${\sigma }_{ϵ}^2$

0.25

0.5

1

2

4

CMMP-SPSRs

0.0243

0.0586

0.2451

0.3074

0.5982

RP

0.3101

0.4462

1.7147

1.7386

2.6358

%Improve

1176.13

661.92

599.49

465.58

340.62