然而，如果列是字符数据类型，并且只包含数字字符，那么可以通过将NUMERIC_STRING选项设置为“Y”来表明这一点。

However, if the column is a character data type and contains only numeric characters, you can indicate this by setting the NUMERIC_STRING option to 'y.'

youdao

该方法无需设置判决门限，也无需进行参数训练，且可以识别大于四阶的数字调制类型。

Threshold and training parameters are not needed with this method, but can recognize higher-order digital modulation types.

youdao

该方法无需设置判决门限，也无需进行参数训练，且可以识别大于四阶的数字调制类型。

Threshold and training parameters are not needed with this method, but can recognize higher-order digital modulation types.

youdao