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   381篇
  免费   31篇
  国内免费   2篇
财政金融   15篇
工业经济   29篇
计划管理   174篇
经济学   38篇
综合类   17篇
运输经济   12篇
旅游经济   5篇
贸易经济   83篇
农业经济   21篇
经济概况   20篇
  2024年   4篇
  2023年   5篇
  2022年   9篇
  2021年   13篇
  2020年   14篇
  2019年   16篇
  2018年   11篇
  2017年   18篇
  2016年   22篇
  2015年   25篇
  2014年   33篇
  2013年   62篇
  2012年   30篇
  2011年   32篇
  2010年   33篇
  2009年   23篇
  2008年   15篇
  2007年   12篇
  2006年   14篇
  2005年   7篇
  2004年   5篇
  2003年   4篇
  2002年   1篇
  2001年   1篇
  1999年   2篇
  1997年   2篇
  1995年   1篇
排序方式: 共有414条查询结果,搜索用时 15 毫秒
1.
Hybrid organisations present important theoretical and managerial opportunities. We examine a large Finnish multichain retail organisation in order to identify and understand the challenges of hybrids in a retailing context. We are especially interested in how these complex firms try to maintain a balance between the centralised corporate control and the local autonomy and initiative of their retailers. The governance forms and processes identified in the case organisation are discussed with the help of a proposed conceptual framework. We believe that the identified governance problems and practices in the three different retail chains and especially our recommendations will facilitate the understanding of retail hybrid organisations and the management of hybrids in general.  相似文献   
2.
基于复杂供应链库存管理策略的系统动力学研究   总被引:4,自引:0,他引:4  
在分析了具有不同提前期和加工时间的复杂供应链特点基础上,研究了混合CONWIP/Kanban库存管理思想与同步CONWIP库存管理思想在复杂供应链上的应用。同时借助Vensim建模平台。针对这两种管理思想建立了基于复杂供应链系统的动态仿真模型,并对模拟结果进行了分析。  相似文献   
3.
We examine the pricing difference of Green Bonds (GB) and conventional bonds (CBs) in capital markets worldwide. Credit spread is used to observe whether investors would like to pay a premium for GBs over CBs. This study uses panel data regression with hybrid model to analyse daily observations over the period 2016 to 2017. We employ Option-Adjusted spread (OAS) to measure the credit spreads of bonds while controlling for bond specific, macroeconomic and global factors that influence the spread. With the hybrid model used in the panel data analysis, we were able to capture the fixed-effects of variables in a random effect model. We find that GBs are traded at a premium of 63 basis points (BPS), compared with a comparable corporate bond issue. We find that the green label provides issuers an incentive to raise funds through issuing GBs while providing investors an opportunity to diversify their investments returns. Our findings provide several implications to the major stakeholders driving the GB market to scale up the market to finance the required level of global green investment needs. We stress an urgent need to support the growth of the GB market to achieve sustainable development through mitigating climate change challenges.

Abbreviation GB: Green Bond; CB: Conventional Bond; YS: Yield Spread; BPS: Basis Points; OAS: Option-Adjusted Spread; PCSE: Panels Corrected Standard Errors; CPI: Consumer Price Index; GBPs: Green Bond Principles; CBS: Climate Bond Standard  相似文献   
4.
The U.S. Departments of Agriculture and Energyjointly analyzed the economic potential for,and impacts of, large-scale bioenergy cropproduction in the United States. Anagricultural sector model (POLYSYS) wasmodified to include three potential bioenergycrops (switchgrass, hybrid poplar, and willow). At farmgate prices of US $2.44/GJ, anestimated 17 million hectares of bioenergycrops, annually yielding 171 million dry Mg ofbiomass, could potentially be produced at aprofit greater than existing agricultural usesfor the land. The estimate assumes highproductivity management practices are permittedon Conservation Reserve Program lands. Traditional crops prices are estimated toincrease 9 to 14 percent above baseline pricesand farm income increases annually by US $6.0billion above baseline.At farmgate prices of US $1.83/GJ, anestimated 7.9 million hectares of bioenergycrops, annually yielding 55 million dry Mg ofbiomass, could potentially be produced at aprofit greater than existing agricultural usesfor the land. The estimate assumes managementpractices intended to achieve highenvironmental benefits on Conservation ReserveProgram lands. Traditional crops prices areestimated to increase 4 to 9 percent abovebaseline prices and farm income increasesannually by US $2.8 billion above baseline.  相似文献   
5.
