• 1. The Normal Modes: 第四章
• 2. the equations of normal modes: 简正模方程

• 1.The singular integral equation technique is used to determine the normal modes of propagation in asymmetrical bilateral finlines.
  本文利用奇异积分方程法计算出了非对称双面鳍线的传播常数。
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• 2.In this paper, the sound field of a more general directional radiator in a stratified medium is treated, and the concept of directivity is applied to calculation of the normal modes.
  本文讨论比较一般的指向性辐射器在分层介质中的声场，并将指向性概念应用于简正波计算。
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• 3.The normal modes which can arrive at a receiver are summed according to energy, and an expression for the averaged intensity is then obtained by averaging over the source and receiver depth.
  本文首先把能够到达接收器的那些简正波按能量相加，然后对发射深度与接收深度进行平均，导出了负声速梯度浅海中平均声强的表式。
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