Per Christian Hansen

  1. 2016
  2. Published
  3. Published

    Simultaneous Reconstruction and Segmentation with Class-Specific Priors. / Romanov, Mikhail; Dahl, Anders Bjorholm (Main supervisor); Hansen, Per Christian (Supervisor).

    Kgs. Lyngby : Technical University of Denmark (DTU), 2016. 134 p. (DTU Compute PHD-2015; No. 397).

    Publication: ResearchPh.D. thesis – Annual report year: 2016

  4. 2015
  5. Published

    Algorithms for Electromagnetic Scattering Analysis of Electrically Large Structures. / Borries, Oscar Peter; Hansen, Per Christian (Supervisor).

    Kgs. Lyngby : Technical University of Denmark (DTU), 2015. 205 p. (DTU Compute PHD-2014; No. 354).

    Publication: ResearchPh.D. thesis – Annual report year: 2015

  6. Published

    Analysis of Electrically Large Antennas using Fast Physical Optics. / Borries, Oscar Peter; Viskum, Hans-Henrik; Meincke, Peter; Jørgensen, Erik; Hansen, Per Christian; Schmidt, Carsten H. .

    Proceedings of the 9th European Conference on Antennas and Propagation (EuCAP 2015). IEEE, 2015. p. 1-5.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2015

  7. Published

    A Parameter Choice Method for Simultaneous Reconstruction and Segmentation. / Romanov, Mikhail; Hansen, Per Christian; Dahl, Anders Bjorholm.

    Kgs. Lyngby : Technical University of Denmark (DTU), 2015. 14 p. (DTU Compute-Technical Report-2015; No. 5).

    Publication: ResearchReport – Annual report year: 2015

  8. Published

    Empirical average-case relation between undersampling and sparsity in X-ray CT. / Jørgensen, Jakob Sauer; Sidky, Emil Y.; Hansen, Per Christian; Pan, Xiaochuan.

    In: Inverse Problems and Imaging, Vol. 9, No. 2, 2015, p. 431-446.

    Publication: Research - peer-reviewJournal article – Annual report year: 2015

  9. Published

    Relaxed Simultaneous Tomographic Reconstruction and Segmentation with Class Priors for Poisson Noise. / Romanov, Mikhail; Dahl, Anders Bjorholm; Dong, Yiqiu; Hansen, Per Christian.

    Kgs. Lyngby : Technical University of Denmark (DTU), 2015. 19 p. (DTU Compute-Technical Report-2015; No. 6).

    Publication: ResearchReport – Annual report year: 2015

  10. E-pub ahead of print
  11. Published

    Tomographic Image Reconstruction Using Training Images with Matrix and Tensor Formulations. / Soltani, Sara; Hansen, Per Christian (Supervisor); Andersen, Martin Skovgaard (Supervisor).

    Kgs. Lyngby : Technical University of Denmark (DTU), 2015. 131 p. (DTU Compute PHD-2015; No. 387).

    Publication: ResearchPh.D. thesis – Annual report year: 2015

  12. 2014
  13. Published

    A computationally efficient tool for assessing the depth resolution in large-scale potential-field inversion. / Paoletti, Valeria; Hansen, Per Christian; Hansen, Mads Friis; Fedi, Maurizio.

    In: Geophysics, Vol. 79, No. 4, 2014, p. A33-A38.

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

  14. 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

  15. Published

    Adaptive grouping for the higher-order multilevel fast multipole method. / Borries, Oscar Peter; Jørgensen, Erik; Meincke, Peter; Hansen, Per Christian.

    In: Microwave & Optical Technology Letters, Vol. 56, No. 10, 2014, p. 2451-2456.

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

  16. 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

  17. Published

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

    In: Numerical Algorithms, Vol. 67, No. 1, 2014, p. 121.

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

  18. 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

  19. Published

    Multicore Performance of Block Algebraic Iterative Reconstruction Methods. / Sørensen, Hans Henrik B.; Hansen, Per Christian.

    In: S I A M Journal on Scientific Computing, Vol. 36, No. 5, 2014, p. C524-C546.

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

  20. 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

  21. Published

    "Plug-and-play" edge-preserving regularization. / Chen, Donghui; Kilmer, Misha E.; Hansen, Per Christian.

    In: Electronic Transactions on Numerical Analysis, Vol. 41, 2014, p. 465-477.

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

  22. Published
  23. 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

  24. Published

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

    In: BIT Numerical Mathematics, Vol. 54, No. 3, 2014, p. 649-671.

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

  25. 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

  26. 2013
  27. 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

  28. 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

  29. 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

  30. 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

  31. 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

  32. 2012
  33. 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

  34. 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

  35. 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

  36. Published

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

    In: arXiv, 2012, p. 1-20.

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

  37. 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

  38. 2011
  39. 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

  40. 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

  41. 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

  42. 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

  43. 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

  44. 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

  45. 2010
  46. 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

  47. 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

  48. 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

  49. 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

  50. 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

  51. 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

  52. 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

  53. 2009
  54. Published
  55. 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

  56. 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

  57. 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

  58. 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

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