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首页> 外文期刊>Journal of physics, A. Mathematical and theoretical >On a variable-coefficient Korteweg-de Vries model in fluid-filled elastic tubes
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On a variable-coefficient Korteweg-de Vries model in fluid-filled elastic tubes

机译:在充满流体的弹性管中的变系数Korteweg-de Vries模型上

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摘要

In this paper we investigate a variable-coefficient Korteweg-de Vries (vcKdV) model in arterial mechanics. A new Lax pair of the vcKdV model is constructed, based on which the B?cklund transformation, solitonic and some other solutions of the vcKdV model are obtained. With symbolic computation, the influence of the variable coefficients on solitonic propagation is investigated based on the solitonic solution, which has the following three aspects: (i) the coefficient of the nonlinear term affects the solitonic amplitude; (ii) the coefficient of the dispersive term controls the solitonic velocity and propagation trace; (iii) the coefficient of the dissipative term acts on both the solitonic amplitude and the velocity. We also analyze the variations of velocity and pressure of blood flow along the scaled axial coordinate after the static deformation in the vicinity of stenosis.
机译:在本文中,我们研究了动脉力学中的变系数Korteweg-de Vries(vcKdV)模型。构造了一个新的vcKdV模型的Lax对,在此基础上获得了VCKdV模型的B?cklund变换,孤子和其他解。通过符号计算,基于孤子解研究了变系数对孤子传播的影响,它具有以下三个方面:(i)非线性项的系数影响孤子幅度; (ii)色散项的系数控制孤子速度和传播轨迹; (iii)耗散项的系数同时作用于孤子振幅和速度。我们还分析了狭窄附近的静态变形后沿标度轴向坐标的血流速度和压力的变化。

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