48 results about "Separable denominator" patented technology

The invention relates to the technical field of video recognition and analysis, and discloses a video recognition and analysis method based on physical characteristics. Video frame pixels are mapped to a two-dimensional coordinate system with the upper left corner as an original point, and mirror image expansion and median filtering are carried out on a gray level image; constructing a binary image based on a gray threshold value, and analyzing and extracting a target region by using a four-neighborhood connected domain; using neighborhood search and polar angle sorting to close the tracking contour, and generating equidistant re-sampling points based on Euclidean distance and an interpolation method; the curvature of the re-sampling points is estimated through a three-point difference algorithm, and zero denominator is avoided through numerical protection; performing discrete Fourier transform on the curvature sequence to extract a frequency spectrum, and normalizing an amplitude to form a standardized feature vector; and finally, inter-frame similarity is calculated based on the feature vector, and the most similar frame is automatically retrieved. By processing unified data standards in stages, edge noise is suppressed, sampling uniformity is ensured, and feature stability and cross-frame comparability are improved.

The embodiments relate to a method for encoding / decoding, the method comprising encoding / decoding (910) a picture comprising a number of samples, wherein a phase of the encoding / decoding comprises a division operation; determining (920) a numerator and a denominator; determining (930) an approximated output for the division operation between the numerator and the denominator, wherein the determining comprises deriving a scale parameter using a piecewise approximation; deriving a shift parameter and a rounding parameter, and applying the scale parameter, the shift parameter, and the rounding parameter to the numerator; using (940) the approximated output for the division operation in said phase of the encoding / decoding. The embodiments also relate to an apparatus and a computer program product for implementing the method.

The invention discloses a direct digital synthesis method and system based on a mixed fraction proportion. The method comprises the following steps: determining an integer frequency control word, a numerator frequency control word and a denominator frequency control word based on a target frequency, a sampling frequency and a bit width of a phase accumulator; performing a fractional phase accumulation operation based on the sampling frequency, the molecular frequency control word, and the phase accumulator to generate a carry signal; performing integer phase carry and accumulation operation in parallel with the fractional phase accumulation operation according to the sampling frequency, the integer frequency control word and the phase accumulator to obtain an integer phase value; and acquiring a waveform digital amplitude corresponding to the integer phase value, and performing signal conversion according to the waveform digital amplitude to obtain an amplitude signal corresponding to the target frequency so as to improve the precision of the frequency synthesis signal.

The invention provides a real-time interaction-oriented index aperture unified processing method, computer equipment and a computer program product, and belongs to the technical field of artificial intelligence, and the method comprises the following steps: receiving and analyzing a dictation request of a user, and generating a structured context state vector; based on the context state vector, obtaining a plurality of candidate denominator calibers matched with the dictation request and a basis thereof from a calibers knowledge base; generating a constraint strategy set based on the context state vector, the candidate denominator caliber and the basis thereof; based on a constraint strategy set, performing consistency judgment through the candidate denominator calibers to determine a unique denominator caliber; based on the unique denominator caliber, generating an index description format final draft, and embedding a restriction rule for prohibiting visual comparison of inconsistent indexes into the index description format final draft; and rendering in a data visualization interface according to the index description format finalization and the restriction rule thereof, and intercepting and guiding the parallel display operation violating the restriction rule in real time.

The application discloses a numerically controlled oscillator based on double modulus accumulation and a method for improving frequency resolution, and the numerically controlled oscillator comprises a parameter configuration module, a carry processing module and a main phase accumulator. The parameter configuration module is used for configuring an integer part and a fractional part of a frequency control word based on a target output frequency, and the fractional part comprises a numerator modulus and a denominator modulus. The carry processing module is used for accumulating the fractional part of the frequency control word. On the basis of expanding an arithmetic logic bit width, a parallel pre-judgment architecture is adopted to generate a carry signal to the main phase accumulator according to the numerator modulus and the denominator modulus. The main phase accumulator is used for accumulating the integer part of the frequency control word and simultaneously updating a phase value according to the carry signal, so that a high-resolution frequency output is realized. The application decomposes the frequency control word into the integer part and the fractional part through the double modulus accumulation architecture, dynamically corrects the integer phase by using an accumulation carry mechanism of the fractional part, and realizes a frequency resolution much higher than that of a traditional structure without significantly increasing the bit width of the main phase accumulator.

