上海某郊区外来青年社会融入度分析

针对大量流入上海的外来青年存在的社会融入问题,选取在上海某郊区工作的368名外来青年进行问卷调查,从经济、社会、心理三个层面考察了他们的社会融入状况.经研究发现,外来青年在城市社会融入上具有滞后性、渐变性和长期性、兼容性、差异性等特点,并存在角色身份错位、关系网络构建边缘化以及社区归属感模糊等困难和问题.据此提出了相应的对策.     

Mortality of American Troops in the Iraq War

We estimate the death rate of United States troops deployed to Iraq from the beginning of the US invasion through 30 September 2006. Eighty percent of the deaths in Iraq were combat‐related. The death rate in Iraq is lower than that of the civilian population of the United States but substantially higher than that of young adults. It is much lower than the death rate of US troops in Vietnam, in part because a much smaller fraction die among those wounded in Iraq. We also estimate relative mortality levels for US troops according to numerous demographic variables through 30 November 2006. The risk of death in Iraq per deployment is shown to be highest for Marines; Naval and Air Force personnel in Iraq have lower death rates than the civilian population of comparable age. Other categories with above‐average mortality in Iraq are enlisted troops, males, younger persons, and Hispanics.     

电子类产品逆向物流网络结构设计

逆向物流运作的效率直接依赖和受限于逆向物流网络结构,结合电子类废旧产品的特点和目前国内实际运作模式,并考虑到法律法规的约束,可以设计电子类产品逆向物流网络的一般结构形式。随着各方利益分配的政策倾斜方向不同,网络结构会有不同的变化形式,研究表明,不同结构形式对逆向物流网络效率的影响巨大。构建适合国情并高效运作的逆向物流网络是非常重要的。     

城市绿地旅游资源管理的初步研究

廓清城市绿地旅游资源的定义和分类 ,城市绿地在旅游开发中具有很大作用 ,提出城市绿地旅游资源的系统规划及管理策略。     

The Use of Multiple Family Marathon as a Teaching Device

This paper discusses the rationale and methods for using a multiple family marathon as a teaching device in the context of an intensive group-supervision family therapy training program conducted by the authors. Procedures used in the marathon are described, as well as how the concept stimulates increased focus on issues common to family therapy and broadens the experience of the students. The effects of the marathon on the students' views of their therapy families and of themselves as family therapists are explored.     

Large scale communication networks—Design and analysis

The paper discusses the problem of design and analysis of large scale communication systems. An iterative process, composed of a minimum cost network design algorithm and a network performance algorithm, is presented for the solution of these problems. Computational considerations, using these algorithms, are discussed.     

Multiobjective investment planning under uncertainty

In this paper we consider the relevance of various planning methods and decision criteria to multiobjective investment planning under uncertainty. Assuming that a natural reaction to uncertainty is to operate so as to leave open as many good options as possible (as opposed to maximizing subjective expected utility) we argue that the planning process should concentrate on analyzing the effects of the initial decision, and that for this exercise the classical methods of mixed integer programming are inappropriate. We demonstrate how the technique of dynamic programming can be extended to take account of multiple objectives and use dynamic programming as a framework in which we analyze the robustness of an initial decision in the face of various types of uncertainty. In so doing we also analyze the risks involved in both the planning and decision making functions.