针对家庭及社区的医疗监护系统需求,设计了一种基于物联网(Internet of Thing,IoT)的多导联心电信号(electrocardiogram,ECG)实时监测系统。本系统利用ADS1298前端实时采集ECG,通过蓝牙和Wi-Fi模块将信号分别发送给Android客户端和云服...针对家庭及社区的医疗监护系统需求,设计了一种基于物联网(Internet of Thing,IoT)的多导联心电信号(electrocardiogram,ECG)实时监测系统。本系统利用ADS1298前端实时采集ECG,通过蓝牙和Wi-Fi模块将信号分别发送给Android客户端和云服务器。在客户端中实现了ECG数据接收、数据解码、中值滤波、LMS自适应限波、QRS波检测以及ECG波形和诊断结果的显示;在云服务器中建立了数据库,用于保存用户的心电数据;还挂载了基于卷积神经网络的疾病诊断模型,可对用户心脏健康状态进行实时监测。展开更多
The mechanical properties of multi-lead rubber bearings （MLRBs） were investigated by experiment and finite element analysis. First, the vertical stiffness, horizontal stiffness and yielded shear force were tested fo...The mechanical properties of multi-lead rubber bearings （MLRBs） were investigated by experiment and finite element analysis. First, the vertical stiffness, horizontal stiffness and yielded shear force were tested for four MLRB specimens and two specimens of the single-lead rubber bearings （ SLRBs）. Then, the MLRBs were modeled by the explicit finite element analysis software ANSYS/ LS-DYNA, in order to evaluate the horizontal force-displacement hysteretic curves under static vertical and dynamical horizontal loadings. The disagreement between the tested and theoretical values was less than 11.4%, and MLRBs and SLRBs were similar in vertical stiffness, pre-yield stiffness and yield stiffness.展开更多
文摘针对家庭及社区的医疗监护系统需求,设计了一种基于物联网(Internet of Thing,IoT)的多导联心电信号(electrocardiogram,ECG)实时监测系统。本系统利用ADS1298前端实时采集ECG,通过蓝牙和Wi-Fi模块将信号分别发送给Android客户端和云服务器。在客户端中实现了ECG数据接收、数据解码、中值滤波、LMS自适应限波、QRS波检测以及ECG波形和诊断结果的显示;在云服务器中建立了数据库,用于保存用户的心电数据;还挂载了基于卷积神经网络的疾病诊断模型,可对用户心脏健康状态进行实时监测。
文摘The mechanical properties of multi-lead rubber bearings （MLRBs） were investigated by experiment and finite element analysis. First, the vertical stiffness, horizontal stiffness and yielded shear force were tested for four MLRB specimens and two specimens of the single-lead rubber bearings （ SLRBs）. Then, the MLRBs were modeled by the explicit finite element analysis software ANSYS/ LS-DYNA, in order to evaluate the horizontal force-displacement hysteretic curves under static vertical and dynamical horizontal loadings. The disagreement between the tested and theoretical values was less than 11.4%, and MLRBs and SLRBs were similar in vertical stiffness, pre-yield stiffness and yield stiffness.
