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   5132篇
  免费   107篇
  国内免费   1篇
财政金融   863篇
工业经济   346篇
计划管理   810篇
经济学   1109篇
综合类   68篇
运输经济   28篇
旅游经济   63篇
贸易经济   773篇
农业经济   237篇
经济概况   940篇
邮电经济   3篇
  2020年   64篇
  2019年   105篇
  2018年   121篇
  2017年   130篇
  2016年   119篇
  2015年   65篇
  2014年   122篇
  2013年   484篇
  2012年   148篇
  2011年   191篇
  2010年   152篇
  2009年   143篇
  2008年   140篇
  2007年   135篇
  2006年   114篇
  2005年   89篇
  2004年   87篇
  2003年   90篇
  2002年   86篇
  2001年   117篇
  2000年   104篇
  1999年   83篇
  1998年   101篇
  1997年   73篇
  1996年   71篇
  1995年   87篇
  1994年   59篇
  1993年   85篇
  1992年   74篇
  1991年   80篇
  1990年   71篇
  1989年   78篇
  1988年   66篇
  1987年   71篇
  1986年   74篇
  1985年   81篇
  1984年   91篇
  1983年   64篇
  1982年   72篇
  1981年   68篇
  1980年   78篇
  1979年   65篇
  1978年   48篇
  1977年   53篇
  1976年   40篇
  1975年   49篇
  1974年   34篇
  1973年   40篇
  1972年   33篇
  1971年   30篇
排序方式: 共有5240条查询结果,搜索用时 15 毫秒
31.
32.
33.
This paper discusses the issues of developing a consistent system of forecast computations providing a long-term outlook for the Russian economy in both sectoral and regional contexts. Under special focus is the formation of regional development scenarios. Such scenarios are suggested to be based on the territorial pattern of investments into the national economy. Results of computations are presented for the period up to 2030 for two scenarios.  相似文献   
34.
家乐福集团在中国开设的大型超市就像零售业中的一个"海峡"--从东方和从西方卷来的大浪交织在一起:东方--在超市一边的货架上,可以看到大量鲜活的鱼、虾、牛蛙甚至甲鱼;西方--在另一边不远的冷藏柜里,又能看到真空包装的烟熏咸肉和意大利腊肠.这个来自法国的超级零售商运用现代的模式,结合当地人的口味,在中国经营着他们的零售帝国.  相似文献   
35.
The feasibility of the railroad sector reaching its long-term development goals and developmental factors and limitations are analyzed against the background of structural changes in the sector. Investment policy, investment attraction mechanisms under limited financial resources, the principles of development of regional investment policies, and regional investment programs and projects are discussed. The sector’s internal development reserves during its investment policy are analyzed.  相似文献   
36.
37.
This article presents a medium-term forecast of the development of the Russian nanoindustry, taking into account the assumed transition of the industry from the formation stage to the investment growth stage. Problems associated with the estimated output volumes of products in the Russian nanoindustry are considered, since the trends recorded in the primary statistical data are very far from reflecting the real situation due to the imperfection of the system of statistics of nano-containing products, as well as a reduction of state funding and a decline in the intensity of research in the industry. It is concluded that a full-fledged industry has not been yet completely formed in Russia and it actually exists only as a statistical phenomenon; in addition, the project really set different objectives from the declared creation of a breakthrough high-technology branch.  相似文献   
38.
This paper presents an approach to assessing the efficacy of public spending on research and development in state programs. At present, there is a need to develop a unified approach to the analysis and evaluation of the efficacy of such spending from the perspective of participants in state programs (federal executive bodies). The proposed approach does not allow evaluating the efficacy of public spending on the development of research areas assigned to the authors.  相似文献   
39.
40.
This paper presents a modeling methodology capable of accounting for spatial correlation across choice alternatives in discrete choice modeling applications. Many location choice (e.g., residential location, workplace location, destination location) modeling contexts involve choice sets where alternatives are spatially correlated with one another due to unobserved factors. In the presence of such spatial correlation, traditional discrete choice modeling methods that are often based on the assumption of independence among choice alternatives are not appropriate. In this paper, a Generalized Spatially Correlated Logit (GSCL) model that allows one to represent the degree of spatial correlation as a function of a multi-dimensional vector of attributes characterizing each pair of location choice alternatives is formulated and presented. The formulation of the GSCL model allows one to accommodate alternative correlation mechanisms rather than pre-imposing restrictive correlation assumptions on the location choice alternatives. The model is applied to the analysis of residential location choice behavior using a sample of households drawn from the 2000 San Francisco Bay Area Travel Survey (BATS) data set. Model estimation results obtained from the GSCL are compared against those obtained using the standard multinomial logit (MNL) model and the spatially correlated logit (SCL) model where only correlations across neighboring (or adjacent) alternatives are accommodated. Model findings suggest that there is significant spatial correlation across alternatives that do not share a common boundary, and that the GSCL offers the ability to more accurately capture spatial location choice behavior.  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