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Table of Contents
Preconditioning
PRECONDITIONED DATA FITTING
Preconditioner conflicts with starting guess
PRECONDITIONING THE REGULARIZATION
The second miracle of conjugate gradients
Importance of scaling
Statistical interpretation
PRECONDITIONING AND INTERVAL VELOCITY
NULL SPACE AND INTERVAL VELOCITY
Balancing good data with bad
Blocky models
Lateral variations
INVERSE LINEAR INTERPOLATION
EMPTY BINS AND PRECONDITIONING
VIRTUAL-RESIDUAL PRECONDITIONING
The classic underdetermined least-squares problem
The virtual-residual preconditioning algorithm
SCALING THE ADJOINT
ACKNOWLEDGEMENTS
About this document ...
Stanford Exploration Project
2/27/1998
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