43results about How to "Increase inversion speed" patented technology

The present disclosure provides a data reconstruction method based on Radon domain sparse representation and related equipment, relating to the technical field of communication. The method comprises: obtaining low-resolution Radon coefficients; inputting the low-resolution Radon coefficients into a neural network of an encoding-decoding structure to obtain first high-resolution Radon coefficients; and increasing the sparsity of the first high-resolution Radon coefficients through an adaptive soft threshold function cascaded at the back end of the neural network to obtain second high-resolution Radon coefficients. The method can reduce the data size, operation time, and operation cost of time-domain inversion of reduced-time variable Radon transform, and improve the stability and resolution of reconstructed data.

The invention discloses a reflected wave wave equation travel time inversion speed modeling method and a related device, and belongs to the technical field of oil exploration. The method comprises the following steps: acquiring observation shot record data and an initial velocity field; performing cross-correlation on a seismic source wave field of the initial velocity field and a detection point wave field of observation shot record data to obtain a migration imaging result; carrying out demigration by utilizing a migration imaging result and the initial velocity field to obtain synthetic shot record data; measuring travel time difference between the synthetic shot record data and the observation shot record data, and constructing an adjoint source of reflected wave travel time inversion; and constructing an inversion gradient according to the initial velocity field and the adjoint source, iteratively updating the background velocity field based on the inversion gradient, and applying the updated background velocity field to full waveform inversion to obtain a final underground structure inversion modeling result. According to the method, wave equation reflected wave inversion is introduced into a travel time inversion idea, so that the phase difference in inversion can be corrected, good background speed information is constructed, and the modeling accuracy is improved.