Edge-Coordinated Energy-Efficient Video Analytics for Digital Twin in 6G

Camera networks are essential to constructing fast and accurate mapping between virtual and physical space for digital twin.In this paper,with the aim of developing energy-efficient digital twin in 6G,we investigate real-time video analytics based on cameras mounted on mobile devices with edge coordination.This problem is challenging because 1)mobile devices are with limited battery life and lightweight computation capability,and 2)the captured video frames of mobile devices are continuous changing,which makes the corresponding tasks arrival uncertain.To achieve energy-efficient video analytics in digital twin,by taking energy consumption,analytics accuracy,and latency into consideration,we formulate a deep reinforcement learning based mobile device and edge coordination video analytics framework,which can utilized digital twin models to achieve joint offloading decision and configuration selection.The edge nodes help to collect the information on network topology and task arrival.Extensive simulation results demonstrate that our proposed framework outperforms the benchmarks on accuracy improvement and energy and latency reduction.

Digital single-operator video cholangioscopy improves endoscopic management in patients with primary sclerosing cholangitis-a retrospective observational study

BACKGROUND Patients with primary sclerosing cholangitis(PSC)are at a high risk of developing cholestatic liver disease and biliary cancer,and endoscopy is crucial for the complex management of these patients.AIM To clarify the utility of recently introduced digital single-operator video cholangioscopy(SOVC)for the endoscopic management of PSC patients.METHODS In this observational study,all patients with a history of PSC and in whom digital SOVC(using the SpyGlass DS System)was performed between 2015 and 2019 were included and retrospectively analysed.Examinations were performed at a tertiary referral centre in Germany.In total,46 SOVCs performed in 38 patients with a history of PSC were identified.The primary endpoint was the evaluation of dominant biliary strictures using digital SOVC,and the secondary endpoints were the performance of selective guidewire passage across biliary strictures and the diagnosis and treatment of biliary stone disease in PSC patients.RESULTS The 22 of 38 patients had a dominant biliary stricture(57.9%).In 4 of these 22 patients,a cholangiocellular carcinoma was diagnosed within the stricture(18.2%).Diagnostic evaluation of dominant biliary strictures using optical signs showed a sensitivity of 75%and a specificity of 94.4%to detect malignant strictures,whereas SOVC-guided biopsies to gain tissue for histopathological analysis showed a sensitivity of 50%and a specificity of 100%.In 13%of examinations,SOVC was helpful for guidewire passage across biliary strictures that could not be passed by conventional methods(technical success rate 100%).Biliary stone disease was observed in 17.4%of examinations;of these,in 37.5%of examinations,biliary stones could only be visualized by SOVC and not by standard fluoroscopy.Biliary stone treatment was successful in all cases(100%);25%required SOVC-assisted electrohydraulic lithotripsy.Complications,such as postinterventional cholangitis and pancreatitis,occurred in 13%of examinations;however,no procedure-associated mortality occurred.CONCLUSION Digital SOVC is effective and safe for the endoscopic management of PSC patients and may be regularly considered an additive tool for the complex endoscopic management of these patients.

Real-time Video Encoder of Digital HDTV

On the basis of considering the present condition of China and referring the methods of the West, a real time video encoder of digital HDTV based on the MPEG 2 Standard is developed. In this paper, the division and the realization of every function unit of HDTV are discussed, and the test results of this system are given.

A Novel Video Data-Source Authentication Model Based on Digital Watermarking and MAC in Multicast

A novel video data authentication model based on digital video watermarking and MAC （message authentication code） in multicast protocol is proposed in this paper, The digital watermarking which composes of the MAC of the significant vid eo content, the key and instant authentication data is embedded into the insignificant video component by the MLUT （modified look-up table） video watermarking technology. We explain a method that does not require storage of each data packet for a time, thus making receiver not vulnerable to DOS （denial of service） attack. So the video packets can be authenticated instantly without large volume buffer in the receivers. TESLA （timed efficient stream loss tolerant authentication） does not explain how to select the suitable value for d, which is an important parameter in multicast source authentication. So we give a method to calculate the key disclosure delay （number of intervals）. Simulation results show that the proposed algorithms improve the performance of data source authentication in multicast.

