Per Christian Hansen

  1. 2014
  2. Published

    A Computationally Efficient Tool for Assessing the Depth Resolution in Potential-Field Inversion. / Paoletti, V.; Hansen, Per Christian; Hansen, Mads Friis; Fedi, M.

    Kgs. Lyngby : Technical University of Denmark, 2014. 25 p. (DTU Compute-Technical Report-2014; No. 03).

    Publication: ResearchReport – Annual report year: 2014

  3. Published

    Gaussian translation operator for Multi-Level Fast Multipole Method. / Borries, Oscar Peter; Hansen, Per Christian; Sorensen, Stig B.; Meincke, Peter; Jorgensen, Erik.

    Proceedings of the 2014 IEEE Antennas and Propagation Society International Symposium. IEEE, 2014. p. 2152-2153 (I E E E Antennas and Propagation Society. International Symposium).

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

  4. Published

    Improved Multilevel Fast Multipole Method for Higher-Order discretizations. / Borries, Oscar Peter; Meincke, Peter; Jorgensen, Erik; Sorensen, Stig Busk; Hansen, Per Christian.

    Proceedings of the 8th European Conference on Antennas and Propagation (EuCAP 2014). IEEE, 2014. p. 3610-3614.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

  5. Published

    Multilevel Fast Multipole Method for Higher Order Discretizations. / Borries, Oscar Peter; Meincke, Peter; Jorgensen, Erik; Hansen, Per Christian.

    In: IEEE Transactions on Antennas and Propagation, Vol. 62, No. 9, 2014, p. 4695-4705.

    Publication: Research - peer-reviewJournal article – Annual report year: 2014

  6. Published

    Reflector antenna analysis using physical optics on Graphics Processing Units. / Borries, Oscar Peter; Sørensen, Hans Henrik Brandenborg; Dammann, Bernd; Jorgensen, Erik; Meincke, Peter; Sorensen, Stig Busk; Hansen, Per Christian.

    Proceedings of the 8th European Conference on Antennas and Propagation (EuCAP 2014). IEEE, 2014. p. 254-258.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

  7. Published

    Semi-convergence properties of Kaczmarz’s method. / Elfving, Tommy; Hansen, Per Christian; Nikazad, Touraj.

    In: Inverse Problems, Vol. 30, No. 5, 055007, 2014.

    Publication: Research - peer-reviewJournal article – Annual report year: 2014

  8. 2013
  9. E-pub ahead of print

    Generalized Row-Action Methods for Tomographic Imaging. / Andersen, Martin Skovgaard; Hansen, Per Christian.

    In: Numerical Algorithms, 2013.

    Publication: Research - peer-reviewJournal article – Annual report year: 2013

  10. Published

    Inverse Problems in Geosciences: Modelling the Rock Properties of an Oil Reservoir. / Lange, Katrine; Mosegaard, Klaus (Main supervisor); Hansen, Per Christian (Supervisor); Stenby, Erling Halfdan (Supervisor).

    Kgs. Lyngby : Technical University of Denmark, 2013. 248 p. (IMM-PHD-2013; No. 296).

    Publication: ResearchPh.D. thesis – Annual report year: 2013

  11. Published

    Least Squares Data Fitting with Applications. / Hansen, Per Christian; Pereyra, Víctor; Scherer, Godela.

    Baltimore : Johns Hopkins University Press, 2013. 328 p.

    Publication: Research - peer-reviewBook – Annual report year: 2012

  12. Published

    Oblique projections and standard-form transformations for discrete inverse problems. / Hansen, Per Christian.

    In: Numerical Linear Algebra with Applications, Vol. 20, No. 2, 2013, p. 250–258.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  13. E-pub ahead of print

    Rotational image deblurring with sparse matrices. / Hansen, Per Christian; Nagy, James G.; Tigkos, Konstantinos.

    In: BIT Numerical Mathematics, 2013, p. 1-23.

    Publication: Research - peer-reviewJournal article – Annual report year: 2014

  14. Published

    Sparse Image Reconstruction in Computed Tomography. / Jørgensen, Jakob Sauer; Hansen, Per Christian (Main supervisor); Schmidt, Søren (Supervisor).

    Kgs. Lyngby : Technical University of Denmark, 2013. 292 p. (PHD-2013; No. 293).

    Publication: ResearchPh.D. thesis – Annual report year: 2013

  15. Published

    The Homogeneous Interior-Point Algorithm: Nonsymmetric Cones, Warmstarting, and Applications. / Skajaa, Anders; Hansen, Per Christian (Main supervisor); Jørgensen, John Bagterp (Supervisor).

    Kgs. Lyngby : Technical University of Denmark, 2013. 149 p. (IMM-PHD-2013; No. 311).

    Publication: ResearchPh.D. thesis – Annual report year: 2014

  16. 2012
  17. Published

    AIR Tools - A MATLAB package of algebraic iterative reconstruction methods. / Hansen, Per Christian; Saxild-Hansen, Maria.

    In: Journal of Computational and Applied Mathematics, Vol. 236, No. 8, 2012, p. 2167-2178.

