Abstract: A random transient power test signal generator based on three-dimensional memristive discrete map, which utilizes a three-dimensional parallel bi-memristor Logistic map module to generate two pseudo-random sequences, and based on the sequences, uses two waveform output modules to generate transient voltage and transient current signals respectively, thus the random transient power testing signal is obtained. The map can significantly improve the complexity of chaos and greatly extend its range of chaos. In addition, a performance evaluation shows the map has more robust hyperchaotic behavior in much larger chaos range. Moreover, the random sequences generated by the map module combines with DDS, which can generate a transient power signal with completely random period, starting phase and ending phase.

Abstract: A data acquisition and reconstruction method and a data acquisition and reconstruction system for human body three-dimensional modeling based on a single mobile phone. In the aspect of data acquisition, the present application only uses a single smart phone, and uses augmented reality technology to guide users to collect high-quality video data input for a reconstruction algorithm, so as to ensure that the subsequent human body reconstruction algorithm can stably obtain a high-quality three-dimensional human body model. In the aspect of a reconstruction algorithm, the present application designs a deformable implicit neural radiance field. The use of an implicit spatial deformation field estimation model solves the problem that the subject has small motion in the process of collecting data with a single mobile phone; the implicit signed distance field is used to represent human geometry, which has rich expressive ability and improves the accuracy of three-dimensional human model reconstruction.

Abstract: A method for intelligently measuring vehicle speed based on a binocular stereo vision system includes: training a Single Shot Multibox Detector neural network to obtain a license plate recognition model; calibrating the binocular stereo vision system to acquire parameters of two cameras; detecting the license plates in the captured video frames with the license plate recognition model, locating the license plate position; performing feature point extraction and stereo matching by a feature-based matching algorithm; screening and eliminating the matching point pairs, and reserving the coordinates of the matching point pair closest to the license plate center; performing stereo measurement on the screened matching point pair to get the spatial coordinates of the position; calculating and obtaining the speed of the target vehicle.

Abstract: A tetrahedral interpolation calculation method and apparatus, a gamut conversion method and apparatus, and a medium are provided, the tetrahedral interpolation calculation method comprising: obtaining coordinates of an interpolation point in a sampling space, a side length of a cube formed of nearby eight sampling points surrounding the interpolation point in the sampling space, and mapping values of four vertices of a tetrahedron surrounding the interpolation point, wherein the four vertices are four out of the eight sampling points; calculating a volume of the tetrahedron, and volumes of four sub-tetrahedrons formed of the interpolation point and arbitrary three vertices in the tetrahedron, based on coordinates of the interpolation point in the sampling space, and the side length of the cube formed of nearby eight sampling points surrounding the interpolation point in the sampling space; and obtaining an interpolation value of the interpolation point, based on a tetrahedral interpolation theorem formula, th

Abstract: A method for optimizing HDR video display processing comprises: acquiring original video stream data; decoding the original video stream data to obtain metadata and image frame data of each image frame; in an m-th iteration, for each image frame, according to a characteristic parameter of a target display panel and the metadata, performing HDR processing on the image frame data by using an HDR video display processing algorithm, to obtain the image frame data subjected to HDR processing and corresponds to the original video stream data in the m-th iteration; and according to a playing display detection result, on the target display panel, of the image frame data that has been subjected to HDR processing and is obtained in the m-th iteration, optimizing an algorithm used in an (m+1)th iteration until the optimization of the HDR video display processing algorithm is completed.

Abstract: Techniques manage log data. Such techniques involve receiving log data describing a state of an application system at a target time point. Such techniques further involve determining whether a level of the log data satisfies a predetermined level. Such techniques further involve, in response to determining that the level of the log data satisfies the predetermined level, storing log data within a predetermined range adjacent to the target time point to a log repository of the application system, the predetermined range indicating the amount of log data expected to be stored.

Abstract: A tetrahedral interpolation calculation method and apparatus, a gamut conversion method and apparatus, and a medium are provided, the tetrahedral interpolation calculation method comprising: obtaining coordinates of an interpolation point in a sampling space, a side length of a cube formed of nearby eight sampling points surrounding the interpolation point in the sampling space, and mapping values of four vertices of a tetrahedron surrounding the interpolation point, wherein the four vertices are four out of the eight sampling points; calculating a volume of the tetrahedron, and volumes of four sub-tetrahedrons formed of the interpolation point and arbitrary three vertices in the tetrahedron, based on coordinates of the interpolation point in the sampling space, and the side length of the cube formed of nearby eight sampling points surrounding the interpolation point in the sampling space; and obtaining an interpolation value of the interpolation point, based on a tetrahedral interpolation theorem formula, th

