全文获取类型
收费全文 | 16111篇 |
免费 | 461篇 |
专业分类
财政金融 | 2791篇 |
工业经济 | 1075篇 |
计划管理 | 2779篇 |
经济学 | 3397篇 |
综合类 | 112篇 |
运输经济 | 85篇 |
旅游经济 | 233篇 |
贸易经济 | 3080篇 |
农业经济 | 640篇 |
经济概况 | 2132篇 |
邮电经济 | 248篇 |
出版年
2021年 | 133篇 |
2020年 | 189篇 |
2019年 | 262篇 |
2018年 | 422篇 |
2017年 | 439篇 |
2016年 | 445篇 |
2015年 | 299篇 |
2014年 | 438篇 |
2013年 | 1675篇 |
2012年 | 492篇 |
2011年 | 538篇 |
2010年 | 517篇 |
2009年 | 497篇 |
2008年 | 506篇 |
2007年 | 410篇 |
2006年 | 360篇 |
2005年 | 320篇 |
2004年 | 271篇 |
2003年 | 293篇 |
2002年 | 304篇 |
2001年 | 271篇 |
2000年 | 289篇 |
1999年 | 284篇 |
1998年 | 260篇 |
1997年 | 221篇 |
1996年 | 220篇 |
1995年 | 208篇 |
1994年 | 209篇 |
1993年 | 231篇 |
1992年 | 213篇 |
1991年 | 221篇 |
1990年 | 180篇 |
1989年 | 195篇 |
1988年 | 160篇 |
1987年 | 154篇 |
1986年 | 156篇 |
1985年 | 277篇 |
1984年 | 264篇 |
1983年 | 244篇 |
1982年 | 225篇 |
1981年 | 214篇 |
1980年 | 222篇 |
1979年 | 214篇 |
1978年 | 172篇 |
1977年 | 191篇 |
1976年 | 163篇 |
1975年 | 151篇 |
1974年 | 139篇 |
1973年 | 138篇 |
1971年 | 105篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
A metropolitan community was faced with the problem of locating areas of the community in terms of more or less need for leisure-time services. The authors developed a set of methods and techniques to solve this problem. It was noted that these methods differed in some ways from prior efforts of this sort. The advantages of the methods were that they could use readily available data, did not require the use of a computer, and presented a relative level of need that was more than a simple ranking of planning areas. Further, the methods could be used to locate any number of conditions in which one might be interested. In addition to spelling out the details of the original effort, an attempt is made to show how factor analysis could be used as an alternate approach to the first effort. The pros and cons of factor analysis as a substitute method are discussed. The major disadvantage would be if the particular community did not have a large computer available. This is outweighed by the higher levels of accuracy, predictability and comparability provided by factor analysis. 相似文献
992.
993.
994.
995.
996.
Gabe H. De Vries 《De Economist》1979,127(2):298-329
Summary This article focuses onthe influence of debt management on the term-structure of interest rates. Four theories are discussed
which try to explain the factors influencing the term-structure. It proved that the four theories could be distinguished according
to three aspects which have been investigated by means of analysis of variance and of the estiamtion of two reduced form equations
with Dutch data during the period 1950 through 1973. It could be concluded that the liquidity preference theory and to a smaller
extent the preferred habitat theory fitted the data relatively well. From this it followed that the influence of debt management
on the term-structure of interest rates is rather small.
This article is an elaboration of a paper written at the end of the author’s study at Groningen State University. He thanks
Dr. S. K. Kuipers, Mr. P. W. Otter and Mr. B. S. Wilpstra, all connected with the Groningen State University, for their advice
during the writing of the paper. He also thanks Mr. A. van der Veen, who took care of all the calculation which was necessary
for the elaboration. He further thanks Dr. M. M. G. Fase for the comments he made on a previous version of this article.
The author works at the Central Bureau of Statistics in The Hague. 相似文献
997.
998.
999.
1000.
The densities of volume, surface and of integral of mean curvature and theEulerian characteristic per unit volume of a class of very general special structures are related to quantities which can be measured in specimens obtained by transmission microscopy. A correction for the overlap (Holmes effect) is developped which applies to systems of convex bodies with limited density of volume and the particles of which are randomly distributed if the thin sections have a thickness that is large in comparison with the mean caliper diameter of the particles. 相似文献