    Publication: Research - peer-reviewJournal article – Annual report year: 2010

  18. Published

    Electrical Impedance Tomography: 3D Reconstructions using Scattering Transforms. / Delbary, Fabrice; Hansen, Per Christian; Knudsen, Kim.

    In: Applicable Analysis, Vol. 91, No. 4, 2012, p. 737-755.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  19. Published

    Implementation of an optimal first-order method for strongly convex total variation regularization. / Jensen, Tobias Lindstrøm; Jørgensen, Jakob Heide; Hansen, Per Christian; Jensen, Søren Holdt.

    In: Bit (Lisse), Vol. 52, No. 2, 2012, p. 329–356.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  20. Submitted

    Quantitative study of undersampled recoverability for sparse images in computed tomography. / Jørgensen, Jakob Heide; Sidky, Emil Y.; Hansen, Per Christian; Pan, Xiaochuan.

    In: S I A M Journal on Scientific Computing, 2012.

    Publication: Research - peer-reviewJournal article – Annual report year: 2012

  21. Published

    Semiconvergence and Relaxation Parameters for Projected SIRT Algorithms. / Elfving, Tommy; Hansen, Per Christian; Nikazad, Touraj.

    In: S I A M Journal on Scientific Computing, Vol. 34, No. 4, 2012, p. A2000-A2017.

    Publication: Research - peer-reviewJournal article – Annual report year: 2012

  22. 2011
  23. Published

    Accelerated gradient methods for total-variation-based CT image reconstruction. / Jørgensen, Jakob Heide; Jensen, Tobias Lindstrøm; Hansen, Per Christian; Jensen, Søren Holdt; Sidky, Emil Y.; Pan, Xiaochuan.

    Proceedings of 11th Fully 3D Meeting. 2011.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2011

  24. Published

    A Direct Numerical Reconstruction Algorithm for the 3D Calderón Problem. / Delbary, Fabrice; Hansen, Per Christian; Knudsen, Kim.

    In: Journal of Physics: Conference Series (Print), Vol. 290, 2011, p. 012003.

    Publication: Research - peer-reviewConference article – Annual report year: 2011

  25. Published

    Image Deblurring with Krylov Subspace Methods. / Hansen, Per Christian (Invited author).

    Proceedings of WSC 2011. 2011.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2011

  26. Published

    On Implementing a Homogeneous Interior-Point Algorithm for Nonsymmetric Conic Optimization. / Skajaa, Anders; Jørgensen, John Bagterp; Hansen, Per Christian.

    Kgs. Lyngby : Technical University of Denmark, DTU Informatics, Building 321, 2011. (IMM-Technical Report-2011-02).

    Publication: ResearchReport – Annual report year: 2011

  27. Published

    Total Variation and Tomographic Imaging from Projections. / Hansen, Per Christian (Invited author); Jørgensen, Jakob Heide (Invited author).

    Proceedings of WSC 2011. 2011.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2011

  28. Published

    Toward optimal X-ray flux utilization in breast CT. / Jørgensen, Jakob Heide; Hansen, Per Christian; Sidky, Emil Y.; Reiser, Ingrid S.; Pan, Xiaochuan.

    Proceedings of 11th Fully 3D Meeting. 2011.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2011

  29. 2010
  30. Published

    AIR Tools - A MATLAB Package of Algebraic Iterative Reconstruction Techniques : Version 1.0 for Matlab 7.8. / Hansen, Per Christian; Saxild-Hansen, Maria.

    Kgs. Lyngby, Denmark : Technical University of Denmark, DTU Informatics, Building 321, 2010. (IMM-Technical Report-2010-15).

    Publication: ResearchReport – Annual report year: 2010

  31. Published

    Algorithms and software for total variation image reconstruction via first-order methods. / Dahl, Joahim; Hansen, Per Christian; Jensen, Søren Holdt; Jensen, Tobias Lindstrøm.

    In: Numerical Algorithms, Vol. 53, No. 1, 2010, p. 67-92.

    Publication: Research - peer-reviewJournal article – Annual report year: 2010

  32. Published

    Discrete Inverse Problems : Insight and Algorithms. / Hansen, Per Christian.

    Philadelphia : Society for Industrial and Applied Mathematics SIAM, 2010. 213 p. (Fundamentals of Algorithms; No. FA07).

    Publication: Research - peer-reviewBook – Annual report year: 2010

  33. Published

    Semi-convergence and relaxation parameters for a class of SIRT algorithms. / Elfving, Tommy; Nikazad, Touraj; Hansen, Per Christian.

    In: Electronic Transactions on Numerical Analysis, Vol. 37, 2010, p. 321-336.

    Publication: Research - peer-reviewJournal article – Annual report year: 2010

  34. Published

    Towards multi-exponential analysis in optically stimulated luminescence. / Ankjærgaard, Christina; Jain, Mayank; Hansen, Per Christian; Nielsen, Hans Bruun.

    In: Journal of Physics D: Applied Physics, Vol. 43, No. 19, 2010, p. 195501.

