Two equivalent ways to achieve the goal of PMC Multi-scale scale-sefting approach Single-scale scale-setting approach Key: Based on the RGe, achieving the correct beta-series at each order p(Q)=n10a(pP+20+m2l()+1+0+mm2x+(+1)1+pp+1) B32|a()2 +{0+p2+(p+1)31+24132+(p+2)1+ (p+1)(p+2) 6r4,2 p(p+1)(p+2) 3! n3a()+3 利用已知β项一类似于重求和一可准确确定耦合常数值 ∑ Man+i-1 (QM.D+ p(Q)=∑n0a(Q)y+n- i.O s Residual scale dependence Relatively largeTwo equivalent ways to achieve the goal of PMC Multi-scale scale-setting approach Single-scale scale-setting approach Key: Based on the RGE, achieving the correct beta-series at each order 利用已知项－类似于重求和－可准确确定耦合常数值 Residual scale dependence Relatively large