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   1951篇
  免费   100篇
财政金融   344篇
工业经济   51篇
计划管理   489篇
经济学   469篇
综合类   103篇
运输经济   10篇
旅游经济   21篇
贸易经济   170篇
农业经济   205篇
经济概况   189篇
  2025年   3篇
  2024年   11篇
  2023年   17篇
  2022年   22篇
  2021年   23篇
  2020年   40篇
  2019年   30篇
  2018年   27篇
  2017年   33篇
  2016年   35篇
  2015年   35篇
  2014年   77篇
  2013年   73篇
  2012年   67篇
  2011年   694篇
  2010年   78篇
  2009年   64篇
  2008年   96篇
  2007年   52篇
  2006年   65篇
  2005年   51篇
  2004年   32篇
  2003年   47篇
  2002年   32篇
  2001年   45篇
  2000年   39篇
  1999年   62篇
  1998年   62篇
  1997年   65篇
  1996年   64篇
  1995年   1篇
  1994年   3篇
  1992年   3篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
排序方式: 共有2051条查询结果,搜索用时 0 毫秒
51.
根据编码模式生成机理的不同,对单帧编码结构先进行了新分类,分析了技术特点及发展趋势.M阵列编码是一种典型的单帧模式,设计了一种基于M阵列的单帧符号编码结构光模式.重建目标实验表明,可以获得物体较为光滑、完整的三维形廓,丰富、拓展了单帧结构光技术.  相似文献   
52.
论文分析铁路设施项目的一般特点,运用相关基础理论,建立项目可经营性评价体系和模型,对项目的可经营性程度进行定量分析,提出经营性视角下铁路项目区分和投资分类管理方法,科学界定政府和市场的投资职责。最后应用研究的理论成果,对部分铁路设施项目进行了分析。  相似文献   
53.
The financial crisis: What is there to learn?   总被引:1,自引:0,他引:1  
Many are currently studying the origins of the financial crisis in an attempt to answer two seemingly simple questions: why did it happen, and can another crisis be prevented? Those two questions have proved incredibly divisive. The majority opinion of The United States Financial Crisis Inquiry Commission was submitted with two dissenting positions. Furthermore, The 2010 Economic Report of the United States President does not perfectly align with any opinion presented in that report. Few studies, however, provide proper consideration to the evolution of macroeconomic thought and lengthening of the business cycle preceding the current crisis.  相似文献   
54.
I explore CEOs’ incentives to select firm strategies and to acquire firm-specific skills when CEOs have job-hopping opportunities. Several features of managerial compensation, such as benchmarking of pay to larger and more prestigious companies, payments unrelated to past performance, unrestricted stock awards for highly paid CEOs, long-term incentives, and higher pay in companies granting long-term incentives, emerge in the optimal contract. I argue that the model can explain the change in the structure and the surge in US CEO compensation as well as differences across countries and across firms within a country.  相似文献   
55.
This paper examines whether optimal diversification strategies outperform the 1/N strategy in U.K. stock returns. The study focuses on the performance of recent strategies developed by Tu and Zhou (2011) and Kirby and Ostdiek (2010). I find that a number of optimal asset allocation strategies can significantly outperform the 1/N strategy even after adjusting for trading costs. The strategies developed by Kirby and Ostdiek outperform the 1/N strategy, even at higher trading costs, due to the low turnover of these strategies. The strategies of Tu and Zhou have mixed performance after adjusting for trading costs due to the high turnover of these strategies. The results of the paper provide support for the use of optimal diversification strategies.  相似文献   
56.
We prove that multidimensional generalized median voter schemes are coalition-proof. Received: 16 July 1998 / Accepted 23 March 1999  相似文献   
57.
文章应用神经网络的联想记忆功能,以影响软基处理方案选型的技术、施工条件、环境和经济因素分别作为训练标本,建立关于软基处理方案与影响因素的对应关系的BP判定模型,并结合具体工程进行了应用。此方法为软基处理方案选型提供了一条新途径。  相似文献   
58.
我国农产品质量分级标准的现状、不足与对策   总被引:2,自引:0,他引:2  
文章围绕国内外农产品质量分级标准的区别,详细分析了我国农产品质量分级标准的现状,如数量、农产品分级目的、标准格式、依据和原则等,指出了我国农产品质量分级标准在内容、指标以及基础研究等方面的不足,并提出了我国农产品质量分级标准发展的建议。  相似文献   
59.
    
《Economic Systems》2020,44(1):100742
Although EU subsidies aiming at economic development play a pivotal role not only for Hungary but for the entire European Union as well, there is a debate regarding their effectiveness in the literature. This paper investigates the impact of direct economic development subsidies extended in the context of Structural Funds and the Cohesion Fund as part of the 2007–2013 programming period of the European Union on Hungarian micro, small and medium-sized enterprises. Based on a micro database, we evaluate the impact of corporates’ first subsidies on various performance indicators, using a combination of propensity score matching and fixed effects panel regression. According to our results, economic development funds had a significant positive effect on the number of employees, sales revenue, gross value added and, in some cases, operating profit. However, the labour productivity of enterprises was not significantly affected by any of the support schemes. Furthermore, by explicitly comparing non-refundable subsidies (grants) and refundable assistance (financial instruments), we find that there is no significant difference in the effectiveness of the two types of subsidy.  相似文献   
60.
    
An important initial step in accounting is mapping financial transfers to the corresponding accounts. We devised machine-learning-based systems that automate this process. They use word embeddings with character-level features to process transaction texts. When considering 473 companies independently, our approach achieved an average top-1 accuracy of 80.50%, outperforming baselines that exclude the transaction texts or rely on a lexical bag-of-words text representation. We extended the approach to generalizes across companies and even across different corporate sectors. After standardization of the account structures and careful feature engineering, a single classifier trained on 44 companies from 28 sectors achieved a test accuracy of more than 80%. When trained on 43 companies and tested on the remaining one, the system achieved an average performance of 64.62%. This rate increased to nearly 70% when considering only the largest sector.  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