    Publication: Research - peer-reviewJournal article – Annual report year: 2010

  35. Published

    TVReg. / Jensen, Tobias Lindstrøm (Author); Jørgensen, Jakob Heide (Author); Hansen, Per Christian (Author); Jensen, Søren Holdt (Author).

    2010. .

    Publication: Research - peer-reviewComputer programme – Annual report year: 2011

  36. Published

    Two Exponential Models for Optically Stimulated Luminescence. / Hansen, Per Christian; Nielsen, Hans Bruun; Ankjærgaard, Christina; Jain, Mayank.

    Exponential Data Fitting and its Applications. ed. / Victor Pereyra; Godela Scherer. Bentham Science Publishers, 2010. p. 128-144.

    Publication: Research - peer-reviewBook chapter – Annual report year: 2009

  37. 2009
  38. Published
  39. Published

    A hybrid method for the parallel computation of Green's functions. / Petersen, Dan Erik; Li, Song; Stokbro, Kurt; Sørensen, Hans Henrik Brandenborg; Hansen, Per Christian; Skelboe, Stig; Darve, Eric.

    In: Journal of Computational Physics, Vol. 228, No. 14, 2009, p. 5020-5039.

    Publication: Research - peer-reviewJournal article – Annual report year: 2009

  40. Published

    Closing the gap between single crystal and powder diffraction. / Sørensen, Henning Osholm; Schmidt, Søren; Wright, Jonathan; Hansen, Per Christian; Poulsen, Henning Friis.

    2009. Paper presented at Congress and General Assembly of the International Union of Crystallography, Osaka, Japan.

    Publication: ResearchPaper – Annual report year: 2009

  41. Published

    Computer simulation: dynamical systems and multiscale modeling. / Hansen, Per Christian; Hesthaven, Jan; Juul Rasmussen, Jens.

    Engineering challenges: energy, climate change & health. ed. / Carsten Broder Hansen. Kgs.Lyngby : Technical University of Denmark, 2009. p. 94-105 (DTU research series).

    Publication: ResearchBook chapter – Annual report year: 2009

  42. Published

    Efficient wave-function matching approach for quantum transport calculations. / Sørensen, Hans Henrik Brandenborg; Hansen, Per Christian; Petersen, Dan Erik; Skelboe, Stig; Stokbro, Kurt.

    In: Physical Review B (Condensed Matter and Materials Physics), Vol. 79, No. 20, 2009, p. 205322.

    Publication: Research - peer-reviewJournal article – Annual report year: 2009

  43. Published

    Integrated intensities based on grain orientation distribution functions. / Sørensen, Henning Osholm; Wright, Jonathan; Schmidt, Søren; Hansen, Per Christian; Poulsen, Henning Friis.

    2009. Paper presented at Total Cryst Workshop, Grenoble (FR), 1-3 Apr., .

    Publication: ResearchPaper – Annual report year: 2009

  44. Published

    Matematikken i computerens verden - computeren i matematikkens tjeneste. / Dammann, Bernd; Hansen, Per Christian.

    Matematiske horisonter. ed. / Carsten Broder Hansen; Per Christian Hansen; Vagn Lundsgaard Hansen; Mette Minor Andersen. Technical University of Denmark (DTU), 2009. p. 189-201.

    Publication: EducationBook chapter – Annual report year: 2009

  45. Published

    Matematiske horisonter. / Hansen, Carsten Broder (Editor); Hansen, Per Christian (Editor); Hansen, Vagn Lundsgaard (Editor); Andersen, Mette Minor (Editor).

    Kgs. Lyngby, Denmark : Technical University of Denmark (DTU), 2009. 288 p.

    Publication: EducationBook – Annual report year: 2009

  46. Published
  47. 2008
  48. Published
  49. Published

    A study on regularization parameter choice in near-field acoustical holography. / Gomes, Jesper; Hansen, Per Christian.

    In: Acoustical Society of America. Journal, Vol. 123, No. 5, 2008, p. 3385-3385.

    Publication: Research - peer-reviewConference article – Annual report year: 2008

  50. Published

    Block Tridiagonal Matrix Inversion and Fast Transmission Calculations. / Petersen, Dan Erik; Sørensen, Hans Henrik Brandenborg; Hansen, Per Christian; Skelboe, Stig; Stokbro, Kurt.

    In: Journal of Computational Physics, Vol. 227, No. 6, 2008, p. 3174-3190.

    Publication: Research - peer-reviewJournal article – Annual report year: 2008

  51. Published

    Krylov subspace method for evaluating the self-energy matrices in electron transport calculations. / Sørensen, Hans Henrik Brandenborg; Hansen, Per Christian; Petersen, D. E.; Skelboe, S.; Stokbro, Kurt.

    In: Physical Review B (Condensed Matter and Materials Physics), Vol. 77, No. 15, 2008, p. 155301.

    Publication: Research - peer-reviewJournal article – Annual report year: 2008

  52. Published

    Noise propagation in regularizing iterations for image deblurring. / Hansen, Per Christian; Jensen, Toke Koldborg.

    In: Electronic Transactions on Numerical Analysis, Vol. 31, 2008, p. 204-220.

