Comparison of automatic methods to detect sunspots in the Coimbra Observatory spectroheliograms
S Carvalho, S Gomes, T Barata, A Lourenço… - Astronomy and …, 2020 - Elsevier
Abstract The Astronomical Observatory of the University of Coimbra has a huge collection of
solar images, acquired daily since 1926. From the beginning, only spectroheliograms in the …
solar images, acquired daily since 1926. From the beginning, only spectroheliograms in the …
Evaluative study of PSO/snake hybrid algorithm and gradient path labeling for calculating solar differential rotation
PSO/Snake hybrid algorithm is a merge of particle swarm optimization (PSO), a successful
population based optimization technique, and the Snake model, a specialized image …
population based optimization technique, and the Snake model, a specialized image …
Solar rotation speed by detecting and tracking of Coronal Bright Points
AMF Coelho - 2017 - search.proquest.com
Abstract Coronal Bright Points are one of many Solar manifestations that provide scientists
evi-dences of its activity and are usually recognized by being small light dots, like scattered …
evi-dences of its activity and are usually recognized by being small light dots, like scattered …
Stable and Convergent Numerical Methods for Nonlinear Parabolic Systems: Application to Sunspots
SJFSR Carvalho - 2021 - estudogeral.uc.pt
The computation of the magnetic field in the umbra-the darkest part of a sunspot, was the
main motivation of this work. After several simplifications of the physical scenario to …
main motivation of this work. After several simplifications of the physical scenario to …
Stable and Convergent Numerical Methods for Nonlinear Parabolic Systems: Application to Sunspots
SJF dos Santos Rodrigues - 2021 - search.proquest.com
The computation of the magnetic field in the umbra-the darkest part of a sunspot, was the
main motivation of this work. After several simplifications of the physical scenario to …
main motivation of this work. After several simplifications of the physical scenario to …
A New Class of Scaling Matrices for Scaled Trust Region Algorithms
A Ayanzadeh, S Yazdanian, E Shahamatnia - arXiv preprint arXiv …, 2019 - arxiv.org
A new class of affine scaling matrices for the interior point Newton-type methods is
considered to solve the nonlinear systems with simple bounds. We review the essential …
considered to solve the nonlinear systems with simple bounds. We review the essential …