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   15232篇
  免费   300篇
  国内免费   174篇
财政金融   420篇
工业经济   314篇
计划管理   8537篇
经济学   1402篇
综合类   980篇
运输经济   156篇
旅游经济   71篇
贸易经济   2363篇
农业经济   499篇
经济概况   964篇
  2024年   18篇
  2023年   90篇
  2022年   175篇
  2021年   223篇
  2020年   280篇
  2019年   145篇
  2018年   124篇
  2017年   156篇
  2016年   201篇
  2015年   308篇
  2014年   1227篇
  2013年   979篇
  2012年   1406篇
  2011年   1838篇
  2010年   1226篇
  2009年   944篇
  2008年   1713篇
  2007年   1408篇
  2006年   955篇
  2005年   807篇
  2004年   527篇
  2003年   314篇
  2002年   180篇
  2001年   116篇
  2000年   83篇
  1999年   53篇
  1998年   44篇
  1997年   35篇
  1996年   22篇
  1995年   18篇
  1994年   8篇
  1993年   12篇
  1992年   8篇
  1991年   8篇
  1990年   6篇
  1989年   6篇
  1988年   5篇
  1987年   6篇
  1986年   8篇
  1985年   5篇
  1984年   7篇
  1983年   4篇
  1982年   5篇
  1981年   1篇
  1979年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
Land consolidation plays an important role in increasing cultivated land, improving cultivated land quality and the ecological environment, and promoting the coordinated development of urban and rural areas. However, under the conditions of three decades of land consolidation being conducted and changing urban–rural human–land relationship, the areas of improvement in the land consolidation policy of China must be studied. This article analyzes the implementation and distribution characteristics of the land consolidation project completed in Shaanxi Province in 2018. Results show that land consolidation projects in Shaanxi are mainly land reclamation projects, cropland consolidation projects, and high-standard cropland consolidation projects. The increased cultivated land is mainly from land reclamation projects and cropland consolidation projects. The land consolidation projects in Aeolian Plateau Area, Loess Plateau Area, and Da Ba Mountain Area are mainly land reclamation projects. The land reclamation projects in Guan Zhong Plain Area and Qing Ling Mountain Area account for a large proportion. The spatial distribution of rural settlement consolidation projects, and rural settlement consolidation and land reclamation projects are mainly located in Guan Zhong Plain Area and distributed in the boundary area of Guan Zhong Plain Area and Loess Plateau Area. According to the characteristics of land consolidation projects and the changes of urban–rural human–land relationship, China should be prudent in or stop advancing land reclamation to increase cultivated land; cropland consolidation and high-standard cropland construction are vital ways to achieve China’s food security; and rural settlement consolidation should be carefully conducted in remote areas under the background of urbanization.  相似文献   
33.
论文对高职后勤党建与社区党建共驻共建模式的背景及基础进行综述,分析加强社区党建的重要性以及社区党建工作的现状,论述高职后勤党建工作的基础、优势与促进社区共驻共建的重要性,提出高职后勤党建与社区党建共驻共建模式,并对这种共驻共建的模式提出优化思路,以期为现代党建工作提供思路,以供参考。  相似文献   
34.
农产品电商与物流协同将直接影响农产品的流通水平。运用共生理论,剖析了农产品电商与物流的共生关系机理与演化形式。利用微分方程分析了共生关系的演化过程,求解了共生关系的稳定条件。结果表明,协同共生均衡状态下产出水平得到提高,协同共生关系进入理想的稳定状态需要外部引导干预。对2013—2018年中国农产品电商与物流协同度变化的测量结果表明,当前中国农产品电商与物流协同尚处于初级阶段,共生关系表现为非互惠协同共生。  相似文献   
35.
Managing the distribution of fuel in theater requires Army fuel planners to forecast demand at the strategic level to ensure that fuel will be in the right place, at the right time, and in the amounts needed. This work presents a simulation approach to forecasting that accounts for the structure of the supply chain network when aggregating the demand of war fighters across the theater over the forecasting horizon. The resulting empirical distribution of demand at the theater entry point enables planners to identify forecast characteristics that impact their planning process, including the amplitudes and temporal positions of peaks in demand, and the estimated lead time to the point of use. Experimentation indicates that the forecasts are sensitive to the pattern of war fighter demand, the precise structure of the in-theater supply chain network, and the constraints and uncertainty present in the network, all of which are critical planning considerations.  相似文献   
36.
