Effect of Types and Orders of Electromagnetic Field Finite Element Meshes on Power Communication Harmonic Parameters Calculation Results of Tubular Hydrogenerators

In generator design field,waveform total harmonic distortion(THD)and telephone harmonic factor(THF)are parameters commonly used to measure the impact of generator no-load voltage harmonics on the power communication quality.Tubular hydrogenerators are considered the optimal generator for exploiting low-head,high-flow hydro resources,and they have seen increasingly widespread application in China's power systems recent years.However,owing to the compact and constrained internal space of such generators,their internal magnetic-field harmonics are pronounced.Therefore,accurate calculation of their THD and THF is crucial during the analysis and design stages to ensure the quality of power communication.Especially in the electromagnetic field finite element modeling analysis of such generators,the type and order of the finite element meshes may have a significant impact on the THD and THF calculation results,which warrants in-depth research.To address this,this study takes a real 34 MW large tubular hydrogenerator as an example,and establishes its electromagnetic field finite element model under no-load conditions.Two types of meshes,five mesh densities,and two mesh orders are analyzed to reveal the effect of electromagnetic field finite element mesh types and orders on the calculation results of THD and THF for such generators.

Innovative Practice of Intelligent Business Models in the Field of Communication

As a service format to meet spiritual needs, fashion culture industry is often synchronized in its creation, production, dissemination, display and consumption. In order to explore how artificial intelligence provides technical means, platforms, channels and space for intelligent formats in the field of communication, and how to provide intelligent services for cultural creation, communication, display and consumption. This paper discusses the application and innovation of artificial intelligence in all aspects of communication field, analyzes the problems and puts forward corresponding countermeasures and suggestions.

基于中国剩余定理的NFC安全认证算法

针对近场通信技术在应用中出现的安全隐患问题,给出一种基于中国剩余定理的算法。算法利用中国剩余定理实现对传送信息进行加密,中国剩余定理基于数学中大素数分解难题,使得攻击者无法进行破解;所有信息加密过程中混入随机数,用于保证消息的新鲜性;算法在进行信息更新时采用伪随机函数计算,因伪随机函数具备的单向性,使得攻击者无法分析出有用隐私信息。将不同算法对比安全分析,表明该算法能够抵抗重放攻击、异步攻击等多种攻击。通过性能角度及仿真实验对多个算法进行分析,结果表明该算法计算时间复杂度低于其他算法。

基于NFC的配电网分布式无功控制系统设计

文章详细探讨基于近场通信(Near Field Communication,NFC)的配电网分布式无功控制系统的设计与实现,包括系统的架构设计、NFC技术的集成方式、实时数据采集与传输技术以及无功控制的算法和逻辑。同时,文章涵盖系统的测试方法和性能评估,旨在展示NFC技术如何在确保配电网稳定性和提升能效方面发挥关键作用。通过对这一创新系统设计的综合分析,为配电网的无功功率管理提供一种新颖的技术途径,有望为未来电网智能化升级提供理论与实践参考。

基于NFC的智能电网输电线路在线监测系统设计

智能电网技术的发展与实施是现代电力系统持续进步的关键因素之一,其中输电线路的实时在线监测对于确保电力供应的稳定性和安全性至关重要。近场通信(Near Field Communication,NFC)技术可以实现低成本、低功耗的数据收集与传输,从而辅助输电线路实现实时状态监测和故障预警。文章设计一种基于NFC技术的智能电网输电线路在线监测系统,涵盖系统的设计与架构、NFC模块的集成与配置、数据预处理和清洗技术以及故障检测与预警机制的开发。通过实际系统测试,验证了设计系统的有效性和实用性。

基于NFC技术的工程消防设备配电线路选用方法

文章针对传统消防设备配电线路选用方法效率低和准确性差等问题,提出一种基于近场通信(Near Field Communication,NFC)技术的智能化解决方案。该方法利用NFC技术实现设备信息的自动采集和数字化管理,结合FireLine软件对线路方案进行智能分析与多目标优化,并通过实验检验其性能。实验结果表明,该方法可有效提升配电线路设计的效率和可靠性。

基于NFC的智能输配电设备通信控制系统

针对智能输配电设备通信控制中存在的技术挑战,设计一套基于近场通信(Near Field Communication,NFC)的智能输配电设备通信控制系统。系统集成NFC读写器、多参数传感器、数据处理与控制中心等模块,实现设备的精准状态监测与智能故障诊断。实验结果表明,该系统具有接口简单通用、抗干扰能力强、多点快速识别等优势,能够为智能电网的可靠运行提供有力支撑。

