15 results about "Flux distribution" patented technology

The application provides a PGNAA detection data comprehensive analysis method, which relates to the technical field of detection and comprises the following steps: acquiring the first element content, neutron absorption cross section and environmental temperature variation amount and humidity of a sample to be detected; adjusting the ray self-absorption correction coefficient of the first element content, adjusting the flux distribution based on the neutron absorption cross section, calibrating the peak position based on the environmental temperature variation amount, and correcting the background based on the environmental humidity; and through case-by-case processing, when the relevant parameters exceed the threshold value, the synergistic calculation and simulation are adopted, otherwise the standard value is used, so that the accurate comprehensive analysis of the PGNAA detection data is realized, and the accuracy and adaptability of the detection result are improved.

To provide a method for calculating a nuclear constant in consideration of an influence of a heterogeneous medium in a core axial direction.SOLUTION: The calculation method is a calculation method executed by a computer, and includes calculating a first neutron flux distribution in an axial direction of a reactor core by three-dimensional non-homogeneous single assembly calculation, and calculating a second neutron flux distribution in the axial direction of the reactor core by three-dimensional homogeneous single assembly calculation. A step of calculating a second neutron flux distribution in the axial direction of the core, a step of calculating an axial distribution of a correction factor such that a reaction rate based on the first neutron flux distribution can be reproduced by a three dimensional homogeneous single cluster calculation to which a correction factor of a nuclear constant based on a ratio between the first neutron flux and the second neutron flux is applied; The method includes a step of updating the second neutron flux distribution, a step of calculating the axial distribution of the correction factor until the correction factor converges, and a step of repeating the step of updating the second neutron flux distribution.SELECTED DRAWING: Figure 1

A kind of detection method and detection equipment of flux distribution condition can be used to show the flux of electronic component surface.For the bump area of electronic component, according to the predetermined thickness of the applied flux, to select the first bump area imaging mode with low angle of light irradiation or the second bump area imaging mode with high angle of light irradiation.The first bump area imaging mode adopts the imaging angle of 80-100 degrees with the carrier plate of the electronic component to obtain the image.The second bump area imaging mode adopts the imaging angle of 60-70 degrees with the carrier plate of the electronic component to obtain the image.For the non-bump area of electronic component, high angle of light irradiation is used and the imaging angle of 80-100 degrees is used to obtain the image.In this way, the flux distribution of bump area and non-bump area can be correctly shown under different detection conditions.

The application belongs to the technical field of motor design, and discloses a mine vernier motor topology construction method based on magnetic conductance harmonic reconstruction. First, a mathematical representation model of torque density, power factor and torque fluctuation about the characteristic parameters of magnetic conductance harmonic is established to reveal the internal correlation mechanism. On this basis, by actively introducing new-order beneficial magnetic conductance harmonics in the initial magnetic conductance harmonic set, a comprehensive optimized target magnetic conductance harmonic set is constructed, and the amplitude and phase of each key magnetic conductance harmonic in the target magnetic conductance harmonic set are reconstructed to enhance the positive contribution to the average torque, suppress the torque ripple component and optimize the armature flux distribution, so that the collaborative improvement of high torque density, high power factor and low torque fluctuation is realized in the mine low-speed direct drive scene. The application breaks through the limitations of traditional forward design, realizes the reverse construction from the electromagnetic performance target to the topology structure, is easy to achieve global optimization, shortens the design cycle and reduces the development cost.

A method includes receiving a plurality of data sets, wherein the plurality of data sets includes a measured low-energy electrons that is less than or equal to 1.5 MeV, and wherein the plurality of data sets further includes data associated with solar wind. The method further includes receiving measured data associated with higher electron events of greater than or equal to 2 MeV. In response to a selection of at least two data sets from the plurality of data sets, and further in response to a selection of one or more machine learning (ML) algorithms from a plurality of ML algorithms, and further in response to a selection of a number of window size, a plurality of ML models is generated based on the selections as an input and the measured data associated with higher electron events of greater than or equal to 2 MeV as its output.

The invention discloses a global-local coupling refined burnup calculation method for a high-flux reactor irradiation duct. The method comprises the following steps: 1, global reactor core calculation: carrying out component few-group homogenization section calculation and reactor core steady-state simulation by using a deterministic theory program to obtain neutron flux distribution; 2, local target transportation: establishing a fine local model by using a Monte Carlo program with reactor core flux distribution as a boundary condition, and carrying out high-precision transportation calculation to obtain fine neutron flux and cross section of the target; and 3, target burnup calculation: carrying out target burnup analysis by utilizing Monte Carlo output. And 4, burnup of other components: calculating burnup of other components of the non-irradiation target piece through a deterministic theory program. And 5, coupling iteration: determining a target section of a theoretical program by using Monte Carlo high-precision section correction, and restarting reactor core calculation to realize global-local burnup coupling of the whole reactor core. And 6, circularly judging: if the target burnup is not reached, repeating the steps 1-5, otherwise, ending. The method can solve the problem of section deviation caused by difficulty in obtaining local fine neutron-flux density and distortion of boundary conditions by a deterministic theory program, improves the target burnup calculation precision and efficiency, and is suitable for high-flux reactor irradiation target analysis.

