全文获取类型
收费全文 | 871篇 |
免费 | 96篇 |
国内免费 | 270篇 |
专业分类
1237篇 |
出版年
2023年 | 19篇 |
2022年 | 30篇 |
2021年 | 23篇 |
2020年 | 46篇 |
2019年 | 37篇 |
2018年 | 37篇 |
2017年 | 38篇 |
2016年 | 35篇 |
2015年 | 30篇 |
2014年 | 34篇 |
2013年 | 70篇 |
2012年 | 49篇 |
2011年 | 77篇 |
2010年 | 53篇 |
2009年 | 65篇 |
2008年 | 66篇 |
2007年 | 112篇 |
2006年 | 83篇 |
2005年 | 70篇 |
2004年 | 30篇 |
2003年 | 19篇 |
2002年 | 15篇 |
2001年 | 16篇 |
2000年 | 21篇 |
1999年 | 21篇 |
1998年 | 12篇 |
1997年 | 12篇 |
1996年 | 3篇 |
1995年 | 8篇 |
1994年 | 13篇 |
1993年 | 11篇 |
1992年 | 10篇 |
1991年 | 10篇 |
1990年 | 6篇 |
1989年 | 10篇 |
1988年 | 8篇 |
1987年 | 4篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 5篇 |
1960年 | 1篇 |
排序方式: 共有1237条查询结果,搜索用时 0 毫秒
231.
Environmental enrichment improves behavioral performance and auditory spatial representation of primary auditory cortical neurons in rat 总被引:1,自引:0,他引:1
Rui Cai Fei Guo Jiping Zhang Jinghong Xu Yilei Cui Xinde Sun 《Neurobiology of learning and memory》2009,91(4):366-376
Environmental enrichment (EE) has an important role in brain plasticity. Early research has shown that EE increases the response strength of neurons in the auditory cortex, but it remains unknown whether EE can influence the process of spatial localization in the auditory system. In this study, we raised rats in enriched and standard conditions from postnatal day 10 to day 56. By testing behavioral tasks via auditory cues, we have shown that EE improved the number of correct scores, but decreased the reaction time and azimuth deviation in behavioral performance of sound-azimuth discrimination. By in vivo extracellular recording, we have shown that EE enhanced the directional sensitivity of neurons in the primary auditory cortex. For example, EE rats had a smaller spatial receptive field, sharper frequency tuning curve and directional selective curve of auditory neurons compared with normal rats. Our findings indicate that early exposure to EE increases directional sensitivity. These results provide an insight into developmental plasticity in the auditory system. 相似文献
232.
233.
234.
235.
236.
Modeling the effects of verbal and nonverbal pair strength on associative recognition 总被引:1,自引:0,他引:1
Operations that improve the accuracy of associative recognition can do so in qualitatively different ways. Increasing repetitions and study time increases hit rates but has small effects on false alarm rates, and the specific patterns of false alarms are dependent on the stimuli (e.g., pairs of words, pseudowords, faces, or Chinese characters). In contrast, manipulating the type of stimuli that make up pairs produces a robust mirror effect: The hit rate is greater, and the false alarm rate is lower, for better recognized stimuli. To explain these findings, a model of single-item recognition is extended to associative recognition. Within this dual-process framework, the present results suggest that words are encoded more extensively than nonverbal stimuli and that recognition of frequently encountered stimuli (words and faces) is more likely to be based on recollection than is recognition of uncommon stimuli (pseudowords and Chinese characters). 相似文献
237.
238.
239.
240.