全文获取类型
收费全文 | 8026篇 |
免费 | 168篇 |
专业分类
财政金融 | 688篇 |
工业经济 | 225篇 |
计划管理 | 643篇 |
经济学 | 855篇 |
综合类 | 47篇 |
运输经济 | 21篇 |
旅游经济 | 34篇 |
贸易经济 | 659篇 |
农业经济 | 182篇 |
经济概况 | 743篇 |
水利工程 | 4092篇 |
邮电经济 | 5篇 |
出版年
2020年 | 93篇 |
2018年 | 234篇 |
2017年 | 249篇 |
2016年 | 214篇 |
2015年 | 125篇 |
2014年 | 196篇 |
2013年 | 538篇 |
2012年 | 251篇 |
2011年 | 244篇 |
2010年 | 194篇 |
2009年 | 225篇 |
2008年 | 217篇 |
2007年 | 256篇 |
2006年 | 203篇 |
2005年 | 159篇 |
2004年 | 185篇 |
2003年 | 146篇 |
2002年 | 140篇 |
2001年 | 109篇 |
2000年 | 131篇 |
1999年 | 119篇 |
1998年 | 139篇 |
1997年 | 110篇 |
1996年 | 124篇 |
1995年 | 117篇 |
1994年 | 120篇 |
1993年 | 114篇 |
1992年 | 131篇 |
1991年 | 129篇 |
1990年 | 125篇 |
1989年 | 104篇 |
1988年 | 107篇 |
1987年 | 113篇 |
1986年 | 114篇 |
1985年 | 117篇 |
1984年 | 110篇 |
1983年 | 103篇 |
1982年 | 104篇 |
1981年 | 122篇 |
1980年 | 120篇 |
1979年 | 109篇 |
1978年 | 136篇 |
1977年 | 145篇 |
1976年 | 142篇 |
1975年 | 112篇 |
1974年 | 119篇 |
1973年 | 107篇 |
1972年 | 94篇 |
1971年 | 96篇 |
1969年 | 92篇 |
排序方式: 共有8194条查询结果,搜索用时 359 毫秒
71.
72.
Yu. V. Raskovalov E. M. Tolstikova 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2006,40(4):258-261
A set of measures that can be implemented by the Relay-Protection and Automated-Equipment Service for Centralized Dispatch
Regulation (CDR) in Siberia to determine the location of damage sustained by inter-system 550-and 220-kV transmission lines
maintained by the United Power System (UPS) of Siberia, and the methodology and technology of damage-location determination
(DLD) are described. The damage sustained by the 500-kV high-voltage lines (HL), and the accuracy of DLD relative to zero-sequence
emergency parameters are analyzed statically.
__________
Translated from élektricheskie Stantsii, No. 5, pp. 59–62, May, 2006. 相似文献
73.
N. I. Koronkevich D. A. Eliseev S. V. Yasinskii 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1994,28(8):411-415
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 8, pp. 1–5, August, 1994. 相似文献
74.
M. M. Selyametov O. B. Shevchenko I. É. Vitebskaya E. N. Kosheleva V. M. Danyutin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1992,26(3):137-140
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 3, pp. 6–8, March, 1992. 相似文献
75.
This paper examines the comments submitted by UK companies on 20 proposed accounting standards to test the hypotheses that executives favor standards that increase, or dampen the variance of, accounting profit numbers on which their incentive remuneration is based. Test results were generally as hypothesised but only the profit variance outcomes were statistically significant. Allowing for political environment changes affected only the profit variance results. There was no evidence that the relative monetary size of bonus payments was a significant lobbying factor. No significant differences were found between the lobbying preferences of companies with or without executive incentive schemes. 相似文献
76.
77.
C. N. V. Krishnan 《The Journal of Financial Research》2004,27(4):461-479
I examine the aggregate expected profit generated by informed traders of diverse ability in a competitive market. I assume that efficient traders get perfect information on asset values whereas inefficient traders get noisy information. In the presence of order size restrictions, I show that the aggregate expected profit generated by efficient and inefficient traders together can be higher than that generated by efficient traders alone. Thus, inefficient traders can create value in a constrained trading environment. 相似文献
78.
V. S. Kucheryavyi 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1985,19(9):463-466
Conclusions After the almost 2-yr operation of the gate apparatus since the start of reconstruction of friction units of the vanes, we can make a preliminary evaluation of the effectiveness of the works:There is practically no leakage of water through the gate vanes to the turbine cover, which led to a complete unloading of the drainage pumps on the turbine cover and the efficiency of operating the gate apparatus increased considerably.Repair of the gate apparatus is not required during maintenance.There is no vibration of the gate vanes, since the gaps in the friction units of the journals of the gate vanes are minimum and stable.The operating personnel objectively evaluate highly the work of the gate apparatus of the turbine after reconstruction and will continue this work on the remaining turbines.Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 9, pp. 12–14, September, 1985. 相似文献
79.
Williams V. Gehrlein 《Quality and Quantity》1993,27(1):95-101
Previous research has developed a representation for the Condorcet efficiency of plurality and negative plurality rules on three candidates for large electorates under the impartial culture condition. This study considers the two stage voting rules on three candidates, plurality elimination and negative plurality elimination. A representation is obtained for the Condorcet efficiency of each for large electorates under impartial culture. The Condorcet efficiencies of both rules are equal and are shown to be substantially greater than the Condorcet efficiency of plurality and negative plurality. 相似文献
80.