然而，局部解析坐标变换方法需要满足在两个相邻界面之间存在一条水平直线的介质可分性条件。

In this paper, an analytical local orthogonal. coordinate transform and an analytical equation transform are constructed to flatten the interfaces and change the Helmholtz equation as a solvable form.

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该文分析了非线性混叠信号的可分离性及分离条件，指出现阶段非线性混叠信号盲分离的局限性。

The separability and separating conditions for mixed signals are analyzed in this paper. The limitation of nonlinear blind source separation methods is proposed.

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影响经纱可织性的因素很多，大致可分为三类：原纱质量、经纱准备和织造条件。

These factors can be broadly classified into the following three classes: yarn quality, condition of warp preparatory, and loom actions and conditions.

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