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   4175篇
  免费   154篇
  国内免费   54篇
财政金融   203篇
工业经济   123篇
计划管理   888篇
经济学   562篇
综合类   848篇
运输经济   104篇
旅游经济   266篇
贸易经济   680篇
农业经济   127篇
经济概况   582篇
  2024年   13篇
  2023年   58篇
  2022年   62篇
  2021年   73篇
  2020年   93篇
  2019年   105篇
  2018年   100篇
  2017年   104篇
  2016年   92篇
  2015年   132篇
  2014年   365篇
  2013年   568篇
  2012年   417篇
  2011年   400篇
  2010年   292篇
  2009年   270篇
  2008年   250篇
  2007年   220篇
  2006年   189篇
  2005年   140篇
  2004年   95篇
  2003年   71篇
  2002年   59篇
  2001年   58篇
  2000年   34篇
  1999年   34篇
  1998年   18篇
  1997年   16篇
  1996年   8篇
  1995年   2篇
  1994年   2篇
  1993年   5篇
  1992年   6篇
  1991年   8篇
  1990年   4篇
  1989年   1篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   3篇
  1983年   5篇
  1982年   2篇
  1981年   2篇
  1980年   1篇
  1979年   2篇
  1978年   1篇
排序方式: 共有4383条查询结果,搜索用时 15 毫秒
1.
That survey research is error prone is not a new idea and different varieties of non-sampling error have been investigated in the literature as well as consideration being given in many statistics textbooks to the issue of sampling error. The paper here considers research upon corporate environmental reporting. It compares information provided by corporate environmental reports with information that survey respondents claim their organization’s environmental report contains. This enables the accuracy of the claims to be assessed. Consideration is given to two different industries the Water industry and the Energy industry. Errors due to inaccurate reporting by survey respondents are shown to be relatively infrequent and respondents appear just about as likely to claim they report information that they do not, in fact, report as to fail to indicate that they report information that is, in fact, actually reported.  相似文献   
2.
Based on the unique historical site culture assets, series of culture activities and constructions are held by Taiwan municipal government positively in recent years to raise local strength. Though the city landscape of Taiwan is far away from the traditional one, the comparison and analysis of foundation of cultural industry and the situation of cultural participation should be carried on to find out the real issues in Taiwan's cultural industry and cultural marketing so as to strengthen the ability of local development. This study finds out the resources of culture administration and the social participation in hope for clearing up the matters of Taiwan's cultural industry development, avoiding type Ⅲ errors, and giving suggestions.  相似文献   
3.
We extend the concept of piecewise linear histogram introduced recently by Beirlant, Berlinet and Györfi. The disadvantage of that histogram is that in many models it takes on negative values with probability close to 1. We show that for a wide set of models, the extended class of estimates contains a bona fide density with probability tending to 1 as the sample size n increases to infinity. The mean integrated absolute error in the extended class of estimators decreases with the same rate n–2/5 as in the original narrower class.  相似文献   
4.
It is well known that dropping variables in regression analysis decreases the variance of the least squares (LS) estimator of the remaining parameters. However, after elimination estimates of these parameters are biased, if the full model is correct. In his recent paper, Boscher (1991) showed that the LS-estimator in the special case of a mean shift model (cf. Cook and Weisberg, 1982) which assumes no “outliers” can be considered in the framework of a linear regression model where some variables are deleted. He derived conditions under which this estimator outperforms the LS-estimator of the full model in terms of the mean squared error (MSE)-matrix criterion. We demonstrate that this approach can be extended to the general set-up of dropping variables. Necessary and sufficient conditions for the MSE-matrix superiority of the LS-estimator in the reduced model over that in the full model are derived. We also provide a uniformly most powerful F-statistic for testing the MSE-improvement.  相似文献   
5.
Using news media as a reliable source, we content analyzed stories on business leaders in two major official Chinese newspapers in three different time periods over the past 20 years. Results show that the reform has brought an increase in stories of business leaders, and in coverage of the desirable leadership attributes relating to Confucian virtues, communist ideologies, and modern management philophies. The results suggest that, by publicizing and adorning specific leaders in both government and business sectors in the official media, the government reinforces the traditional values that are consistent with communist ideologies, and at the same time, it also introduces Western management values to suit the current needs of the society. The results of our study echo the findings of empirical studies on Chinese values that used data collected using other methods. We therefore encourage future research to use the printed media as a potentially valuable source of data for tracking changes in social phenomena in a society over time.  相似文献   
6.
本文是“滚齿加工误差分析与检验组”一文的第三部分。这部分的主要内容是分析与研究滚齿加工时产生切向误差(亦称运动偏心)的原因,切向误差的特征,切向误差与检验项目的关系、数学模型等。  相似文献   
7.
以二维坐标系的方式,直观地分析了容差调整过程中流量计误差曲线坐标变化的情况,进而说明了有级容差调整的实质,并结合各专业厂家生产技术的实际情况,说明了调整齿轮选择表的正确使用。  相似文献   
8.
设计了系统的基本思路,在Visual Studio 2008数据库的基础上,利用OpenGL对矿山巷道,硐室设计等进行三维可视化虚拟,并通过数学模型,对矿井设计进行分析与纠错处理,用C#实现系统的功能。  相似文献   
9.
Abstract

When we talk about “City Development, Preservation, and Hospitality”, we do not forget to discuss Chinese Old Brand Enterprises. These enterprises, labeled with distinctive historical character, enjoy high reputation and wide recognition, are very important parts of urban cultural preservation and economic development. Nowadays, China is called an emerging economy in the world. In fact, China has a long history of business tradition for thousands of years. Especially, Chinese Old Brand Enterprises are those that inherit Chinese traditional culture and bear unique techniques, products, and services in their operations. The urban system in most countries is influenced by market forces and enterprises. Cities that produce goods and services that are in demand and attract people to live in them will have faster growth than those that do not.  相似文献   
10.
政府间公共文化财政事权与支出责任划分是基本公共文化服务标准化、均等化的基础性、支柱性保障,当前其划分改革仍存在事权共担模糊性与粗略并存、支出分担概括性与下移并存、财力主导性与保障不足并存,以及省以下划分改革尚未完成等缺憾。划分改革追求“权责清晰、财力协调、区域均衡”的中央与地方财政关系调整目标,但中央与地方的财政分权不能替代省级政府对省以下财政体制改革“负总责”,以及各级地方政府的分级负责。府际协调应坚持中央的统一领导,在省域内落实省级统筹调控功能,并实施地方政府的分级负责,突出“两个积极性”的地方积极性;在体制协调上保持财政事权、支出责任与财力相适应;在机制协调上实施标准化与均等化的衔接配合;在策略协调上强调动态化与确定性的适度平衡。  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