Per Christian Hansen

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  1. 2013
  2. Submitted

    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. (IMM-PHD-2013; No. 296).

    Publication: Research › Ph.d. thesis – Annual report year: 2013

  3. Published

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

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

    Publication: Research › Book – Annual report year: 2012

  4. 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-review › Journal article – Annual report year: 2011

  5. Submitted

    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: Research › Ph.d. thesis – Annual report year: 2013

  6. 2012
  7. 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-review › Journal article – Annual report year: 2010

  8. 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-review › Journal article – Annual report year: 2011

  9. 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-review › Journal article – Annual report year: 2011

  10. 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-review › Journal article – Annual report year: 2012

  11. 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-review › Journal article – Annual report year: 2012

  12. 2011
  13. 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.

    In: Proceedings of 11th Fully 3D Meeting. 2011.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

  14. 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-review › Conference article – Annual report year: 2011

  15. Published

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

    In: Proceedings of WSC 2011. 2011.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

  16. Published

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

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

    Publication: Research › Report – Annual report year: 2011

  17. Published

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

    In: Proceedings of WSC 2011. 2011.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

  18. Published

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

    In: Proceedings of 11th Fully 3D Meeting. 2011.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

  19. 2010
  20. 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 : DTU Informatics, Building 321, 2010. (IMM-Technical Report-2010-15).

    Publication: Research › Report – Annual report year: 2010

  21. 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-review › Journal article – Annual report year: 2010

  22. 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-review › Book – Annual report year: 2010

  23. 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-review › Journal article – Annual report year: 2010

  24. 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-review › Journal article – Annual report year: 2010

  25. Published

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

    2010. .

    Publication: Research - peer-review › Computer programme – Annual report year: 2011

  26. Published

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

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

    Publication: Research - peer-review › Book chapter – Annual report year: 2009

  27. 2009
  28. Published

    Numerical Approximation of Boundary Control for the Wave Equation - with Application to an Inverse Problem. / Mariegaard, Jesper Sandvig; Knudsen, Kim (Supervisor); Hansen, Per Christian (Supervisor); Pedersen, Michael (Supervisor).

    Kgs. Lyngby, Denmark : Technical University of Denmark (DTU), 2009. 169 p.

    Publication: Research › Ph.d. thesis – Annual report year: 2009

  29. 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-review › Journal article – Annual report year: 2009

  30. 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: Research › Paper – Annual report year: 2009

  31. Published

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

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

    Publication: Research › Book chapter – Annual report year: 2009

  32. 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-review › Journal article – Annual report year: 2009

  33. 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: Research › Paper – Annual report year: 2009

  34. Published

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

    In: Matematiske horisonter. ed. / Carsten Broder Hansen; Per Christian Hansen; Vagn Lundsgaard Hansen; Mette Minor Andersen. DTU, 2009. p. 189-201.

    Publication: Education › Book chapter – Annual report year: 2009

  35. 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: Education › Book – Annual report year: 2009

  36. Published

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

    In: SIAM Journal of Imaging Sciences, Vol. 2, No. 2, 2009, p. 593-613.

    Publication: Research - peer-review › Journal article – Annual report year: 2009

  37. 2008
  38. Published

    Computational aspects of electronic transport in nanoscale devices. / Sørensen, Hans Henrik Brandenborg; Hansen, Per Christian (Supervisor); Stokbro, Kurt (Supervisor).

    2008. (IMM-PHD-2008-195).

    Publication: Research › Ph.d. thesis – Annual report year: 2008

  39. 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-review › Conference article – Annual report year: 2008

  40. 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-review › Journal article – Annual report year: 2008

  41. 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-review › Journal article – Annual report year: 2008

  42. 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-review › Journal article – Annual report year: 2008

  43. 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: Research › Report – Annual report year: 2008

  44. 2007
  45. Published

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

    2007. 190 p.

    Publication: Research › Ph.d. thesis – Annual report year: 2007

  46. Published

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

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

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2007

  47. 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-review › Journal article – Annual report year: 2007

  48. 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-review › Journal article – Annual report year: 2007

  49. 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-review › Journal article – Annual report year: 2007

  50. 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-review › Journal article – Annual report year: 2007

  51. Published

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

    In: 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-review › Article in proceedings – Annual report year: 2007

  52. 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-review › Journal article – Annual report year: 2007

  53. Published

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

    In: EURASIP Journal on Advances in Signal Processing, Vol. 2007, 2007, p. 092953.

    Publication: Research - peer-review › Journal article – Annual report year: 2007

  54. 2006
  55. Published

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

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

    Publication: Research › Ph.d. thesis – Annual report year: 2006

  56. 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-review › Book – Annual report year: 2006

  57. 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-review › Journal article – Annual report year: 2006

  58. Published

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

    2006.

    Publication: Research - peer-review › Report – Annual report year: 2006

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