弱阻尼KdV方程样条小波基下约化形式的弱解

本文研究弱阻尼ＫｄＶ方程样条小波基下约化形式的弱解·     

RLC并联电路暂态过程实验

介绍笔者的设计ＲＬＣ并联电路暂态过程实验装置，利用电子开关，可方便地在通示波器上观察ＲＬＣ并联电路的暂态过程，有关参数的测量结果与理论结果得到较好符合。     

粘性空腔流的格子Bcltzmann方法模拟

利用１３ 速六方格子Ｂｏｌｔｚｍａｎｎ 方法模拟了粘性空腔流中流速、密度及温度的分布情况，并考察了当τ＝ ０－６３８６ 时，流场分布的不稳定性     

关于一个具切边粘性实际粘性热传导流体的注记

This paper is concerned with the global existence and exponential stability of solutions with large initial date in H1 for real viscous heat-conducting flow with shear viscosity.     

Standing Shocks in Viscous Accretion Flows around Black Holes

We study the problem of standing shocks in viscous accretion flows around black holes. We parameterize such a flow with two physical constants, namely the specific angular momentum accreted by the black hole j and the energy quantity K. By providing the global dependence of shock formation in the j - K parameter space, we show that a significant parameter region can ensure solutions with shocks of different types, namely Rankine-Hugoniot shocks, isothermal shocks, and more realistically, mixed shocks.     

非线性规划问题的一个内点势减算法的全局收敛性

结合经典阻尼牛顿方法和线性规划内点势减方法建立了一个求解一般非线性规划问题的内点势减算法.理论分析表明在一些假设条件下,这一方法产生的序列全局收敛于问题的KKT点.     

非旋转银河系的重力不稳定性

银河系中星体分布的重力不稳定性在天文物理是个熟知的问题.尝试以加速器物理的方法初步分析了这个现象, 得到非旋转银河系在它的大小超过某阈值时会呈现不稳定现象的结论,而此阈值与银河系的质量密度有关.     

涡电流及其机械阻尼效应演示

本文对涡电流的机械阻尼效应作一受力分析并设计一个好的演示实验。     

An Unexpected Frequency Response of A Piezoelectric Quartz Crystal Sensor to the Density and Viscosity of the Liquid

An unexpected frequency response for a piezoelectric quartz crystal (PQC) sensor to liquid density and viscosity was reported. For a PQC oscillating in a liquid phase, the frequency shifts (△f) show a wave-shape response to liquid density (p) and viscosity 03) in fine structure, ifthe longitudinal wave effect was not eliminated. This result is different from the well-knownlinear relationship between of Af and (ρη)1/2. An oscillating frequency-temperature curve of thesensor was observed and explained.