It is the first time to research into the identification problem of major hazard source concerning widespread mined-out area instability systematacially.
首次对大面积采空区失稳的重大危险源辨识问题进行了系统研究。
This dissertation performed the following work based on the research before: (1) We studied the modulation identification problem of analogue modulated signals.
本文在前人的研究基础上主要做了如下工作：(1)研究了模拟调制信号的识别方法。
This dissertation performed the following work based on the research before: (1) We studied the modulation identification problem of analogue modulated signals.
本文在前人的研究基础上主要做了如下工作：(1)研究了模拟调制信号的识别方法。
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