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31.
We explore young working women's perceptions of marriage and work in contemporary Egypt, when an increase in age at marriage was evident from national survey data. Both working conditions and employment opportunities declined significantly for young women even as their educational attainment increased and marriage was delayed. In‐depth interviews were conducted over a 2‐year period between 1998 and 2000 with 27 young women between the ages of 15 and 29 who were from relatively poor families and working in a range of salaried jobs in three locations. The qualitative data indicate that young women have high expectations in terms of marital living standards. They seek to achieve this in part by saving intensively before marriage when they work, and otherwise by ensuring substantial monetary support from their families. We conclude that rising material aspirations and family nucleation rather than change in female labor force participation drive marriage change in contemporary Egypt. The driving force behind this conclusion is that there is a reinforcement of the traditional values associated with the institution of marriage rather than its erosion.  相似文献   
32.
SHORT REVIEWS     
Books reviewed in this article: Laurel Bossen, Chinese Women and Rural Development: Sixty Years of Change in Lu Village, Yunnan Fabrizio Butera and Gabriel Mugny (EDS.), Social Influence in Social Reality: Promoting Individual and Social Change Harold Coward and Daniel C. Maguire (EDS.), Visions of a New Earth: Religious Perspectives on Population, Consumption, and Ecology Martha C. Nussbaum, Women and Human Development: The Capabilities Approach Fred C. Pampel, The Institutional Context of Population Change: Patterns of Fertility and Mortality across High‐Income Nations Demetrios G. Papademetriou and Deborah Waller Meyers (EDS.), Caught in the Middle: Border Communities in an Era of Globalization Per Pinstrup‐Andersen and Ebbe Scniøler, Seeds of Contention: World Hunger and the Global Controversy over GM Crops Walter Scheidel (ED.), Debating Roman Demography  相似文献   
33.
The use of drugs for indications unapproved by the Food and Drug Administration (FDA), often called “off-label use,” is widespread in children, including neonates. The widespread off-label use of drugs in neonates presents ethical and safety challenges. Since the passage of the Best Pharmaceuticals for Children Act (BPCA) in 2002, both the FDA and National Institutes of Health (NIH) have taken initiatives to facilitate and encourage research to achieve the necessary labeling for drugs routinely used in infants and children. Federal regulations provide broad rules and guidance for the protection of human subjects in research. However, there are ethical issues that a physician may face when designing clinical trials of drugs in neonates that are routinely used off-label and widely believed to be beneficial. We attempt to describe these ethical challenges and provide recommendations, including alternative study designs, to resolve them in an ethical framework that takes into account the Belmont Report, the statement of the World Medical Association (WMA), and federal regulations.  相似文献   
34.
This paper is concerned with the problem of simultaneously monitoring the process mean and process variability of continuous production processes using combined Shewhart-cumulative score (cuscore) quality control procedures developed by Ncube and Woodall (1984). Two methods of approach are developed and their properties are investigated. One method uses two separate Shewhart-cuscore control charts, one for determining shifts in the process mean and the other for detecting shifts in process variability. The other method uses a single combined statistic which is sensitive to shifts in both the mean and the variance. Each procedure is compared to the corresponding Shewhart schemes. It will be shown by average run length calculations that the proposed Shewhart- cuscore schemes are considerably more efficient than the comparative Shewhart procedures for certain shifts in the process mean and process variability for the case when the underlying process control variable is assumed to be normally distributed.  相似文献   
35.
The idea of using non-constant sampling intervals has been of interest in quality control applications since it was first suggested for the “skip-lot sampling plan” of Dodge. Recent interest has focused on the use of variable sampling interval (VSI) control schemes. VSI control schemes use a short sampling interval is given  相似文献   
36.
Shewhart, cumulative sum (CUSUM), and exponentially weighted moving average (EWMA) control procedures with variable sampling intervals (VSI) have been investigated in recent years for detecting shifts in the process mean. Such procedures have been shown to be more efficient when compared with the corresponding fixed sampling interval (FSI) charts with respect to the average time to signal (ATS) when the average run length (ARL) values of both types of procedures are held equal. Frequent switching between the different sampling intervals can be a complicating factor in the application of control charts with variable sampling intervals. In this article, we propose using a double exponentially weighted moving average control procedure with variable sampling intervals (VSI-DEWMA) for detecting shifts in the process mean. It is shown that the proposed VSI-DEWMA control procedure is more efficient when compared with the corresponding fixed sampling interval FSI-DEWMA chart with respect to the average time to signal (ATS) when the average run length (ARL) values of both types of procedures are held equal. It is also shown that the VSI-DEWMA procedure reduces the average number of switches between the sampling intervals and has similar ATS properties as compared to the VSI-EMTMA control procedure  相似文献   
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38.
Keywords chronicle and capture cultural change by creating common categories of meaning against diverse local usages. We call this the global-local tension. To test competing theories of this tension, we employ frame analysis of more than 500 journal abstracts over a 25-year period, tracking the spread of business model as an economic keyword generated during unsettled economic times. Analyses reveal the simultaneous adoption of “global” and “local”frames without one supplanting or co-opting the other. The global-local tension is conciliated by providing primacy across communities of discourse to a small collection of frames (i.e., the global presence) while maintaining a plurality of local use within communities (i.e., the local alternative).  相似文献   
39.
Some properties of control procedures with variable sampling intervals (VSI) have been investigated in recent years by Amin, Renolds et al, and others. Such procedures have been shown to be more efficient when compared to the corresponding fixed sampling interval (FSI) charts with respect to the Average Time to Signal (ATS) when the Average Run Length (ARL) values for both types of procedures are held equal. Frequent switching between the different sampling intervals can be a complicating factor in the application of control charts with variable sampling intervals (VSI). This problem is being addressed in this article, and improved switching rules are presented and evaluated for Shewhart, CUSUM, and EWMA control procedures. The proposed rules considerably reduce the average number of switches between the sampling intervals and also improve the ATS properties of the control procedures when compared to the conventional variable sampling interval procedures  相似文献   
40.
Using data on monozygotic (MZ) (identical) female twins from the Minnesota Twin Registry, we estimate the causal effect of schooling on completed fertility, probability of being childless, and age at first birth using the within-MZ twins methodology. We find strong cross-sectional associations between schooling and the fertility outcomes, and some evidence that more schooling causes women to have fewer children and delay childbearing, though not to the extent that interpreting cross-sectional associations as causal would imply. Our conclusions are robust when taking account of (1) endogenous within-twin pair schooling differences due to reverse causality and (2) measurement error in schooling. We also investigate possible mechanisms and find that the effect of women’s schooling on completed fertility is not mediated through husband’s schooling but may be mediated in part through age at first marriage.  相似文献   
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