nonhomogeneous media meaning in Chinese
非均匀介质
Examples
- 2 . the approximate method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium is constructed
(二)构造了利用小波变换简化二维非均匀缓变介质中波动方程的近似方法。 - Change in the direction of propagation of radiation determined by change in the velocity of propagation in passing through an optically nonhomogeneous medium , or in passing from one medium to another
当辐射通过光学异性的界面，或从一种媒质进入另一种媒质时，传播速度的改变而导致的辐射传播方向的改变。 - The important parts of this work consist of : 1 . the high frequency asymptotic evaluation of wave equations in nonhomogeneous medium by maslov ' s method is systematically studied , and formulations of the high frequency asymptotic evaluation in nonhomogeneous medium which varying only in one direction are constructed
本论文的工作作为国家自然科学基金地震波传播与成像项目( no . 40174032 )的一部分，得到如下结果： (一)论文分析了利用maslov方法求解非均匀介质中波动方程高频近似解的基本原理和求解过程，构造了介质系数只在一个方向变化时波动方程高频近似解的通用计算公式。 - This thesis discusses maslov ' s method , wavelet transform and their applications to asymptotic evaluation of wave equations in high frequency fields . the method of solving wave equations in caustic domain by symplectic geometrical theory , and the method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium by wavelet - transform theory are proposed . the caustics phenomena of electromagnetic wave propagation in concave reflector , the singularities of caustics , and the method of computing wave fields in and far away from the caustics in concave reflector are also discussed
本论文探讨了maslov方法在波动方程高频近似中的应用及焦散区的具体求解方法；讨论了用小波变换化简二维非均匀缓变介质条件下的波动方程；本文还讨论了凹面反射的焦散现象、凹面反射焦散区的奇性种类，讨论了二、三维凹面反射波动场非焦散区、焦散区的计算方法。 - Being local in space and frequency , and some even compactly supported , wavelets are used to simplify the wave equations in slowly varying nonhomogeneous medium , and transfer the problem of solving two - dimension wave equations into a series of one - dimension problems , after words , the method in 1 can be applied to solve it . as a result , the complexity of the problem and the difficulty in solving it are largely reduced
利用小波变换在空间域和频率域上具有局部性的特点，通过小波展开，把二维非均匀问题转化为一系列一维非均匀问题，然后利用在(一)中得到的通用计算公式求解，大大降低了问题的复杂性和难度。
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