This paper investigates hybrid inflation‐price‐level targeting (HT), employing a Phillips curve with output persistence. By HT we mean that a central bank targets a weighted average of the optimal inflation rate and its corresponding price level. The analysis shows that if output is persistent to some extent, it is desirable to adopt HT because, relative to the case of alternative regimes such as inflation targeting (IT) and price‐level targeting (PT), it will reduce the variability of inflation and thereby social loss. In addition, it is shown that the optimal hybrid‐type target is uniquely determined according to the degree of persistence in output.  相似文献   
6.
基于混合优化算法的带时间窗的车辆调度问题求解研究   总被引:1,自引:0,他引:1  
论文建立了带时间窗的车辆调度问题的数学模型,并针对遗传算法在局部搜索能力方面的不足,提出将模拟退火算法与遗传算法相结合,从而构造了求解车辆调度问题的混合优化算法,并进行了实验计算。计算结果表明,用这种混合优化算法求解车辆调度问题,可以在一定程度上用模拟退火算法突跳性克服遗传算法在局部搜索能力方面的不足,从而得到质量较高的解。  相似文献   
7.
袁文来 《价值工程》2015,(11):122-123
本文主要以中石化中原建设工程有限公司承建的海西天然气管网二期工程-后路隧道工程为例,分析研究大坡度、小断面隧道施工中的控制重点、难点及相关处理措施,并通过对隧道开挖的重点环节进行分析研究来确定相应的应对措施,旨在为今后类似情况的隧道施工提供科学依据。  相似文献   
8.
笔者以新建兰渝铁路六标段花石隧道为例,对该隧道的应有的通风设计,结合现有通风方式的弊端和改进,进行浅要的比较分析,在此基础上对同类型隧道的通风选型进行总结。  相似文献   
9.
Sustainable entrepreneurship contributes to solving social and environmental problems through the means of successful for‐profit businesses. This paper contributes to understanding how sustainable entrepreneurship is implemented by exploring an emerging new form of business, ‘B Corps’, that employs market tactics to address social and environmental issues. Through interviewing 14 B Corps, the exploratory research study found that B Corps treat profit as a means to achieve positive societal ends, they regard the B Corp model as a tool for change, the B Corp model provides a common collective identity for internal and external validation, they are focused on societal impact rather than maximizing profits and they attempt to legitimate this form of sustainable entrepreneurship by influencing the business community and government officials. Copyright © 2016 John Wiley & Sons, Ltd and ERP Environment  相似文献   
10.
Charitable foundations and government programmes should endeavour to allocate their limited resources to best serve their constituents. Yet, mathematical programming techniques are rarely used despite overwhelming evidence of their superiority in selecting projects that yield higher levels of total benefits. We present a novel ‘hybrid selection model’ that combines binary linear programming and heuristic rank-based models applied to two case studies. The first case focuses on providing services to women and shows a hybrid model would have selected the top three ‘signature’ projects and maintained an above-average overall project benefit while securing a 180% improvement in the number of projects funded, a 66% improvement in the number of women served and a 132% improvement in the total benefit achieved. In the second case, we apply the hybrid approach to data from the US government’s largest forest preservation programme and demonstrate that the hybrid approach could allow the programme to select up to 11 top-scoring projects while still achieving a 97% gain in the total overall benefit compared to their traditional method. These case studies show that the hybrid approach has the potential to be applied in a variety of settings and improve how foundations and programmes achieve their goals.  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