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   19529篇
  免费   610篇
各国政治   773篇
工人农民   1410篇
世界政治   980篇
外交国际关系   644篇
法律   12160篇
中国共产党   1篇
中国政治   61篇
政治理论   4042篇
综合类   68篇
  2020年   204篇
  2019年   224篇
  2018年   1491篇
  2017年   1470篇
  2016年   1302篇
  2015年   338篇
  2014年   277篇
  2013年   1242篇
  2012年   450篇
  2011年   1162篇
  2010年   1271篇
  2009年   867篇
  2008年   996篇
  2007年   946篇
  2006年   289篇
  2005年   339篇
  2004年   458篇
  2003年   402篇
  2002年   271篇
  2001年   459篇
  2000年   401篇
  1999年   341篇
  1998年   172篇
  1997年   127篇
  1996年   128篇
  1995年   162篇
  1994年   157篇
  1993年   135篇
  1992年   235篇
  1991年   233篇
  1990年   237篇
  1989年   233篇
  1988年   200篇
  1987年   214篇
  1986年   223篇
  1985年   235篇
  1984年   187篇
  1983年   209篇
  1982年   137篇
  1981年   124篇
  1980年   98篇
  1979年   157篇
  1978年   128篇
  1977年   98篇
  1976年   85篇
  1975年   92篇
  1974年   113篇
  1973年   108篇
  1972年   85篇
  1969年   73篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
21.
The DNA commission of the International Society of Forensic Genetics (ISFG) was convened at the 21st congress of the International Society for Forensic Genetics held between 13 and 17 September in the Azores, Portugal. The purpose of the group was to agree on guidelines to encourage best practice that can be universally applied to assist with mixture interpretation. In addition the commission was tasked to provide guidance on low copy number (LCN) reporting. Our discussions have highlighted a significant need for continuing education and research into this area. We have attempted to present a consensus from experts but to be practical we do not claim to have conveyed a clear vision in every respect in this difficult subject. For this reason, we propose to allow a period of time for feedback and reflection by the scientific community. Then the DNA commission will meet again to consider further recommendations.  相似文献   
22.
23.
24.
This article examines constraints in development bureaucracies in intensifying the use of microcomputers as they move beyond processing applications to analysing applications. The work is based on the experience of several ministries of the Government of Kenya. Processing applications involve throughput of data and are relatively simple. Analysing applications, in contrast, are more complex and include data assembly, sensitivity analysis, and modelling. The article argues that processing applications are more compatible with the administrative cultures, bureaucratic functions, personnel skill levels and organizational structures of development bureaucracies. Analysing applications are less compatible because they require a level of training and motivation uncommon in development bureaucracies. Analysing applications are further thwarted by constraints in the supply of relevant information and the lack of demand for analysis by decision-makers. A four-cell matrix is developed which explains these constraints. The article concludes with several recommendations for encouraging microcomputer-based analysis, but cautions that processing applications will continue to dominate for the foreseeable future.  相似文献   
25.
26.
  East Asia, including Northeast Asia and Southeast Asia, has developed tightly-linked production/distribution networks through globalizing corporate activities. The vertical chain of production in East Asia has been even more sophisticated than economic integration in East Europe or Latin America. However, the political environment of East Asia for trade and investment has been far from borderless. The integration effort at the policy level has been very much limited so far, due to the historical background as well as geopolitics surrounding East Asia. The Asian currency/financial crisis provided these countries a historical turning point. After the burst of the crisis, East Asians realized that they have to take care of themselves in their difficulties, not depending on outside forces. A natural choice for them was to step into the realm of regionalism. In 1998, Japan and Korea officially announced that they would discard the long-lasting GATT/WTO-only approach and adapt the multi-layered approach, including both regionalism and multilateralism. The ultimate goal of regionalism would be a region-wide integration including ASEAN+3. As a steppingstone, Japan signed the Japan-Singapore Economic Partnership Agreement (JSEPA) in January 2002. In a parallel move, the ASEAN and China Leaders announced in November 2001 the establishment of an ASEAN-China Free Trade Area (ACFTA) within 10 years. This article will follow up the most recent advancement of regional institutional building in East Asia with the emphasis on peculiar characteristics of economic integration in the region and discuss its implications for Asia-Europe relations. This paper is heavily drawn from Kimura (2002, 2003).  相似文献   
27.
This paper links the policy context regarding S&T parks to the objectives and characteristics of the established parks and incubators in a relatively small, converging European country. S&T parks and incubators in Greece during the past decade and a half have gradually shifted in terms of ownership and management from university/research institute to the private sector and in terms of financing from public to private funds, also involving the provision of seed capital and access to venture capital. This gradual shift toward more private engagement has created a variety of models out of which, it is hoped, successful innovative companies will emerge in larger numbers than in the past.
  相似文献   
28.
29.
This paper reviews the existing literature on consumer credit reporting, the most extensively used instrument to overcome information asymmetry and adverse selection problems in credit markets. Despite the copious literature in economics and some research in regulatory policy, the legal community has paid almost no attention to the legal framework of consumer credit information systems, specially within the context of the European Union. Studies on the topic, however, seem particularly relevant in view of the establishment of a single market for consumer credit. This article ultimately calls for further legal research to address consumer protection concerns and inform future legislation.   相似文献   
30.
This article offers an analysis of the European airline industry in order to understand the new dynamics of the competitive field. The liberalization process did not lead the entrance of competitors similar to incumbents, but a new organizational model has been developed, the one of low cost carriers. The incumbents’ reaction to the liberalization process coupled with the entrance of low cost companies into the sector are hence considered. Two theories are analysed: the contestable markets theory, to understand the theoretical vision that has influenced the liberalization process, and the core theory, a modern approach to the concept of destructive competition that, according to some authors, is a recurring problem in the sector. While numerous barriers to entry still exist, the paper examines how the organizational model of low cost companies has helped new entrants to overtake these obstacles. By the same token, the application of the core theory does not seem to justify strategic alliances taking place in these years. The competitive framework is definitely clearer if we analyse sector changes in a different way, from the point of view of low cost companies considered as new market actors.  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