采用二阶RC模型，需要代入自己的数据的地方： R0 = @(x)(-0.07495*(x(4))^4+0.2187*(x(4))^3-0.1729*(x(4))^2+0.01904*(x(4))+0.1973); R1 = @(x)(0.07826*(x(4))^4-0.2208*(x(4))^3+0.217*(x(4))^2-0.08761*(x(4))+0.01664); R2 = @(x)(0.1248*(x(4))^4-0.2545*(x(4))^3+0.1254*(x(4))^2-0.03868*(x(4))+0.05978); C1 = @(x)(2431*(x(4))^4-4606*(x(4))^3+3084*(x(4))^2-589*(x(4))+209.8); C2 = @(x)(681.1*(x(4))^4-3197*(x(4))^3+4595*(x(4))^2-3114*(x(4))+1444);