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Svilen S. Valtchev

Institutional Address

Instituto Politécnico de Leiria
Escola Superior de Tecnologia e Gestão (ESTG)
Campus 2, Morro do Lena - Alto do Vieiro
Apartado 4163, 2411-901 LEIRIA

Phone: | Email: ssv@math.ist.utl.pt

Position

Assistant Professor, Instituto Politécnico de Leiria

Area

Applied and Numerical Analysis

Principal Area

Numerical Methods for Differential Equations

Other Area

Meshless (Mesh-free) methods

Qualifications

PhD in Mathematics (Applied and Numerical Analysis), Instituto Superior Tecnico, University of Lisbon, Portugal (2008)
Degree (5 years) in Applied Mathematics and Computer Science, Instituto Superior Tecnico, University of Lisbon, Portugal (2002)

ORCID Author ID: 0000-0002-3474-2788

SCOPUS Author ID: 8361079200

Papers in International Journals

Fracas, Paolo; Zondervan, Edwin; Franke, Meik; Camarda, Kyle; Valtchev, Stanimir; Valtchev, Svilen S. (2022) Techno-Economic Optimization Study of Interconnected Heat and Power Multi-Microgrids with a Novel Nature-Inspired Evolutionary Method . Electronics: 11(19), 3147.

Alves, Carlos J. S.; Martins, Nuno F. M.; Valtchev, Svilen S. (2021) Domain decomposition methods with fundamental solutions for Helmholtz problems with discontinuous source terms . Computers and Mathematics with Applications: 88, 16-32.

Alves, Carlos J. S.; Antunes, Pedro R. S.; Martins, Nuno F. M.; Valtchev, Svilen S. (2020) Solving boundary value problems on manifolds with a plane waves method . Applied Mathematics Letters: 107, 106426.

Alves, Carlos J. S.; Martins, Nuno F. M.; Valtchev, Svilen S. (2018) Trefftz methods with cracklets and their relation to BEM and MFS . Engineering Analysis and Boundary Elements: 95, 93-104.

Alves, Carlos J. S.; Valtchev, Svilen S. (2018) On the application of the method of fundamental solutions to boundary value problems with jump discontinuities . Applied Mathematics and Computation: 320, 61–74.

Valtchev, Svilen S. (2018) A meshfree method with plane waves for elastic wave propagation problems . Engineering Analysis with Boundary Elements: 92, 64-72.

Alves, Carlos J. S.; Martins, Nuno F. M.; Valtchev, Svilen S. (2017) Extending the method of fundamental solutions to non-homogeneous elastic wave problems . Applied Numerical Mathematics: 115, 299-313.

Antunes, Pedro R. S.; Valtchev, Svilen S. (2010) A Meshfree Numerical Method for Acoustic Wave Propagation Problems in Planar Domains with Corners and Cracks . Journal of Computational and Applied Mathematics: 234(9), 2646-2662.

Valtchev, Svilen S. ; Roberty, Nilson C. (2008) A Time-Marching MFS Scheme for Heat Conduction Problems . Engineering Analysis with Boundary Elements: 32(6), 480-493.

Diogo, Teresa; Lima, Pedro M.; Ford, Neville J.; Valtchev, Svilen S. (2006) Numerical Methods for a Volterra Integral Equation with Non-smooth Solutions . Journal of Computational and Applied Mathematics: 189(1-2), 412–423.

Alves, Carlos J. S.; Valtchev, Svilen S. (2005) Numerical Comparison of Two Meshfree Methods for Acoustic Wave Scattering . Engineering Analysis with Boundary Elements: 29(4), 371-382.

Papers or Chapters in Edited Books

Martins, Nuno F. M.; Valtchev, Svilen S. (2025) A Meshfree Method of Particular Solutions with Neuber-Papkovich Potentials for Nonhomogeneous Elastodynamic Problems . Numerical Mathematics and Advanced Applications, ENUMATH 2023 (Ed. Sequeira, A., et al.). Lecture Notes in Computational Science and Engineering, Vol. 154, Springer Cham, 162-171.

Valtchev, Stanimir S.; Valtchev, Svilen S. (2018) Control for the Contactless Series Resonant Energy Converter . Emerging Capabilities and Applications of Wireless Power Transfer, 102-140.

