全文获取类型
收费全文 | 12555篇 |
免费 | 347篇 |
专业分类
管理学 | 1746篇 |
民族学 | 55篇 |
人才学 | 1篇 |
人口学 | 1209篇 |
丛书文集 | 50篇 |
教育普及 | 1篇 |
理论方法论 | 1155篇 |
综合类 | 340篇 |
社会学 | 5589篇 |
统计学 | 2756篇 |
出版年
2023年 | 70篇 |
2021年 | 100篇 |
2020年 | 173篇 |
2019年 | 240篇 |
2018年 | 287篇 |
2017年 | 428篇 |
2016年 | 329篇 |
2015年 | 226篇 |
2014年 | 295篇 |
2013年 | 2088篇 |
2012年 | 437篇 |
2011年 | 358篇 |
2010年 | 295篇 |
2009年 | 262篇 |
2008年 | 323篇 |
2007年 | 303篇 |
2006年 | 274篇 |
2005年 | 301篇 |
2004年 | 278篇 |
2003年 | 285篇 |
2002年 | 318篇 |
2001年 | 330篇 |
2000年 | 301篇 |
1999年 | 307篇 |
1998年 | 233篇 |
1997年 | 192篇 |
1996年 | 211篇 |
1995年 | 166篇 |
1994年 | 154篇 |
1993年 | 185篇 |
1992年 | 211篇 |
1991年 | 205篇 |
1990年 | 188篇 |
1989年 | 171篇 |
1988年 | 166篇 |
1987年 | 170篇 |
1986年 | 163篇 |
1985年 | 189篇 |
1984年 | 154篇 |
1983年 | 171篇 |
1982年 | 116篇 |
1981年 | 109篇 |
1980年 | 102篇 |
1979年 | 116篇 |
1978年 | 114篇 |
1977年 | 83篇 |
1976年 | 76篇 |
1975年 | 87篇 |
1974年 | 83篇 |
1973年 | 64篇 |
排序方式: 共有10000条查询结果,搜索用时 671 毫秒
1.
2.
3.
Oliveira Flávio G. Tapisso Joaquim T. von Merten Sophie Rychlik Leszek Fonseca Paulo J. Mathias Maria da Luz 《Urban Ecosystems》2021,24(5):851-862
Urban Ecosystems - The development of urban areas imposes challenges that wildlife must adapt to in order to persist in these new habitats. One of the greatest changes brought by urbanization has... 相似文献
4.
Theory and Society - The massive expansion of US higher education after World War II is a sociological puzzle: a spectacular feat of state capacity-building in a highly federated polity. Prior... 相似文献
5.
Aldaba Fernando T. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2002,13(2):179-192
This paper discusses an emerging role for Philippine NGOs—building and maintaining intersectoral cooperation among various sectors of society to tackle key issues like agricultural development, HIV/AIDS, and agrarian reform. The three case studies elaborated in the paper show that Philippine NGOs play important intermediary and bridging functions crucial for the success of multistakeholder partnerships. NGOs are well equipped for this because of their middle-class and professional nature and because of various characteristics like autonomy, flexibility, and the ability to mobilize resources. 相似文献
6.
T. S. Ferguson 《Statistical Papers》1995,36(1):31-40
A class of symmetric bivariate uniform distributions is proposed for use in statistical modeling. The distributions may be
constructed to be absolutely continuous with correlations as close to±1 as desired. Expressions for the correlations, regressions
and copulas are found. An extension to three dimensions is proposed. 相似文献
7.
Politics and Scientific Expertise: Scientists, Risk Perception, and Nuclear Waste Policy 总被引:2,自引:0,他引:2
To study the homogeneity and influences on scientists'perspectives of environmental risks, we have examined similarities and differences in risk perceptions, particularly regarding nuclear wastes, and policy preferences among 1011 scientists and engineers. We found significant differences ( p 0.05)in the patterns of beliefs among scientists from different fields of research. In contrast to physicists, chemists, and engineers, life scientists tend to: (a)perceive the greatest risks from nuclear energy and nuclear waste management; (b)perceive higher levels of overall environmental risk; (c)strongly oppose imposing risks on unconsenting individuals; and (d)prefer stronger requirements for environmental management. On some issues related to priorities among public problems and calls for government action, there are significant variations among life scientists or physical scientists. We also found that–independently of field of research–perceptions of risk and its correlates are significantly associated with the type of institution in which the scientist is employed. Scientists in universities or state and local governments tend to see the risks of nuclear energy and wastes as greater than scientists who work as business consultants, for federal organizations, or for private research laboratories. Significant differences also are found in priority given to environmental risks, the perceived proximity of environmental disaster, willingness to impose risks on an unconsenting population, and the necessity of accepting risks and sacrifices. 相似文献
8.
Sandra G. Turner Carol P. Kaplan Luis Zayas Ruth E. Ross 《Child and Adolescent Social Work Journal》2002,19(5):357-374
Epidemiological data show high rates of suicide attempts among adolescent Latinas. Few studies have addressed the psychosocial, cultural and family correlates of suicide attempts among this age group of a rapidly growing population. The authors studied 31 adolescent Hispanic females who were receiving mental health services; 14 girls had attempted suicide in the previous five years and 17 had never attempted suicide. The two groups of girls did not differ significantly with respect to demographic profiles, levels of depression, family type, acculturation, or self-esteem. However, as hypothesized, the mutuality between girls and their mothers was lower among suicide attempters. Maladaptive coping skills of withdrawal and wishful thinking were more commonly used by attempters, and non-attempters used emotional regulation and problem-solving more frequently. Findings are discussed within the context of the empirical and theoretical literature and implications for practice are considered. 相似文献
9.
Abstract In recent years, church burnings in the South have attracted a great deal of attention. Many commentators have charged that they are a product of strained race relations throughout the South, and particularly of severe racial tensions in Southern rural areas. In this study we evaluate these claims. We begin by mapping the spatial coordinates of recorded church burnings from 1990 to 1997, and find that church arsons indeed are concentrated in the South. Church burnings, however, are a more urban phenomenon than popular media accounts would suggest. Our analysis then explores the influence of contextual factors (population and locale, racial composition and inequality, so‐cioeconomic conditions, local religious ecology, and patterns of reported crime) on church burnings in counties located in the study region. Logistic regression models confirm that church arsons are most likely to occur in small metropolitan statistical areas (MSAs) and non‐MSA counties containing a city of at least 10,000 residents. Church burnings also are especially likely in counties with a higher percentage of black residents, a larger number of churches relative to the rest of the state, and a higher arson rate. We conclude by discussing the implications of these findings for future research and public policy. 相似文献
10.