7 results about "Parameter dependent" patented technology

A table workflow checking method, device, medium, equipment and program product, relating to the technical field of computer, can realize small range checking of the workflow in the database table, and improve the checking efficiency of the workflow. The table workflow checking method comprises: in response to a node configuration operation of the workflow, determining a configured first node, the workflow being an automated process created in the table, and the node of the workflow being used for processing data of the table; determining a second node having a dependency relationship with an output parameter of the first node according to node dependency information of the workflow, wherein the node dependency information represents the dependency relationship between the input parameters and the output parameters of different nodes in the workflow; and checking the second node according to the node dependency information to obtain a first checking result, wherein the first checking result represents whether the output parameter dependent on the input parameter of the second node is consistent with the node dependency information.

A method of monitoring the torsion of a rotating shaft on an aircraft turbine engine, based on measurements from at least three sensors distributed along the rotating shaft, the at least three sensors dividing the shaft into at least two shaft sections, the method comprising: - for each sensor, a step of measuring a parameter dependent on the rotation of the shaft, - for each pair of achievable sensors, a step of calculating a parameter related to the torsion of the shaft, - a step of comparing the different calculated parameters related to the torsion of the shaft with a reference, - at the end of the comparison step, a step of detecting a damage on a shaft section, and - a step of indicating the positioning of the damage on the shaft from the shaft section for which a damage has been detected.

The invention discloses an efficient random low-rank approximation method and system for a parameter dependent matrix. The efficient random low-rank approximation method comprises a parameter dependent matrix low-rank approximation method based on random SVD and a parameter dependent matrix random low-rank approximation method based on generalized Nystrm. The method comprises the following steps: acquiring a parameter dependence matrix and a simulated linear decomposition structure thereof; generating a fixed random dimension reduction matrix and carrying out offline preprocessing; a matrix sketch is calculated through row partitioning and House holder QR decomposition; pre-calculating an intermediate variable by adopting an index optimization technology; in the online stage, a low-rank approximation factor is rapidly calculated through parameter correlation linear combination; and error analysis and failure probability control based on the Frobenius norm are provided. According to the method, the parameter dependency matrix low-rank approximation problem in time sequence analysis, dynamic system simulation and Gaussian process regression can be solved, and the method has the advantages of being high in calculation efficiency, small in storage overhead, good in numerical stability and controllable in error.

The invention relates to a method for operating a vehicle system (2), which provides an autonomous driving function for fully automatically guiding a motor vehicle (1), which autonomous driving function can be used within a system boundary described by at least one system boundary parameter to be obeyed for an environmental parameter describing an environmental condition, in order to determine and execute an autonomous vehicle guidance measure, in particular a driving maneuver, of an autonomous driving function within a base guidance range described by at least one base guidance boundary parameter, in the event that at least one relevant current environmental parameter violates at least one system boundary parameter, the autonomous vehicle guidance measure is determined and executed. At least one adjustment condition that evaluates the current environmental parameter is checked, and if the adjustment condition is satisfied, the autonomous vehicle guidance function is provided with a reduced guidance range described by a guidance boundary parameter that depends on the satisfied adjustment condition and / or the current environmental parameter.

This invention relates to the field of product reliability analysis technology, specifically to a reliability assessment method for a non-fixed shape parameter dependent competing failure model. The method includes the following steps: constructing a dependent competing failure model, designing an adaptive stepwise type II hybrid truncated constant-load life test, estimating parameter points based on test data, establishing an acceleration equation, calculating product reliability under normal stress, and performing interval estimation. This invention constructs a MOBG distribution description that assumes fixed shape parameters and does not consider the dependencies between unknown failure mechanisms and causes. It designs an adaptive stepwise type II hybrid truncated constant-load life test to obtain data, solves for parameters based on maximum likelihood estimation and Bayesian estimation, and combines the acceleration equation to obtain parameter estimates under normal stress. This leads to the calculation of product reliability and interval estimation, improving the accuracy and applicability of reliability assessment. It is suitable for reliability analysis of various products with multiple failure mechanisms and potentially unknown causes.

The application discloses a reliability evaluation method for a nonlinear random effect parameter related degradation process, obtains sample data; according to the sample data, calculates parameter estimation values of sample distribution; establishes distribution models of various parameters; utilizes the parameter estimation values of the sample distribution and maximum likelihood estimation to calculate various parameters in the distribution models; utilizes a total probability formula to calculate a degradation amount distribution density; after linear change of the degradation amount, T distribution is obtained. According to the T distribution, a confidence interval of the degradation amount is calculated; a failure threshold of degradation is set, and reliability of a product is calculated. The application considers the correlation between parameters in distribution, obtains simple form degradation amount distribution, and reduces reliability evaluation calculation difficulty.

The invention concerns a method for monitoring an airplane propulsion system, the propulsion system comprising at least one piston engine and a propeller. The method provides for acquiring an audio signal from inside an airplane cockpit, selecting the frequency with maximum amplitude of the audio signal, calculating the engine revolutions r as (I) Where -r indicates the engine revolutions per minute, p indicates the value of the maximum frequency and vindicates the number of detonations in the engine necessary to perform an engine revolution, k is a parameter dependent on the ratio between engine revolutions and propeller revolutions and is equal to 1 in the case of a propeller keyed onto a shaft of the engine.