Results 111 to 120 of about 5,484 (295)
Short Note A second-order fast marching eikonal solver
, 2008 The fast marching method (Sethian, 1996) is widely used for solving the eikonal equation in Cartesian coordinates. The method’s principal advantages are: stability, computational efficiency, and algorithmic simplicity.
Sergey Fomel, James Rickett
core
, 2016 Solving the eikonal equation allows to compute a monotone front propagation of anisotropic nature and is thus a widely applied technique in different areas of science and engineering.
Weinbub, Josef, Hössinger, Andreas
core +1 more source
Cálculo de trayectorias para vehículos autónomos marinos (USV) utilizando el método Fast Marching Square sometido a campo vectorial [PDF]
, 2016 [Resumen] La planificación de trayectorias fue en el pasado y es actualmente un campo de estudio con amplias posibilidades y muy investigado. Para resolver los problemas planteados existen diferentes aproximaciones y algoritmos, entre los cuales el Fast
Moreno, Luis +2 more
core +1 more source
Dizhen xuebao快速准确地计算走时和射线路径是实现地震成像和反演的关键。在各向异性介质中，地震波的传播速度会随传播方向的变化而变化，这使得求解各向异性条件程函方程时，相速度的精确估计和计算变得非常复杂和困难，进而影响各向异性介质中走时和射线路径的计算精度和效率。为此，提出了一种基于相速度预测的射线追踪方法，该方法根据波的传播规律以及斯奈尔方程，推导出一种相速度预测公式，解决了各向异性条件程函方程中相速度求解困难的问题，实现了快速稳定的射线追踪。数值算例表明，本文所提出的改进算法明显提高了走时计算精度 ...
Zhiyu Zhang, Xue Dong, Yiqun Zhao
doaj +1 more source
Food Prices and Inflation Expectations in New Zealand
Agribusiness, EarlyView.ABSTRACT Food prices are conspicuous, and spending on food constitutes a considerable share of household expenditure. In this study, we use partially identified Bayesian structural vector autoregression models to analyze the effects of food price shocks on core inflation and 1‐ and 5‐year inflation expectations in New Zealand.
Puneet Vatsa +2 more
wiley +1 more source
Fast convergence layout algorithm for drawing graphs in marching-graph [PDF]
, 2008 Marching-Graph is a new visualization that integrates the graph metaphor and the spatial metaphor into a single visualization. It provides users with highly interactive maps for accessing the logical structures of information that has the geographical ...
Huang, ML, Quan, W
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Fast marching method-based bent-ray tracing for three-dimensional velocity imaging in mines
Rock Mechanics BulletinThree-dimensional (3D) seismic velocity imaging is crucial for understanding rock mass stress and structures in mining. Conventional straight-ray tomography suffers from ray-path mismatches with true wavefield propagation in complex media, leading to ...
Jie Yang +4 more
doaj +1 more source
Current Directions in Biomedical Engineering, 2015 Diagnosis of atrial flutter caused by ablation of atrial fibrillation is complex due to ablation scars. This paper presents an approach to replicate the clinically measured flutter circuit in a dynamic computer model.
Trächtler J. +6 more
doaj +1 more source
Bona Fide Intersegmental Plane Hepatectomy Along the Glissonean Branches (BIPHG)
Annals of Gastroenterological Surgery, EarlyView.ABSTRACT This review traces the author's personal journey over three decades in the evolution of liver resection techniques, culminating in the proposal of the Bona Fide Intersegmental Plane Hepatectomy Along Glissonean Branches (BIPHG). Beginning with pioneering experiences in laparoscopic and robotic liver surgeries, the author highlights key ...
Go Wakabayashi, Taiga Wakabayashi
wiley +1 more source
CHARACTERISTIC FAST MARCHING METHOD FOR MONOTONICALLY PROPAGATING FRONTS IN A MOVING MEDIUM
, 2013 International audienceThe fast marching method is computationally efficient in approximating the viscosity solution of the eikonal equation in the case of unidirectional wavefront propagation through a medium at rest.
Coulouvrat, F. +5 more
core +1 more source