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   17289篇
  免费   11篇
财政金融   2724篇
工业经济   802篇
计划管理   2675篇
经济学   3962篇
综合类   488篇
运输经济   12篇
旅游经济   12篇
贸易经济   4584篇
农业经济   37篇
经济概况   1388篇
信息产业经济   44篇
邮电经济   572篇
  2023年   4篇
  2021年   4篇
  2020年   11篇
  2019年   16篇
  2018年   2310篇
  2017年   2064篇
  2016年   1217篇
  2015年   93篇
  2014年   100篇
  2013年   119篇
  2012年   468篇
  2011年   1961篇
  2010年   1831篇
  2009年   1533篇
  2008年   1528篇
  2007年   1881篇
  2006年   76篇
  2005年   394篇
  2004年   475篇
  2003年   565篇
  2002年   260篇
  2001年   76篇
  2000年   63篇
  1999年   11篇
  1998年   26篇
  1997年   8篇
  1996年   26篇
  1995年   7篇
  1994年   7篇
  1993年   5篇
  1992年   11篇
  1990年   8篇
  1989年   5篇
  1988年   4篇
  1987年   7篇
  1986年   25篇
  1985年   7篇
  1984年   6篇
  1983年   12篇
  1982年   11篇
  1981年   10篇
  1980年   7篇
  1979年   5篇
  1978年   7篇
  1977年   6篇
  1976年   4篇
  1975年   3篇
  1974年   9篇
  1969年   2篇
  1968年   3篇
排序方式: 共有10000条查询结果,搜索用时 750 毫秒
921.
922.
Multi-purpose recreation facilities (MPRFs) are a popular setting for physical activity and it is therefore important that they are safe for all patrons. However, the attitudes of MPRF users towards safety are a potential barrier to the success of injury prevention programmes implemented within MPRFs. This article reports a survey of the safety attitudes of over 700 users of four indoor MPRFs. Factor analysis of 12 five-point Likert scale statements showed that the attitudes clustered around three major dimensions - the importance of safety, the benefits of safety and the perceptions of injury risk. Together, these three dimensions accounted for 49% of the variability in the attitudes. More than 85% of respondents agreed/strongly agreed that: safety was an important aspect of physical activity participation; being injured affected enjoyment of physical activity; people should adopt appropriate safety measures for all physical activity; and individuals were responsible for their own safety. The MPRF users, particularly women and older people, were generally safety conscious, believed in adopting safety measures, and were willing to take responsibility for their own safety. Facility managers can be confident that if they provide evidence-based injury prevention interventions in these settings, then users will respond appropriately and adopt the promoted behaviours.  相似文献   
923.

Literaturhinweise

Customer centric company  相似文献   
924.
925.
926.
927.
Over 90 percent of companies are estimated to use IT Service Management (ITSM) frameworks, yet there is little research on their benefits to the Information Technology (IT) department and the business units. An international survey of 491 firms was conducted to assess the benefits of the IT Infrastructure Library (ITIL), the de-facto ITSM framework, specifically on how these benefits evolve as companies increase their adoption of the ITIL model. Also studied are the perception of challenges of the implementation and the number of ITIL processes implemented in relation to the progress of the adoption of ITIL. Results indicate that as the maturity of implementation increases, the perception of challenges decreases. Findings also show that as the maturity of implementation increases, the number of realized benefits increases, as well as the number of implemented ITIL processes. Implications for practitioners and researchers are also discussed.  相似文献   
928.
929.
Empirical Evaluation of Fair Use Flat Rate Strategies for Mobile Internet   总被引:2,自引:1,他引:1  
The fair use flat rate is a promising tariff concept for the mobile telecommunication industry. Similar to classical flat rates it allows unlimited usage at a fixed monthly fee. Contrary to classical flat rates it limits the access speed once a certain usage threshold is exceeded. Due to the current global roll-out of the LTE (Long Term Evolution) technology and the related economic changes for telecommunication providers, the application of fair use flat rates needs a reassessment. We therefore propose a simulation model to evaluate different pricing strategies and their contribution margin impact. The key input element of the model is provided by so-called discrete choice experiments that allow the estimation of customer preferences.  相似文献   
930.
The paper examines the current state of research as regards the eXtensible Business Reporting Language (XBRL) by using the literature review methodology. The results show that an empirical-quantitative research design is used most of the time. The contributions vary in substance in terms of research on XBRL and research with XBRL. Research with XBRL focuses on the development of conceptual XBRL extensions. Work on XBRL considers, for example, the changes in reporting as a result of XBRL as well as the acceptance and enforcement of financial reporting standards. The results point to open issues and are relevant for research and practice.  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