    Publication: Research - peer-reviewJournal article – Annual report year: 2008

  53. Published

    Reconstruction of Single-Grain Orientation Distribution Functions for Crystalline Materials. / Hansen, Per Christian; Sørensen, Henning Osholm; Sükösd, Zsuzsanna; Poulsen, Henning Friis.

    Techincal University of Denmark, Informatics, Building 321, 2008. (IMM-Technical Report-2008-05; No. 2008-05).

    Publication: ResearchReport – Annual report year: 2008

  54. 2007
  55. Published

    Finite Discrete Gabor Analysis. / Søndergaard, Peter Lempel; Hansen, Per Christian (Supervisor); Christensen, Ole (Supervisor).

    2007. 190 p.

    Publication: ResearchPh.D. thesis – Annual report year: 2007

  56. Published

    A convex programming approach to anisotropic smoothing. / Dahl, Joachim; Jansen, Søren Holdt; Hansen, Per Christian.

    IEEE International Conference on Image Processing (ICIP). Vol. II San Antonio, TX : IEEE, 2007. p. 104-104.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2007

  57. Published

    Ambiguity in depth resolution in potential field inversion. / Fedi, Maurizio; Hansen, Per Christian; Paoletti, Valeria.

    In: Communications to SIMAI Congress, Vol. 2, 2007.

    Publication: Research - peer-reviewJournal article – Annual report year: 2007

  58. Published

    An adaptive pruning algorithm for the discrete L-curve criterion. / Hansen, Per Christian; Jensen, Toke Koldborg; Rodriguez, Giuseppe.

    In: Journal of Computational and Applied Mathematics, Vol. 198, No. 2, 2007, p. 483-492.

    Publication: Research - peer-reviewJournal article – Annual report year: 2007

  59. Published

    A projection-based approach to general-form Tikhonov regularization. / Kilmer, Misha E.; Hansen, Per Christian; Espanol, Malena I.

    In: S I A M Journal on Scientific Computing, Vol. 29, No. 1, 2007, p. 315-330.

    Publication: Research - peer-reviewJournal article – Annual report year: 2007

  60. Published

    Iterative Regularization with Minimum-Residual Methods. / Jensen, Toke Koldborg; Hansen, Per Christian.

    In: BIT Numerical Mathematics, Vol. 47, No. 1, 2007, p. 103-120.

    Publication: Research - peer-reviewJournal article – Annual report year: 2007

  61. Published

    Large-scale methods in image deblurring. / Hansen, Per Christian (Invited author).

    Applied Parallel Computing: State of the Art in Scientific Computing. ed. / Bo Kågström; Erik Elmroth; Jack J. Dongarra; Jerzy Wasniewski. Springer, 2007. p. 24-35 (Lecture Notes in Computer Science; No. 4699).

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2007

  62. Published

    Regularization Tools Version 4.0 for Matlab 7.3. / Hansen, Per Christian.

    In: Numerical Algorithms, Vol. 46, No. 2, 2007, p. 189-194.

    Publication: Research - peer-reviewJournal article – Annual report year: 2007

  63. Published
  64. 2006
  65. Published

    Stabilization Algorithms for Large-Scale Problems. / Jensen, Toke Koldborg; Hansen, Per Christian (Supervisor).

    2006. (IMM-PHD-2006-163).

    Publication: ResearchPh.D. thesis – Annual report year: 2006

  66. Published

    Deburring Images: Matrices, Spectra, and Filtering. / Hansen, Per Christian; Nagy, James G.; O'Leary, Dianne P.

    Philidelphia : SIAM, 2006. 130 p. (Fundamentals of Algorithms; No. FA03).

    Publication: Research - peer-reviewBook – Annual report year: 2006

  67. Published

    Exploiting residual information in the parameter choice for discrete ill-posed problems. / Hansen, Per Christian; Kilmer, Misha E.; Kjeldsen, Rikke Høj.

    In: BIT Numerical Mathematics, Vol. 46, No. 1, 2006, p. 41-59.

    Publication: Research - peer-reviewJournal article – Annual report year: 2006

  68. Published

    Iterative regularization with minimum-residual methods. / Jensen, Toke Koldborg; Hansen, Per Christian.

    2006.

    Publication: Research - peer-reviewReport – Annual report year: 2006

  69. Published

    Least Squares Solution of Linear Systems. / Hansen, Per Christian; Nielsen, Hans Bruun.

    Handbook of Linear Algebra. ed. / Leslie Hogben. Chapman & Hall, 2006.

    Publication: Research - peer-reviewBook chapter – Annual report year: 2006

  70. Published

    Smoothing-Norm Preconditioning for Regularizing Minimum-Residual Methods. / Hansen, Per Christian; Jensen, Toke Koldborg.

    In: SIAM journal on matrix analysis and applications, Vol. 29, No. 1, 2006, p. 1-14.

    Publication: Research - peer-reviewJournal article – Annual report year: 2006

  71. Published

    Subspace-Based Noise Reduction for Speech Signals via Diagonal and Triangular Matrix Decompositions. / Hansen, Per Christian; Jensen, Søren Holdt.

    Informatics and Mathematical Modelling, Technical University of Denmark, DTU, 2006.

