Video

摘要： Background:Public health guidelines have called for innovative and flexible physical activity(PA)intervention strategies to promote PA and health amid the coronavirus disease 2019(COVID-19)pandemic.Therefore,this study’s purpose was to examine the effects of a home-based,YouTube-delivered PA intervention grounded in self-determination theory on young adults’free-living PA,sedentary behavior,and sleep quality(NCT04499547).Methods:Sixty-four young adults(48 females;age=22.8±3.4 years,mean±SD;body mass index=23.1±2.6 kg/m^(2))were randomized(1:1)into the intervention group,which received weekly aerobic and muscle-strengthening PA videos,or control group,which received weekly general health education videos,for 12 weeks.Our primary outcome was free-living moderate-to-vigorous PA(MVPA)and our secondary outcomes were sedentary behavior,light PA,and sleep quality(measured using ActiGraph accelerometers)along with muscle-strengthening PA frequency,self-determination theory-related motivation(non-regulation,external regulation,introjected regulation,identified regulation,integrated regulation,and intrinsic regulation),and perceived PA barriers(assessed using validated questionnaires).Repeated measures analysis of variances(ANOVAs)examined between-group differences at an adjusted significance level of 0.004 and effect sizes as partial eta-squared(η;).Results:We observed statistically significant interaction effects for MVPA,sleep efficiency,muscle-strengthening PA frequency,non-regulation,integrated regulation,intrinsic regulation,and perceived PA barriers(F(1,62)=10.75-77.67,p<0.001-0.002,η_(p)^(2)=0.15-0.56)with all outcomes favoring the intervention group.We observed no statistically significant differences in either group for sedentary behavior,light PA,sleep duration,or external,introjected,and identified regulations after 12 weeks(F(1,62)=1.11-3.64,p=0.06-0.61).Conclusion:With national COVID-19 restrictions still in place and uncertainty regarding post-pandemic PA environments and behaviors,a remote,YouTube-delivered PA intervention may help foster clinically meaningful improvements in young adults’free-living MVPA,musclestrengthening PA frequency,sleep efficiency,PA-related intrinsic motivation,and perceived PA barriers.

摘要： 如何有效培养学生形成"看"技能已成为高中英语教学的一大热点。ARCS动机模型作为一种通过优化教学设计来激发、维持学生学习动机的模型,对于培养"看"技能的教学有着高度的利用价值。本文基于新人教版高中英语教材中的"Video Time"板块,将ARCS动机模型与"看前","看中","看后"三个教学环节结合起来,提出了相应的教学策略,旨在优化高中英语教师针对"看"技能培养的教学设计。

摘要： This paper examines dependencies of voice and video contents on human perception of group (or inter-destination) synchronization error in remote learning by Quality of Experience (QoE) assessment. In our assessment, we use two videos and three voices (two voices for one video and one voice for the other video). We also investigate influences of silence periods in the voices and temporal relations between the voices and videos (called the tightly-coupled and loosely-coupled contents here). The voices are spoken by a teacher according to the videos. Each subject as a student assesses the group synchronization quality by watching each lecture video and the corresponding explanation voice, and then the subject answers whether he/she perceives the group synchronization error or not. As a result, assessment results illustrate that silence periods mitigate the perception rate of the error, and we can also find that we can more easily perceive the error for tightly-coupled contents than loosely-coupled ones.

摘要： On June 1,2022,State Councilor and Foreign Minister Wang Yi delivered a video speech entitled"Strengthen Solidarity and Cooperation and Improve Global Govemance"to the China-Russia High-level Think Tank Forum.

摘要： The integration of theatre art with media such as video,the Internet and metaverse embodies intermediality and shows interactivity characteristics.Video is the first to open the possibility of interaction between performers and stage space in the theatre,thus greatly expanding the relationship between people and video in the links of environment,atmosphere,narrative,action and conflict,making stage performance more flexible and changeable.The rapid rise of computer technology represented by the Internet provides two interactive modes of node structure and natural language for digital theatre performance,opening the path for the audience to participate in theatre interaction.The metaverse media environment represented by video games and virtual reality has dramatically changed the freedom of audience participation in theatre.“Digital embodiment”enables the audience to immerse themselves in virtual theatre performance and become a part of theatre composition,thus bringing unprecedented performance experience.

