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频率调制信号的最大偏移比率
The deviation ratio is given by:

$R_{d} = \frac{f_{d}}{B_{m}}=\frac{k_{f}|m(t)|_{\max}}{B_{m}}$ where

$B_{m}$ is the bandwidth of the message

$m(t)$ .

status	not learned	measured difficulty	37% [default]	last interval [days]
repetition number in this series	0	memorised on		scheduled repetition
scheduled repetition interval		last repetition or drill

No repetitions

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