Spinal cord injury(SCI),which results in severe neurological loss and multiple complications,remains a global health problem.Although SCI is a central nervous system injury,thefield of related therapies has shown grea...Spinal cord injury(SCI),which results in severe neurological loss and multiple complications,remains a global health problem.Although SCI is a central nervous system injury,thefield of related therapies has shown great promise,with breakthroughs regarding the theory of central nervous system irreparability.However,from the perspective of neuroprosthetics,the relevant basic theories are not always fully recognized or clearly understood,which poses a challenge to clinical practice guidance.Magnetic therapy technology has developed rapidly in recent years,and various magnetic therapy methods have emerged.Magneticfield therapy(MFT),with applications in SCI treatment,is considered a promising strategy for nerve repair and provides a theoretical foundation for subsequent research.MFT,including transcranial magnetic stimulation,static magneticfield,and pulsed electromagneticfield,has been used preclinically,and clinical studies have shown potential efficacy in SCI.Moreover,preclinical studies have revealed that MFT promotes nerve repair,reduces inflammatory responses,improves motor function,and enhances bladder control.They have also demonstrated that MFT is safe in human SCI patients and may improve motor function and pain control.However,its translation from preclinical studies to clinical application faces many challenges,including biological differences,determination of dose and treatment parameters,assessment of safety and side effects,and ethical and regulatory compliance.The present article aims to provide a comprehensive review of the applications and advances of MFT in SCI,to guide future research and provide a reference for clinical treatment.An in-depth discussion of MFT in thefield of SCI may provide new ideas and directions for neural repair in SCI.展开更多
漏磁效应对永磁饱和型故障限流器(permanent-magnet-biased saturation based fault current limiter,PMFCL)的动态特性具有重要影响。针对一种直线式PMFCL的磁拓扑,以铁心磁通的工作零点作为分界阐明了其2个阶段的限流机理,指出铁心磁...漏磁效应对永磁饱和型故障限流器(permanent-magnet-biased saturation based fault current limiter,PMFCL)的动态特性具有重要影响。针对一种直线式PMFCL的磁拓扑,以铁心磁通的工作零点作为分界阐明了其2个阶段的限流机理,指出铁心磁通自过零反向后将发生畸变,永磁体不再参与限流过程。基于磁场分割原理实现2类等效磁路模型中总漏磁导和漏磁系数的计算,针对拟圆环截面磁通管的漏磁导,提出基于曲线拟合而改变积分变量的求解方法。在Matlab/Simulink环境下建立了考虑漏磁效应的PMFCL仿真模型,分别与小电流和大电流工况的实验结果进行对比,验证了建模方法的有效性。展开更多
在简单介绍了姿态角和地磁场的基础上,分析了电子罗盘工作原理,设计了基于磁阻传感器、MEMS加速度传感器及SoC(System on Chip)MCU的电子罗盘。根据其构成的主要器件,分析、补偿和计算了系统误差。该电子罗盘具有体积小、重量轻、功耗...在简单介绍了姿态角和地磁场的基础上,分析了电子罗盘工作原理,设计了基于磁阻传感器、MEMS加速度传感器及SoC(System on Chip)MCU的电子罗盘。根据其构成的主要器件,分析、补偿和计算了系统误差。该电子罗盘具有体积小、重量轻、功耗低、价格低和精度高等优点。试验结果表明其能够很好地用于微型和超小型飞行器的姿态控制与导航。展开更多
文摘Spinal cord injury(SCI),which results in severe neurological loss and multiple complications,remains a global health problem.Although SCI is a central nervous system injury,thefield of related therapies has shown great promise,with breakthroughs regarding the theory of central nervous system irreparability.However,from the perspective of neuroprosthetics,the relevant basic theories are not always fully recognized or clearly understood,which poses a challenge to clinical practice guidance.Magnetic therapy technology has developed rapidly in recent years,and various magnetic therapy methods have emerged.Magneticfield therapy(MFT),with applications in SCI treatment,is considered a promising strategy for nerve repair and provides a theoretical foundation for subsequent research.MFT,including transcranial magnetic stimulation,static magneticfield,and pulsed electromagneticfield,has been used preclinically,and clinical studies have shown potential efficacy in SCI.Moreover,preclinical studies have revealed that MFT promotes nerve repair,reduces inflammatory responses,improves motor function,and enhances bladder control.They have also demonstrated that MFT is safe in human SCI patients and may improve motor function and pain control.However,its translation from preclinical studies to clinical application faces many challenges,including biological differences,determination of dose and treatment parameters,assessment of safety and side effects,and ethical and regulatory compliance.The present article aims to provide a comprehensive review of the applications and advances of MFT in SCI,to guide future research and provide a reference for clinical treatment.An in-depth discussion of MFT in thefield of SCI may provide new ideas and directions for neural repair in SCI.
文摘漏磁效应对永磁饱和型故障限流器(permanent-magnet-biased saturation based fault current limiter,PMFCL)的动态特性具有重要影响。针对一种直线式PMFCL的磁拓扑,以铁心磁通的工作零点作为分界阐明了其2个阶段的限流机理,指出铁心磁通自过零反向后将发生畸变,永磁体不再参与限流过程。基于磁场分割原理实现2类等效磁路模型中总漏磁导和漏磁系数的计算,针对拟圆环截面磁通管的漏磁导,提出基于曲线拟合而改变积分变量的求解方法。在Matlab/Simulink环境下建立了考虑漏磁效应的PMFCL仿真模型,分别与小电流和大电流工况的实验结果进行对比,验证了建模方法的有效性。
文摘在简单介绍了姿态角和地磁场的基础上,分析了电子罗盘工作原理,设计了基于磁阻传感器、MEMS加速度传感器及SoC(System on Chip)MCU的电子罗盘。根据其构成的主要器件,分析、补偿和计算了系统误差。该电子罗盘具有体积小、重量轻、功耗低、价格低和精度高等优点。试验结果表明其能够很好地用于微型和超小型飞行器的姿态控制与导航。
