《扩散波动》是集换卡牌游戏《游戏王》中的一张通常魔法卡，让1只7星以上的魔法师族怪兽获得群攻能力的效果。
采用真振幅单程波动方程进行计算，补偿了几何扩散造成的能量损失；
Using true-amplitude one-way wave equation, the energy loss by geometric diffusion can be compensated.
在二维情况下，忽略热扩散效应，利用汉克尔积分变换法和最陡下降法，求解热扩散方程和波动方程，得出了位移的解析表达式。
The thermal equation and wave equation are solved by the methods of Hankel transform and steepest descent, and the general expression of displacement is obtained.
热扩散可以被看成是一种极限温度阻尼振荡问题；而热可以以波动形式传输。
The heat diffuse can be considered as temperature oscillation under limiting damp, as well heat can be transfersed by the wave way.
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