a = 0.76452815762753590649990825866544
b = -0.069240174773949064608619074967693
c = -0.034955456314715823387225240559933
d = 0.73625147841146081340292870767571
e = -0.078950207786282371904992218503272
f = -0.030050754173009709818030158373108
matlab跑出来的结果