$\left(x\mathrm{,}t\right)$

our method

Method [21]

$\left(\mathrm{0.1,0.1}\right)$

9.74824E-13

1.19E-08

$\left(\mathrm{0.2,0.2}\right)$

6.14349E-14

2.81E-11

$\left(\mathrm{0.4,0.4}\right)$

1.03907E-14

3.98E-11

$\left(\mathrm{0.6,0.6}\right)$

2.53647E-14

2.52E-11

$\left(\mathrm{0.8,0.8}\right)$

2.19862E-13

1.38E-13