全文获取类型
收费全文 | 6657篇 |
免费 | 199篇 |
专业分类
各国政治 | 338篇 |
工人农民 | 215篇 |
世界政治 | 523篇 |
外交国际关系 | 233篇 |
法律 | 3959篇 |
中国政治 | 38篇 |
政治理论 | 1484篇 |
综合类 | 66篇 |
出版年
2020年 | 74篇 |
2019年 | 98篇 |
2018年 | 142篇 |
2017年 | 132篇 |
2016年 | 134篇 |
2015年 | 100篇 |
2014年 | 107篇 |
2013年 | 717篇 |
2012年 | 140篇 |
2011年 | 157篇 |
2010年 | 147篇 |
2009年 | 149篇 |
2008年 | 156篇 |
2007年 | 155篇 |
2006年 | 176篇 |
2005年 | 154篇 |
2004年 | 145篇 |
2003年 | 157篇 |
2002年 | 148篇 |
2001年 | 214篇 |
2000年 | 176篇 |
1999年 | 158篇 |
1998年 | 97篇 |
1997年 | 91篇 |
1996年 | 68篇 |
1995年 | 75篇 |
1994年 | 73篇 |
1993年 | 81篇 |
1992年 | 116篇 |
1991年 | 149篇 |
1990年 | 128篇 |
1989年 | 143篇 |
1988年 | 129篇 |
1987年 | 150篇 |
1986年 | 138篇 |
1985年 | 146篇 |
1984年 | 134篇 |
1983年 | 137篇 |
1982年 | 100篇 |
1981年 | 94篇 |
1980年 | 89篇 |
1979年 | 94篇 |
1978年 | 75篇 |
1977年 | 58篇 |
1976年 | 66篇 |
1975年 | 61篇 |
1974年 | 69篇 |
1973年 | 67篇 |
1972年 | 55篇 |
1969年 | 56篇 |
排序方式: 共有6856条查询结果,搜索用时 15 毫秒
241.
Public Choice - This paper studies the practice of Müsadere in the Ottoman Empire. Müsadere refers to the expropriation of elites—often tax farmers or administrators—by the... 相似文献
242.
243.
The necessity of rapid objective appraisal of the suspicion of intracorporeal drug smuggling (body-packing) by effective methods of investigation in the course of the first criminal investigation department measures raises the questions of suitable and admissible methods. The proportion of undetected crimes in intracorporeal narcotic smuggling must be rated as very high according to the data of the Federal Criminal Investigation Department. In the present paper, the suitability of various imaging techniques for drug detection are reported in terms of their risk, practicability and costs. For this purpose, the value of digital radiography, two-spectra radiography and X-ray computer tomography as compared to conventional X-ray investigations is examined in human experiments. A reality-oriented narcotics dummy (glucose pressed hard in preservative) was developed and administered to nine volunteers per os with a variable initial alimentary situation. Four radiograms were taken at fixed times up to 12 hours after administration with each imaging technique. The highest rate of detection was attained with computer tomography. In contrast to the other methods, more than 90% of the body packs could be identified here. Nevertheless, an application in criminal investigation practice cannot be recommended owing to various disadvantages. The recovery rate of the remaining methods is between 20% and 25%. 相似文献
244.
David B. Estell Thomas W. Farmer Matthew J. Irvin Jana H. Thompson Bryan C. Hutchins Erin M. McDonough 《Journal of youth and adolescence》2007,36(4):477-487
The transition to high school has been identified as a potentially difficult time in adolescents’ lives. Reductions in both
academic and social functioning often accompany this transition. While these effects have been documented in urban youth,
the move to high school has not been extensively studied in rural minority youth. Toward that end, the academic grades and
substance use in ninth grade of 447 (184 male and 263 female) African-American adolescents from two rural counties in a state
in the deep South were examined in relation to configurations of adaptation from sixth through eighth grade. Results indicate
that individual with consistently positive patterns across middle school had higher grades and lower rates of substance use
compared to individuals with persistent difficulties or those that transitioned to problem behavior. Many individuals who
improved in their patterns of adaptation had relatively high grades, but also rather high rates of substance use in the ninth
grade.
David B. Estell is an assistant professor of educational psychology at Indiana University Bloomington. He received his PhD
in Developmental Psychology from the University of North Carolina at Chapel Hill. His major research interests include peer
relations and the development of aggression.
