Stanislav Harizanov

Associate professor, IICT-BAS

• Date of Birth: 23 October 1983
• Nationality: Bulgarian

Address

Acad. G. Bonchev Str., bl. 25A
1113 Sofia, Bulgaria
Email: sharizanov@parallel.bas.bg
Phone: (+359-2) 979 67 94 Fax: (+359-2) 8 707 273

Education

• March 2008 - October 2011 - PhD in Mathematics, Jacobs University Bremen, Germany
PhD thesis Analysis of nonlinear subdivision and multi-scale transforms
• September 2005 - February 2008 - MSc in Mathematics, Jacobs University Bremen, Germany
Master's Thesis Stability of nonlinear subdivision schemes and multiresolutions
• October 2001 - June 2005 - BSc in Mathematics, Faculty of Mathematics and Informatics, Sofia University

Research Interest

• Nonlinear Subdivision; Normal multi-scale transforms for curves and surfaces
• Numerical methods for fractional-in-space elliptic problems; Best Uniform Rational Approximation
• Image and Signal Processing: Segmentation, Denoising, Deblurring, and Feature Extraction
• Mathematical Modeling; Constrained Optimization
• Primal-Dual Algorithms and their Parallel implementation

Foreign languages

• English
• Russian
• German

List of Publications

Journal Papers and Conference Proceedings

1. S. Harizanov, S. Margenov, Comparison analysis on two numerical solvers for fractional Laplace problems, Advanced Computing in Industrial Mathematics. SCI 793, 163-176, Springer Verlag, 2019.
2. D. Toneva, S. Nikolova, S. Harizanov, I. Georgiev, D. Zlatareva, V. Hadjidekov, A. Dandov, N. Lazarov, Sex estimation by size and shape of foramen magnum based on CT imaging, Legal Medicine 35, 50-60, 2018.
3. S. Harizanov, S. Margenov, Positive approximations of the inverse of fractional powers of SPD M-matrices, Control Systems and Mathematical Methods in Economics. LNEMS 687, 147-163, Springer International Publishing AG, 2018.
4. S. Harizanov, R. Lazarov, S. Margenov, P. Marinov, Y. Vutov, Optimal solvers for linear systems with fractional powers of sparse SPD matrices, Numer Linear Algebra Appl. e2167, 2018.
5. D. Toneva, S. Nikolova, I. Georgiev, S. Harizanov, D. Zlateva, V. Hadjidekov, N. Lazarov, Facial soft tissue thicknesses in Bulgarian adults: relation to sex, body mass index and bilateral asymmetry, Folia Morphologica (Poland) 77(3), 570-582, 2018.
6. S. Harizanov, J. de Dios Pont, S. Ståhl, D. Wenzel, Noise Removal and Feature Extraction of 2D CT Radiographic Images, Advanced Computing in Industrial Mathematics. SCI 728, 57-70, Springer, Cham, 2018.
7. S. Nikolova, D. Toneva, I. Georgiev, S. Harizanov, D. Zlateva, V. Hadjidekov, N. Lazarov, A CT-study of the Cranial Suture Morphology and its Reorganization during the Obliteration, Collegium Antropologicum 42(2), 125-131, 2017.
8. S. Harizanov, I. Lirkov, K. Georgiev, M. Paprzycki, M. Ganzha, Performance analysis of a parallel algorithm for restoring large-scale CT images, Journal of Computational and Applied Mathematics 310, 104-114, 2017.
9. S. Harizanov, S. Margenov, P. Marinov, Y. Vutov, Volume constrained 2-phase segmentation method utilizing a linear system solver based on the best uniform polynomial approximation of x^{-1/2}, Journal of Computational and Applied Mathematics 310, 115-128, 2017.
10. S. Harizanov, I. Georgiev, Fast Algorithm for Optimal Graph-Laplacian Based 3D Image Segmentation, AIP Conf. Proc. 1773, 110006, 2016.
11. S. Harizanov, Deblurring Poissonian Images via Multi-constraint Optimization, Innovative Approaches and Solutions in Advanced Intelligent Systems. SCI 648, 201-217, Springer International Publishing Switzerland, 2016.
12. S. Harizanov, S. Margenov, L. Zikatanov, Fast Constrained Image Segmentation Using Optimal Spanning Trees, Large-Scale Scientific Computing (LSSC 2015). LNCS 9374, 15-29, Springer International Publishing Switzerland, 2015.
13. I. Georgiev, S. Harizanov, Y. Vutov, Supervised 2-Phase Segmentation of Porous Media with Known Porosity, Large-Scale Scientific Computing (LSSC 2015). LNCS 9374, 343-351, Springer International Publishing Switzerland, 2015.
14. S. Stoykov, S. Harizanov, S. Margenov, Space discretization by B-Splines on discontinuous problems in structural mechanics, Proceedings of the 7th Balkan Conference in Informatics (BCI 2015). ISBN: 978-1-4503-3335-1, Paper Id: 31, 7 pages, 2015.
15. S. Harizanov, J.-C. Pesquet, G. Steid, Epigraphical projection for solving least squares Anscombe transformed constrained optimization problems, A. Kuijper et al., (eds.), Scale-Space and Variational Methods in Computer Vision (SSVM 2013). LNCS 7893, 125-136, Springer-Verlag: Berlin, 2013.
16. S. Harizanov, Globally convergent adaptive Normal multi-scale transforms, J.-D. Boissonnat et al. (eds.), Curves and Surfaces - 7th International Conference, Avignon, France. LNCS 6920, 296-310, Springer, 2012.
17. S. Harizanov, P. Oswald, T. Shingel, Normal multi-scale transforms for curves, Foundations of Computational Mathematics 11(6), 617-656, 2011.
18. S. Harizanov, P. Oswald, Stability of nonlinear subdivision and multiscale transforms, Constructive Approximation 31, 359-393, 2010.

