中文说明：
利用雷达方程，分析在相干积累和非相干积累脉冲数两种情况下SNR增益与积累脉冲数的关系，得出相应的结论图像。
English Description：
Using the radar equation, the relationship between SNR gain and the number of accumulated pulses is analyzed in the case of coherent and incoherent accumulated pulses, and the corresponding conclusion is obtained.