54 results about "Direct computation" patented technology

The invention relates to the technical field of wind power generation, and discloses a numerical simulation inflow turbulence scale conversion method and device.The method comprises the steps that a turbulence inflow system is decomposed into an analysis part and a simulation part through wind spectrum time scale analysis and target time scale division, direct calculation of full-scale turbulence in a traditional method is avoided, and the calculation efficiency is improved; and the calculation cost is obviously reduced. The analysis part adopts instantaneous wind speed time history direct representation, the simulation part is solved through a turbulent flow transport equation, and calculation precision and efficiency are both considered. Smooth connection of an analysis scale and a simulation scale is realized by adopting a low-pass filtering technology, manual truncation errors are reduced, and the simulation precision of turbulence pulsation characteristics is improved.

The invention discloses a rapid forward modeling method for a gravity field of a rectangular coordinate system based on an isoparametric transformation global discrete grid, and belongs to the technical field of geophysical exploration. According to the method, a measuring network composed of dggrid grids is manufactured to cover the whole measuring area range by selecting the measuring network forming form and the side length, the exploration depth is selected as D, the dggrid grids extend to the ground by an n < z + 1 > layer to form dggrid units of an n < z > layer, and the corresponding thickness of the dggrid units is D / n < z >. And calculating the abnormal response of all the dggrid units at each observation point by utilizing isoparametric transformation based on a dggrid unit interpolation type function, an integral point and an integral weight coefficient obtained by a hexagonal prism integral formula. Compared with a square grid, the dggrid grid has excellent angular resolution, the discrete distance measurement of the dggrid grid is better close to the Cartesian distance, and the dggrid grid also has the advantage of displaying uniform and clear adjacency. Compared with conventional direct calculation, the rectangular coordinate system gravitational field forward modeling based on the isoparametric transformation global discrete grid has extremely high acceleration potential.

An example apparatus includes interface circuitry, machine-readable instructions, and at least one processor circuit to be programmed by the machine-readable instructions to initialize a full hot expert buffer to store entire weights of an expert used with a first frequency, initialize a partial hot expert buffer to store partial weights of an expert used with a second frequency, wherein the first frequency is higher than the second frequency, identify a selected expert associated with a Mixture of Experts (MoE) layer of a Large Language Model (LLM), and perform a direct computation or a partially direct computation, the direct computation performed when the selected expert is stored in the full hot expert buffer, the partially direct computation performed when the selected expert is stored in the partial hot expert buffer.

This application provides a method for uncertainty analysis in mechanical product assembly performance simulation. This method considers the impact of various uncertainty factors at different stages of the simulation process on assembly performance, classifying these factors into two categories for quantitative analysis. The first category includes the measurement, modeling, and simulation analysis stages in the early stages of simulation; the uncertainty u or error of these factors can be directly calculated. The second category consists of assembly performance uncertainties caused by external loads, boundary conditions, and nonlinear processes primarily based on geometric error distribution. For this category, this method uses simulation analysis results from a physical digital twin model, combined with the construction of an optimal SVR surrogate model and Sobol global sensitivity analysis, to quantitatively analyze the sensitivity of assembly performance to process parameters. In summary, this method provides guidance for the product assembly process.

The invention provides a robust design method and system for a fractional order PI controller of an inertia and delay fractional order object. The method comprises the following steps: describing a controlled object by adopting an inertia and delay fractional order transfer function; the feedback controller adopts a fractional order PI controller; a crossing frequency and a phase margin are given, and a proportional gain, an integral gain and a controller order of the fractional order PI controller are solely solved based on three constraint equations of the given crossing frequency, the given phase margin and zero slope of an open-loop phase of a closed-loop system at the crossing frequency; if a null set is solved, the values of the crossing frequency and the phase margin need to be given again, and solving is carried out; and traversing the range of the traversing frequency and the phase margin to obtain a feasible region of the fractional order PI controller. According to the method, the parameters and the feasible region of the fractional order PI controller can be directly calculated, it is guaranteed that the fractional order PI controller has high robustness, and the method has practical application value.

