An analysis of the uniformity of multi-fracture initiation based on downhole video imaging technology: A case study of Mahu tight conglomerate in Junggar Basin, NW China

To solve the problem that the production of Mahu conglomerate reservoir is not up to expectation after the multi-cluster plus temporary plugging fracturing technology is applied in horizontal wells, stages 2–6 in the test well MaHW6285 are selected to carry out erosion tests with different pumping parameters. The downhole video imaging technology is used to monitor the degree of perforations erosion, and then the fracture initiation and proppant distribution of each cluster are analyzed. The results showed that proppant entered 76.7% of the perforations. The proppant was mainly distributed in a few perforation clusters, and the amount of proppant entered in most of the clusters was limited. The proppant distribution in Stage 4 was relatively uniform, and the fracture initiation of each cluster in the stage is more uniform. The proppant distribution in stages 2, 3, 5, and 6 was significantly uneven, and the uniform degree of fracture initiation in each cluster is low. More than 70% of the proppant dose in the stage entered clusters near the heel end, so the addition of diverters did not promote the uniform initiation of hydraulic fractures. There was a positive correlation between the amount of proppant added and the degree of perforations erosion, and the degree of perforations erosion ranged from 15% to 352%, with an average value of 74.5%, which was far higher than the statistical results of shale reservoir tests in North America. The use of 180° phase perforation(horizontal direction) can reduce the “Phase Bias” of perforations erosion, promote uniform perforations erosion and fluid inflow. The research results provide the basis for optimizing the pumping procedure, reducing the perforation erosion and improving the success rate of diversion.

Safety Analysis of Riding at Intersection Entrance Using Video Recognition Technology

To study riding safety at intersection entrance,video recognition technology is used to build vehicle-bicycle conflict models based on the Bayesian method.It is analyzed the relationship among the width of nonmotorized lanes at the entrance lane of the intersection,the vehicle-bicycle soft isolation form of the entrance lane of intersection,the traffic volume of right-turning motor vehicles and straight-going non-motor vehicles,the speed of right-turning motor vehicles,and straight-going non-motor vehicles,and the conflict between right-turning motor vehicles and straight-going nonmotor vehicles.Due to the traditional statistical methods,to overcome the discreteness of vehicle-bicycle conflict data and the differences of influencing factors,the Bayesian random effect Poisson-log-normal model and random effect negative binomial regression model are established.The results show that the random effect Poisson-log-normal model is better than the negative binomial distribution of random effects;The width of non-motorized lanes,the form of vehicle-bicycle soft isolation,the traffic volume of right-turning motor vehicles,and the coefficients of straight traffic volume obey a normal distribution.Among them,the type of vehicle-bicycle soft isolation facilities and the vehicle-bicycle traffic volumes are significantly positively correlated with the number of vehicle-bicycle conflicts.The width of non-motorized lanes is significantly negatively correlated with the number of vehicle-bicycle conflicts.Peak periods and flat periods,the average speed of right-turning motor vehicles,and the average speed of straight-going non-motor vehicles have no significant influence on the number of vehicle-bicycle conflicts.

Progress of Internet Video Technology

In China, currently there are more than 100 million videos being watched everyday on the Internet. There are three kinds of Internet videos: video sharing, Video on Demand (VoD), and Peer-to-Peer (P2P) streaming media. Video sharing is based on browser/server mode, severing user generated content. VoD is based on client/server mode and needs to be paid for. P2P streaming media is based on P2P mode service for hot content. To address P2P traffic optimization and content regulation, China National Information Technology Standardization Technical Committee sets up P2P working group to make relevant standards.

