wave energy spectrum

Based on the local characteristics of signals, a local wave method ( LWM) can be employed to obtain the instantaneous frequency of signals and the Hilbert time frequency spectrum composed of an energy time frequency three dimensional distribution.

局域波法是基于信号局部特征，通过该方法可得到信号的瞬时频率和构成能量-时间-频率三维分布的Hilbert时频谱。

Directional wave spectrum is discretized in frequency and direction domain by an energy equalisation method, and calculation is conducted for each wave component.

基于线性波浪理论，将波浪方向谱在频率和方向上按等能量分割法离散后，分别计算各组成波的传播变形，再计算合成波要素。

The statistical properties of ocean waves are studied before the analysis of wave spectrum. The equal energy sampling method is used to get simulation curve of the wave height and angle, for long-crested wave, combined with the expression of wave spectrum.

首先，研究海浪的统计特性，并对海浪进行谱分析，结合海浪谱密度表达式，利用等能量采样法对长峰波随机海浪进行仿真，得到海浪波高及其波倾角的仿真曲线。

Effect of kinematic interaction on spin wave energy spectrum at low temperature

低温下运动学相互作用对自旋波谱的影响