全文获取类型
| 收费全文 | 13899篇 |
| 免费 | 187篇 |
| 国内免费 | 7篇 |
专业分类
| 教育 | 10178篇 |
| 科学研究 | 1209篇 |
| 各国文化 | 80篇 |
| 体育 | 1117篇 |
| 综合类 | 7篇 |
| 文化理论 | 87篇 |
| 信息传播 | 1415篇 |
出版年
| 2021年 | 102篇 |
| 2020年 | 176篇 |
| 2019年 | 283篇 |
| 2018年 | 362篇 |
| 2017年 | 370篇 |
| 2016年 | 346篇 |
| 2015年 | 207篇 |
| 2014年 | 290篇 |
| 2013年 | 2635篇 |
| 2012年 | 302篇 |
| 2011年 | 367篇 |
| 2010年 | 228篇 |
| 2009年 | 221篇 |
| 2008年 | 325篇 |
| 2007年 | 242篇 |
| 2006年 | 309篇 |
| 2005年 | 209篇 |
| 2004年 | 193篇 |
| 2003年 | 183篇 |
| 2002年 | 223篇 |
| 2001年 | 325篇 |
| 2000年 | 300篇 |
| 1999年 | 261篇 |
| 1998年 | 129篇 |
| 1997年 | 151篇 |
| 1996年 | 166篇 |
| 1995年 | 169篇 |
| 1994年 | 134篇 |
| 1993年 | 151篇 |
| 1992年 | 223篇 |
| 1991年 | 201篇 |
| 1990年 | 201篇 |
| 1989年 | 236篇 |
| 1988年 | 225篇 |
| 1987年 | 196篇 |
| 1986年 | 191篇 |
| 1985年 | 205篇 |
| 1984年 | 181篇 |
| 1983年 | 211篇 |
| 1982年 | 145篇 |
| 1981年 | 145篇 |
| 1980年 | 134篇 |
| 1979年 | 213篇 |
| 1978年 | 162篇 |
| 1977年 | 154篇 |
| 1976年 | 131篇 |
| 1975年 | 120篇 |
| 1974年 | 111篇 |
| 1973年 | 121篇 |
| 1971年 | 95篇 |
排序方式： 共有10000条查询结果，搜索用时 328 毫秒
1.
Purpose: Overuse injuries are common in sport, but complete understanding of injury risk factors remains incomplete. Although biomechanical studies frequently examine musculoskeletal injury mechanisms, human movement variability studies aim to better understand neuromotor functioning, with proposed connections between overuse injury mechanisms and changes in motor variability. Method: In a narrative review, we discuss the variability-overuse injury hypothesis, which suggests repeated load application leads to mechanical tissue breakdown and subsequent injury when exceeding the rate of physiological adaptation. Due to the multidisciplinary nature of this hypothesis, we incorporate concepts from motor control, neurophysiology, biomechanics, as well as research design and data analysis. We therefore summarize multiple perspectives while proposing theoretical relationships between movement variability and lower extremity overuse injuries. Results: Experimental data are presented and summarized from published experiments examining interactions between experimental task demands and movement variability in the context of drop landing movements, along with comparisons to previous movement variability studies. Conclusion: We provide a conceptual framework for sports medicine researchers interested in predicting and preventing sports injuries. Under performance conditions with greater task demands, we predict reduced trial-to-trial movement variability that could increase the likelihood of overuse injuries. 相似文献
2.
Research in Higher Education - State financial aid grant programs are commonly categorized as either need-based, merit-based, or both, but their initial eligibility requirements include many more... 相似文献
3.
4.
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
5.
6.
7.
8.
9.
Jean Peters 《Publishing Research Quarterly》1992,8(3):12-23
The R. R. Bowker Company has been compiling and publishing statistics on the book industry for more than a century. The history
of this effort is reported, with details on how the collection, classification, and publication of data have evolved. Bowker
provides statistics on book title output, booksellers (retail and wholesale), and libraries.
Jean Peters is the librarian at the Frederic G. Melcher Library, Cahners Publishing Company, formerly the library of the R.
R. Bowker Company. 相似文献
10.