Will Market-Oriented Reforms Propel Technology Progress?Empirical Evidence from China’s High-Tech Sectors

This paper aims to explore the effects of market-oriented reforms on industrial technology progress.Based on a theoretical analysis,we performed an empirical study with a marketization index and panel data of high-tech sectors in China.We found that market-oriented reforms had significantly propelled technology progress in China’s high-tech sectors,and the effects became more evident after China’s WTO entry.Market-oriented reforms induced technology progress by increasing capital allocation efficiency,R&D input,and technology diffusion.Among various aspects of market-oriented reforms,the institutional environment exerted the most significant effects,followed by the economy’s non-state sector,product market development,and factor market development;the government-market relationship index influenced technology’s progress the least.The effects are heterogeneous across sectors with different technology attributes and more significant for technology-intensive sectors.Our findings offer policy implications for China’s ongoing market-oriented reforms and policy design for technology progress in high-tech sectors.

Optimization and Performance Analysis of Intelligent Video AI Dynamic

In today’s information age,video data,as an important carrier of information,is growing explosively in terms of production volume.The quick and accurate extraction of useful information from massive video data has become a focus of research in the field of computer vision.AI dynamic recognition technology has become one of the key technologies to address this issue due to its powerful data processing capabilities and intelligent recognition functions.Based on this,this paper first elaborates on the development of intelligent video AI dynamic recognition technology,then proposes several optimization strategies for intelligent video AI dynamic recognition technology,and finally analyzes the performance of intelligent video AI dynamic recognition technology for reference.

General Manager Li Qing and His INSTEC Video Technology Corp.

In the early Beijing spring 1995, Mr. Li Qing, General Manager of the INSTEC Video Technology Corporation, received an invitation which asked him to attend the International Broadcasting and TV Exhibition held in Las Vegas in April. The exhibition is considered the "Olympic Exhibition" of broadcasting and TV technology and equipment, focusing on exhibiting new technology and equipment. Corporations in the sector around the world are proud

Spatial Pattern Evolution and Industrial Characteristics of Economic and Technological Development Zones and High-tech Industrial Zones in China

Economic and technological development zone and high-tech industrial zone are important types of development zone in China,and there are differences in their connotation and goal setting.In this paper,basic data of national and provincial economic and technological development zones and high-tech industrial zones in China were collected and arranged.Kernel density analysis and other GIS spatial analysis techniques were used to analyze the evolution laws of spatial patterns of economic and technological development zones and high-tech industrial zones in cities from 2006 to 2018.First,the agglomeration intensity was compared by measuring the degree of regional agglomeration and dispersion on the two time nodes.Next,kernel density method was used to explore the evolution of the two in the spatial layout and location,and analyze development commonness and difference of economic and technological development zones and high-tech industrial zones.Finally,the trend and reason of spatial evolution of development zones with different leading industries were explored.Research results show that:①the agglomeration degree of layout of high-tech industrial zones is stronger than that of economic and technological development zones,and there are similarities and differences in distribution trend of spatial patterns of the two types of development zones;②the distribution of labor-intensive,capital-intensive and technology-intensive development zones is concentrated at smaller scales and dispersed at larger ones;③although there are differences between the economic and technological development zones and the high-tech industrial zones in the goal,support,structure and function,management system and so on,their spatial development presents a trend of convergence.In the future,when enhancing urban-rural planning and public administration,governments should combine the trend of industrial transformation and upgrading,and optimize spatial layout of development zones by adjusting industrial structure,layout,transportation and land use.

Application Advantages of Staring Area Imaging Technology(SAIT) for Microsatellites

The Staring Area Imaging Technology(SAIT) satellite continuously "images" the target over a certain time range, and can realize continuous imaging and multi-angle imaging of the area of interest. It has the characteristics of flexible imaging parameter setting and fast image preprocessing speed, enabling dynamic target detection and tracking, super-resolution, surface 3 D model construction, night-time imaging and many other application tasks. Based on the technical characteristics of the SAIT satellite, this paper analyzes the challenges in satellite development and data processing, focuses on the quasi-realtime application of SAIT satellite data, and looks at the development trend of the SAIT satellite.

Guest Editorial:Intelligent Video Surveillance and Related Technologies

Due to the increasing demand for developing a secure and smart living environment, the intelligent video surveillance technology has attracted considerable attention. Building an automatic, reliable, secure, and intelligent video surveillance system has spawned large research projects and triggered many popular research topics in several international conferences and workshops recently. This special issue of Journal of ElecWonic Science and Technology （JEST） aims to present recent advances in video surveillance systems which address the observation of people in an environment, leading to a real-time description of their actions and interactions.

