8 results about "Orthogonal array" patented technology

The application discloses a two-dimensional Root-MUSIC angle automatic pairing method and system based on signal receiving timing, and specific steps of the method are as follows: step 1, a Root-MUSIC algorithm mathematical model suitable for angle estimation of two orthogonal arrays of an L-shaped array is constructed, the Root-MUSIC algorithm is applied to the two orthogonal arrays respectively, and a set of azimuth angles and a set of elevation angles are estimated; step 2, timing detection and dynamic grouping are carried out based on signal arrival timing, and simultaneous multi-signal receiving processing is converted into a single-signal processing flow organized according to timing; the Root-MUSIC algorithm is executed on each group of signals, and pairing of the azimuth angles and the elevation angles is automatically completed; and step 3, the pairing result of step 2 is stored, and whether the pairing process is ended is judged, if yes, the angle pair is output in sequence. The application constructs a joint processing mechanism of timing detection-dynamic grouping-serial processing, converts traditional multi-dimensional matching calculation into a simple timing alignment operation, and makes angle pairing become a natural derivative result of the signal processing flow.

The invention relates to an assembly type wall surface component mounting method, which belongs to the technical field of assembly type wall surface mounting, and comprises the following steps of: delimiting an annular belt region formed by extending inwards along the outer boundary of the periphery of a wall surface as a first peripheral reinforcing region, and delimiting an annular belt region which is adjacent to the inner edge of the first peripheral reinforcing region and surrounds the first peripheral reinforcing region as a second transition buffer region; the wall surface except the first peripheral reinforcing area and the second transition buffer area is defined as a third center balance area, accurate matching is achieved through partition design, high-strength support is provided for a bidirectional orthogonal array of the peripheral areas, and the wavy layout of the transition areas not only guarantees necessary support but also forms a flexible buffer zone, so that the overall performance of the wall surface is improved. The expanded grids in the central area can maintain basic support and reduce material consumption at the same time, so that the deformation risk caused by insufficient support in the edge area of the wall surface is effectively solved, and the problems of material waste and plate internal stress caused by too dense fixed points in the central area are eliminated.

Provided is a parameter output method and the like for improving user convenience related to orthogonal arrays. 【Solution means】The method obtains a first reference value r and a second reference value s from among two or more positive integers, selects a pair of a first integer q and a second integer n that satisfy both formula (A) and formula (B), selects the first integer q as a candidate value for the number of levels, and based on the selected first integer q, the second integer n that forms a pair with the first integer q, formula (C), and formula (D), determines and outputs candidate values for each of the number of samples M and the number of factors N, and based on each of the output candidate values, generates a matrix of M rows and N columns or N rows and M columns composed of M-dimensional and N vectors of the q-level system, and selects and outputs a matrix that holds as an orthogonal array as a non-mixed orthogonal array L M (q N ) for selection and output. q≧r…(A) (q n -1) / (q-1)≧s…(B) M=q n …(C) N=(q n -1) / (q-1)…(D)

The invention provides a switching power supply system-oriented efficient global optimal multi-physics co-simulation method and system, and the method comprises the steps: defining a hybrid design space containing discrete variables and continuous variables, and constructing a composite objective function; generating a small number of parameter combinations of the discrete variables and the continuous variables by adopting a mixed horizontal orthogonal array to form an initial sample set; performing multi-physical field simulation on the initial sample set to obtain a performance observation value; constructing an initial Gaussian process proxy model based on the initial sample set and the performance observation value; a discrete forced continuous random sampling strategy is adopted to generate a large number of global uniform samples, iteration is carried out through a Bayesian optimization framework based on the initial Gaussian process proxy model, and optimal candidate points are obtained; and when the composite objective function converges or reaches the maximum number of simulation times, outputting a global optimal design parameter combination.

The invention provides a convolution beam space DOA estimation method based on hole filling, so as to solve challenges faced by a traditional convolution beam space method. According to the algorithm, differential common array holes are filled through low-rank matrix recovery, a solving framework is constructed through an alternating direction multiplier method, and a multi-phase component averaging strategy based on a sliding window is designed for the extraction process. Simulation results show that the method solves the problem that the precision of a traditional convolution beam space method is reduced, and only negligible extra time overhead is introduced. Through comparison, the performance of the provided method is better than that of a traditional convolution beam space method and a method based on atom norm minimization and CVX toolbox solving, and the advantages are crucial for realizing real-time and high-precision DOA estimation in a large-scale extended co-prime array scene.

The application discloses a high-order off-grid DOA estimation method and system based on an extended coprime array and belongs to the field of polar water sound detection. The method comprises the following steps: acquiring signals received by the extended coprime array to form a receiving data matrix; introducing a phase fraction low-order moment method to construct a phase fraction low-order moment matrix C, vectorizing C, removing redundancy and rearranging to obtain a single-snapshot continuous virtual uniform linear array signal vector z1; based on z1, using a division method of an overlapping subarray to construct a multiple measurement signal vector matrix Z; using a high-order Taylor expansion term to construct an off-grid model, using an extrapolation-based iterative sparse projection algorithm to jointly estimate a sparse signal matrix and a grid offset according to the matrix Z, and estimating the DOA of a target. The application provides a new solution to the problems of performance decline of a conventional DOA estimation method in a polar pulse noise environment and a limited number of detectable targets of a traditional uniform linear array.

The application provides a jet transient sound field reconstruction method based on an equivalent source and a convolution network, comprising the following steps: arranging a three-dimensional orthogonal array and an arc-shaped array in a jet sound field, synchronously collecting measurement data, including sound pressure data and coordinate data; in the interpolation time-domain equivalent source part, arranging a plurality of equivalent sound sources near the jet sound field, solving time-domain equivalent source strength by using coefficient regularization, and then reconstructing the jet sound field by using an interpolation processing mode; in the time-domain convolution network part, constructing a sound propagation function training network of the jet sound field, and fusing the reconstruction data of the interpolation time-domain equivalent source and the measurement data of the arc-shaped array into a training set of the network; taking the sound pressure data of the reconstruction point obtained by the interpolation time-domain equivalent source and the sound pressure data of the arc-shaped array as output verification parts of the time-domain convolution network, and obtaining the sound pressure data, the coordinate data and the radiation sound field of the reconstruction point by iterative updating of the time-domain convolution network. The application realizes high-precision reconstruction of a time-varying radiation sound field of jet noise.

The invention belongs to but is not limited to the technical field of radio detection direction finding, and discloses an omni-directional unambiguous direction finding method, device and system based on a rotating baseline, the method and the device form a spatial orthogonal array structure by four omni-directional antenna units, and a horizontal baseline and a vertical baseline can be adaptively adjusted. According to the device, a high-precision rotating mechanism drives an array to rotate at a constant speed, and a four-channel synchronous receiver is combined to construct multiple groups of measurement baselines. The method comprises the following steps: pre-calibrating and establishing a channel phase deviation compensation table; collecting data in real time and calculating the phase difference of each baseline; correcting phase ambiguity by adopting a first-order difference decomposition ambiguity algorithm; constructing a direction cosine matrix based on the geometrical relationship; an equation set is established through observation values at multiple moments, a target direction vector is solved through an optimization algorithm, and finally non-fuzzy accurate estimation of the azimuth angle and the pitch angle is achieved. The method solves the problem that a traditional system cannot realize full-space direction finding, and has the advantages of high precision, strong robustness and good adaptability.