TY  - BOOK
A1  - Ramlau, Ronny
T1  - A modified Landweber-method for inverse problems
T3  - Preprint / Universität Potsdam, Institut für Mathematik
Y1  - 1997
VL  - 1997, 03
PB  - Univ.
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Maaß, Peter
A1  - Ramlau, Ronny
T1  - Wavelet accelerated iteration methods for hyperthermia treatment planning
Y1  - 1996
ER  - 
TY  - INPR
A1  - Maaß, Peter
A1  - Pereverzev, Sergei V.
A1  - Ramlau, Ronny
A1  - Solodky, Sergei G.
T1  - An adaptive discretization for Tikhonov-Phillips regularization with a posteriori parameter selection
N2  - The aim of this paper is to describe an efficient strategy for descritizing ill-posed linear operator equations of the first kind: we consider Tikhonov-Phillips-regularization χ^δ α = (a * a + α I)^-1 A * y ^δ with a finite dimensional approximation A n instead of A. We propose a sparse matrix structure which still leads to optimal convergences rates but requires substantially less scalar products for computing A n compared with standard methods.
T3  - NLD Preprints - 48 
Y1  - 1998
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-14739
ER  - 
TY  - JOUR
A1  - Maaß, Peter
A1  - Pereverzev, Sergei V.
A1  - Ramlau, Ronny
A1  - Solodky, Sergei G.
T1  - An adaptive discretization for Tikhonov-Phillips regularization with a posteriori parameter selection
JF  - Preprint NLD
Y1  - 1998
SN  - 1432-2935
VL  - 48
PB  - Univ. Potsdam
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Bernutat, Claudia
A1  - Böckmann, Christine
A1  - Ramlau, Ronny
T1  - Examination of the Nonlinear LIDAR-Operator : an Inverse Ill-posed Problem
Y1  - 1998
ER  -