首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   54110篇
  免费   2207篇
  国内免费   30篇
  56347篇
  2020年   641篇
  2019年   785篇
  2018年   1128篇
  2017年   1115篇
  2016年   1187篇
  2015年   802篇
  2014年   972篇
  2013年   4750篇
  2012年   1750篇
  2011年   1893篇
  2010年   1109篇
  2009年   1115篇
  2008年   1729篇
  2007年   1716篇
  2006年   1499篇
  2005年   1363篇
  2004年   1338篇
  2003年   1205篇
  2002年   1251篇
  2001年   1774篇
  2000年   1679篇
  1999年   1292篇
  1998年   687篇
  1997年   587篇
  1996年   536篇
  1995年   543篇
  1994年   514篇
  1993年   529篇
  1992年   1035篇
  1991年   970篇
  1990年   958篇
  1989年   874篇
  1988年   829篇
  1987年   815篇
  1986年   823篇
  1985年   873篇
  1984年   682篇
  1983年   594篇
  1982年   499篇
  1979年   671篇
  1978年   501篇
  1976年   460篇
  1975年   601篇
  1974年   631篇
  1973年   597篇
  1972年   543篇
  1971年   473篇
  1968年   544篇
  1967年   542篇
  1966年   478篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
901.
Transient, focal, epileptic-like electrical changes in the temporal lobe, without convulsions, have been hypothesized to be primary correlates of religious experiences. Given these properties, direct measurement of these phenomena within the laboratory should be rare. However, two illustrated instances have been recorded. The first case involved the occurrence of a delta-wave-dominant electrical seizure for about 10 sec. from the temporal lobe only of a Transcendental Meditation teacher during a peak experience within a routine TM episode. The second case involved the occurrence of spikes within the temporal lobe only during protracted intermittent episodes of glossolalia by a member of a pentecostal sect . Neither subject had any psychiatric history. These observations are commensurate with the hypothesis that religious experiences are natural correlates of temporal lobe transients that can be detected by routine EEG measures.  相似文献   
902.
903.
Apparent similarities between S. Schachter's stimulus binding construct and H. A. Witkin's construct of psychological differentiation, specifically field dependence, have been noted in the literature. The present study examined field dependence on the rod-and-frame test among 20 obese and 42 average-weight subjects. Obese subjects were more field-dependent than were average-weight subjects. Women were slightly more field-dependent than were men. The author concluded that obese persons are more field-dependent and speculated that the constructs may be describing similar phenomena.  相似文献   
904.
The effects of learning on the discrimination of computer-synthesized speech was assessed by presenting 100 computer-produced monosyllabic words to 2 groups of 15 adult subjects. One group's errors were corrected while the other group's errors were uncorrected. A comparison of errors on the first 50 vs the second 50 presentations showed significant improvement for corrected group only. It was concluded that the discrimination of computer-synthesized monosyllables can be improved with correction of errors but is still about 14% poorer than the discrimination of human speech.  相似文献   
905.
906.
907.
908.
The present study based on the indirect Clausen-test using NTA and PHA as antigens contributed to therapy control and possibly prognosis assessment rather than to immunological differential diagnosis.  相似文献   
909.
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   
910.
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   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号