t

Ref. [2]

HATM [21]

Present

HPM

(4-term)

HPM

(7-term)

HPM

9-term)

Analytic solution

(Equation (29))

0.0

1

1

1

1

1

1

0.5

0.8727825992

0.8727825992

0.8728718032

0.8729409264

0.8729409265

0.8729409265

1.0

0.7694328044

0.7694328044

0.7709321110

0.7717847777

0.7717847885

0.7717847885

1.5

0.6788327993

0.6788327993

0.6865930139

0.6899347736

0.6899349261

0.6899349261

2.0

0.5898647673

0.5898647673

0.61449731667

0.6227074556

0.6227083998

0.6227083998