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学者姓名:王靖岳
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This paper utilizes a coupled model of the lattice Boltzmann method and discrete element method (LBM-DEM) to simulate the flow field and particle motion in a three-dimensional porous medium. It investigates the impact of different microstructural characteristics of filter media on filtration performance under the same porosity conditions. The model not only considers the mechanisms of inertial deposition and electrostatic forces but also incorporates the effects of Brownian diffusion and dielectrophoresis, providing a preliminary comparison of various filtration mechanisms. The research results indicate that: (1) under identical porosity conditions, the filtration efficiency of unidirectional interlaced fibers significantly surpasses that of other fiber models with different microstructures; (2) the model integrating four filtration mechanisms demonstrates higher filtration efficiency. © Published under licence by IOP Publishing Ltd.
Keyword :
Computational fluid dynamics Computational fluid dynamics High modulus textile fibers High modulus textile fibers Hydraulics Hydraulics Infiltration Infiltration Kinetic theory Kinetic theory Microfiltration Microfiltration Micropores Micropores Porosity Porosity Porous materials Porous materials
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GB/T 7714 | Chen, Xueyan , Wang, Jingyue , Wang, Meiqing . Numerical simulation of different microstructures on fiber filtration efficiency [C] . 2025 . |
MLA | Chen, Xueyan 等. "Numerical simulation of different microstructures on fiber filtration efficiency" . (2025) . |
APA | Chen, Xueyan , Wang, Jingyue , Wang, Meiqing . Numerical simulation of different microstructures on fiber filtration efficiency . (2025) . |
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针对一般深度学习方法求解非线性偏微分方程时泛化能力差的问题,提出一种使用改进欧拉法联通网络模块的长短期卷积循环神经网络.该神经网络的构建运用改进欧拉法和有限差分法,通过改进欧拉法实现网络中模块之间的有效连接.基于有限差分法构建的卷积核实现偏微分方程中涉及的导数项的精确近似,并在Burgers方程和λ-ω反应扩散方程上进行仿真实验.实验结果证明,该方法不但在训练数据上具有很高的精度,而且在外推到新领域时也表现出较强的泛化能力.
Keyword :
偏微分方程 偏微分方程 改进欧拉法 改进欧拉法 有限差分法 有限差分法 深度学习 深度学习 长短期记忆 长短期记忆
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GB/T 7714 | 黄冠男 , 王靖岳 , 王美清 . 基于改进欧拉法的非线性偏微分方程神经网络求解器 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (04) : 396-403 . |
MLA | 黄冠男 等. "基于改进欧拉法的非线性偏微分方程神经网络求解器" . | 福州大学学报(自然科学版) 52 . 04 (2024) : 396-403 . |
APA | 黄冠男 , 王靖岳 , 王美清 . 基于改进欧拉法的非线性偏微分方程神经网络求解器 . | 福州大学学报(自然科学版) , 2024 , 52 (04) , 396-403 . |
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We use the Multiple-Relaxation-Time Lattice Boltzmann model to simulate the flow field and particle motion in a 2D porous media configured with various fiber cross-section shapes. Four sets of experiments are conducted to investigate the particle interception efficiency of four fiber structures with the same porosity. We find that: (1) with the same porosity, the filtration efficiency of hexagonal fibers is higher than that of fibers in other tested shapes; (2) sparse structures as shown in the ellipse and rectangular cases yield low filtration efficiencies even with a low porosity number. © 2022 IEEE.
Keyword :
Efficiency Efficiency Electroosmosis Electroosmosis Fibers Fibers Porosity Porosity Porous materials Porous materials Relaxation time Relaxation time
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GB/T 7714 | Lin, Xinyi , Wang, Jingyue , Wang, Meiqing et al. Numerical simulation of particle interception efficiency on different fiber shapes [C] . 2022 : 250-253 . |
MLA | Lin, Xinyi et al. "Numerical simulation of particle interception efficiency on different fiber shapes" . (2022) : 250-253 . |
APA | Lin, Xinyi , Wang, Jingyue , Wang, Meiqing , Guo, Shumin , Zheng, Gaofeng , Lai, Choi-Hong . Numerical simulation of particle interception efficiency on different fiber shapes . (2022) : 250-253 . |
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We present a convergence analysis for a finite difference scheme for the time dependent partial different equation called gradient flow associated with the Rudin-Osher-Fetami model. We devise an iterative algorithm to compute the solution of the finite difference scheme and prove the convergence of the iterative algorithm. Finally computational experiments are shown to demonstrate the convergence of the finite difference scheme. © The Author(s) 2021.
