全文获取类型
收费全文 | 16157篇 |
免费 | 59篇 |
国内免费 | 10篇 |
专业分类
教育 | 12261篇 |
科学研究 | 1600篇 |
各国文化 | 102篇 |
体育 | 722篇 |
综合类 | 1篇 |
文化理论 | 428篇 |
信息传播 | 1112篇 |
出版年
2021年 | 39篇 |
2020年 | 60篇 |
2019年 | 113篇 |
2018年 | 2282篇 |
2017年 | 2195篇 |
2016年 | 1714篇 |
2015年 | 204篇 |
2014年 | 224篇 |
2013年 | 1306篇 |
2012年 | 303篇 |
2011年 | 792篇 |
2010年 | 917篇 |
2009年 | 521篇 |
2008年 | 751篇 |
2007年 | 1226篇 |
2006年 | 149篇 |
2005年 | 486篇 |
2004年 | 534篇 |
2003年 | 436篇 |
2002年 | 226篇 |
2001年 | 76篇 |
2000年 | 92篇 |
1999年 | 77篇 |
1998年 | 45篇 |
1997年 | 70篇 |
1996年 | 45篇 |
1995年 | 52篇 |
1994年 | 44篇 |
1993年 | 40篇 |
1992年 | 53篇 |
1991年 | 73篇 |
1990年 | 56篇 |
1989年 | 50篇 |
1988年 | 34篇 |
1987年 | 53篇 |
1986年 | 36篇 |
1985年 | 54篇 |
1984年 | 50篇 |
1983年 | 47篇 |
1982年 | 37篇 |
1981年 | 37篇 |
1980年 | 26篇 |
1979年 | 40篇 |
1978年 | 47篇 |
1977年 | 40篇 |
1976年 | 30篇 |
1975年 | 34篇 |
1974年 | 23篇 |
1973年 | 21篇 |
1971年 | 25篇 |
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
1.
David Kaldewey 《Minerva》2018,56(2):161-182
This article analyzes the concept of “grand challenges” as part of a shift in how scientists and policymakers frame and communicate their respective agendas. The history of the grand challenges discourse helps to understand how identity work in science and science policy has been transformed in recent decades. Furthermore, the question is raised whether this discourse is only an indicator, or also a factor in this transformation. Building on conceptual history and historical semantics, the two parts of the article reconstruct two discursive shifts. First, the observation that in scientific communication references to “problems” are increasingly substituted by references to “challenges” indicates a broader cultural trend of how attitudes towards what is problematic have shifted in the last decades. Second, as the grand challenges discourse is rooted in the sphere of sports and competition, it introduces a specific new set of societal values and practices into the spheres of science and technology. The article concludes that this process can be characterized as the sportification of science, which contributes to self-mobilization and, ultimately, to self-optimization of the participating scientists, engineers, and policymakers. 相似文献
2.
3.
4.
5.
6.
7.
Anthony J. Sadar 《Science & Education》2018,27(1-2):233-235
8.
9.
10.
James D. T. Tannock 《Higher Education Quarterly》1992,46(1):108-123
This article describes the Engineering Professors' Conference (EPC) approach to quality assurance for Higher Education Institutions, which is currently the only formalized alternative to British Standard 5750 'Quality Systems'. The EPC approach is based on principles of quality assurance and Total Quality Management which have been developed in industry. These ideas are briefly outlined, and an opinion expressed on the interpretation and application of BSS7S0 for HE. The EPC model is explained, illustrated with example elements taken from the EPC Specification and Guidelines for Quality Assurance in Higher Education. A top-down approach to the development of an institutional quality system is described, based on a quality policy statement. Areas of activity which have an important impact on the quality of education are identified, emphasising the quality assurance requirements of academic departments. Supporting and administrative quality system requirements are also described, as these also play an important role in the quality of education. Formal quality procedures and documentation in key areas are proposed. 相似文献