Video Games and School Performances of Dakar High School Students

The triptych (Smartphones, Video games, adolescents) has imposed itself on the collective consciousness in the form of questioning to the point of becoming a social phenomenon. It thus raises concerns about the uses that adolescents make of it and the effects on their academic performance, which we proposed to study among middle school students from the Dakar academy inspection. Where appropriate, we used mixed methods with the collection techniques of questionnaire survey, semi-structured interviews respectively with middle school students, adults (parents, supervisors, teachers, etc.), participant observation and literature review. Concretely, before accessibility to video games, the middle school students were more idle and well-behaved, watched a lot of TV, played with their brothers and sisters or did household chores. The majority of young people had good, very good or excellent conduct and their averages were fair, fairly good or good. With access to a diverse digital environment, middle school students have passionately turned to video games. As a result, their learning time, concentration and submission to parental injunctions have declined significantly. This situation negatively affected their academic performance and encouraged bad behavior.

Correction of Inertial Navigation System’s Errors by the Help of Video-Based Navigator Based on Digital Terrarium Map

This paper deals with the error analysis of a novel navigation algorithm that uses as input the sequence of images acquired from a moving camera and a Digital Terrain (or Elevation) Map (DTM/DEM). More specifically, it has been shown that the optical flow derived from two consecutive camera frames can be used in combination with a DTM to estimate the position, orientation and ego-motion parameters of the moving camera. As opposed to previous works, the proposed approach does not require an intermediate explicit reconstruction of the 3D world. In the present work the sensitivity of the algorithm outlined above is studied. The main sources for errors are identified to be the optical-flow evaluation and computation, the quality of the information about the terrain, the structure of the observed terrain and the trajectory of the camera. By assuming appropriate characterization of these error sources, a closed form expression for the uncertainty of the pose and motion of the camera is first developed and then the influence of these factors is confirmed using extensive numerical simulations. The main conclusion of this paper is to establish that the proposed navigation algorithm generates accurate estimates for reasonable scenarios and error sources, and thus can be effectively used as part of a navigation system of autonomous vehicles.

DIGITAL-S设备的实际应用初探

概括介绍了ＤＩＧＩＴＡＬ－Ｓ设备的主要特点，较详细地总结了ＤＩＧＩ－ＴＡＬ－Ｓ设备的实际使用情况，探讨了将现有的数字设备和原有的模拟设备连接组成一套完整编辑系统的切实可行的方案。

An Efficient Method for Underwater Video Summarization and Object Detection Using YoLoV3

Currently,worldwide industries and communities are concerned with building,expanding,and exploring the assets and resources found in the oceans and seas.More precisely,to analyze a stock,archaeology,and surveillance,sev-eral cameras are installed underseas to collect videos.However,on the other hand,these large size videos require a lot of time and memory for their processing to extract relevant information.Hence,to automate this manual procedure of video assessment,an accurate and efficient automated system is a greater necessity.From this perspective,we intend to present a complete framework solution for the task of video summarization and object detection in underwater videos.We employed a perceived motion energy(PME)method tofirst extract the keyframes followed by an object detection model approach namely YoloV3 to perform object detection in underwater videos.The issues of blurriness and low contrast in underwater images are also taken into account in the presented approach by applying the image enhancement method.Furthermore,the suggested framework of underwater video summarization and object detection has been evaluated on a publicly available brackish dataset.It is observed that the proposed framework shows good performance and hence ultimately assists several marine researchers or scientists related to thefield of underwater archaeology,stock assessment,and surveillance.

New Fragile Watermarking Technique to Identify Inserted Video Objects Using H.264 and Color Features

