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   9544篇
  免费   127篇
  国内免费   94篇
教育   5111篇
科学研究   1219篇
各国文化   33篇
体育   407篇
综合类   478篇
文化理论   25篇
信息传播   2492篇
  2024年   3篇
  2023年   36篇
  2022年   89篇
  2021年   199篇
  2020年   364篇
  2019年   300篇
  2018年   229篇
  2017年   253篇
  2016年   304篇
  2015年   345篇
  2014年   653篇
  2013年   1198篇
  2012年   749篇
  2011年   674篇
  2010年   449篇
  2009年   432篇
  2008年   491篇
  2007年   557篇
  2006年   534篇
  2005年   508篇
  2004年   393篇
  2003年   341篇
  2002年   244篇
  2001年   217篇
  2000年   100篇
  1999年   29篇
  1998年   13篇
  1997年   20篇
  1996年   11篇
  1995年   7篇
  1994年   5篇
  1993年   6篇
  1992年   3篇
  1991年   2篇
  1989年   2篇
  1988年   1篇
  1987年   2篇
  1957年   2篇
排序方式: 共有9765条查询结果,搜索用时 15 毫秒
91.
The emergence of social media has radically transformed the way we create and consume information. These changes have in turn given rise to new models of librarianship centered on principles of participation, interaction, and collaboration. Over the last decade, academic libraries have eagerly adopted social media as a means of enhancing services and connecting with a new generation of users. But how exactly has this technology changed libraries? In what ways has the social web transformed library services or our relationships with users? This article attempts to assess the impact of social media on academic libraries in the United States through a review of the literature published since 2005. In particular, it looks at how academic libraries have used social media to improve or develop new services. By comparing published case studies with the theoretical literature, this article seeks to separate theory from practice and determine the extent to which the social web has transformed library practice. The author concludes that, despite several noteworthy examples, the majority of social library applications ultimately fail to live up to the transformative potential promised within the literature and that this failure may have more to do with philosophical rather than technical limitations.  相似文献   
92.
The independence of the media under Ghana’s Fourth Republic is assessed from the perspective of standards and professionalism. Using a qualitative method, the study shows that unethical practices are evident in the print media landscape in Ghana, and argues that this can be traced to four major spheres: educational qualification, existence of several professional associations, a weak regulatory body and “money matters”. Overall, the study argues that legalities form a minimal part of the independence of the Ghanaian media but concerns about freedom seem to be self-inflicted by the very media practitioners through their actions and sometimes questionable reportage.  相似文献   
93.
The emergence of “fake news” during the Brexit referendum and Trump election campaign sent news organisations scurrying to establish teams of journalists to debunk deliberately misleading stories and verify facts. This paper examines steps to counter false stories and asks whether normative values of objectivity are about to enjoy a comeback. Typical markers of objectivity (freedom from bias, detachment and fact-based reporting) date back to the nineteenth century and, despite being ingrained in the Anglo-American news culture, have always been subject to challenge. Recently, the growth of partisan and populist media has illustrated deep distrust in traditional news outlets and is questioning whether it is time to jettison objectivity. But are we experiencing a backlash? Through interviews with senior UK-based journalists at legacy news organisations and analysis of editorial policy statements prompted by a UK parliamentary inquiry, the paper explores how fake news is rekindling debate about objectivity and its potential to make quality journalism stand out. It argues that legacy news organisations in the United Kingdom have seized the opportunity to highlight the value of normative practices that draw on familiar components of the objectivity paradigm. But few have the financial strength to bolster the rhetoric with additional editorial resources.  相似文献   
94.
浅谈电子技术实验教学改革   总被引:1,自引:0,他引:1  
针对提高学员的3种能力进行电子技术实验的教学改革,根据实验教改的设计思路,介绍了实验教改的实施方案及实施过程,可以充分发挥学员的潜能,培养学员的创新能力。  相似文献   
95.
Mr. Robot is a cyber-thriller television show that premiered on USA Network during the summer of 2015. Apart from quickly becoming a cult hit, the show was lauded for accurately portraying hacker culture. The goal of this article is to isolate three specific cybersecurity issues that recur through the first season of Mr. Robot: personal cybersecurity, corporate cybersecurity, and remote access Trojans; and to determine what laws the characters are in violation of as well as recent case law that can be applied to them.  相似文献   
96.
ABSTRACT

Using a methodology inspired by structural narratology and by James Hamilton’s [2016. Democracy’s Detectives: The Economics of Investigative Journalism. Cambridge: Harvard] economic analysis of investigative journalism, this paper identifies a set of 14 recurring structural and formal elements (plot events, character types and functions, visual iconography) that constitute a fable about investigative journalism. The fable structure is applied to analyze six diverse films about investigative journalism produced in the US in the last 40 years. The films include two instantiations of successful investigative journalism (All the President’s Men, Spotlight), two cases where conflict between journalists and corporate managers diminished the impact of the investigation (Good Night and Good Luck, The Insider), and two instances of a counter-fable of failed investigative journalism (Truth, Kill the Messenger). The paper argues that the films’ representation of investigative journalism influences public perceptions of investigative journalism. It also speculates about the factors that will influence investigative journalism and its representations in the current political context in the US.  相似文献   
97.
中文电子病历的分词及实体识别研究   总被引:1,自引:0,他引:1  
[目的/意义]健康医疗大数据是我国重要的基础性战略资源,本研究对中文电子病历分词与实体识别的探讨与实证较好地完成了医疗数据的信息抽取任务,对今后医疗大数据在语义层面的应用发展具有重要意义。[方法/过程]本研究首先融合权威词表、官方标准、健康网站数据及其他医学补充词库构建了词语数量级达到10万的医学词表;然后对电子病历的字段进行分词,对比了jieba工具、导入词典后的jieba、无监督学习及AC自动机4种模型的分词效果;最后,以自动分词和人工标注结果为语料,实现基于条件随机场的电子病历实体识别研究,并比较不同实体类别以及不同文本特征下的实体识别效果,选出最优模板。[结果/结论]分词结果显示,AC自动机的效果最好,F值可达82%;实体识别结果表明,"检查"和"疾病"实体的识别效果最好,而"症状"的识别效果不太理想。  相似文献   
98.
针对Authoware作品在制作和播放过程中出现的特效无法正常显示;特殊字体的改变;视频播放不了等问题,提出了相应的解决方法。  相似文献   
99.
随着互联网技术的发展,微博、掘客等自媒体的使用,改变了媒体的传播格局。"自媒体"时代的来临,使青年学子被其信息形态的多元化、发布平台个性化等特点吸引,成为"自媒体"的最多使用群体,如何将"自媒体"为我所用,提高思政教育的实效性,成为了思政教育者需要面对的问题,本文就是在此现实基础上,进行了问卷调查分析了高校青年网络行为,并提出了引导策略。  相似文献   
100.
刘坚 《传媒观察》2020,(5):5-11,F0002
在新闻智能化传播的环境下,传统媒介的新闻信息资源理念发生变化,智能算法成为新闻信息资源获取和开发的重要手段。智能化传播的新闻信息价值判断,建构了新闻事实信息-社会数据信息-用户需求信息三位一体的新闻信息价值确认系统,体现了智能化新闻信息价值理念的特殊追求。新闻信息生产流程中人工智能系统与新闻传播者形成特殊的生产关系,新闻信息生产理念强调人机协作与共处,由此产生新闻报道视野和新闻产品形态的变化。智能化的新闻发布机制,促进了新闻信息的多渠道推送和分散化传播,也有力推动了传统媒介新闻信息传播理念的智能化转变。  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