11 results about "Equivalent transformation" patented technology

This specification pertains to the field of refining and chemical production processing technology, and particularly relates to a method and apparatus for optimizing refining and chemical production plans for a target secondary processing unit. The method includes: obtaining parameters of the secondary processing unit under a refining and chemical production optimization scenario; constructing a nonlinear constraint equation for product output based on the parameters of the secondary processing unit; performing an equivalent transformation on the nonlinear constraint equation to obtain an equivalent transformation equation; extracting the nonlinear constraint terms and performing a Taylor expansion; transforming the Taylor expansion formula into a linear approximation equation based on the proportion of the feed material to the output material of the blending tank, the feed material quantity to the blending tank, and the feed property values ​​of the blending tank, according to the property balance constraints of the blending tank; and then substituting these into the nonlinear constraint equation for product output, thereby transforming the nonlinear constraint equation for product output into a linear approximation equation containing only material information variables. This method effectively ensures model convergence and shortens the solution time.

This invention discloses an ADRC method for attenuating periodic disturbances in time-delay systems, belonging to the field of automatic control technology. The method includes: 1. Obtaining the controlled process model and disturbance frequency, and establishing an extended state model containing the periodic disturbance; 2. Constructing a reduced-order extended state observer and tuning the gain using the bandwidth parameter method; 3. Introducing a pure time-delay module into the observer's output channel to construct an ADRC structure; 4. Revealing the mechanism by which periodic disturbances in time-delay systems cannot be attenuated through two-degree-of-freedom equivalent transformation analysis; 5. Based on the frequency domain characteristic equation, analytically determining the delay of the time-delay module to achieve effective attenuation of periodic disturbances at specific frequencies. This invention solves the problem of attenuating periodic disturbances in time-delay systems without significantly increasing structural complexity. Compared to traditional schemes that require high-gain or complex prediction structures, this invention only requires adjusting the pure time delay of the observer's output channel, and the parameter tuning process is clear and intuitive, significantly lowering the threshold for engineering applications.

The invention belongs to the technical field of chemical engineering, artificial intelligence and model compression, and discloses a uniform quantification method for a large model in the chemical engineering field. On the premise that the expression capability of a model function is not changed, orthogonal equivalent transformation is introduced, combined smoothing processing is carried out on the weight and activation in a linear layer, and activation distribution approximately obeys uniform distribution in a quantization interval by constructing an orthogonal transformation matrix and systematically remodeling the activation distribution, so that the low-bit uniform quantization error is remarkably reduced. And carrying out joint quantization on the smoothed weight and activation by adopting a uniform low-bit uniform quantizer, further introducing a small number of learnable global orthogonal parameters, and carrying out lightweight optimization on module output errors before and after quantization. According to the method, quantitative perception training or large-scale fine tuning is not needed, calculation and storage overhead is low, engineering implementation is simple, inference performance close to full precision can be kept under the 4-bit or 6-bit quantization condition, and video memory occupation and energy consumption in the model deployment process are remarkably reduced.

The application provides a heat dissipation structure design method of an intelligent processor, comprising the following steps: a model reconstruction step, combining a design process of a structure design software and a thermal simulation software, reconstructing models according to modeling results of the two design processes, and obtaining temperature results of the two design processes; an error calculation step, the thermal simulation software calculating error parameters of the two design processes according to the temperature results of the two design processes; and an equivalent transformation step, the structure design software performing equivalent transformation design according to the error parameters. The application also provides a heat dissipation structure design device of an intelligent processor, a storage medium and an electronic device. Therefore, the application fully utilizes the advantages of the two heat dissipation structure design methods, simplifies the process, reduces the design cost, and improves the design efficiency.

This invention belongs to the field of wireless communication, specifically relating to a STAR-RIS-assisted 6G integrated sensing and communication beamforming design method. The method includes constructing a STAR-RIS-assisted integrated sensing and communication system model; under constraints of transmit power, sensing performance, and multi-user service quality, establishing an optimization problem aimed at maximizing multi-user communication and speed by jointly designing the base station transmit beamforming and the transmission-reflection coefficients of STAR-RIS; transforming the optimization problem into an easily tractable equivalent form based on a weighted minimum mean square error equivalent transformation; decoupling the optimization problem based on the equivalent form into two independent sub-problems using an alternating optimization method; solving the sub-problems using a successive convex approximation method and a semi-definite relaxation method, and iteratively updating the algorithm until convergence; this invention effectively improves system communication performance while ensuring sensing performance and multi-user communication quality.

