民族地区能源、经济与环境系统协调评价研究

随着我国民族地区经济的发展,能源和环境对经济的制约越来越强,能源—经济—环境[3E]系统协调矛盾凸显。本文旨在科学发展观的指导下,通过建立民族地区3E系统协调评价体系和评价指标,并结合实证数据,分析研究民族地区3E系统存在的主要问题,提出促进民族地区3E系统协调性发展的建议。     

复合免疫刺激物——大肠杆菌苗的研制及效力测定

采用对比试验方法 ,以小白鼠为实验动物 ,进行了复合免疫刺激物———大肠杆菌苗的研制及效力测定。结果表明 :试验组菌苗的保护率为 84 .6 2 % ,高于对照组、氢氧化铝胶苗组 5 3.85 %(P <0 .0 5 )、蜂胶佐剂苗组 5 8.33% (P <0 .0 5 )、空白对照组 38.4 6 % (P <0 .0 1) ;试验组小白鼠的增重率为 2 7.5 2 % ,高于对照组氢氧化铝胶苗组 2 2 .31% (P <0 .0 1)、蜂胶佐剂苗组 2 3.98% (P <0 .0 1)、空白对照组 17.2 2 % (P <0 .0 1) ;试验组免疫器官指数为 8.0 1% ,高于空白对照组 7.6 7% (P <0 .0 1)与铝胶苗组 7.96 % (P >0 .0 5 )。表明该复合免疫刺激物———大肠杆菌苗的免疫效力较好 ,复合免疫刺激物具有较强的免疫增强力 ,是一种较好的免疫佐剂。     

Characterizations based on order statistics under sampling without replacement

In this paper, we consider finite populations and investigate their characterizations by regressions of order statistics under sampling without replacement. We also investigate some asymptotic results when the size of the population goes to infinity.     

Flexible univariate and multivariate models based on hidden truncation

A broad spectrum of flexible univariate and multivariate models can be constructed by using a hidden truncation paradigm. Such models can be viewed as being characterized by a basic marginal density, a family of conditional densities and a specified hidden truncation point, or points. The resulting class of distributions includes the basic marginal density as a special case (or as a limiting case), but also includes an array of models that may unexpectedly include many well known densities. Most of the well known skew-normal models (developed from the seed distribution popularized by Azzalini [(1985). A class of distributions which includes the normal ones. Scand. J. Statist. 12(2), 171–178]) can be viewed as being products of such a hidden truncation construction. However, the many hidden truncation models with non-normal component densities undoubtedly deserve further attention.     

高校体育图书资料的管理与利用

高校体育图书资料是高校图书资料情报系统的有机组成部分,科学管理与利用体育图书资料工作是提高高校体育教学科研的有效保障。     

Saving behaviour and earnings uncertainty: Evidence from the British Household Panel Survey

For the first time, this paper uses a panel data set, the British Household Panel Survey, to analyse saving behaviour in Britain. One objective is to test the precautionary saving hypothesis, according to which households save to self-insure against uncertainty. Our results show that in accordance with this hypothesis, various measures of uncertainty based on earnings variability have a statistically significant effect on households' saving decisions. Moreover, in accordance with the life cycle model, households save more if they expect their financial situation to deteriorate. Received: 15 June 1999/Accepted: 4 January 2001     

Intention to emigrate in transition countries: the case of Albania

We analyse the profile of potential emigrants from Albania using data from the Central and Eastern Europe Eurobarometer in 1992. Respondents were asked to rate on a four-point scale the likelihood that they would go to live in Western Europe. Our results show that intention to emigrate is correlated positively with males, education and certain occupations, and negatively with age. There is little relation between emigration and income. Those who support the introduction of a free market in Albania are also more likely to emigrate than those who do not. Received: 24 August 1998/Accepted: 17 April 2000     

青海厄鲁特蒙古与清朝之早期关系述略

清定鼎之初 ,因忙于镇压中原地区的各种反抗势力 ,对于西陲各地只能采取安抚稳定的策略 ,即羁縻政策。清康熙帝之时 ,则逐步加强了对青海地区的统治和管辖 ,将青海诸部纳入中央势力范围之内。