19 results about "Matrix expression" patented technology

The invention discloses a computing power resource scheduling management system based on multi-source heterogeneity, and relates to the technical field of computing power management, and the system builds a multi-source heterogeneity data collection point in a multi-unmanned aerial vehicle cooperative monitoring system through a task space-time migration matrix construction module, and collects space-time data in real time. A standardized space-time migration parameter set is extracted through a transmission processing unit, and a task space-time migration matrix Tso is constructed. The task space-time offset matrix Tso realizes the unified matrix expression of multi-source space-time data, so that the time difference, spatial drift and signal credibility of asynchronous sampling nodes are quantified in a computable and differentiable manner. Compared with an existing system depending on synchronous sampling or simple time calibration, the method has the advantages that the data calibration precision in an asynchronous sampling environment is remarkably improved through matrix offset expression, error accumulation caused by cross-node delay inequality is reduced, and accurate data alignment and feature fusion can be realized under the condition that nodes are not completely synchronized.

An energy efficiency optimization control method for a single-stage isolation matrix converter is proposed. This method calculates the input current vector magnitude of a three-phase single-stage isolation matrix AC-DC converter, derives the duty cycle expression, minimizes the current stress in the three-phase single-stage isolation matrix AC-DC converter, achieves soft switching, derives the full-bridge phase shift angle expression based on the per-unit value of the input current, designs a single-loop voltage control circuit, does not sample the input current, achieves unity power factor, and keeps the input current sinusoidal.

The invention discloses an unequal-length iterative learning control optimization method for a robot impedance control system, and relates to the field of robot control, and the method comprises the steps: building a high-dimensional linear state space model capable of describing nonlinear dynamic characteristics based on a Koopman operator theory; based on the model, an approximate linear repetitive process model of the robot impedance control system is further constructed, and an input and output matrix expression form of a time sequence is obtained through a lifting technology. For the unequal-length problem, a prediction compensation method is used, missing information caused by the unequal-length problem is predicted, and the track length is adjusted to the expected length. Under a norm optimization framework, the performance of future batches is considered, a predictive iterative learning control algorithm is designed, and finally the predictive iterative learning control algorithm is applied to an actual robot impedance control system. Control input obtained through the method can better adapt to an original nonlinear system, and high-precision tracking control over an expected trajectory is basically achieved.

The invention belongs to the technical field of material science foundation, and discloses a single twinborn system dominated twinborn transmission probability prediction method. According to the method, aiming at the condition that a single twin system is started preferentially under specific texture and force field conditions, the uniqueness of the twin system is limited and activated, and a three-dimensional matrix expression system of specific twin system spatial orientation is constructed. And based on a judgment rule that twin crystal faces and twin directions of the two crystal grains are parallel, calculating the minimum orientation difference capable of realizing parallel twin systems among the crystal grains. According to the method, the twinborn orientation difference is provided as a key physical quantity for quantifying the twinborn transmission capability, and the regulation and control mechanism of single twinborn system activation on local stress redistribution is disclosed by eliminating the interference of a non-activated twinborn system. The method is applicable to a twin-dominated deformation system at low temperature or high strain rate, and provides a micromechanical basis for optimizing strain coordination at the grain boundary.

This application provides a curve fitting method, apparatus, electronic device, and storage medium. The method, applied in the field of path planning technology, includes: determining each path point to be fitted and the velocity corresponding to a target path point; determining a first node vector corresponding to a non-uniform B-spline curve to be fitted based on each path point; determining control points of the non-uniform B-spline curve based on the path points to be fitted, the aforementioned velocities, and the matrix expression corresponding to the non-uniform B-spline curve; the matrix expression describes the correspondence between the control points of the non-uniform B-spline curve, the path points to be fitted, and the velocities corresponding to the target path points; determining each fitting point on the non-uniform B-spline curve based on the control points and the first node vector; and determining the fitted non-uniform B-spline curve based on each fitting point. This method can improve the path fitting effect and reduce fitting error.

1. Name of the product in this design: Matrix Display. 2. Purpose of this design: This design is used to display liquid level. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a kind of swing integral gyro accelerometer outer ring position identification method, this method includes: obtaining the expression of apparent acceleration;The expression of apparent acceleration is handled to obtain the matrix expression of apparent acceleration;Obtain multiple outer ring precession angular velocity, according to multiple outer ring precession angular velocity to obtain continuous record data;Obtain multiple outer ring precession angle, according to multiple outer ring precession angle to obtain continuous record data;According to continuous record data and continuous record data, parameter C 11 、C 21 、C 31 In the matrix expression of apparent acceleration, according to the apparent acceleration that swing integral gyro accelerometer sensitive axis senses, parameter C 11 、C 21 Obtain outer ring starting angular position;According to outer ring starting angular position and outer ring precession angle, swing integral gyro accelerometer real-time outer ring absolute angular position is obtained.The application solves the problem that swing integral gyro accelerometer outer ring position is unknown and cannot be controlled, with the characteristics of fast, reliable, practical.

