全文获取类型
收费全文 | 15977篇 |
免费 | 322篇 |
国内免费 | 2篇 |
专业分类
管理学 | 2382篇 |
民族学 | 103篇 |
人才学 | 4篇 |
人口学 | 1389篇 |
丛书文集 | 92篇 |
理论方法论 | 1699篇 |
综合类 | 292篇 |
社会学 | 8078篇 |
统计学 | 2262篇 |
出版年
2023年 | 92篇 |
2021年 | 92篇 |
2020年 | 254篇 |
2019年 | 412篇 |
2018年 | 415篇 |
2017年 | 594篇 |
2016年 | 414篇 |
2015年 | 345篇 |
2014年 | 407篇 |
2013年 | 2575篇 |
2012年 | 555篇 |
2011年 | 590篇 |
2010年 | 435篇 |
2009年 | 405篇 |
2008年 | 417篇 |
2007年 | 492篇 |
2006年 | 427篇 |
2005年 | 412篇 |
2004年 | 402篇 |
2003年 | 307篇 |
2002年 | 362篇 |
2001年 | 398篇 |
2000年 | 324篇 |
1999年 | 301篇 |
1998年 | 234篇 |
1997年 | 222篇 |
1996年 | 212篇 |
1995年 | 196篇 |
1994年 | 195篇 |
1993年 | 207篇 |
1992年 | 204篇 |
1991年 | 198篇 |
1990年 | 203篇 |
1989年 | 200篇 |
1988年 | 186篇 |
1987年 | 184篇 |
1986年 | 160篇 |
1985年 | 177篇 |
1984年 | 206篇 |
1983年 | 178篇 |
1982年 | 169篇 |
1981年 | 128篇 |
1980年 | 153篇 |
1979年 | 148篇 |
1978年 | 127篇 |
1977年 | 104篇 |
1976年 | 109篇 |
1975年 | 121篇 |
1974年 | 108篇 |
1973年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
C. Eddie Palmer E. Joseph Savoie 《Sociological Practice: A Journal of Clinical and Applied Sociology》2002,4(1):89-97
Service-learning programs are not free from challenges brought about by lack of financial support, lack of widespread commitment from professors, community agencies, and recipients of service, and lack of knowledge and insight in students directly involved in such programs. While service-learning initiatives and programs serve positive functions for organizations and individuals, rhetorical accolades for service learning can distort or omit the realities of program implementation and sustained delivery. This paper specifically explores the following challenges connected to service-learning programs: (1) pedagogical difficulties; (2) student limitations; (3) time constraints; and (4) community cooperation. 相似文献
14.
Michael P. Fay Ji-Hyun Lee 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2006,169(1):81-96
Summary. We detail a general method for measuring agreement between two statistics. An application is two ratios of directly standardized rates which differ only by the choice of the standard. If the statistics have a high value for the coefficient of agreement then the expected squared difference between the statistics is small relative to the variance of the average of the two statistics, and inferences vary little by changing statistics. The estimation of a coefficient of agreement between two statistics is not straightforward because there is only one pair of observed values, each statistic calculated from the data. We introduce estimators of the coefficient of agreement for two statistics and discuss their use, especially as applied to functions of standardized rates. 相似文献
15.
Michael V. Tidwell 《Nonprofit management & leadership》2005,15(4):449-467
This study draws on social identity theory, while developing and testing the Social Identification Model of Prosocial Behavior among voluntary participants in nonprofit organizations. This model posits relationships between organization identification, commitment, satisfaction, and prosocial behavior among nonprofit volunteers. Path analysis results indicate successful identification of the model. Specifically, when volunteers identified with their nonprofit, they had higher levels of prosocial behaviors, commitment, and satisfaction. This study provides several important extensions to social identity theory and nonprofit literatures while highlighting the need for further research examining motivations behind prosocial behaviors within nonprofits. 相似文献
16.
The Analysis of Verbal Behavior - 相似文献
17.
18.
19.
Objective. The risk compensation hypothesis suggests that drivers enjoying greater safety will drive more recklessly and thereby impose greater risks on nonoccupants. We provide a test of the risk compensation hypothesis in the context of state seatbelt laws and belt use rates. Methods. Fixed‐effects models with policy and demographic variables are estimated using annual state data from 1985 to 2002 to test the effect of seatbelt laws and seatbelt use rates on logged fatality rates for occupants, pedestrians, motorcyclists, and all nonoccupants in separate models. Results. Contrary to the risk compensation hypothesis, the results indicate that both occupants and nonoccupants enjoy greater safety due to state mandatory use laws and increased safety belt use rates. Conclusion. Overall, seatbelt laws and the higher belt use these laws induce do not increase nonoccupant risk exposure. If anything, these laws and the accompanying increase in belt use result in safer driving behavior. 相似文献
20.
We describe a risk-based analytical framework for estimating traffic fatalities that combines the probability of a crash and the probability of fatality in the event of a crash. As an illustrative application, we use the methodology to explore the role of vehicle mix and vehicle prevalence on long-run fatality trends for a range of transportation growth scenarios that may be relevant to developing societies. We assume crash rates between different road users are proportional to their roadway use and estimate case fatality ratios (CFRs) for the different vehicle-vehicle and vehicle-pedestrian combinations. We find that in the absence of road safety interventions, the historical trend of initially rising and then falling fatalities observed in industrialized nations occurred only if motorization was through car ownership. In all other cases studied (scenarios dominated by scooter use, bus use, and mixed use), traffic fatalities rose monotonically. Fatalities per vehicle had a falling trend similar to that observed in historical data from industrialized nations. Regional adaptations of the model validated with local data can be used to evaluate the impacts of transportation planning and safety interventions, such as helmets, seat belts, and enforcement of traffic laws, on traffic fatalities. 相似文献