Results 111 to 120 of about 16,809 (204)

Eikonal 2.0: General Solutions for Modified Eikonal Equations

arXiv admin note: text overlap with arXiv:2212 ...
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Ray Theory-Based Transcranial Phase Correction for Intracranial Imaging: A Phantom Study

IEEE Access, 2019
Ultrasonic imaging provides a non-invasive way to diagnose brain disease. However, due to imaging degradation effects from the phase-aberration and reverberation, it is still challenging to achieve an accurate transcranial imaging.
Chen Jiang, Yunqing Li, Boyi Li, Chengcheng Liu, Feng Xu, Kailiang Xu, Dean Ta   +6 more
doaj   +1 more source

SOLVING EIKONAL EQUATION BY FIFE'S SCALING

Acta Physica Sinica, 1997
In this paper,the Fife's scaling is used to deal with the three dimensional eikonal equation.Firstly,we put the eikonal equation in the frame of the Fife scaling and obtain the expected scroll waves.Secondly,we directly use the Fife's scaling to perturb the eikonal equation and obtain the similar result.The results of two different methods are ...
null LIU SHEN-QUAN, null LU QI-SHAO
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Front Shape Similarity Measure for Shape-Oriented Sensitivity Analysis and Data Assimilation for Eikonal Equation

ESAIM: Proceedings and Surveys, 2018
We present a shape-oriented data assimilation strategy suitable for front-tracking problems through the example of wildfire. The concept of “front” is used to model, at regional scales, the burning area delimitation that moves, undergoes shape and ...
Rochoux M.C., Collin A., Zhang C., Trouvé A., Lucor D., Moireau P.   +5 more
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Group Classification of Generalised Eikonal Equations

, 2001
14 ...
Popovych, Roman O., Yehorchenko, Irina A.   +1 more
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Applications of Disaffinity Vectors to Certain Riemannian Manifolds

Mathematics
A disaffinity vector on a Riemannian manifold is a vector field whose affinity tensor vanishes. In this paper, we prove that every disaffinity vector on a compact Riemannian manifold is an incompressible vector field.
Hanan Alohali, Sharief Deshmukh, Bang-Yen Chen   +2 more
doaj   +1 more source

Inverse localization of earliest cardiac activation sites from activation maps based on the viscous Eikonal equation. [PDF]

J Math Biol, 2019
Kunisch K, Neic A, Plank G, Trautmann P.
europepmc   +1 more source

Not all that is β 0 is β-function: the DGLAP resummation and the running coupling in NLO JIMWLK

Journal of High Energy Physics
We reanalyze the origin of the large transverse logarithms associated with the QCD one loop β function coefficient in the NLO JIMWLK Hamiltonian. We show that some of these terms are not associated with the running of the QCD coupling constant but rather
Alex Kovner, Michael Lublinsky, Vladimir V. Skokov, Zichen Zhao   +3 more
doaj   +1 more source

A neural network based global traveltime function (GlobeNN). [PDF]

Sci Rep, 2023
Taufik MH, Waheed UB, Alkhalifah TA.
europepmc   +1 more source

Eikonal equations in metric spaces

Eikonal equations in metric spaces
A new notion of a viscosity solution for Eikonal equations in a general metric space is introduced. A comparison principle is established. The existence of a unique solution is shown by constructing a value function of the corresponding optimal control theory.
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