为提升船舶喷推进器双微控制单元(Microcontroller Unit,MCU)冗余系统通信与故障检测功能,提高喷水推进器控制系统的可靠性和稳定性。在RS232串口心跳检测的基础上,通过自定义控制器局域网(Controller Area Network,CAN)通信协议,对现有...为提升船舶喷推进器双微控制单元(Microcontroller Unit,MCU)冗余系统通信与故障检测功能,提高喷水推进器控制系统的可靠性和稳定性。在RS232串口心跳检测的基础上,通过自定义控制器局域网(Controller Area Network,CAN)通信协议,对现有CAN通信网络进行功能复用,提出一种基于CAN总线的双MCU冗余上位机监控检测机制。实验测试结果表明,上位机监控检测方法克服了传统故障检测方法仅针对MCU故障而忽视其外围通信故障的缺点,避免了“双主机现象”,提高了冗余控制系统故障检测的速度与精准度,可以保障双MCU冗余系统平稳、可靠运行。研究成果可为喷水推进器双MCU冗余系统故障检测方式提供一定参考。展开更多
微控制器(Microcontroller Unit,MCU)芯片以其高性能、多功能、可编程等优点被广泛应用于各种信号处理和嵌入式系统。MCU芯片测试是保证产品可靠性的重要手段之一,由于市场上的MCU芯片愈发多样化,如何实现高性能和复杂功能的高效测试是...微控制器(Microcontroller Unit,MCU)芯片以其高性能、多功能、可编程等优点被广泛应用于各种信号处理和嵌入式系统。MCU芯片测试是保证产品可靠性的重要手段之一,由于市场上的MCU芯片愈发多样化,如何实现高性能和复杂功能的高效测试是MCU芯片测试的难点。论文针对一款32位高性能MCU芯片,基于自动测试设备(Automatic Test Equipment,ATE)开展了MCU芯片在线测试技术研究,详细说明了MCU电性能测试系统的硬件电路设计方法和软件程序实现流程,实现了批量MCU芯片的产线测试,保障了MCU芯片的可靠性。展开更多
大规模视频会议系统所面对的用户数量较多,且在运行时存在资源分配不均、负载过高等问题。为解决这一问题,需运用多点控制单元(Multipoint Control Unit,MCU)资源池实现多点控制,确保资源得到合理分配,提升视频会议系统性能。文章主要...大规模视频会议系统所面对的用户数量较多,且在运行时存在资源分配不均、负载过高等问题。为解决这一问题,需运用多点控制单元(Multipoint Control Unit,MCU)资源池实现多点控制,确保资源得到合理分配,提升视频会议系统性能。文章主要从组织、权限、服务区、网守号码、备份路由、组网规划等方面对MCU资源池进行设计,并提出资源池在大规模视频会议系统中的实际应用,以提升系统扩展性,确保MCU资源池满足大规模视频会议的需求。展开更多
According to the World Health Organization,an estimated 58 million people worldwide are chronically infected with hepatitis C virus(HCV),yet only about 20%have been formally diagnosed.Traditional laboratory–based ant...According to the World Health Organization,an estimated 58 million people worldwide are chronically infected with hepatitis C virus(HCV),yet only about 20%have been formally diagnosed.Traditional laboratory–based antibody and RNA assays require infrastructure and trained personnel,limiting their uptake in resource-limited and hard-to-reach settings.The OraQuick HCV self-test(HCVST)is the first World Health Organization-prequalified HCVST,which delivers results in 20-40 min via an easy-to-use gum-swab format.Field evaluations report a sensitivity of about 97%–98%and a specificity of about 99%–100%that are comparable with those of blood-based lateral-flow assays(e.g.,Alere Truline,SD Bioline).Usability studies demonstrated an acceptability rate of over 90%and a correct self-test completion rate of over 85%in key populations.HCVST with the Ora-Quick HCVST kit provides a practical,evidence-based approach to closing diagnostic gaps,particularly among underserved or stigmatized populations.To maximize the public health impact,programs should integrate self-testing into national screening algorithms,ensure linkage to RNA confirmation and treatment,and consider economic and operational contexts.展开更多
文摘为提升船舶喷推进器双微控制单元(Microcontroller Unit,MCU)冗余系统通信与故障检测功能,提高喷水推进器控制系统的可靠性和稳定性。在RS232串口心跳检测的基础上,通过自定义控制器局域网(Controller Area Network,CAN)通信协议,对现有CAN通信网络进行功能复用,提出一种基于CAN总线的双MCU冗余上位机监控检测机制。实验测试结果表明,上位机监控检测方法克服了传统故障检测方法仅针对MCU故障而忽视其外围通信故障的缺点,避免了“双主机现象”,提高了冗余控制系统故障检测的速度与精准度,可以保障双MCU冗余系统平稳、可靠运行。研究成果可为喷水推进器双MCU冗余系统故障检测方式提供一定参考。
文摘微控制器(Microcontroller Unit,MCU)芯片以其高性能、多功能、可编程等优点被广泛应用于各种信号处理和嵌入式系统。MCU芯片测试是保证产品可靠性的重要手段之一,由于市场上的MCU芯片愈发多样化,如何实现高性能和复杂功能的高效测试是MCU芯片测试的难点。论文针对一款32位高性能MCU芯片,基于自动测试设备(Automatic Test Equipment,ATE)开展了MCU芯片在线测试技术研究,详细说明了MCU电性能测试系统的硬件电路设计方法和软件程序实现流程,实现了批量MCU芯片的产线测试,保障了MCU芯片的可靠性。
文摘大规模视频会议系统所面对的用户数量较多,且在运行时存在资源分配不均、负载过高等问题。为解决这一问题,需运用多点控制单元(Multipoint Control Unit,MCU)资源池实现多点控制,确保资源得到合理分配,提升视频会议系统性能。文章主要从组织、权限、服务区、网守号码、备份路由、组网规划等方面对MCU资源池进行设计,并提出资源池在大规模视频会议系统中的实际应用,以提升系统扩展性,确保MCU资源池满足大规模视频会议的需求。
文摘According to the World Health Organization,an estimated 58 million people worldwide are chronically infected with hepatitis C virus(HCV),yet only about 20%have been formally diagnosed.Traditional laboratory–based antibody and RNA assays require infrastructure and trained personnel,limiting their uptake in resource-limited and hard-to-reach settings.The OraQuick HCV self-test(HCVST)is the first World Health Organization-prequalified HCVST,which delivers results in 20-40 min via an easy-to-use gum-swab format.Field evaluations report a sensitivity of about 97%–98%and a specificity of about 99%–100%that are comparable with those of blood-based lateral-flow assays(e.g.,Alere Truline,SD Bioline).Usability studies demonstrated an acceptability rate of over 90%and a correct self-test completion rate of over 85%in key populations.HCVST with the Ora-Quick HCVST kit provides a practical,evidence-based approach to closing diagnostic gaps,particularly among underserved or stigmatized populations.To maximize the public health impact,programs should integrate self-testing into national screening algorithms,ensure linkage to RNA confirmation and treatment,and consider economic and operational contexts.
