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   66849篇
  免费   3301篇
各国政治   4524篇
工人农民   2804篇
世界政治   5965篇
外交国际关系   3838篇
法律   30622篇
中国共产党   9篇
中国政治   756篇
政治理论   20682篇
综合类   950篇
  2021年   399篇
  2020年   1166篇
  2019年   1522篇
  2018年   1638篇
  2017年   1945篇
  2016年   2171篇
  2015年   1834篇
  2014年   2106篇
  2013年   10622篇
  2012年   1546篇
  2011年   1653篇
  2010年   1801篇
  2009年   2036篇
  2008年   1693篇
  2007年   1662篇
  2006年   1853篇
  2005年   1746篇
  2004年   1652篇
  2003年   1441篇
  2002年   1500篇
  2001年   1442篇
  2000年   1224篇
  1999年   1109篇
  1998年   1082篇
  1997年   958篇
  1996年   935篇
  1995年   906篇
  1994年   906篇
  1993年   920篇
  1992年   907篇
  1991年   931篇
  1990年   879篇
  1989年   954篇
  1988年   940篇
  1987年   949篇
  1986年   924篇
  1985年   998篇
  1984年   885篇
  1983年   932篇
  1982年   874篇
  1981年   826篇
  1980年   639篇
  1979年   656篇
  1978年   580篇
  1977年   521篇
  1976年   483篇
  1975年   409篇
  1974年   412篇
  1973年   426篇
  1972年   367篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
In 1989, after almost two decades of substance-by-substance standard setting, the Occupational Safety and Health Administration (OSHA) promulgated its Air Contaminants Standard, imposing new exposure limits for 376 toxic substances encountered in U.S. industry. In marked contrast to earlier regulations, the Air Contaminants Standard has generated relatively little industry opposition. This paper analyzes the standard in the context of the twenty-year debate over the appropriate role for technological feasibility and economic compliance costs in occupational health policy. The political feasibility of the new standard is traced to OSHA's abandonment of "technology forcing" in favor of reliance on "off-the-shelf" technologies already in use in major firms. While important as an embodiment of OSHA's new "generic" approach to regulation, the Air Contaminants Standard cannot serve as a model for future occupational health policy, due to its reliance on informal, closed-door mechanisms for establishing regulatory priorities and permissible exposure limits.  相似文献   
992.
InMaryland v. Craig, the United States Supreme Court relied heavily on a brief prepared by a committee of the American Psychology-Law Society on behalf of the American Psychological Association (APA). The APA brief concluded that sexually abused children may be particularly vulnerable to distress in the legal process, especially when forced to confront the defendant face to face, and that such acute distress may be inconsistent with the state's interests in promotion of reliable testimony and child welfare. APA also argued that psychological theory and research provide foundations for individualized determination of the need for measures to protect children from face-to-face confrontation. *** DIRECT SUPPORT *** AFE06051 00002  相似文献   
993.
994.
A number of social and psychological factors present in most adolescent parents place them at high risk for abusive behavior toward their children. However, current child abuse potential measures do not include adolescent samples as part of the psychometric data base. Consequently, the purpose of this study was twofold: (1) to investigate whether a Black adolescent sample would perform differently than an adult nonabusing sample on the Child Abuse Potential Inventory (CAP), and (2) to examine the relationship between history of abuse or witnessing violence to scores on the CAP. Results revealed that Black adolescents scored significantly higher than the adult normative sample on the CAP; consequently, cutoff scores need to be empirically established for adolescents. Additional analyses indicated that a history of abuse, as well as a history of witnessing violence, are associated with a high potential for abuse.  相似文献   
995.
Although the formal institutional structure that defines the temporal order of play in a policy game between the Congress and President ought to provide Congress with agenda power, the President is traditionally treated as the dominant player in this relationship. We show that if the President can make clear-cut commitments, presidential commitment can counter the dominance hierarchy and the complexion of equilibrium outcomes. Thus, the details of political interactions (in particular, the possibilities for commitment) may be as important as the formal specification of institutional structure.We thank Peter Aranson, David Austen-Smith, Ed Campos, Gerry Faulhaber, Art Frank, Ken Koford, William Riker, Janet Pack, the anonymous referees, and seminar participants at the University of Delaware, the University of Pennsylvania, and the University of Rochester for helpful comments, subject to the usual caveat. We also thank Joel Friedlander and Harold Dichter for research assistance.  相似文献   
996.