The application provides a Petri net supervisory control method and a controller applied to a complex manufacturing system, and the method comprises the following steps: obtaining system information of the complex manufacturing system, and constructing a Petri net model of the complex manufacturing system according to the system information; constructing a reachable graph of the Petri net model according to the Petri net model; taking the current state and resources of each device as input, and predicting transition enabling values of each device in all reachable states through a trained neural network model; and performing supervisory control on the complex manufacturing system according to the transition enabling values of each device in all reachable states. For the complex manufacturing system, the application can avoid the state explosion problem caused by the calculation of the reachable graph of the complex manufacturing system, greatly reduce the time complexity and calculation complexity caused by the calculation of the reachable graph, and directly realize the deadlock control of the complex Petri net and has high behavior permissibility.

The invention discloses a method for analyzing time-frequency characteristics of collision vibration by using a segmented B-spline wavelet collocation method, which comprises the following steps of: (1) establishing a dynamic equation for wavelet discretization, discretizing a dynamic control equation of a collision-vibrator system by using a 4-order B-spline wavelet basis function, and establishing a nonlinear algebraic equation set about a wavelet coefficient; (2) carrying out segmented iterative solution on the time domain, dividing the whole time domain into a plurality of sub-time periods which are connected in sequence, and carrying out iterative solution on the nonlinear algebraic equation set in each sub-time period to obtain a global wavelet coefficient; and (3) analyzing the time-frequency characteristics, and directly calculating energy distribution based on the wavelet coefficient to realize time-frequency joint characterization. The invention aims to provide a method which can fuse solution of system response and extraction of time-frequency characteristics in a unified mathematical framework, and realizes high-precision time-frequency joint characterization by directly solving wavelet coefficients, thereby overcoming inherent defects of an existing two-step method.

The invention discloses a near-field dynamics matrix-free finite element method based on a partial assembly strategy, and the method comprises the steps: decomposing a finite element stiffness matrix into a continuous product of a plurality of operators based on near-field dynamics operator decomposition; the element stiffness matrix is implicitly expressed as a function of a plurality of parameters, real-time calculation and reduction are carried out when needed, and partial assembly of the element stiffness matrix is achieved; and performing iterative solution on the partially assembled element stiffness matrix, directly calculating the element stiffness matrix and the element vector in the iterative solution process, and accumulating the calculation result back to the global degree of freedom. According to the method, a matrix-free method is used for replacing a traditional strategy based on an assembled matrix, and finite element numerical simulation of the near-field dynamic model is achieved.

The embodiment of the invention provides a training method for a machine learning model, and the method comprises the steps: constructing the machine learning model which comprises an input layer, a hidden layer, and an output layer; the hidden layer comprises at least one mixed feature extraction module; the mixed feature extraction module comprises a first transmission path for non-parametric feature extraction; the first transmission path directly calculates a non-parameterized feature based on the first input feature, and transmits the non-parameterized feature backwards as a first output feature; constructing an index mapping relationship between the first output feature and the first input feature; obtaining training set data to perform multiple iterations on the machine learning model to complete training of the machine learning model; and in the back propagation process of each iteration, the first transmission path maps the gradient parameter of the first output feature to the first input feature based on the index mapping relationship, and the gradient parameter is used as the gradient parameter of the first input feature, so that back propagation of the non-parameterized feature is realized. Through combination of mathematical calculation and trainable parameters of deep learning, the flexibility of a network architecture is promoted, the model calculation efficiency and the feature extraction precision are improved, and the training stability of the model is enhanced.

The invention discloses a five-axis linkage machine tool RTCP parameter measuring method and device, and provides a universal geometric mathematical model, a rotating shaft is deflected by the same angle in the forward direction and the reverse direction, the relative height of a workpiece tray surface is changed, an execution point falls on the workpiece tray surface, and the RTCP parameter is measured. The method comprises the following steps of: calculating the height change of an execution point relative to a reference plane in the process, and directly calculating the distance r of the tail end of a laser / cutter deviating from a rotating center in a five-axis machine tool by utilizing a formula, and the core advantage of the model is that parameters which are difficult to directly measure are solved through parameters which can be directly measured by utilizing mathematical model analysis; according to the method, the height error introduced by manual judgment is counteracted in a formula skillfully through a symmetric measurement design, so that the authenticity and reliability of a measurement result are greatly improved, micron-level-precision RTCP parameter calibration is realized, and the five-axis machining precision is remarkably improved; the same set of core mathematical model and process is suitable for two different types of five-axis machine tools, namely a cutter and a laser, and the universality is high.

