全文获取类型
收费全文 | 966篇 |
免费 | 110篇 |
国内免费 | 195篇 |
专业分类
1271篇 |
出版年
2024年 | 3篇 |
2023年 | 15篇 |
2022年 | 26篇 |
2021年 | 37篇 |
2020年 | 38篇 |
2019年 | 45篇 |
2018年 | 59篇 |
2017年 | 45篇 |
2016年 | 44篇 |
2015年 | 35篇 |
2014年 | 31篇 |
2013年 | 91篇 |
2012年 | 72篇 |
2011年 | 83篇 |
2010年 | 60篇 |
2009年 | 64篇 |
2008年 | 70篇 |
2007年 | 87篇 |
2006年 | 75篇 |
2005年 | 63篇 |
2004年 | 36篇 |
2003年 | 29篇 |
2002年 | 13篇 |
2001年 | 16篇 |
2000年 | 11篇 |
1999年 | 17篇 |
1998年 | 8篇 |
1997年 | 6篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 7篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1989年 | 8篇 |
1988年 | 2篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 5篇 |
1983年 | 1篇 |
1982年 | 6篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1975年 | 3篇 |
1972年 | 1篇 |
1964年 | 1篇 |
1959年 | 1篇 |
排序方式: 共有1271条查询结果,搜索用时 0 毫秒
251.
252.
Reaching nonvolunteer female smokers with effective smoking cessation programs is a critical public health challenge. Smokers (N = 2,786) among 15,004 female members of a health maintenance organization who completed a routine needs assessment were invited into the "UCLA Preventive Health Behavior Study," consisting of five telephone interviews over 2 years assessing health practices. Participants (N = 1,396) were randomized into experimental or control conditions of an unsolicited, mailed, self-help smoking cessation program. Subjects were not alerted to the link between the program and the health study. Smoking status was assessed at 1, 6, 12, and 18 months. Across all subjects, point prevalence at 18 months was 18.62, and continuous abstinence was 2.71%. No difference was found between treatment and control groups regarding smoking status or readiness to stop smoking--raising questions about the value of mailing cessation materials to nonvolunteers. Quit rates increased over the 18-month follow-up; those still smoking at 18 months reported increased readiness to quit. Predictors at each follow-up point were examined multivariately. 相似文献
253.
To address the fundamental question “What are primitives of visual perception?” we tested the hypothesis of early topological perception employing illusory conjunctions. Through a series of experiments, which were well controlled for various feature errors, we consistently observed the illusory conjunction of holes, which are a typical kind of topological property. Subjects in our experiments perceived illusory hollow figures in which the conjoined holes underwent geometric transformations. This indicates that the holes were perceived as abstract topological entities available at an early stage, which provides further support for the hypothesis of topological perception. 相似文献
254.
255.
256.
257.
盲人的跨感觉通道重组 总被引:5,自引:0,他引:5
失去视觉的盲人往往伴随着行为代偿,如听觉和触觉能力的提高。脑成像等认知神经科学研究发现,盲人行为代偿的神经机制之一是大脑皮层的跨感觉通道重组,即盲人的视皮层并没有因为视觉剥夺而失去作用,而是广泛地参与了其他感知觉任务。原本暂时的神经联结由于受到新的感觉信息传入方式的持续激活而固化,从而形成新的神经回路,可能是此类跨通道重组的神经基础。 相似文献
258.
《道德经》和谐思想的四个进阶 总被引:1,自引:0,他引:1
和谐,是中国文化中的重要理念。古代的思想家们对这一理念多有发明,形成了源远流长的和谐思想,深深渗透进了中国人的观念与生活中。《道德经》对和谐的阐发别开生面,处处流露着 相似文献
259.
Wayne Wu 《Philosophical Studies》2013,165(2):647-669
Is vision informationally encapsulated from cognition or is it cognitively penetrated? I shall argue that intentions penetrate vision in the experience of visual spatial constancy: the world appears to be spatially stable despite our frequent eye movements. I explicate the nature of this experience and critically examine and extend current neurobiological accounts of spatial constancy, emphasizing the central role of motor signals in computing such constancy. I then provide a stringent condition for failure of informational encapsulation that emphasizes a computational condition for cognitive penetration: cognition must serve as an informational resource for visual computation. This requires proposals regarding semantic information transfer, a crucial issue in any model of informational encapsulation. I then argue that intention provides an informational resource for computation of visual spatial constancy. Hence, intention penetrates vision. 相似文献
260.
小学生课堂问题行为与心理素质的关系:一项观察研究 总被引:1,自引:0,他引:1
为科学、客观的了解小学生课堂问题行为的现状并探讨与心理素质的关系,采用Martin等人提出的TPOT观察范式对重庆市潼南区某小学4-6年级117名学生的课堂问题行为进行录像、编码,并施测小学生心理素质问卷简化版。结果表明:(1)T-POT观察范式在本研究中具有适用性;(2)任务偏移是小学生最常见的课堂问题行为;(3)小学生课堂问题行为的表现存在显著的性别、年级差异;(4)在控制了年级、性别、班级环境变量后,心理素质能够显著负向预测课堂问题行为。 相似文献