This invention discloses a floating-point-fractional hybrid anchoring method and computational system for suppressing iteration errors, belonging to the field of high-precision numerical computation technology. It solves the technical problems of pseudo-chaos caused by the accumulation of iteration errors in pure floating-point calculations, the computational power explosion in pure high-precision fractional calculations, and the inability to simultaneously achieve both computational power and precision. This invention completes high-speed iterative computations of nonlinear systems using a general floating-point format. After each floating-point calculation, an optimal rational number approximation algorithm is used to convert the calculation result into a simplified rational number with a denominator not exceeding a preset threshold, eliminating the original errors introduced by floating-point truncation and rounding. The purified rational number is then converted back to floating-point format to participate in the next iteration, relying on a bounded rational number anchoring mechanism to progressively block the error amplification chain. The denominator threshold is set to 10¹²~10¹ based on the effective number of bits of the floating-point number. 5 This invention can adaptively adjust to various scenarios such as embedded terminals, supercomputing, and industrial control, and optimizes the continued fraction algorithm to achieve the globally optimal rational approximation under a given upper limit of the denominator. It requires no dedicated large number hardware and combines the advantages of high-speed, low-load floating-point operations with zero approximation error in rational numbers. It can be stably used in nonlinear computing scenarios that are sensitive to initial values ​​and require long-term stable iterations, such as chaotic simulation, vehicle trajectory prediction, industrial PID closed-loop control, 5G / 6G communication channel simulation, microscale meteorological simulation, and large-scale number theory zero-point verification. It effectively eliminates numerical trajectory drift, reduces equipment computing power consumption, and minimizes the workload of manual calibration and data screening, possessing extremely high engineering and academic application value.

This application provides a method, computer device, and computer program product for unified processing of indicator definitions for real-time interaction, belonging to the field of artificial intelligence technology. The method includes: receiving and parsing a user's verbal request and generating a structured contextual state vector; based on the contextual state vector, obtaining multiple candidate denominator definitions and their basis from a definition knowledge base that match the verbal request; generating a set of constraint strategies based on the contextual state vector, the candidate denominator definitions, and their basis; based on the set of constraint strategies, performing consistency adjudication through the candidate denominator definitions to determine a unique denominator definition; generating a finalized indicator description format based on the unique denominator definition, and embedding a restriction rule for prohibiting the visual comparison of inconsistent indicators into the finalized indicator description format; rendering the finalized indicator description format and its restriction rule on a data visualization interface, and intercepting and guiding parallel display operations that violate the restriction rule in real time.

According to one aspect, a method of decoding is provided. The method may include decoding a first syntax element to determine which type of lifting transform is enabled. The method may include, in response to a linear lifting transform being enabled, decoding a second syntax element to determine whether a lifting offset applied to lifting transform values is enabled. The method may include, in response to the lifting offset applied to the lifting transform values being enabled, decoding a third syntax element to determine a lifting offset numerator value. The method may include, in response to the lifting offset applied to the lifting transform values being enabled, decoding a fourth syntax element to determine a lifting offset denominator value. The method may include, in response to the lifting offset applied to the lifting transform values being enabled, decoding a bitstream based on the lifting offset numerator value and denominator value.