Valtchev, Svilen S. ; Alves, Carlos J. S. (2017) Extending the method of fundamental solutions to potential problems with discontinuous boundary conditions . Advances in Boundary Element & Meshless Techniques XVIII (Ed: L Marin, M H Aliabadi), 132-137.

Madeiros, Rui; Valtchev, Stanimir S.; Valtchev, Svilen S. (2012) The efficient and stable charging of electric vehicle batteries: simplified instantaneous regulation . Technological Innovation for Value Creation: IFIP Advances in Information and Communication Technology, IFIP Advances in Information and Communication Technology, Springer Berlin Heidelberg: 372, 363-374.

Alves, Carlos J. S.; Valtchev, Svilen S. (2007) A Kansa Type Method Using Fundamental Solutions Applied to Elliptic PDEs . Advances in Meshfree Techniques (Ed. Leitao, Vma et Al.). Computational Methods in Applied Sciences: 5, 241-256.

Alves, Carlos J. S.; Valtchev, Svilen S. (2006) Comparison between meshfree and boundary element methods applied to BVPs in domains with corners . III European Conference on Computational Mechanics.

Communications in Conference Proceedings

Valtchev, Svilen S. ; Marin, Liviu (2023) A Meshfree Method with Overlapping Domain Decomposition for Elliptic Boundary Value Problems . AIP Conf. Proc. of ICNAAM 2023: 3315.

Valtchev, Svilen S. ; Martins, Nuno F. M. (2021) Meshfree approximate solution of the Cauchy-Navier equations of elastodynamics . Proceedings of the 3nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA).

Valtchev, Svilen S. (2020) A meshfree method with domain decomposition for Helmholtz boundary value problems . Proceedings of the 2nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA), 139--144.

Valtchev, Svilen S. ; Alves, Carlos J. S. (2017) Applying the Method of Fundamental Solutions to Harmonic Problems with Singular Boundary Conditions . AIP Conf. Proc. of ICNAAM 2016: 1836, 560020.

Mudrov, M.; Zyuzev, A.; Konstantin, N.; Valtchev, Stanimir S.; Valtchev, Svilen S. (2017) Hardware-in-the-loop system numerical methods evaluation based on brush DC-motor model . Proceedings of the International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) and 2017 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP), 428-433.

Valtchev, Svilen S. ; Alves, Carlos J. S.; Martins, Nuno F. M. (2014) A Meshfree Method with Fundamental Solutions for Inhomogeneous Elastic Wave Problems . Proceedings of the 6th International Conference on Numerical Analysis (NumAn 2014), September 2-5, Chania,Greece.

Valtchev, Stanimir S.; Valtchev, Svilen S. (2012) Experimental study of the energy portions control in series resonant converter . Proceedings of the 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), 827-832.

Valtchev, Stanimir S.; Madeiros, Rui; Valtchev, Svilen S. ; Klaassens, Ben (2011) An Instantaneous Regulation for the Wired and Wireless Super-Resonant Converters . Proceedings of the 33rd International Telecommunications Energy Conference (INTELEC), 1-8.

Valtchev, Svilen S. (2010) Asymptotic Analysis of the Method of Fundamental Solutions for Acoustic Wave Propagation . AIP Conf. Proc. of ICNAAM 2010: 1281, 1179-1182.

Valtchev, Stanimir S.; Valtchev, Svilen S. (2010) Improved strategy for an instantaneous super-resonant converter regulation . Proceedings of the 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM): 5510484, 631-638.

Valtchev, Stanimir S.; Miletiev, R.; Arnaoudov, Rumen; Valtchev, Svilen S. (2009) Control strategy for efficient operation of super-resonant SLSR (contactless) converters . Procieedings of the XLIV International Scientific Conference on Information, Communication and Energy Systems and Technologies, 527-530.

Valtchev, Svilen S. (2008) A mesh free numerical method for acoustic wave propagation problems in planar domains with corners and cracks . Proceedings of the IWANASP.

Alves, Carlos J. S.; Valtchev, Svilen S. (2007) The plane waves method as an asymptotic MFS . Proceedings of the MFS2007.

Valtchev, Svilen S. ; Roberty, Nilson C. (2007) A hybrid FDM-MFS method for the numerical solution of heat transfer problems . Proceedings of the ECCOMAS thematic conference on Meshless methods.

Alves, Carlos J. S.; Valtchev, Svilen S. (2005) A Kansa type method using fundamental solutions applied to second order elliptic PDEs . Proceedings of the ICCES'05.

