(2)脉冲多普勒测量二尖瓣口血流频谱E峰及A峰的峰值速度、E峰的减速时间(deceleration time, DT)。二尖瓣环内环脉冲组织多普勒测量Ea、Aa、Sa峰值速度。
基于4个网页-相关网页
·2,447,543篇论文数据,部分数据来源于NoteExpress
The low inertia of the rotor enhances the quality of the mechanical response of the motor, shortening the acceleration and deceleration time.
低转动惯量的转子提高了电机机械响应的质量,从而缩短了电机加速和减速的时间;
The ways of cancelling over voltage are setting up deceleration time, consumption of energy, feedback electric network brake and Shared direct current bus bar soaking regenerated energy.
消除过电压主要通过设置变频器的减速时间、能量消耗、回馈电网制动以及共用直流母线吸收再生能量几种方法消除。
应用推荐