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   2738篇
  免费   52篇
  国内免费   83篇
教育   1556篇
科学研究   688篇
各国文化   3篇
体育   98篇
综合类   109篇
文化理论   3篇
信息传播   416篇
  2024年   2篇
  2023年   30篇
  2022年   23篇
  2021年   32篇
  2020年   67篇
  2019年   72篇
  2018年   76篇
  2017年   87篇
  2016年   65篇
  2015年   64篇
  2014年   148篇
  2013年   392篇
  2012年   184篇
  2011年   166篇
  2010年   138篇
  2009年   146篇
  2008年   135篇
  2007年   186篇
  2006年   153篇
  2005年   144篇
  2004年   122篇
  2003年   95篇
  2002年   73篇
  2001年   73篇
  2000年   44篇
  1999年   27篇
  1998年   24篇
  1997年   29篇
  1996年   21篇
  1995年   8篇
  1994年   7篇
  1993年   12篇
  1992年   6篇
  1991年   5篇
  1990年   10篇
  1989年   3篇
  1988年   3篇
  1985年   1篇
排序方式: 共有2873条查询结果,搜索用时 15 毫秒
61.
资源型城市建立与完善技术创新系统的探讨   总被引:4,自引:0,他引:4  
王元月  纪建悦 《软科学》2002,16(1):10-13,37
本文首先指出技术创新系统对于资源型城市的产业转型及城市的可持续发展的重要性及现实意义,然后分析了我国的资源型城市建立与完善技术创新系统存在的难点与问题。在此基础上,提出了设想中的资源型城市技术创新系统的结构,最后,给出了建立和完善技术创新系统的对策与建议。  相似文献   
62.
Based on a survey of Chinese publicly traded firms, we report on the status of the strategic information systems planning success in China. Through this analysis of the survey data, we found that Chinese managers are not using IS as a competitive weapon though they have already realized some aspects of strategic information system planning. We also examined the differences between Eastern and Western cultural and political context factors to explain this phenomenon.  相似文献   
63.
为了保障机载无线电设备的正常工作,完成对机载无线电设备进行定期检测和维修,我们提出了机载无线电设备测试系统的一种优化设计,配合软件系统以后,使大部分信号分析比较,以及对输入信号,电源控制等方面充分实现智能化,本文主要介绍了用Protel99来实现此机载无线电设备综合检测系统的硬件设计方案以及基本设计框图。  相似文献   
64.
支持企业隐性知识交流与转化的IT系统   总被引:4,自引:0,他引:4  
公茂星  刘红丽 《现代情报》2006,26(11):187-190
本文介绍了隐性知识的内涵及其交流与转化的概念,通过对IT在隐性知识交流与转化中的作用分析,构建了一个支持企业隐性知识交流和转化的IT系统框架,并对该系统框架中各个模块的功能及其隐性知识库进行了详细的探讨。  相似文献   
65.
推荐系统在高校数字图书馆的应用研究   总被引:5,自引:0,他引:5  
谢琳惠 《现代情报》2006,26(11):72-74
信息时代,数字图书馆连渐成为满足图书馆用户个性化服务的主要解决方案。本文在描述高校数字图书馆个性化服务的概念及其特点后,提出使用电子商务中的推荐系统采帮助实现高校数字图书馆的个性化服务的论点。文章中建立了高校数字图书馆推荐系统的框架模型.井在此基础上对高校数字图书馆推荐系统的组成、处理、以及推荐结果的形式进行了探讨,指出了适合本系统的推荐算法。  相似文献   
66.
Marcus Wagner   《Research Policy》2007,36(10):1587-1602
This paper analyses empirically the relationship between environmental innovations, environmental management and patenting. In particular it tests a number of propositions on how environmental management systems and the interaction with environmentally more or less concerned stakeholders are associated with the probability of firms to pursue innovation in general (measured as patenting behaviour) and specifically environmental innovation (measured based on firm self-assessment and through patent data). In applying a negative binomial as well as binary discrete choice models the relationship is studied using data on German manufacturing firms. As a novel and important insight, the study finds that environmental innovation can be meaningfully identified using patent data and that environmental innovation defined this way is less ubiquitous than self-reported environmental innovation. It also reveals that the implementation level of environmental management systems has a positive effect exclusively on environmental process innovation, whereas it is negatively associated with the level of a firms’ general patenting activities. For environmental product innovation and patented environmental innovations a positive relationship with environmentally concerned and a negative link with environmentally neutral stakeholders is found.  相似文献   
67.
The purpose of this paper is to elaborate an evolutionary perspective on the process of structural change that has characterized the banking industry in the United Kingdom (UK). For this purpose, the evolution of retail financial services is contrasted against the backdrop of the implementation and development of information and communication technologies (ICTs). The paper delves into the sources and the effects of technological change in banking over a long-term perspective (1840s-1990s) to point out the significance of the opportunities and the constraints that have shaped the growth and development of this industry. This is interpreted as a three-stage evolutionary process driven by intertemporal coordination across several complementary domains, including activities of production, business organization, consumption and the underlying regulatory setting. It is concluded that the evolution of UK retail banking displays the characteristics of a distributed process of innovation in which developers of technologies, service suppliers and customers contribute to the process of structural change of the industry.  相似文献   
68.
Innovation has moved to the foreground in regional policy in the last decade. Concrete policies were shaped by “best practice models” derived from high-tech areas and well performing regions. These are often applied in a similar way across many types of regions. Here an attempt is made to show that there is no “ideal model” for innovation policy as innovation activities differ strongly between central, peripheral and old industrial areas. In this paper we analyse different types of regions with respect to their preconditions for innovation, networking and innovation barriers. Based on this classification different policy options and strategies are developed.  相似文献   
69.
This paper develops a theoretical framework for an explanation of how exploitation and exploration build on each other, in a ‘cycle of discovery’, developed in earlier research. The framework is tested empirically, in the sense of seeing whether it can help to reconstruct and understand the emergence of the pharmaceutical industry. One of the conclusions is that whereas recent literature stresses the idiosyncratic nature of the biotechnological revolution, our analysis seems to reveal that this does not seem to be as unique as suggested. From this, we conclude that the theoretical framework we propose, serves its purpose of explanation. But there are also some lessons for improving it.  相似文献   
70.
从系统论看我国法制建设的复杂性   总被引:10,自引:0,他引:10  
我国法制建设是一项社会系统工程。系统复杂性理论和系统科学的其他理论与方法,为我国法制系统工程的建设提供了理论工具。本文从系统论的角度,分析我国法制系统的结构、功能和复杂性,并提出建设我国法制系统工程需要解决的若干问题。  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