搜索结果: 61-75 共查到“知识库 数字媒体技术”相关记录1427条 . 查询时间(3.974 秒)
Digital Media Player Controls Supporting Music Education
multimedia media players user interface user study music education
2015/7/30
Recent research on learning from selfobservation through video has shown positive effects on skill acquisition in various domains such as sports (Horn, Williams, & Scott, 2002; Guadagnoli, Holcomb, & ...
面向多维数字媒体的访问控制机制
访问控制 多维数字媒体 授权属性 访问权限动态缩减
2015/7/29
在多维数字媒体场景中,用户期望利用环境、时态等因素实现访问权限的自我约束。针对该需求,综合环境、时态、角色定义授权属性,提出面向多维数字媒体的访问控制机制,该机制定义用户—授权属性分配关系和授权属性—访问权限分配关系,根据用户的ID、属性信息、所处环境和时态、角色,用户—授权属性分配关系为用户分配相应授权属性;根据用户所赋予的授权属性,授权属性—访问权限分配关系为用户分配相应访问权限。引入约束条件...
WHAT DRIVES MEDIA SLANT? EVIDENCE FROM U.S. DAILY NEWSPAPERS
Bias text categorization media ownership
2015/7/17
Firms respond strongly to consumer preferences, which account for roughly 20 percent of the variation in measured
slant in our sample. By contrast, the identity of a newspaper’s owner explains far le...
Digital Communications Surveillance: A challenge for Rhetoric Studies
Rhetoric Studies Digital Communications Surveillance
2015/6/25
At one end, DCS is part of the burgeoning market in the generation
and processing of information and data and a response (albeit one that raises
social and ethical issues) to the changing capaciti...
一种应用于虚拟现实的基于网格变形的立体图像生成方法
3D显示 网格变形 感知深度 深度映射
2015/4/26
文章针对虚拟现实系统，介绍了立体图像的生成方法.提出了利用单个相机通过不同的投影变换来拍摄双眼图像.基于单相机拍摄的方法，分析了立体图像的视差形成机制，给出了有头跟踪设备和无头跟踪设备两种情况下双眼图像的视差变换矩阵.进一步分析了视差大小、感知深度、感知变形和模型变形之间的联系，将视差的产生归结为模型的几何变形.提出可以通过模型的几何变形来控制视差和感知物体的变形，从而给出了一种基于模型网格变形的...
基于转发传播过程的微博转发量预测
转发量预测 转发意愿 转发影响力
2015/2/3
微博已经成为日常生活中最流行的信息分享工具.转发是微博中信息传播的核心方法，所以转发量预测不仅是一个有趣的研究问题，也有较大的实际意义.然而，当前大部分研究只是把问题视为分类或回归问题，没有考虑转发的传播过程.本文中，我们提出一个符合转发传播过程的转发量预测模型.本文认为转发信息来自两方面：直接粉丝和间接粉丝，而粉丝带来的转发量由转发意愿和影响力决定.我们用历史行为和内容相关性来估算一名直接粉丝的...
Questions covered include: Can/should you "friend" a judge on Facebook? Can you use group coupon or daily deal marketing? Can you use text messages to solicit prospective clients? What are your ethica...
The Paralegal's Guide to Ethical Issues Related to Social Media Use and Advertising
Social media professional ethics marketing advertising paralegals law practice
2014/12/20
In recent years, Facebook, YouTube, Twitter, LinkedIn and others have become ethical minefields for legal professionals. With new regulations and rules in place and new questions raised, the ethical “...
Using Technology to Provide Multimodal Learning Opportunities and Enhance Student Engagement in Face-to-Face and Online Courses
Multimodal learning student engagement online courses learning styles assessment
2014/12/20
This poster showcases how the presenters incorporate a variety of technologies, media and interactive elements to provide multimodal learning opportunities and enhance student engagement in both face-...
Social Media Use and Other Complex Jury Issues
social media change of venue legal ethics jury issues electronic discovery legal research
2014/12/20
Chapter in seminar manual for Voir Dire and Jury Selection. Eau Claire, WI: National Business Institute, 2014. Updated version of a similar chapter for a 2013 seminar manual and presentation on the sa...
Large Scale Image Retrieval From Books
search engine image retrieval random walk book indexing large scale cloud computing
2014/12/8
Search engines play a very important role in daily life. As multimedia product becomes more and more popular, people have developed search engines for images and videos. In the first part of this thes...
针对目前基于H.264/AVC标准的视频半脆弱水印算法存在的问题,提出一种基于代价策略的H.264/AVC半脆弱水印算法。通过消除基于内容的特征码之间的相关性,提高内容认证水印的顽健性。为实现半脆弱水印既能准确定位篡改区域,又对视频质量和码率的影响最小,引入了一个代价函数,通过该函数在残差4×4块的DCT系数中选择一个最佳的系数嵌入水印。实验表明,所提算法嵌入水印对视频质量和码率的影响较小,半脆弱...
Pipeline ADC后台数字校正中传输函数建模算法
后台校正 插值算法 多项式插值
2014/6/20
采用后台校正技术,通过对级间余量放大器传输函数建模来估计误差,以提高流水线型ADC(analog to digital converter, ADC)的性能。为了在校正精度、硬件消耗、功率消耗和算法收敛速度之间做一个合理的权衡,需要在建模时选用一个合理的插值算法。以一个12位,采样频率40兆的流水线型ADC为原型,分别采用分段线性插值、三次多项式插值对第一级余量放大器传输函数建模,用硬件描述语言V...