风,地球旋转的结果和另外的过程,使海洋的内部波浪(OIW ) 的现象就职包括驾驶骚乱,影响营养素和生物资源分发,和重新推迟的沉积。因此,到 OIW 的人物的好理解成为一个重要部件提高它监视和利用。参数倒置基于实验模式分解(EMD ) 为 OIW 在文章被进行方法。试验性的数据,先进的合成的孔雷达(ASAR ) 图象,在在 2011 年 7 月 22 日包围区域的 Dongsha 岛被捕获。就内部波浪的形成机制而言,在 EMD method—the 曲线试穿和结束 effects—were 的二个重要问题学习了。在比较不同算法以后,立方的花键插值(CSI ) 被用于曲线适合和边界完整波浪(BFW ) 方法被使用禁止结束效果。使用这个倒置方法,内部波浪信号从 ASAR 图象被提取,在山峰和马槽之间的内部波浪的距离被计算,并且 soliton 的一半宽度也被获得。另外,倒置结果与以前的试验性的调查结果一致,它显示我们的算法的有效性。
Wind, the result of earth rotation and other processes,inaugurate the phenomenon of oceanic internal waves(OIWs), including driving turbulence, affecting nutrient and biomass distribution, and resuspending sediment. Therefore, a good understanding to OIWs' characters becomes a vital component to enhance its monitoring and utilization. The parameter inversion was conducted in the article for the OIW based on the empirical mode decomposition(EMD) method. The experimental data, the advanced synthetic aperture radar(ASAR) image, was captured in Dongsha Islands surrounding area on July 22, 2011. Considering the formation mechanism of internal waves, two important issues in the EMD method-the curve fitting and end effects-were studied. After comparing different algorithms, the cubic spline interpolation(CSI) was used for curve fitting and the boundary full-wave(BFW) method was applied to inhibit the end effects. Used this inversion method, the internal wave signal was extracted from the ASAR image, the distance of the internal wave between peak and trough was calculated, and the half-width of soliton was obtained as well. In addition, the inversion result is consistent with the previous experimental findings, which indicates the effectiveness of our algorithm.