全文获取类型
收费全文 | 869篇 |
免费 | 18篇 |
专业分类
管理学 | 131篇 |
民族学 | 1篇 |
人口学 | 116篇 |
丛书文集 | 15篇 |
理论方法论 | 79篇 |
综合类 | 13篇 |
社会学 | 420篇 |
统计学 | 112篇 |
出版年
2020年 | 8篇 |
2019年 | 7篇 |
2018年 | 18篇 |
2017年 | 20篇 |
2016年 | 14篇 |
2015年 | 10篇 |
2014年 | 22篇 |
2013年 | 153篇 |
2012年 | 24篇 |
2011年 | 24篇 |
2010年 | 20篇 |
2009年 | 23篇 |
2008年 | 25篇 |
2007年 | 12篇 |
2006年 | 14篇 |
2005年 | 41篇 |
2004年 | 19篇 |
2003年 | 18篇 |
2002年 | 27篇 |
2001年 | 16篇 |
2000年 | 17篇 |
1999年 | 16篇 |
1998年 | 11篇 |
1997年 | 20篇 |
1996年 | 10篇 |
1995年 | 8篇 |
1994年 | 8篇 |
1993年 | 14篇 |
1992年 | 16篇 |
1991年 | 21篇 |
1990年 | 16篇 |
1989年 | 16篇 |
1988年 | 22篇 |
1987年 | 10篇 |
1986年 | 9篇 |
1985年 | 12篇 |
1984年 | 11篇 |
1983年 | 8篇 |
1982年 | 15篇 |
1981年 | 11篇 |
1980年 | 7篇 |
1979年 | 12篇 |
1978年 | 9篇 |
1977年 | 13篇 |
1976年 | 8篇 |
1975年 | 12篇 |
1974年 | 6篇 |
1973年 | 5篇 |
1970年 | 3篇 |
1969年 | 4篇 |
排序方式: 共有887条查询结果,搜索用时 15 毫秒
131.
We surveyed National Science Foundation (NSF)-funded research in Mississippi to determine the economic extent of research damage and delays due to Hurricane Katrina. While several facilities were physically damaged, we found that the largest effects were time delays and missed opportunities. While psychological factors were not part of the original economic impact study, it became clear that they played an important role. Specifically, the Principal Investigator's (PI's) attitude of “just another delay” was one cultural barrier to fully accounting for the cost of these research delays. We concluded that Principal Investigators, with the assistance of funding agencies, should be better trained to measure time and opportunity costs associated with their research, so future disaster recovery efforts can more fully address those needs. 相似文献
132.
In developed countries, mortality decline is decelerating at younger ages and accelerating at old ages, a phenomenon we call “rotation.” We expect that this rotation will also occur in developing countries as they attain high life expectancies. But the rotation is subtle and has proved difficult to handle in mortality models that include all age groups. Without taking it into account, however, long-term mortality projections will produce questionable results. We simplify the problem by focusing on the relative magnitude of death rates at two ages (0 and 15–19) while making assumptions about changes in rates of decline at other ages. We extend the Lee-Carter method to incorporate this subtle rotation in projection. We suggest that the extended Lee-Carter method could provide plausible projections of the age pattern of mortality for populations, including those that currently have very high life expectancies. Detailed examples are given using data from Japan and the United States. 相似文献
133.
134.
Telephone groups are an important for meeting the needs of clients who cannot get to face-to-face groups, or prefer the convenience of meeting by telephone. This article describes the knowledge and skills that social group workers need to develop, implement, and lead telephone groups. Particular attention is paid to the clinical adaptations that are needed when leading telephone as compared to face-to-face groups using examples from caregiver psychoeducational and support groups. 相似文献
135.
Previous studies have shown that active consent procedures result in sampling bias in surveys dealing with adolescent risk behaviors such as cigarette smoking and illicit drug use. To examine sampling bias from active consent procedures when the survey topic pertains to childhood obesity and associated health behaviors, the authors pair data obtained from both active and passive consent procedures. The authors find that parents of children who are overweight or at risk for being overweight are significantly less likely to give active consent. In addition, parents of children enrolled in lower grades are more reluctant to consent to participate. 相似文献
136.