摘要： BACKGROUND It remains unclear whether video aids can improve the quality of bystander cardiopulmonary resuscitation(CPR).AIM To summarize simulation-based studies aiming at improving bystander CPR associated with the quality of chest compression and time-related quality parameters.METHODS The systematic review was conducted according to the PRISMA guidelines.All relevant studies were searched through PubMed,EMBASE,Medline and Cochrane Library databases.The risk of bias was evaluated using the Cochrane collaboration tool.RESULTS A total of 259 studies were eligible for inclusion,and 6 randomised controlled trial studies were ultimately included.The results of meta-analysis indicated that video-assisted CPR(V-CPR)was significantly associated with the improved mean chest compression rate[OR=0.66(0.49-0.82),P<0.001],and the proportion of chest compression with correct hand positioning[OR=1.63(0.71-2.55),P<0.001].However,the difference in mean chest compression depth was not statistically significant[OR=0.18(-0.07-0.42),P=0.15],and V-CPR was not associated with the time to first chest compression compared to telecommunicator CPR[OR=-0.12(-0.88-0.63),P=0.75].CONCLUSION Video real-time guidance by the dispatcher can improve the quality of bystander CPR to a certain extent.However,the quality is still not ideal,and there is a lack of guidance caused by poor video signal or inadequate interaction.

摘要： Kenyan student masters the art of making Chinese tea and the culture behind itTea is a significant social phenomenon in China,with its history dating back to thousands of years. Tea is much more than a simple drink;it is also used in traditional Chinese medicine for its therapeutic attributes, which adds to its value. It is sipped as a drink but also used to flavor a variety of meals, from poached eggs and sorbet to fish. For foreigners residing in China.

摘要： STORIES FROM 2021 CHINA-AFRICA VIDEO AND PHOTO COMPETITION One of Kenya’s first female train drivers benefits from the construction of the Mombasa-Nairobi Standard Gauge Railway and Chinese know-how Concilia Owire, 28, grew up in a small village in west Kenya. Weighed down by cultural traditions and financial constraints, girls of her generation have often abandoned their career aspirations. But the opening of the Mombasa-Nairobi Standard Gauge Railway(SGR), built with Chinese support, has changed all that.

摘要： 近两年,受全球经济增速放缓和疫情黑天鹅的影响,全球广告营销市场对“效率”和“增长”的渴望达到了前所未有的顶峰面对生存的危机,媒体端、代理机构都在不断优化组织与业务结构,以融合化的团队和流程快速响应广告主的需求,同时加码数据与术能力,推出多元的数字化工具以实现自动化服务,以应对“效率”和“增长”的需求其中,以广告收入为生的谷歌,敏锐地捕捉到这一变化,先发制人,于2018年启动了Google Display&Video 360产品计划,实现旗下展示类、视频类营销资源的整合和联动表文从营销体系构建及协同的角度,对Google Display&Video 360进行了阐述。

摘要： Because of the rapid growth of head-mounted displays and 5G networking deployment,360-degree video has become increasingly popular.To generate the real experience of a virtual environment,360-degree videos require an ultrahigh resolution and frame rate to cover an omnidirectional view.These two prerequisites impose challenges for the transmission bandwidth and storage capacity of 360-degree video streaming.To reduce bandwidth and storage waste while providing a good immersive experience,we propose an optimized viewport-adaptive 360-degree video streaming method using high-efficiency video coding tiling,motion-constrained tile sets and MPEG dynamic adaptive streaming over HTTP spatial relationship description.The paper describes the rigorous design of the optimized system,which can assign different bitrates to different tiles in the viewport.The experimental results show that the proposed streaming system compares favourably with existing methods in terms of bitrate savings and storage capacity reduction.

摘要： 本发明公开了一种DVD‑VIDEO视频正片内容提取装置，包括视频源解析模块和视频源编码合成模块，视频源解析模块用于元数据提取并输出DVD内容至视频源编码合成模块，视频源编码合成模块用于解析合成DVD‑VIDEO源，这种DVD‑VIDEO视频正片内容提取装置，从DVD‑VIDEO的播放原理入手，采用正向分析的手法，可以有效地支持多角度DVD‑VIDEO视频源、不同DVD‑VIDEO视频源的合并，且可支持任意角度提取、任意字幕选择、任意音轨选择、自动菜单系统剥离、自动正片视频内容提取、电视剧集自动分离、多剧集自动合成等功能，极大地提高内容生产效率。

摘要： 一种Video‑SAR图像实时压缩重构方法，利用Robust‑PCA有效抑制Video‑SAR图像中的相干斑噪声，同时很好地保留了细节纹理特征。通过训练学习最优Wavelet包基字典，实现了对Video‑SAR图像很好的稀疏表征，从而减少了测量数，提高了重构精度，存储不同类型场景的稀疏基，进行稀释表征时直接调用，减少运算量。通过对Video‑SAR图像的关键帧和非关键帧帧差以不同的采样率进行低复杂度压缩编码，采用分布式压缩感知重构，可以满足实时传输的要求。使用Canny算子进行边缘检测，实现了对非关键帧进行Bregman迭代细解码，能够重构出细节丰富的高分辨率SAR图像。

