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   30176篇
  免费   755篇
  国内免费   21篇
财政金融   4347篇
工业经济   1627篇
计划管理   3640篇
经济学   5112篇
综合类   486篇
运输经济   125篇
旅游经济   278篇
贸易经济   4172篇
农业经济   818篇
经济概况   3238篇
水利工程   7067篇
信息产业经济   4篇
邮电经济   38篇
  2021年   204篇
  2020年   311篇
  2019年   414篇
  2018年   1366篇
  2017年   1316篇
  2016年   1009篇
  2015年   380篇
  2014年   600篇
  2013年   2284篇
  2012年   979篇
  2011年   1569篇
  2010年   1238篇
  2009年   1140篇
  2008年   1226篇
  2007年   1445篇
  2006年   786篇
  2005年   794篇
  2004年   828篇
  2003年   601篇
  2002年   494篇
  2001年   484篇
  2000年   461篇
  1999年   448篇
  1998年   461篇
  1997年   401篇
  1996年   358篇
  1995年   378篇
  1994年   341篇
  1993年   376篇
  1992年   418篇
  1991年   391篇
  1990年   337篇
  1989年   340篇
  1988年   305篇
  1987年   309篇
  1986年   289篇
  1985年   367篇
  1984年   395篇
  1983年   369篇
  1982年   335篇
  1981年   327篇
  1980年   325篇
  1979年   306篇
  1978年   293篇
  1977年   249篇
  1976年   252篇
  1975年   256篇
  1974年   195篇
  1973年   220篇
  1972年   184篇
排序方式: 共有10000条查询结果,搜索用时 500 毫秒
21.
Several studies have shown a relationship between the stocks of migrants and country-level investment in the home country; however the mechanism through which this relationship operates is still unexplored. We use a field experiment in which participants who are recent immigrants send information about risky decisions to others in their social network in their home country. The results demonstrate how this information influences decisions in the home country. We find that the advice given by family members and decisions made by friends significantly affects an individual’s risky decision-making.  相似文献   
22.
Water Resources Management - Public awareness of water quality concerns has increased since the Flint, MI crisis, but knowledge about water resources management remains low. Consequently,...  相似文献   
23.

A compelling body of research has found that investments in knowledge from other firms and universities spill over to enhance the performance of entrepreneurial firms. This literature has shown that firm performance is positively related to investments in new knowledge by other firms and research universities. This paper addresses a gap in the literature by positing that public sector knowledge is also conducive to enhancing performance by knowledge intensive entrepreneurial (KIE) firms. Our findings suggest that the public sector provides a fertile source of knowledge for enhancing KIE firm performance.

  相似文献   
24.
Institutions and the European Investment Bank are at the forefront of EU investment policy. Their role is expanding and it is now a widely-held position that an improvement in the economy will not eliminate the need for their intervention. The proposals for the 2021–2027 MFF launch more financial instruments and present ‘InvestEU’ as a larger more powerful version of the European Fund for Strategic Investments (EFSI). However, promotional banking is often misunderstood and so is the actual size of promotional banking in Europe in which InvestEU will operate.  相似文献   
25.
26.
27.
Various aspects of sustainable development and quality of life are considered, including the impact of standardization. Particular attention is paid to the study of the role played by standardization in improving environmental protection. In this connection the significance of standardization is shown as a factor of improving the technological potential of an enterprise and the quality of life. Various approaches to methods for assessing the effective impact of standardization on the quality of life are analyzed.  相似文献   
28.
29.
30.
Equipment of the Krasnoyarsk HPP is considered as an example to analyze the dependence of crack formation in runner blades on the operating conditions of t  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