MATLAB 2020a

data.xlsx: original data

t.mat: time from original data

sc.mat: s from original data

time.mat: time from clark data

s_clark: s from clark data

clark.m: chen's model fitted by clark data

main.m: Entrance

results.m: Validation function which is used to plot

fitness.m&fitness2.m: chen's model fitted by original data

Singh.m: Singh's Model fitted by original data

Singh_clark.m: Singh's Model fitted by clark data

new_PSO.m: PSO optimization by chen's model fitted by original data

PSO_Singh.m: PSO optimization by Singh's model fitted by original data

PSOClark.m: PSO optimization by chen's model fitted by clark data

alphaeffect: explore the effectness of different paramaters of chen's model