The Experts below are selected from a list of 56256 Experts worldwide ranked by ideXlab platform
Pengfei Yao - One of the best experts on this subject based on the ideXlab platform.
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energy decay and global solutions for a damped free Boundary fluid elastic structure interface model with variable coefficients in elasticity
Applicable Analysis, 2020Co-Authors: Yizhao Qin, Pengfei YaoAbstract:ABSTRACTWe study a free Boundary fluid-structure interaction model. In the model, a viscous incompressible fluid interacts with an elastic body via the Common Boundary. The motion of the fluid is g...
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energy decay and global solutions for a damped free Boundary fluid elastic structure interface model with variable coefficients in elasticity
arXiv: Analysis of PDEs, 2018Co-Authors: Yizhao Qin, Pengfei YaoAbstract:We cope with a free Boundary fluid-structure interaction model. In the model, the viscous incompressible fluid interacts with elastic body via the Common Boundary. The motion of the fluid is governed by Navier-Stokes equations while the displacement of elastic structure is described by variable coefficient wave equations. The dissipation is placed on the Common Boundary between fluid and elastic body. Given small initial data, the global existence of the solutions of this system is proved and the exponential decay of solutions are obtained.
Ze-jun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Fast SAR Image Segmentation via Merging Cost With Relative Common Boundary Length Penalty
IEEE Transactions on Geoscience and Remote Sensing, 2014Co-Authors: Peng-lang Shui, Ze-jun ZhangAbstract:In this paper, a region-merging-based method is proposed for fast segmentation of amplitude-format synthetic aperture radar (SAR) images. It combines the existing fast initial partition by applying the watershed transform to the thresholded ratio edge strength map with fast region merging by using a new merging cost with relative Common Boundary length penalty (RCBLP) and the nearest neighbor graph (NNG) for fast search minimal edge on a region adjacency graph (RAG). A new statistical similarity measure, which is a scale-invariant and approximately constant false alarm rate with respect to region sizes, is proposed and combined with an RCBLP term to form a new merging cost. The region-merging process starting from the initial partition is fast implemented by means of the RAG and NNG. Several quantitative indexes in optical image segmentation assessment are borrowed for quantitative assessment of segmentation quality. Experiments to synthetic and real SAR images are reported. The results show that the proposed method is fast and attains higher quality segmentation results than the two recent state-of-the-art methods.
Jean-pierre Rosay - One of the best experts on this subject based on the ideXlab platform.
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Common Boundary values of holomorphic functions for two-sided complex structures
The Michigan Mathematical Journal, 2014Co-Authors: Florian Bertrand, Xianghong Gong, Jean-pierre RosayAbstract:L et� 1, � 2 be two disjoint open sets in R 2n whose bound- aries share a smooth real hypersurface M as a relatively open sub- set. Assume thati is equipped with a complex structure J i that is smooth up to M. Suppose that at each point x ∈ M there is a vector v ∈ Tx M such that J 1 x v and J 2 x v are in the same connected component of TxR 2n \ Tx M.I ff is holomorphic with respect to both structures in the open sets and continuous on � 1 ∪ M ∪ � 2 ,t henf must be smooth on the union � 1 ∪ M. Although the result, as stated, is far more meaningful for integrable structures, our methods make it much more natural to deal with the general almost complex structures with- out the integrability condition. The result is therefore proved in the framework of almost complex structures.
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Common Boundary values of holomorphic functions for two-sided complex structures
arXiv: Complex Variables, 2010Co-Authors: Florian Bertrand, Xianghong Gong, Jean-pierre RosayAbstract:Let $\Omega_1,\Omega_2$ be two disjoint open sets in $\mathbf C^n$ whose boundaries share a smooth real hypersurface $M$ as relatively open subsets. Assume that $\Omega_i$ is equipped with a complex structure $J^i$ which is smooth up to $M$. Assume that the operator norm $\|J^2-J^1\|
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Common Boundary values of holomorphic functions for two sided complex structures
arXiv: Complex Variables, 2010Co-Authors: Florian Bertrand, Xianghong Gong, Jean-pierre RosayAbstract:Let $\Omega_1,\Omega_2$ be two disjoint open sets in $\mathbf C^n$ whose boundaries share a smooth real hypersurface $M$ as relatively open subsets. Assume that $\Omega_i$ is equipped with a complex structure $J^i$ which is smooth up to $M$. Assume that the operator norm $\|J^2-J^1\|<2$ on $M$. Let $f$ be a continuous function on the union of $\Omega_1,\Omega_2, M$. If $f$ is holomorphic with respect to both structures in the open sets, then $f$ must be smooth on the union of $\Omega_1$ with $M$. Although the result as stated is far more meaningful for integrable structures, our methods make it much more natural to deal with the general almost complex structures without the integrability condition. The result is therefore proved in the framework of almost complex structures.
Yu Zhining - One of the best experts on this subject based on the ideXlab platform.
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Stress And Strain Analysis For Varied Elastic Modulus Material And Its Photoelastic Solution Of Stress State On Its Interface
1999Co-Authors: Wang Feng, Yu Zhining, X. Huimiif, P. Dietz, A. SchmidtAbstract:In this study a new experimental method for the solution of the stress state of the points on the Common Boundary plane of three dimensional photoelastic model with materials of varied elastic moduli is proposed. Experimental solution of the stress tensor is obtained by continuous conditions of deformation on interface, relations between stress and strain, stress optics law, and oblique method.
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A note on stress- and strain-analysis for materials with different elastic modulus and a photoelastic solution of the stress state for points on the interface
Journal of Materials Processing Technology, 1997Co-Authors: Wang Feng, Xie Huimin, Yu ZhiningAbstract:Abstract Based on stress function theory, this paper presents a stress analysis of the Common Boundary area of materials of different elastic moduli. In addition, a new experimental method for the solution of the stress state of points on the Common Boundary plane of a three-dimensional photoelastic model with materials of different elastic moduli is proposed. An experimental solution of the stress tensor is obtained by the continuous conditions of deformation on the interface, the relationships between stress and strain, the stress-optics law, and the oblique-incidence method.
J. M. H. Levelt Sengers - One of the best experts on this subject based on the ideXlab platform.
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The discovery of Type-IV binary fluid phase behavior
Fluid Phase Equilibria, 2004Co-Authors: J. M. H. Levelt SengersAbstract:The computer analysis by Scott and Van Konynenburg of the Van der Waals binary mixture for constant excluded volume uncovered the Type-IV phase diagram as a transition between Type-II and Type-III phase diagrams. The Common Boundary of the regions of Type-II and Type-III is a locus of tricritical points. The tricritical locus meets the Common Boundary of regions of Type-II and Type-IV at what Meijer coined the Van Laar point in 1989. The present paper shows, however, that as early as 1905 the Dutch chemist Van Laar produced Type-II and Type-III phase diagrams for the geometric-mean Van der Waals binary mixture, and found the exact coordinates of what we call the Van Laar point, but he did not notice tricriticality explicitly. He postulated and proved the existence of the Type-IV phase diagram. Aspects of his proof are discussed.