The transmission of video content over a network raises various issues relating to copyright authenticity,ethics,legality,and privacy.The protection of copyrighted video content is a significant issue in the video industry,and it is essential to find effective solutions to prevent tampering and modification of digital video content during its transmission through digital media.However,there are stillmany unresolved challenges.This paper aims to address those challenges by proposing a new technique for detectingmoving objects in digital videos,which can help prove the credibility of video content by detecting any fake objects inserted by hackers.The proposed technique involves using two methods,the H.264 and the extraction color features methods,to embed and extract watermarks in video frames.The study tested the performance of the system against various attacks and found it to be robust.The evaluation was done using different metrics such as Peak-Signal-to-Noise Ratio(PSNR),Mean Squared Error(MSE),Structural Similarity Index Measure(SSIM),Bit Correction Ratio(BCR),and Normalized Correlation.The accuracy of identifying moving objects was high,ranging from 96.3%to 98.7%.The system was also able to embed a fragile watermark with a success rate of over 93.65%and had an average capacity of hiding of 78.67.The reconstructed video frames had high quality with a PSNR of at least 65.45 dB and SSIMof over 0.97,making them imperceptible to the human eye.The system also had an acceptable average time difference(T=1.227/s)compared with other state-of-the-art methods.

Paidia的消逝:从电子游戏商品透视当代消费-劳动的诱惑修辞

凯洛瓦将游戏置于Paidia-Ludus这一连续光谱中,并强调其中Paidia蕴含的自由与愉悦玩耍本能。而在电子游戏商品日趋普遍的现实里,凯洛瓦意义上的Paidia向度日趋消逝直至蜕化为诸如游戏化的修辞,并同时成为消费-劳动过程中的驱动话语:其一,电子游戏作为数字资本主义的理想商品,虽然声称以玩家的愉悦玩耍体验为目的,但是其消费设计却并非意在形成一个玩耍本能的释放空间,而是构成一个与玩耍本能有些许交错但本质在于使欲望增殖并将其变现的控制场域;其二,电子游戏商品因其具备双重“确定的可能性”,即其作为商品在被购买前所具备的确定的可能性与其作为电子游戏本身所具备的确定的可能性,成为无摩擦资本主义视域下的消费润滑剂,Paidia蕴含的自由与愉悦玩耍内涵在此蜕化为鲍德里亚意义上泛化的“娱乐道德”;其三,游戏化概念基于电子游戏商品普遍化的现实被抽象出来,并流行于营销、教育、培训等领域,不仅反过来重塑了一般消费品的营销逻辑,更为一种精巧的管理与组织技术作了掩护,无批判地接受这种游戏化修辞,反而削弱了Paidia向度下自由与愉悦的游戏所蕴含的创造性力量。

中国石油井下作业数字化监督发展问题与对策

阐述了中国石油井下作业数字化监督在监督人员数字化管理、施工队伍数字化监督、施工作业数字化监督、井场环境数字化监督4个方面的发展现状。分析了井下作业数字化监督发展面临数字化监督管理制度不健全、监督数据标准不统一、数字化智能监督技术不完善、缺少统一的数字化智能监督平台、监督数据价值挖掘不深入5个方面的主要问题。提出了制定井下作业数字化监督管理制度、建立井下作业监督数据标准、攻关数字化智能监督关键技术、研发井下作业数字化智能监督平台、提升监督大数据分析应用水平5项数字化监督发展对策。展望了井下作业数字化监督建设发展后在提升监督人员履职效率、降低监督人力资源成本、提升工程质量、保障施工安全与环保4个方面的预期成效。

基于视频的振动测量技术研究进展

振动测量是保障结构安全和良好状态的基本手段。高精度的振动测量可为结构设计、安装调试、健康管理等振动试验提供精确的输入与响应测试。相较于传统的振动测量手段,基于视频的振动测量技术将相机的全部像素转化为高精度振动传感器,利用视频图像方式让人们肉眼可视结构在物理世界的真实振动形态,具有非接触、全视场、高空间分辨率、灵活方便等优点,近年来受到业界的广泛关注。该文主要介绍了视频振动测量技术的系统构成与测量过程、当前主要方法和相关技术最新进展,并总结了视频振动测量技术与其他技术相比存在的优势。通过分析与对比,肯定了视频方法是解决振动测量问题的有效手段和对传统测量方法的有力补充,随着相关技术和硬件设备的发展,视频振动测量方法将具有越来越大的研究意义和应用价值。

人工智能在数字馆员视频荐书中的应用价值及未来展望

本文首先探讨了AI虚拟主播在图书推荐领域的现状,分析了其技术应用、用户接受度及市场趋势。接着深入剖析了视频荐书、AI赋能数字馆员视频荐书在阅读推广中的价值和优势,进一步展望了数字馆员视频荐书的发展空间,最后聚焦AI数字馆员视频荐书的问题、发展重点,提出了未来在技术创新、用户体验优化以及知识服务模式拓展等方面的创新思考,以期为图书馆服务创新提供理论支持和实践指导。

