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这里为提高地震记录的分辨率,补偿高频成份提供了一种新的分频频率振幅补偿方法。通过对地震记录进行广义S变换后得到分频后的信号,对分频信号进行频率补偿,扩展地震记录的频宽,同时对频率补偿后的地震记录进行振幅补偿。实际资料处理结果表明,此方法在保持低频成份的同时,对高频成份进行了补偿,使地震记录的分辨率得到了明显提升,从而证明了该方法的可行性和有效性。 相似文献
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To deal with the moving boundary hydrodynamic problems of the tidal flats in shallow water flow models, a new wetting and drying (WD) method is proposed. In the new method, a “predicted water depth” is evaluated explicitly based on the simplified shallow water equations and used to determine the status (wet or dry) together with the direction of flow. Compared with previous WD method, besides the water elevation, more factors, such as the flow velocity and the surface shear stress, are taken into account in the new method to determine the moving boundary. In addition, a formula is deduced to determine the threshold, as critical water depth, which needs to be preset before simulations. The new WD method is tested with five cases including three 1D ones and two 2D ones. The results show that the new WD method can simulate the wetting and drying process, in both typical and practical cases, with smooth manner and achieves effective estimation of the retention volume at shallow water body. 相似文献
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