The present application relates to the field of scientific computing and GPU technology, and particularly relates to a GPU scan path optimization method.The method comprises: constructing a three-dimensional Stencil calculation GPU framework based on an optimal scan traversal path; based on the three-dimensional Stencil calculation GPU framework, constructing a scan traversal path mathematical model, abstracting the scan traversal path into an integer programming problem, taking the total memory access amount as an optimization target, and optimizing to obtain an optimal two-dimensional window scan traversal path.Compared with the traditional direct calculation, the method of the present application can significantly reduce the data transfer in the global memory, improve the utilization rate of the accessed data, i.e., improve the data reuse rate, reduce the invalid waiting caused by the data blocking and high memory delay of the calculation unit, and thus improve the calculation efficiency.

The invention discloses an off-axis diffraction calculation method based on the Rayleigh-Sommerpheny theory, the method integrates convolution kernel translation and adaptive zero filling technologies, electromagnetic field off-axis diffraction calculation based on the Rayleigh-Sommerpheny theory is realized, and the method specifically comprises the following steps: step 1, obtaining input parameters and defining; step 2, executing self-adaptive zero filling; 3, calculating the translation amount of the convolution kernel; step 4, generating an off-axis diffraction convolution kernel; and 5, performing diffraction calculation and result extraction. According to the method, off-axis diffraction calculation is achieved in a convolution kernel translation mode, serious calculation redundancy caused by the fact that a calculation domain is greatly expanded in a traditional method is avoided, meanwhile, calculation distortion introduced by FFT is eliminated through the theoretical minimum filling amount, the method can be equivalent to direct calculation of a Rayleigh-Sommerfeld diffraction formula in numerical value, and the calculation accuracy is improved. And extremely high and stable calculation precision can be maintained at any diffraction angle.

This invention discloses a lithography simulation method and system based on circular sampling function decomposition and superimposed pupil shift matrix. The method includes: sampling the shape function and pupil function of the extended light source to obtain the corresponding superimposed pupil shift matrix; processing the superimposed pupil shift matrix, the frequency domain circular sampling function matrix of the extended light source and the pupil plane to obtain the frequency domain cross-transmission coefficient matrix and the projection matrix; performing singular value decomposition on the projection matrix to obtain the singular value decomposition result; processing the spatial domain circular sampling function matrix based on the singular vectors to obtain the convolution kernel matrix; constructing a spatial domain image simulation model based on the singular value decomposition result, the convolution kernel matrix and the initial Hopkins model; and obtaining the spatial domain image simulation result based on the spatial domain image simulation model. This invention utilizes the superimposed pupil shift matrix method and analytical circular sampling function decomposition, which can reduce the direct calculation and storage of the TCC matrix and significantly reduce the computational cost required to obtain the kernel.

The application provides a regular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the regular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The invention discloses a privacy protection federated learning security aggregation method, apparatus and device, and a medium, a double-server federated learning architecture is constructed based on a double trap door homomorphic encryption technology, and it is ensured that the privacy of client-side related information is not disclosed in a poisoning attack detection and global model aggregation process. On the premise of strictly guaranteeing the data privacy of a client, the difference value between elements of the gradient is directly calculated in a ciphertext state, and the difference of the gradient in element dimensions is effectively captured, so that the accurate detection of the encryption model poisoning attack in a heterogeneous data scene is realized, and finally, the detection accuracy is improved. Through a dynamic threshold Byzantine robust aggregation scheme based on an average value, the technical problem of difficult poisoning gradient elimination caused by gradient threshold dynamic change in a heterogeneous data scene is solved.

