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51.
对《哲里木畜牧学院学报》1996— 1999年 4年共 16期学报论文后所引用的参考文献的年代、类型、语种等进行了统计分析 相似文献
52.
The paper describes a methodology to be used for analysis and design of human activity systems. The methodology is based on an analysis of the decision settings whereas most other decision analysis methodologies are analysing the process. The decision concept is analysed and discussed. A distinction between programmed and programmable as well as non-programmed and non-programmable decisions is proposed. A classification of different information types for decision making is presented. A methodology based on a systemic and systematic analysis of the information requirements of an organization is proposed. This methodology also indicates organizational discrepancies and information imbalances. The methodology focuses the settings of the decisions on all levels of organizations. The methodology can be regarded as a dynamic, learning system. The author proposes further research on the individuals decision making abilities. 相似文献
53.
:西夏在长期的对外交往中形成了以趋利避害、左右逢源、灵活务实为主要特征的对外政策 ,表现出和平交往与兵戎相见的错综复杂性。西夏的对外政策既是西夏与诸政权间力量对比消长变化的产物 ,又提供了其自身发展壮大和与各强大势力巧妙周旋、长期并存的重要条件 ,同时也给当时北方民族关系和政治格局以深刻影响 相似文献
54.
大城市低收入老人群体状况分析 总被引:6,自引:0,他引:6
本文依据在广州的调查数据 ,揭示了低收入老人的群体特征 ,提出制订老龄政策时 ,适当照顾低收入老人 ,同时动员家庭、单位和社会都来积极关心这部分脆弱群体 相似文献
55.
The paper begins by outlining the development of social indicators work and social monitoring at the national level in New Zealand and comments on how this relates to the international movement. It describes the 'key' indicators/life stage approach developed by the New Zealand Planning Council in the early 1980s. This exercise continues from a university base and the fourth report in the series, entitled Tracking Social Change in New Zealand was published in early 1998. Examples are presented to show how the results can be used to highlight the policy implications of changing social trends. 相似文献
56.
There is a vast empirical literature investigating the effects of child care costson female employment. Day-care costs are usually treated as a reduction infemale wages and are supposed to reduce a woman's propensity to participatein the labor market. In this paper we argue that an analysis of the effects ofchild care on the employment of mothers in Germany should focus on theavailability rather than the affordability of care, due to peculiarities of theGerman day-care regime. Our empirical findings cast doubt on the effectivenessof the current German day-care regime. Specifically, we question the extent towhich it enables mothers to participate in the labor market. 相似文献
57.
基层人口计划是各级人口计划的基础 ,也是落实人口计划时的执行计划 ,它直接影响到家家户户。现行基层人口计划的管理措施中 ,有些地方亟待完善。改革现行基层人口计划管理机制 ,让群众自愿选择生育时间已成为计划生育工作发展的必然要求 相似文献
58.
应用灰色关联分析方法研究了坪用草地早熟禾地上生物量、生殖枝数、生殖枝高、穗长、穗粒数、结实率等6个主要经济性状与种子产量以及各性状之间的关联程度。结果表明,各性状与种子产量之间的关联度大小依次为单位面积生殖枝数>单位面积地上生物量>生殖技高>穗长>结实率>穗粒数。地上生物量对生殖校高、生殖枝数和穗长的影响较大。 相似文献
59.
The devolution of many social policy responsibilities from the Federal government to states has prompted increased interest in state-level measures of need. One data source that could be used to provide more state-level information on a variety of topics is the Current Population Survey (CPS). During the past ten years the CPS has been used to produce state-level estimates on a variety of measures. However, there has been little systematic evaluation of these data. This paper provides measures of accuracy for several state-level estimates derived from the CPS. These include standard errors for single-year estimates, three-year averages, and five-year averages of the March CPS measures; standard errors for three-year averages of 12-month CPS files; and comparison of CPS-based estimates to data from the Decennial Census. The paper also examines the relative accuracy of CPS estimates based on states' size. The information in this study will help analysts better understand the tradeoffs between timeliness and accuracy to be considered when using state-level estimates derived from the CPS. 相似文献
60.
Each state has the power to establish its own policy and laws relating to child custody determination. The number of single-parent families with children that are headed by fathers has been growing in the United States. This paper explores the extent of cross-state variation in the prevalence in father-only families in 1990, and the extent to which there was cross-state variation in the increase in father-only families in the 1980s. The 1980 and 1990 Public Use Microdata Samples (PUMS) drawn from the US decennial censuses are used. Decomposition analyses of growth indicate that increases in the number of father-only families occurred across all states during this period, but at varying rates. The primary reason for the increase in most states is an increase in the proportion of ever-married single-parent families that are headed by a father. It is for these families that are headed by divorced or separated parents that state policy relating to child custody determination is most relevant. 相似文献