全文获取类型
收费全文 | 4517篇 |
免费 | 77篇 |
国内免费 | 3篇 |
专业分类
管理学 | 502篇 |
民族学 | 27篇 |
人口学 | 395篇 |
丛书文集 | 29篇 |
理论方法论 | 331篇 |
综合类 | 87篇 |
社会学 | 1986篇 |
统计学 | 1240篇 |
出版年
2023年 | 31篇 |
2021年 | 25篇 |
2020年 | 77篇 |
2019年 | 135篇 |
2018年 | 122篇 |
2017年 | 205篇 |
2016年 | 125篇 |
2015年 | 104篇 |
2014年 | 124篇 |
2013年 | 940篇 |
2012年 | 149篇 |
2011年 | 121篇 |
2010年 | 84篇 |
2009年 | 107篇 |
2008年 | 100篇 |
2007年 | 89篇 |
2006年 | 75篇 |
2005年 | 78篇 |
2004年 | 73篇 |
2003年 | 61篇 |
2002年 | 89篇 |
2001年 | 91篇 |
2000年 | 76篇 |
1999年 | 89篇 |
1998年 | 79篇 |
1997年 | 71篇 |
1996年 | 62篇 |
1995年 | 76篇 |
1994年 | 60篇 |
1993年 | 59篇 |
1992年 | 68篇 |
1991年 | 69篇 |
1990年 | 76篇 |
1989年 | 61篇 |
1988年 | 45篇 |
1987年 | 45篇 |
1986年 | 50篇 |
1985年 | 56篇 |
1984年 | 57篇 |
1983年 | 42篇 |
1982年 | 37篇 |
1981年 | 33篇 |
1980年 | 40篇 |
1979年 | 47篇 |
1978年 | 37篇 |
1977年 | 26篇 |
1976年 | 22篇 |
1974年 | 21篇 |
1972年 | 20篇 |
1971年 | 21篇 |
排序方式: 共有4597条查询结果,搜索用时 0 毫秒
61.
62.
Fergany N 《The International migration review》1982,16(4):757-780
"The focus of this article is the impact of emigration on national development in labor sending countries experiencing wide-scale emigration, the main contention being that, due to the characteristics of contemporary labor movements among Arab countries, there obtains a contradiction between short term benefits and long term adverse effects. The article briefly defines development, then presents empirical evidence from the Yemen Arab Republic of the negative impact of labor emigration." 相似文献
63.
As a guide for how to select a new executive director, a family agency adopted the search committee process from higher education. The approach included clarifying agency goals and the director's qualifications, a board-staff screening, and interviews held jointly with public representatives before final board selection. 相似文献
64.
65.
66.
Cochran N 《Evaluation and program planning》1979,2(1):1-4
Characteristics of the population and economic measures that constitute traditional social indicators are compared with more recent “quality of life” measures to demonstrate that social indicators are always value statements at the policy level. The possibility of alternative perspectives is illustrated. It is suggested that an awareness of the assumptions implicit in any given indicator is as important as the data they provide. 相似文献
67.
Ronald N. Taylor 《决策科学》1975,6(3):409-429
In this paper the implications of cognitive strain for decision-making effectiveness are explored. Literature concerning the psychological processes of decisionmakers which underlie the operation of cognitive strain and which predispose them to the effects of cognitive strain, is reviewed. Next, the impact of cognitive strain on narrowly constraining or “bounding” rational decision-making is examined, and the choice strategies of satisficing and incrementalizing are criticized as failing to broaden the bounds of rational decision-making. Finally, elements of an eclectic choice strategy designed to assist decision-makers handle the informational demands of complex decision problems are discussed. 相似文献
68.
J. N. Ayertey 《Researches on Population Ecology》1980,22(1):101-116
Summary This paper describes a series of experiments conducted to determine whySitophilus zeamais
Mots. andSitotroga cerealella (Oliv.) could not survive together in maize cultures in the laboratory. The effect ofS. zeamais on different developmental stages ofS. cerealella was investigated. The presence of adultS. zeamais slightly affected moth copulation, egg laying and moth eggs in a mixed culture, but large numbers of developing moths inside
maize grains were killed by the adult weevil through feeding on the grains. The major cause of elimination ofS. cerealella byS. zeamais from mixed cultures was therefore found to be damage to the immature moths in grain and such moth mortality increased as
the developing moths became bigger in the grains. A weevil: grain ratio of approximately 1.4∶1 was found to be the critical
weevil density at which the moth disappeared from the mixed cultures. 相似文献
69.
70.
Nils Chr Stenseth Ottar N. Bj?rnstad Takashi Saitoh 《Researches on Population Ecology》1998,40(1):85-95
We interpret gradients in population dynamics of the gray-sided vole from the southwestern part of the island of Hokkaido
to its northeastern part within the framework of a phenomenological model involving the relative length of summer and winter.
In Hokkaido, as in other northern regions, both spring and fall is considered as short transition periods between the two
main seasons — summer (the primary breeding season) and winter (the non-reproductive or secondary breeding season). We show
that the geographic transition in dynamics may be understood as the combined consequence of different patterns of density-dependence
during summer and winter, and geographically varying season lengths. Differences are shown to exist between summer and winter
with respect to strength of density-dependence. Direct density-dependence, in particular, is stronger during winter than during
summer. A model is presented to show how relative lengths of seasons can induce both stable and periodically fluctuating population
dynamics. The results are compared and contrasted with what is otherwise known about the gradient in rodent dynamics in Fennoscandia. 相似文献