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   750篇
  免费   30篇
各国政治   27篇
工人农民   82篇
世界政治   74篇
外交国际关系   30篇
法律   374篇
中国政治   9篇
政治理论   175篇
综合类   9篇
  2023年   4篇
  2022年   2篇
  2021年   6篇
  2020年   8篇
  2019年   19篇
  2018年   29篇
  2017年   40篇
  2016年   36篇
  2015年   25篇
  2014年   17篇
  2013年   114篇
  2012年   20篇
  2011年   21篇
  2010年   32篇
  2009年   23篇
  2008年   32篇
  2007年   35篇
  2006年   33篇
  2005年   16篇
  2004年   31篇
  2003年   28篇
  2002年   21篇
  2001年   12篇
  2000年   17篇
  1999年   13篇
  1998年   13篇
  1997年   7篇
  1996年   7篇
  1995年   11篇
  1994年   6篇
  1993年   6篇
  1992年   11篇
  1991年   8篇
  1990年   5篇
  1989年   9篇
  1988年   2篇
  1987年   10篇
  1986年   4篇
  1985年   4篇
  1984年   5篇
  1983年   4篇
  1982年   3篇
  1981年   3篇
  1980年   2篇
  1979年   10篇
  1978年   5篇
  1974年   3篇
  1973年   3篇
  1969年   2篇
  1968年   1篇
排序方式: 共有780条查询结果,搜索用时 15 毫秒
181.
This report details findings from the nation's first statewide study on parenting coordination. A survey was presented to all known practicing parenting coordinators (PCs) in Florida (N = 207), with 67 (32%) responding. Data concerning PC demographics, how PCs do their work, and how they perceive their clients at different stages of the parenting coordination process suggest substantial similarity between mental health and family law professionals in almost every realm of questioning. Study limitations, implications for further research, and practice considerations are discussed.  相似文献   
182.
Kosuke Imai Department of Politics, Princeton University, Princeton, NJ 08544 e-mail: kimai{at}princeton.edu Gary King Department of Government, Harvard University, 1737 Cambridge Street, Cambridge, MA 02138 Elizabeth A. Stuart Departments of Mental Health and Biostatistics, Johns Hopkins Bloomberg School of Public Health, 624 North Broadway, Room 804, Baltimore, MD 21205 e-mail: estuart{at}jhsph.edu e-mail: king{at}harvard.edu (corresponding author) Although published works rarely include causal estimates frommore than a few model specifications, authors usually choosethe presented estimates from numerous trial runs readers neversee. Given the often large variation in estimates across choicesof control variables, functional forms, and other modeling assumptions,how can researchers ensure that the few estimates presentedare accurate or representative? How do readers know that publicationsare not merely demonstrations that it is possible to find aspecification that fits the author's favorite hypothesis? Andhow do we evaluate or even define statistical properties likeunbiasedness or mean squared error when no unique model or estimatoreven exists? Matching methods, which offer the promise of causalinference with fewer assumptions, constitute one possible wayforward, but crucial results in this fast-growing methodologicalliterature are often grossly misinterpreted. We explain howto avoid these misinterpretations and propose a unified approachthat makes it possible for researchers to preprocess data withmatching (such as with the easy-to-use software we offer) andthen to apply the best parametric techniques they would haveused anyway. This procedure makes parametric models producemore accurate and considerably less model-dependent causal inferences. Authors' note: Our thanks to Dan Carpenter and Jeff Koch fordata; Alberto Abadie, Neal Beck, Sam Cook, Alexis Diamond, BenHansen, Guido Imbens, Olivia Lau, Gabe Lenz, Paul Rosenbaum,Don Rubin, and Jas Sekhon for many helpful comments; and theNational Institutes of Aging (P01 AG17625-01), the NationalInstitute of Mental Health (MH066247), the National ScienceFoundation (SES-0318275, IIS-9874747, SES-0550873), and thePrinceton University Committee on Research in the Humanitiesand Social Sciences for research support. Software to implementthe methods in this paper is available at http://GKing.Harvard.edu/matchitand a replication data file is available as Ho et al. (2006).  相似文献   
183.
184.
dl-3,4-methylenedioxymethamphetamine (MDMA) and methamphetamine are commonly used illicit drugs that are thought to impair driving ability. The Standardized Field Sobriety Tests (SFSTs) are utilized widely to detect impairment associated with drugs other than alcohol in drivers, although limited evidence concerning MDMA and methamphetamine consumption on SFST performance exists. The aim of this study was to evaluate whether the SFSTs were a sensitive measure for identifying the presence of the specific isomer d-methamphetamine and MDMA. In a double-blind, within-subject, counter-balanced and placebo-controlled study, 58 healthy and abstinent recreational drugs users were administered three treatments: 100mg of MDMA, 0.42 mg/kg d-methamphetamine, and placebo. For each condition the SFSTs were administered at 4 and 25 h post treatment. d-methamphetamine was not found to significantly impair SFST performance unlike MDMA, which significantly impaired SFST performance in comparison to placebo with 22% of the sample failing the test at the 4h testing time-point. No differences were observed at the 25 h testing time-point for any of the conditions. It was concluded that the SFSTs are not efficient in identifying the presence of low level d-methamphetamine, and are significantly better at detecting the presence of MDMA at the levels assessed.  相似文献   
185.
