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 the detection probability and the false alarm probability is given, PFA = 1-Q (z), PD = 1-Q (Z-D), and the relationship between PFA and PD under different d conditions is drawn