全文获取类型
收费全文 | 2772篇 |
免费 | 19篇 |
国内免费 | 24篇 |
专业分类
教育 | 956篇 |
科学研究 | 1471篇 |
体育 | 89篇 |
综合类 | 67篇 |
文化理论 | 5篇 |
信息传播 | 227篇 |
出版年
2024年 | 1篇 |
2023年 | 36篇 |
2022年 | 103篇 |
2021年 | 113篇 |
2020年 | 135篇 |
2019年 | 154篇 |
2018年 | 142篇 |
2017年 | 99篇 |
2016年 | 34篇 |
2015年 | 106篇 |
2014年 | 162篇 |
2013年 | 156篇 |
2012年 | 200篇 |
2011年 | 165篇 |
2010年 | 121篇 |
2009年 | 134篇 |
2008年 | 162篇 |
2007年 | 179篇 |
2006年 | 140篇 |
2005年 | 90篇 |
2004年 | 99篇 |
2003年 | 92篇 |
2002年 | 63篇 |
2001年 | 52篇 |
2000年 | 21篇 |
1999年 | 15篇 |
1998年 | 17篇 |
1997年 | 9篇 |
1996年 | 14篇 |
1988年 | 1篇 |
排序方式: 共有2815条查询结果,搜索用时 15 毫秒
41.
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
42.
中小企业集群是一个有较强生命力和创新力的经济组织形式。其创新效应并不亚于大企业。在主要分析了其环境、技术和系统等方面的创新效应之后,着重分析了中小企业集群的技术创新效应,对技术创新效应作了进一步理论探讨。 相似文献
43.
44.
通过系统构建中国区域绿色发展转型指标体系将人力资本异质门槛纳入创新驱动绿色发展转型框架,考察不同区域人力资本门槛下创新活力对绿色发展转型的非线性影响机制.研究发现,当前区域绿色发展转型并没有实现,存在较大的发展空间,且区域异质性显著,创新活力对于区域绿色发展转型的作用存在显著的人力资本异质门槛效应,较低水平的人力资本并不利于促使区域创新活力驱动绿色发展转型,而随着地区人力资本积累的提高并突破"临界点",在一定程度上有效增强区域创新活力的驱动效应,进而推动区域绿色发展转型. 相似文献
45.
Shin-Horng Chen 《Research Policy》2004,33(2):337-349
Although it is evident that technology is becoming increasingly globalized, resulting in the expansion of R&D internationalization by firms, despite this discernible trend, the substantial body of literature in this area is based mainly on the experience of the developed country. This paper aims to contribute to the understanding of this issue by examining the R&D internationalization of a newly-industrializing country, Taiwan being a prime example, and its connection with the global production network. We begin with an examination of the literature on R&D internationalization and globalization, based upon which we propose a conceptual framework adapted from Dunning’s eclectic paradigm. In doing so, we set out to develop arguments based not only on the reasons why cross-strait R&D internationalization may be undertaken by Taiwanese information technology (IT) firms, but also the likely patterns of their R&D portfolios across the strait. Drawing on an original questionnaire survey and firm-level interviews, the paper presents and discusses empirical data on the cross-strait R&D deployment of Taiwanese IT firms. It then goes a stage further, using the ‘smiling curve’, to put forward a ‘holistic’ view of the cross-border innovation network in the IT hardware industry, in order to determine what cross-strait R&D internationalization means to the global production network. 相似文献
46.
略论创新文化建设 总被引:1,自引:0,他引:1
王汉林 《科学.经济.社会》2006,24(3):86-88
创新文化主要指的是在技术领域能够激发人们进行自主创新的文化,通过创新文化来创新技术,其实质是科学精神与人文精神的融合。本文论述了建设创新文化的主要内容与途径。 相似文献
47.
邹广胜 《温州大学学报(社会科学版)》2011,24(1)
印象派画家以反叛僵死的传统来开始自己的艺术追求,不过,这只是与强大的传统之间发生了偏差,即他们在理解传统遗产时提出了自己的看法.印象派画家自身对于传统的丰厚积累成为让他们自己在将来转化为传统的一部分的前提和基础.印象派画家对自然的热爱除了来自浪漫主义的影响外,还来自现实主义的影响. 相似文献
48.
中学语文教学对学生创新能力的培养 总被引:2,自引:0,他引:2
郑世杰 《四川职业技术学院学报》2005,15(3):57-58
本文探讨了应试教育的语文教学模式不利于培养学生创新能力的种种因素,介绍了新课程教学实践中总结出的培养学生创新能力的几种方式和相应的策略,以期达到培养中学生创新能力的目的。 相似文献
49.
50.