This invention discloses a simplified method and system for tuning active disturbance rejection control (ADRC) for nuclear power steam generators with time delay. The method includes: establishing a mathematical model of the steam generator; designing a time-delay ADRC controller and equivalently transforming it into a two-degree-of-freedom structure to obtain the equivalent transfer function expression of the steam generator mathematical model and the characteristic equation of the closed-loop system; obtaining the characteristic equation of the closed-loop transfer function through low-frequency approximation, further obtaining the desired tracking speed parameter, and equivalently converting the adjustment of the outer-loop controller gain into the quantitative adjustment of the desired tracking speed parameter; simplifying the analysis of the parameters of the time-delay ADRC controller; and determining the relative time delay margin as a stability index through robustness index analysis to obtain the range of values ​​for the regularized observer bandwidth. This invention improves the mathematical analysis capabilities for modeling and controlling nuclear power equipment, making the TD-ADRC controller more practical in actual nuclear power equipment operation and ensuring the safe operation of nuclear power plants.

This invention proposes a rapid prediction method for the curing process of composite materials based on transformation optics. By introducing transformation optics theory and utilizing equivalent transformations of material parameters, the method maintains the stability of electromagnetic fields, temperature fields, and stress-strain fields when the thickness of the composite material in the simulation model is artificially increased. This reduces the spatial scale differences of components in the simulation model, decreases the number of meshes and computational complexity, and shortens the simulation time. While ensuring computational accuracy, it achieves rapid prediction of the composite material curing process (curing parameters).

The application discloses a low-complexity optimal MAMP receiver coding method for large-scale MIMO, which adopts an MAMP algorithm to estimate a received signal y at a receiving end, combines all damping operations and orthogonal operations of the MAMP into a linear detection module MLD, obtains a low-complexity MAMP after equivalent transformation, uses a variational SE (VSE) function to represent an asymptotic MSE performance, and uses an I-MMSE lemma to calculate an optimal coding design principle and a maximum reachable rate of the low-complexity MAMP. The low-complexity optimal MAMP receiver for large-scale MIMO has the linear detection module MLD to perform orthogonal operation, damping operation and linear detection processing on the received signal y, and has the nonlinear detection module NLD to perform demodulation and decoding processing on the received signal y, and has the characteristics of low complexity and optimal constrained capacity, is suitable for an encoded GMIMO communication system, and uses a simple back-off damping ratio which is more robust than an optimal analytical damping used by a previously uncoded system.

This invention relates to the field of smart grid technology, and discloses a dynamic equivalent aggregation method, system, and medium for wind farms that considers sub- to supersynchronous oscillation characteristics. The method calculates the impedance sensitivity of doubly-fed induction generator (DFIG) control parameters in the sub- / supersynchronous frequency band based on the finite difference method, identifying key control parameters affecting the system impedance characteristics. It performs an equivalent transformation on the wind farm collector network, converting the hybrid structure to a parallel structure, and groups the wind turbine output voltages according to their oscillation mode characteristics. Then, it uses a capacity-weighted method to obtain the initial parameters of the equivalent machine. Finally, it uses a particle swarm optimization algorithm to identify and optimize the key control parameters of the equivalent model. This invention's dynamic equivalent aggregation method for wind farms effectively preserves the dominant oscillation modes and key dynamic characteristics of wind farms in the sub- / supersynchronous frequency band, significantly improving the accuracy and efficiency of large-scale wind farm grid-connected oscillation simulation analysis.

The present application relates to the field of hydraulics calculation and hydraulic engineering design, in particular to a trapezoidal open channel hydraulics characteristic water depth solving method and related products, including a method for solving the critical water depth of a trapezoidal open channel and a method for solving the normal water depth of a trapezoidal open channel; the method obtains the section parameters and the hydraulic parameters and is dimensionless; the variable substitution is performed on the critical water depth equation, which is converted into a single variable sixth algebraic equation and the high-order iteration root finding is adopted to obtain the critical water depth; the logarithmic domain equivalent transformation is performed on the normal water depth equation to construct the root equation, and the small water depth asymptotic solution and the large water depth asymptotic solution are fused by a smoothing weight function to generate the global continuous initial value, and then the normal water depth is obtained by iteration; the residual self-checking and numerical anomaly detection are implemented in the iteration process, and when triggered, the preset low-order robust algorithm is automatically returned to correct until convergence; while ensuring the accuracy, the stability and efficiency in the difficult convergence condition are improved, and the method is suitable for the automation and batch condition calculation of water conservancy information system.