Results 141 to 150 of about 2,075 (173)
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Stellar Mesh Simplification Using Probabilistic Optimization
Computer Graphics Forum, 2004AbstractThis paper proposes the stellar mesh simplification method, a fast implementation of the Four‐Face Cluster (FFC) algorithm. In this method, a probabilistic optimization heuristic substitutes the priority queue of the original method, which results in a 40% faster algorithm with the same order of distortion. It extends naturally to a progressive
Antônio W. Vieira +4 more
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Optimal design of relativistic stellar models
Physica Scripta, 2023Abstract A new approach to construct relativistic stellar models is presented. The problem is formulated as an optimal control problem, with an objective function to be optimized. As illustration, the problem is formulated and solved, with the rest mass as the objective function to be minimized, in three cases.
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Optimization techniques for modular stellarator coils
Nuclear Fusion, 1982Introduction of a non-sinusoidal deformation can enhance the efficacy of modular coils for generating magnetic fields with a built-in rotational transform. Techniques are developed that provide an understanding of how specific deformations affect the harmonic content of the magnetic field and thus the properties of the vacuum configuration. A procedure
T.K. Chu +4 more
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Ripple transport in ‘transport-optimized’ stellarators
Journal of Plasma Physics, 1987Transport in ‘transport-optimized’ stellarators at low collision frequencies has been studied using a numerical method of solution of the bounce-averaged Fokker–Planck equation which describes both ripple-trapped and non-ripple-trapped particles in a stellarator.
W. N. G. Hitchon, H. E. Mynick
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Stellar Wind-Inspired Optimization
This paper proposes a heuristic optimization algorithm based on the interaction between stellar winds and planets. This algorithm simulates the effects of global stellar wind exploration, magnetospheric attraction, and magnetotail perturbations on the planet, mapping these processes into an optimization problem and forming a unique multi-mechanism ...openaire +1 more source
Some results of stellarator optimization
2015The collisionless confinement of all reflected particles with orbits that star within the inner half of the plasma of a stellarator with the poloidal direction of the contours of the magnetic field strenght B is shown computationally to be possible. It is also demonstrated that the confinement achieved is well compatible with the fulfilment of Mercier ...
Mikhailov, M.I. +17 more
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Stellar Flare Optimization Algorithm
Various physical phenomena in nature provide a wealth of heuristic inspiration for optimization algorithms. This paper proposes a new heuristic optimization algorithm based on the stellar flare phenomenon, the Stellar Flare Optimization Algorithm (SFOA). This algorithm achieves efficient search for complex optimization problems by simulating the suddenopenaire +1 more source
SIMSOPT: A flexible framework for stellarator optimization
Journal of Open Source Software, 2021Matt Landreman +2 more
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Stellar evolution-inspired optimization algorithm
This paper proposes an optimization algorithm inspired by the stages of stellar evolution. This algorithm is based on the evolution of stars from protostars, main sequence stars, red giants, supernovae, and remnants. It combines energy conservation, core-shell synergy, remnant memory, and an adjustable gravitational mechanism to form a multi-stage ...openaire +1 more source
Single-stage gradient-based stellarator coil design: Optimization for near-axis quasi-symmetry
Journal of Computational Physics, 2022Florian Wechsung +2 more
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