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Search Results: 1 - 10 of 36911 matches for " Yuncheng Zhao "
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The Mural Form of Eosinophilic Esophagitis Is Accompanied by Superficial Esophageal Squamous Cell Carcinoma
Zhao Jingsheng,Luo Yuncheng,Miao Yingye,Li Hao,Li Congyang
Case Reports in Pathology , 2012, DOI: 10.1155/2012/315428
Abstract: Eosinophilic esophagitis (EE) is an increasingly recognized primary clinicopathologic disorder of the esophagus which lacks a specific etiology. Most reports on EE have been limited to the esophagus mucosa. We present a 56-year-old man with the mural form of EE and superficial squamous cell carcinoma in the esophagus. The eosinophils diffusely invaded the full-thickness of the esophagus, mainly infiltrating the muscularis, including the skeletal and smooth muscles. The lesions in the mucosa, submucosa, and adventitia were slight. Although the superficial squamous cell carcinoma was excited by an endoscopic biopsy, there were some changes in the architecture and size of the squamous epithelial cells. The changed cells also expressed the p53 protein. It appears that the eosinophils stimulated cell proliferation, followed by genetic mutations and cancer development. The patient survived with resection of the esophagus and inhaled corticosteroids.
The Mural Form of Eosinophilic Esophagitis Is Accompanied by Superficial Esophageal Squamous Cell Carcinoma
Zhao Jingsheng,Luo Yuncheng,Miao Yingye,Li Hao,Li Congyang
Case Reports in Pathology , 2012, DOI: 10.1155/2012/315428
Abstract: Eosinophilic esophagitis (EE) is an increasingly recognized primary clinicopathologic disorder of the esophagus which lacks a specific etiology. Most reports on EE have been limited to the esophagus mucosa. We present a 56-year-old man with the mural form of EE and superficial squamous cell carcinoma in the esophagus. The eosinophils diffusely invaded the full-thickness of the esophagus, mainly infiltrating the muscularis, including the skeletal and smooth muscles. The lesions in the mucosa, submucosa, and adventitia were slight. Although the superficial squamous cell carcinoma was excited by an endoscopic biopsy, there were some changes in the architecture and size of the squamous epithelial cells. The changed cells also expressed the p53 protein. It appears that the eosinophils stimulated cell proliferation, followed by genetic mutations and cancer development. The patient survived with resection of the esophagus and inhaled corticosteroids. 1. Introduction Eosinophilic esophagitis (EE) was first described by Furuta et al. and deemed a variant of eosinophilic gastroenteritis [1]. Since then, reports on this condition have increased. EE is an increasingly recognized primary clinicopathologic disorder of the esophagus which lacks a specific etiology [2, 3]. Its symptoms include dysphagia, vomiting, regurgitation, nausea, epigastric pain, and heartburn. Endoscopic features include rings, furrows, white specks, and a narrow caliber esophagus [4]. Most reports on EE have been limited to the esophagus mucosa. Here, we report a very rare case of a mural form of EE that is associated with esophageal superfical squamous cell carcinoma. 2. Case Report 2.1. Clinical History A 56-year-old man presented as having abdominal distention with no reason for six years. Chinese medicine helped to relieve his symptoms. He had no other complaints, although six months prior, his skin had started itching, and three weeks prior he felt unable to successfully swallow hard food but could swallow semifluid food. He also had no history of asthma or allergies. The man went to the local hospital and had a gastroscopic examination, which showed a mass of about 1.3?cm × 1.2?cm in size (Figure 1(a)), located on the posterior wall 34?cm from the incisors. Mucosa, in the cardiac stomach, the body/fundic stomach, the pyloric stomach, and the duodenal bulb were relatively normal. An esophageal biopsy was performed and squamous cell carcinoma was diagnosed, requiring the patient to undergo surgery. During the operation, the surgeon found that the thoracic portion of the esophagus was
Syntheses of differential games and pseudo-Riccati equations
Yuncheng You
Abstract and Applied Analysis , 2002, DOI: 10.1155/s1085337502000817
Abstract: For differential games of fixed duration oflinear dynamical systems with nonquadratic payoff functionals, itis proved that the value and the optimal strategies as saddlepoint exist whenever the associated pseudo-Riccati equation has aregular solution P(t,x). Then the closed-loop optimalstrategies are given by u(t)=−R−1B∗P(t,x(t)), v(t)=−S−1C∗P(t,x(t)). For differential game problems ofMayer type, the existence of a regular solution to thepseudo-Riccati equation is proved under certain assumptions and aconstructive expression of that solution can be found by solvingan algebraic equation with time parameter.