Prepared as a response to Frey and Eichenberger's Anomalies in Political Economy. We thank Gordon Tullock for helpful discussions. This work was partially supported by the Taylor Experimental Laboratory at Washington University.  相似文献   
997.
It is widely believed that electoral pressures cause legislators to favor government spending programs. This electoral theory of spending is shown to encompass two core hypotheses: (1) the electoral consequences hypothesis, which states that support for spending programs improves the representative's electoral showing; and (2) the legislator insecurity hypothesis, which states that greater electoral insecurity leads representatives to be more in favor of spending programs. A test of these ideas using spending scores for U.S. representatives in 1986 finds that neither hypothesis is supported by the data.  相似文献   
998.
Set against a backdrop of current public policy and case law, this study investigates Canadian attitudes toward affirmative action among both citizens and decision makers. We find low levels of support for such programs across a variety of contexts and intended beneficiaries, but we also discover that opinion on both sides of the issue is rather soft, for large portions of those taking positions on the matter are willing to reconsider their views when prompted. We interpret this finding as an indication of what Philip Converse has called nonattitudes. Thus, a substantial portion of Canadians appear to hold no genuine attitudes on the question of affirmative action and are relatively open to persuasion. In contrast, the preferences of those with stable attitudes are rooted in the tradeoff between values of equality and merit. Implications for policy activists in this issue area are discussed.The research reported here is part of a large project supported by the Social Sciences and Humanities Research Council (Grant No. 411-85-001). The Centre of Criminology at the University of Toronto has provided a home, and indispensable support, for the Charter Project. This research was also facilitated by a contribution from the Solicitor General of Canada to the Centre of Criminology, University of Toronto. Our thanks also go to Robert Vipond for his help in clarifying our concepts.  相似文献   
999.
This report reviews technology transfer in light of the Stevenson-Wydler Technology Innovation Act of 1980. Following a brief introduction, a section on “Definitions” explains the several meanings that the phrase “technology transfer” now carries in policy discussions. The next section, on “Passive Technology Transfer”, reviews traditional Department of Defense scientific and technical information programs that relate to technology transfer. A section on “Military Industrial Transfer” examines technology transfer from the Defense Department to private industry, expecially to defense contractors. A section on “The Stevenson-Wydler Act and Active Technology Transfer” describes the principal provisions of the new act and why Congress passed it. The next two sections, on “NASA’s Technology Transfer Program” and “The Federal Laboratory Consortium” outline the two existing Government programs Congress relied upon in developing ideas for the new law. A section on “Implementation of the Stevenson-Wydler Act”, discusses several important issues that must be considered by Navy laboratory management as the new law is put into effect in the Navy. Finally, a brief conclusion emphasizes the major point of the report: That Congress, in passing the Stevenson-Wydler Act, did not fully consider what relationship the new technology transfer programs it was requiring in the Executive Branch should bear to existing programs with similar purposes. If the public interest is to be served, the report argues, the Navy must consciously and carefully determine the proper nature of this relationship.  相似文献   
1000.
Technology transfer is the process by which technology originating at one institutional setting is adapted for use in another. A major impediment to the implementation of new technologies to assist with mangerial decision-making problems is a lack of communication between the technology and management communities. Development of a tool designed to bridge the technology transfer gap was the goal of this research. The result is a prototype software package which may be used on an interactive computer terminal by a manager for assistance in designing a decision support system (DSS). The four primary research tasks were:
  1. Develop a conceptual model of the DSS design process.
  2. Select and adapt, or create, appropriate software to mechanize the model.
  3. Develop a knowledge base to describe the interactiveness of various organization variables and managerial decision-making needs.
  4. Collect and analyze interview data and implement resultant production rules on the model.
Tasks 1 and 2 were accomplished first to establish the feasibility of this effort. An interview instrument was developed for Task 3. And, corporate managers from several firms were interviewed to accomplish Task 4. Using this data, a prototype production rule model (called DECAIDS for DECISION AIDS) was constructed which supports managerial decision-making from the EMYCIN production rule system used at Stanford University. The purpose of this article is to introduce the need for a Decision Support System Model. A complete copy of this research can be obtained through University Microfilms International, 300 N. Zeeb Road, Ann Arbor, Michigan 48106, from the Naval Postgraduate School, Monterey, California 93940, or the Defense Technical Information Center, Cameron Station, Alexandria, Virginia 22314. The title is “An Interactive Decision Support System for Technology Transfer Pertaining to Organization and Management”, 1980.  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