全文获取类型
收费全文 | 528篇 |
免费 | 32篇 |
国内免费 | 1篇 |
专业分类
561篇 |
出版年
2022年 | 6篇 |
2021年 | 8篇 |
2020年 | 6篇 |
2019年 | 16篇 |
2018年 | 11篇 |
2017年 | 21篇 |
2016年 | 19篇 |
2015年 | 13篇 |
2014年 | 13篇 |
2013年 | 49篇 |
2012年 | 32篇 |
2011年 | 26篇 |
2010年 | 19篇 |
2009年 | 11篇 |
2008年 | 17篇 |
2007年 | 20篇 |
2006年 | 26篇 |
2005年 | 14篇 |
2004年 | 8篇 |
2003年 | 12篇 |
2002年 | 10篇 |
2001年 | 14篇 |
2000年 | 6篇 |
1999年 | 12篇 |
1998年 | 12篇 |
1997年 | 8篇 |
1996年 | 3篇 |
1995年 | 6篇 |
1994年 | 8篇 |
1993年 | 11篇 |
1992年 | 11篇 |
1991年 | 11篇 |
1990年 | 7篇 |
1989年 | 8篇 |
1988年 | 3篇 |
1987年 | 7篇 |
1986年 | 7篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 4篇 |
1981年 | 6篇 |
1979年 | 3篇 |
1978年 | 10篇 |
1974年 | 4篇 |
1973年 | 4篇 |
1969年 | 3篇 |
1968年 | 3篇 |
1966年 | 2篇 |
1965年 | 2篇 |
1964年 | 2篇 |
排序方式: 共有561条查询结果,搜索用时 8 毫秒
521.
522.
523.
524.
525.
Nick Hughes 《Philosophical Studies》2014,169(2):333-338
Williamson (2000) appeals to considerations about when it is natural to say that a hypothesis is consistent with one’s evidence in order to motivate the claim that all and only knowledge is evidence. It is argued here that the relevant considerations do not support this claim, and in fact conflict with it. 相似文献
526.
527.
528.
J R Hughes S B Gulliver J W Fenwick W A Valliere K Cruser S Pepper P Shea L J Solomon B S Flynn 《Health psychology》1992,11(5):331-334
We examined cessation among 630 smokers who quit abruptly on their own. Continuous, complete abstinence rates were 33% at 2 days, 24% at 7 days, 22% at 14 days, 19% at 1 month, 11% at 3 months, 8% at 6 months postcessation, and 3% at 6 months with biochemical verification. Slipping (smoking an average of less than 1 cigarette/day) was common (9% to 15% of subjects) and was a strong predictor of relapse; however, 23% of long-term abstainers slipped at some point. These results challenge beliefs that most smokers can initially stop smoking and that most relapse occurs later on postcessation. 相似文献
529.
Since visible persistence of grating patterns increases with spatial frequency, it is often inferred that the perceived duration of a grating is also longer at higher spatial frequencies. However, other work has demonstrated that the perceived onset of a grating is also delayed at higher spatial frequencies. Thus it is impossible to infer the subjective duration from the results of visible persistence studies alone. In order to estimate perceived duration in the present study, reaction times (RTs) to grating onsets and offsets were measured for a range of spatial frequencies. The results indicate that although the perceived duration (ie the difference between offset and onset RTs) was consistently longer than the physical duration, the estimates of perceived duration did not vary with changes in spatial frequency. Differences between the present results and earlier findings are interpreted in the context of the different methods used to measure perceived offset. 相似文献
530.