A5100653949- Advanced Numerical Methods in Computational Mathematics
- Electromagnetic Simulation and Numerical Methods
- Numerical methods in engineering
- Nanopore and Nanochannel Transport Studies
- Handwritten Text Recognition Techniques
- Distributed and Parallel Computing Systems
- Advanced Data Storage Technologies
- Image Retrieval and Classification Techniques
- Interactive and Immersive Displays
- Advanced Optical Imaging Technologies
- Image Processing and 3D Reconstruction
- Lattice Boltzmann Simulation Studies
- Computational Fluid Dynamics and Aerodynamics
- Advanced Numerical Analysis Techniques
- Parallel Computing and Optimization Techniques
- Advanced Image and Video Retrieval Techniques
- Matrix Theory and Algorithms
- Advanced Mathematical Modeling in Engineering
- Fluid Dynamics and Turbulent Flows
- Computational Geometry and Mesh Generation
- Remote-Sensing Image Classification
- Interconnection Networks and Systems
- NMR spectroscopy and applications
- Electromagnetic Scattering and Analysis
- Video Surveillance and Tracking Methods
Chinese Academy of Sciences
2011-2024
China Southern Power Grid (China)
2021-2024
Academy of Mathematics and Systems Science
2012-2024
University of Chinese Academy of Sciences
2017-2024
National Center for Mathematics and Interdisciplinary Sciences
2020-2024
Taiyuan University of Technology
2024
Beihang University
2021-2023
Harbin Engineering University
2018
Institute of Computing Technology
2000-2017
Jilin Agricultural University
2017
Cloud detection plays an essential role in meteorological research and has received considerable attention recent years. However, this issue is particularly challenging due to the diverse characteristics of clouds. In letter, a novel algorithm based on superpixel segmentation (SPS) proposed for cloud detection. our strategy, series superpixels could be obtained adaptively by SPS according We first calculate local threshold each then determine matrix whole image. Finally, can detected...
Light field 3D display technology is considered a revolutionary to address the critical visual fatigue issues in existing displays. Tabletop light provides brand-new form that satisfies multi-user shared viewing and collaborative works, it poised become potential alternative traditional wall portable forms. However, large radial angle correct perspective parallax are still out of reach for most current tabletop displays due limited amount spatial information. To issues, novel integral...
A parallel finite element simulator, ichannel, is developed for ion transport through three‐dimensional channel systems that consist of protein and membrane. The coordinates heavy atoms the are taken from Protein Data Bank membrane represented as a slab. simulator contains two components: adaptive solver set Poisson–Nernst–Planck (PNP) equations describe electrodiffusion process transport, mesh generation tool chain systems, which an essential component computations. method has advantages in...
We develop an adaptive finite element method for solving the eddy current model with voltage excitations complicated three-dimensional structures. The mathematical is based on $\mathbf{A}-\phi$ formulation whose well-posedness established. derive a posteriori error estimate approximation of solution not unique in nonconducting region. Numerical experiments that illustrate competitive behavior proposed are provided.
Abstract This paper is concerned with the construction of high order mass-lumping finite elements on simplexes and a program for computing triangles tetrahedra. The polynomial spaces elements, as proposed in literature, are presented discussed. In particular, unisolvence problem symmetric point-sets used addressed, an interesting property unisolvent observed Though its theoretical proof still lacking, this seems to be true general, it can greatly reduce number cases consider computations...
Given a shape regular tetrahedron and curved surface that is defined implicitly by nonlinear level set function divides the into two sub-domains, general-purpose, robust, high-order numerical algorithm proposed in this article for computing both volume integrals sub-domains on their common boundary. The uses direct approach decomposes 3D or 2D multiple 1D computes with Gaussian quadratures. It only requires finding roots of univariate functions given intervals evaluating integrand, function,...
Abstract rithms for solving the 3D electro-diffusion equations such as Poisson-Nernst-Planck and size-modified in simulations of biomolecular systems ionic liquid. A set transformation methods based on generalized Slotboom variables is used to solve coupled equations. Calculations diffusion-reaction rate coefficients, electrostatic potential ion concentrations various verify method’s validity stability. The iterations between Poisson equation Nernst- Planck primitive method are compared...
Abstract The classical discontinuous Galerkin (DG) methods are designed for elliptic (parabolic) problems and hyperbolic problems. For reservoir simulations, the pressure equation from black oil model is (parabolic), while equations saturations hyperbolic. Due to this special property, it difficult directly apply model. In paper, we extend simulations. our schemes, local (LDG) method used discretize upwind concept combined with numerical flux term of LDG simulate direction propagation...
We report our work on evaluating performance of several MPI Allgather algorithms fast Ethernet. These are ring, recursive doubling, Bruck, and neighbor exchange. The first three widely used today. exchange algorithm which was proposed by the authors incorporates pair-wise exchange, is expected to perform better with certain configurations, mainly when using TCP/IP over tested four terascale Linux clusters DeepComp 6800 DAWNING 4000A Results show that performs best for long messages, ring...
Abstract In this paper, hp -adaptive finite element methods are studied for time-harmonic Maxwell’s equations. We propose the parallel algorithms on conforming unstructured tetrahedral meshes based residual-based a posteriori error estimates. Extensive numerical experiments reported to investigate efficiency of point singularities, edge and an engineering benchmark problem The show much better performance than h method.
This paper focuses on a three-dimensional (3-D) charged conical nanopore, vertically centered in cuboid domain, with an action boundary condition set for the applied bias voltage upper surface. In order to study time-dependent I-V characteristics, we use algorithm consisting of backward Euler method and finite element solve 3-D Poisson-Nernst-Planck equations. An analytical solution varying is first used test reliability accuracy algorithm. Then, influence area surface distance from pore...
资助项目摘要 PHG (parallel hierarchical grid) 是一个由中国科学院 "科学与工程计算国家重点实验室" 研制 的开源并行自适应有限元程序开发平台.与国际上其他同类型软件相比, 其主要特征有: 关键词
Abstract This paper addresses the existence and construction of Hamiltonian paths cycles on conforming tetrahedral meshes. The are constrained to pass from one tetrahedron next through a vertex. For meshes, under certain conditions which normally satisfied in finite-element computations, we show that there exists through-vertex path between any two tetrahedra. proof is constructive an efficient algorithm for computing can be directly derived. Keywords: adaptive finite elementtetrahedral...