共查询到20条相似文献，搜索用时 156 毫秒
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流媒体（Streaming Media）指在数据网络上按时间先后次序传输和播放的连续音/视频数据流。流媒体数据流具有三个特点：连续性（Continuous）、实时性（Real-time）、时序性,即其数据流具有严格的前后时序关系。由于流媒体的这些特点,它已经成为在Internet上实时传输音/视频的主要方式。 相似文献
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本文阐述了如何在OpenCV下按视频帧率(FPS)播放视频。程序使用了Windows系统下的高精度计时器控制视频播放的帧间隔时间。本文给出了高精度计时器的使用方法、实现时间控制功能的主要程序片段,并在文章的最后比较了高精度计时器与一般计时函数的精度。 相似文献
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针对在使用PowerPoint中需要报告人利用鼠标或键盘直接控制等问题,设计了PowerPoint遥控播放系统,利用无线遥控器便可以控制PowerPoint的上下翻页。系统通过USB总线与主机相连,采用WindowsNT自带的HID类与USB设备进行通信,无须安装驱动程序,具有广泛的应用前景。 相似文献
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本文首先给出了PowerPoint中播放Flash动画的简单方法,进而介绍了精确控制Flash动画播放的方法,并为命令按钮添加代码. 相似文献
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Authonvare在Authorware中控制数字化电影播放有多种方法,一般是通过DirectMedia Xtra插件和Movie控件来实现对数字化电影播放的控制,充分运用这两种方法,可以解决大多数的数字化电影的插放控制问题,使开发出来的多媒体作品更加丰富多彩。 相似文献
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曾凡斌 《科学．经济．社会》2010,28(4):149-154
整体上市是指一家公司将其主要资产和业务整体改制为股份公司进行上市的做法。辽宁出版传媒选择整体上市不仅有着深刻的政策背景,也是我国传媒资本经营的必然发展。整体上市来源于对剥离上市的扬弃,剥离上市不可避免地引发了大量的关联交易,而不公允的关联交易会给传媒上市公司带来风险。本文以辽宁出版传媒为例,分析了其上市前后的财务资料,并且将其与A股的其他传媒上市公司的财务资料进行对比分析,发现辽宁出版传媒整体上市后,在经营绩效等方面都有一定的提高,产生了有效的市场效应,辽宁出版传媒在资本运营效能上优于传媒板块其他上市传媒公司。本文还对传媒整体上市做出展望,指出传媒整体上市只是为解决自身体制机制问题提供一个平台,整体上市之后传媒企业如何利用资本市场机制改变原有的低效率现象,有效解决公司治理问题,还有待进一步的研究。 相似文献
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在教学中我们经常使用PowerPoint制作课件,在用PowerPoint制作多媒体课件的时候,若加入flash动画、视频和声音,可以在教学过程中增强课件的表现力,起到很好的教学效果。 相似文献
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Yunhua Hu Hang Li Yunbo Cao Li Teng Dmitriy Meyerzon Qinghua Zheng 《Information processing & management》2006
In this paper, we propose a machine learning approach to title extraction from general documents. By general documents, we mean documents that can belong to any one of a number of specific genres, including presentations, book chapters, technical papers, brochures, reports, and letters. Previously, methods have been proposed mainly for title extraction from research papers. It has not been clear whether it could be possible to conduct automatic title extraction from general documents. As a case study, we consider extraction from Office including Word and PowerPoint. In our approach, we annotate titles in sample documents (for Word and PowerPoint, respectively) and take them as training data, train machine learning models, and perform title extraction using the trained models. Our method is unique in that we mainly utilize formatting information such as font size as features in the models. It turns out that the use of formatting information can lead to quite accurate extraction from general documents. Precision and recall for title extraction from Word are 0.810 and 0.837, respectively, and precision and recall for title extraction from PowerPoint are 0.875 and 0.895, respectively in an experiment on intranet data. Other important new findings in this work include that we can train models in one domain and apply them to other domains, and more surprisingly we can even train models in one language and apply them to other languages. Moreover, we can significantly improve search ranking results in document retrieval by using the extracted titles. 相似文献
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Windows Server 2003中提供了RIS和Installer两种技术,前者是远程安装服务,通过Windows Server为网络中的客户机提供操作系统的远程安装,后者则是专门解决在Windows网络环境中发布应用软件的需求。此外,Windows Server 2003还提供了快速部署变更的功能。 相似文献
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从大学生创新性项目管理系统的需求实际出发,考虑用基于角色的权限管理模型来解决在系统中可能存在的各个角色所能拥有的权限问题。对该系统的权限管理模型进行了数据库模型设计,同时对系统运行的机理进行了简要说明。 相似文献
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《Information processing & management》2019,56(3):584-608