In ERIT, it is necessary to set a reference model for generating a target command for an ideal response before FF control design, and if an appropriate reference model cannot be set, coupled vibration caused by a plurality of structures cannot be suppressed. Further, when the characteristics of the plant are partially or entirely unknown, it is practically impossible to provide an appropriate reference model. Therefore, an object of the present invention is to provide a design method and a design device for data-driven damping feedforward control that can eliminate the need to set a complicated reference model.SOLUTION: A feedforward control design method has a controller structure in which a plurality of feedforward controllers to be designed are provided, a denominator polynomial of each feedforward controller is common, and a numerator polynomial is a free parameter, and the free parameter is designed by solving an optimization problem for minimizing a deviation between a target command generated by one feedforward controller among the plurality of feedforward controllers and a predicted response.SELECTED DRAWING: Figure 2

A video encoding / decoding method, a bitstream transmission method, and a computer-readable recording medium for storing a bitstream are provided. The video decoding method according to this disclosure is a video decoding method performed by a video decoding device, and includes the steps of: obtaining size information from an NNPFC (neural-network post-filter characteristics) SEI (supplemental enhancement information) message; and determining the size of an output picture based on the size information, wherein the size information includes information for the numerator of the ratio between the size of the output picture and the size of the input picture and information for the denominator of the ratio.

The application discloses a direct digital synthesis method and system based on a mixed fractional ratio, and the method comprises the following steps: determining an integer frequency control word, a numerator frequency control word and a denominator frequency control word based on a target frequency, a sampling frequency and a bit width of a phase accumulator; performing a fractional phase accumulation operation based on the sampling frequency, the numerator frequency control word and the phase accumulator to generate a carry signal; performing an integer phase carry and accumulation operation in parallel with the fractional phase accumulation operation according to the sampling frequency, the integer frequency control word and the phase accumulator to obtain an integer phase value; and obtaining a waveform digital amplitude value corresponding to the integer phase value to perform signal conversion according to the waveform digital amplitude value to obtain an amplitude signal corresponding to the target frequency, so that the accuracy of a frequency synthesis signal is improved.

The present application relates to the technical field of electric power, and discloses a line fault detection method based on a frequency response transfer function, a medium and equipment, comprising the following steps: determining the frequency response of each frequency by the frequency domain component of each frequency in the historical frequency domain distortion signal and the frequency domain component of each frequency in the experimental frequency domain restoration signal, and obtaining a plurality of numerator transfer coefficients and a plurality of denominator transfer coefficients according to the frequency response of each frequency and a preset target function, so as to construct the frequency response transfer function; and restoring the amplitude and phase of the current frequency domain distortion signal according to the amplitude attenuation coefficient and phase offset of the frequency domain transfer function corresponding to the constructed frequency response transfer function. The method can effectively eliminate the nonlinear influence of the mutual inductor on the amplitude and phase of the measured signal, accurately restore the real fault information, and thus improve the detection accuracy of the hidden fault of the overhead line.

This application provides a chip-based fusion operator processing method, apparatus, and related products, specifically applied in the field of data processing technology. The scheme includes: sequentially loading matrix units from the chip's storage device onto the chip's computing device, wherein the matrix units are obtained by splitting the target matrix according to a preset matrix unit dimension; iteratively calculating and summing the normalized denominators of each matrix unit using the computing device, determining the TopK value of each matrix unit, and iteratively processing until the sum of the normalized denominators of all matrix units in the target matrix and the corresponding TopK value of the target matrix are obtained; calculating the normalized numerator of each TopK value based on the corresponding TopK value of the target matrix using the computing device; and obtaining the processing result of the fusion operator for the target matrix based on the sum of the normalized denominators of the target matrix and the normalized numerator of each TopK value using the computing device.

The application discloses a numerical control machine tool positioning precision compensation method based on a position instruction frequency division algorithm. The method can comprise: establishing a starting origin and a detection end point of numerical control machine tool feed shaft positioning precision detection; measuring the length of the detection stroke and the positioning error of the feed shaft between the starting origin and the detection end point through a laser interferometer; according to the length of the detection stroke and the positioning error, iteratively optimizing a position instruction frequency division numerator and a position instruction frequency division denominator; and according to the iteratively optimized position instruction frequency division numerator and the position instruction frequency division denominator, compensating the positioning precision of the numerical control machine tool. The positioning precision of the numerical control machine tool feed shaft is measured through the laser interferometer, the numerical control machine tool positioning precision compensation method based on the position instruction frequency division algorithm is established, and the positioning precision of the numerical control machine tool can be improved.

