全文获取类型
收费全文 | 4512篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
4515篇 |
出版年
2018年 | 112篇 |
2017年 | 93篇 |
2016年 | 184篇 |
2015年 | 93篇 |
2014年 | 31篇 |
2013年 | 54篇 |
2012年 | 261篇 |
2011年 | 252篇 |
2010年 | 15篇 |
2009年 | 24篇 |
2008年 | 33篇 |
2007年 | 29篇 |
2006年 | 42篇 |
2005年 | 1319篇 |
2004年 | 660篇 |
2003年 | 444篇 |
2002年 | 135篇 |
2001年 | 26篇 |
2000年 | 10篇 |
1999年 | 23篇 |
1998年 | 4篇 |
1995年 | 3篇 |
1994年 | 11篇 |
1992年 | 25篇 |
1991年 | 41篇 |
1990年 | 58篇 |
1989年 | 44篇 |
1988年 | 26篇 |
1987年 | 41篇 |
1986年 | 37篇 |
1985年 | 29篇 |
1984年 | 25篇 |
1983年 | 19篇 |
1982年 | 3篇 |
1979年 | 32篇 |
1978年 | 10篇 |
1977年 | 7篇 |
1976年 | 10篇 |
1975年 | 28篇 |
1974年 | 32篇 |
1973年 | 30篇 |
1972年 | 25篇 |
1971年 | 25篇 |
1970年 | 17篇 |
1969年 | 19篇 |
1968年 | 16篇 |
1967年 | 17篇 |
1966年 | 16篇 |
1965年 | 7篇 |
1932年 | 3篇 |
排序方式: 共有4515条查询结果,搜索用时 0 毫秒
31.
G Sack H J Leubuscher B P?gelt N Roth 《Psychiatrie, Neurologie, und medizinische Psychologie》1986,38(5):246-254
The influence in 8 of our patients with ophthalmic migraine of photic driving with sine-like flashing lights on EEG background activity was checked and the visually evoked potentials following the application of diffused simple light stimuli were analyzed using the recovery cycle technique. The results indicate a slightly increased tonic activity of the structures of the mesencephalic formatio reticularis, such as may be produced by slight functional disturbances. Some vegetative secondary symptoms of migraine attacks and some of the changes in EEG observed in patients with ophthalmic migraine are explicable by such an abnormality. 相似文献
32.
R F?tzsch R Podemski A Brzecki R Bogdańska 《Psychiatrie, Neurologie, und medizinische Psychologie》1986,38(9):518-525
Twenty six clinically healthy smokers were studied with transient pattern visual-evoked potentials. In comparison with a sample of "normal" subjects we found a difference of some parameters (P less than 0.05): the P2-latency and the interocular difference of latency on average were 6-7 ms respectively 2 ms larger. Thirteen subjects have had a prolonged P2-latency (P less than 0.05) and/or a difference in interocular latencies larger than 5 ms. These findings may suggest on subclinical disturbances of visual system and indicators of an special sensitivity of that person. The findings are possibly related to tobacco-alcohol amblyopia. 相似文献
33.
Cue depreciation: when word fragment completion is undermined by prior exposure to lesser fragments 总被引:3,自引:0,他引:3
Z F Peynircio?lu M J Watkins 《Journal of experimental psychology. Learning, memory, and cognition》1986,12(3):426-431
The ability to think of a previously studied item has often been shown to be impaired when, in one way or another, the extraitem context is changed from study to test. In a series of five experiments, such impairment is induced in a somewhat different way. A fragment (e.g. r-i--rop) of a just-studied word (raindrop) is shown to be less readily completed if it is presented bit by bit (r------p, r----r-p, r-i--r-p, r-i--rop) rather than all at once (Experiments 1, 3, 4, and 5). No such effect is found if the word has not been studied beforehand (Experiments 2, 3, 4, and 5). This pattern of results occurs even when fragments of studied and nonstudied words occur in the same test and under conditions in which subjects cannot tell whether a given fragment is of a studied or nonstudied word (Experiments 4 and 5). In addition, for words that have been studied beforehand, the impairment is shown to increase systematically with the number of steps involved in the presentation of the word fragment (Experiment 3) and also to persist when the time allowed for completion of the final version of the fragment is increased from 4 s to a full minute (Experiment 5). 相似文献
34.
E Müller A Schapowahl A Seel?nder 《Psychiatrie, Neurologie, und medizinische Psychologie》1984,36(8):480-488
The somatic and psychosocial development of 80 subjects with manifest affective-phasic psychoses is studied retrospectively and compared with that of an identically sized control group consisting of neuropsychiatrically healthy subjects. Statistically significant differences were found particularly in the answers to questions dealing with social situation and social adaptability. Achievement at school and vocational qualifications were lower among the parents of the patients than among those of the healthy subjects. Characteristic features of the patients' childhood and adolescence were transient depression, often for no apparent cause, and maladaption, and vocational wishes were fulfilled less often than among the controls. The patients experienced greater difficulty in settling in to a new group due to their contact difficulties. 相似文献
35.
T Krause W P Pankau A Wagner J L?ssner 《Psychiatrie, Neurologie, und medizinische Psychologie》1984,36(9):545-550
By 48 patients with Wilson's disease the brainstem acoustic evoked potentials were stated. There were 35 pathological findings (73%), 13 were normal (27%). The waves, determined by the middle and upper brainstem (Pons and Mesencephalon) showed most of all pathological changes. Those patients with forms of Wilson's disease called Pseudoskelerose and Pseudoparkinson showed the most pathological findings. But one could watch these findings by about 30% of patients in preclinical stage. This method can possibly be used for early detection of disorders of brainstem functions and in the same way it can be used for control of treatment by patients in preclinical stage. 相似文献
36.
37.
38.
39.
40.