Table 1 Function equation parameter values.

\(\omega _{1} \)

2.122e+04

(2.116e+04, 2.128e+04)

\(\omega _{2} \)

−0.2344

(−0.236, −0.2327)

\(\omega _{3} \)

3.141e+04

(3.07e+04, 3.211e+04)

\(\omega _{4} \)

−3.225

(−3.343, −3.107)

\(\omega _{5} \)

1.814e+04

(1.797e+04, 1.832e+04)

\(\omega _{6} \)

−0.03668

(−0.03839, −0.03496)