11 results about "Band width" patented technology

The application relates to the technical field of cable insulation detection, and discloses a power cable insulation state evaluation method and system based on multi-dimensional feature fusion, which comprises the following steps: collecting a high-frequency current signal on a cable grounding wire, extracting a power frequency phase, a discharge amplitude and a pulse band width, and performing normalization processing to obtain a sample set; calculating a local sparsity adaptive factor of each sample point, and calculating an energy-weighted local density of each sample point; calculating a relative distance of each sample point, constructing a decision value, and determining a sample point with a larger decision value as a clustering center; calculating a path transmission reliability of a non-clustering center sample point relative to each clustering center, distributing a sample point with a path transmission reliability meeting a preset condition to a corresponding clustering center, and marking the sample point as noise if the preset condition is not met; extracting statistical features according to separated discharge clusters, and evaluating the insulation state of the cable by using a preset fault diagnosis rule library. The application can improve the accuracy of cable insulation state evaluation.

This invention discloses a method, device, and medium for determining bandgap width based on linear region identification. The method includes: acquiring spectral data of the material to be tested and converting the spectral data into a Tauc plot; segmenting the Tauc plot into data segments and calculating the linear correlation coefficient of each data segment; identifying multiple candidate linear regions within the data segments based on the linear correlation coefficient; filtering target linear regions based on the candidate linear regions and performing linear fitting on the target linear regions to obtain the bandgap width of the material to be tested. By segmenting the Tauc plot into data segments and calculating the linear correlation coefficient for linear region filtering, the objectivity, accuracy, robustness, and efficiency of bandgap width determination can be improved, avoiding the errors and inefficiencies of manual bandgap width determination.

To provide a large bundle bill inspection device and method capable of easily and stably inspecting a band interval between a small bundle and a large bundle.SOLUTION: The large-bundle-of-banknotes inspection device 1 includes the image capturing unit 20 that captures the appearance image 600 of the large bundle of banknotes 2 in which the small band 5 and the short-side large band 6b appear, the length calculating unit 55 that calculates the banknote long-edge length L1 of the large bundle of banknotes 2, the first edge length 2C from the left-side edge L2 of the large bundle of banknotes 2 to the small band 5, and the second edge length 2D from the right-side edge 6b of the large bundle of banknotes 2 to the short-side large band L3 from the appearance image 600, and the band interval calculating unit 56 that calculates the band interval L2 based on the banknote long-edge length L1, the first edge length, the second edge length, and the band width size of the small band 5 and the band width size of the short-side large band stored in advance. L3 L6 L4 L5 6b.SELECTED DRAWING: Figure 12

The invention discloses a multi-dimensional optical disk data format design method, which comprises the following steps of: numbering N data layer positions of a multi-dimensional optical disk to obtain layer numbers; each data layer is divided into continuous BANDs from inside to outside, M is larger than or equal to 200, each BAND stores fixed-capacity user data, and 1-3 circles of blank areas are reserved between every two adjacent BANDs to serve as boundary identification bands; the width of the BAND is gradually increased according to a gradient of 0.1-0.7 mm from outside to inside along the radial direction, and the width of the BAND on the innermost side is adaptive to the field of view of the image sensor; dividing the storage structure of each BAND into a BAND head, a data segment and a BAND tail which are arranged in sequence; the BAND head comprises a position identification area and a file information area; the data segment comprises data frames, synchronization frames and error correction frames which are alternately arranged; the BAND tail comprises a filling area and a tail identification area; according to the method, the addressing efficiency, the data extraction accuracy, the storage efficiency and the cross-device compatibility can be remarkably improved, the method is adaptive to a TB-magnitude high-capacity multi-dimensional optical disk, and the requirement for archiving and storing big data is met.

This invention relates to the field of machine vision measurement technology and discloses a high-precision visual measurement method for the bending angle of metal shells based on point cloud registration. A measurement coordinate system is established using reference marker points, and the point cloud after bending is transformed. A reference point set is constructed by filtering boundaries and calculating the reference sampling step size. The average bending height and bending strength are statistically analyzed by width to obtain the initial position of the bending line and the initial bending band width. A continuous bending field is constructed within the candidate range to generate a predicted point cloud, and the registration residual is obtained by comparing the nearest point with the measured point cloud. The compact residual and column height residual are obtained by combining the projection boundary, out-of-band diffusion, and column height comparison. The total residual is constructed and searched multiple times to obtain the optimal bending line, bending angle, and bending band width. The predicted point cloud, registration error, and bending angle are output, reducing segmentation fitting bias, suppressing multi-solution drift, and improving stability and consistency under noise and missing conditions.

