城市供水管网系统工况分析的研究

通过分析实际供水管网系统的特征，对管网工况分析所涉及的几个尚未解决的计算问题进行了研究，提出了用计算机进行工况分析的思路与框架，为管网运行调度及研究管网水质模型打下了良好基础．     

支持MLS的多层次嵌入式高可信软件架构

为增强安全关键系统的高可信能力,在分析高可信保障机制现状的基础上,提出了一种多层次的高可信软件架构。该架构采用时空分离思想、虚拟机技术,为基于MLS的嵌入式安全关键系统提供了一种整体解决方案。基于该架构,研究了多层次的安全和防危策略管理方法、信息流控制机制、可信软件的评估和认证方法,为安全关键嵌入式系统提供可认证的安全服务。     

HFC－134a水平管内流动沸腾换热研究的进展

在分析国外有关文献的基础上，对ＨＦＣ－１３４ａ水平管内流动沸腾换热研究的现状和已取得的成果进行了综述，指出了该领域进一步研究的方向．     

Determinants of fertility levels and change among developed countries: 1958–1978

This article provides a multivariate cross-national test of the hypothesis that national population/family planning policies have effected levels, and changes in fertility in developed nations over the past two decades. Variation is assessed in the total fertility rates (TFR) in 1978, and in the change in these rates between 1958 and 1978, among thirty developed countries. Measures include socioeconomic development, divorce, percent in consensual unions, female labor force participation, abortion policy, and level of contraceptive use by married couples and, government population/family planning policy. Seventy percent of the variation in 1978 TFR is related to the percent contracepting, female labor force, and the population/family planning policy measures. These are the only measures with significant direct effects. A longitudinal analysis of 1958 to 1978 change in TFRs is also conducted. This model increases R² to 75%, and the three independent variables remain significant. Implications of these findings for policy makers interested in increasing or decreasing fertility rates are noted.     

Designing two factor experiments for selecting interactions

This paper considers the problem of devising a single stage procedure for selecting the treatment combination associated with the largest interaction in a two-factor rfx× c experiment having independent normally distributed observations with common known variance. The intuitive procedure based on the best linear unbiased estimators of the population interactions is employed. Initially an indifference zone formulation is used; the problem of determining the least favorable configuration is reduced to a nonlinear programming problem with log concave objective function and a convex polytope as feasible region. A solution technique is introduced in the context of an illustrative example. The problem is also considered using a preferred population formulation; this approach requires a strengthened version of the indifference zone probability requirement. It is shown that the same sample size guarantees this requirement as does the earlier one.     

我国农村居民生育意愿转变分析

农村居民生育意愿真正开始转变是在全国推行计划生育以后,目前已发生了极大的转变,主要特征是:以期望生育两个孩子且一男一女为主流意识,还有相当比例自愿只生一个,"多子多福"观念基本没有市场,对孩子质量的追求正在替代对数量的追求。生育意愿转变的标准不应是生育政策,而应以符合可持续发展理念的要求为标准。     

如东县计划生育优质服务“三询”评估制

对改进计划生育目标管理责任制考核办法的必要性及建立计划生育优质服务以面询、电询、函询为主的"三询"评估制的必要性进行了论述,并结合如东县"三询"评估制的实践情况,对其科学性、可行性和可操作性进行了阐述,旨在为调整计划生育责任制考核机制,推动计划生育优质服务提供新的思路.     

现金流量表编制方法改进设想

根据《企业会计准则 -现金流量表》的要求 ,企业在编制现金流量表时应采用直接法报告经营活动现金流量 ,传统的直接法有工作底稿法和 T形帐户法 ,在这两种方法的操作中都要面对费脑筋的“调整分录”和“分析填列”,难度高、工作量大、自动化程度低 ,缺乏普及和实用性 ,而代码日记法则能克服这些缺陷 ,体现了简便易行的特点     

Optimal estimation of a finite population mean under generalized random permutation models

Employing certain generalized random permutation models and a general class of linear estimators of a finite population mean, it is shown that many of the conventional estimators are “optimal” in the sense of minimum average mean square error. Simple proofs are provided by using a well-known theorem on UMV estimation. The results also cover certain simple response error situations.     

论基层人口与计划生育工作的改革创新

基层人口与计划生育工作管理方法和管理机制的改革创新势在必行。应以我国《人口与计划生育法》以及地方法规为指导,改革基层已不合时宜的管理办法,以政策管理代替计划管理,以基本的生育政策引导和规范人们的生育行为。努力探索建立与社会主义市场经济相适应的人口与计划生育管理机制,建立包括村(居)民自治与行政管理相结合为特征的管理体制,建立依法管理、政策推动、"费随事转"、项目带动、部门配合、综合治理为特点的工作机制,建立资源整合、资源共享、方便群众、优质服务为特征的技术服务阵地和利益导向与社会保障制度完善,领导重视、队伍健全、投入到位为特征的综合保障体系。