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961.
962.
963.
1979~2000年中国人口生育趋势:出生数据和教育数据的比较分析 总被引:2,自引:0,他引:2
本文研究中国从1979年开始提倡一对夫妇只生育一个孩子至2000年第五次人口普查的生育趋势。为此目的,本文对1979~2001年各生育调查数据与国家统计局每年人口变动调查数据进行比较研究。四普、五普的回推数据,中国国家人口计生委报表中的出生数据和公安部户籍中的出生登记也作为比较对象。鉴于材料中的矛盾,本文就分析教育部部门统计中的各种和出生数据有间接关系的记载、讨论它们内在的口径问题和它们所涉及到的工作程序问题。本文在这一基础上用小学在校学龄儿童年龄分组的数据来估计中国1979~1997年的生育水平和其他资料的可靠性。分析暗示出生数据漏报问题普偏存在,自教育数据算出来的生育数据比许多其他资料高。虽然如此,但自1996年以来比国家统计局的修正数字低。结果同时表明,中国1992年以来确实达到了低生育水平。根据教育统计资料计算的1997年的总和生育率为1·6左右。 相似文献
964.
Thomas L. Barton 《决策科学》1992,23(2):365-375
The nucleolus method has been suggested in the literature as a means for accounting decision makers to allocate joint costs in situations where entities share a common resource. The nucleolus has the advantage, vis-à-vis other methods, of maximizing the benefit to the least-well-off entity or groups of entities, and therefore reducing the possibility that one or more entities may desire to withdraw from the sharing arrangement. The nucleolus is basically a linear programming model. Because of its formulation, the nucleolus may yield multiple optimal solutions. No reformulation of the nucleolus seems to exist to overcome this problem The minimum total propensity to disrupt (MTPD) is suggested as an extension of the nucleolus to identify unique values for allocations with multiple solutions. The MTPD, while exhibiting deficiencies as a stand-alone method, is similar in overall objective to the nucleolus and its mathematical function possesses a unique minimum. It is therefore the logical method for identifying a unique nucleolus solution. The use of the MTPD extension is critically examined through a representative application. 相似文献
965.
Paced assembly lines are widely used in repetitive manufacturing applications. Most previous research on the design of paced lines has assumed that each task along the line can be performed by only one worker (or a fixed number of workers). In many cases, however, task duration times may be reduced by increasing the number of workers or changing the equipment assigned to work stations. Thus, the problem becomes one of assigning resource alternatives (e.g., workers and/or equipment) and tasks to work stations to minimize total cost for a desired production rate. For this problem, we present three procedures. The first formulates the problem as a shortest path problem and guarantees optimality. The second and third are heuristic adaptations of the shortest path procedure that are capable of solving large problems. The procedures are compared in terms of solution quality and computation time on a set of 128 randomly generated problems for which optimal solutions could be found. Our simulation results indicate that the choice of procedure depends on problem complexity and resource costs. 相似文献
966.
967.
Weinberg TS 《Journal of homosexuality》2006,50(2-3):17-40
Recent literature about sadomasochism in Sociology and Social Psychology is reviewed. Studies include survey research and questionnaire studies, content analyses, ethnographic research, and critical essays. The current state of our knowledge of sadomasochism, including its defining characteristics, sadomasochistic identities, and sadomasochistic subcultures is briefly summarized. 相似文献
968.
Michael A. Mullens Mohammed Arif Robert L. Armacost Thomas A. Gawlik Robert L. Hoekstra 《Production and Operations Management》2005,14(3):286-300
This paper describes a structured methodology for decomposing the conceptual design problem in order to facilitate the design process and result in improved conceptual designs that better satisfy the original customer requirements. The axiomatic decomposition for conceptual design method combines Alexander's network partitioning formulation of the design problem with Suh's Independence Axiom. The axiomatic decomposition method uses a cross‐domain approach in a House of Quality context to estimate the interactions among the functional requirements that are derived from a qualitative assessment of customer requirements. These interactions are used in several objective functions that serve as criteria for decomposing the design network. A new network partitioning algorithm is effective in creating partitions that maximize the within‐partition interactions and minimize the between‐partition interactions with appropriate weightings. The viability, usability, and value of the axiomatic decomposition method were examined through analytic comparisons and qualitative assessments of its application. The new method was examined using students in engineering design capstone courses and it was found to be useable and did produce better product designs that met the customer requirements. The student‐based assessment revealed that the process would be more effective with individuals having design experience. In a subsequent assessment with practicing industrial designers, it was found that the new method did facilitate the development of better designs. An important observation was the need for limits on partition size (maximum of four functional requirements.) Another issue identified for future research was the need for a means to identify the appropriate starting partition for initiating the design. 相似文献
969.
Andreea L. Erciulescu Jean D. Opsomer Benjamin J. Schneider 《Revue canadienne de statistique》2023,51(1):312-326
This article considers the case where two surveys collect data on a common variable, with one survey being much smaller than the other. The smaller survey collects data on an additional variable of interest, related to the common variable collected in the two surveys, and out-of-scope with respect to the larger survey. Estimation of the two related variables is of interest at domains defined at a granular level. We propose a multilevel model for integrating data from the two surveys, by reconciling survey estimates available for the common variable, accounting for the relationship between the two variables, and expanding estimation for the other variable, for all the domains of interest. The model is specified as a hierarchical Bayes model for domain-level survey data, and posterior distributions are constructed for the two variables of interest. A synthetic estimation approach is considered as an alternative to the hierarchical modelling approach. The methodology is applied to wage and benefits estimation using data from the National Compensation Survey and the Occupational Employment Statistics Survey, available from the Bureau of Labor Statistics, Department of Labor, United States. 相似文献
970.
Thomas Leopold 《Demography》2018,55(3):769-797
In this study, I examined gender differences in the consequences of divorce by tracing annual change in 20 outcome measures covering four domains: economic, housing and domestic, health and well-being, and social. I used data from the German Socio-Economic Panel Study (SOEP) and fixed-effects panel regression models on a sample of N = 18,030 individuals initially observed in a marital union, N = 1,220 of whom divorced across the observation period (1984–2015). Three main findings emerged from the analysis. First, men were more vulnerable to short-term consequences of divorce for subjective measures of well-being, but postdivorce adaptation alleviated gender differences in these outcomes. Second, a medium-term view on multiple outcomes showed more similarity than differences between women and men. The medium-term consequences of divorce were similar in terms of subjective economic well-being; mental health, physical health, and psychological well-being; residential moves, homeownership, and satisfaction with housework; and chances of repartnering, social integration with friends and relatives, and feelings of loneliness. Third, the key domain in which large and persistent gender differences emerged were women’s disproportionate losses in household income and associated increases in their risk of poverty and single parenting. Taken together, these findings suggest that men’s disproportionate strain of divorce is transient, whereas women’s is chronic. 相似文献