Abstract: A semi-airborne electromagnetic survey device and a semi-airborne electromagnetic survey method based on coaxial coplanar mutual reference coil assembly are provided. The device includes a measuring coil and a reference coil with linear correlation of additive motion noise; the reference coil and the measuring coil have a same bandwidth, are coaxial and coplanar and are in hard connection or soft connection; detection resolution of the reference coil only distinguishes the additive motion noise; detection resolution of the measuring coil distinguishes real vertical magnetic field signals and motion noise simultaneously; the reference coil has a much smaller outer diameter than the measuring coil. In the method, one coil only receives the additive motion noise, and an other coil simultaneously receives the additive motion noise and the real vertical magnetic field signals; and the additive motion noise received by the two coils is cancelled to obtain the real vertical magnetic field signals.

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

Abstract: The present disclosure provides a real-time correction method for an Oven Controlled Crystal (Xtal) Oscillator (OCXO) and an electromagnetic receiver. The real-time correction method for an OCXO includes: performing frequency multiplication on a reference clock signal to generate a first measurement signal and a second measurement signal; identifying a rising edge of each pulse per second on the basis of the first measurement signal to obtain a gate time T; obtaining a frequency of the second measurement signal according to the gate time T; and adjusting a frequency of the reference clock signal at least on the basis that an absolute value of a difference between two adjacent frequencies obtained of the second measurement signal is greater than a standard frequency difference.

Abstract: Disclosed is an ocean bottom electromagnetic acquisition station communication apparatus and method. The ocean bottom electromagnetic acquisition station communication apparatus includes: ocean bottom electromagnetic acquisition stations (1) for acquiring ocean bottom electromagnetic information; a control terminal (2) for sending control signals; and a relay timing module (3) connected to the ocean bottom electromagnetic acquisition stations (1) and the control terminal (2) and used for processing the ocean bottom electromagnetic acquisition stations (1) on the basis of the control signals before placement.

Abstract: The present disclosure provides a real-time correction method for an Oven Controlled Crystal (Xtal) Oscillator (OCXO) and an electromagnetic receiver. The real-time correction method for an OCXO includes: performing frequency multiplication on a reference clock signal to generate a first measurement signal and a second measurement signal; identifying a rising edge of each pulse per second on the basis of the first measurement signal to obtain a gate time T; obtaining a frequency of the second measurement signal according to the gate time T; and adjusting a frequency of the reference clock signal at least on the basis that an absolute value of a difference between two adjacent frequencies obtained of the second measurement signal is greater than a standard frequency difference.

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

Abstract: Disclosed is an ocean bottom electromagnetic acquisition station communication apparatus and method. The ocean bottom electromagnetic acquisition station communication apparatus includes: ocean bottom electromagnetic acquisition stations (1) for acquiring ocean bottom electromagnetic information; a control terminal (2) for sending control signals; and a relay timing module (3) connected to the ocean bottom electromagnetic acquisition stations (1) and the control terminal (2) and used for processing the ocean bottom electromagnetic acquisition stations (1) on the basis of the control signals before placement.

Abstract: The present invention discloses a method and apparatus for simulating and designing structural parameters of an air-core coil. The method for simulating and designing structural parameters of the air-core coil includes: building an impedance function of the air-core coil according to a structural parameter variable, the air-core coil being of a differential structure and being wound in a completely parallel winding fashion; building an index function of the air-core coil by calculating an equivalent bandwidth, sensitivity and an equivalent noise power spectrum by means of the impedance function. The method is intuitive, and makes calculation of the optimized technological and structural parameters easier and more convenient, thus reducing the amount of calculation and shortening the calculation time.

Abstract: A video overlay switching apparatus and method utilizes a common video scaler that receives input video data. A programmable switching mechanism, such as a register-controlled multiplexer, receives video information from the video scaler, either scaled video or unscaled video, and selectively routes the video data to any one of a plurality of video overlay generators to facilitate selective display of overlay data on a specified display device. The programmable switching mechanism also facilitates programming of frame buffer space for each display engine, based on which video overlay generator has been selected to receive input video.

Abstract: In accordance with a first mode of operation of the present invention, a portrait image is received from a system device. The portrait image is translated and stored within the graphics engine memory such that it can be displayed on a landscape monitor that has been rotated 90 degrees. Likewise, when portrait data stored within the memory is sent to the system it is translated such that it is sent back in the same format received by the system. In a second mode of operation in accordance with the present invention, a landscape image received by the graphics adapter is stored in the graphics adapter memory without any translation.

Abstract: A method of scan conversion comprising (a) receiving source data representing a predetermined signal component of respective pixels of successive lines of a non-interlaced display, (b) adding the source data related to vertically adjacent pixels in a set of source lines of the non-interlaced display to form one of an odd and even line of an interlaced display, (c) repeating step (b) for another immediately following set of source lines to form another one of the odd or even line of the interlaced display, and (d) repeating steps (a), (b) and (c) successively to an end of an odd or even field of the interlaced display.