基于NFC通信的超高压电力系统变电运维安全管理系统

文章针对超高压变电运维中存在的人员管控、设备巡检、资产盘点等问题,提出一种基于近场通信(Near Field Communication,NFC)技术的智能安全管理系统。该系统采用NFC员工卡实现可信身份认证与权限管控,同时引入多传感器数据融合和智能算法,实现设备状态的实时监测和异常告警。

基于NFC技术的特高压变电运行安全管理系统

文章针对特高压变电站的运行安全管理需求,提出一种基于近场通信(Near Field Communication,NFC)技术的创新解决方案。通过在关键设备上部署NFC标签,利用NFC读写器实现数据采集和状态监测,并结合大数据分析和机器学习算法,构建了一套集实时监控、故障诊断、安全预警等功能于一体的智能管理系统。仿真实验结果表明,该系统能够有效提高数据采集率、异常检测率及诊断准确率,缩短响应时间,为保障特高压变电站的安全运行提供可靠的技术支撑。

Quantum communication and entanglement between two distant atoms via vacuum fields

This paper proposes an efficient scheme for quantum communication between two atoms trapped in distant cavities which are connected by an optical fibre. During the operation, all the atomic system, the cavity modes and the fibre are not excited. The quantum state is mediated by the vacuum fields. The idea can be used to realize quantum entanglement between two distant atoms via vacuum.

基于NFC的低能耗温湿度记录系统的设计与实现

针对现有温湿度监测系统存在成本和能耗偏高等问题,设计一款低能耗的温湿度记录系统。该系统基于近场通信(NearFieldCommunication,NFC)和温湿度传感等技术,硬件部分主要由温湿度传感器模块、NFC标签模块、实时时钟(Real Time Clock,RTC)模块以及主控制芯片组成。各模块由锂电池供电,系统提供有效的充电管理,主控制芯片通过输入输出(Input Output,IO)口输出电流给NFC标签等模块供电,以降低能耗。同时,为了方便查阅温湿度记录,设计基于NFC通信的App,可以使用智能手机等便利的移动终端读取温湿度数据,从而实现低成本记录、传输、监测数据。

Research on the Development of 5G Wireless Communication in the Industrial Field

The development of science and technology is the key to changing human life and promoting social and economic development.As a product of technological development,the widespread application of communication technology has brought a brand new“dawn”to the development of human society.5G wireless communication technology is an advanced wireless communication technology that has recently developed.With the advantages of low energy consumption and high network speed,5G technology has shown very bright development prospects in various fields today.Government,operators and equipment providers are actively promoting and deploying 5G technology,and all links in the industry chain are mature.It is expected that the future market size will reach 17 trillion,especially in today’s industrial field,the application of 5G technology will further enhance work efficiency,ensure work quality,and promote good development in the industrial field.Based on this,this paper will study the development of 5G wireless technology in the industrial field,so as to provide corresponding reference for the good application of 5G technology in the industrial field.

Body area communication based on quasi-electrostatic field and spread spectrum

Based on the electrical model of body area communication, the change tendency of chan nel gain in 100 kHz 10 MHz band was experimentally analyzed and verified. Results show that chan nel gain was flat and signal attenuation was approximately 43 dB in 1 MHz 10 MHz band. The char acteristics of the channel were taken into account in the design of body area spread spectrum com munication and its multiuser receiver issue. BER Eb/No curves of single user and multiuser were de rived by simulation. The characteristics of body area commutation channel were studied and the fea sibility of introducing spread spectrum theory to body area communication was verified.

Sustainable Growth in China’s Communications Field: Trend Analysis of Impact of China’s Academic Publications

China＇s cormaaunications industry is an important part of the electronic information industry, and plays a significant role in the national informatization process. In 2006, China issued its National Plans for Medium and Long-term Development of Science and Technology （2006-2020） （NPMLDST）. Since 2006, there has been a rapid increase in the number of citations of China＇s interna- tional papers in the field of communications. In accordance with the goals listed in the NPMLDST, China needs to over- take several competitors by 2020 to be among the top five countries in the field of natural science field. By comparing two Essential Science Indicators （ESI） （i.e., the total number of citations and the number of citations per paper） for China and other countries, China＇s annual growth rate is found to exceed that of other influential countries in the field of sci- ence and technology, and exhibits evident growth-type characteristics. Besides, our study also shows that the short- age of high-quality academic papers in China is the main obstacle to improving the impact of China＇s academic publications.

