全文获取类型
收费全文 | 1434篇 |
免费 | 37篇 |
国内免费 | 1篇 |
专业分类
教育 | 1156篇 |
科学研究 | 50篇 |
各国文化 | 22篇 |
体育 | 78篇 |
综合类 | 1篇 |
文化理论 | 16篇 |
信息传播 | 149篇 |
出版年
2023年 | 5篇 |
2022年 | 21篇 |
2021年 | 19篇 |
2020年 | 34篇 |
2019年 | 42篇 |
2018年 | 86篇 |
2017年 | 92篇 |
2016年 | 55篇 |
2015年 | 52篇 |
2014年 | 45篇 |
2013年 | 311篇 |
2012年 | 45篇 |
2011年 | 59篇 |
2010年 | 40篇 |
2009年 | 42篇 |
2008年 | 41篇 |
2007年 | 22篇 |
2006年 | 43篇 |
2005年 | 28篇 |
2004年 | 29篇 |
2003年 | 21篇 |
2002年 | 23篇 |
2001年 | 14篇 |
2000年 | 20篇 |
1999年 | 27篇 |
1998年 | 38篇 |
1997年 | 9篇 |
1996年 | 16篇 |
1995年 | 25篇 |
1994年 | 13篇 |
1993年 | 11篇 |
1992年 | 18篇 |
1991年 | 15篇 |
1990年 | 14篇 |
1989年 | 12篇 |
1988年 | 9篇 |
1987年 | 9篇 |
1986年 | 9篇 |
1985年 | 5篇 |
1984年 | 6篇 |
1983年 | 4篇 |
1982年 | 4篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 6篇 |
1976年 | 6篇 |
1973年 | 3篇 |
1970年 | 2篇 |
1867年 | 2篇 |
1833年 | 2篇 |
排序方式: 共有1472条查询结果,搜索用时 15 毫秒
61.
Geiger Vince Delzoppo Catherine Straesser Rudolf 《Educational Studies in Mathematics》2022,111(3):543-565
Educational Studies in Mathematics - In this article, we document the support provided by highly recognised journals in Mathematics Education in response to the challenges faced by English... 相似文献
62.
Cimon-Paquet Catherine Gaudet Olivier Verner-Filion Jérémie Véronneau Marie-Hélène 《European Journal of Psychology of Education - EJPE》2023,38(2):819-839
European Journal of Psychology of Education - School motivation is key to promoting optimal educational pathways. Some studies suggest that parental monitoring behaviors foster school motivation... 相似文献
63.
Berenice Anaya Jenae M. Neiderhiser Koraly Pérez-Edgar Leslie D. Leve Jody M. Ganiban David Reiss Misaki N. Natsuaki Daniel S. Shaw 《Child development》2023,94(4):e231-e245
The present study leveraged data from a longitudinal adoption study of 361 families recruited between 2003 and 2010 in the United States. We investigated how psychopathology symptoms in birth parents (BP; Mage = 24.1 years; 50.5–62.9% completed high school) and adoptive parents (AP; Mage = 37.8 years; 80.9% completed college; 94% mother–father couples) influenced children's behavioral inhibition (BI) trajectories. We used latent growth models of observed BI at 18 and 27 months, and 4.5 and 7 years in a sample of adopted children (Female = 42%, White = 57%, Black = 11%, Multi-racial = 21%, Latinx = 9%). BI generally decreased over time, yet there was substantial variability in these trajectories. Neither BP nor AP psychopathology symptoms independently predicted systematic differences in BI trajectories. Instead, we found that AP internalizing symptoms moderated the effects of BP psychopathology on trajectories of BI, indicating a gene by environment interaction. 相似文献
64.
Fu-Ming Chen Jason Sheng-Hong Tsai Ying-Ting Liao Shu-Mei Guo Ming-Chung Ho Fu-Zen Shaw Leang-San Shieh 《Journal of The Franklin Institute》2014
An improvement on the transient response of tracking for the sampled-data system based on an improved PD-type iterative learning control (ILC) is proposed in this paper. The developed analog ILC method and the high-gain property tracker design methodology are first combined to significantly reduce learning epochs and overcome the initial condition shift problem and discontinuous reference input in the traditional ILC. Besides, the proposed ILC improves the transient response and decreases the rate of weighting matrices Q to R under the traditional linear quadratic tracker design. First, the off-line observer/Kalman filter identification (OKID) is used to determine the appropriate (low-) order system parameters and state estimator for the physical system with unknown system equation, so that the model-based PD-type ILC can be implemented for practical applications. Then, to improve the transient response and decrease the control effort, the proportional difference type (PD-type) ILC algorithm is combined with the high-gain property linear quadratic tracker (LQT) design to construct the high performance tracker for the model-based sampled-data systems. Furthermore, the discrete-time version high performance tracker design for the unknown stochastic sampled-data system via the iterative learning control method is proposed in this paper based on the Euler method and the digital redesign approach. Finally, some examples are given for illustrating the effectiveness of the proposed method. 相似文献
65.
66.
67.
68.
69.
70.