The application provides an irregular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the irregular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The present application relates to a kind of rock drilling method, rock drilling device and computer readable storage medium, including establishing OXYZ coordinate system, and origin O (0,0,0), O1 (x1,y1,z1), O2 (x2,y2,z2) and O3 (x3,y3,z3), and determine the dynamic coordinate of O2 and O3 in OXYZ coordinate system;Wherein, dynamic coordinate does not exist OO1 The length L1 of and O1O2 The length L2 of, and the freedom degree of the first arm body, second arm body and the limiting parameter between execution and corresponding connecting piece;S2: based on the dynamic coordinate of O2 and O3 in OXYZ coordinate system, calculate S3: make perpendicular to YOZ plane, its beneficial effect is that the dynamic coordinate of O2 and O3 in OXYZ coordinate system can be directly calculated by mathematical operation, application this method, can throw away specific structure difference, without structure limit to the analysis and control of the posture of arm support, and provide the specific control method of the arm support posture of control overbreak, it is convenient to implement.

A light-color computation chip, belonging to the field of data computation technology, includes: an instruction scheduling unit, a decoding unit, an optical transmitting unit, an optical receiving unit, a register buffer unit, a pre-stored code library unit, and a computation result integration unit. The optical transmitting unit, optical receiving unit, register buffer unit, and pre-stored code library unit corresponding to the same data bit collectively constitute a single-data-bit computation unit. The instruction scheduling unit receives external instructions and distributes them to the decoding unit, and receives the final computation result and outputs it uniformly. The decoding unit converts the electrical signal instructions issued by the instruction scheduling unit into corresponding bit-specific light-color codes. The optical transmitting unit outputs data light signals of corresponding colors or wavelengths according to the light-color codes. Advantages: It adopts a novel architecture combining direct wavelength encoding and lookup table operations, achieving a simplified, low-latency, and modularly expandable direct computation architecture.

This invention relates to the field of police information technology, specifically disclosing a police information recommendation method and system based on facial recognition. After successful facial recognition, multi-dimensional security policy parameters, including the operating entity, task type, and environmental tags, are collected. These parameters are then combined with a target identifier to construct a joint arbitration request and homomorphically encrypted. The encrypted request is distributed to at least two independent data access control nodes. Each node performs direct computation on the ciphertext based on its local private rules, generating and returning an encrypted partial arbitration result. A secure arbitration service aggregates all encrypted results to form a final encrypted arbitration result. This result is decrypted to obtain the plaintext arbitration conclusion, which is then used to filter and output a customized information list matching the current scenario from the associated database. This invention achieves secure collaborative adjudication while fully protecting the private policies and data of all parties, ensuring the accuracy and security of information recommendations.

The application discloses a kind of hard real-time Gamma implementation method and medium for machine vision based on approximate compensation method, and the implementation method is transformed by Gamma algorithm basic formula, and the exponential operation is transformed into multiplication and shift operation suitable for processor such as FPGA implementation, the precision lost in transformation process is compensated using Taylor expansion, and lookup table is used to assist calculation for some fixed subitems not suitable for direct calculation, a kind of gamma coefficient real-time variable and change range unlimited Gamma algorithm implementation mode is provided.The RAM and LE resource consumption of the algorithm are moderate, the lookup table used in the algorithm does not change with input bit width, and it is an implementation mode based on current gamma coefficient real-time calculation result to solve the problems existing in the prior art Gamma algorithm, and provide an effective new implementation means of Gamma algorithm for machine vision field data processing and data display.

The invention belongs to the technical field of operation and control of a grid-following converter, and discloses a method, a system and equipment for determining a transient synchronous stability boundary of the grid-following converter, and a medium, so as to solve the problems that an existing analysis method is limited by specific working conditions and is insufficient in universality and the like. The method comprises the following steps: a transient simulation step; an energy calculation step; an energy margin calculation step; a sensitivity calculation step; a critical value searching step; and determining a stable boundary. Aiming at the problem that an existing method is limited by specific working conditions and is poor in accuracy due to model simplification, the method comprises the following steps: establishing an accurate transient simulation model, introducing a mechanism for adaptively calculating the maximum potential energy, dynamically and intelligently selecting direct calculation, disturbance iteration or voltage adjustment paths according to a power angle track, and calculating the maximum potential energy according to the power angle track. It is ensured that the method can be applied to different power grid structures, faults and operation modes, the real stability boundary is accurately captured, and accurate evaluation of transient synchronization stability is achieved.

