中文说明：
在检测与估计中 仿真给出检查概率与虚警概率的关系 Pfa=1-Q(z),Pd=1-Q(z-d),画不同d情况下Pfa与Pd的关系图。
English Description：
In the detection and estimation, the relationship between detection probability and false alarm probability PFA = 1-Q (z), PD = 1-Q (Z-D) is given by simulation, and the relationship graph of PFA and PD under different d conditions is drawn