全文获取类型
收费全文 | 729篇 |
免费 | 58篇 |
出版年
2024年 | 5篇 |
2023年 | 15篇 |
2022年 | 5篇 |
2021年 | 21篇 |
2020年 | 25篇 |
2019年 | 26篇 |
2018年 | 48篇 |
2017年 | 47篇 |
2016年 | 33篇 |
2015年 | 28篇 |
2014年 | 23篇 |
2013年 | 92篇 |
2012年 | 55篇 |
2011年 | 59篇 |
2010年 | 26篇 |
2009年 | 10篇 |
2008年 | 43篇 |
2007年 | 33篇 |
2006年 | 23篇 |
2005年 | 12篇 |
2004年 | 14篇 |
2003年 | 16篇 |
2002年 | 13篇 |
2001年 | 7篇 |
2000年 | 5篇 |
1999年 | 6篇 |
1998年 | 5篇 |
1997年 | 8篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 7篇 |
1992年 | 8篇 |
1991年 | 3篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 4篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1979年 | 2篇 |
1977年 | 3篇 |
1970年 | 1篇 |
1967年 | 1篇 |
1965年 | 2篇 |
1964年 | 1篇 |
1963年 | 1篇 |
1933年 | 1篇 |
排序方式: 共有787条查询结果,搜索用时 15 毫秒
141.
Bekinschtein P Katche C Slipczuk LN Igaz LM Cammarota M Izquierdo I Medina JH 《Neurobiology of learning and memory》2007,87(2):303-307
It is widely accepted that the formation of long-term memory (LTM) requires mRNA translation, but little is known about the cellular mechanisms in the brain that regulate this process. Mammalian target of rapamycin (mTOR) is a key regulator of translational efficacy and capacity. Here, we show that LTM formation of one-trial inhibitory avoidance (IA) in rats, a hippocampus-dependent fear-motivated learning task, requires mTOR activation. IA training is specifically associated with a rapid increase in the phosphorylation state of mTOR and its substrate ribosomal S6 kinase (p70S6K). Bilateral intra-CA1 infusion of rapamycin, a selective mTOR inhibitor, 15 min before, but not immediately after training completely hinders IA LTM without affecting short-term memory (STM) retention. Therefore, our findings indicate that the regulation of hippocampal mRNA translation is a major control step in memory consolidation. 相似文献
142.
143.
The purpose of this study was to identify patterns in Portuguese television advertisements and interpret changes in the portrayal of gender roles using data collected 7 years apart: 1996 and 2003. We grouped 11 attributes of the central figure displayed in 623 evening commercials using a k‐means cluster procedure. There were 4 distinct groups of advertisements that emerged, 2 of them characterizing a predominantly male central figure and the other 2 a female central figure. The overall increase in women portrayed in advertisements from 1996 (32.9%) to 2003 (40.8%) is reflected in a shift toward an increase of advertisements with a female central figure in the typically male “narrator” cluster. Practical implications of these findings are discussed. 相似文献
144.
Traditionally, liberals have confined religion to the sphere of the ‘private’ or ‘non-political’. However, recent debates
over the place of religious symbols in public spaces, state financing of faith schools, and tax relief for religious organisations
suggest that this distinction is not particularly useful in easing the tension between liberal commitments to equality on
the one hand, and freedom of religion on the other. This article deals with one aspect of this debate, which concerns whether
members of religious communities should receive exemptions from regulations that place a distinctively heavy burden on them.
Drawing on Habermas’ understanding of churches as ‘communities of interpretation’, we explore possible alternatives to both
the ‘rule-and-exemption’ approach and the ‘neutralist’ approach. Our proposal rests on the idea of mutual learning between
secular and religious perspectives. On this interpretation, what is required is (i) the generation and maintenance of public
spaces in which there could be discussion and dialogue about particular cases, and (ii) evaluation of whether the basic conditions
of moral discourse are present in these spaces. Thus deliberation becomes a touchstone for the building of a shared democratic
ethos. 相似文献
145.