The application relates to a communication method and device, which relates to the technical field of communication. The method comprises the following steps: obtaining a first precoding matrix, the first precoding matrix corresponding to a first frequency band; obtaining first information, wherein the first information is used for indicating a first parameter and a second parameter, the first parameter is used for indicating a sub-band width corresponding to the first frequency band, and the second parameter is used for indicating a frequency domain granularity corresponding to the first precoding matrix; based on the first information, sending first channel information, the first channel information comprising second information, the second information being used for indicating N precoding vectors, the N precoding vectors being determined from M first precoding vectors based on the second parameter, the M first precoding vectors belonging to the first precoding matrix, the M first precoding vectors corresponding to M sub-bands, the M sub-bands being determined based on the first frequency band and the first parameter, and M and N being positive integers. The method can improve the feedback performance while reducing the feedback overhead of channel information.

A method of communicating, by a first device, with at least one second device in a wireless local area network (WLAN) system includes allocating at least one resource unit (RU) within a bandwidth to a second device; generating at least one subfield defining the at least one RU; generating a trigger frame comprising a user information field comprising the at least one subfield, and transmitting a PPDU including the trigger frame to the at least one second device, wherein the generating comprises setting at least seven bits associated with the at least one RU and setting at least two bits as a value defining a subband that includes the at least one RU when the band width comprises at least four subbands.

The invention provides an insulation detection method and system for power equipment. The method comprises the steps that a detection pulse signal is injected into a power supply loop, and a mixed response signal is collected; performing time-frequency domain conjoint analysis on the mixed response signal, and separating and extracting frequency band characteristic parameters of a dynamic noise signal in a current working period, including a noise center frequency drift distance, a harmonic energy peak value and a frequency spectrum coverage bandwidth; a filtering algorithm corresponding to the current frequency conversion working condition is obtained through similarity matching, and real-time dynamic filtering parameters are generated, so that the stop-band center and the stop-band width of the parameters are adaptively tracked and updated along with the noise center frequency drift distance and the frequency spectrum coverage bandwidth; filtering the mixed response signal based on the dynamic filtering parameter and a filtering algorithm to obtain a reconstruction signal for the insulation leakage current signal; and calculating a real-time insulation resistance value according to the amplitude and the phase of the reconstructed signal. According to the invention, adaptive tracking and filtering of dynamic noise are realized, and the detection precision of the insulation resistance value under a complex frequency conversion working condition is obviously improved.

This invention belongs to the field of image processing technology, specifically relating to a method and system for detecting defects in drainage pipes based on image processing. The method includes: acquiring an image of the drainage pipe surface; extracting the highlight center skeleton line of the highlight region in the image; selecting multiple sampling points along the skeleton line; generating a vertical cross-sectional line at each sampling point and extracting cross-sectional data; fitting a Gaussian function model based on the cross-sectional data of each sampling point to obtain the optimal standard deviation and calculating the light band width; calculating the kurtosis coefficient based on the cross-sectional data of each sampling point; and weightedly fusing the light band width and kurtosis coefficient to generate a flattening factor, which is then compared with a threshold to determine the defect. This invention effectively decouples the three-dimensional deformation information from the two-dimensional grayscale features, significantly improving the accuracy of detecting flattening defects in drainage pipes.

The present application relates to railway wireless communication equipment test technical field, disclose a kind of radio frequency performance comprehensive test system of railway wireless communication equipment, comprising: interactive configuration module, for extracting multidimensional radio frequency index test matrix and display topological connection instruction;Pre-detection module, for injecting micro-power detection signal and comparing actual measurement topological characteristics, impedance stability factor is extracted when matching succeeds;Frequency sweep test module, for adaptive adjustment data smoothing average number of parameters according to the factor, and generate original waveform data array;Registration extraction module, for correcting registration and extracting actual band width based on historical deviation to waveform;Storage backtracking module, for executing index qualification determination, downsampling storage and reconstructing historical comparison view.The present application effectively avoids hardware damage caused by wiring error through micro-power pre-detection, improves test accuracy and efficiency using adaptive smoothing algorithm, and intuitively reproduces equipment performance degradation trend combined with waveform registration.

Various embodiments herein provide a method for resource allocation, by a server, in multiple Band Width Part (BWP) system. The method includes: receiving a plurality of data packets from a network device for transmission to a UE. Further, the method includes determining a plurality of network parameters associated with the network device, the UE, and the plurality of received data packets. Further, the method includes grouping the plurality of received data packets based on the plurality of network parameters. Further, the method includes allocating a BWP and / or sub-carrier spacing to each grouped data packets based on the plurality of network parameters. Further, the method includes sending the plurality of group data packets using the allocated BWP and / or the allocated subcarrier spacing.