In this article, we study how the configuration of a publicly promoted clusters policy??the Global Clusters policy initiated by the Walloon Government in Belgium??influenced the behaviors of R&D practitioners. At first, we explored the background of the Global Cluster policy in an effort to make the program configuration visible. This first step was conducted through the gathering and analysis of data from official documents as well as publications, conference speeches and workshops produced by policy makers, evaluators and their academic collaborators. Then, we observed the transmission of the six resulting features from the policy level to the project level: we studied their appropriation by R&D practitioners in ??Mirage??, an R&D project associated to the mechanical engineering Global Cluster. As a result, we show that the particularities of Walloon Global Clusters make them a powerful instrument to enhance collateral assets while facing potential lock-in. We finally consider the way these Global Clusters should evolve to favor the exploitation of the emerged outcomes while exploring future opportunities. A good balance between exploitation and exploration as well as adequate networking and clustering instruments to support both objectives appear necessary to ensure sustainability and growth of the involved actors.  相似文献   
186.
The present study examined the extent to which attentional control mediates the relationship between adverse early life experiences (e.g., harsh discipline, low perceived support) and child physical abuse (CPA) risk in adulthood. Participants included 138 general population parents (30.4% fathers and 69.6% mothers) who completed self-report measures of early life experiences, attentional control, and CPA risk. Results revealed that attentional control partially mediated the association between adverse early environment and CPA risk scores, Sobel test = 2.65, SE = 0.86, p = .007. More specifically, individuals exposed to adverse early environments (characterized by harsh discipline and/or low perceived support) reported lower levels of attentional control, which in turn was associated with increased risk of hostile, aggressive, and abusive parenting.  相似文献   
187.
We examine whether particular types of stress are related to particular types of crime or whether all types of stress are related to all types of crime. Our estimates are based on analyses of within-individual change over a 36 month period among recently incarcerated offenders. We find that assault is most strongly related to family stress, suggesting that conflicts between family members lead to assault. Economic crimes (property crimes and selling illicit drugs) are most clearly related to financial stress, suggesting that these crimes often reflect attempts to resolve financial problems. On the other hand, crime is generally unrelated to stress from illness/injury, death, and work. The results support the idea that criminal behavior is a focused response to specific types of problems rather than a general response to stress. They are more consistent with explanations that focus on perceived rewards and costs (e.g., the rational-choice approach) than with explanations that portray negative affect as a generalized impetus toward violence or crime (e.g., frustration aggression approaches).  相似文献   
188.
This study examined two theoretical models on the interaction between psychopathy, traumatic exposure, and lifetime posttraumatic stress in a sample of 81 male detainees. In Model 1, the interpersonal and affective features of psychopathy were assumed to protect against posttraumatic stress. In Model 2, the lifestyle and antisocial traits of psychopathy were assumed to lead to a lifestyle that increases the risk of traumatic exposure and subsequent posttraumatic stress. The authors found significant negative bivariate associations between Psychopathy Checklist-Revised (PCL-R) total, Interpersonal and Affective facet scores, and posttraumatic stress. Model 1 was confirmed, as they found the interaction between the Affective facet and traumatic exposure had a significant negative effect on posttraumatic stress. Model 2 was rejected. The authors' findings confirm that the interpersonal and affective features of psychopathy are associated with an emotional deficit and that the affective features of psychopathy are crucial for understanding the relationship between psychopathy and anxiety.  相似文献   
189.
The TCU Short Forms contain a revised and expanded set of assessments for planning and managing addiction treatment services. They are formatted as brief (1-page) forms to measure client needs and functioning, including drug use severity and history (TCUDS II), criminal thinking and cognitive orientation (CTSForm), motivation and readiness for treatment (MOTForm), psychological functioning (PSYForm), social relations and functioning (SOCForm), and therapeutic participation and engagement (ENGForm). These instruments facilitate optically-scanned data entry, computerized scoring, and rapid graphical feedback for clinical decisions. The present study (based on 5,022 inmates from eight residential prison treatment programs) examines evidence on scale reliabilities and measurement structures of these tools. Results confirmed their integrity and usefulness as indicators of individual and group-level therapeutic dynamics.  相似文献   
190.
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