数字古籍视频中用户参与的组态效应

数字古籍视频实现了数字媒体技术与古籍的有效结合,探究数字古籍视频的用户参与行为,将有效助力古籍深层次保护,对推动古籍大众化传播和普及推广实践工作具有重要意义。以《典籍里的中国》第一季的26532条用户评论为研究对象,借鉴认知-情感人格系统理论,结合主题模型构建数字古籍视频用户参与行为的组态分析框架,并运用模糊集定性比较分析方法,以获取影响数字古籍视频用户参与行为的组态路径,从而归纳相应组态模式。研究发现,数字古籍视频的用户参与行为存在6条殊途同归的组态路径,且可进一步归纳为“情境-认知导向型”“综合导向型”和“情境-情感导向型”3种差异化的用户参与行为组态模式。在研究发现基础上,为数字古籍视频的内容生成及古籍保护单位优秀文化典籍的保护传承提出若干建议。

电子游戏长期保存研究:全球实践态势与挑战应对

文章采用网络调查法、案例研究法和内容分析法解析代表性案例,梳理电子游戏长期保存的全球实践现状,分析挑战与策略。电子游戏长期保存行动包括:制定保存范围、选择保存对象、采取保存手段和提供利用服务等;面临的挑战包括:保存需求和保存现状的差距、保存目标和保存手段的矛盾、保存权利和保存意愿的冲突;应对策略包括:将电子游戏纳入数字文化遗产框架,推进协同治理共建电子游戏元宇宙,实施电子游戏长期保存国家行动。

短视频应用能否延伸家庭能力?--来自CFPS的文化证据

基于2020年中国家庭追踪调查数据,实证检验户主短视频应用活跃程度对家庭资本的影响机理。研究发现,户主短视频应用活跃程度对家庭社会资本与经济资本产生显著的正向影响。在异质性影响方面,农村以家庭社会资本为主,城镇以家庭经济资本为主;在作用机制方面,通过政治信息传播对家庭资本产生正向影响。数字媒介是文化资本,能够通过向家庭资本转化延伸家庭能力,其文化资本属性揭示了“媒介是文化延伸”的本质。

从“流量”到“力量”:数字赋能边疆民族地区文旅振兴研究——基于50位文旅局长“变装”代言视频的扎根分析

丰富的文旅资源是边疆民族地区共同实现社会主义现代化的独特优势。随着文旅行业数字化转型步伐不断加快,科技与文旅融合发展成为新的行业趋势,为边疆民族地区文旅振兴提供新的发展机遇。近年来,文旅局长“变装”代言成为边疆民族地区文旅振兴网络推广的新路径,通过对50位边疆民族地区文旅局长的“变装”代言视频及网民对视频的评论进行扎根分析后发现,边疆民族地区文旅局长“变装”视频的流量密码在于政府部门的网络宣传的发力点与网民关注点的契合,为边疆民族地区文旅振兴赋能,但也存在网络影响难预料、线下市场难带动、社会效益难凸显等问题。要真正将线上视频“流量”转化为线下文旅振兴“力量”,还需要着重推进从线上宣传到线下服务的重心转变,加强数字化基础设施建设,规范线上市场监管,凸显社会政治效益。

AI虚拟数字人技术在汽车专业线上教学中的前沿实践

在人工智能、智能语音及虚拟成像等技术持续快速发展的背景下,职业院校传统教学模式难以跟上新产业和新经济的发展步伐。为强化学生理论知识,丰富课堂和线上教学资源,在传统职业教育的基础上,结合AI虚拟数字人技术提出了一种新的在线课程数字视频资源的制作方法。该文通过介绍数字人课件制作路径,讲述了一种将虚拟数字人技术应用于线上课程视频教学资源制作的方法。目的在于丰富教学资源,提升教师制作线上课程教学资源的效率和能力,对现有教与学的模式进行更新补充,培养符合现代科技背景新领域的专业技能人才。