全文获取类型
| 收费全文 | 6249篇 |
| 免费 | 95篇 |
| 国内免费 | 6篇 |
专业分类
| 教育 | 4584篇 |
| 科学研究 | 391篇 |
| 各国文化 | 100篇 |
| 体育 | 511篇 |
| 综合类 | 4篇 |
| 文化理论 | 108篇 |
| 信息传播 | 652篇 |
出版年
| 2023年 | 16篇 |
| 2022年 | 25篇 |
| 2021年 | 73篇 |
| 2020年 | 160篇 |
| 2019年 | 204篇 |
| 2018年 | 226篇 |
| 2017年 | 263篇 |
| 2016年 | 249篇 |
| 2015年 | 155篇 |
| 2014年 | 192篇 |
| 2013年 | 1351篇 |
| 2012年 | 184篇 |
| 2011年 | 202篇 |
| 2010年 | 161篇 |
| 2009年 | 155篇 |
| 2008年 | 187篇 |
| 2007年 | 182篇 |
| 2006年 | 156篇 |
| 2005年 | 166篇 |
| 2004年 | 140篇 |
| 2003年 | 144篇 |
| 2002年 | 130篇 |
| 2001年 | 107篇 |
| 2000年 | 110篇 |
| 1999年 | 70篇 |
| 1998年 | 69篇 |
| 1997年 | 85篇 |
| 1996年 | 83篇 |
| 1995年 | 61篇 |
| 1994年 | 73篇 |
| 1993年 | 61篇 |
| 1992年 | 74篇 |
| 1991年 | 60篇 |
| 1990年 | 62篇 |
| 1989年 | 45篇 |
| 1988年 | 48篇 |
| 1987年 | 38篇 |
| 1986年 | 53篇 |
| 1985年 | 55篇 |
| 1984年 | 56篇 |
| 1983年 | 52篇 |
| 1982年 | 43篇 |
| 1981年 | 34篇 |
| 1980年 | 36篇 |
| 1979年 | 38篇 |
| 1978年 | 39篇 |
| 1977年 | 26篇 |
| 1976年 | 24篇 |
| 1975年 | 16篇 |
| 1948年 | 18篇 |
排序方式： 共有6350条查询结果，搜索用时 316 毫秒
51.
Bahar Köymen Cathal O’Madagain Andreas Domberg Michael Tomasello 《Child development》2020,91(3):685-693
In collaborative problem solving, children produce and evaluate arguments for proposals. We investigated whether 3- and 5-year-olds (N = 192) can produce and evaluate arguments against those arguments (i.e., counter-arguments). In Study 1, each child within a peer dyad was privately given a reason to prefer one over another solution to a task. One child, however, was given further information that would refute the reasoning of their partner. Five-year-olds, but not 3-year-olds, identified and produced valid and relevant counter-arguments. In Study 2, 3-year-olds were given discourse training (discourse that contrasted valid and invalid counter-arguments) and then given the same problem-solving tasks. After training, 3-year-olds could also identify and produce valid and relevant counter-arguments. Thus, participating in discourse about reasons facilitates children’s counter-argumentation. 相似文献
52.
53.
54.
55.
56.
57.
Andrew Post J. Michio Clark D. G. E. Robertson T. Blaine Hoshizaki Michael D. Gilchrist 《Sports Engineering》2017,20(2):111-119
Brain injury research in sport employs a variety of physical models equipped with accelerometers. These acceleration signals are commonly processed using filters. The purpose of this research was to determine the effect of applying filters with different cutoff frequencies to the acceleration signals used as input for finite element modeling of the brain. Signals were generated from reconstructions of concussion events from American football and ice hockey in the laboratory using a Hybrid III headform. The resulting acceleration signals were used as input for the University College Dublin Brain Trauma Model after being processed with filters. The results indicated that using a filter with a cutoff of 300 Hz or higher had little effect on the resulting strain measures. In some cases there was some effect of the filters on the peak linear (8–30g) and rotational measures (1000–4000 rad/s2), but little effect on the finite element strain result (approximately 2–6 %). The short duration and high magnitude accelerations, such as the puck impact, were most affected by the cutoff frequency of different filters. 相似文献
58.
60.
Michael A. Peters 《Educational Philosophy and Theory》2020,52(8):805-810