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   4590篇
  免费   11篇
  国内免费   2篇
  2019年   5篇
  2018年   120篇
  2017年   100篇
  2016年   186篇
  2015年   100篇
  2014年   33篇
  2013年   69篇
  2012年   261篇
  2011年   254篇
  2010年   23篇
  2009年   24篇
  2008年   39篇
  2007年   32篇
  2006年   43篇
  2005年   1320篇
  2004年   658篇
  2003年   446篇
  2002年   138篇
  2001年   28篇
  2000年   12篇
  1999年   24篇
  1998年   5篇
  1994年   13篇
  1992年   25篇
  1991年   42篇
  1990年   58篇
  1989年   44篇
  1988年   26篇
  1987年   42篇
  1986年   39篇
  1985年   30篇
  1984年   25篇
  1983年   20篇
  1982年   3篇
  1979年   32篇
  1978年   10篇
  1977年   7篇
  1976年   10篇
  1975年   29篇
  1974年   32篇
  1973年   30篇
  1972年   25篇
  1971年   26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4603条查询结果,搜索用时 31 毫秒
31.
32.
The purpose of this paper is to present a new electromagnetic device which uses alternating magnetic fields for tracking movements of multiple points inside and outside the vocal tract. It is biologically safe, noninvasive, it does not interfere with speech movements, allows for multiple recording in the same subject, and for easy collection of large amounts of data. It is especially suitable for evaluation of patients with speech motor impairments.  相似文献   
33.
34.
A report on the clinical testing of the lithium-retard medicament Contemnol (Spofa). It details the way lithium-retard treatment is objectively and subjectively superior to the earlier and still current general lithium treatment.  相似文献   
35.
The results of an evaluation of the perfusion scintigraphy findings of 350 hospitalised neurological patients and 55 more strictly selected neurosurgical patients with cerebrovascular complaints, revealed an accuraty of 83%, a sensitivity of 89%, and a specificity of 83%. The selection of the patients had no influence on the results as a whole. Compared with contrast-medium angiography, incorrect diagnosis must be expected in 17% of the cases. This includes erroneous negative findings in 10% of the cases. Grounds for misinterpretations are suggested, and the biological and methodological limitations of the method are set forth.  相似文献   
36.
37.
The psychotherapeutic life-work of psychiatrist Arthur Kronfeld has almost fallen into oblivion. Against the background of the 100th anniversary of his birth the author traces Kronfeld's psychotherapeutic career, pointing out his activity at the Berliner "Institute of Sexual Research" under Magnus Hirschfeld, and his psychotherapeutic concept--the psychagogic guidance of the patient--and its connection with the individual psychology of Alfred Adler. Kronfeld translated his theoretical positions into activities directed towards socialization and the teachability of psychotherapy which are still worthy of note by those engaged in the field.  相似文献   
38.
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   
39.
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   
40.
It has been suggested that the systematic decline of partial report as the delay of the partial-report cue increases is due to a time-related loss of location information. Moreover, the backward masking effect is said to be precipitated by the disruption of location information before and after identification. Results from three experiments do not support these claims when new indices of location information and of item information are used. Instead, it was found that the systematic decline in partial report was due to a time-related loss of item information, and location information was affected neither by the delay of the partial-report cue nor by the delay of backward masking. Subjects adopted the "select-then-identify" mode of processing.  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