Results 61 to 70 of about 2,533,249 (165)

An Image Segmentation Method Based on Improved Regularized Level Set Model

open access: yesApplied Sciences, 2018
When the level set algorithm is used to segment an image, the level set function must be initialized periodically to ensure that it remains a signed distance function (SDF).
Lin Sun   +3 more
doaj   +1 more source

Topology optimization for multi-material structures based on the level set method

open access: yesNihon Kikai Gakkai ronbunshu, 2017
Topology optimization is the most flexible type of structural optimization method. This method has been applied in a variety of physics problems dealing with a multitude of design problems.
Naoki KISHIMOTO   +5 more
doaj   +1 more source

An Improved Conservative Hybrid Method with Adaptive Mesh Refinement for Passive-Scalar Transport on Deforming Interfaces

open access: yesMathematics
This paper presents an improved hybrid Eulerian–Lagrangian framework, which has been augmented with an adaptive mesh refinement technique, for simulating passive scalar transport on deforming interfaces. We capture interface deformation using an Eulerian
Yu Fan, Chunyan Liu
doaj   +1 more source

Eikonal Boundary Condition for Level Set Method

open access: yes
In this paper, we propose to use the eikonal equation as a boundary condition when advective or normal flow equations in the level set formulation are solved numerically on polyhedral meshes in the three-dimensional domain. Since the level set method can use a signed distance function as an initial condition, the eikonal equation on the boundary is a ...
Hahn, Jooyoung   +2 more
openaire   +2 more sources

Properties and Model of Pore-Scale Methane Displacing Water in Hydrate-Bearing Sediments

open access: yesJournal of Marine Science and Engineering
The flow characteristics of methane and water in sedimentary layers are important factors that affect the beneficial exploitation of marine hydrates. To study the influencing factors of methane drive-off water processes in porous media, we constructed ...
Dongfeng Ge   +7 more
doaj   +1 more source

A Continuous Skeletonization Method Based on Level Sets.

open access: yes, 2002
A robust and efficient method in 2D and 3D for the calculation of skeletons for arbitrary objects is presented. The method is based on the calculation of the distance function with respect to the object boundary. This is combined, in a post processing step, with a new indicator to identify the skeleton, which coincides with the singularity set of the ...
Rumpf, Martin, Telea, Alexandru
openaire   +3 more sources

Isogeometric Topology Optimization Based on Topological Derivatives

open access: yesComputer Assisted Methods in Engineering and Science
Topology optimization is a valuable tool in engineering, facilitating the design of optimized structures. However, topological changes often require a remeshing step, which can become challenging.
Guilherme Henrique Teixeira   +3 more
doaj   +1 more source

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