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   2688篇
  免费   16篇
  国内免费   5篇
教育   1950篇
科学研究   184篇
各国文化   36篇
体育   294篇
综合类   6篇
文化理论   61篇
信息传播   178篇
  2024年   29篇
  2023年   26篇
  2022年   59篇
  2021年   79篇
  2020年   114篇
  2019年   162篇
  2018年   200篇
  2017年   193篇
  2016年   175篇
  2015年   119篇
  2014年   135篇
  2013年   552篇
  2012年   155篇
  2011年   96篇
  2010年   72篇
  2009年   67篇
  2008年   60篇
  2007年   53篇
  2006年   38篇
  2005年   42篇
  2004年   37篇
  2003年   25篇
  2002年   42篇
  2001年   17篇
  2000年   17篇
  1999年   8篇
  1998年   16篇
  1997年   8篇
  1996年   14篇
  1995年   8篇
  1994年   7篇
  1993年   6篇
  1992年   9篇
  1991年   8篇
  1990年   11篇
  1989年   7篇
  1988年   5篇
  1987年   2篇
  1983年   2篇
  1981年   3篇
  1980年   5篇
  1979年   3篇
  1978年   3篇
  1977年   3篇
  1975年   2篇
  1964年   1篇
  1963年   2篇
  1962年   1篇
  1960年   2篇
  1959年   1篇
排序方式: 共有2709条查询结果,搜索用时 29 毫秒
61.
62.
We describe the results of electromigration desalination of two soluble salt-contaminated Galician granites. The efficacy of electromigration, which had not been previously applied to granite, was assessed for two types of granite contaminated with a 20% NaCl solution and seawater. Desalination effectiveness was evaluated as follows: (1) analysis of anode and cathode ion content during testing; (2) analysis of ions at different distances from the electrodes after testing; (3) pH assessment of the stone surfaces; and (4) evaluation of colour changes. Results were very satisfactory; by the end of testing, chloride was reduced by almost 100% in both the NaCl and seawater contaminated samples. Sulfate reduction was also significant, despite this ion's lower mobility. The granite pH values remained close to neutral and colour changes were minimal. The difference in effectiveness of the process for the two types of stone was associated with their dissimilar pore structure.  相似文献   
63.
This paper analyzes the effects that the 2012 VAT rise in Spain had on household’ demand for cultural goods and services. Household’ demands are modeled as a two-stage QUAIDS. After estimating price and expenditure elasticities, and the pass-through parameter associated with the reform, our results show that the individual welfare loss and the increment in the tax bill increase, but less than proportionately, with income. Consequently, the reform can be considered as regressive. Relating the effects of the VAT reform to households’ incomes also implies a low quantitative effect, because of the low proportion of total household expenditure that cultural expenditure represents. From a social perspective, the size of the induced welfare loss would positively depend on society’s inequality aversion. Regardless of the latter, it cannot be concluded whether the reform would have increased or reduced inequality in the distribution of cultural spending. Our results prove qualitatively robust to alternative values of the pass-through parameter.  相似文献   
64.
65.
    
The social processes involved in engaging small groups of 3–15 managers in their sharing, organising, acquiring, creating and using knowledge can be supported with software and facilitator assistance. This paper introduces three such systems that we have used as facilitators to support groups of managers in their social process of decision-making by managing knowledge during face-to-face meetings. The systems include Compendium, Group Explorer (with Decision Explorer) and V*I*S*A. We review these systems for group knowledge management where the aim is for better decision-making, and discuss the principles of deploying each in a group meeting.  相似文献   
66.
67.
    
Although the importance of intellectual capital has already been highlighted in the management literature, few articles have focused on the importance of its green counterpart, green intellectual capital. Nowadays, when environmental concerns cannot be ignored by firms, it is therefore time to explore the role of green intellectual capital in environmental improvement. For that reason, our research aims to explore the relationships between green intellectual capital components and the environmental performance of the firms. In particular, we try to show the importance of green organizational and social capital in the development of environmental product innovations, which are vital to the development and implementation of environmental strategies since, as scholars have pointed out, they generate some of the greatest environmental impacts. The empirical results show that green organizational capital has an indirect impact on environmental product innovation through green social capital, meaning that the latter is a significant mediator of that relationship, and at the same time emphasizing that informal relationships play a key role in the improvement of the environmental performance of the firm and, more specifically, in the development of environmental product innovations.  相似文献   
68.
The governments of cities have to make important decisions on the future of their communities. In the past, the vision, objectives, and goals of cities have been determined mainly by considering tangible assets as the main factors of a city's prosperity. However, in the knowledge economy, the role of intangible assets in wealth creation has become fundamental. As a result, a framework of intangible assets that allows navigation from the present reality to the future vision has become an urgent need for all cities. The paper has two well-defined parts. In the first part, it develops a specific methodology and framework for measuring and managing the intellectual capital of cities. In the second part, the study deals with the practical application of this model of intellectual capital in cities with the specific case of the city of Mataró, providing some details of the first cities’ intellectual capital report.  相似文献   
69.
70.
This paper explores varying configurations of knowledge in organisations. A multi-dimensional framework of distinctive forms of knowledge is used to highlight different patterns of organisational knowledge, demonstrating their heterogeneity and variability – over time, in terms of depth of expertise, and their distribution within and between organisations. Common knowledge that is shared across an organisation accounts for only a small proportion of organisational knowledge, indicating that strategies to exploit this resource for competitive advantage will be constrained unless mechanisms are developed that enable access to and transfer of knowledge that is not yet shared or common.  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