51 results about "Nonlinear inversion" patented technology

The invention discloses a micro earthquake monitoring and positioning method. The method comprises the steps as follows: seismogenic azimuth angles, where a micro earthquake happens, detected by all detectors are calculated; a first objective function is established according to the azimuth angles, where the micro earthquake happens, detected by all detectors; an initial position (X0, Y0 and Z0) of a micro earthquake incident is estimated on the basis of the inversion of the first objective function; a second objective function is established according to the range from a P wave first arrival and an S wave first arrival of the micro earthquake incident near the initial position (X0, Y0 and Z0); and nonlinear inversion is performed on the second objective function, so that accurate x, y and z coordinates of a focus of the micro earthquake incident are obtained. According to the micro earthquake monitoring and positioning method, the micro earthquake incident positioning problem of the detectors located at a highly-deviated well section can be effectively inversed, and the method has the advantages that the calculation speed is high, an inversion operator is stable, and the like.

Fracture orientation ambiguity in the results of amplitude variation with offset and azimuth inversion is overcome by using additional geological information. Methods, apparatus and executable codes stored on non-transitory media cause, for each interface encountered by traces in a CMP gather, calculating angle-dependent azimuthal Fourier coefficients, performing a nonlinear inversion of amplitude versus offset and azimuth, AVOAz, equations built using the angle-dependent azimuthal Fourier coefficients to determine possible fracture orientations, and selecting one of the possible fracture orientations using constraints based on the additional geological information.

A system and method are disclosed for processing a signal propagated through a nonlinear channel. The method includes modeling the channel characteristics to produce a linearized channel model, deriving an inverse linearized channel model from the linearized channel model, and filtering the signal using the inverse linearized channel model.

Embodiments of the present invention disclose a computer device, method, device and computer-readable storage medium for determining structural parameters of a high-voltage basin-type insulator. The computer device includes a performance parameter acquisition module that acquires the performance parameters of the main body material of the basin-type insulator, and obtains the nonlinear relationship between the performance parameters; and obtains the basin by using the electric-thermal-mechanical performance coupling calculation model constructed based on the finite element method and the nonlinear relationship between the performance parameters. Electric-thermal-mechanical performance coupling calculation module for electric field distribution, temperature distribution and stress distribution of type insulators; multi-physics decoupling calculation module for decoupling calculation of electric field, temperature field and stress field using 3D finite element model; respectively in The electric field, temperature field and stress field are used to simulate the three-dimensional finite element model, and the deep learning network model is used to perform nonlinear inversion of the simulation results to obtain the structural parameter determination module of the optimal structural parameters. This application can effectively guide the structural design of high-voltage basin insulators.

The present invention proposes a quality factor Q nonlinear inversion method and system based on simulated annealing. The method includes: using a double-well micro-logging observation system to obtain micro-logging data; extracting the same shot from the micro-logging data Calculate the attenuation curve of the excited direct wave; by introducing the prior information that the quality factor Q changes with frequency, establish a nonlinear objective function based on the attenuation curve; use the simulated annealing method to nonlinearly invert the parameters in the objective function, and then Find the quality factor Q value that varies with frequency. Compared with the existing technology, the constant Q assumption is avoided, and the frequency-varying Q value is directly calculated, which is conducive to accurately compensating the energy lost by formation absorption, and provides a data basis for high-precision imaging. This method eliminates the error introduced by the inversion method based on the constant Q assumption in the traditional method, and improves the accuracy of Q value calculation. The method utilizes micro-logging data to improve the accuracy and stability of the results.