    Publication: Research - peer-reviewReport – Annual report year: 2006

  72. 2005
  73. Published

    Minimization of linear functionals defined on solutions of large-scale discrete ill-posed problems. / Eldén, Lars; Hansen, Per Christian; Rojas, Marielba.

    In: BIT Numerical Mathematics, Vol. 45, No. 2, 2005, p. 329-340.

    Publication: Research - peer-reviewJournal article – Annual report year: 2005

  74. Published

    Prewhitening for Rank-Deficient Noise in Subspace Methods for Noise Reduction. / Hansen, Per Christian; Jensen, Søren Holdt.

    In: I E E E Transactions on Signal Processing, Vol. 53, No. 10/1, 2005, p. 3718-3726.

    Publication: Research - peer-reviewJournal article – Annual report year: 2005

  75. Published

    Tutorial : analysis of depth resolution in potential-field inversion. / Fedi, Maurizio; Hansen, Per Christian; Paoletti, Valeria.

    In: Geophysics, Vol. 70, No. 6, 2005, p. A1-A11.

    Publication: Research - peer-reviewJournal article – Annual report year: 2005

  76. Published

    UTV Expansion Pack: Special-Purpose Rank-Revealing Algorithms. / Fierro, Ricardo D.; Hansen, Per Christian.

    In: Numerical Algorithms, Vol. 40, No. 1, 2005, p. 47-66.

    Publication: Research - peer-reviewJournal article – Annual report year: 2005

  77. 2004
  78. Published
  79. Published

    Modular Regularization Algorithms. / Jacobsen, Michael; Hansen, Per Christian (Supervisor).

    2004.

    Publication: ResearchPh.D. thesis – Annual report year: 2004

  80. Published

    An Adaptive Pruning Algorithm for the Discrete L-Curve Criterion. / Hansen, Per Christian; Jensen, Toke Koldborg; Rodriguez, Giuseppe.

    2004. 23 p.

    Publication: ResearchReport – Annual report year: 2004

  81. Published

    Oblique projections, pseudoinverses, and standard-form transformations. / Hansen, Per Christian.

    2004.

    Publication: ResearchReport – Annual report year: 2004

  82. Published
  83. Published

    Smoothing-norm preconditioning for GMRES. / Hansen, Per Christian; Jensen, Toke Koldborg.

    2004.

    Publication: ResearchReport – Annual report year: 2004

  84. Published

    UTV Expansion Pack - Special-Purpose Rank Revealing Algorithms (version 1.0 for Matlab 6.5). / Fierro, Ricardo D.; Hansen, Per Christian.

    Lyngby : Informatics and Mathematical Modelling, Technical University of Denmark, DTU, 2004.

    Publication: ResearchReport – Annual report year: 2004

  85. 2003
  86. Published

    Minimization of Linear Functionals Defined on| Solutions of Large-Scale Discrete Ill-Posed Problems. / Elden, Lars; Hansen, Per Christian; Rojas, Marielba.

    2003.

    Publication: Research - peer-reviewReport – Annual report year: 2003

  87. Published

    Sound source reconstruction using inverse boundary element calculations. / Schuhmacher, Andreas; Hald, Jørgen; Rasmussen, Karsten Bo; Hansen, Per Christian.

    In: Acoustical Society of America. Journal, Vol. 113, No. 1, 2003, p. 114-127.

    Publication: Research - peer-reviewJournal article – Annual report year: 2003

  88. Published

    Subscpace preconditioned LSQR for discrete ill-posed problems. / Jacobsen, Michael; Hansen, Per Christian; Saunders, Michael A.

    In: BIT Numerical Mathematics, Vol. 43, No. suppl., 2003, p. 975-989.

    Publication: Research - peer-reviewJournal article – Annual report year: 2003

  89. 2002
  90. Published

    Computational properties of algorithmes for multi-level inversion of 3-D potential fields. / Andersen, Marie L.; Fedi, M.; Hansen, Per Christian; Rapolla, A.

    2002.

    Publication: Research - peer-reviewReport – Annual report year: 2002

  91. Published

    Computational properties of algorithms for multi-level inversion of 3-D potential fields. / Andersen, Marie Lund; Fedi, Maurizio; Hansen, Per Christian; Paoletti, Valeria; Rapolla, Antonio.

    Lyngby : Technical University of Denmark, DTU Informatics, Building 321, 2002. (IMM-Technical Report-2002-16).

    Publication: Research - peer-reviewReport – Annual report year: 2002

  92. Published

    Deconvolution and Regularization with Toeplitz Matrices. / Hansen, Per Christian.

    In: Numerical Algorithms, Vol. 29, No. 4, 2002, p. 323-378.

    Publication: Research - peer-reviewJournal article – Annual report year: 2002

  93. Published

    Exploiting residual information in the regularization of discrete ill-posed problems. / Hansen, Per Christian; Kilmer, Misha; Kjeldsen, Rikke Høj.

    2002.

    Publication: ResearchReport – Annual report year: 2002

  94. Published

    L-Curve Curvature Bounds via Lanczos Bidiagonalization. / Calvetti, Daniela; Hansen, Per Christian; Reichel, Lothar.