The application discloses a kind of MMC-BESS low-computing amount extended level model predictive control methods, adopt hierarchical architecture: output current control layer is determined theoretical optimal level by minimizing current envelope area, and take its adjacent two integer levels as candidate, only evaluate 2 candidates can obtain optimal output level, constant 2 with the number of sub-modules, irrelevant;Based on the result, the circulating current control layer obtains the optimal bridge arm input combination by direct calculation and rounding, without exhaustive search, the amount of calculation is zero.Simultaneously set bridge arm input combination boundary constraint mechanism to ensure physical realizability.This method completely eliminates the tuning problem of weight factor in traditional model predictive control, the total amount of calculation is extremely low and does not increase with the number of sub-modules, with excellent output current quality, circulating current suppression ability and sub-module state of charge balancing performance, especially suitable for large-scale modular multilevel energy storage system.

The application discloses a complex robot system robust invariant set constraint sparsification method, and belongs to the technical field of robot control.The method comprises the following steps: clustering and dividing constraints according to the constraint distribution of a convex set; and simplifying redundant constraints and obtaining a simplified approximate convex set, since the convex set vertexes of a sub-group in a group are gathered in one region, and the description of the convex set vertexes to the constraints is redundant; and limiting the error between the simplified approximate convex set and the original convex set within a preset range, and obtaining a constraint set which can be directly calculated.The method can accurately describe the space geometric characteristics of the robust invariant set by means of geometric analysis and sparsification processing with a small amount of key constraints, and significantly reduces the calculation complexity, so that the robust control algorithm can meet the real-time control requirements of the complex robot system.

This invention belongs to the field of communication equipment security protection technology, and discloses a method for characterizing the static safety margin of power systems based on the truncated polynomial approximation method. This method first maps the load growth factor to complex-domain embedded variables, establishing a fully embedded power flow model; then, it expands the system state variables into high-order truncated polynomials, transforming nonlinear terms into linear convolutions between coefficients through Cauchy products, and solving for the polynomial coefficients using linear recursion; subsequently, it constructs Padé approximation rational functions to achieve analytical extension, directly calculating the high-load operating condition solution exceeding the original series convergence radius; finally, through a multi-stage continuity tracking strategy, it adaptively approximates the voltage collapse critical point, synthesizing the system's static safety margin. This invention abandons the reliance of traditional iterative algorithms on Jacobian matrix inversion and initial value guessing, fundamentally avoiding numerical ill-conditioned problems near the critical point, and achieving rapid characterization of static safety margins with large step size, high precision, and global robustness.

The present invention provides a method for predicting remaining useful life of bearings based on a gated recurrent neural network, comprising the following steps: S1. obtaining full life cycle vibration signals of bearings, extracting the vibration distribution features and creating a training set of gated recurrent neural network; S2. constructing a gated recurrent neural network model, and introducing an attention mechanism that directly calculates weights to improve the integrity of extracting temporal information; S3. adding a Bayesian layer to construct a nonlinear mapping relationship between temporal information and remaining useful life; S4. taking vibration signals of a test bearing as input, the output result of the gated recurrent neural network model is the remaining useful life of the test bearing at the current time. The present invention does not need to add additional neural network layers, which avoids the problem of increasing the complexity of the model. The integrity of extracted information is improved through weighted fusion of temporal information extracted at different time. Moreover, by adding a Bayesian layer, the traditional point prediction results are converted into interval predictions, to consider the prediction uncertainty of remaining useful life of bearings.

