全文获取类型
收费全文 | 23623篇 |
免费 | 562篇 |
国内免费 | 5篇 |
专业分类
财政金融 | 4436篇 |
工业经济 | 1556篇 |
计划管理 | 3510篇 |
经济学 | 4678篇 |
综合类 | 267篇 |
运输经济 | 106篇 |
旅游经济 | 334篇 |
贸易经济 | 3256篇 |
农业经济 | 1043篇 |
经济概况 | 2177篇 |
水利工程 | 2749篇 |
邮电经济 | 78篇 |
出版年
2021年 | 167篇 |
2020年 | 273篇 |
2019年 | 376篇 |
2018年 | 452篇 |
2017年 | 496篇 |
2016年 | 476篇 |
2015年 | 327篇 |
2014年 | 493篇 |
2013年 | 2208篇 |
2012年 | 692篇 |
2011年 | 765篇 |
2010年 | 565篇 |
2009年 | 669篇 |
2008年 | 645篇 |
2007年 | 714篇 |
2006年 | 624篇 |
2005年 | 612篇 |
2004年 | 583篇 |
2003年 | 501篇 |
2002年 | 468篇 |
2001年 | 439篇 |
2000年 | 492篇 |
1999年 | 434篇 |
1998年 | 467篇 |
1997年 | 461篇 |
1996年 | 399篇 |
1995年 | 423篇 |
1994年 | 421篇 |
1993年 | 410篇 |
1992年 | 435篇 |
1991年 | 429篇 |
1990年 | 346篇 |
1989年 | 288篇 |
1988年 | 310篇 |
1987年 | 281篇 |
1986年 | 310篇 |
1985年 | 443篇 |
1984年 | 437篇 |
1983年 | 385篇 |
1982年 | 392篇 |
1981年 | 412篇 |
1980年 | 360篇 |
1979年 | 357篇 |
1978年 | 334篇 |
1977年 | 255篇 |
1976年 | 274篇 |
1975年 | 261篇 |
1974年 | 203篇 |
1973年 | 208篇 |
1972年 | 139篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
202.
Entropy concepts have developed in four general contexts—thermodynamics, communication theory, statistical information theory and social and life sciences. These concepts have five distinct mathematical forms. Ambiguity and complexity in utilization of the concept has been heightened by this multi-faceted heritage. Effective utilization may be strengthened by a sharper articulation of entropy through combinations of literal, mathematical and graphical modes of expression. Geography and planning as user disciplines have important responsibilities in enhancing cross-disciplinary communication of this important adisciplinary concept. Implications of these arguments for the social sciences include the need for caution in drawing social analogies from the ambiguous entropy concepts of statistical mechanics; and an indication of the potential benefits of social science models based on the unambiguous entropic constructs of statistical information theory. 相似文献
203.
Ellen R. Auster 《Employee Responsibilities and Rights Journal》1988,1(2):129-144
U.S. companies have made important strides in combating sex discrimination in the workplace over the last two decades, but more subtle forms of sex bias still exist, often in decisions and behaviors that occur behind closed doors. This paper focuses on sex bias at professional and managerial levels. It explores sources of sex bias in the informal culture, selection and recruitment, task assignment, performance appraisal, promotion, and salary allocation, and then suggests action steps to help reduce sex bias in each of these areas. 相似文献
204.
205.
206.
207.
Di Santo R 《Fund raising management》1981,12(2):24-28
The case statement is the primary document upon which an organization bases its appeal for financial and philosophical support. This author points out how a well-constructed case statement can impact on fund raising success. 相似文献
208.
209.
John R. McNamara 《Managerial and Decision Economics》1992,13(4):287-293
Decision making in a modern manufacturing firm producing a variety of products while meeting order deadlines appears at first to have little basis in the economic Theory of the Firm. It is shown that optimal budget allocations, the fractions of revenue expended on inputs, are likely to remain constant for a succession of orders for each of a family of products, thus simplifying the decision process. Well-known heuristic decision rules may not only have a sound basis in economic theory but are evidently the best way to incorporate economic logic into a stream of fast-moving decisions. The discussion is extended to an explanation of the economic value of decision making to the firm, and why this value is usually assumed to be zero in theory. 相似文献
210.
Cassidy R 《Medical economics》1982,59(12):254-262