11 results about "Total error" patented technology

Techniques are described for quickly finding a compression mode for BC7 encoding by modelling three sources of error in compression, namely, projection error, endpoint quantization error, and interpolation index quantization error. The mode with the lowest total error is selected for a block to be compressed.

Devices, systems, and methods for improving performance of an iterative decoder in a non-volatile memory are described. An example method includes obtaining a hard error percentage, a spare byte percentage, and a total error count associated with a first page in the memory device, determining that the total error count is greater than a threshold value that is determined based on the hard error percentage and the spare byte percentage, and performing, based on the determining, a data relocation operation that relocates at least some data from the first page to a second page different from the first page.

The application provides a camera and IMU joint calibration method, which comprises the following steps: step 1, initializing a target camera and a target IMU to obtain initialization parameters; step 2, constructing a first error L1 and performing one-time iterative optimization by using an LM algorithm; step 3, updating the initialization parameters and the bias of the target IMU acceleration, and determining whether the total error determined by the first error is less than a set threshold value; if yes, entering step 7, otherwise, entering the next step; step 4, obtaining gyro noise and acceleration noise according to the bias of the gyroscope and the acceleration of the target IMU at each time after updating; step 5, constructing a second error according to the acceleration noise and the first error L1; step 6, performing iterative optimization on the second total error L2 by using the LM algorithm, and determining whether the error is less than a preset threshold value; if yes, entering the next step, otherwise, entering step 3; and step 7, obtaining a calibration quantity. The application realizes joint calibration of the camera and the IMU, and has high efficiency and high accuracy.

The invention provides a machine tool expected running track error compensation method and device and a medium, and relates to the technical field of machine tool expected running track error compensation. The method comprises the steps that the complexity of an original running track is determined; if the complexity of the original moving trajectory is higher than a first preset complexity threshold value, performing total error prediction on an expected moving trajectory corresponding to the original moving trajectory subsequently; if the complexity is between a second preset complexity threshold value and a first preset complexity threshold value, dividing the original running track into a plurality of original running sub-tracks; performing error prediction on a track segment corresponding to each target original operation sub-track in the expected operation track; if the complexity of the original moving trajectory is smaller than or equal to a second preset complexity threshold value, error prediction and compensation are not carried out on the expected moving trajectory; on the premise of ensuring the compensation precision of the key part, the error prediction calculation amount of the non-key sub-track can be greatly reduced, and the computing power consumption of a machine tool is reduced.

Techniques are described for quickly finding a compression mode for BC7 encoding by modelling three sources of error in compression, namely, projection error, endpoint quantization error, and interpolation index quantization error. The mode with the lowest total error is selected for a block to be compressed.

The invention discloses a precise error quantification and traceability analysis method and system, and relates to the technical field of precise measurement and error analysis, and the method comprises the following steps: carrying out the layering preprocessing of original data, so as to remove abnormal values, and constructing a comprehensive multi-dimensional error quantification model; based on the multi-dimensional error quantification model, positioning a key error source with the highest contribution to a total error in a mode of combining probabilistic simulation and sensitivity analysis; and analyzing the coupling relationship between different error sources and the influence of the coupling relationship on the total error. According to the accurate error quantification and traceability analysis method provided by the invention, a layered preprocessing strategy is adopted, abnormal values in original data are effectively eliminated, a solid foundation is laid for follow-up analysis, a built multi-dimensional error quantification model comprehensively covers random errors, system errors and truncation errors, and the accuracy of the analysis is improved. The integrity and accuracy of an error quantification result are ensured, and a clear direction is provided for error control.

The invention discloses an error calibration compensation method and system for a three-coordinate measuring instrument, and relates to the technical field of precision measurement. Comprising the following steps: S1, fusing a geometric error compensation sub-model, a thermal deformation error sub-model and a dynamic load error sub-model to determine a total error compensation amount; s2, correcting the original target instruction according to the total error compensation amount, obtaining the actual position coordinates of each axis, and obtaining the final corrected position coordinates through a feedback compensation algorithm; and S3, determining a confidence interval corresponding to each final corrected position coordinate through the digital twin model of the three-coordinate measuring instrument and the uncertainty variable, and determining a corresponding monitoring result through a comparison result between an interval width corresponding to the confidence interval and an interval threshold range. According to the invention, systematic compensation of various error sources of the three-coordinate measuring instrument under different working conditions is realized, a motion instruction can be corrected in advance, and errors are reduced from the source.

The invention discloses a laboratory data fault-tolerant control method considering total errors, and belongs to the field of medical data statistics, and the method comprises the steps: building a fault-tolerant mechanism which is used for defining a fault-tolerant object and a fault type; inputting the fault-tolerant mechanism and related original data of the fault-tolerant mechanism into a first prediction model to establish a data set, and dividing the data set into a training data set and a test data set in proportion; calculating a total error of the data samples in each training data set, wherein the total error comprises a proportional error, a constant error and an index error; inputting the proportional error, the constant error and the index error into a data set of the first prediction model to obtain a second prediction model; the fault-tolerant object or fault type is redefined when the predicted value error of both the first prediction model and the second prediction model is above a threshold. According to the method, the reliability of the algorithm can be ensured, a fault-tolerant mechanism can be adaptively adjusted, and the fault-tolerant capability is further expanded.

A low-complexity AGENT error precision control method solves the problems of difficult control, complex compensation, and poor real-time performance of AGENT full-process error + core Jiang's initial error decomposition formula Δ=Δ₁+Δ₂+Δ₃, combined with phase compensation and closed-loop verification, total error ≤1.1%, calculation period ≤1s + for industrial / creative / public service AGENT error control.

This invention discloses a tolerance allocation and structural optimization design method for an optical tracking and measurement system based on Abbe error. It establishes a system error propagation model for the optical tracking and measurement system based on Lie group and Lie algebra theory; analytically expresses the macroscopic and microscopic Abbe errors caused by measurement distance and scanning depth; and establishes a system tolerance optimization allocation model by combining sensitivity analysis of each error source with the goal of minimizing the total system cost. For the positioning target, a design criterion for the positioning target radius based on Abbe error constraints is derived. Compared with existing technologies, this invention represents the total error as a vector synthesis of three error vectors in space. The analytical model can not only predict the average level of error but also accurately describe the statistical boundary of error fluctuations, achieving a balance between tolerance allocation and accuracy-cost. It automatically adjusts the accuracy of each component based on the error method effect, achieving minimum cost tolerance allocation, and derives the formula for the minimum target radius under the target accuracy.

A method, apparatus and product comprising: obtaining alternative quantum circuits implementing a quantum program, each having a respective design error; identifying, for each quantum circuit, respective quantum resources that are used by the quantum circuit and are associated with respective hardware errors of a quantum computer; determining a total hardware error bound for the quantum circuit; determining a total error bound for the quantum circuit; applying a search algorithm over a plurality of total error bounds of the plurality of alternative quantum circuits, to identify an optimal total error bound that is associated with an optimal quantum circuit; and providing the optimal quantum circuit for execution on the quantum computer.