Elimination of Spiral Waves and Competition between Travelling Wave Impulses and Spiral Waves

The interaction between travelling wave impulses and spiral waves is studied and the results of their competition are related to the exciting period. From the results, it is known that the formation and development of spiral waves in cardiac tissue depend on the period by which the travelling wave impulses are excited. A method is proposed to eliminate spiral waves, which is easily operated.     

二维渗流相关长度ξ(p)的幂估计(英文)

相关长度ξ(p)是渗流理论中最重要的一个量。本文对它给出了一个幂估计     

二阶强次线性常微分方程解的振动性

本文讨论二阶非线性常微分方程 (a(t)ψ(x(t))x’(t))’+q(t)f(x(t))g(x’(t))=0 (1)的解的振动性质。在方程(1)中,α∈C[[t_0,∞),(0,∞)],ψ∈C[R,(0,∞)](R=(-∞,+∞)),q∈C[[t_0,∞),[0,∞)]且在任意的区间(t,∞)(t≥t_0)上不恒等于0,f∈C’[R,R],g∈C[R,R]。关于微分方程振动性的定义,如通常定义,不再详述。在下面的定理中,以下条件将要用到:     

最大度为6的极大外平面图的完备色数

证明了最大度为６的极大外平面图的完备色数为７。     

非相对论BUU近似下的横动量分析

由不同有效质量m^*/m与压缩系数K所标示的平均场的非相对论BUU计算,研究了横动量的产生机制,并讨论了m^*/m和K对横动量等的影响.发现横动量对K的依赖不太灵敏,但对m^*/m却十分灵敏.