多普勒效应体现了无线信道的时变特性。
Doppler effect reflects the time-varying characteristics of wireless channel.
体现此效应的关键在于推出时变的尾迹弯曲参数KR。
The key to represent this effect is a time-accurate wake curvature parameter KR.
当激光器上升沿变陡时，在有效作用时间内温度上升得更快，对加工区域周围热效应的影响明显减弱，而热扩散距离变小。
When the rise time is steeper, the temperature rises faster, and the surrounding of the machining filed are less affected while the distance of the thermal diffusion reduces.
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