全文获取类型
收费全文 | 114749篇 |
免费 | 3764篇 |
国内免费 | 196篇 |
专业分类
管理学 | 13549篇 |
劳动科学 | 55篇 |
民族学 | 1198篇 |
人才学 | 47篇 |
人口学 | 7559篇 |
丛书文集 | 6171篇 |
理论方法论 | 10689篇 |
综合类 | 15008篇 |
社会学 | 44337篇 |
统计学 | 20096篇 |
出版年
2023年 | 596篇 |
2022年 | 603篇 |
2021年 | 931篇 |
2020年 | 1792篇 |
2019年 | 2430篇 |
2018年 | 2442篇 |
2017年 | 3680篇 |
2016年 | 2781篇 |
2015年 | 2717篇 |
2014年 | 3503篇 |
2013年 | 20042篇 |
2012年 | 3786篇 |
2011年 | 3903篇 |
2010年 | 3740篇 |
2009年 | 3975篇 |
2008年 | 3841篇 |
2007年 | 3787篇 |
2006年 | 3967篇 |
2005年 | 3882篇 |
2004年 | 3135篇 |
2003年 | 2692篇 |
2002年 | 3030篇 |
2001年 | 2914篇 |
2000年 | 2363篇 |
1999年 | 2072篇 |
1998年 | 1705篇 |
1997年 | 1546篇 |
1996年 | 1510篇 |
1995年 | 1467篇 |
1994年 | 1423篇 |
1993年 | 1380篇 |
1992年 | 1393篇 |
1991年 | 1317篇 |
1990年 | 1249篇 |
1989年 | 1101篇 |
1988年 | 1183篇 |
1987年 | 1036篇 |
1986年 | 928篇 |
1985年 | 1100篇 |
1984年 | 1157篇 |
1983年 | 1036篇 |
1982年 | 962篇 |
1981年 | 871篇 |
1980年 | 833篇 |
1979年 | 882篇 |
1978年 | 780篇 |
1977年 | 695篇 |
1976年 | 655篇 |
1975年 | 638篇 |
1974年 | 525篇 |
排序方式: 共有10000条查询结果,搜索用时 531 毫秒
981.
The latest advances in artificial intelligence software (neural networking) have finally made it possible for qualitative researchers to apply the grounded theory method to the study of complex quantitative databases in a manner consistent with the postpositivistic, neopragmatic assumptions of most symbolic interactionists. The strength of neural networking for the study of quantitative data is twofold: it blurs the boundaries between qualitative and quantitative analysis, and it allows grounded theorists to embrace the complexity of quantitative data. The specific technique most useful to grounded theory is the Self‐Organizing Map (SOM). To demonstrate the utility of the SOM we (1) provide a brief review of grounded theory, focusing on how it was originally intended as a comparative method applicable to both quantitative and qualitative data; (2) examine how the SOM is compatible with the traditional techniques of grounded theory; and (3) demonstrate how the SOM assists grounded theory by applying it to an example based on our research. 相似文献
982.
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
983.
984.
U. Hassler 《Statistical Papers》1994,35(1):1-16
In case of a random walk the theoretical autocorrelations tend to one asymptotically. The sample autocorrelations, however,
may decline rather fast even with large samples. We will explain this observation by deriving the asymptotic distribution
that turns out to be closely related to the Dickey-Fuller (1979) distribution. Moreover we discuss the behaviour of the sample
autocorrelations of integrated MA(1) and AR(1) processes. In order to prove our results we consider more general I(1) processes
and apply the functional central limit theorem injected to time series analysis by Phillips (1987). We obtain unit root tests
that are based on autocorrelation estimators of higher lags. We discuss their finite sample behaviour experimentally. 相似文献
985.
A distinction is made between the cohesive self and the nuclear self. The latter represents a consolidation of the self that occurs in late adolescence and that results from the integration of life goals and ambitions into a coherent narrative. This paper presents a case in which a pseudo-consolidation appears to have occurred in an adolescent with an undiagnosed learning disability.Ms. Silbar is in private practice. 相似文献
986.
关于经济效益及其指标体系的思考李世聪一、经济效益的综合含义众所周知,经济效益指的是“产出”与“投入”之间的关系,即一定的生产经营成果与取得它所需的劳动消耗之间的对比关系。这里所说的劳动消耗不应包括劳动占用,因劳动消耗是从劳动占用中转化过来的,不能重复... 相似文献
987.
试析黑龙江与日本的经济合作 总被引:1,自引:0,他引:1
黑龙江与日本的经济技术合作发展平稳 ,由于商品结构不合理、贸易不平衡、利用日资数量少等因素影响 ,近期双方的合作不会有大的突破 ;有合作发展前途的领域有 :技术、加工、金融等领域 ;今后 ,要充分利用中介机构、行业团体及我省高科技开发区的优惠政策调整双方合作格局 ;要在规范劳动保险制度、培养高级管理人才、共同确立合作项目上有新的突破 相似文献
988.
VXIbus自动测试系统的研究 总被引:2,自引:0,他引:2
VXIbus(VMEbus Extcnsions for Instrumcntation)是继GPIB接口之后,在PC机广泛应用的基础上,融合了VMEbus(VERSA-bus Modular Europcan)和GPIB而产生的新一代仪器总线。本文讨论了怎样在GPIB环境下采用VXIbus标准组建新型的自动测试系统,并结合VXIB1数据采集实验系统的设计实践,探讨了选用VXIbus标准需要解决的有关技术问题。 相似文献
989.
990.
Abstract Despite a high prevalence of poverty among minorities in nonmetropolitan areas, research and policy concerns regarding poverty have continued focusing on metropolitan minorities. This study uses a model integrating individual, household, and structural factors to examine poverty among Latinos, blacks, and Anglos in nonmetropolitan and, for comparative purposes, metropolitan areas, using data from the 1985 Special Texas Census TDHS 1987. The findings show that minorities in nonmetropolitan areas tend to have the highest poverty rates. In addition, consistent as well as divergent patterns exist among the six ethnic-resident groups with respect to the relationships among the various individual, household, and structural factors and poverty. 相似文献