z=k0+k1*x+k2*y+k12*x*y+k11*x^2+k22*y^2

k0,k1,k2,k12,k11,k22

ֵΪ1
====================

k0	160
k1	6
k2	30
k12	1
k11	-0.3
k22	-3