Keyword :
Convergence of numerical methods Convergence of numerical methods Finite difference method Finite difference method Iterative methods Iterative methods
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GB/T 7714 | Hong, Qianying , Lai, Ming-Jun , Wang, Jingyue . The convergence of a numerical method for total variation flow [J]. | Journal of Algorithms and Computational Technology , 2021 , 15 . |
MLA | Hong, Qianying et al. "The convergence of a numerical method for total variation flow" . | Journal of Algorithms and Computational Technology 15 (2021) . |
APA | Hong, Qianying , Lai, Ming-Jun , Wang, Jingyue . The convergence of a numerical method for total variation flow . | Journal of Algorithms and Computational Technology , 2021 , 15 . |
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Fibrous porous media plays an important role in aerosol or small particle filtration. The filtration of fibrous porous media is a composite process, of which the filtration performance is affected by many parameters and is quite difficult to be predicted precisely. In this paper the parameters affecting the filtration performance are re-examined. Especially, the influences of fiber sizes and the porosity of the porous media to the filtration efficiency are analyzed further.
Keyword :
characteristic parameters characteristic parameters fibrous porous media fibrous porous media filtration performance filtration performance
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GB/T 7714 | Hu, Chong , Wang, Meiqing , Wang, Jingyue et al. Characteristic Parameters Affecting the Filtration Performance in Fibrous Porous Media [C] . 2019 : 203-206 . |
MLA | Hu, Chong et al. "Characteristic Parameters Affecting the Filtration Performance in Fibrous Porous Media" . (2019) : 203-206 . |
APA | Hu, Chong , Wang, Meiqing , Wang, Jingyue , Zheng, Gaofeng , Guo, Shumin , Lai, Choi-Hong . Characteristic Parameters Affecting the Filtration Performance in Fibrous Porous Media . (2019) : 203-206 . |
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The implied volatility in the Black-Scholes model is assumed as a constant. However, empirical analysis proves that the values of the implied volatility based on the same underlying asset vary with the underlying asset price, maturity date, time to maturity, and the strike price. Ronald Lagnado and Stanley Osher and Chiarella proposed the techniques for calibrating derivative pricing by solving an inverse problem. In this paper, an improved model is proposed. In which, the influence of the options with different strike prices is distinguished by weights and the choices of the weight functions are discussed. The approach we take is numerically solving an inverse problem which is more solid in theory than simple regression methods. Numerical results show that our model has better adaptivity and accuracy than traditional models.
Keyword :
B-S model B-S model implied volatility implied volatility options options Poisson equation Poisson equation the inverse problem method the inverse problem method
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GB/T 7714 | Sun, Huiping , Wang, Meiqing , Du, Boyuan et al. A Weighted Strike-Related Implied Volatility Model [C] . 2018 : 212-215 . |
MLA | Sun, Huiping et al. "A Weighted Strike-Related Implied Volatility Model" . (2018) : 212-215 . |
APA | Sun, Huiping , Wang, Meiqing , Du, Boyuan , Wang, Jingyue . A Weighted Strike-Related Implied Volatility Model . (2018) : 212-215 . |
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This paper proposes a privacy-preserving retrieval scheme for JPEG images based on local variance. Three parties are involved in the scheme: the content owner, the server, and the authorized user. The content owner encrypts JPEG images for privacy protection by jointly using permutation cipher and stream cipher, and then, the encrypted versions are uploaded to the server. With an encrypted query image provided by an authorized user, the server may extract blockwise local variances in different directions without knowing the plaintext content. After that, it can calculate the similarity between the encrypted query image and each encrypted database image by a local variance-based feature comparison mechanism. The authorized user with the encryption key can decrypt the returned encrypted images with plaintext content similar to the query image. The experimental results show that the proposed scheme not only provides effective privacy-preserving retrieval service but also ensures both format compliance and file size preservation for encrypted JPEG images. (C) 2017 SPIE and IS&T
Keyword :
feature descriptor feature descriptor image encryption image encryption image retrieval image retrieval JPEG image JPEG image
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GB/T 7714 | Cheng, Hang , Wang, Jingyue , Wang, Meiqing et al. Toward privacy-preserving JPEG image retrieval [J]. | JOURNAL OF ELECTRONIC IMAGING , 2017 , 26 (4) . |
MLA | Cheng, Hang et al. "Toward privacy-preserving JPEG image retrieval" . | JOURNAL OF ELECTRONIC IMAGING 26 . 4 (2017) . |
APA | Cheng, Hang , Wang, Jingyue , Wang, Meiqing , Zhong, Shangping . Toward privacy-preserving JPEG image retrieval . | JOURNAL OF ELECTRONIC IMAGING , 2017 , 26 (4) . |
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We propose the eigenvalue problem of an anisotropic diffusion operator for image segmentation. The diffusion matrix is defined based on the input image. The eigenfunctions and the projection of the input image in some eigenspace capture key features of the input image. An important property of the model is that for many input images, the first few eigenfunctions are close to being piecewise constant, which makes them useful as the basis for a variety of applications, such as image segmentation and edge detection. The eigenvalue problem is shown to be related to the algebraic eigenvalue problems resulting from several commonly used discrete spectral clustering models. The relation provides a better understanding and helps developing more efficient numerical implementation and rigorous numerical analysis for discrete spectral segmentation methods. The new continuous model is also different from energy-minimization methods such as active contour models in that no initial guess is required for in the current model. A numerical implementation based on a finite-element method with an anisotropic mesh adaptation strategy is presented. It is shown that the numerical scheme gives much more accurate results on eigenfunctions than uniform meshes. Several interesting features of the model are examined in numerical examples, and possible applications are discussed.
