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112 results about "Matrix manipulation" patented technology

The Manipulation Matrix. As Eyal describes, the Manipulation Matrix is a simple tool for entrepreneurs, employees, and investors to assess the value of their product to the consumer.

Material microstructure image-based method for automatic mesoscale crack statistics

The invention discloses a material microstructure image-based method for automatic mesoscale crack statistics, which belongs to the field of mesoscale materials science and can simply and accurately perform quantitative crack statistics. The method comprises the following steps: firstly, subjecting a material microstructure image to gray-level matrix treatment, establishing a finite element grid unit corresponding to the pixel points of the material microstructure image and searching all crack units according to the generated finite element grid unit; secondly, recognizing all crack strips in the finite element grid unit according to the result of the research and coding cracks; and finally, performing the length and angle statistics of each crack and outputting data information on crack strips to a result file. The method of the invention can acquire shape and distribution information including crack number, crack length and crack angle on the cracks in an actual material microstructure image and can be directly used in mesoscale material performance finite-element simulation for further study of the relationship between the crack length, crack orientation and the like and basic physical and mechanical properties.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Amplitude-phase error correction method for phased array three-dimensional camera shooting sonar system energy converter array

ActiveCN103323832AHigh amplitude and phase error correction accuracyAvoid cumbersome iterationAcoustic wave reradiationArray data structureFilter algorithm
The invention discloses an amplitude-phase error correction method for a phased array three-dimensional camera shooting sonar system energy converter array. The method comprises the following steps: utilizing two-dimensional fast Fourier transform to acquire original estimation of normalization angular frequency for two-dimensional compound sampling array of a kth sampling snapshot; based on the original estimation, acquiring the estimation value of the normalization angular frequency with higher precision in various sampling snapshots; conducting arithmetic mean on the estimation value of the normalization angular frequency of K times sampling snapshots so as to acquire the robust estimation of the orientation of a corrected source; utilizing the robust estimation and the spatial matched filtering algorithm to estimate amplitude-phase error factors of various energy converter passages in an energy converter array; utilizing the amplitude-phase error factors to compensate compound sampling signals in various energy converter passages, and finally utilizing the number wave beam forming algorithm to acquire three-dimensional camera shooting sonar wave beams going through amplitude-phase error correction. The amplitude-phase error correction method avoids heavy and complicated iteration and matrix manipulation and is small in calculated amount and suitable for on-site correction of large energy converter array in a three-dimensional sonar system.
Owner:ZHEJIANG UNIV
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