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   311篇
  免费   6篇
各国政治   9篇
工人农民   16篇
世界政治   14篇
外交国际关系   19篇
法律   128篇
政治理论   130篇
综合类   1篇
  2021年   3篇
  2020年   6篇
  2019年   10篇
  2018年   8篇
  2017年   8篇
  2016年   4篇
  2015年   11篇
  2014年   8篇
  2013年   37篇
  2012年   8篇
  2011年   7篇
  2010年   8篇
  2009年   13篇
  2008年   11篇
  2007年   8篇
  2006年   3篇
  2005年   5篇
  2004年   8篇
  2003年   8篇
  2002年   4篇
  2001年   8篇
  2000年   13篇
  1999年   9篇
  1998年   5篇
  1996年   6篇
  1995年   6篇
  1994年   2篇
  1993年   8篇
  1992年   5篇
  1991年   10篇
  1990年   4篇
  1989年   13篇
  1988年   3篇
  1987年   8篇
  1986年   9篇
  1985年   5篇
  1984年   3篇
  1983年   4篇
  1982年   3篇
  1981年   5篇
  1980年   2篇
  1979年   3篇
  1978年   2篇
  1977年   1篇
  1976年   1篇
  1974年   1篇
排序方式: 共有317条查询结果,搜索用时 15 毫秒
51.
52.
53.
The random and indeterminate nature of the current unipolar world suggests a condition of increasing entropy. There are two reasons for this claim. First, relative capability advantages under unipolarity do not translate as easily as they once did into power and influence over others. Second, systemic constraint is a property that limits actors' freedom of action by imposing costs and benefits on certain kinds of actions. Unlike past multipolar and bipolar systems, the current unipolar system exerts only weak, if any, systemic constraints on the unipolar power and all other actors as well. Thus, polarity has become a largely meaningless concept. Today, system process rather than structure best explains international politics, and this process is one of entropy. Finally, I suggest two pathways from unipolarity to a more balanced system: one is fairly consistent with standard balance-of-power realism but adds an ideational component; the other restores equilibrium by means of entropy.  相似文献   
54.
This study seeks to provide a greater understanding of the factors that determine the perceived availability of alcohol and its role in predicting adolescents’ alcohol use. Participants were 151,703 7th–12th grade students (50% female) from a sample of 219 rural communities across the United States, with oversampling for predominantly Mexican-American and African-American communities. Multilevel analysis was used to estimate the perceived availability of alcohol as a function of physical and social availability measures and individual and community-level control variables. Physical availability was measured as the number of alcohol outlets in the community and whether beer and wine were sold in non-liquor stores. Social availability measured the availability of alcohol from social or family groups. Last month alcohol use was then estimated as a function of physical, social and perceived availabilities and control variables. Physical availability had little relationship to perceived availability or recent alcohol use while social availability was a strong predictor of both. Perceived availabilities at the individual and community levels were significant in predicting last month alcohol use. The findings suggest that altering both perceived and actual availability of alcohol can potentially have strong effects on the levels of adolescent alcohol use.  相似文献   
55.
Intergovernmental competition can enhance efficiency. Centralization of government expenditures inhibits intergovernmental competition because it makes governments more homogeneous, and so cartelizes local governments. Cartelization reduces Tiebout competition, and limits benchmark competition in which one government??s performance can be compared with neighboring governments. Measuring fiscal centralization as the ratio of local to state and local government expenditures within the state, the evidence shows that more fiscal decentralization is associated with higher levels of state per capita income. Cartelization of local governments negatively impacts income.  相似文献   
56.
The methoxy methyl phenylacetones share an isobaric relationship (equivalent mass but different elemental composition) to the controlled precursor substance 3,4-methylenedioxyphenylacetone (3,4-methylenedioxyphenyl-2-propanone; 3,4-MDP-2-P). The ten ring substituted methoxy methyl phenylacetones are resolved by capillary gas chromatography on a modified cyclodextrin stationary phase. All ten regioisomeric ketones eluted before the controlled precursor substance 3,4-methylenedioxyphenylacetone. The vapor phase infrared spectra generated from the capillary column effluent clearly differentiated 3,4-MDP-2-P from the various methoxy methyl phenylacetones. Additionally the methoxy methyl phenylacetones provide unique individual infrared spectra. Infrared absorption frequencies and patterns confirmed the relative position of the methoxy-group and the acetone side-chain for the regioisomeric ketones.  相似文献   
57.
