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   510篇
  免费   15篇
各国政治   11篇
工人农民   40篇
世界政治   37篇
外交国际关系   21篇
法律   233篇
中国政治   12篇
政治理论   163篇
综合类   8篇
  2022年   3篇
  2021年   4篇
  2020年   9篇
  2019年   11篇
  2018年   15篇
  2017年   16篇
  2016年   27篇
  2015年   18篇
  2014年   10篇
  2013年   59篇
  2012年   15篇
  2011年   21篇
  2010年   22篇
  2009年   17篇
  2008年   28篇
  2007年   23篇
  2006年   22篇
  2005年   9篇
  2004年   5篇
  2003年   11篇
  2002年   9篇
  2001年   16篇
  2000年   15篇
  1999年   9篇
  1998年   6篇
  1997年   11篇
  1996年   4篇
  1995年   6篇
  1994年   6篇
  1993年   7篇
  1992年   5篇
  1991年   9篇
  1990年   2篇
  1988年   5篇
  1987年   7篇
  1986年   3篇
  1985年   3篇
  1984年   6篇
  1983年   2篇
  1982年   2篇
  1981年   14篇
  1980年   11篇
  1979年   2篇
  1977年   2篇
  1975年   3篇
  1973年   2篇
  1970年   2篇
  1969年   2篇
  1968年   2篇
  1966年   2篇
排序方式: 共有525条查询结果,搜索用时 15 毫秒
71.
Housing choice vouchers provide low‐income households with additional income to spend on rental housing in the private market. The assistance vouchers provide is substantial, offering the potential to dramatically expand the neighborhoods—and associated public schools—that low‐income households can reach. However, existing research on the program suggests that housing choice voucher holders live in neighborhoods with schools that are no better than those accessible to other households with similar incomes. Households, in other words, do not seem to spend the additional income provided by the voucher to access better schools. In this analysis we rely on a large‐scale administrative data set to explore why voucher households typically do not live near to better schools, as measured by school‐level proficiency rates. We combine confidential administrative data from the Department of Housing and Urban Development on 1.4 million housing choice voucher holders in 15 states, with school‐level data from 5,841 different school districts, to examine why the average housing voucher holder does not live near to higher‐performing schools than otherwise similar households without vouchers. Specifically, we use the large‐scale administrative data set to test whether voucher holders living in areas with good schools nearby and slack housing markets move toward better schools when schools become salient for them—that is, when their oldest child becomes school eligible. We take advantage of the thick sample of households with young children provided through our administrative data to implement both a household fixed effects and a regression discontinuity design. Together these analyses shed light on whether voucher households are more likely to move toward better schools when schools are most relevant, and how market conditions shape that response. We find that families with vouchers are more likely to move toward a better school in the year before their oldest child meets the eligibility cutoff for kindergarten, suggesting salience matters. Further, the magnitude of the effect is larger in metropolitan areas with a relatively high share of affordable rental units located near high‐performing schools and in neighborhoods in close proximity to higher‐performing schools. Results suggest that, if given the appropriate information and opportunities, more voucher families would move to better schools when their children reach school age.  相似文献   
72.
Research suggests that social support and mental toughness (i.e., the ability to effectively cope with stress despite adversity and/or failure) may be associated with decreased suicide risk, although methods for measuring mental toughness remain largely undeveloped. The relationship remains largely unknown. In response to this research gap, the psychometric properties of the Mental Toughness Psychological Skills Profile (MTPSP; Asken 2005), and its association with suicide ideation, were evaluated in a sample of active duty U.S. Air Force Security Forces personnel, a subpopulation especially vulnerable to suicide risk. 273 participants from two Air Force bases completed self-report scales including the MTPSP. Results indicated that the MTPSP is comprised of five subscales: Negative Mindset, Positive Mindset, Confidence, Achievement, and Health Behaviors. All five MTPSP factors were independently correlated with general distress, somatic anxiety, positive affect, presence of meaning in life, search for meaning in life, positive self-bias, social support sources, and suicide ideation. The Confidence factor was the only factor that had a significant association with suicide ideation when all five factors were considered simultaneously (β?=??0.18, p?=?.016), but was fully mediated by social support (β?=??0.17, p?=?.033). Self-confidence may be associated with reduced suicide risk because those individuals tend to report higher social support.  相似文献   
73.
This paper provides new insights on the study of crime modeling through the development of a hybrid cellular automaton (CA) and Multi-agent System (MAS) simulation model that is able to combine components of multiple criminological theories to forecast the locations of residential burglary targets: journey to crime (JTC), social disorganization (SD) theory, and routine activity (RA) theory. In order to combine individual factors from each theory into a unified model, Analytic Hierarchy Process (AHP) was employed for hierarchical parameter selection. The model is then evaluated using data on offenders obtained from the Dallas Police Department to examine how different crime theories perform in the prediction of residential burglary. Compared to the SD- and RA-weighted models, the JTC-weighted model performed the best when comparisons were made to actual burglary locations. The findings demonstrate that the simulation models of crime provide test beds for research into the explanatory power of various crime theories.  相似文献   
74.
