One is attenuation control mode and the other is power control mode.
一种是衰减比例控制模式，另一种是功率控制模式。
There have been few researches on disturbance attenuation control for power-assisted wheelchairs, although they are getting more requested.
尽管电动辅助轮椅越来越需要干扰抑制控制，但是这类研究还不多。
The circuits can be realized easily and used conveniently and have a wide attenuation range. And the signal attenuation control can be automatized.
这两种电路容易实现，使用简便，具有较大的衰减范围，实现了信号衰减控制自动化。
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