The invention provides a quantum error mitigation method based on unitary gate design combined with a Fouli channel Z mixed expression, and the method comprises the steps: carrying out the unitary gate design of a quantum gate in a quantum circuit, and then combining with the Fouli channel Z mixed expression to alleviate the quantum gate and a measurement error. According to the method, the unitary gate design is combined with the Z mixed expression of the Fouli channel, the quantum gate noise and the measurement noise can be relieved at the same time, any quantum gate noise can be equivalently converted into a depolarization channel through the unitary gate design, the limitation of a traditional method on the noise type is avoided, the application range is wider, and the method is easy to implement. The method can be effectively operated under a more generalized noise model; compared with zero-noise extrapolation and other methods, the method does not depend on a large number of noise amplification experiments and complex fitting, and parameter estimation can be completed only through a small amount of auxiliary measurement; the invention provides a more generalized noise channel mitigation scheme for the quantum error mitigation field.

The application relates to the technical field of intelligent robot skin, in particular to a matrix type film pressure sensor array structure for robot skin, which comprises a flexible silica gel base body, a 32*32 film pressure sensor unit array, a partitioned analog-digital conversion module, an FPGA and an embedded MCU, and three types of local feedback execution units. The structure enhances signal sensitivity through thickness gradient design, realizes tactile recognition and multi-modal feedback closed loop in combination with a local neural network, supports magnetic attraction splicing and modular expansion. The application can realize high-density tactile perception, low-delay response and vision-independent human-machine safety interaction.

The application discloses a conjunctive normal form based semi-tensor product SAT solving method, which comprises the following steps: analyzing conjunctive normal form clauses; according to the analyzed conjunctive normal form clauses, combining each clause C x into a corresponding logical matrix representation M x , and obtaining M x ; combining the obtained M x into a group of matrix expressions through logical relationship; calculating the logical matrix representation according to the semi-tensor product SAT solving; and according to the satisfiable assignment of each C x , taking the intersection of each group of satisfiable assignments to obtain a group of satisfiable Boolean assignments satisfying all independent clauses C. The conjunctive normal form based semi-tensor product SAT solving method and device can reduce the calculation time, improve the calculation efficiency and improve the compactness of the satisfiable solution.

The invention discloses a nonlinear rotor system dynamic response and sensitivity calculation method and device, equipment and a medium, and the method comprises the steps: S1, carrying out the dynamic modeling of a nonlinear rotor system according to the structural characteristics of the nonlinear rotor system, and building a motion equation of the nonlinear rotor system; s2, establishing a hypercomplex form of the motion equation of the nonlinear rotor system to obtain a hypercomplex motion equation of the nonlinear rotor system, and performing dimension expansion conversion on the motion equation of the nonlinear rotor system of a complex matrix into an equivalent real number matrix by using a complex matrix expression; and S3, solving the established hypercomplex motion equation of the nonlinear rotor system, extracting the real part value and the imaginary part value of a calculation result, and obtaining the response of the system and the corresponding sensitivity of each order. According to the method, the jacobian matrix is automatically updated and solved in the iteration process, the accuracy of the calculation result is ensured, the response sensitivity and the dynamic response sensitivity of the nonlinear rotor system can be calculated at the same time, and the calculation efficiency is high.

The invention discloses a free surface multiple noise suppression method, device and equipment. The method comprises the following steps: constructing a matrix expression of original seismic data based on the original seismic data and performing multiple suppression on the original seismic data to obtain a residual target function of primary waves; determining an initial iteration gradient based on the residual objective function, and determining an update direction in a suppressed multiple inversion iteration process based on the initial iteration gradient and a second-order partial derivative of the residual objective function; based on the initial iteration gradient and the updating direction in the inversion iteration process, determining an iteration optimal step length; carrying out inversion according to the iteration optimal step length, and judging whether an expected effect is achieved or not; if yes, inverse Fourier transform is carried out to obtain suppressed primary waves; and if not, updating the iteration gradient and the updating direction to continue iteration inversion. An inversion algorithm based on second-order optimization has better convergence performance and operation precision; seismic wavelets do not need to be provided, manual intervention is little, and the calculation efficiency is high.

The invention discloses a modeling method and system for a single-stage isolation matrix AC-DC converter, and belongs to the technical field of power electronics, and the method comprises the steps: building an original time domain state equation of the single-stage isolation matrix AC-DC converter according to a preselected state variable and a switching function; extracting each preselected state variable and a main moving average component of each switching function; the main moving average component is the moving average component with the maximum amplitude; taking each moving average component as a corresponding state variable or approximation of a corresponding switching function, and substituting the moving average components into the original time domain state equation to obtain a time domain state space model of the single-stage isolation matrix AC-DC converter; and correcting the real part and the imaginary part of the main moving average component of each state variable in the time domain state space model, so that the output direct current voltage calculated based on the time domain state space model is equal to the actual direct current output voltage after correction. According to the invention, accurate mathematical modeling of the single-stage isolation matrix AC-DC converter can be realized.