河南省传统村落空间分布特征及影响因素研究   总被引:1,自引:0,他引:1  
[目的]分析河南省传统村落的空间分布特征及其影响因素,以期为中原地区传统村落的建设发展提供指导。[方法]文章通过谷歌地理信息系统及Arc GIS10. 2软件对河南省124个国家级传统村落的空间分布类型、分布格局、分布均衡型及影响因素进行分析,采用最邻近距离法、核密度估计法及地理集中程度等方法揭示其空间分布特征及其形成的影响因素。[结果]最邻近距离法分析R=0. 628,小于1,分布类型为凝聚型。核密度分析中,整体空间分布呈现3个核心区域,平顶山东北区域,豫西北沿省边界呈带状分布及豫南信阳南部,空间分布受地理、经济和文化等因素影响。[结论]河南省传统村落的空间分布属凝聚型不均衡分布。从地级市层面上分析,主要集中在平顶山东部、信阳南部和三门峡地区;从分区层面上,以豫中较多,豫北、豫西和豫南其次,豫东基本空白。形成原因与地理高程、社会经济和历史事件有关。交通不便、经济相对发达或相对落后、历史事件少发的区域,传统村落保存较为完整。  相似文献   
37.
The purpose of this study is to examine tourism demand for Singapore from 1995 to 2013 by six major origin countries which belong to three different regions. Unlike prior tourism research, we take into account the dependence relations among the different tourist flows via copula. Copula is a statistical model of dependence and measurement of association. Specifically, we investigate the association between two tourist flows in each region. Based on empirical copula estimation, the Frank function has been identified as the most appropriate to capture the pairwise dependence structures of tourist flows. The copula-based approach combined with econometric models is proposed for tourism demand analysis that can be used to predict tourist arrivals. We apply the copula-ARDL and copula-ECM frameworks to generate joint forecasts of tourist arrivals from three regions. The findings show that the forecast performance of the Frank copula-based model outperforms the benchmark model which corresponds to the independence structure (no association) of tourist flows.  相似文献   
38.
随着数字技术的不断迭代创新,数字经济也在快速发展,作为主要生产性服务业的物流产业也逐渐由传统物流、现代物流向智慧物流过渡。本文首先分析了河北省发展智慧物流的必要性,然后对河北省智慧物流体系构建的影响因素进行PEST-SWOT矩阵分析,最后提出构建河北省智慧物流体系的战略和路径。  相似文献   
39.
Abstract

The U.S. economy is addicted to the simulative impacts of household borrowing. Household debt has grown dramatically since the 1990s and has served to mitigate the detrimental effects of stagnant household wages. The accumulation of this debt has also had the macroeconomic impact of stimulating the economy, pushing it closer towards full employment. However does full employment stimulated by household indebtedness actually represent economic progress? It is argued that even the poorest citizen in a modern industrialized society is better off than a king of feudal Europe, yet in the United States such material prosperity is often tied to social insecurity thanks to debt. The growth of this debt has been enabled by a financial system that has evolved dramatically over the past forty years. The U.S. financial system’s primary role is no longer to finance investment but is rather a tool that enables a separation of ownership from use. Debt has fueled corporate profits which have enriched the shareholding class while at the same time the system has reduced the financial security of the majority of workers. This article crystalizes these issues by analyzing the differentials in financial circumstances faced by workers and shareholders in several major U.S. firms.  相似文献   
40.
Utilizing age-period-cohort analysis, this paper examines the development of income distribution across periodic economic fluctuations in relation to cohorts and age groups. The empirical analysis is based on the Finnish Income Distribution Statistics and Household Expenditure Surveys covering the period of 1966–2015. The findings suggest that the period and cohort effects can be identified as the main effects on relative income, while the age effects have no meaningful impact when the control variables are taken into account. This result reveals a connection between the effects of economic shocks and cohort placement on labor market entry. Additionally, absolute income analysis suggests that economic shocks create stagnation points in income development, which are especially detrimental to cohorts who are transitioning into labor markets. Additionally, middle-income attainment has not changed due to periodic shocks but rather is related to inter-cohort inequalities and relative income differences, where the baby boomer generation is a clear winner.  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