    In: Electronic Transactions on Numerical Analysis, Vol. 14, 2002, p. 134-149.

    Publication: Research - peer-reviewJournal article – Annual report year: 2002

  95. Published

    Recent Developments in Rank Revealing and Lanczos Methods for TLS-Related Problems. / Fierro, Ricardo D.; Hansen, Per Christian.

    Total Least Squares and Errors-in-Variables Modeling. ed. / Sabine van Huffel. Kluwer Academic, 2002. p. 47-56.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2002

  96. Published

    Subspace preconditioned LSQR for discrete ill-posed problems. / Jacobsen, Michael; Hansen, Per Christian; Saunders, Michael A.

    2002.

    Publication: ResearchReport – Annual report year: 2002

  97. Published

    Truncated VSV Solutions to Symmetric Rank-Deficient Problems. / Fierro, Ricardo D.; Hansen, Per Christian.

    In: BIT, Vol. 42, No. 3, 2002, p. 531-540.

    Publication: Research - peer-reviewJournal article – Annual report year: 2002

  98. 2001
  99. Published

    Computing Symmetric Rank-Revealing Decompositions via Triangular Factorization. / Hansen, Per Christian; Yalamov, Plamen Y.

    In: S I A M Journal on Matrix Analysis and Applications, Vol. 23, No. 2, 2001, p. 443-458.

    Publication: Research - peer-reviewJournal article – Annual report year: 2001

  100. Published

    L-curve curvature bounds via Lanczos bidiagonalization. / Calvetti, D.; Hansen, Per Christian; Reichel, L.

    2001.

    Publication: Research - peer-reviewReport – Annual report year: 2001

  101. Published

    Rank-Revealing Decompositions of Symmetric Toeplitz Matrices. / Hansen, Per Christian; Yalamov, Plamen Y.

    Structured Matrices in Mathematics, Computer Science, and Engineering II. ed. / V. Olshevsky. American Mathematical Society, 2001. p. 163-171.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2001

  102. Published

    Sound source reconstruction using inverse BEM. / Schuhmacher, Andreas P.; Hansen, Per Christian.

    InterNoise 2001, The Hague, Holland. ed. / R. Boone. 2001. p. 2109-2112.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2001

  103. Published
  104. Published

    The L-Curve and its Use in the Numerical Treatment of Inverse Problems. / Hansen, Per Christian.

    Computational Inverse Problems in Electrocardiology. ed. / P. Johnston. WIT Press, 2001. p. 119-142.

    Publication: Research - peer-reviewBook chapter – Annual report year: 2001

  105. Published

    Truncated VSV solutions to symmetric rank-deficient problems. / Fierro, Richardo D.; Hansen, Per Christian.

    2001.

    Publication: Research - peer-reviewReport – Annual report year: 2001

  106. 2000
  107. Published

    Canonical filters and rank-reduction algorithms. / Hansen, Per Christian; Hansen, Peter Søren Kirk; Hansen, Steffen Duus; Sørensen, John Aasted.

    IMM Publications, 2000.

    Publication: Research - peer-reviewReport – Annual report year: 2000

  108. Published

    Methods and Applications of Inversion. / Hansen, Per Christian (Editor); Jacobsen, Bo Holm (Editor); Mosegaard, Klaus (Editor).

    Springer, 2000. 304 p. (Lecture Notes in Earth Science; No. 92).

    Publication: Research - peer-reviewBook – Annual report year: 2000

  109. Published

    Stabilization by Perturbation of a 4n^2 Toeplitz Solver. / Hansen, Per Christian; Yalamov, P. Y.

    In: SIAM Journal on Matrix Analysis and Applications, 2000, p. 849-867.

    Publication: Research - peer-reviewJournal article – Annual report year: 2000

  110. Published

    The L-curve and its use in the numerical treatment of inverse problems. / Hansen, Per Christian.

    InviteComputational Inverse Problems in Electrocardiology. WIT Press, 2000.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2000

  111. Published

    The LINPACK benchmark in Co-Array Fortran. / Reid, John K.; Rasmussen, Jan Marthedal; Hansen, Per Christian.

    Proc. 6th European SGI/Cray MPP Workshop. ed. / B. J. Jesson. 2000.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2000

  112. Published

    The PP-TSVD Algorithm for Image Reconstruction Problems. / Hansen, Per Christian; Jacobsen, Michael; Rasmussen, Jan Marthedal; Sørensen, H.

    Methods and Applications of Inversion. Springer, 2000. p. 171-186.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2000

  113. Published

    Tikhonov Regularization and Total Least Squares. / Golub, G. H.; Hansen, Per Christian; O'Leary, D. P.

    In: SIAM Journal of Matrix Analysis and Applications, Vol. 21, No. 1, 2000, p. 185-194.

    Publication: Research - peer-reviewJournal article – Annual report year: 2000

  114. 1999
  115. Published

    Constrained Linear Regularization. / Berglund, Eva Ann-Charlotte; Hansen, Per Christian; Jacobsen, B. H. (Editor).