Keyword :
anisotropic diffusion anisotropic diffusion Eigenvalue problem Eigenvalue problem finite-element schemes finite-element schemes image segmentation image segmentation mesh adaptation mesh adaptation
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GB/T 7714 | Wang, Jingyue , Huang, Weizhang . Image Segmentation With Eigenfunctions of an Anisotropic Diffusion Operator [J]. | IEEE TRANSACTIONS ON IMAGE PROCESSING , 2016 , 25 (5) : 2155-2167 . |
MLA | Wang, Jingyue et al. "Image Segmentation With Eigenfunctions of an Anisotropic Diffusion Operator" . | IEEE TRANSACTIONS ON IMAGE PROCESSING 25 . 5 (2016) : 2155-2167 . |
APA | Wang, Jingyue , Huang, Weizhang . Image Segmentation With Eigenfunctions of an Anisotropic Diffusion Operator . | IEEE TRANSACTIONS ON IMAGE PROCESSING , 2016 , 25 (5) , 2155-2167 . |
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Anisotropic mesh adaptation is studied for the linear finite element solution of eigenvalue problems with anisotropic diffusion operators. The M-uniform mesh approach is employed with which any nonuniform mesh is characterized mathematically as a uniform one in the metric specified by a metric tensor. Bounds on the error in the computed eigenvalues are established for quasi-M-uniform meshes. Numerical examples arising from the Laplace-Beltrami operator on parameterized surfaces and nonlinear diffusion problems in image processing and radiation hydrodynamics are presented. Numerical results show that anisotropic adaptive meshes can lead to more accurate computed eigenvalues than uniform or isotropic adaptive meshes. They also confirm the second order convergence of the error that is predicted by the theoretical analysis. The effects of approximation of curved boundaries on the computation of eigenvalue problems is also studied in two dimensions. It is shown that the initial mesh used to define the geometry of the physical domain should contain at least root N boundary points to keep the effects of boundary approximation at the level of the error of the finite element approximation, where N is the number of the elements in the final adaptive mesh. Only about 3 root N boundary points in the initial mesh are needed for boundary value problems. This implies that the computation of eigenvalue problems is more sensitive to the boundary approximation than that of boundary value problems.
Keyword :
anisotropic diffusion anisotropic diffusion anisotropic mesh anisotropic mesh eigenvalue problem eigenvalue problem error analysis error analysis finite element finite element mesh adaptation mesh adaptation
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GB/T 7714 | Wang, Jingyue , Huang, Weizhang . A STUDY ON ANISOTROPIC MESH ADAPTATION FOR FINITE ELEMENT APPROXIMATION OF EIGENVALUE PROBLEMS WITH ANISOTROPIC DIFFUSION OPERATORS [J]. | SIAM JOURNAL ON SCIENTIFIC COMPUTING , 2015 , 37 (6) : A2924-A2946 . |
MLA | Wang, Jingyue et al. "A STUDY ON ANISOTROPIC MESH ADAPTATION FOR FINITE ELEMENT APPROXIMATION OF EIGENVALUE PROBLEMS WITH ANISOTROPIC DIFFUSION OPERATORS" . | SIAM JOURNAL ON SCIENTIFIC COMPUTING 37 . 6 (2015) : A2924-A2946 . |
APA | Wang, Jingyue , Huang, Weizhang . A STUDY ON ANISOTROPIC MESH ADAPTATION FOR FINITE ELEMENT APPROXIMATION OF EIGENVALUE PROBLEMS WITH ANISOTROPIC DIFFUSION OPERATORS . | SIAM JOURNAL ON SCIENTIFIC COMPUTING , 2015 , 37 (6) , A2924-A2946 . |
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