75.
Hoa  Nguyen Kim  Turner  Bryan S. 《Society》2010,47(3):246-253
Against the background of twentieth-century military conflict in Asia, the article concentrates on China’s contemporary relationships with outlying states, regions and provinces. Employing a version of Thomas Malthus’s political economy, we argue that population wars are an important, if often disguised, future of modern foreign relations. Through an examination of a various examples but specifically Tibet, Vietnam and Uyghurs in Xinjiang province, the article considers the current prospects of sinicization by demographic means. We conclude by describing ‘red capitalism’ in Asia as a combination of authoritarian states plus economicv success within the framework of a tributary Han civilization.  相似文献   
76.
The global financial – and now economic – crisis has demonstrated that markets, and particularly financial markets, are not self-correcting and that, if left unregulated, they will inevitably overreach themselves and lead to excess. Governments have a duty to regulate markets in the public interest but where (as in the case of recession) markets produce adverse outcomes, governments also have a duty to lean against market logic in order to minimise those outcomes. These lessons extend well beyond purely economic matters. Unregulated markets will inevitably produce social and environmental outcomes that reflect narrow and short-term individual and sectoral interests rather than those of society as a whole. The whole point of democracy is that it allows the less powerful majority to use the power and legitimacy of government to offset and counteract the economic power of a minority. If the market cannot be or is not challenged, democracy itself is weakened, loses its point and forfeits the confidence of the people it is meant to serve.  相似文献   
77.
Is New Zealand a model for “reinventing” government and cutting spending? The government of Alberta, Canada, consciously replicated significant elements of the New Zealand model to attain fiscal balance and public sector reorganization, including the core element of restructuring institutions to change individual behavior. Despite broad similarities in policy content and outcome, differences in the specific content of policy and the politics of policy implementation led to differences in the sustainability of reform and the location of budget cuts. Alberta's Progressive Conservative party emphasized expenditure cuts where both the New Zealand Labour and National parties emphasized government reorganization and the introduction of market mechanisms. Contrasting these efforts to balance budgets and reinvent government suggests that there is considerable variation in the “model,” and that left governments in general are probably more likely to pursue and succeed at the reinvention of government, while stinting fiscal balance. Right governments, on the other hand, are more likely to achieve short-run fiscal balance at the expense of successful reinvention. In turn this suggests that while the partisan orientation of the reforming party matters, neither has an ideal policy mix for long-term fiscal stability. Alternation of governments may provide the best policy mix.  相似文献   
78.
This article is based on select results taken from a survey of NGO and provincial government policy workers. The purpose is to provide an empirically based assessment of how government and non‐government policy workers engage with one another in the policy process. The data suggest that policy co‐construction and co‐production are a significant feature of the process but there is some need for nuance. The data presented here indicate that the extent of policy engagement may not be as broadly inclusive as the proponents of New Governance suggest.  相似文献   
79.
In forensic intelligence-gathering it would be useful to be able to estimate the size of a perpetrator's foot from a standing bare footprint found at the scene of crime. Currently, the advice is to add a fixed amount to the length of the footprint (typically 1.5 or 2.0 cm), but there is little evidence for this approach. This study used measured footprint and actual foot lengths from 146 participants from the white British student population of a University in the UK. Data were analysed using multiple regression with foot length as the dependent (outcome) variable and footprint length and sex as the independent variable/factor respectively. Sex was not a significant predictor. The regression equation for the best estimate of the foot length is 19.89 + 0.95 × print length ± 8 mm.  相似文献   
80.
The aims of this study were to determine if dynamic parameters (duration, size, velocity, jerk, and pen pressure) differed for signing style (text-based, stylized, and mixed) and if signing style influences handwriting dynamics equally across three signature conditions (genuine, disguised, and auto-simulation). Ninety writers provided 10 genuine signatures, five disguised signatures, and five auto-simulated signatures. All 1800 signatures were collected using a digitizing tablet resulting in a database of each signature's dynamic characteristics. With genuine signatures, there were significant differences between styles for size, velocity, and pen pressure, and there were significant differences between genuine signatures and at least one of the un-natural signature conditions for all parameters. For velocity and size, these changes with condition were dependent on style. Changes with condition for the other parameters were similar for the three styles. This study shows that there are differences among natural signature styles and disguise behaviors that may be relevant in forensic signature examinations.  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