全文获取类型
收费全文 | 3141篇 |
免费 | 53篇 |
国内免费 | 110篇 |
专业分类
教育 | 1744篇 |
科学研究 | 831篇 |
各国文化 | 3篇 |
体育 | 110篇 |
综合类 | 115篇 |
文化理论 | 3篇 |
信息传播 | 498篇 |
出版年
2024年 | 2篇 |
2023年 | 37篇 |
2022年 | 49篇 |
2021年 | 51篇 |
2020年 | 94篇 |
2019年 | 84篇 |
2018年 | 83篇 |
2017年 | 89篇 |
2016年 | 62篇 |
2015年 | 77篇 |
2014年 | 196篇 |
2013年 | 413篇 |
2012年 | 215篇 |
2011年 | 191篇 |
2010年 | 152篇 |
2009年 | 159篇 |
2008年 | 159篇 |
2007年 | 213篇 |
2006年 | 173篇 |
2005年 | 172篇 |
2004年 | 141篇 |
2003年 | 105篇 |
2002年 | 94篇 |
2001年 | 81篇 |
2000年 | 50篇 |
1999年 | 31篇 |
1998年 | 25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 | 4篇 |
1988年 | 3篇 |
1985年 | 1篇 |
排序方式: 共有3304条查询结果,搜索用时 515 毫秒
61.
论信息代理与智能代理 总被引:7,自引:0,他引:7
文章主要介绍了信息代理与智能代理同样是信息中介或代理的特点,分析了他们之间相同与不同,构想了两者发展的前景。 相似文献
62.
Since accurate decisions are required for effective management, much research has focused on information systems that support decision making. Recently, this research has engendered frameworks, such as the management support system (MSS), that are designed to provide comprehensive and integrated support for the decision making process. Few, if any, studies have empirically measured the effects of these frameworks on decision making. This article offers empirical evidence on MSS effectiveness. It overviews the decision making process, presents an MSS for supporting the process, and assesses the influences of the MSS on the process and outcomes of health care decision making. The paper also examines the implications of the analyses for information systems research and health care practice. 相似文献
63.
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
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
64.
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
65.
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
66.
《情报学报》九五期间论文作者及引文的调查分析 总被引:10,自引:1,他引:10
本文调查了《情报学报》九五期间(1996-2000年)发表论文作者情况(作者发文选题分布、年龄结构分布、职称结构分布、性别结构分布、系统分布、地区分布和合作度)及发表论文引文情况(引文的数量、类型、学科、语种、年代、被引期刊和自引量),并对有关数据进行了定量分析。 相似文献
67.
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
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
68.
On the relationship between environmental management, environmental innovation and patenting: Evidence from German manufacturing firms 总被引:1,自引:0,他引:1
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
69.
The dynamics of technological change in UK retail banking services: An evolutionary perspective 总被引:1,自引:0,他引:1
Davide Consoli 《Research Policy》2005,34(4):461-480
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
70.
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