Video retargeting using optimized crop-and-scale

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.     

从奥斯卡金像奖看不同时期好莱坞电影的发展变化

奥斯卡奖作为好莱坞的风向标,对世界影坛的影响举足轻重。文章通过对奥斯卡奖历程的回顾,分析好莱坞电影在不同发展时期的特点,探讨其传播方式和传播目的的转变。     

大西洋两岸的巴赞

经典电影美学中最重要的理论家——巴赞在英美电影美学和欧洲电影美学中有着不同影响。通过这些不同影响来描述当代西方电影美学发展的两种不同方向,及其造成的不同效果,对于亟待发展的中国电影产业和中国电影美学提供了重要的启示。     

Language use in kindergarten science lessons: language production and academic language during a video feedback coaching intervention in kindergarten science lessons

This paper aims to gain insight into language production and academic language of 4- and 5-year-old students and their teachers in the course of a teacher intervention during kindergarten science education. The study is based on videotaped classroom observations, and specifically focuses on the academic language use of students (N_intervention = 18, N_controls = 26) and teachers (N_intervention = 5, N_controls = 5). The results suggest that this general teacher intervention yields interesting changes in language use and production. Patterns of change over time confirm the idiosyncratic and non-linear nature of these changes. Science lessons represent an appropriate context in which to acquaint students with academic language, which can be used as a basis to build upon more sophisticated language skills.     

类型电影竞争力超网络研究

中国作为全球第二大电影市场,电影产业链逐渐完善,各种类型电影制作经验也日益丰富。为了用更科学的方法分析我国电影行业发展现状,以统计的 435 个电影名称为节点、电影所属类型为超边,建立电影超网络,并分析超网络的拓扑性质,将各个年份的拓扑性质进行对比,得出电影之间竞争情况以及各类型电影分布情况。该方法不仅能够更科学地分析电影市场发展现状与竞争情况,也可以用于其它领域竞争力的研究。     

公选课《微生物与人类》的教学探索与思考

基于公选课的开设目的,根据开设公选课《微生物与人类》的教学实践,介绍了该门课程教学内容的设置,对教学过程中影片教学法、案例教学法、问题导向式教学法等教学方法的实施进行了探讨,并对教学考核的实施进行了阐述。     

网络体育直播的受众互动研究——以腾讯体育NBA频道为例

本文在深入剖析腾讯网NBA直播的方式与策略的基础上,提出了目前腾讯直播中存在的创新不够、直播人员专业性有待提高以及对用户服务力度不足等三个方面的问题。然后提出了腾讯体育NBA视频直播未来的发展方向:以互动性创新带动发展、提高直播人员专业性水平、优化用户的观赛体验等。最终以提高腾讯体育直播的受众互动性,从而提高腾讯体育直播在互联网时代多平台竞争下的竞争力,助力于网络视频体育直播的发展。     

流媒体课件中流式素材的制作

探讨了流媒体课件中流式素材的制作，主要论述了流式文本、流式音频和流式视频素材的制作方法与制作技巧。给出了具体的制作实例，分析了流化的过程和流式文件的有关属性。     

铁电薄膜的相变和介电性质的格林函数理论研究

对用格林函数方法研究铁电材料的相变性质和介电性质的研究作了一个较为详细的分析和总结，对现有文献中的处理方法进行了讨论。     

浅论视频会议给现代企业管理带来的机遇

视频会议是当前发展最快的多媒体通信方式，它克服了传统会议模式的种种弊端，并具备传统会议模式所无法具备的优势，它为企业在越来越激烈的竞争环境中获得更多及时、可信的信息，提高企业的决策速度和水平，从而使企业的管理水平提高，获得更多的市场机会和巨大的利益。