Toon Leroy Mitchell Silva Rudi D’Hooge Jean-Marie Aerts Daniel Berckmans 《Behavior research methods》2009,41(1):148-153
In this article, an automated and accurate mouse observation method, based on a conventional test for motor function evaluation,
is outlined. The proposed measurement technique was integrated in a regular open-field test, where the trajectory and locomotion
of a free-moving mouse were measured simultaneously. The system setup consisted of a transparent cage and a camera placed
below it with its lens pointing upward, allowing for images to be captured from underneath the cage while the mouse was walking
on the transparent cage floor. Thus, additional information was obtained about the position of the limbs of the mice for gait
reconstruction. In a first step, the camera was calibrated as soon as it was fixed in place. A linear calibration factor,
relating distances in image coordinates to real-world dimensions, was determined. In a second step, the mouse was located
and its body contour segmented from the image by subtracting a previously taken “background” image of the empty cage from
the camera image. In a third step, the movement of the mouse was analyzed and its speed estimated from its location in the
past few images. If the speed was above a 1-sec threshold, the mouse was recognized to be running, and the image was further
processed for footprint recognition. In a fourth step, color filtering was applied within the recovered mouse region to measure
the position of the mouse’s paws, which were visible in the image as small pink spots. Paws that were detected at the same
location in a number of subsequent images were kept as footprints—that is, paws in contact with the cage floor. The footprints
were classified by their position relative to the mouse’s outline as corresponding to the front left or right paw or the hind
left or right paw. Finally, eight parameters were calculated from the footprint pattern to describe the locomotion of the
mouse: right/left overlap, front/hind base, right/left front limb stride, and right/left hind limb stride. As an application,
the system was tested using normal mice and mice displaying pentobarbital-induced ataxia. The footprint parameters measured
using the proposed system showed differences of 10% to 20% between normal and ataxic mice. 相似文献
146.
147.
Several studies have suggested that worry and obsessional symptoms are systematically associated. In the present study, the relationship between worry and obsessional symptoms was confirmed. Measures included a worry content measure, a worry visual analogue scale, a modification of the everyday checking behaviours scale, and the MOCI. Worry was found to be more consistently associated with checking and doubting, than washing and slowness. It is suggested that worry and obsessional symptoms both occur in response to stress. In addition, it is suggested that worry and checking are functionally similar, and Generalised Anxiety Disorder may represent a 'cognitive' variant of obsessional checking. 相似文献
148.
Visual space perception and visually directed action. 总被引:10,自引:0,他引:10
J M Loomis J A Da Silva N Fujita S S Fukusima 《Journal of experimental psychology. Human perception and performance》1992,18(4):906-921
The results of two types of experiments are reported. In 1 type, Ss matched depth intervals on the ground plane that appeared equal to frontal intervals at the same distance. The depth intervals had to be made considerably larger than the frontal intervals to appear equal in length, with this physical inequality of equal-appearing intervals increasing with egocentric distance of the intervals (4 m-12 m). In the other type of experiment, Ss viewed targets lying on the ground plane and then, with eyes closed, attempted either to walk directly to their locations or to point continuously toward them while walking along paths that passed off to the side. Performance was quite accurate in both motoric tasks, indicating that the distortion in the mapping from physical to visual space evident in the visual matching task does not manifest itself in the visually open-loop motoric tasks. 相似文献
149.
Parental attitude questionnaires such as the Parental Attitude Research Instrument (PARI) are still in use despite their inherent difficulties. In light of the need to test theoretical models by measuring a range of parental characteristics, the properties of the PARI were re-examined and, on the basis of a factor analysis of the 23 subtests of the PARI, a shortened version was constructed. A measure of maternal Authoritarian Control, which was found to be associated with measures of maternal mental ability, personality, level of education, reading age, number of adverse family conditions and child-rearing practices, has proved useful for other projects related to this ongoing study. It is recommended that such instruments be used only in conjunction with other measures which examine the family environment, for example in an index of child-rearing practices. 相似文献
150.
This document is a consensus statement on Psychiatry of the Elderly jointly produced by WHO and the Geriatric Psychiatry Section of the World Psychiatric Association, with the collaboration of several pertinent NGOs and the participation of experts from countries in several WHO regions. 相似文献