The invention provides a music time coding method for artificial neural network modeling. The method aims at the coding requirement of music beat time, molecules are decomposed according to a fixed denominator for multi-bit independent classification coding, and the method comprises the following steps: setting the fixed denominator as a composite number and decomposing the composite number into a prime factor combination; the molecules are mapped into vectors, the value range of each bit is determined by a cardinal number of a prime factor combination, and the vectors are converted into one-hot coding sub-vectors with redundant components removed. The technical scheme of the invention solves the problem that the traditional mean square error (MSE) ignores the internal correlation of scores and has high sparsity in the topology recognition task of an optical music recognition system (OMR), and compared with a traditional coding method adopting floating point numerical output and a mean square error loss function under the conditions of the same data set, model architecture and training hyper-parameters, the method provided by the invention has the advantages that the coding efficiency is greatly improved; according to the method, the comprehensive error index is reduced by about 21%, and the model precision and the training efficiency are improved.

The invention discloses a matrix index calculation method and device, electronic equipment and a computer program product. The method comprises the steps that a molecular polynomial and a denominator polynomial of a matrix index based on Pade approximation are obtained, and the orders of the molecular polynomial and the denominator polynomial are the same; according to the order, a variable matrix is generated in a memory of the computing device, the variable matrix in the memory is updated according to a parameter set used for calculating matrix indexes, the parameter set comprises a plurality of parameter coefficients and parameter matrixes, and the number of the parameter coefficients, the number of the variable matrixes and the number of the parameter coefficients are determined according to the order; and determining values of the numerator polynomial and the denominator polynomial according to the updated variable matrix. According to the method and the device, the technical problem of large memory occupancy caused by relatively high space complexity of calculating the matrix exponential function in the prior art is solved.

The application relates to a minimum-beat non-ripple digital controller design method with closed-loop pole adjustment, which adjusts the pole of a desired closed-loop system pole to ensure that the closed-loop system can avoid the inherent frequency of a control object, thereby avoiding system resonance; the dynamic response performance of the system is improved by reasonably designing a desired closed-loop system pulse transfer function model and a digital controller pulse transfer function, so that the system can quickly and non-oscillatingly reach a steady state; the processing of the minimum-beat non-ripple digital controller design method with closed-loop pole adjustment ensures the stability and causality of the system, and avoids instability in implementation. Therefore, the problem that the minimum-beat non-ripple digital controller design method commonly used in the automatic control field cannot avoid system resonance by adjusting the closed-loop pole of the control system to avoid the inherent frequency of the system structure is solved.

The invention provides a method and system for calculating a Cole-Cole model by using a rational fraction approximation method, a medium and a product, and relates to the field of electric digital data processing. An error expression between a Cole-Cole target model and a rational fraction approximation function before solving is multiplied by a denominator polynomial of the approximation function, and a denominator coefficient to be solved is moved to a linear expression from a denominator position, so that a linearized error function is obtained. Then, on the basis of the linearization error, discrete sampling points are selected in the full frequency band, and a target function with the purpose of minimizing the sum of errors is established. A nonlinear problem which needs to be solved through complex iteration originally is converted into an optimization problem which can be solved in a one-time and deterministic mode through a standard linear solving algorithm. The high efficiency of the solving process and the stability of the result are ensured, the effect and the accuracy of the induced polarization effect are improved, and meanwhile the cost is reduced.

