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   37958篇
  免费   1486篇
  国内免费   16篇
  39460篇
  2020年   440篇
  2019年   559篇
  2018年   749篇
  2017年   814篇
  2016年   821篇
  2015年   572篇
  2014年   698篇
  2013年   2973篇
  2012年   1281篇
  2011年   1273篇
  2010年   830篇
  2009年   789篇
  2008年   1139篇
  2007年   1163篇
  2006年   1035篇
  2005年   915篇
  2004年   865篇
  2003年   804篇
  2002年   820篇
  2001年   1173篇
  2000年   1122篇
  1999年   870篇
  1998年   376篇
  1997年   379篇
  1995年   357篇
  1994年   344篇
  1993年   343篇
  1992年   736篇
  1991年   651篇
  1990年   703篇
  1989年   605篇
  1988年   638篇
  1987年   596篇
  1986年   604篇
  1985年   543篇
  1984年   504篇
  1983年   482篇
  1982年   343篇
  1979年   570篇
  1978年   396篇
  1975年   460篇
  1974年   498篇
  1973年   537篇
  1972年   397篇
  1971年   391篇
  1970年   350篇
  1969年   402篇
  1968年   484篇
  1967年   436篇
  1966年   360篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
261.
A microcomputer running a spreadsheet program makes an excellent visual aid for demonstrating statistical concepts and procedures. Some advantages of this setup over traditional visual aids are described. Several statistical demonstrations that I have found to work well are presented.  相似文献   
262.
The purpose of the present paper is to describe and compare some inexpensive software packages that calculate a variety of statistics on microcomputers running MS-DOS. For each package, hardware requirements, program capabilities, limitations, accuracy, error handling, and other features are considered.  相似文献   
263.
In this paper, digital filters are described for concurrent adaptive estimation of the spectral powers at several target frequencies. Least-squares estimation is used, with a tapered weight function that discounts time-series data according to age. Frequency selectivity and reliability of spectral estimates are controlled by different parameters. The spectral windows are closely approximated by Student’st distribution, which is useful in the planning of experiments.  相似文献   
264.
265.
Discrimination of facial expressions of emotion by depressed subjects   总被引:2,自引:0,他引:2  
A frequent complaint of depressed people concerns their poor interpersonal relationships. Yet, although nonverbal cues are considered of primary importance in interpersonal communication, the major theories of depression focus little attention on nonverbal social perception. The present study investigated the ability of depressed, disturbed control, and normal American adults to make rapid discriminations of facial emotion. We predicted and found that depressed subjects were slower than normal subjects in facial emotion discrimination but were not slower in word category discrimination. These findings suggest that current theories of depression may need to address difficulties with nonverbal information processing. There were also no significant differences between depressed and disturbed control subjects, suggesting that the unique social-behavioral consequences of depression have yet to be identified.  相似文献   
266.
One-session treatment for specific phobias   总被引:6,自引:1,他引:5  
A rapid and effective treatment for specific phobias, in which the treatment is done in one single session, is described in detail. The treatment method consists of a combination of exposure in vivo and modeling. The short- and long-term outcome for a consecutive series of 20 patients are reported. Mean treatment time was 2.1 h and at follow-up after an average of 4 yr 90% were much improved or completely recovered.  相似文献   
267.
268.
The purpose of this work is to explore the phenomenon of negativism and the analyst's response to it during the course of analytic work with a patient in whom negativism is a central behavioral pattern. Melville's short story, "Bartleby the Scrivener," describing in telling detail the response of a sympathetic lawyer to profound and pervasive negativism in his legal scribe, is discussed as a literary analogy to the analyst-analysand dyad. Aspects of the concept of negativism within psychoanalysis are discussed. The potential usefulness of understanding certain unexpected countertransference responses to pervasive negativism is explored, as this is a relatively neglected area of psychoanalytic technique. A case is presented describing the analysis of a patient whose character, like Bartleby's, is a mixture of profound negativism along with schizoid, obsessional, and masochistic elements.  相似文献   
269.
In three experiments, the effect of target luminance on estimates of visual persistence was determined on a popular successive-field task. Even though the experiments differed from each other only in terms of minor changes in stimulus conditions, very different effects were obtained across the three experiments. The different findings were attributed to the often overlooked roles of masking and target degradation on tasks of persistence. Implications for the numerous contradictory findings in the persistence literature are discussed, and the current popularity of the successive-field task is questioned.  相似文献   
270.
The author outlines his clinical observations during the "middle game" of psychoanalysis, leading to recognition that structural change is taking place. "Middle game," "structure," process, and content are defined and critically discussed. Illustrative clinical vignettes are offered. The presentation emphasizes the importance of an active and resolving transference "struggle"; in addition, more traditionally noted criteria are briefly touched on, e.g., development of observing ego and treatment alliance, changes in dream function and communication, and the reviewing of the neurosis and transference during the termination phase as instances of mourning and working through. The concept of optimal psychobiological function in the service of a homeostatic principle is discussed.  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