The present application relates to the field of artificial intelligence, and discloses an intention recognition method and device based on a loss function, equipment and a storage medium, which are used for directly calculating the influence of each label in a text on a loss function and improving the recognition ability of a model for multiple intentions. The method comprises the following steps: obtaining a to-be-recognized text, which is used for indicating at least one intention of a target user; calling an input layer of an improved machine learning model FastText to perform word segmentation on the to-be-recognized text and obtain a plurality of segmented vectors; calling a hidden layer of the improved FastText to perform superposition averaging on the plurality of segmented vectors and obtain a document vector; calling a binary classification cross-entropy loss function BCELoss to calculate each potential intention in the document vector and obtain loss values of the plurality of potential intentions; screening the loss values of the plurality of potential intentions according to the loss values corresponding to each potential intention and a pre-set threshold value, and determining a plurality of candidate intention labels of the to-be-recognized text based on the screened loss values.

The invention relates to the technical field of grease extraction, and discloses a grease extraction process parameter optimization method and system, and the method comprises the steps: representing a product order as a target quality vector, and constructing a quality function based on the target quality vector; based on the quality function, constructing a reverse mapping model from the target quality vector to the process parameters, and outputting the optimal process parameters by the reverse mapping model; based on the optimal process parameters, constructing a multi-constraint model to obtain optimized process parameters; based on the optimized process parameters, constructing a dynamic control model, and dynamically adjusting the process parameters according to actual parameters; a traditional forward test method is changed by establishing a reverse mapping model from terminal product quality specifications to grease extraction process parameters. Through the combination of the deep neural network and the genetic algorithm, the optimal process parameter combination can be directly calculated according to the specific quality requirements of customer orders, the production time is shortened, and the production cost is reduced.

The invention discloses a suspension system and method based on natural coordinate modeling. The suspension system is used for identifying suspension hard point parameters and comprises a kinematic model, a suspension sensitivity analysis and calculation model and a suspension hard point parameter identification module. A kinematic model of a suspension multi-rigid-body system is established based on a natural coordinate method, the number of generalized coordinates in the model derivation process is reduced, the model derivation process is simplified, and the model solving speed is increased. An adjoint variable method is adopted to solve the sensitivity value of the suspension hard point natural coordinates to the suspension kinematics characteristic parameters, direct calculation of derivatives is avoided by introducing additional variables, and the solving complexity is reduced. And a group of design variables which have great influence on the kinematics characteristics of the suspension system are screened out according to the sensitivity analysis result, so that the calculation amount of an identification algorithm is reduced. And a BFGS variable scale optimization algorithm and a golden section method are adopted, so that the optimality of parameter identification is ensured, and a high-precision hard point coordinate identification result is output while the calculated amount is small.

The invention discloses a method for directly calculating the maximum power capability of an integrated energy system, which is applied to the integrated energy system comprising a power system, a natural gas system and a thermodynamic system, and comprises the following steps: S1, defining the power capability TWC of the integrated energy system as the sum of loads of all nodes, respectively establishing a power capability model and a maximum power capability model of the comprehensive energy system for the sum of all load supplies; the physical constraints of the power capability model of the integrated energy system comprise a smoke flow equality constraint and an inequality constraint; s2, using a prime-dual interior point method or a genetic algorithm to solve a maximum power capability model of the integrated energy system; and S3, the power capability corresponding to all the critical working points in the power domain of the integrated energy system is arranged in an ascending order according to numerical values to form a curve, and a power capability curve model of the integrated energy system is established and used for describing the power capability range change of the critical working points.

This invention discloses an irregular subarray partitioning design method for a low-sidelobe wide-angle scanning array antenna, solving the problem of slow sidelobe level calculation and long optimization time in existing technologies. The method includes: discretizing the array surface into a set of array elements; arranging and combining the array elements in the set to obtain a set of subarray position combinations, and constructing a dictionary matrix; transforming the subarray partitioning problem into a set-covering problem, solving for a binary selection vector to make the dictionary matrix and the binary selection vector form a single row vector, thus obtaining a set of candidate subarray combinations covering the array surface; constructing an irregular subarray partitioning design model; filtering the candidate subarray combinations to obtain the optimal subarray partitioning result; and using the optimal subarray partitioning result, employing the Grey Wolf optimization algorithm to optimize the excitation amplitude of the optimal subarray partitioning result to reduce the radiation pattern sidelobe level. This method replaces the direct calculation of sidelobe levels, thereby improving computational efficiency.