A computing device (101), a method, and a computer program product for replicating a three-dimensional label mask (20) of a three-dimensional volumetric data set (190) in a network of computing devices (100), wherein the device (101) receives, from a further computing device (102) of the network, a set of segmentation input data (21) describing an edit (2-1) of the label mask (20) at the further computing device (102), the set of segmentation input data comprising current position data, size data, and a label identifier associated with a spherical segmentation object (102-1) used by the second computing device (102) to interactively edit the label mask. The replication module (101-10) replicates an edited label mask of a further computing device (102) associated with a set of segmentation input data by calculating respective ellipsoids corresponding to the spherical segmentation object (102-1) stretched inversely proportional to the shapes of the voxels in the label mask, determining voxels (vi) of the label mask having positions inside the segmentation object based on the ratio of the distance between each voxel position in all three dimensions and the center position of the ellipsoid divided by the respective semi-axis lengths of the ellipsoid, the division being performed by negating the exponents of each denominator using respective bitwise operations on a graphics processing unit of the computing device (101), and updating the determined voxels in the replicated label mask (10) according to the label identifiers of the segmentation input data (21).

The application provides a global sparse texture filtering method based on edge structure preservation, including introducing a texture inhibition function in a penalty term, and constraining the gradient of an output image, the texture inhibition function inhibits texture, noise and unnecessary detail information in the image by setting two threshold values, then using the inhibited gradient as the input of the denominator of the penalty term, so that the penalty term can sufficiently distinguish texture and structure; sparse regular L1 norm is used to constrain the penalty term, non-convex optimization is converted into a convex optimization problem by introducing a sub-gradient, and an alternating direction multiplier method is used for iterative solution, so that better edge preservation is achieved; sparse L p Norm is used to constrain the penalty term and a preconditioned conjugate gradient method is used to accelerate and improve the calculation efficiency, so that more robust and sparse image smoothing effect is achieved. The application can improve the robustness of the algorithm in distinguishing texture and structure, retain better semantic information, and achieve better edge structure preservation and smoothing performance.

The application discloses a PCB micro-defect target detection method based on an improved RT-DETR, which comprises the following steps: acquiring and amplifying a PKU-Market-PCB dataset, and dividing the dataset into a training set, a test set and a verification set; constructing a micro-defect target detection network for training; and performing target detection by using the trained model. The application constructs a light-weight high-resolution feature path, introduces a P2 shallow high-resolution feature layer in a feature pyramid, and configures a partial convolution structure in a backbone network, so as to retain micro-defect spatial edge features and reduce redundant calculation amount. For micro-defect regression, an SG-GCD metric with a fixed scale lower limit constraint introduced in a calculation denominator is constructed, an SCA-Loss loss function is designed, and dynamic weighted calculation of boundary overlap accuracy and center distance measurement is realized by using a global learnable parameter. The application reduces the model parameter amount, improves the training stability, and improves the detection accuracy.

The application provides a joint time-frequency domain equalization method under PSK and QAM modulation, which comprises the following steps: receiving an initial signal, sampling, obtaining an initial head scattered pilot, processing the initial head scattered pilot, realizing time domain cross-correlation and autocorrelation, respectively performing fast Fourier transform on a first processed signal and a second processed signal to obtain a third processed signal and a fourth processed signal, taking the third processed signal as a numerator and the fourth processed signal as a denominator to obtain a channel estimation frequency response, estimating a signal-to-noise ratio of the second processed signal to obtain a signal-to-noise ratio curve, calculating a signal-to-noise ratio estimation value according to a peak value in the signal-to-noise ratio curve and data variance calculated according to other data, combining the channel estimation frequency response to obtain a frequency domain equalization coefficient, processing second data and a tail scattered pilot in the initial signal to obtain a fifth processed signal, and combining the frequency domain equalization coefficient to obtain a time domain signal.

A fast iterative adaptive method, a direction-of-arrival estimation method, a signal processing method, an integrated circuit, an electromagnetic wave device and a terminal device can reduce the complexity calculation amount of direction-of-arrival estimation processing. The fast iteration adaptive method is used for direction of arrival estimation, and comprises the following steps: when angle signal parameters are calculated in each iteration, using a Capon power spectrum calculated in the last iteration to approximate a current denominator term, so that a processor calculates the angle signal parameters of this time by adopting the following angle signal parameter formula, x < k > (t) is a tth angle signal parameter and is a Capon power spectrum calculated during (t-1) th iteration, aH (theta < k >) is a conjugate transpose of a steering vector a (theta < k >), R is a covariance matrix, y is a received signal vector, and k represents a sampling point number of DOA.

