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   18923篇
  免费   186篇
  国内免费   19篇
教育   12455篇
科学研究   3128篇
各国文化   128篇
体育   1312篇
综合类   7篇
文化理论   123篇
信息传播   1975篇
  2021年   182篇
  2020年   260篇
  2019年   370篇
  2018年   541篇
  2017年   500篇
  2016年   439篇
  2015年   291篇
  2014年   449篇
  2013年   3250篇
  2012年   410篇
  2011年   428篇
  2010年   356篇
  2009年   331篇
  2008年   377篇
  2007年   348篇
  2006年   297篇
  2005年   287篇
  2004年   297篇
  2003年   244篇
  2002年   250篇
  2001年   340篇
  2000年   357篇
  1999年   317篇
  1998年   171篇
  1997年   210篇
  1996年   211篇
  1995年   147篇
  1994年   186篇
  1993年   154篇
  1992年   274篇
  1991年   251篇
  1990年   244篇
  1989年   295篇
  1988年   235篇
  1987年   204篇
  1986年   260篇
  1985年   253篇
  1984年   204篇
  1983年   212篇
  1982年   167篇
  1981年   161篇
  1980年   159篇
  1979年   232篇
  1978年   175篇
  1977年   163篇
  1976年   149篇
  1974年   164篇
  1973年   143篇
  1972年   128篇
  1971年   146篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Relational transgressions are emotionally difficult for those who directly experience the transgression. Less is known about how transgressions affect those located within the personal network of a relational transgression victim. This study explored how network members engaged in support marshaling in response to another’s transgression experience. Results indicate that some participants marshaled support, citing four reasons for their actions: perceived insufficiency, camaraderie, personal ramifications, and personal values. We explore these reasons for marshaling support and discuss them within the broader context of support marshaling and relational transgressions.  相似文献   
103.
104.
With the rise of microfluidics for the past decade, there has come an ever more pressing need for a low-cost and rapid prototyping technology, especially for research and education purposes. In this article, we report a rapid prototyping process of chromed masks for various microfluidic applications. The process takes place out of a clean room, uses a commercially available video-projector, and can be completed in less than half an hour. We quantify the ranges of fields of view and of resolutions accessible through this video-projection system and report the fabrication of critical microfluidic components (junctions, straight channels, and curved channels). To exemplify the process, three common devices are produced using this method: a droplet generation device, a gradient generation device, and a neuro-engineering oriented device. The neuro-engineering oriented device is a compartmentalized microfluidic chip, and therefore, required the production and the precise alignment of two different masks.  相似文献   
105.
The authors examined the relationship between stress, adaptive coping, and life satisfaction among college students who reported having a friend or family member with eating disorder symptomatology. A hierarchical regression confirmed the study's hypotheses. Higher stress was linked with less life satisfaction. After stress was controlled, plan coping had a beneficial influence on life satisfaction. College counselors can use these findings when choosing interventions for clients who are close to someone with an eating disorder.  相似文献   
106.
107.
ABSTRACT

The literature on momentum is still undecided, with mixed results whether momentum exists or is only perceived to exist (“hot hand fallacy”). We explore whether momentum exists by looking at cases in which a basketball player has three consecutive free throws. A free throw is a well-defined task executed in a stable environment, allegedly giving momentum optimal chances to occur. Taking 14 NBA seasons we collected over 4500 three-free-throw sets (triplets). We obtained the outcomes of the shots as well as some additional variables about the player and the game: the player’s average free-throw percentage, home or away, and the game score and the quarter when the free throws were attempted. We first analyse the hit rates in the three shots and then proceed to regression analysis that also controls for the abovementioned variables. We address several concerns raised in the literature. All comparisons and analyses yield the same conclusion that there is no evidence for momentum in the data.  相似文献   
108.
109.
Neural engineering is an emerging field of high relevance to students, teachers, and the general public. This Feature presents online resources that educators and scientists can use to introduce students to neural engineering and to integrate core ideas from the life sciences, physical sciences, social sciences, computer science, and engineering into the classroom.  相似文献   
110.
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