Extended Abstracts and Short Communications

1. S. Harizanov, Digital image processing with application in industrial computed tomography, Математика и математическо образование, 59-67, 2018. ISSN:1313-3330
2. S. Harizanov, I. Lirkov, I. Georgiev, Restoration of Low-dose CT Radiographic Images, Short Communications "IWCIA'17", 17-21, 2017. ISBN:978-954-8852-74-6
3. S. Harizanov, I. Lirkov, I. Georgiev, Al. Skordev, Denoising and segmentation of digital radiographic images, Scientific Proceedings "NDT days 2016", 438-440, 2016. ISSN:1310-3946
4. S. Harizanov, I. Lirkov, I. Georgiev, Denoising 2D CT radiographic images, Proceedings of the International Conference on Numerical Methods for Scientific Computations and Advanced Applications, 31-35, 2016. ISBN:978-619-7223-18-7
5. S. Harizanov, I. Georgiev, S. Margenov, Supervised 3D-Surface Fitting, BGSIAM'15 Proceedings, 23-24, 2015. ISSN:1313-3357
6. S. Harizanov, Stability of nonlinear multiresolution analysis, Proceedings in Applied Mathematics and Mechanics (PAMM) 8(1), 10933-10934, 2008.

Industrial Mathematics

1. S. Harizanov, D. Dimov, N. Naidenov, S. Kostadinova, Multi-frame Denoising of Still Images, 120th European Study Group with Industry (ESGI'120), Problems & Final Reports, 31-53, 2016. ISBN:978-619-7223-31-6
2. D. Wenzel, J. de Dios Pont, S. Stahl, V. Khyzhniak, Z. Nedyalkova, S. Harizanov (instructor), Denoising and feature extraction of 2D CT radiographic images, ECMI Modelling Week 2016, Problems & Final Reports, 23 pages, 2016.
3. V. Bodurov, D. Dimov, G. Evtimov, I. Georgiev, S. Harizanov, G. Nikolov, V. Pirinski, The 2D/3D Best-Fit Problem, 113th European Study Group with Industry (ESGI'113), Problems & Final Reports, 62-73, 2015. ISBN:978-619-7223-12-5

Conferences / Workshops

7th CMAPT Workshop (Computational Mathematics and APproximation Theory), Sozopol (Bulgaria), September 2-8, 2018.

9th International Conference on Numerical Methods and Applications (NM&A'18), Borovets (Bulgaria), August 20-24, 2018.

8th International Conference Computational Methods in Applied Mathematics (CMAM-8), Minsk (Belarus), July 2-6, 2018.