“We the Media” networks are real time and open, and such networks lack a gatekeeper system. As netizens’ comments on emergency events are disseminated, negative public opinion topics and confrontations concerning those events also spread widely on “We the Media” networks. Gradually, this phenomenon has attracted scholarly attention, and all social circles attach importance to the phenomenon as well. In existing topic detection studies, a topic is mainly defined as an "event" from the perspective of news-media information flow, but in the “We the Media” era, there are often many different views or topics surrounding a specific public opinion event. In this paper, a study on the detection of public opinion topics in “We the Media” networks is presented, starting with the characteristics of the elements found in public opinions on “We the Media” networks; such public opinions are multidimensional, multilayered and possess multiple attributes. By categorizing the elements’ attributes using social psychology and system science categories as references, we build a multidimensional network model oriented toward the topology of public opinions on “We the Media” networks. Based on the real process by which multiple topics concerning the same event are generated and disseminated, we designed a topic detection algorithm that works on these multidimensional public opinion networks. As a case study, the “Explosion in Tianjin Port on August 12, 2015″ accident was selected to conduct empirical analyses on the algorithm's effectiveness. The theoretical and empirical research findings of this paper are summarized along the following three aspects. 1. The multidimensional network model can be used to effectively characterize the communication characteristics of multiple topics on “We the Media” networks, and it provided the modeling ideas for the present paper and for other related studies on “We the Media” public opinion networks. 2. Using the multidimensional topic detection algorithm, 70% of the public opinion topics concerning the case study event were effectively detected, which shows that the algorithm is effective at detecting topics from the information flow on “We the Media” networks. 3. By defining the psychological scores of single and paired Chinese keywords in public opinion information, the topic detection algorithm can also be used to judge the sentiment tendencies of each topic, which can facilitate a timely understanding of public opinion and reveal negative topics under discussion on “We the Media” networks. 相似文献
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汉诺塔问题是经典递归程序设计案例,一直以来,大家多利用面向对象、过程等编程语言来实现。当今人工智能发展迅速,能否利用人工智能语言解决汉诺塔问题成为一个新的研究领。此次研究利用结构式分析方法,借助人工智能语言推理强的特征,解决了汉诺塔问题。 相似文献
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Cecile Paris Nathalie Colineau Surya Nepal Sanat Kumar Bista Gina Beschorner 《Ethics and Information Technology》2013,15(4):301-316
With the emergence and rapid growth of Social Media, a number of government departments in several countries have embraced Social Media as a privilege channel to interact with their constituency. We are exploring, in collaboration with the Australian Department of Human Services, the possibility to exploit the potential of social networks to support specific groups of citizens. To this end, we have developed Next Step, an online community to help people currently receiving welfare payments find a job and become financially self-sufficient. In this paper, we explore some ethical issues that arise when governments engage directly with citizens, in particular with communities in difficult situations, and when researchers are involved. We describe some of the challenges we faced and how we addressed them. Our work highlights the complexity of the problem, when an online community involves a government department and a welfare recipient group with a dependency relationship with that department. It becomes a balancing act, with the need to ensure privacy of the community members whilst still fulfilling the government’s legal responsibilities. While difficult, these issues must be addressed if governments are to engage with their citizens using Social Media. 相似文献
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介绍了PowerPoint新增的功能、特点和使用谊软件设计、制作、播放演示文稿的方法，以及创建web页，在Internet上发布演示文稿实现信息交流和资源共享，提高数字化信息服务的水平。 相似文献