全文获取类型
收费全文 | 5975篇 |
免费 | 126篇 |
专业分类
管理学 | 790篇 |
民族学 | 17篇 |
人才学 | 6篇 |
人口学 | 592篇 |
丛书文集 | 22篇 |
理论方法论 | 521篇 |
综合类 | 69篇 |
社会学 | 2830篇 |
统计学 | 1254篇 |
出版年
2023年 | 35篇 |
2021年 | 40篇 |
2020年 | 82篇 |
2019年 | 117篇 |
2018年 | 128篇 |
2017年 | 203篇 |
2016年 | 132篇 |
2015年 | 100篇 |
2014年 | 117篇 |
2013年 | 996篇 |
2012年 | 217篇 |
2011年 | 162篇 |
2010年 | 118篇 |
2009年 | 115篇 |
2008年 | 140篇 |
2007年 | 153篇 |
2006年 | 142篇 |
2005年 | 134篇 |
2004年 | 131篇 |
2003年 | 95篇 |
2002年 | 128篇 |
2001年 | 143篇 |
2000年 | 121篇 |
1999年 | 136篇 |
1998年 | 114篇 |
1997年 | 114篇 |
1996年 | 81篇 |
1995年 | 84篇 |
1994年 | 98篇 |
1993年 | 87篇 |
1992年 | 101篇 |
1991年 | 81篇 |
1990年 | 90篇 |
1989年 | 88篇 |
1988年 | 100篇 |
1987年 | 88篇 |
1986年 | 78篇 |
1985年 | 90篇 |
1984年 | 71篇 |
1983年 | 74篇 |
1982年 | 68篇 |
1981年 | 64篇 |
1980年 | 60篇 |
1979年 | 76篇 |
1978年 | 62篇 |
1977年 | 49篇 |
1976年 | 60篇 |
1975年 | 57篇 |
1974年 | 35篇 |
1973年 | 38篇 |
排序方式: 共有6101条查询结果,搜索用时 31 毫秒
31.
Luis F. B. Plascencia Gary P. Freeman Mark Setzler 《The International migration review》2003,37(1):5-23
State governments exercise significant powers to regulate the economic and social activities of resident aliens. We review the laws of the six leading states of immigrant settlement regulating access of noncitizens to 23 occupations, updating existing studies from 1946–77. Citizenship requirements for these occupations have plummeted, a change we attribute to federal court decisions, advisory opinions of state attorneys general, and state legislative and administrative action. There are numerous additional citizenship requirements in the statutes of the six states, although these appear to be poorly enforced. The authority of states to regulate their political communities is the most important remaining constitutionally valid basis of citizenship requirements. States define their political community broadly, leading to questionable exclusions of noncitizens from important activities. 相似文献
32.
Many proposed methods for analyzing clustered ordinal data focus on the regression model and consider the association structure within a cluster as a nuisance. However, the association structure is often of equal interest—for example, temporal association in longitudinal studies and association between responses to similar questions in a survey. We discuss the use, appropriateness, and interpretability of various latent variable and Markov models for the association structure and propose a new structure that exploits the ordinality of the response. The models are illustrated with a study concerning opinions regarding government spending and an analysis of stability and change in teenage marijuana use over time, where we reveal different behavioral patterns for boys and girls through a comprehensive investigation of individual response profiles. 相似文献
33.
Martin F. Manalansan 《The International migration review》2006,40(1):224-249
This essay examines the historical and theoretical development of sexuality in migration research. Noting gaps and omissions in the literature, the essay proposes a dual notion of sexuality including one that is produced by the intersection of other social identities such as class and race, and a queer studies‐derived idea of the sexual that goes against the normalizing of heterosexual institutions and practices. Utilizing a case study of Filipina migrant workers, the essay demonstrates the pivotal role of sexuality in the future of gender and migration research through a critique of the implicit normative assumptions around family, heterosexual reproduction, and marriage that abound in this body of literature, and how a critical notion of sexuality enables a more inclusive and accurate portrait of global gendered migration. 相似文献
34.
Janet F. Werker Christopher T. Fennell Kathleen M. Corcoran Christine L. Stager 《Infancy》2002,3(1):1-30
What do novice word learners know about the sound of words? Word‐learning tasks suggest that young infants (14 months old) confuse similar‐sounding words, whereas mispronunciation detection tasks suggest that slightly older infants (18–24 months old) correctly distinguish similar words. Here we explore whether the difficulty at 14 months stems from infants' novice status as word learners or whether it is inherent in the task demands of learning new words. Results from 3 experiments support a developmental explanation. In Experiment 1, infants of 20 months learned to pair 2 phonetically similar words to 2 different objects under precisely the same conditions that infants of 14 months (Experiment 2) failed. In Experiment 3, infants of 17 months showed intermediate, but still successful, performance in the task. Vocabulary size predicted word‐learning performance, but only in the younger, less experienced word learners. The implications of these results for theories of word learning and lexical representation are discussed. 相似文献
35.
The Hohokam of southern Arizona are noted for greater duration of settlement than other major agricultural traditions in the archaeological record of the southwestern United States, including the Anasazi and Mogollon. The 40,000 square mile area inhabited by the Hohokam is marked by low elevation desert basins, but encompasses a range of topographic and climatic variability that shaped opportunities for prehistoric farming technologies. Irrigation from rivers was frequently associated with the longterm persistence of individual sites, while floodwater farming along ephemeral drainages was more often correlated with continuous occupation of hydrologically favored zones. Renewal of fields by waterborne nutrients and efficient practices in the use of natural resources countered the limited mobility options afforded by the Hohokam environment.In spite of a restrictive agricultural setting and an essentially static suite of productive technologies over many centuries, relationships among population, settlement, and landuse were redefined in evolving social and economic configurations. An example from the Tucson Basin illustrates differentiated patterns of settlement and agriculture arising in conjunction with increased levels of population and territorial integration in the late prehistoric period. Community organization among interrelated settlements incorporated a diversity of topographic zones and agricultural technologies in this high-risk context for prehistoric cultivators. 相似文献
36.
37.
Allan F. Abrahamse Peter A. Morrison Nancy Minter Bolton 《Population research and policy review》1994,13(4):383-398
Surname analysis is a potentially useful technique for identifying members of particular racial, ethnic, or language communities within a population. We review the existing state of the art for identifying persons of Hispanic or Asian origin, based on surnames distinctive of each group. We describe the logic of surname analysis, profile several available surname dictionaries, and illustrate their applications in local redistricting. Results of our ongoing validation studies suggest promising future directions for improving accuracy and broadening applications.This article is based on a paper presented at the annual Population Association of America meetings at Cincinnati, 1 April 1993. 相似文献
38.
39.
Feng Chen Richard M. Huggins Paul S. F. Yip K. F. Lam 《Journal of the Royal Statistical Society. Series C, Applied statistics》2008,57(4):447-459
Summary. The system for monitoring suicides in Hong Kong has considerable delays in reporting as the cause of death needs to be determined by a coroner's investigation. However, timely estimates of suicide rates are desirable to assist in the formulation of public health policies. This motivated us to develop a non-parametric procedure to estimate the intensity function of a Poisson process in the presence of reporting delays. We give closed form estimators of the Poisson intensity and the delay distribution, conduct simulation studies to evaluate the method proposed and derive their asymptotic properties. The method proposed is applied to estimate the intensity of suicide in Hong Kong. 相似文献
40.