The invention discloses a resolution improvement limit derivation method. The method comprises the following steps: converting an echo signal into an echo signal matrix expression under a geometric diffraction model; echo vector probability distribution is obtained under the condition that preset noise is Gaussian complex noise, and an echo likelihood function is obtained according to the echo vector probability distribution; calculating a Fisher information matrix of the scattering center parameter; obtaining CRLB of the scattering center parameters according to the Fisher information matrix of the scattering center parameters; obtaining the minimum distance between the two scattering centers according to the pole phase difference of the two scattering centers under the pole model; obtaining the phase difference of two poles in the first sub-band and the phase difference of two poles in the double sub-bands according to the minimum distance between the two scattering centers; and obtaining a resolution improvement limit according to the phase difference minimum value of the two poles in the first sub-band and the phase difference minimum value of the two poles in the double sub-bands. The invention solves the problem that the existing resolution improvement limit is only suitable for a point scattering center and has a narrow application range.

A compilation method is proposed comprising the steps of: determining, for each matrix expression (E) of a source code, N ordered matrix operations (On); generating, from the matrix operations, an object code; and delivering the object code to an execution device comprising a storage unit (240) capable of holding at least one temporary memory space (241), each comprising temporary subspaces (241-n). The instructions of the object code include, for each thread of execution of the object code: the pre-allocation of a temporary space; for each expression in the thread, the execution of N groups of instructions, each associated with one of the matrix operations and comprising: the allocation of a matrix (Tn) corresponding to the result of the evaluation of the operation, in a temporary subspace; the evaluation of the operation and the storage of the matrix, the Nth matrix (TN) being the result of the execution of the expression in the thread.Figure for the abridged version: [Fig.4].

1. The name of the design product: precision component box (matrix type). 2. The use of the design product: used for the storage container of precision electronic components. 3. The design points of the design product: shape, pattern. 4. The picture or photo that best indicates the design points: perspective view 1.

This invention provides a matrix-based data hierarchical intelligent management system, belonging to the field of intelligent social media marketing technology. The system includes a multi-source data acquisition module, a data matrix construction module, a hierarchical processing and scheduling module, an intelligent profile generation module, and a multi-version content generation module. The multi-source data acquisition module acquires historical user interaction data from multiple platforms, preprocesses it, and outputs standardized raw data. The data matrix construction module classifies the standardized data, scores the value of data units, matches levels, and constructs a data matrix based on attributes. The hierarchical processing and scheduling module selects a basic strategy based on the matrix, adjusts it according to value levels, and outputs processed data. The intelligent profile generation module generates user profiles based on the processed data. The multi-version content generation module filters high-value data and combines it with profiles to generate multi-version adapted content. This system can improve data management efficiency, profile accuracy, and content adaptability.

The invention provides an aerodynamic modeling method suitable for wide-speed-range small-maneuvering motion of an aircraft, and relates to the technical field of aircraft modeling. The method comprises the following steps: firstly, carrying out finite element modeling on a rigid symmetric aircraft, and generating aircraft speed and acceleration sample data under set time length and time step length through a Latin hypercube sampling LHS method; establishing a conversion matrix for converting the fixed coordinate system into an airframe coordinate system, and obtaining a matrix expression of the speed of the aircraft relative to the fixed coordinate system in the airframe coordinate system; performing flow field simulation on the aircraft, acquiring aerodynamic force and torque data of the aircraft, and establishing an aircraft aerodynamic model; substituting the speed sample data, the acceleration sample data and the six-degree-of-freedom coupling item of the aircraft into the aircraft aerodynamic model to finally obtain six groups of equations; and finally, performing coefficient identification on each group of equations to obtain an aerodynamic model preliminarily containing all parameters, and then performing parameter elimination to obtain an aerodynamic model of aircraft force and torque.

The application discloses a fruit and vegetable video foreground detection method based on adaptive updating parameters, and the method is characterized in that: through an iterative process, parameters of different hypergeometric distributions for different frames are given, and a normal equation set and a matrix form are given by making the first derivative of the weight of all hypergeometric distributions in a frame equal to zero through a square error weighted sum function, so as to obtain a matrix expression of the weight of different hypergeometric distributions in the frame, wherein the parameters of the hypergeometric distribution can be adaptively updated after a certain frame in an interval period, and then the size of the weight corresponding to different hypergeometric distributions is selected in turn for a certain pixel point in the frame in the fruit and vegetable video sequence, so that fruit and vegetable video foreground detection is completed.