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定义了海浪能量的广义或ｎ阶外观分布，导出了ｎ阶海浪外观谱的解析形式，讨论了ｎ阶外观谱的平衡域。结果表明，ｎ阶外观谱的平衡域指数为－（３＋ｎ）；平衡域指数上界为－３．任何波动现象，只要Ｆｏｕｒｉｅｒ迭加原理和射线理论对它们的描述足够准确，则本文的结论皆成立。
The generalized or n-order appearance distribution of the wave energy is defined. The analytic form of the n-order ocean wave appearance spectrum is derived and the equilibrium domain of the n-order appearance spectrum is discussed. The results show that the equilibrium index of n order appearance spectrum is - (3 + n), and the upper bound of equilibrium domain index is -3. Any fluctuations in the phenomenon, as long as the Fourier superposition principle and ray theory to describe them accurately enough, the conclusion of this paper are established.