全文获取类型
收费全文 | 401篇 |
免费 | 37篇 |
专业分类
各国政治 | 29篇 |
工人农民 | 22篇 |
世界政治 | 60篇 |
外交国际关系 | 22篇 |
法律 | 181篇 |
中国政治 | 8篇 |
政治理论 | 110篇 |
综合类 | 6篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 8篇 |
2019年 | 6篇 |
2018年 | 15篇 |
2017年 | 30篇 |
2016年 | 18篇 |
2015年 | 16篇 |
2014年 | 16篇 |
2013年 | 64篇 |
2012年 | 6篇 |
2011年 | 8篇 |
2010年 | 15篇 |
2009年 | 9篇 |
2008年 | 14篇 |
2007年 | 8篇 |
2006年 | 18篇 |
2005年 | 10篇 |
2004年 | 10篇 |
2003年 | 12篇 |
2002年 | 8篇 |
2001年 | 4篇 |
2000年 | 8篇 |
1999年 | 10篇 |
1998年 | 11篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1994年 | 8篇 |
1993年 | 8篇 |
1992年 | 10篇 |
1991年 | 8篇 |
1990年 | 7篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 7篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1979年 | 6篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1971年 | 1篇 |
1970年 | 2篇 |
1969年 | 1篇 |
1968年 | 2篇 |
1956年 | 2篇 |
1955年 | 1篇 |
排序方式: 共有438条查询结果,搜索用时 15 毫秒
151.
152.
Cynthia A. Roberts 《欧亚研究》1995,47(8):1293-1326
153.
154.
155.
By examining data from fifteen Latin American nations on several agricultural- and food-related variables for 1965 to 1977, this paper analyzes the efficacy of the Green Revolution for food consumption. A Radical Model is offered to explain why a high technology, export-oriented, agricultural policy may not adequately serve the food consumption needs of Third World countries. 相似文献
156.
Jason M. Roberts Jacob F. H. Smith Sarah A. Treul 《Journal of Elections, Public Opinion & Parties》2016,26(1):96-114
This paper examines the effects of the increased role of party organizations in the recruitment and funding of congressional candidates in the US House post-1994. The recent uncertainty over which party will gain majority control of the House has transformed the role of party organizations in House campaigns. Despite the new resources devoted to each competitive seat in the House we find minimal changes in the overall competitiveness of US House elections. Additionally, the vast majority of potentially competitive seats do not draw a high quality challenger. Our results suggest that if parties recruited more quality candidates in the full range of these conceivably winnable seats this effort could produce more competitive seats or more seat turnover in the House. 相似文献
157.
An Update on the Hazards and Risks of Forensic Anthropology,Part II: Field and Laboratory Considerations 下载免费PDF全文
Lindsey G. Roberts M.A. Gretchen R. Dabbs Ph.D. Jessica R. Spencer M.A. 《Journal of forensic sciences》2016,61(Z1):S14-S21
This paper focuses on potential hazards and risks to forensic anthropologists while working in the field and laboratory in North America. Much has changed since Galloway and Snodgrass published their seminal article addressing these issues. The increased number of forensic practitioners combined with new information about potential hazards calls for an updated review of these pathogens and chemicals. Discussion of pathogen hazards (Brucella, Borrelia burgdorferi, Yersinia pestis, Clostridium tetani and West Nile virus) includes important history, exposure routes, environmental survivability, early symptoms, treatments with corresponding morbidity and mortality rates, and decontamination measures. Additionally, data pertaining to the use of formaldehyde in the laboratory environment have resulted in updated safety regulations, and these are highlighted. These data should inform field and laboratory protocols. The hazards of working directly with human remains are discussed in a companion article, “An Update on the Hazards and Risks of Forensic Anthropology, Part I: Human Remains.” 相似文献
158.
Michael S. Lynch Anthony J. Madonna Jason M. Roberts 《Legislative Studies Quarterly》2016,41(3):633-655
All major legislation in the House necessitates a special rule from the Rules Committee before it can be brought to the chamber floor. These rules often strictly limit floor amendments to bills considered by the House. Scholars of political parties have argued that the House majority party can bias policy output away from the floor median through its usage of restrictive rules. In this article, we argue that in order to secure the passage of restrictive rules, the majority often makes concessions to centrist legislators through the amending process. We examine this theory using a newly collected data set that includes all amendments considered by the Rules Committee during the construction of structured rules in the 109th, 110th, and 111th Congresses (2005–2010). Our results are mixed, but they do suggest that moderate members of the majority party often receive concessions via amendments for their support of the majority party's agenda‐setting regime. 相似文献
159.
Dental Age Estimation: A Test of the Reliability of Correctly Identifying a Subject Over 18 Years of Age Using the Gold Standard of Chronological Age as the Comparator 下载免费PDF全文
Victoria S. Lucas Ph.D. Manoharan Andiappan M.Sc. Fraser McDonald Ph.D. Graham Roberts M.D.S. 《Journal of forensic sciences》2016,61(5):1238-1243
This study was designed to test the reliability of using the third molars to demarcate between child and adult status. A total of 2000 dental panoramic tomographs were used for assessment of the calculated age using the 8‐stage system of tooth development and applied to all four third molars. The LL8 was also assessed using this 8‐stage system. For each tooth development stage, the Normal distribution and percentile summary data were estimated. The calculated dental age compared with the chronological age was statistically significantly different (p < 0.001) for both females and males giving underestimates of the true age. Comparison of single tooth dental age and chronological age was only slightly different. The most important finding is that the assignment to above or below the 18‐year threshold, in the age range 17 years to 19 years, could be wrong on up to 50% of occasions. 相似文献
160.
Margaret E. Roberts Brandon M. Stewart Dustin Tingley Christopher Lucas Jetson Leder‐Luis Shana Kushner Gadarian Bethany Albertson David G. Rand 《American journal of political science》2014,58(4):1064-1082
Collection and especially analysis of open‐ended survey responses are relatively rare in the discipline and when conducted are almost exclusively done through human coding. We present an alternative, semiautomated approach, the structural topic model (STM) (Roberts, Stewart, and Airoldi 2013; Roberts et al. 2013), that draws on recent developments in machine learning based analysis of textual data. A crucial contribution of the method is that it incorporates information about the document, such as the author's gender, political affiliation, and treatment assignment (if an experimental study). This article focuses on how the STM is helpful for survey researchers and experimentalists. The STM makes analyzing open‐ended responses easier, more revealing, and capable of being used to estimate treatment effects. We illustrate these innovations with analysis of text from surveys and experiments. 相似文献