The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform
Y U Jifen - One of the best experts on this subject based on the ideXlab platform.
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research on formula of adjusting mineral mixture ratio based on Grading Requirement
The World of Building Materials, 2015Co-Authors: Y U JifenAbstract:This paper introduces the formula of adjusting mineral mixture ratio based on the Grading Requirement.According to the increment of the mineral mixture on a sieve,the proportion of the mixture is calculated.This can important to improve the efficiency of composition design of mineral mixture and control the Grading of the mixture in the mixing station.
Per-olof Persson - One of the best experts on this subject based on the ideXlab platform.
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Mesh size functions for implicit geometries and PDE-based gradient limiting
Engineering with Computers, 2006Co-Authors: Per-olof PerssonAbstract:Mesh generation and mesh enhancement algorithms often require a mesh size function to specify the desired size of the elements. We present algorithms for automatic generation of a size function, discretized on a background grid, by using distance functions and numerical PDE solvers. The size function is adapted to the geometry, taking into account the local feature size and the boundary curvature. It also obeys a Grading constraint that limits the size ratio of neighboring elements. We formulate the feature size in terms of the medial axis transform, and show how to compute it accurately from a distance function. We propose a new Gradient Limiting Equation for the mesh Grading Requirement, and we show how to solve it numerically with Hamilton–Jacobi solvers. We show examples of the techniques using Cartesian and unstructured background grids in 2D and 3D, and applications with numerical adaptation and mesh generation for images.
