High-resolution sound velocity profile sparse coding and storage method based on dictionary learning

Abstract

The invention belongs to the technical field of marine acoustics application of three-dimensional temperature-salinity-depth data, and particularly relates to a high-resolution sound velocity profile sparse coding and storage method based on dictionary learning. The implementation process comprises calculating the seawater sound velocity profile data of a global sea area; traversing all longitudes and latitudes to uniformly extend the data depth to a seabed sedimentary layer; sequentially arranging and combining a target matrix according to the sampling moments under different longitude and latitude grid points; performing sparse coding on an original data matrix by using an over-complete dictionary; and carrying out CSR storage on a sparse matrix. According to the method, a compression storage technology is provided for the large-scale sound velocity profile data based on global high-resolution ocean reanalysis products, and the data application and communication are facilitated; under the condition that data errors are ensured, the related data is greatly compressed, and the beneficial effect that more than 80% of the high-resolution and long-time sequence sound velocity profile data is compressed is obtained.

Description

technical field [0001] The invention belongs to the technical field of marine acoustics application of three-dimensional temperature, salinity and depth data, in particular to a sparse coding and storage method for high-resolution sound velocity profiles based on dictionary learning. Background technique [0002] The speed of sound in seawater is a marine environmental parameter that has an important impact on sound propagation in the ocean. In the field of marine acoustics application technology, underwater acoustic field research, underwater acoustic target detection, underwater acoustic signal propagation and acoustic performance calculation and evaluation all need to be based on the relevant data provided by the sound velocity profile. The high-precision sound velocity profile is more conducive to the related research of marine acoustics, improves the accuracy of various applications, and provides a strong guarantee for the inversion and testing of the marine environment...

AI Technical Summary

Problems solved by technology

The above-mentioned patents or research content have carried out certain research on the representation and characteristic exploration of the sound velocity profile, but from the aforementioned research content and practical application analysis process, it can be found that due to the large ocean area, irregular depth changes, and large parameter differences, this leads to In the process of research and analysis, it is often necessary to face and process a large amount of basic data, which has an adverse impact on the cost and efficiency control of the aforementioned work. The huge amount also puts a lot of pressure on the system to read and use data

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