International Conference on "Numerical Methods for Scientific Computations and Advanced Applications" NMSCAA'18, Hissarya (Bulgaria), May 28-31, 2018.

47th Spring Conference of the Union of Bulgarian Mathematicians, Borovets (Bulgaria), April 2-6, 2018.

12th Annual Meeting of the Bulgarian Section of SIAM, Sofia (Bulgaria), December 20-22, 2017.

6th CMAPT Workshop (Computational Mathematics and AProximation Theory), Linz (Austria), September 5-9, 2017.

2nd International Conference Mathematics Days in Sofia (MDS2017), Sofia (Bulgaria), July 10-14, 2017.

18th International Workshop on Combinatorial Image Analysis (IWCIA'17), Plovdiv (Bulgaria), June 19-21, 2017.

International Conference NDT Days 2017, Sozopol (Bulgaria), June 12-16, 2017.

11th International Conference on Large-Scale Scientific Computations, Sozopol (Bulgaria), June 5-9, 2017.

11th Annual Meeting of the Bulgarian Section of SIAM, Sofia (Bulgaria), December 20-22, 2016.

Workshop on Approximation Theory, CAGD, Numerical Analysis, and Symbolic Computation , Sofia (Bulgaria), September 6-11, 2016.

120th European Study Group with Industry , Sofia (Bulgaria), July 25-29, 2016.

The ECMI Modelling Week (instructor), Sofia (Bulgaria), July 17-24, 2016.

8th Conference of the Euro-American Consortium for Promoting the "Application of Mathematics in Technical and Natural Sciences" AMiTaNS'16, Albena (Bulgaria), June 22-27, 2016.

International Conference on Constructive Theory of Functions, Sozopol (Bulgaria), June 11-17, 2016.

Second Workshop on Advanced Techniques in Non-Destructive Testing, Sozopol (Bulgaria), June 8, 2016.

International Conference on "Numerical Methods for Scientific Computations and Advanced Applications" NMSCAA'16, Hissarya (Bulgaria), May 29 - June 02, 2016.

International Workshop on Characterization of Material Properties based on X-ray Tomography, Panagyurishte (Bulgaria), April 20-22, 2016.

10th Annual Meeting of the Bulgarian Section of SIAM , Sofia (Bulgaria), December 21-22, 2015.

The International Conference Advanced Computing for Innovation (AComIn 2015), Sofia (Bulgaria), November 10-11, 2015.

113th European Study Group with Industry (ESGI'113), Sofia (Bulgaria), September 14-18, 2015.

10th International Conference on Large-Scale Scientific Computations (LSSC 2015), Sozopol (Bulgaria), June 8-12, 2015.

XXIII Congress on Differential Equations and Applications / XIII Congress on Applied Mathematics, Castellon (Spain), September 9-13, 2013.

International conference on Constructive Theory of Functions, Sozopol (Bulgaria), June 9-15, 2013.

4th International Conference on Scale Space and Variational Methods in Computer Vision, Schloss Seggau (Graz region, Austria), June 2-6, 2013.

3rd Dolomites Workshop on Constructive Approximation and Applications, Alba di Canazei (Trento, Italy), September 9-14, 2012.

8th International Conference on Mathematical Methods for Curves and Surfaces, Oslo, Norway, June 28 - July 3, 2012.

International Symposium in Approximation Theory, Vanderbuilt University, Nashville, TN, USA, May 17-21, 2011.

Workshop on Compressed Sensing, Sparsity and Inverse Problems, TU Braunschweig, Germany, September 6-7, 2010.

WE-Heraeus workshop "Biomedical Modeling and Visualization", Jacobs University Bremen, Germany, August 12-20, 2010.

New Trends in Harmonic and Complex Analysis, Jacobs University Bremen, Germany, June 29 - July 3, 2010.

7th International Conference on Curves and Surfaces, Avignon, France, June 24-30, 2010.

Workshop on Nonlinear Approximation, Philipps-University, Marburg, Germany, May 27-28, 2010.

Research workshop on Subdivision and Refinability, Pontignano (SI), Italy, October 12-15, 2009.

79th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Bremen, Germany, March 31 - April 4, 2008.