本文介绍一种新颖的FMS监测方法,并依据作者所研制的MSF(Monitoring System of FMS)系统作详细的阐述。为促使FMS技术的发展,提高FMS的加工的柔性、人员和设备的柔性,作者突破传统的单项、单机监测和自行处理的方式,引入整体监测的思想,...本文介绍一种新颖的FMS监测方法,并依据作者所研制的MSF(Monitoring System of FMS)系统作详细的阐述。为促使FMS技术的发展,提高FMS的加工的柔性、人员和设备的柔性,作者突破传统的单项、单机监测和自行处理的方式,引入整体监测的思想,使MSF走向更实用的阶段。MSF系统是通过CRT来监测FMS的加工工况,通过开窗提示故障内容、系统特征图符闪烁和报警等方式来通告操作者所发生的故障类型,这为FMS监测走向整体监测和多种排碍处理探索了道路。展开更多
调频频段数字音频广播(Frequency Modulation-China Digital Radio,FM-CDR)是我国自主创新构建的数字广播技术体系,具备模数同播、频谱高效利用、高品质音频输出等核心优势。系统阐述FM-CDR技术的核心原理、整体系统结构及发射机关键模...调频频段数字音频广播(Frequency Modulation-China Digital Radio,FM-CDR)是我国自主创新构建的数字广播技术体系,具备模数同播、频谱高效利用、高品质音频输出等核心优势。系统阐述FM-CDR技术的核心原理、整体系统结构及发射机关键模块设计,结合文山电视调频骨干转播台高海拔特殊环境的工程改造案例,详细剖析信号源备份架构、发射机配置方案、天馈系统优化等具体实施细节,为行业内同类高山台站的数字化升级提供可借鉴的实践参考。展开更多
Understanding how aging influences the thermal hazards of lithium-ion batteries(LIBs)is critical for enhancing their safety across a wide range of applications.This study systematically investigates the thermal runawa...Understanding how aging influences the thermal hazards of lithium-ion batteries(LIBs)is critical for enhancing their safety across a wide range of applications.This study systematically investigates the thermal runaway(TR)behavior of LIBs,with particular emphasis on combined-pathway aging,evaluated in terms of normalized usable capacity(U_(E)).Key thermal safety parameters,i.e.,TR triggering temperature,mass loss,and heat generation under diverse aging conditions,are quantified.To enable a fair comparison,thermal hazards are evaluated based on equivalent usable capacity,revealing that aged cells exhibit lower TR triggering temperatures and higher heat generation than fresh cells under thermal abuse with elevated thermal risks.Mechanistic analysis identifies lithium plating,solid electrolyte interphase(SEI)formation,and lithium depletion,particularly under high-temperature charging,as the dominant contributors to increased hazard.Using an aging-stressor matrix,a trade-off between high-C-rateinduced thermal instability and high-temperature-induced thermal stability is discovered and quantified,underscoring the strong dependence of thermal hazards on specific aging pathways.This work advances the fundamental understanding of aging-induced safety risks in LIBs and offers practical guidance for the development of safer battery systems,optimized charging protocols,and improved battery management strategies across applications in electric vehicles,consumer electronics,and grid-scale energy storage.展开更多
文摘本文介绍一种新颖的FMS监测方法,并依据作者所研制的MSF(Monitoring System of FMS)系统作详细的阐述。为促使FMS技术的发展,提高FMS的加工的柔性、人员和设备的柔性,作者突破传统的单项、单机监测和自行处理的方式,引入整体监测的思想,使MSF走向更实用的阶段。MSF系统是通过CRT来监测FMS的加工工况,通过开窗提示故障内容、系统特征图符闪烁和报警等方式来通告操作者所发生的故障类型,这为FMS监测走向整体监测和多种排碍处理探索了道路。
文摘调频频段数字音频广播(Frequency Modulation-China Digital Radio,FM-CDR)是我国自主创新构建的数字广播技术体系,具备模数同播、频谱高效利用、高品质音频输出等核心优势。系统阐述FM-CDR技术的核心原理、整体系统结构及发射机关键模块设计,结合文山电视调频骨干转播台高海拔特殊环境的工程改造案例,详细剖析信号源备份架构、发射机配置方案、天馈系统优化等具体实施细节,为行业内同类高山台站的数字化升级提供可借鉴的实践参考。
文摘Understanding how aging influences the thermal hazards of lithium-ion batteries(LIBs)is critical for enhancing their safety across a wide range of applications.This study systematically investigates the thermal runaway(TR)behavior of LIBs,with particular emphasis on combined-pathway aging,evaluated in terms of normalized usable capacity(U_(E)).Key thermal safety parameters,i.e.,TR triggering temperature,mass loss,and heat generation under diverse aging conditions,are quantified.To enable a fair comparison,thermal hazards are evaluated based on equivalent usable capacity,revealing that aged cells exhibit lower TR triggering temperatures and higher heat generation than fresh cells under thermal abuse with elevated thermal risks.Mechanistic analysis identifies lithium plating,solid electrolyte interphase(SEI)formation,and lithium depletion,particularly under high-temperature charging,as the dominant contributors to increased hazard.Using an aging-stressor matrix,a trade-off between high-C-rateinduced thermal instability and high-temperature-induced thermal stability is discovered and quantified,underscoring the strong dependence of thermal hazards on specific aging pathways.This work advances the fundamental understanding of aging-induced safety risks in LIBs and offers practical guidance for the development of safer battery systems,optimized charging protocols,and improved battery management strategies across applications in electric vehicles,consumer electronics,and grid-scale energy storage.
