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   1216篇
  免费   59篇
  国内免费   9篇
财政金融   57篇
工业经济   81篇
计划管理   404篇
经济学   143篇
综合类   170篇
运输经济   12篇
旅游经济   8篇
贸易经济   194篇
农业经济   109篇
经济概况   106篇
  2024年   1篇
  2023年   10篇
  2022年   16篇
  2021年   29篇
  2020年   34篇
  2019年   16篇
  2018年   10篇
  2017年   15篇
  2016年   36篇
  2015年   36篇
  2014年   91篇
  2013年   82篇
  2012年   114篇
  2011年   126篇
  2010年   103篇
  2009年   62篇
  2008年   85篇
  2007年   98篇
  2006年   84篇
  2005年   50篇
  2004年   43篇
  2003年   35篇
  2002年   30篇
  2001年   19篇
  2000年   18篇
  1999年   11篇
  1998年   5篇
  1997年   5篇
  1996年   5篇
  1995年   5篇
  1994年   2篇
  1993年   3篇
  1992年   1篇
  1991年   1篇
  1986年   1篇
  1982年   1篇
  1979年   1篇
排序方式: 共有1284条查询结果,搜索用时 15 毫秒
1.
本文采用SWOT分析法对舟山工业仓储用岛开发利用的优势、劣势、机遇和挑战进行定性分析,再通过AHP法进行定量分析,构建SWOT-AHP模型。通过计算舟山工业仓储用岛开发利用策略四边形,确定舟山工业仓储用岛开发利用应选择开拓型战略,即发挥自身优势、抓住外部机遇。  相似文献   
2.
绿地有一定的雨洪调蓄功能,雨洪状况下,如何在汇水系统尺度利用和保护绿地亟待研究。选取95处位于武汉港西汇水系统的地块,调研地块性质,利用ArcGIS提取不透水比例及平均坡度,并进行SWMM水文模型演算。通过实验性模拟结果的对比,得出汇水系统的绿地雨洪调蓄效率(λ=0.13m3/m2)、汇水系统(g=36%)和各类用地(g=18%~47%)基于雨水调蓄理念下的最低绿地率,使汇水系统水文状况达到海绵城市建设标准。讨论了不同重现期下汇水系统的绿地雨洪调蓄效能,旨在完善绿地雨洪调蓄的研究方法、指标体系及利用与保护策略,为相关研究与实践提供借鉴。  相似文献   
3.
ABSTRACT

Storage is one of the most important aspects of IT infrastructure for various enterprises. But, enterprises are interested in more than just data storage; they are interested in such things as more reliable data protection, higher performance and reduced resource consumption. Traditional enterprise-grade storage satisfies these requirements at high cost. It is because traditional enterprise-grade storage is usually designed and constructed by customised field-programmable gate array to achieve high-end functionality. However, in this ever-changing environment, enterprises request storage with more flexible deployment and at lower cost. Moreover, the rise of new application fields, such as social media, big data, video streaming service etc., makes operational tasks for administrators more complex. In this article, a new storage system called intelligent software-defined storage (iSDS), based on software-defined storage, is described. More specifically, this approach advocates using software to replace features provided by traditional customised chips. To alleviate the management burden, it also advocates applying machine learning to automatically configure storage to meet dynamic requirements of workloads running on storage. This article focuses on the analysis feature of iSDS cluster by detailing its architecture and design.  相似文献   
4.
[目的]利用内蒙古自治区乌兰察布丰镇市、凉城县、兴和县,辽宁省朝阳市朝阳县411个农户调查数据,分析玉米收储制度改革背景下北方旱作区农户杂粮种植影响因素。[方法]首先对户主个人特征、家庭禀赋两个一般影响因素进行分析,然后重点对自然和社会资源特征、市场环境、政策环境3个影响因素进行分析。[结果](1)由于户主年龄偏大且文化程度较低、户均从事农业生产的劳动力数量和拥有的耕地面积都较少,农户面对玉米市场价格下跌改种其他农作物的能力较弱;(2)尽管农户普遍认同杂粮适合当地自然条件,但是缺乏企业带动,订单种植杂粮的比例较低,农户种植杂粮存在较高的销售风险;(3)虽然农户普遍预期玉米市场价格持平和走低,但是多数农户对杂粮市场价格没有明确预期,杂粮收益存在较高的不确定性;(4)农户普遍不了解玉米收储制度改革的具体内容,且绝大部分农户没有获得杂粮生产支持,不利于引导农户种植杂粮。[结论]应从加强政策宣传、扶持杂粮加工龙头企业、扩大杂粮补贴范围等方面着手,引导北方旱作区农户种植杂粮,减少玉米收储制度改革对其收入的冲击。  相似文献   
5.
