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   614篇
  免费   12篇
教育   415篇
科学研究   49篇
各国文化   60篇
体育   24篇
综合类   1篇
文化理论   8篇
信息传播   69篇
  2021年   6篇
  2020年   12篇
  2019年   8篇
  2018年   10篇
  2017年   14篇
  2016年   14篇
  2015年   13篇
  2014年   16篇
  2013年   142篇
  2012年   14篇
  2011年   17篇
  2010年   10篇
  2009年   12篇
  2008年   9篇
  2007年   12篇
  2006年   18篇
  2005年   8篇
  2004年   11篇
  2003年   6篇
  2002年   10篇
  2001年   8篇
  2000年   7篇
  1999年   8篇
  1998年   11篇
  1997年   6篇
  1996年   4篇
  1995年   12篇
  1994年   10篇
  1993年   12篇
  1992年   11篇
  1991年   13篇
  1990年   9篇
  1989年   10篇
  1988年   6篇
  1987年   12篇
  1986年   7篇
  1985年   7篇
  1984年   5篇
  1983年   7篇
  1982年   11篇
  1981年   5篇
  1980年   4篇
  1979年   4篇
  1978年   7篇
  1977年   7篇
  1976年   4篇
  1975年   4篇
  1973年   12篇
  1971年   4篇
  1970年   4篇
排序方式: 共有626条查询结果,搜索用时 14 毫秒
1.
2.
3.
4.
本文以科学博物馆和科学中心的发展阶段为线索,综述了几个世纪以来科学传播的历史发展,阐述了科学实践如何嵌入到博物馆的展览实践之中并从中发展起来,以及关于科学在社会中的地位的观念变化如何在科学博物馆和科学中心得到反映,还展现了日益受到关注的科学传播如何在科学博物馆和科学中心层面体现出以公众需求为本。  相似文献   
5.
The popularity of adolescent fantasy movies about cosmic war and the enjoyment of military adventures that we find in World War II movies suggest the unique importance of war-themed culture in fostering solidarity in large, complex, and factionalized societies. War movies offset the power of sub-cultural movements by emphasizing the togetherness to be found in patriotic attachment to the whole society. A review of the history of recent war movies such as Ender's Game and The Monuments Men raises the possibility of a new militarism among young people. However, the persistence of war-weariness indicates that young people may differentiate fantasies of combat from the recognition of the horrors of real war.  相似文献   
6.
Courtship is a fertile setting for culturally defined strategies. A common form of competition is criticizing the other group for being inadequate mates. Stories about romance between human beings and non-human participants allow such criticism. Movies about men finding mechanical partners are common. Non-human females are seen as more satisfactory than women, especially when women are transforming their roles to be less subservient.  相似文献   
7.
With the noted popularity of social networking sites, people increasingly rely on these social networks to address their information needs. Although social question and answering is potentially an important venue seeking information online, it, unfortunately, suffers from a problem of low response rate, with the majority of questions receiving no response. To understand why the response rate of social question and answering is low and hopefully to increase it in the future, this research analyzes extrinsic factors that may influence the response probability of questions posted on Sina Weibo. We propose 17 influential factors from 2 different perspectives: the content of the question, and the characteristics of the questioner. We also train a prediction model to forecast a question's likelihood of being responded based on the proposed features We test our predictive model on more than 60,000 real-world questions posted on Weibo, which generate more than 600,000 responses. Findings show that a Weibo's question answerability is primarily contingent on the questioner versus the question. Our findings indicate that using appreciation emojis can increase a question's response probability, whereas the use of hashtags negatively influences the chances of receiving answers. Our contribution is in providing insights for the design and development of future social question and answering tools, as well as for enhancing social network users’ collaboration in supporting social information seeking activities.  相似文献   
8.
9.
The retention and extinction of a visual discrimination was examined in BALB/c mice. The mice were trained to perform a go/no-go discrimination task in parallel runways. Initial training resulted in an intermediate level of performance. Testing consisted of an additional session using either retention (Experiment 1) or extinction (Experiment 2) at one of five time intervals between 1 and 30 days. It was found in Experiment 1 that forgetting progressively increased over intervals of between 14 and 30 days. In Experiment 2, extinction testing induced more impairment of performance, so that forgetting occurred earlier relative to retention testing in Experiment 1. However, in both experiments, the measure of performance by a discrimination ratio revealed the same amount of forgetting when the training-test interval was 30 days. These results define the forgetting curve for such a discrimination by mice. They are discussed in terms of possible factors involved in forgetting.  相似文献   
10.
Toddlers displaying extremely inhibited behavior may be at risk for becoming socially withdrawn. However, behavioral inhibition may be a multifaceted characteristic, and its concurrent relation to toddler wariness with peers has not been examined. In this study, 108 toddlers (54 females) and their mothers were observed in novel situations involving unfamiliar settings, adults, and peers. Vagal tone, temperament, separation-reunion behavior, and maternal oversolicitousness also were assessed. There was little consistency of inhibited behavior across the 3 situations. Consistently inhibited toddlers had fearful temperaments, showed distress following maternal separation, and had mothers who were warm and controlling but unresponsive to children's cues during interaction. Toddlers with highly fearful temperaments and highly oversolicitous mothers were the most inhibited across contexts.  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