Abstract: A data backup method and apparatus, a data recovery method and apparatus, and a storage medium are provided. The data backup method comprises: in response to a full backup command, performing full backup on data stored in a database, so as to generate full backup data (S4100); acquiring an incremental file corresponding to the full backup data, and writing, into the incremental file, a received write command and an execution timestamp of executing the write command (S4200); and backing up the full backup data and the incremental file (S4300).

Abstract: Disclosed is a magnetotelluric inversion method based on a fully convolutional neural network.

Abstract: A method and apparatus for keeping data consistent across different storage systems are provided. The method includes: when a first storage system is updated, processing first data to be unreadable, and generating or updating a version number corresponding to a first primary key; when the first data is unable to be read from a second storage system, acquiring a latest version number of the first primary key, and reading second data from the first storage system; comparing the acquired version number with the latest version number of the first primary key; if consistent, updating the second data into the second storage system using an atomic operation, and updating the version number corresponding to the first primary key; and if inconsistent, re-performing the step of acquiring the latest version number of the first primary key and reading the second data from the first storage system.

Abstract: Disclosed is a magnetotelluric inversion method based on a fully convolutional neural network.

Abstract: An electromagnetic exploration method using a full-coverage anti-interference artificial source, comprising the steps of: (1) determining the scope and location of the measuring area; (2) field-exploring to determine the location of the transmitting source and the angle of the transmitting antenna; (3) calculating the maximum polarization direction angle of the electric field generated by the antenna at each measuring point; (4) arranging electric field sensors according to the polarization directions; (5) calculating the apparent resistivity of each measuring point. The method of the present disclosure obtains the earth resistivity using the reliable data with high signal-to-noise ratio. The field construction is flexible and convenient, the construction efficiency is high and the cost is low. The present disclosure provides a new development direction for the electromagnetic exploration.

Abstract: A WEM-based method for deep resource detection using sky waves refers to the technical field of deep resource detection. The proposed method of deep detection using sky waves improves the traditional “atmospheric-lithosphere” half-space propagation theory into a full-space “sky wave” theory of “ionosphere-atmosphere-rock layer”, that is, the influence of the ionosphere and the displacement current in the air are taken into consideration to obtain a new precise expression of “sky wave” response, which is suitable for full space, slow attenuation and long distance propagation. A receiving device for sky wave signal has been developed. Through theoretical model calculation and actual data measurement, it is known that it is possible to use the sky wave for detection within the scope of China's national territory to realize the high-precision electrical structural exploration within a depth of 10 kilometers and open a new era of artificial source electromagnetic detection.

Abstract: A WEM-based method for deep resource detection using sky waves refers to the technical field of deep resource detection. The proposed method of deep detection using sky waves improves the traditional “atmospheric-lithosphere” half-space propagation theory into a full-space “sky wave” theory of “ionosphere-atmosphere-rock layer”, that is, the influence of the ionosphere and the displacement current in the air are taken into consideration to obtain a new precise expression of “sky wave” response, which is suitable for full space, slow attenuation and long distance propagation. A receiving device for sky wave signal has been developed. Through theoretical model calculation and actual data measurement, it is known that it is possible to use the sky wave for detection within the scope of China's national territory to realize the high-precision electrical structural exploration within a depth of 10 kilometers and open a new era of artificial source electromagnetic detection.