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.     

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.     

北京经济活动区位演变趋势分析

本文提出了未来北京经济活动区位的三个重要的演变趋势 ,这三个趋势是 :集聚与分散共存———未来北京经济活动空间分布的基本态势 ;办公业和写字楼———未来北京城区的重要行业和景观 ;园区化———未来北京产业布局的重要形式     

基于Moldflow的带金属嵌件打印机板浇口优化设计

针对带金属嵌件打印机板使用传统注塑模具设计方法时,存在开发周期长、成本高且质量不易保证等缺点,采用 计算机辅助设计软件Pro/E和有限元分析软件Moldflow相结合的方法对制品进行不同浇口位置方案下的“填充+保压 +翘曲”模拟分析,从充填时间、流动前沿温度、气穴、熔接痕和翘曲变形等方面进行了综合比较和评测,确定了最佳浇口 设计方案。结果表明,应用Moldflow软件进行模拟仿真,找出了制件在不同浇口设置环境下缺陷产生的原因,从而为避 免或消除制件上的缺陷,进一步优化模具设计、降低生产成本,为指导实际生产提供合理的依据。     

势能模式与内江市区位优势研究

运用潜能模式建立了城市区位优势比较的定量化模型，并对内江与绵阳、乐山的区位势能值进行了计算与比较．结果表明，内江的区位势能值明显高于划入成都平原经济圈的绵阳、乐山．由此得出结论：内江市具备四川省优先开发的区位优势条件．     

城市仓储型物流企业区位选择——以嘉里大通物流广州分公司为例

城市仓储型物流企业区位选择是一个复杂问题，是内部因素和外部因素共同作用的结果。为提高选址的科学性与实用性，需要综合考虑地理位置、自然条件、交通、基础设施等多种因素。本文以嘉里大通物流有限公司广州分公司的仓库选址为例，从宏观和微观的不同尺度，以案例分析为主线，在梳理企业发展现状的基础上，通过宏观层面的仓库定位分析和微观层次的仓库选址分析，运用加权评分法，最终确定符合企业和市场需求的最佳仓库区位，旨在为相关仓储企业选址提供参考和借鉴。     

Combined estimate of a location parameter

In this paper, we revisit the problem of combining estimates of location considered by Cohen (1976). Our results unify and strengthen the results of Cohen (1976), Bhattacharya (1981) and Akai (1982).     

Equivariant prediction in finite populations

A theory of equivariant prediction is developed for predicting the population total in finite populations. Minimum risk equivariant predictors (MREP) are derived under the location, scale and locationscale superpopulation models. Under the general linear model, it is shown that the best(linear) unbiased predictor (B(L)UP) is an MREP.     

岱山岛古迹考二则

岱山古泗洲堂是古代舟山群岛的重要对外海上交通渡口,其所处位置历来多有争论,<岱山古泗洲堂考证>以<参天台五台山记>等日本古籍为依据,结合实地考证,认为其址在今泥峙江窑村下张家一带.岱山书院在岱山历史发展中占有重要地位,<南宋岱山书院觅踪>对岱山书院的建立过程、院址及规模等作了较深入研究.