Arch forces coefficients and fluctuating buffeting forces are mainly decided by the spacewidthratio and the relatively vertical displacement.
双拱的静力三分力系数、变异性以及受湍流度的影响等均与两拱间距宽度比及竖向相对位移有关。
2
Introduces two usual remote control signal encoding methods: pulse width modulation, pulse spaceratio modulation.
介绍了两种常用的红外遥控信号的编码方法:脉冲占空比编码调制,脉冲宽度编码调制。
3
Using space vector pulse-width modulation (SVPWM) signal transformation method, speed regulation of induction motor is implemented by controlling the duty ratio of every converter switch.