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   76193篇
  免费   1990篇
  国内免费   1390篇
财政金融   5975篇
工业经济   3050篇
计划管理   15361篇
经济学   13298篇
综合类   14534篇
运输经济   453篇
旅游经济   1237篇
贸易经济   9467篇
农业经济   5676篇
经济概况   10519篇
信息产业经济   3篇
  2024年   207篇
  2023年   773篇
  2022年   970篇
  2021年   1416篇
  2020年   1899篇
  2019年   1264篇
  2018年   1190篇
  2017年   1354篇
  2016年   1465篇
  2015年   1883篇
  2014年   4514篇
  2013年   5137篇
  2012年   6076篇
  2011年   7933篇
  2010年   5933篇
  2009年   5320篇
  2008年   5930篇
  2007年   5510篇
  2006年   5472篇
  2005年   3935篇
  2004年   2848篇
  2003年   2317篇
  2002年   1492篇
  2001年   1358篇
  2000年   894篇
  1999年   445篇
  1998年   229篇
  1997年   247篇
  1996年   187篇
  1995年   104篇
  1994年   81篇
  1993年   87篇
  1992年   62篇
  1991年   43篇
  1990年   42篇
  1989年   30篇
  1988年   21篇
  1987年   12篇
  1986年   16篇
  1985年   184篇
  1984年   203篇
  1983年   145篇
  1982年   104篇
  1981年   58篇
  1980年   73篇
  1979年   46篇
  1978年   38篇
  1977年   23篇
  1975年   1篇
  1973年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
介绍了电镀镍污泥浸出工艺中氨回收的工艺流程、使用原材料和各单元操作,并对各单元操作的技术条件进行了理论分析和实践检验.  相似文献   
32.
国资监督机构在深化国资国企过程中应集中调配产权权益,完善资产负债结构,优化资源配置,通过资本运营和良好的市场环境,充分发挥中央和地方政府的职能,在互为尊重的前提下,杜绝侵权行为的发生。  相似文献   
33.
This paper is focused on the cost of raising capital in Germany. A cross-sectional analysis of flotation cost data for 117 IPOs over the years 1993–1998 is presented. We find average flotation costs to be 7.77 percent of gross proceeds, while underwriting fees average 5.01 percent. Our results extend the literature in two important directions. First, contrary to the conventional economies of scale view we find marginal spreads to be rather constant in gross proceeds and to be higher for more risky and more complex offerings. Fixed costs amount to 5 to 9 percent of underwriting fees. Second, by applying a principal component analysis we find issue size, an issuer risk factor, and an offering method complexity factor to have an economicaly meaningful impact on underwriting fees.  相似文献   
34.
The model of public policy studied in this paper has heterogeneous citizens/voters and two public goods: one (roads) chosen directly by an elected policy‐maker, and the other (pollution) stochastically dependent on the amount of roads. Both a one‐country and a two‐country version of the model are analyzed; the latter displays externalities across the countries which create incentives for free riding and strategic delegation. The welfare effects of providing the policy‐maker with information about the relationship between roads and pollution are investigated, and it is shown that more information hurts some—sometimes even all—citizens. In particular, the opportunity not to create an institution for information gathering can serve as a commitment device for a country, although with the unfortunate effect of making the overall outcome even worse. Implications for the welfare effects of “informational lobbying” are also discussed.  相似文献   
35.
刘卫国  曾凡奇 《价值工程》2004,23(1):115-118
本文针对电子商务条件下现代物流的新特点和我国物流现状,提出在新的条件下选择适合我国国情的物流模式,即综合物流代理模式。它是由一家在物流管理经验、人才和技术上均有一定优势的企业通过建立一个综合物流代理的管理体系,对电子商务交易中供求双方的所有物流活动进行全权代理的业务活动模式。  相似文献   
36.
It is still disputed whether foresight exercises should be based on top-expert assessments or on a broader base of less specialised experts, and whether the self-rating of experts is an acceptable method. Using the German 1993 and the Austrian 1998 Technology Delphis, this study addresses both questions. Self-rating is, in fact, an appropriate method for selecting experts. But the assessment of self-rated top experts tend to suffer from an optimism bias due to the experts' involvement and their underestimation of realisation and diffusion problems. The degree of optimism is positively correlated with the degree of self-rated knowledge, and it is more pronounced for the least pioneering and for organizational innovations. Experts with top self-ratings working in business have a stronger optimism bias than those working in the academia or in the administration: Consistent with the insider hypothesis, they are most optimistic with regard to realisation, innovativeness, and potential leadership in economic exploitation. Given the optimism bias, foresight exercises should base their panels on a fair mixture of experts of different grades, with different types of knowledge and affiliation, and not only on top specialists of the respective field. Delphi-type exercises, therefore, offer an advantage relative to forum groups or small panels of specialists.  相似文献   
37.
Based on a contingent perspective of accounting change, this paper reviews the historical development of differential reporting in Germany, by drawing on primary and secondary sources. The main objective of the paper is to shed light on the driving forces and main influential parameters that have shaped the existing differential reporting framework. This historical approach supplies interesting insights for the current discussion on differential reporting in Germany produced by the EU Regulation on the application of International Accounting Standards.  相似文献   
38.
The comparison of true cost of living indices between demographically different households (relative equivalence scale) is argued to be sensitive to the way demographic characteristics enter demand analysis. In particular, parameters reflecting the cost of demographic characteristics at base prices, though themselves do not have welfare (equivalence scale) interpretation, can alter the benchmark from which demographically varying inflation effects are measured. The empirical analysis, based on a rank‐3 demand system applied to UK individual household data, shows that the inflation adjustment of child benefits can vary with the way demographic costs at base period prices are specified.  相似文献   
39.
襄樊北站驼峰自动化控制系统于2001年11月28日正式投入运用,根据该系统在运用中出现的问题及产生原因,通过采用自动化驼峰作业预想控制法,将人的作业经验与自动化精确控制相结合,取得了扬长避短充分发挥自动控制作用、提高编组站驼峰作业能力的效果。  相似文献   
40.
唐代的法制思想,主要有两大特征,即仁刑恤典和厉行法制。对此,学者们多从正史的角度加以探讨和分析。而从敦煌所出唐代蒙书《百行章》所述内容同样清楚地显示了唐初的法制思想的以上特点。这一研究可以起到补充正史的作用。  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