORK AND THE CITY IN THE e-SOCIETY A critical investigation of the sociospatially situated character of economic production in the digital content industries in the UK

The aim of this paper is to ground debates about the 'new economy' or 'e-society' in the practice of individuals and companies producing 'new media'. The uncontroversial starting point is to question the generalization in much theorizing, and the tendency to technological reductive accounts of social and economic change. The focus here is to point to the intellectual sources of much policy in this field. The authors present case study material of three very specific parts of the new media/digital content industries (film special effects, computer games and web design). The paper concludes that both technological reductive and agentic accounts have underplayed the continuing importance of the social and economic embeddedness of production, and of the situated co-constitution of technologies, people and places. The differences between industries associated with labour processes, labour markets, users and markets for goods are highlighted. These particularities begin to offer more robust accounts of location and organization.     

企业选址、集聚经济与城市竞争力

经济学所关心的不外乎是生产什么?怎么生产?为谁生产?而本文讨论的主旨,则聚焦于在哪里生产?也就是要问:企业在哪里选址?企业在哪里进行相关的生产和经营活动?究竟都受哪些因素的影响和制约?无疑,地理和区位已成为管理的核心原则之一,选址是企业发展中的重大决策行为。本文尝试用集聚经济理论探讨企业选址和城市竞争力之间的关系,将企业选址指向性的内容拓宽到城市和区域的多个领域。