Journal Article 2 linear least squares CHARMM 1 Chebyshev semi-iterative method 1 LAPACK 1 LSQR 1 Research Support, N.I.H., Extramural 1 mehr ... Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, Non-P.H.S. 1 Tikhonov regularization 1 empirical force fields 1 iterative method 1 minimum-length solution 1 optimization 1 over determined system 1 parallel computing 1 preconditioning 1 random matrix 1 random projection 1 random sampling 1 randomized algorithm 1 rank-deficient 1 ridge regression 1 robustness 1 sparse matrix 1 underdetermined system 1 weniger ...