H.264视频鲁棒传输的最优宏块模式选择

分析了受损宏块的信道失真及其差错扩散,研究了宏块编码模式对信源失真和信道失真的影响,提出了结合信源信道编码的一种基于率失真优化的快速模式选择算法。通过估算不同宏块模式的信源失真和信道失真,自适应地选择最佳编码模式,使得视频序列的整体传输失真最小。模拟实验显示,相对于H.264参考软件的模式选择算法,该算法显著降低了计算复杂度并提高了视频差错恢复性能。     

录制课堂实况录像的几个要素

介绍录制课堂实况录像的基本情况,分析了课堂实况录像中的几个要素,音视频信号的获取、人员配置、现场准备、沟通等,给出整个课堂实况录像的过程及注意的问题。     

非物质文化遗产名录项目申报录像制作解析——以"陈李济中药文化"项目为例

作为非物质文化遗产名录项目申报材料的组成部分,录像片在实际申报过程中具有重要的作用。本文以“陈李济中药文化”项目为例,结合录像片拍摄具体准备工作,就非物质文化遗产申报材料文字向图像的转化,做出个案解读。针对有关制作要求,结合具体拍摄实践,本文还提出了拍摄中需要注意的一些问题。     

日本移动影音的商业模式探析

在移动影音产业既有的成功商业模式之中,日本经验常被提及,其主要经营模式被归类为"免费播放"。一般认为,正是通过"免费播放"这种方式,才能从一开始就顺利实现让消费者对于移动电视由认识、接受到使用的历程。然而,日本移动电视之所以成功,并非完全归功于免费播放,还另有原因。     

基于信号处理优化设计的雷达性能改进

为解决机载对海搜索雷达在近海复杂环境条件下的目标有效探测问题,提出并采取增加一次视频通道和一次、二次视频叠加的技术方案,通过对信号处理进行优化的设计方法,包括视频预处理、视频图像处理、气象处理、数据处理等软件优化设计及必要的硬件改进等措施实现技术方案.经试飞验证,证明该方法效果较好.     

Video and the diasporic imagination of selfhood: A case study of the croatians in Australia

Abstract

This article is concerned with the role and effects of video on cultural technology in the Croatian diaspora in Australia in the light of the war in former Yugoslavia. It reveals the fragility of the cultural boundaries both of Australian multiculturalism and of the emerging postmodern culture of hybridity, which favour symbolic ethnicity as a form of ethnic identity. It also traces the gradual and often nervous formation and reinvention of Croatian cultural (diasporic) identity which has, with the inception of war, turned into fully fledged diasporic nationalism.     

Assessing symptoms of hypogonadism by self-administered questionnaire: qualitative findings in patients and controls

Background. Current screening instruments for hypogonadism lack adequate specificity and diagnostic accuracy. A new self-administered questionnaire of hypogonadism symptoms is being developed to address this need. The process for questionnaire development and results from the first (qualitative) phase are presented.

Methods. Qualitative interviews were conducted based on a new conceptual model of hypogonadism and according to standards for questionnaire development. An item pool was generated from focus groups and in-depth interviews with two groups of hypogonadal patients, treated (N = 26) and untreated (N = 26), and age-equivalent controls (N = 28). Standardized scoring of the qualitative interviews was used to confirm conceptual domains in the model and to generate questionnaire items for further validation.

Results. Key domains identified in both patients and controls included: (a) physical function; (b) bodily signs and symptoms; (c) sexual function and libido; (d) sleep function; (e) mood and affective function; (f) memory and cognitive function. The final domain is distress or bother associated with hypogonadism symptoms. This domain was only relevant to the patient groups.

Conclusions. The first stage in the design of a new hypogonadism screener has been completed. Seven domains were identified and draft items were developed in each domain according to current standards of patient-reported outcomes.     

“互联网+”时代出版营销模式探析

“互联网+”时代,互联网技术尤其是移动互联网技术的突飞猛进,为出版业注入了新的活力。出版营销与互联网技术的创造性结合,使出版业迎来了新的发展机遇。本文在总结出版营销领域现有的电子商务平台营销、社群营销、网络直播营销以及短视频营销四种主要营销模式的基础上,针对现有营销模式存在的问题,提出了一些展望与对策,旨在为出版营销的良性发展提供可行性建议。     

Manipulations of the Features of Standard Video Lottery Terminal (VLT) Games: Effects in Pathological and Non-Pathological Gamblers

The present study was conducted to identify game parameters that would reduce the risk of abuse of video lottery terminals (VLTs) by pathological gamblers, while exerting minimal effects on the behavior of non-pathological gamblers. Three manipulations of standard VLT game features were explored. Participants were exposed to: a counter which displayed a running total of money spent; a VLT spinning reels game where participants could no longer stop the reels by touching the screen; and sensory feature manipulations. In control conditions, participants were exposed to standard settings for either a spinning reels or a video poker game. Dependent variables were self-ratings of reactions to each set of parameters. A set of 2(3) × 2 × 2 (game manipulation [experimental condition(s) vs. control condition] × game [spinning reels vs. video poker] × gambler status [pathological vs. non-pathological]) repeated measures ANOVAs were conducted on all dependent variables. The findings suggest that the sensory manipulations (i.e., fast speed/sound or slow speed/no sound manipulations) produced the most robust reaction differences. Before advocating harm reduction policies such as lowering sensory features of VLT games to reduce potential harm to pathological gamblers, it is important to replicate findings in a more naturalistic setting, such as a real bar.     

视频平台用户生成内容投资和定价决策

平台管理者需要在考虑双边网络外部性的条件下对两边用户进行定价决策,除此之外投资策略也愈显重要。文章以视频平台为对象,用博弈模型研究视频平台在两边定价和 UGC (用户生成内容) 投资策略上的利益权衡。不同的内容来源具有不同的属性,UGC 内容相对于版权视频对广告商的吸引力不同,从而影响平台的投资策略。考虑了 3 种情况: 垄断、广告商多归属的寡头竞争以及广告商单归属的寡头竞争。研究提供了不同情况下视频平台的定价和UGC投资的决策指导,并比较了与传统市场的视角下决策的不同之处。结论显示不同的竞争条件下平台对于用户定价和 UGC 内容的投资策略如何受到 UGC 内容的特性以及平台间差异性的影响。