基于智能3D视频教学模式在骨外科学实践教学的应用研究

目的:探索和评价基于智能3D视频教学模式下骨外科学临床实践教学模式的理论基础及应用效果。方法:以右江民族医学院临床2015级1~5班248名实习本科生为试验组,以同年级6~10班242名实习临床本科生为对照组,试验组采用智能3D视频教学授课模式进行临床实践教学,对照组采用常规多媒体教学+模拟手术教学模式;通过同一套试题进行理论考试、技能考核和问卷调查对比两组学生的理论考核成绩、临床思维和实践能力考核和课堂满意度测评的差异,探索和评估两种教学模式在骨科实践教学的应用效果。结果:试验组明显优于对照组,差异比较有统计学意义(P<0.05)。结论:基于智能3D视频教学模式对于提高学生理解和实际临床技能有较好的实践效果,在骨科临床实践教学具有较好的应用前景。

保偏光纤制备及其参数测试原理

为了研制工作波长为1310 nm的保偏光纤,采用改进的化学气相沉积工艺制备了保偏光纤预制捧和应力棒,经加工、拼接、清洗、拉丝工艺后,得到几何尺寸精确的高质量保偏光纤;同时搭建了高效测试系统,采用折射近场法、远场扫描法、视频灰度技术(传输近场),分别测量了预制棒的折射率分布和几何尺寸,保偏光纤模场直径、数值孔径、几何尺寸等关键参数。结果表明,此标准化测试系统操作流程简单、结果精确;模场直径为6.26μm,数值孔径为0.23,包涂直径80μm/135μm/165μm(精度±0.7μm);终检测试合格的光纤成品随机抽样16.25%,高低温老化实验后拍长、串音变化小。所研制的保偏光纤性能稳定,几何尺寸精确、结构均匀、损耗低,具有优良保偏性能,已广泛应用于实际生产中。

视频侦查技术关键及其发展展望

视频侦查技术的核心是通过视频图像的提取、查看、分析和研判来获取侦查线索、固定涉案证据。多年来经过在实战应用中不断地发展创新,视频侦查技术形成了自己独特的关键技术体系:视频信息分析解读技术是侦查应用和证据固定的基础和核心;视频证据固定保全技术的规范是审判中心主义的客观要求,可以获取视频侦查记录报告、视频检验鉴定报告或视频数据关联报告;低质量视频图像的增强恢复技术专业性强,应用范围窄,技术成熟度高,然而它不断面临新的挑战。目前,视频数据的智能应用在大数据背景下变得越来越重要,仍需进一步突破视频自动识别技术的应用范畴,建立完善多层次的视频数据综合应用体系,打造适应不同业务需要的视频数据实战应用模型。

AI大模型驱动下的教学短视频开发与实践

随着人工智能(Artificial Intelligence,AI)技术的飞速发展,AI大模型已成为教育创新的重要驱动力。深入剖析AI大模型的内涵与特点,探讨AI大模型驱动下开发教学短视频应遵循的基本原则,系统地阐述利用AI大模型精准生成教学短视频的策略和方法,以期提升教学短视频的制作品质与效率,加速推进教育资源智能化开发与精细化开发水平。

基于OBE理念的专业课程信息化建设与实践

在现有企业现场实践的基础上,对工程类专业课程开展信息化建设,利用企业生产视频进行教学,弥补现场实习实践时间紧张、难以反复学习、部分实践内容不够深入等问题,促进学生对生产实际的了解,同时进行劳动教育,传授劳动知识,培养劳动意识。通过在线课程平台,关注学习效果的形成性评价,秉持OBE理念,真正做到成果导向教育,促进学生毕业要求的达成以及相关能力的有效获得,为同类课程信息化教学改革提供实际案例。

