In this paper a fitting decomposition method is proposed and the principles for construe - ting equations which characterize the absorbing boundary conditions is discussed for wave equation migration.

Algorithms for iteratively refining the parameter estimates and residuals from the fitting of a regression model using QR decomposition are described.

Through the kinetics model fitting of CH_3SCH_3 decomposition, it is considered that CH_3SCH_3 decomposition conforms to no significant radical terminations model.