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   3055篇
  免费   135篇
  国内免费   1篇
  2023年   19篇
  2022年   20篇
  2021年   33篇
  2020年   50篇
  2019年   57篇
  2018年   78篇
  2017年   95篇
  2016年   119篇
  2015年   65篇
  2014年   91篇
  2013年   386篇
  2012年   166篇
  2011年   161篇
  2010年   100篇
  2009年   89篇
  2008年   151篇
  2007年   130篇
  2006年   122篇
  2005年   107篇
  2004年   113篇
  2003年   111篇
  2002年   79篇
  2001年   63篇
  2000年   60篇
  1999年   43篇
  1998年   39篇
  1997年   37篇
  1996年   35篇
  1995年   39篇
  1994年   28篇
  1993年   33篇
  1992年   32篇
  1991年   27篇
  1990年   35篇
  1989年   21篇
  1988年   30篇
  1987年   19篇
  1986年   15篇
  1985年   22篇
  1984年   24篇
  1983年   15篇
  1982年   24篇
  1981年   11篇
  1979年   22篇
  1978年   15篇
  1977年   18篇
  1974年   19篇
  1972年   13篇
  1970年   11篇
  1968年   11篇
排序方式: 共有3191条查询结果,搜索用时 62 毫秒
111.
The gateway sign configuration has been effective at increasing motorist yielding and reducing speeds at crosswalks. A gateway configuration uses in-street signs at a crosswalk on each edge of the roadway and on each lane line. Although this intervention is effective at increasing motorist yielding at uncontrolled crosswalks, the limits of the intervention have yet to be tested. The present study examined if 1) the effects of the gateway intervention on one crosswalk would generalize to an untreated adjacent crosswalk, and 2) if the effects of an offset configuration of signs which partially treated each crosswalk could maximize the effects of that generalization. Experiment 1 showed that less yielding occurred at the untreated crosswalk than at the treated crosswalk, though yielding was higher than baseline. In Experiment 2, results showed that an offset gateway configuration could produce comparable levels of yielding at both crosswalks.  相似文献   
112.

The aim of this article is threefold. First, we seek to elicit the attitudes and practices of middle-aged and elderly Moroccan Muslim women towards ageing and care for the elderly. Second, we aim to identify possible differences between middle-aged and elderly women’s attitudes and practices. Third, we seek to explore which role religion plays in their attitudes and practices. Qualitative empirical research was conducted with a sample of middle-aged and elderly Moroccan Muslim women living in Antwerp (Belgium) (n = 30) and with experts in the field (n = 15). Our study unveils that ageing and care for the elderly are clearly understood from a religious framework. More specifically, theological and eschatological considerations take up a central position. Access to and utilization of professional elderly care is hampered by several barriers (e.g. religious, cultural and financial). We found a more open attitude towards professional elderly care among middle-aged women than among elderly women.

  相似文献   
113.

We investigate how epistemic injustice can manifest itself in mathematical practices. We do this as both a social epistemological and virtue-theoretic investigation of mathematical practices. We delineate the concept both positively—we show that a certain type of folk theorem can be a source of epistemic injustice in mathematics—and negatively by exploring cases where the obstacles to participation in a mathematical practice do not amount to epistemic injustice. Having explored what epistemic injustice in mathematics can amount to, we use the concept to highlight a potential danger of intellectual enculturation.

  相似文献   
114.
Shkatov  Dmitry  Van Alten  Clint J. 《Studia Logica》2020,108(2):221-237
Studia Logica - We apply the theory of partial algebras, following the approach developed by Van Alten (Theor Comput Sci 501:82–92, 2013), to the study of the computational...  相似文献   
115.
116.
Motivation and Emotion - Despite the theoretical importance and applied potential of situation modification as an emotion regulation strategy, empirical research on how people change situations to...  相似文献   
117.
Constant  Axel  Bervoets  Jo  Hens  Kristien  Van de Cruys  Sander 《Topoi》2020,39(3):611-622
Topoi - Autism Spectrum Condition (ASC) presents a challenge to social and relational accounts of the self, precisely because it is broadly seen as a disorder impacting social relationships. Many...  相似文献   
118.
Attention, Perception, & Psychophysics - Learning and imitating a complex motor action requires to visually follow complex movements, but conscious perception seems too slow for such tasks....  相似文献   
119.
Female rats, chronically treated with Testosterone Propionate (TP), were injected with Fluprazine (DU 27716) or saline and tested for social aggression, masculine and feminine sexual behavior. Fluprazine-treated females were less aggressive than saline-treated females, as indicated by a shift from offensive to less offensive parameters of aggression. At the same time, mounting in Fluprazine-treated females was almost totally abolished, both in aggression tests and in tests for sexual behavior. Feminine sexual responses increased during aggressive encounters but were slightly inhibited when females were confronted with sexually active males. Females treated with Fluprazine and tested for mounting with a receptive female showed a substantial increase of offensive aggression directed at the receptive stimulus female. It is concluded that Fluprazine does not selectively inhibit offensive aggression in TP-treated female rats.  相似文献   
120.
Symptom episodes often show a spatio-temporal structure, that is, they occur in a specific context for a certain duration. Repeated experiences may therefore be construed as associative learning trials, in which context elements are turned into predictive cues, triggering anticipatory processes conducive to subjective health complaints. A series of experiments, using inhalations of air enriched with CO2 and external (odors) or internal (mental images) stimuli as cues, is discussed to show that subjective health complaints may occur upon presenting the cue alone. Learned symptoms may be unrelated to bodily responses and easily generalize to new related cues. Better learning occurs to cues with a negative affective valence and in participants scoring high for negative affectivity. Our findings are relevant to the understanding of medically unexplained ("functional") syndromes and the poor relationship between objective and subjective health indicators in general.  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