首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1282篇
  免费   93篇
各国政治   98篇
工人农民   61篇
世界政治   110篇
外交国际关系   122篇
法律   544篇
中国政治   4篇
政治理论   432篇
综合类   4篇
  2023年   13篇
  2022年   12篇
  2021年   15篇
  2020年   42篇
  2019年   51篇
  2018年   72篇
  2017年   82篇
  2016年   88篇
  2015年   43篇
  2014年   69篇
  2013年   228篇
  2012年   46篇
  2011年   51篇
  2010年   47篇
  2009年   58篇
  2008年   48篇
  2007年   50篇
  2006年   34篇
  2005年   36篇
  2004年   35篇
  2003年   37篇
  2002年   38篇
  2001年   21篇
  2000年   22篇
  1999年   16篇
  1998年   11篇
  1997年   14篇
  1996年   6篇
  1995年   7篇
  1994年   5篇
  1993年   9篇
  1992年   6篇
  1991年   2篇
  1990年   2篇
  1989年   3篇
  1988年   4篇
  1987年   9篇
  1986年   3篇
  1985年   4篇
  1984年   4篇
  1983年   3篇
  1982年   5篇
  1980年   3篇
  1979年   3篇
  1978年   4篇
  1977年   3篇
  1974年   3篇
  1973年   2篇
  1971年   2篇
  1970年   1篇
排序方式: 共有1375条查询结果,搜索用时 15 毫秒
61.
62.
63.
Abstract

You did it. You successfully worked with a wireless service provider to find the ideal spot for its new wireless tower. The tower is positioned perfectly—in the heart of downtown, yet safe, hidden, completely undisruptive. The provider is happy. The community is content. It’s a win‐win. Fast forward a month. The provider is back with a new idea: To support the latest technology and to enhance its revenues, it will add not one, but four 20‐foot extensions for new antennas. The extensions would make the otherwise hidden facility visible. They would reach across and over the sidewalk and street, presenting safety risks. And the provider would also add four new equipment cabinets and an equipment shelter. Your answer is easy: Absolutely not. We can find a better solution. But this time the provider is not asking, it’s demanding. It says that because it is not proposing an initial facility but a colocation, you must approve its requests. Whether the provider is correct may turn on how the Federal Communications Commission (FCC) resolves a pending rule making. This article describes the proceeding, key issues it raises, and what the proceeding may mean to you and your community. As a planner, you can influence the proceeding by meeting with the FCC to discuss the proposed rules and by responding to industry claims that local requirements are delaying deployment.  相似文献   
64.
65.
66.
Aerial bombardment has been an important component of counterinsurgency practice since shortly after it became a viable military technology in the early twentieth century. Due to the nature of insurgency, bombing frequently occurs in and around settled areas, and consequently it tends to generate many civilian casualties. However, the effectiveness of bombing civilian areas as a military tactic remains disputed. Using data disaggregated to the level of the smallest population unit and measured at multiple points in time, this article examines the effect of aerial bombardment on the pattern of local control in the Vietnam War. A variety of estimation methods, including instrumental variables and genetic matching, show that bombing civilians systematically shifted control in favor of the Viet Cong insurgents.  相似文献   
67.
68.
Hard Core is initially a historical study showing how the sexual explicitness of hardcore is located within cinema's initial promise of the visually real. The book is informed by a Foucauldian perspective on this 'will to truth; but also utilizes psychoanalytic and Marxist concepts of fetishsm and its discussion of the main hardcore films is through genre.Its aim is to show how a seemingly male-oriented discourse actually exhibits ambiguities and polymorphously perverse pleasures, therefore making it possible for women to gain some erotic purchase on pornography. However, there are a number of problems with this analysis; In its use of foucault, which promises a setting of pornography in more of a socio-political formation than is given: in the arguments on truth and fetishism, in the treatment of hardcore as a genre, which uses a restricted body of films to make a more general argument. A deeper attention to the institutional and social settings of varieties of pornography is therefore needed to give a more nuanced picture.  相似文献   
69.
Government policies sometimes cause unintended consequences for other potentially desirable behaviors. One such policy is the charitable tax deduction, which encourages charitable giving by allowing individuals to deduct giving from taxable income. Whether charitable giving and other desirable behaviors are complements or substitutes affect the welfare benefit of the deduction—complements increase the benefit, while substitutes decrease the benefit. This paper focuses on the effect of the deduction on one behavior in particular: religious attendance. Using data from the Independent Sector Survey of Giving and Volunteering, I estimate a tax price elasticity for religious attendance of ?0.4, which implies that charitable giving and religious attendance are complements. I resolve the difference between my estimate and a recent estimate by W. S. Gruber (2004) that implies charitable giving and religious attendance are substitutes. While Gruber imputes itemization status, an important factor in calculating tax incentives, I use survey‐reported itemization status. This imputation creates a large amount of non‐classical measurement error. I show that the measurement error is responsible for the disparate results: If I also impute itemization status, I obtain similar results as Gruber.  相似文献   
70.
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   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号