From Text to Field:Study on the Intercultural Communication of Music in Collection of Chinese Works and Translations by Matteo Ricci from the Perspective of Maritime Silk Road

In this paper,with Collection of Chinese Works by Matteo Ricci written by Zhu Weizheng and A summary Interpretation of Chinese literature of Matteo Ricci in Ming and Qing Dynasties written by Tang Kaijian as major research texts and historical basis,as well as intercultural communication as the major research method,the aesthetic adaptation of native music of traditional Chinese music,etiquette,sacrifice and religious customs under the description of Matteo Ricci is discussed and interpreted from the perspective of the spread of musical culture of the Maritime Silk Road,four stages of field investigation are planned,and related musical activities and local musical phenomena appearing in his literature have an on-site visit.In this way,the vital position and historical significance of Matteo Ricci’s cultural missionary activities in the music communication on the Maritime Silk Road are obtained.

用NFC技术快速建立蓝牙安全连接问题研究

利用NFC技术交换数据安全性高、便捷、功耗低等特点,提出使用NFC为蓝牙建立连接的两种方案,把NFC与蓝牙传输结合起来,避免传统蓝牙传输连接过程搜索设备、配对等繁杂操作,同时保证数据传输安全性,解决了蓝牙传输连接过程复杂、设备功耗大、传输安全性较差等问题。根据其中一种方案设计并实现了"NFC+蓝牙"数据传输系统,测试性能良好,总体性能优于传统蓝牙传输方式,结果表明采用该方案用于移动设备间数据传输具有较高可用性。

融合NFC的3G智能卡系统

针对NFC技术和3G智能卡技术的可融合性,提出一种多功能3G智能卡系统。介绍近场通信的连接和传输及3G智能卡,研究两者融合的方法。该系统以3G智能卡的USIM卡为载体,利用近场通信技术将非接触的应用功能应用在USIM卡上,给出融合系统模型和设计方案。分析结果表明,该系统具有较好的融合性。

智能终端设备低成本NFC天线设计方法

近场通信(Near Field Communication,NFC)系统通信频率为13.56 MHz,采用近场磁耦合方式进行信号传输,具有通信距离近、安全度高等特点,广泛应用在银联、公交、门禁等领域.随着NFC技术的发展,越来越多的智能终端设备中配备了NFC系统.由于NFC系统工作频率低,NFC天线面积较大,天线尺寸通常为30 mm×40 mm,而且配置磁性基板用于金属环境使用,这使NFC天线制造成本较高,不利于NFC系统应用.本文通过空间磁场分布理论计算,采用分布式磁性基板设计,大幅降低磁性基板使用面积,并通过NFC天线结构设计,提高天线磁场辐射性能.仿真与实验证明,该设计方法使NFC天线磁性基板使用面积下降约40%,且天线辐射能力增强.在提升天线性能的同时,有效降低天线成本.

应用于近场通信(NFC)系统中的软磁屏蔽材料

近距离无线通信技术的发展,对系统的安全性、稳定性提出了更高的要求。概述了近场通信(NFC)技术基本原理,分别从软磁屏蔽材料的作用、国内外研究状况、软磁材料表征方法以及NFC系统用软磁屏蔽材料的关键技术等方面,对这种材料进行了评述。文章还介绍了应用于甚高频段(UHF)NFC系统中的软磁材料研究状况。

基于Android平台的NFC技术的研究与实现

本文主要研究NFC近场通信的关键技术及基于Android平台的实现途径。首先对Android系统平台和短距离无线通信进行了介绍,列出了目前主流的短距离无线通信技术;然后对NFC关键技术进行研究分析,对NFC技术的发展现状和主要特征、NFC数据交换格式、NFC标签、NFC相关规范进行了总结;最后介绍了Android平台上NFC应用的开发步骤,并介绍了基于Android平台开发的NFC标签的管理系统,该系统能够实现对NFC标签的读取、写入、格式化和查询等基本功能;除此之外,该系统还实现了通过NFC标签进行手机模式切换的创新功能。