sponsored by the National Natural Science Foundation of China (Nos. 40774069 and 40974074);the State Key Program of National Natural Science of China (No. 40830424);the National 973program (No. 007209603)
An approximation for the one-way wave operator takes the form of separated space and wave-number variables and makes it possible to use the FFT, which results in a great improvement in the computational efficiency. Fr...