Inertial manifolds and stabilization of nonlinear beam equations with Balakrishnan-Taylor damping
Yuncheng You
Abstract and Applied Analysis , 1996, DOI: 10.1155/s1085337596000048
Abstract: In this paper we study a hinged, extensible, and elastic nonlinear beam equation with structural damping and Balakrishnan-Taylor damping with the full exponent 2(n+ 2)+1. This strongly nonlinear equation, initially proposed by Balakrishnan and Taylor in 1989, is a very general and useful model for large aerospace structures. In this work, the existence of global solutions and the existence of absorbing sets in the energy space are proved. For this equation, the feature is that the exponential rate of the absorbing property is not a global constant, but which is uniform for the family of trajectories starting from any given bounded set in the state space. Then it is proved that there exists an inertial manifold whose exponentially attracting rate is accordingly non-uniform. Finally, the spillover problem with respect to the stabilization of this equation is solved by constructing a linear state feedback control involving only finitely many modes. The obtained results are robust in regard to the uncertainty of the structural parameters.
Approximate inertial manifolds for nonlinear parabolic equations via steady-state determining mapping
Yuncheng You
International Journal of Mathematics and Mathematical Sciences , 1995, DOI: 10.1155/s0161171295000019
Abstract: For nonlinear parabolic evolution equations, it is proved that, under the assumptions of local Lipschitz continuity of nonlinearity and the dissipativity of semiflows, there exist approximate inertial manifolds (AIM) in the energy space and that the approximate inertial manifolds are constructed as the graph of the steady-state determining mapping based on the spectral decomposition. It is also shown that the thickness of the exponentially attracting neighborhood of the AIM converges to zero at a fractional power rate as the dimension of the AIM increases. Applications of the obtained results to Burgers' equation, higher dimensional reaction-diffusion equations, 2D Ginzburg-Landau equations, and axially symmetric Kuramoto-Sivashinsky equations in annular domains are included.
An Approach about Simulation Physics Experiments and Instructional Applications
Yuncheng Li
Journal of Computers , 2011, DOI: 10.4304/jcp.6.1.67-74
Abstract: Simulation physics, as a mode of instructional applications, in physics teaching has been widely used. So instructional design of simulation physics experiments is particularly important problems. This paper focuses on the simulation experiments design in teaching and learning environment.
Sharp asymptotic estimates for vorticity solutions of the 2D Navier-Stokes equation
Yuncheng You
Electronic Journal of Differential Equations , 2008,
Abstract: The asymptotic dynamics of high-order temporal-spatial derivatives of the two-dimensional vorticity and velocity of an incompressible, viscous fluid flow in $mathbb{R}^2$ are studied, which is equivalent to the 2D Navier-Stokes equation. It is known that for any integrable initial vorticity, the 2D vorticity solution converges to the Oseen vortex. In this paper, sharp exterior decay estimates of the temporal-spatial derivatives of the vorticity solution are established. These estimates are then used and combined with similarity and $L^p$ compactness to show the asymptotical attraction rates of temporal-spatial derivatives of generic 2D vorticity and velocity solutions by the Oseen vortices and velocity solutions respectively. The asymptotic estimates and the asymptotic attraction rates of all the derivatives obtained in this paper are independent of low or high Reynolds numbers.
Global dynamics of a reaction-diffusion system
Yuncheng You
Electronic Journal of Differential Equations , 2011,
Abstract: In this work the existence of a global attractor for the semiflow of weak solutions of a two-cell Brusselator system is proved. The method of grouping estimation is exploited to deal with the challenge in proving the absorbing property and the asymptotic compactness of this type of coupled reaction-diffusion systems with cubic autocatalytic nonlinearity and linear coupling. It is proved that the Hausdorff dimension and the fractal dimension of the global attractor are finite. Moreover, the existence of an exponential attractor for this solution semiflow is shown.
Global Attractor of a coupled Two-Cell Brusselator Model
Yuncheng You
Mathematics , 2009,
Abstract: In this work the existence of a global attractor for the solution semiflow of the coupled two-cell Brusselator model equations is proved. A grouping estimation method and a new decomposition approach are introduced to deal with the challenge in proving the absorbing property and the asymptotic compactness of this type of four-variable reaction-diffusion systems with cubic autocatalytic nonlinearity and with linear coupling. It is also proved that the Hausdorff dimension and the fractal dimension of the global attractor are finite.
Longtime Dynamics of The Oregonator System
Yuncheng You
Mathematics , 2011, DOI: 10.1002/mma.1591
Abstract: In this work the existence and properties of a global attractor for the solution semiflow of the Oregonator system are proved. The Oregonator system is the mathematical model of the famous Belousov-Zhabotinskii reaction. A rescaling and grouping estimation method is developed to show the absorbing property and the asymptotic compactness of the solution trajectories of this three-variable reaction-diffusion system with quadratic nonlinearity from the autocatalytic kinetics. It is proved that the fractal dimension of the global attractor is finite. The existence of an exponential attractor for this Oregonator semiflow is also shown.
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