基于毫米波通信技术的超高清视频传输方法研究

为了提高对超高清视频传输能力,提出基于毫米波通信的超高清视频传输方法。采用多频调制通信组网技术构建超高清视频传输的信道模型,建立超高清视频毫米波通信传输的自适应图像信息交互和采集模型;结合Lyapunov指数谱密度特征分析,实现谱特征分解和信道均衡模型构建;建立视频传输的视景转换和高阶谱特征提取模型;采用毫米波通信技术,实现滤波补偿和反馈增益调节;采用联合自相关的统计特征分析方法,得到动态均衡迭代函数,通过复杂信道环境下的抗干扰抑制和均衡调度,实现对超高清视频的无损传输和编码解码。实验结果表明,该方法进行超高清视频传输的误码率较低,平均为0.058 2,传输时延较低,平均为248.4 ms,峰值信噪比为49 dB。

公安院校视频侦查技术实验教学改革与实践探索

随着公安信息化进程的快速推进,视频侦查技术已经成为公安机关打、防、管、控的重要手段,这对公安教育工作提出了新挑战。视频侦查技术注重实操能力的培养,这给该课程的实验教学提出了更高要求,开展视频侦查技术实验教学改革,使其更贴近需求、贴近基层、贴近实战,具有重大意义。因此,依据学生培养目标和知识背景有针对性地开展实验教学可以提高人才培养质量,符合国家政策导向。本文立足公安院校的专业特色,以侦查学和刑事科学技术为例,开展视频侦查技术实验教学改革与创新探索,依据公安实战部门对视频侦查专业人才的具体需求,对分属不同一级学科的侦查学和刑事科学技术专业本科生实验教学进行实验教学设计,通过分析专业背景和培养目标差异,结合行之有效的实验教学方法,有针对性地开展实验教学方案设计,并在实际教学运行中进行实践探索。结果表明,本文开展的实验教学改革方案在7项教学评价中均得到了较好的反馈,实现了视频侦查技术专业人才培养的改革创新,也为其他公安院校开启了新的教学改革思路。

基于ELM-UTAUT模型的阅读推广类短视频采纳行为研究

在推进全民阅读的背景下,短视频已成为阅读推广的重要形式之一。阅读推广类短视频的传播效果取决于受众的采纳行为,因此本文以ELM和UTAUT为理论框架构建了阅读推广类短视频受众采纳行为影响因素模型,并通过问卷调查的方式进行实证研究,研究得出有用性、信源可信度和社会影响是影响受众采纳意愿的重要因素,而采纳意愿又会对采纳行为产生正向影响。同时,文章在研究结果的基础上提出阅读推广类短视频的优化策略。

生殖医学教学视频的拍摄与应用

随着辅助生殖技术的发展、三孩政策开放及人口出生率的下降,生殖中心在全国各大医院中发挥着越来越重要的作用。然而,目前无论是临床医学生还是广大的不孕症患者对生殖医学相关知识的了解依旧是凤毛麟角。一方面,生殖医学的知识在五年制甚至八年制的医学教材中的占比很小,学生们通过课本的知识只能了解到生殖领域中的冰山一角。另一方面,随着不孕症患者的上涨,亟须向他们科普更多的生殖医学相关知识。文章从辅助生殖技术的相关视频拍摄及其应用两方面进行详细阐述,借此将辅助生殖技术更好地展现在临床医学生们及不孕症患者面前,增加医学生对生殖医学专业的兴趣,以培养更多的医学人才、解决不孕这个社会难题,同时让非生殖医学专业的医师们加强生育力保护的理念。

基于云技术的高速公路视频监控系统研究与设计

国内道路交通行业发展迅速,高速公路出行需求持续增加,现有高速公路视频监控系统承载巨大的压力,难以实现视频监控系统的全联网和深入应用。因此,该研究通过云平台技术,设计并开发一套基于云平台的高速公路视频监控系统,通过接入各路段监控摄像头资源,并将各路段的监控数据实时上传至云平台,以开展相关业务。以此平台系统为基础,逐渐实现高速公路视频监控资源的统一接入和管理,使高速公路视频监控系统发挥“海量融合、自动识别、应急分析、智能管控”等功能。