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.     

广东省生物医药产业集聚水平研究

本文利用 EG 指数和区位商对广东省生物医药产业的总体集聚水平和各地市的相对专业化水平进行了测度,并检验了区位商的统计显著性。研究结果表明：广东省生物医药产业的空间分布在总体上呈现出集聚发展的特征,有5个地区（广州、深圳、珠海、中山和佛山）的专业化水平大于1,其中广州、深圳、中山和珠海的区位商具有统计显著性。     

On tie breaking in competitive location under binary customer behavior

Ties in customer facility choice may occur when the customer selects the facility with maximum utility to be served. In the location literature ties in maximum utility are broken by assigning a fixed proportion of the customer demand to the facilities with maximum utility which are owned by the entering firm. This tie breaking rule does not take into account the number of tied facilities of both the entering firm and its competitors. In this paper we introduce a more realistic tie breaking rule which assigns a variable proportion of customer demand to the entering firm depending on the number of tied facilities. We present a general framework in which optimal locations for the old and the new tie breaking rules can be obtained through Integer Linear Programming formulations of the corresponding location models. The optimal locations are obtained for the old tie breaking rule for different values of the fixed proportion and a comparison with the results obtained for the new tie breaking rule is drawn with data of Spanish municipalities in a variety of scenarios. Finally, some conclusions are presented.     

小世界创新网络动态演化及其效应研究

低度、中度和高度开放的创新网络在创新集群创立和解体的动态演化过程中,其表现出的小世界性对创新绩效的效应有着较大差异． 创新绩效同创新网络小世界性间往往呈现倒U形关系,但该关系只在特定开放度下的创新网络演化到特定阶段才会显现: 低度开放的网络的小世界性同创新绩效的倒U 形关系在创新集群建立阶段显著,而在创新集群解体阶段不显著; 高度开放的网络则恰好相反; 在网络演化的其他阶段,小世界性对创新绩效并未构成显著影响． 这很可能是由于在创新绩效显著变化的阶段,创新个体的能动性较强,更倾向于接受新知识: 在低度开放的网络中,创新绩效显著上升的阶段主要集中于新的创新集群建立的阶段,而在高度开放的网络则主要集中于原有创新集群解体的阶段． 对中国专利合作发明数据的回归分析结果为该研究结论提供了实证依据． 因此,应当保持一个适度集聚的创新网络,以保证其不会传播过多冗余信息; 应在创新网络演化的不同阶段采用不同的开放策略,以充分利用高度和低度开放的创新网络演化到不同阶段所发挥的优势,同时,应当主动按照新兴技术下的新形势适当调整创新网络结构关系．     

Understanding public attitudes towards Social Security

There has been very little research on why individuals hold different attitudes toward Social Security. In this article we integrate social location theory and political predisposition theory to provide a framework of explanation and test these theories using a unique sample from the 1998 General Social Survey. Our multivariate results reveal that social structural positions along the lines of race, gender, class and age play a more important role than political predispositions in explain-ing individual differences in support for the current Social Security system against privatisation. Political party affiliation also partly contributes to variation in support for Social Security, but political ideology does not have a significant effect. Our results suggest that with regard to support for Social Security, primary consideration must rest on social structural positions. Racial minorities, women, the poor and the elderly tend to dislike a drastic change in the current Social Security system, and Social Security reform ought to pay attention to their concerns. Our robust finding of a positive relationship between age and support for Social Security also challenges much of the established knowledge, pointing to an intergenerational discord over Social Security. It is also important to differentiate among social welfare programmes in order to uncover the real determinants of public attitudes towards them.