采用基于地理信息系统的图形叠置法对线路比选方案的噪声影响情况进行评价。
Graph overlay method is used in route alignment noise impact assessment to provide a basis for route alignment optimal selection.
正是这种被称为信噪比的东西，即真实信号与噪声的关系引起了通信工程师的极大的兴趣。从本质上讲，如果信号比噪声电平大得多，则信息的传输是完美的。
It is the relationship of the true signal to the noise signal, known as the signal-to-noise ratio, which is of the most interest to the communication engineer.
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