摘要： 本发明公开了一种基于阴影Video‑SAR中感兴趣目标跟踪方法，它是通过建立了一个全新的网络——指导锚孪生网络，包括孪生子网络、指导锚子网络和相似性学习子网络三个部分，利用SAR图像动目标阴影灰度特性稳定、位置不发生偏移等优点，来实现基于阴影的Video‑SAR任意感兴趣运动目标跟踪；同时使用指导锚子网络(GA‑SubNet)来提升跟踪精度，抑制虚警，生成稀疏的更符合SAR动目标阴影形状的锚本发明在公知的桑迪亚国家实验室数据集上的跟踪精度为60.16％，跟踪速度为每秒32帧。与其他先进的Video‑SAR中动目标跟踪技术相比，本发明实现了很高的Video‑SAR中动目标跟踪精度。

摘要： 本发明公开了一种浏览器HTML5 Video标签音视频重定向的方法及系统，本发明浏览器HTML5 Video标签音视频重定向的方法包括在云虚拟机中的浏览器播放需重定向的目标视频的过程中，拦截浏览器中针对目标视频的音视频解码类输入的音视频数据，并将截获的音视频数据发送给云终端以用于通过云终端中的播放器进行解码播放输出。本发明能够有效降低云虚拟机浏览器播放视频的CPU占用率，也降低了云服务器压缩编码的CPU消耗，同时还解决了云桌面在浏览器播放视频时清晰度和流畅度降低的问题。

摘要： 本发明公开了一种基于Video Transformer的疲劳驾驶检测方法，包括以下步骤：从正常光照数据集中获取待测视频帧；通过MTCNN神经网络进行人脸图像提取；将提取出的人脸图像序列输入到Video Transformer中获取最终疲劳检测判定结果。本发明采用上述一种基于Video Transformer的疲劳驾驶检测方法，用于复杂光照环境下，通过MTCNN神经网络得到待测视频帧中的人脸图片，从而能够有效的提高检测精确率，针对待测人脸图像序列，使用Video Transformer作为判别器完成最终疲劳结果判定。

摘要： 本申请公开了一种网页视频Video控制栏显示方法及显示设备，用以在触发网页视频Video进入语音模式，并接收到通过语音控制设备输入的语音指令时，若进一步检测到当前模拟鼠标为进入网页的状态，按照周期生成在所述网页视频Video所在界面范围内的模拟鼠标移动HOVER_MOVE事件，以模拟鼠标在所述网页视频Video的界面上周期性地移动，由于网页中Video控制栏可以通过模拟鼠标时间触发，所以模拟鼠标周期性地移动时，可以触发Video控制栏在网页视频Video所在的界面范围内显示，以便用户在使用语音控制功能时，可以通过显示的控制栏直观了解网页视频支持的操作。

摘要： 本发明公开了一种video标签自定义UI样式的方法，通过设置Crosswalk内核中原生video标签UI样式的实现方式，扩展了一套video标签自定义UI样式的方法，并设置了使用原生video标签样式或自定义video标签样式的开关，满足用户自己设计video标签样式的需求。

摘要： 本发明提供一种通过rtsp视频流转flv格式实现h5网页端以video控件播放的方法，包括基于GitHub开源代码托管平台分别下载nginx代理服务器及nginx‑http‑flv‑module流媒体服务器，并重新编译nginx以集成nginx‑http‑flv‑module模块；暴露http开启转码接口动态获取rtsp取流地址；根据rtsp地址组装ffmpeg命令，且以API的方式通过dos磁盘操作系统执行推流操作，将rtsp取流数据推送至流媒体服务器，通过vlc或者flv.js进行播放。通过将rtsp协议数据直接转码为http‑flv，从而实现h5网页端通过flv.js直接用video控件就能播放实施方式，达到在Html页面无插件播放rtsp协议视频流的目的，解决现有技术中播放rtsp协议视频大多数都是通过安装第三方插件，以及现有浏览器内核不兼容多数插件的问题。

摘要： 本申请公开了一种视频video播放管理方法及显示设备，用以通过响应于打开指定标签页，解析指定标签页以获取指定标签页中存在的每一video元素，为每一video元素创建对应的video对象，并为每一video对象创建该video播放所需的video资源，从而在响应于将所述指定标签页切换到后台时，记录所述每一video对象对应的video当前的播放状态，释放所述每一video对象对应的video资源，以实现对指定标签页中video播放的管理，减少由于video播放占用资源过多导致浏览器卡顿的问题，并避免video播放占用的资源被直接释放导致的黑屏。

摘要： 本发明公开了一种基于video slice的视频类型分类方法，包括以下步骤：101)设定分类步骤、102)提取slice图像步骤、103)类别分类步骤、104)类别判定步骤；本发明提供性能提高至少100倍以上的一种基于video slice的视频类型分类方法。