The boundary conditions of supply chain integration (SCI) have been widely studied in order to find out when SCI is applicable and effective. However, prior studies have mainly focused on external contextual factors, such as supply complexity, environmental uncertainty and country-level infrastructure. This study contributes to the SCI literature by examining the contingency effects of internal production systems on the relationship between supplier integration, customer integration and operational performance. Based on organizational information processing theory, we provide evidence to show that the impact of supplier and customer integration on operational performance varies across production systems, such as one-of-a-kind production, batch production and mass production systems. The empirical results also reveal how supplier and customer integration can be matched with different configurations of production systems in order to achieve the desired quality, flexibility, delivery or cost performance.  相似文献   
6.
王蕾 《科技和产业》2019,19(8):49-53
梳理国内外动力和储能电池产业发展情况,从产业规模、重点企业、产业链、培养方向等角度剖析了泰州市动力和储能电池产业的现状问题,并针对性地提出了发展建议。  相似文献   
7.
中国铁路交通发展对沿线城市经济增长趋同的影响   总被引:1,自引:0,他引:1  
以1997—2011年中国6次铁路提速和高铁开通为背景,在β趋同模型中加入用可达性度量的铁路交通发展因素,并用频次加权平均旅行时间衡量可达性,从全国、区域和城市3个空间层次分析了中国铁路交通发展对铁路沿线城市经济增长趋同的影响。结果显示:铁路交通发展对全国、东部地区、东北地区以及提速铁路沿线城市的经济增长的β趋同均有促进作用,对西部地区铁路沿线城市经济增长的β趋同有阻碍作用,而铁路交通发展对非提速铁路沿线城市经济增长的β趋同的影响甚微,对中部地区铁路沿线城市经济增长的β趋同的影响不确定。  相似文献   
8.
In this paper, we empirically investigate the effects of monetary policy shocks on exchange rates in Asian countries. To do so, we use VAR models which impose sign restrictions on impulse responses to identify monetary policy shocks. We find that contractionary monetary policy shocks lead to significant exchange rate appreciation in Malaysia, the People’s Republic of China, and the Republic of Korea. However, in India, Indonesia, the Philippines and Thailand, we find either a significant depreciation or no significant effect. These results suggest that an interest rate increase (or decrease) may not necessarily shield Asian countries from exchange rate depreciation (or appreciation) pressure following a U.S. interest rate increase (or decrease).  相似文献   
9.
Kenya's fiscal policy landscape is characterized by primary deficit spending forcing the government to rely on debt to meet its objectives. The justification often being that as a developing economy, annual growth rates and future prospects may in the short run justify the uptake of debt to finance infrastructural development. However, given potential fiscal limits, fiscal cycles usually alternates between sustainable and unsustainable regimes and this has a bearing on long run sustainability. This study therefore sought to investigate the nature of fiscal policy regime in Kenya and the extent to which fiscal policy is sustainable in the long run taking into account periodic regime shifts. Markov switching models were used to endogenously determine fiscal policy regimes. Regime switching tests were used to test whether No-Ponzi game condition and debt stabilizing condition were met. The results established that regime switching model was suitable in explaining regime sustainable and unsustainable cycles. An investigation of fiscal policy regimes established that both sustainable and unsustainable regimes were dominant, and each lasted for an average of four years. There was evidence to imply the existence of procyclical fiscal policy in Kenya. Regime switching tests for long run sustainability suggested that the No-Ponzi game condition weakly holds in the Kenyan economy. Regime-based sensitivity analysis indicated that persistence of unsustainability regime for more than 4 years could threaten long-run fiscal sustainability.  相似文献   
10.
粮食仓储作为中国历史发展中的重要载体,对于社会的繁荣、稳定和发展具有重要意义。本文主要论述了中国古代和现代粮食仓储的发展历史及其价值,并对粮食仓储未来的发展进行展望。  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