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   24685篇
  免费   826篇
  国内免费   12篇
  25523篇
  2019年   240篇
  2018年   356篇
  2017年   406篇
  2016年   409篇
  2015年   264篇
  2014年   349篇
  2013年   1880篇
  2012年   670篇
  2011年   755篇
  2010年   463篇
  2009年   424篇
  2008年   634篇
  2007年   628篇
  2006年   589篇
  2005年   540篇
  2004年   534篇
  2003年   493篇
  2002年   542篇
  2001年   746篇
  2000年   777篇
  1999年   589篇
  1998年   306篇
  1997年   257篇
  1993年   240篇
  1992年   483篇
  1991年   434篇
  1990年   471篇
  1989年   444篇
  1988年   417篇
  1987年   425篇
  1986年   435篇
  1985年   445篇
  1984年   372篇
  1983年   341篇
  1982年   272篇
  1981年   258篇
  1979年   423篇
  1978年   307篇
  1977年   281篇
  1976年   251篇
  1975年   372篇
  1974年   395篇
  1973年   368篇
  1972年   338篇
  1971年   293篇
  1970年   262篇
  1969年   326篇
  1968年   363篇
  1967年   326篇
  1966年   329篇
排序方式: 共有10000条查询结果,搜索用时 7 毫秒
971.
972.
973.
The validity of Ramsey's three factor model of vocational commitment – consisting of ego-involvement (ranging from altruism to self-orientation), pre-dispositions, and occupational possibilities – is examined Although no data is provided relevant to the altruism end of the ego-involvement continuum, analyses of data from a sample of trainee nurses indicated that the three measures of self-orientation, predispositions, and occupational possibilities possessed satisfactory internal consistency and discriminant validity, thus providing support for the three-dimensional model.  相似文献   
974.
975.
A field experiment was designed in which students approached sales personnel in 31 different retail settings, asking for help in selecting toys for a twin niece and nephew, 5 years of age. A majority of salesperson suggestions involved a sex-stereotypic selection of toys for both the male and the female child. Limited support was found for hypotheses that the responses of sales personnel would vary by retail setting (specialized toystore, department store, dimestore/discount store) and by sex of salesperson; responses did not vary by salesperson's age, however. Because more different toys are available for boys than for girls, female role expansion in children's play activities is a more likely outcome than sex-role convergence.This article is a revision of a paper presented at the annual meeting of the American Sociological Association, New York, August 1976.  相似文献   
976.
This article takes a sociological approach to a problem that has usually been considered as a psychological phenomenon. It addresses the problem of male—female interactions in work situations utilizing the organizational concepts of division of labor and legitimacy. Traditional explanations evoking sex-role socialization are reviewed and rejected for purposes of experimentation and intervention. An alternative argument, focusing on the structural arrangements of organizational settings, is presented as an explanation for behavioral effects previously attributed to inherent sex differences. The results of a pilot study are briefly described, and directions for further experimentation and possible intervention strategies are suggested.The bibliographic search and initial conceptualization of this research was supported by a grant from the Ford Foundation under the auspices of the Center for Research on Women at Stanford University. We are grateful to Miriam Rosen for much of the bibliographic work. The pilot study was supported in part by funds from the Guggenheim Foundation and by a grant from the Spencer Foundation. We also wish to thank Richard Torres and Christie Timberlake for their invaluable assistance on this project.  相似文献   
977.
978.
Semantic and geometric or physical similarity were manipulated separately in a backward-masking situation. When the target was a word to be read aloud, formal similarity between the letters of target and mask facilitated target recognition, as did associative similarity. Masking a target word by its own anagram also facilitated whole word report. In contrast, formal similarity was inhibitory rather than facilitatory of report when the target was spelled letter-by-letter, rather than read whole. This was true even for the same target words whose whole report was facilitated by formal similarity. A model to account for this reversal in the broader context of the neural substrate of reading is advanced. It is proposed that letter and word processing are fundamentally different in that letters are recognized by hierarchical feature analysis while words are stored and recognized wholistically by diffuse and redundant networks. Implications of the results for the study of reading are discussed.  相似文献   
979.
After being either attacked or treated in a more neutral manner by an experimental confederate, male subjects shocked the confederate while being stimulated by loud noise. Among previously attacked subjects, possession of control over offset of the noise led to the delivery of shocks significantly shorter in duration than those given by subjects who did not have control. Mere predictability of noise offset did not have the same effect. Subjects who could control the noise did not differ from those who heard no noise with respect to the duration of shocks given. Noise had no effect on shock duration among nonattacked subjects. In a follow-up study subjects who were given bogus information that they were aroused by noise were less punitive toward an attacking confederate than subjects given no such information. The overall conclusion is that noise facilitates aggression in subjects who have been instigated to aggress to the degree that noise-produced arousal is misattributed to the instigating stimulus.  相似文献   
980.
A measurement system is described for the computerized detection, digitizing, and storage of electromyographic (EMG) signals from up to eight muscle groups. The use of a channel scanning technique allows almost simultaneous multichannel recording with minimal circuit redundancy. Specifically, the scanning electromyograph allows several EMG preamplifiers to share expensive isolation, signal-conditioning, and interface circuitry. The design incorporates monolithic integrated circuit preamplifiers and includes optical isolation of the preamplifier circuitry for protection of the subject. Hybrid active filter modules allow convenient selection of system bandpass characteristics. Key measurement parameters are software programmable. The scanning electromyograph is inexpensively constructed from readily available componentry. Specifications for all functional blocks within the instrument are comparable to those of commercial instrumentation.  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