    Proceedings of the Interdisciplinary Inversion Workshop 6. Dept. of Earth Science, 1999. p. 46-53.

    Publication: ResearchArticle in proceedings – Annual report year: 1999

  116. Published

    Experimental Comparison of Signal Subspace Based Noise Reduction Methods. / Hansen, Peter Søren Kirk; Hansen, Per Christian; Hansen, Steffen Duus; Sørensen, John Aasted.

    Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing. Vol. 1 1999. p. 101-104.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1999

  117. Published

    Regularization Tools Version 3.0 for Matlab 5.2. / Hansen, Per Christian.

    In: Numerical Algorithms, Vol. 20, No. 3, 1999, p. 195-196.

    Publication: Research - peer-reviewJournal article – Annual report year: 1999

  118. Published

    Symmetric Rank-Revealing Decompositions. / Hansen, Per Christian; Yalamov, P. Y.

    1999. 11 p.

    Publication: Research - peer-reviewReport – Annual report year: 1999

  119. Published

    The L-Curve and Its Use in the Numerical Treatment of Inverse Problems. / Hansen, Per Christian.

    1999. 25 p.

    Publication: Research - peer-reviewReport – Annual report year: 1999

  120. Published

    UTV Tools : Matlab Templates for Rank-Revealing UTV Decompositions, version 1.0 for Matlab 5.2. / Fierro, Ricardo D.; Hansen, Per Christian; Hansen, Peter Søren Kirk.

    Lyngby : Informatics and Mathematical Modelling, Technical University of Denmark, DTU, 1999. 97 p.

    Publication: Research - peer-reviewReport – Annual report year: 1999

  121. Published

    UTV Tools : Matlab Templates for Rank-Revealing UTV Decompositions. / Fierro, Ricardo D.; Hansen, Per Christian; Hansen, Peter Søren Kirk.

    In: Numerical Algorithms, Vol. 20, No. 2-3, 1999, p. 165-194.

    Publication: Research - peer-reviewJournal article – Annual report year: 1999

  122. 1998
  123. Published

    A Coarse-Grained Parallel QR-Factorization Algorithms for Sparse Least Squares Problems. / Ostromsky, Tzvetan; Hansen, Per Christian; Zlatev, Zahari.

    In: Parallel Computing, Vol. 24, 1998, p. 937-964.

    Publication: Research - peer-reviewJournal article – Annual report year: 1998

  124. Published

    FIR Filter Representations of Reduce-Rank Noise Reduction. / Hansen, Per Christian; Jensen, Søren Holdt.

    In: IEEE Transactions on Signal Processing, Vol. 46, 1998, p. 1737-1741.

    Publication: Research - peer-reviewJournal article – Annual report year: 1998

  125. Published

    On Speech Enhancement Algorithms Based on Signal Subspace Methods. / Hansen, Peter Søren Kirk; Hansen, Per Christian; Hansen, Steffen Duus; Sørensen, John Aasted.

    IEEE Nordic Signal Processing Symposium, NORSIG-98. 1998. p. 221-224.

    Publication: ResearchArticle in proceedings – Annual report year: 1998

  126. Published

    Rank-Deficient and Discrete Ill-Posed Problems : Numerical Aspects of Linear Inversion. / Hansen, Per Christian.

    Philadelphia : SIAM, 1998. 247 p. (SIAM Monographs of Mathematical Modeling and Computation; No. MM04).

    Publication: Research - peer-reviewBook – Annual report year: 1998

  127. Published

    Rank-deficient prewhitening with quotient SVD and ULV decompositions. / Hansen, Per Christian.

    In: BIT, Vol. 38, No. 1, 1998, p. 34-43.

    Publication: Research - peer-reviewJournal article – Annual report year: 1998

  128. Published
  129. 1997
  130. Published

    Low-rank revealing UTV decompositions. / Hansen, Per Christian; Fierro, R.D.

    In: Numerical Algorithms, Vol. 15, No. 1, 1997, p. 37-55.

    Publication: Research - peer-reviewJournal article – Annual report year: 1997

  131. Published

    Regularization by truncated total least squares. / Hansen, Per Christian; Fierro, R.D; Golub, G.H; O'Leary, D.P.

    In: SIAM J. Sci. Comput, Vol. 18, No. 4, 1997, p. 1223-1241.

    Publication: Research - peer-reviewJournal article – Annual report year: 1997

  132. Published

    Return of the TLS Regularization. / Golub, Gene H.; Hansen, Per Christian; O'Leary, Dianne P.

    Proceedings of the Interdisciplinary Inversion Workshop 5. ed. / B. H. Jacobsen. Dept. of Earth Science, 1997. p. 112-122.

    Publication: ResearchArticle in proceedings – Annual report year: 1997

  133. Published

    Solving sparse linear least squares problems on some supercomputers by using large dense blocks. / Hansen, Per Christian; Ostromsky, T; Sameh, A; Zlatev, Z.

    In: BIT, Vol. 37, No. 3, 1997, p. 535-558.

    Publication: Research - peer-reviewJournal article – Annual report year: 1997

  134. Published

    Tikhonov regularization and total least squares. / Golub, G.H.; Hansen, Per Christian; O'Leary, D. P.