This study uses structural equation modeling (SEM) with a sample of 760 college males to test various hypotheses regarding the avenues whereby harsh corporal punishment and a troubled relationship with parents increase the risk that a boy will grow up to engage in sexual coercion and dating violence. We found that three variables--a general antisocial orientation, sexually permissive attitudes, and believing that violence is a legitimate component of romantic relationships--mediated most of the association between negative parenting and our two outcomes. In addition to this indirect influence, we found that harsh corporal punishment had a direct effect upon dating violence. The findings are discussed with regard to various theoretical perspectives regarding the manner in which family of origin experiences increase the chances that a young man will direct violence toward a romantic partner. 相似文献
137.
Population dynamics of humans and other animals 总被引:7,自引:1,他引:7
Ronald D. Lee 《Demography》1987,24(4):443-465
Human population dynamics, at least until the past century, have probably been governed by homeostasis and in this resembled those of other animals. Because human population homeostasis was probably substantially weaker than among large mammals, its operation has been less obvious. Nonetheless, the empirical evidence for advanced agriculturalists is compelling. Unlike animals, the human population has tended toward equilibria that have been tending upward at an accelerating rate. The acceleration might reflect long-run positive feedback between density and technological progress, as Boserup has suggested. Because homeostasis was weak, its role in shorter run historical explantation is limited; its force was gentle and easily overwhelmed by other particular influences. Malthusian oscillation, in the sense of distinctive medium-run dynamics arising from homeostasis, probably did not occur. And because homeostasis was weak, density dependence can in principle explain only a minute proportion of the annual variation in population growth rates. Yet homeostasis plays an essential role in demographic theory. Without it, we are incapable of explaining population size and change over time except by recounting a mindless chronology of events back to the beginning of humanity--whenever that was. Without it, we cannot explain the response of population growth to economic growth. Without it, we cannot explain recovery from catastrophe or the rapid natural increase in many frontier regions. Without it, we cannot properly analyze the influence of climatic variation and other partially density-independent factors. Our basic understanding of human history requires a grasp of what homeostasis can explain and what it cannot. A homeostatic approach to population dynamics also leads to questions about the roles of reproductive norms and institutions, not just whether they encourage high or low fertility, but whether they make natural increase responsive to resource abundance. And if they do, whether they strike the balance of population and the means of subsistence at a relatively prosperous or impoverished level. Such considerations may contribute to an understanding of broad preindustrial differences among the regions of the world in densities, average levels of vital rates, and living standards--which was very much how Malthus viewed the matter. Ordinary homeostatic tendencies essentially vanish in the course of economic development, and they were probably all but gone from much of Europe by the end of the 19th century.(ABSTRACT TRUNCATED AT 400 WORDS) 相似文献
138.
Intergenerational relations and reproductive behavior in Taiwan 总被引:1,自引:0,他引:1
The character of intergenerational relationships between parents and their adult unmarried children in Taiwan is consistently and systematically related to the later reproductive behavior of the children after they marry. The greater the extent to which the adult unmarried children are exposed to nonfamilial relationships and contexts in school, at work, in the use of wages, in marriage decisions, and in first place of residence after marriage, the fewer children they will have and want and the greater the likelihood that they will begin contraception for spacing rather than for limiting their number. These relationships are consistent with theories about the transformation of familial relationships and reproductive patterns in the course of development. 相似文献
139.
140.
Louw R 《Journal of homosexuality》2005,48(3-4):141-162
As a consequence of the 1994 adoption of a justiciable Bill of Rights in South Africa, with an equality provision prohibiting discrimination on the ground of sexual orientation, a coalition of gay and lesbian organisations set about implementing a progressive agenda of gay and lesbian rights litigation. In striking down the offence of sodomy, the Constitutional Court established a jurisprudence of gay and lesbian rights to equality, dignity and privacy that proved to be the foundation for significant litigation around family law issues. Subsequent to the sodomy judgement, the Court has ruled that same-sex couples who are in permanent life partnerships should be entitled to the same rights as married couples to immigration, employment benefits, custody and adoption of children. Despite the extensive equality jurisprudence of the Court, it is still uncertain whether it will rule in the future in favour of same-sex marriage or in favour of a civil union/domestic partnership model. 相似文献