Thomas W. Farmer is an associate professor of education at Pennsylvania State University and director of the National Research
Center on Rural Education Support. He received his PhD in Special Education from University of North Carolina at Chapel Hill.
His major research interests include peer relations and the development of aggression in students with and without special
needs.
Matthew J. Irvin is a research scientist at the Center for Developmental Science at the University of North Carolina at Chapel
Hill. He received his PhD in Educational Psychology from the University of North Carolina at Chapel Hill. His major research
interests include resilience and student engagement.
Jana H. Thompson is a research associate at the Center for Developmental Science at the University of North Carolina at Chapel
Hill. Her research interests include peer social relations and developmental transitions into early adolescence.
Bryan C. Hutchins is a research assistant at the Center for Developmental Science at the University of North Carolina at Chapel
Hill. He is also a graduate student in the Educational Psychology, Measurement, and Evaluation Program at UNC. His research
interests include child and adolescent social development and school based emotional and behavioral interventions and prevention
programs.
Erin M. McDonough is currently a doctoral candidate in School Psychology at the University of North Carolina at Chapel Hill.
She received her Bachelor of Arts degree in Psychology from Emory University. As a research assistant at the Center for Developmental
Science, she has been able to explore her interests in student achievement as well as rural education. Another major research
interest of hers is school-based mental health. 相似文献
245.
This paper investigates persuasion as a means of influence for the Federal Reserve Chairman in meetings of the Federal Open Market Committee (FOMC). Using textual records of FOMC meetings, federal funds rate targets have been recorded for Committee members who served in the Arthur Burns era (1970–1978). Results show that Burns-member differences in stated funds rate targets were lower when Burns made recommendations early in the meeting, consistent with the hypothesis that the Chairman is persuasive. Additional results show that members’ tendencies to respond to Burns's recommendations were related to their personal and political loyalties. 相似文献
246.
247.
David W. Nickerson 《American journal of political science》2007,51(2):269-282
Campaigns rely upon both paid and volunteer phone calls to mobilize voters. Past field experiments show calls from volunteers to increase turnout and paid calls to be wholly ineffective. This article argues that the quality of phone calls rather than the presence or absence of a payroll explains this regularity. Three aspects of quality are considered: monitoring pace and interactivity, timing, and message. A fully randomized field experiment with over 100,000 subjects comparing professional and volunteer phone banks simultaneously was conducted during the 2002 congressional elections to test this hypothesis. The experiment discovers precisely the opposite relationship of prior research: effective professional phone banks and inefficient volunteer phone calls. The experiment also finds substantial temporal decay. The specific messages appear less important than tone or timing. The implications for the role of campaign consultants, replacing social capital, voter psychology, and the capacities of civic organizations are discussed. 相似文献
248.
We investigate how aspects of "civil service" systems of personnel management interact with bureaucratic discretion to create expert bureaucracies populated by policy-motivated agents. We construct a dynamic model in which bureaucrats may invest in (relationship-specific) policy expertise and may or may not be interested in policy choices per se. The legislature makes sequentially rational grants of discretion, which serve as incentives for expertise investment and continued service only for policy-motivated bureaucrats. Bureaucratic policy preferences and the legislature's agency problem vis-à-vis bureaucracies develop endogenously in the model. Bureaucratic expertise can be supported in equilibrium only at a cost of its politicization; "neutral competence" is inconsistent with strategic incentives of bureaucrats. We identify several conditions that support the development of an expert bureaucracy in equilibrium, including security of job tenure and control over policy issues for policy-motivated bureaucrats. 相似文献
249.
Chris W. Bonneau Thomas H. Hammond Forrest Maltzman Paul J. Wahlbeck 《American journal of political science》2007,51(4):890-905
Some scholars argue that the author of the majority opinion exercises the most influence over the Court's opinion-writing process and so can determine what becomes Court policy, at least within the limits of what some Court majority finds acceptable. Other students of the Court have suggested that the Court's median justice effectively dictates the content of the majority opinion: whatever policy the median justice most wants, she can get. We test these competing models with data on Supreme Court decision making during the Burger Court (1969–86). While we find substantial evidence for both models, the agenda control model gains greater support. This suggests that opinions on the Court on each case are driven, in general, by the interaction of three key variables: the policy preferences of the majority opinion author, the policy preferences of the median justice, and the location of the legal status quo . 相似文献
250.