    1997. 10 p.

    Publication: Research - peer-reviewReport – Annual report year: 1997

  135. Published

    ULV-Based Signal Subspace Method for Speech Enhancement. / Hansen, Peter Søren Kirk; Hansen, Per Christian; Hansen, Steffen Duus; Sørensen, John Aasted.

    International Workshop on Acoustic Echo and Noise Control, IWAENC'97. London : Imperial Collega, 1997. p. 9-12.

    Publication: ResearchArticle in proceedings – Annual report year: 1997

  136. Published

    ULV-based signal subspace methods for speech enhancement. / Hansen, Per Christian; Hansen, P.S.K.; Hansen, S.D; Soerensen, J.Aa.

    Proceedings of International Workshop on Acoustic Echo and Noise Control. Imperial College London, 1997. p. 9-12.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1997

  137. 1996
  138. Published

    A Parallel sparse QR-factorization algorith. / Hansen, Per Christian; Ostromsky, Tz.; Zlatev, Z.

    Applied Parallel Computing, Proceedings. Berlin : Springer, 1996. p. 462-472.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1996

  139. Published

    A Parallel Sparse QR-Factorization Algorithm. / Ostromsky, Tzvetan; Hansen, Per Christian; Zlatev, Zahari; Dongarra, J. (Editor); Madsen, K. (Editor); Wasniewski, J. (Editor).

    Applied Parallel Computing. Springer, 1996. p. 462-472.

    Publication: ResearchArticle in proceedings – Annual report year: 1996

  140. Published

    Comparing the performance of SIMD computers by running large air pollution models. / Brown, J.; Hansen, Per Christian; Wasniewski, J.; Zlatev, Z.

    In: Supercomputer, Vol. 64, 1996, p. 21-35.

    Publication: ResearchJournal article – Annual report year: 1996

  141. Published

    Filter Model of Redeuced-Rank Noise Reduction. / Hansen, Per Christian; Jensen, Søren Holdt; Wasniewski, Jerzy (Editor); Dongarra, J. (Editor); Madsen, Kaj (Editor); Olesen, D. (Editor).

    Applied Parallel Computing. Springer, 1996. p. 379-387.

    Publication: ResearchArticle in proceedings – Annual report year: 1996

  142. Published

    Noise Reduction of Speech Signals using the Rank-Revealing ULLV Decomposition. / Hansen, Peter Søren Kirk; Hansen, Per Christian; Hansen, Steffen Duus; Sørensen, John Aasted; Carrato, S. (Editor).

    Signal Processing VIII. Theories and Applications, EUSIPCO-96. ed. / G. Ramponi; G. L. Sicuranza; S. Carrato; S. Marsi. 1996. p. 967-970.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1996

  143. Published

    Performance of air pollution models on. / Hansen, Per Christian; Brown, J.; Wasniewski, J.; Zlatev, Z.

    Control and Cybernetics 25. 1996. p. 1113-1130.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1996

  144. Published

    Performance of Air Pollution Models on Massively Parallel Computers. / Brown, John; Hansen, Per Christian; Wasniewski, Jerzy; Zlatev, Zahari.

    In: Control and Cybernetics, Vol. 25, No. 5, 1996, p. 1113-1130.

    Publication: Research - peer-reviewJournal article – Annual report year: 1996

  145. Published

    Piecewise polynomial solutions to linear inverse problems. / Hansen, Per Christian; Mosegaard, K.

    Inverse Methods. Berlin : Springer, 1996.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1996

  146. Published

    Proceedings of the Interdisciplinary Inversion Workshop 4, Lyngby 1996. / Hansen, Per Christian (Editor).

    Proceedings of the Interdisciplinary Inversion Workshop 4, Lyngby 1996. Department of Mathematical Modelling, Technical University of Denmark, 1996.

    Publication: ResearchArticle in proceedings – Annual report year: 1996

  147. Published

    Rank-Deficient and Discrete Ill-Posed Problems. / Hansen, Per Christian.

    1996. 150 p.

    Publication: ResearchDoctoral thesis – Annual report year: 1996

  148. Published

    Reduced-Rank Noise Reduction: A Filter-Bank Interpretation. / Jensen, Søren Holdt; Hansen, Per Christian.

    Signal Processing VIII. Theories and Applications, EUSIPCO-96. ed. / G. Ramponi; G. L. Sicuranza; S. Carrato; S. Marsi. 1996. p. 479-482.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1996

  149. Published

    Regularization algorithms based on total least squares. / Hansen, Per Christian; O'Leary, Dianne P.

    Recent Advances in Total Least Squares Techniques and Errors-in-Variables. ed. / Sabine Van Huffel. Philadelphia : SIAM, 1996. p. 127-137.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1996

  150. 1984
  151. Published

    Suppression of reflections by directive probes in spherical near-field measurements. / Hansen, Per Christian; Larsen, Flemming H.

    In: I E E E Transactions on Antennas and Propagation, Vol. 32, No. 2, 1984, p. 119-125.

    Publication: Research - peer-reviewJournal article – Annual report year: 1984

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