Alves, Carlos J. S.; Valtchev, Svilen S. (2005) A Kansa type method using fundamental solutions applied to elliptic PDEs . Proceedings of the ECCOMAS thematic conference on Meshless methods.

Alves, Carlos J. S.; Valtchev, Svilen S. (2004) Resolucao numerica de problemas de difraccao acustica nao homogeneos atraves de dois metodos sem malha . Proceedings of the VIIIth Congress on Applied and Computational Mechanics & VI Congresso de Metodos Numericos en Ingeniaria.

Alves, Carlos J. S.; Valtchev, Svilen S. (2003) Resolucao numerica de problemas de difraccao de ondas acusticas usando resultados de densidade de ondas planas e de solucoes fundamentais . Proceedings of the VIIth Congress on Applied and Computational Mechanics, 2139–2148.

Alves, Carlos J. S.; Valtchev, Svilen S. (2003) Numerical simulations of acoustic wave scattering using a meshfree plane wave method . Proceedings of the International Workshop on Meshfree Methods, Instituto Superior Tecnico, Portugal, 215-220.

Diogo, Teresa; Valtchev, Svilen S. ; Lima, Pedro M. (2003) Numerical solution of a singular Volterra integral equation by piecewise polynomial collocation . Proceedings of the IXth International Conference on Enhancement and Promotion of Computational Methods in Engineering and Science (EPMESC IX).

Diogo, Teresa; Lima, Pedro M.; Valtchev, Svilen S. (2003) Numerical methods for a non-uniquely solvable Volterra integral equation . Proceedings of the XXIVth Iberian Latin-American Congress on Computational Methods in Engineering (XXIV CILAMCE).

Diogo, Teresa; Valtchev, Svilen S. (2003) Collocation methods for a Volterra integral equation with multiple solutions . Fundamental Physical- Mathematical Problems and Modelling of Technological Systems: 6.

Thesis

Valtchev, Svilen S. (2008) Numerical analysis of methods with fundamental solutions for acoustic and elastic wave propagation problems . PhD Thesis, Instituto Superior Tecnico, University of Lisbon.

Valtchev, Svilen S. (2002) Metodos numericos para uma equacao integral de Volterra com infinitas solucoes . Diploma Thesis, Instituto Superior Tecnico, University of Lisbon.

Edition of Books

Sequeira, Adélia; Silvestre, Ana Leonor; Valtchev, Svilen S. ; Janela, João (2025) Numerical Mathematics and Advanced Applications, ENUMATH 2023, Volume 1 . Springer series: Lecture Notes in Computational Science and Engineering, Vol. 153, Springer Cham, ISBN 978-3-031-86172-7.

Sequeira, Adélia; Silvestre, Ana Leonor; Valtchev, Svilen S. ; Janela, João (2025) Numerical Mathematics and Advanced Applications, ENUMATH 2023, Volume 2 . Springer series: Lecture Notes in Computational Science and Engineering, Vol. 154, Springer Cham, ISBN 978-3-031-86168-0.

Alves, Carlos J. S.; Karageorghis, Andreas; Leitão, Vitor M. A.; Valtchev, Svilen S. (2020) Advances in Trefftz methods and their applications . Springer series: SEMA SIMAI, Vol. 23, Springer Cham, ISBN 978-3-030-52803-4.

Conferences

3nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (11/2021) Lipetsk, Russia (Scientific Committee, Invited Speaker)

2nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (11/11/2020) Lipetsk, Russia (Scientific Committee, Invited Speaker)

International Conference on Trefftz and MFS Methods (29/07/2019) Lisbon, Portugal (Organizing Committee, Scientific Committee, Editorial Board)

155th European Study Group with Industry (2019) (01/07/2019) Leiria (Organizing Committee, Scientific Committee, Editorial Board)

17th International Conference on Power Electronics and Motion Control (2016) (25/09/2016) Varna, Bulgaria (Organizing Committee)

ECOMMAS Thematic Conference on Meshless Methods (2005) (11/07/2005) Lisbon, Portugal (Organizing Committee)

(01/01/1970) (Organizing Committee, Editorial Board, Contributed Talk)

European Conference on Numerical Mathematics and Advanced Applications (04/09/2023) Lisbon, Portugal (Organizing Committee, Editorial Board)