The invention discloses a permanent magnet synchronous linear motor multiplicative disturbance compensation method based on iteration feedforward setting, and belongs to the technical field of precision motion platform control. The motion control system comprises a physical system which comprises a motion system, additive interference and position-related multiplicative nonlinearity; the control system comprises a feedback controller, a track-related feedforward controller, an additive disturbance compensation term and a multiplicative nonlinear compensation term. The method comprises the following steps: S1, parameterizing a rational feedforward controller; s2, designing a feedforward iteration setting method based on data; and S3, designing an internal loop iteration method. According to the rational feedforward controller disclosed by the invention, the algebraic loop problem is avoided, and complete parameterization can be realized, so that relatively high task flexibility is kept; meanwhile, numerator and denominator polynomial parameters are optimized, and better parameter adjustment precision is achieved; according to the internal loop iteration process, the servo error of each experiment is fully utilized to construct a more accurate data model, and the parameter convergence speed in the parameter adjustment process is effectively improved.

Techniques are disclosed relating to circuitry for floating-point division. In some embodiments, the circuitry is configured to generate a subnormal result for a division operation that divides a numerator by a denominator. The circuitry may include floating-point circuitry configured to perform a reciprocal operation to determine a normalized mantissa value for the reciprocal of a floating-point representation of the denominator. The circuitry may further include fixed-point circuitry configured to multiply a fixed-point representation of the normalized mantissa value for the reciprocal by a mantissa of the numerator to generate an initial value. Control circuitry may determine error data for the initial value and generate a final subnormal mantissa result for the division operation based on the error data and the initial value. Embodiments with multiple modes with different accuracy guarantees are disclosed.

Embodiments of the invention provide a floating-point number power function operation method and apparatus, a computer device and a storage medium. The method comprises the steps of obtaining an independent variable and a power of a target power function; the power of the target power function is decomposed according to a preset format, an integer value and a score value corresponding to the power are determined, and the score part comprises a numerator value and a denominator value; decomposing the target power function into a first power function and a second power function according to an integer value, a numerator value and a denominator value corresponding to the power; and determining the value of the target power function based on the first power function and the second power function. The method can solve the problems of poor precision, low efficiency and limited application range of a traditional power function calculation method.

An example device for coding a point cloud includes a memory configured to store the point cloud, and one or more processors communicatively coupled with the memory. The one or more processors are configured to determine a value of a numerator syntax element, the value of the numerator syntax element indicating a numerator of a scaling factor for the point cloud. The one or more processors are configured to determine a value of a denominator syntax element, the value of the denominator syntax element indicating a denominator of the scaling factor for the point cloud. The one or more processors are configured to process the point cloud based at least in part on the scaling factor for the point cloud.

The invention discloses an AGC control parameter optimization method, device and equipment based on a frequency stability domain and a storage medium, and belongs to the technical field of electric power systems.The method comprises the steps that a frequency dynamic analysis model with system disturbance as input and regional frequency deviation as output is built based on topological data and dynamic characteristic data of an asynchronous interconnection dual-region system; a transfer function in the frequency dynamic analysis model is converted into a fraction form, a denominator is a system common closed loop characteristic polynomial, and the system common closed loop characteristic polynomial comprises an undetermined AGC integral coefficient combination; determining a parameter value range of an AGC integral coefficient combination according to the dynamic characteristic data and a preset operation constraint parameter; screening a plurality of groups of alternative AGC integral coefficient combinations in a frequency stability domain in a parameter value range; and by taking the shortest AGC recovery time as an optimization target, determining an optimal AGC integral coefficient combination, and generating AGC control parameters. According to the invention, the problem of low stability of system AGC control in the prior art can be solved.