Abstract: Method and apparatus for de-interlacing a television signal are provided. The method includes: determining whether a pixel to be interpolated is in a strictly static mode; if it is in the strictly static mode, obtaining a pixel value of a first pixel in a previous field which corresponds to the pixel to be interpolated, and setting a pixel value of the pixel to be interpolated to be equal to the pixel value of the first pixel; if it is not in the strictly static mode, determining gradient bands along a plurality of directions by taking the pixel to be interpolated as a center, determining a direction of the pixel to be interpolated based on the gradient bands, and setting the pixel value of the pixel to be interpolated by interpolation based on the direction. Accuracy of the pixel value of the pixel to be interpolated may be improved.

Abstract: Method and apparatus for de-interlacing a television signal are provided. The method includes: determining whether a pixel to be interpolated is in a strictly static mode; if it is in the strictly static mode, obtaining a pixel value of a first pixel in a previous field which corresponds to the pixel to be interpolated, and setting a pixel value of the pixel to be interpolated to be equal to the pixel value of the first pixel; if it is not in the strictly static mode, determining gradient bands along a plurality of directions by taking the pixel to be interpolated as a center, determining a direction of the pixel to be interpolated based on the gradient bands, and setting the pixel value of the pixel to be interpolated by interpolation based on the direction. Accuracy of the pixel value of the pixel to be interpolated may be improved.

Abstract: A method of dithering of an image is described. The method includes analyzing each of a plurality of pixels of the image, wherein each pixel of the plurality of pixels exhibits integer value N-bit color depth and determining a particular index value of each pixel of the image, a particular numerical value associated with a particular color component of each pixel of the image, and a particular threshold value associated with the particular color component of each pixel of the image. The particular threshold value is common between pixels of the image separated by a predetermined number of pixels. The method further includes modifying, based on the determining, each of the plurality of pixels of the image to exhibit integer value M-bit color depth, wherein integer value M is less than integer value N.

Abstract: A steam generator includes a heat exchanger, a liquid header and a steam header. The heat exchanger is assembled by several heat exchanging subassemblies with the same structure. The heat exchanging subassembly includes a spiral heat transmission pipe bundle, a central cylinder and a sleeve. The spiral heat transmission pipes with different radii are concentrically and spirally arranged in an annular space between the central cylinder and the sleeve, to form one or more concentric heat exchanging pillar surfaces. One end of the liquid header is connected with a main water feeding pipe, and the other end of the liquid header is connected with the spiral heat transmission pipe bundle. One end of the steam header is connected with a main steam pipe, and the other end of the steam header is connected with the spiral heat transmission pipe bundle.

Abstract: A method of dithering of an image is described. The method includes analyzing each of a plurality of pixels of the image, wherein each pixel of the plurality of pixels exhibits integer value N-bit color depth and determining a particular index value of each pixel of the image, a particular numerical value associated with a particular color component of each pixel of the image, and a particular threshold value associated with the particular color component of each pixel of the image. The particular threshold value is common between pixels of the image separated by a predetermined number of pixels. The method further includes modifying, based on the determining, each of the plurality of pixels of the image to exhibit integer value M-bit color depth, wherein integer value M is less than integer value N.

Abstract: A steam generator includes a heat exchanger, a liquid header and a steam header. The heat exchanger is assembled by several heat exchanging subassemblies with the same structure. The heat exchanging subassembly includes a spiral heat transmission pipe bundle, a central cylinder and a sleeve. The spiral heat transmission pipes with different radii are concentrically and spirally arranged in an annular space between the central cylinder and the sleeve, to form one or more concentric heat exchanging pillar surfaces. One end of the liquid header is connected with a main water feeding pipe, and the other end of the liquid header is connected with the spiral heat transmission pipe bundle. One end of the steam header is connected with a main steam pipe, and the other end of the steam header is connected with the spiral heat transmission pipe bundle.

Abstract: A steam generator includes a heat exchanger, a liquid header and a steam header. The heat exchanger is assembled by several heat exchanging subassemblies with the same structure. The heat exchanging subassembly includes a spiral heat transmission pipe bundle, a central cylinder and a sleeve. The spiral heat transmission pipes with different radii are concentrically and spirally arranged in an annular space between the central cylinder and the sleeve, to form one or more concentric heat exchanging pillar surfaces. One end of the liquid header is connected with a main water feeding pipe, and the other end of the liquid header is connected with the spiral heat transmission pipe bundle. One end of the steam header is connected with a main steam pipe, and the other end of the steam header is connected with the spiral heat transmission pipe bundle.