It is widely accepted that the number of self‐represented litigants has skyrocketed nationwide, especially in family law cases. Although nationwide comprehensive data on the number of self‐represented litigants do not exist, anecdotal evidence supports the belief that self‐representation is increasing. The challenge for courts and the entire legal profession is how to respond. Most observers in Indiana would agree that the traditional model of family law litigation—both spouses represented by lawyers settling their disputes before a judge—is no longer the norm in family law cases. Judges face a dilemma: assisting a self‐represented litigant to level the playing field against a represented party is seen by many as violating impartiality, even if the assistance is rendered to create a just result. In an effort to address the situation, the Indiana Supreme Court created the Pro Se Advisory Committee in April 2001. This article explores the long‐range implications of the issue of self‐represented litigants on Indiana's court system in hope that it will provide some insight for other jurisdictions. The first part of the article addresses the numbers of self‐represented litigants by tracking growth or declines in self‐represented cases and assessing whether there are any pockets of self‐represented litigants geographically or in certain case types. The second part of the article puts Indiana into context with the rest of the nation and reviews national trends. The third section reviews Indiana's response to self‐represented litigants over the last decade. The fourth section reviews current and ongoing projects in Indiana. The article concludes that the issue of self‐represented litigants will not fade away and that the challenge that guides the legal profession is how we provide equal access to justice for all who enter our courthouses.  相似文献   
58.
From 1939 to 1968 Florida used a unique referendum system to set property tax rates for public school operating expenditures at the median millage rate selected by voters. These referendums revealed the entire distribution of voter preferences, which is not possible in the standard up or down referendum. We are the first to use the Florida referendum data. The form of the ballot played an important role in how people voted. Voting machine elections were much more likely than paper ballots to result in rejections of the recommendations of school boards, and produced much greater dispersion of expressed preferences.  相似文献   
59.

Cetaceans—small whales, dolphins and porpoises—have long been popular performers in oceanaria. Captive cetaceans have also been used for research and employed in military operations. In some jurisdictions cetacean display facilities have been phased out or prohibited, and in the US and Hong Kong a high proportion of the whales and dolphins now in captivity have been captive-bred. A large, growing and increasingly opportunistic trade in dolphins and small toothed whales nevertheless exists, its centres of supply having shifted away from North America, Japan, and Iceland to the Russian Federation and developing nations in Latin America, the Caribbean, West Africa, and Southeast Asia. Demand for live captures is being driven by: a new wave of traditional-type oceanaria and dolphin display facilities, as well as travelling shows, in the Middle East, Asia, Latin America, and the Caribbean; increasingly popular programs that offer physical contact with cetaceans, including the opportunity to feed, pet, and swim with them; and the proliferation of facilities that offer ‘dolphin assisted therapy’ to treat human illness or disability. Rigorous assessment of source populations is often lacking, and in some instances live capture is adding to the pressure on stocks already at risk from hunting, fishery bycatch, habitat degradation, and other factors. All too often, entrepreneurs appear to be taking advantage of lax (or non-existent) regulations in small island states or less developed or politically unstable countries to supply the growing global demand for dolphins and small whales. The regulation of trade in live cetaceans under CITES is fraught with problems, not least the poor quality of reporting and the lack of a rigorous mechanism for preparation, review, and evaluation of non-detriment findings.  相似文献   
60.
The new strategic partnership between the United States and India is creating opportunities for security cooperation. A key element in this partnership—U.S.-India space cooperation—will most likely become the defining relationship for international space cooperation around which other space-faring nations will posture. The Indian space program is rapidly developing world-class capabilities and presents itself as a worthy partner. The U.S. space program should be able to provide innovative ideas for fruitful collaboration. Despite these propitious circumstances, there are potential obstacles of cost, security, and risk. The biggest obstacle, however, might simply be bureaucratic intransigence and inertia. The opportunity is here, now, for the United States and India each to add an important new jewel to their crown of international space cooperation activities. Most importantly, this new space partnership should enhance the security and prosperity of the United States, India, and the world.  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