结果：2年以后眼底有改变，所有病例f -VEP振幅均有不同程度降低。
Result, after 2 years, eye ground changed, F-VEP amplitude decrease with different degrees for all cases.
结果表明，极移振幅变化中存在着约6.5年和约40年的主要周期，且它们均具有一定程度的时变性。
The result shows that there are main periods in the amplitude variation, such as about 6.5-year and 40-year, and the periods have the character of variation with time.
振荡频率决定着涡量聚集区域的位置和大小，振幅决定着涡量分配和聚集的均匀程度。
The frequency determines the location and scale of vortices assembling region, and the swing determines uniform degree of distributed and assembled vortices.
数值算例证实了此方法的正确性，计算表明非线性系数的识别精度与非线性程度和初始振幅大小有关。
It is also shown that the identification accuracy for the nonlinear parameter depends on the degree of nonlinearity and the initial amplitude.
结果表明，改进后仪器接收到的地震反射波主振幅、主频率、频带宽度、垂向分辨率及仪器记录信号的有效动态范围均有不同程度的提高。
The results show that the main amplitude, main frequency and frequency band of reflected wavelet and the effective dynamic range of system have different degrees of increase.
弹性波振幅在岩石中的衰减程度受其温压、所含流体性质、流体饱和度、岩石组分、结构等因素的影响。
Attenuation of elastic wave amplitude in rock is affected by its temperature and pressure, filled fluid properties, fluid saturation, rock composition and structure, etc.
发现自变陡效应使增益谱的谱宽变窄、振幅的增长速度减慢，而且其影响程度与色散缓变参量有关。
It is found that the main effect of self steepening is the reduction of the growth rate and the frequency range over which the gain occurs.
发现自变陡效应使增益谱的谱宽变窄、振幅的增长速度减慢，而且其影响程度与色散缓变参量有关。
It is found that the main effect of self steepening is the reduction of the growth rate and the frequency range over which the gain occurs.
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