The application provides a high-resolution emission flux inversion system and method, and the method comprises the following steps: collecting multi-source atmospheric data; determining a distance weight function to calculate the correlation between grid points in a simulation area and observation values; generating a set sample satisfying physical constraints of an assimilation object; performing singular value decomposition dimension reduction on the set sample; replacing tangent linearity and accompanying mode of a regional air quality model with a hybrid assimilation method to obtain an analysis increment of a spatial grid point in the simulation area; obtaining revised concentration and flux distribution data; and performing emission flux inversion on the data to estimate emission flux per unit time at different positions. The hybrid assimilation method is used to replace the traditional four-dimensional variation mode, so that the calculation and programming difficulty is reduced; the four-dimensional sliding sampling algorithm is used to generate a set sample and reduce the dimension, so that the consumption of calculation resources is controlled; the combined assimilation algorithm is introduced to optimize the concentration and flux field, and high spatiotemporal resolution emission flux precise inversion is realized.

This application relates to the field of high-power high-frequency power supply technology, and discloses a method and device for high-frequency application of planar transformers based on nanocrystalline magnetic cores. The method first establishes a simulation model and collects multi-physics field measured data, fusing them to form a full-dimensional multi-field dataset to accurately locate flux concentration areas, loss hotspot areas, and stress distortion areas. Then, it extracts flux features, constructs a magnetic domain-flux-loss coupling feature vector, and locates abnormal regions. Subsequently, it prepares a gradient nanocrystalline magnetic core based on the abnormal data, optimizes the core structure and winding topology to match the current and flux distribution. Next, it integrates the core and windings, adjusts the magnetic domain flux distribution, and debugs the matching state. Finally, it verifies the optimization effect through retesting, iteratively updates parameters, and solidifies a standardized parameter system. This application can effectively suppress high-frequency eddy current losses, improve uneven flux distribution and local overheating problems, enhance transformer operating efficiency and reliability, and achieve low-loss, high-stability high-frequency operating performance.

The invention belongs to the technical field of motor design, and discloses a mining vernier motor topology construction method based on magnetic conductance harmonic reconstruction. The method comprises the following steps: firstly, establishing a mathematical representation model of torque density, a power factor and torque ripple about magnetic conductance harmonic characteristic parameters, and revealing an internal correlation mechanism of the mathematical representation model; on the basis, beneficial magnetic conductance harmonics of a new order are actively introduced into the initial magnetic conductance harmonic set, a comprehensively optimized target magnetic conductance harmonic set is constructed, and the amplitude and phase of each key magnetic conductance harmonic in the target magnetic conductance harmonic set are reconstructed, so that the target magnetic conductance harmonic set is obtained. Therefore, the forward contribution to the average torque is enhanced, the torque pulsation component is suppressed, and the armature flux linkage distribution is optimized, so that the cooperative improvement of high torque density, high power factor and low torque ripple is realized in a mining low-speed direct drive scene. According to the method, the limitation of traditional forward design is broken through, reverse construction from an electromagnetic performance target to a topological structure is realized, global optimum is easy to achieve, the design period is shortened, and the development cost is reduced.

A spatially-resolved thin-film deposition system and method are disclosed. The system includes a feed-in subsystem configured to deliver precursor material to a crucible under vacuum conditions, a crucible housing containing a crucible operable at a temperature sufficient to vaporize the precursor material, a transfer-tube / manifold assembly fluidly coupled to the crucible, and a nozzle array coupled to the manifold and configured to direct vaporized precursor material toward a substrate. The transfer-tube / manifold assembly is maintained at a temperature sufficient to maintain the precursor material in a vapor phase and to inhibit condensation along the vapor path, with closed-loop temperature control maintaining stability within about ±0.5° C. The nozzle array comprises spatially resolved outlets arranged to regulate vapor-flux distribution across large-area or small-area substrates, achieving film-thickness uniformity within about or better than ±(3-4)% for substrates of about 1216 mm width and within about or better than ±2% for substrates of about 300 mm width. The system may deposit films having thicknesses of ≤4 μm, and in some embodiments from about 1.0 μm to about 3.0 μm, at deposition rates corresponding to substrate cycle times of about 3 to about 20 minutes, under vacuum pressures of about 10−6 to about 10−Torr.

The application belongs to the technical field of permanent magnet motor modeling, and discloses a mathematical modeling method of an asymmetric interior permanent magnet motor, which specifically comprises the following steps: considering that the permanent magnet axis of the asymmetric interior permanent magnet motor is ahead of the maximum reluctance axis by 45 degrees of electric angle, selecting the permanent magnet axis as a reference direct axis, and establishing an air gap distribution function of the asymmetric interior permanent magnet motor; according to the air gap distribution function, successively establishing winding magnetic potential, magnetic density and flux distribution functions under the action of A-phase, B-phase and C-phase currents, and calculating an inductance matrix of the asymmetric interior permanent magnet motor; performing park transformation on the motor model in a three-phase coordinate system to obtain a mathematical model of the asymmetric interior permanent magnet motor in a corresponding dq coordinate system. The application realizes the establishment of the mathematical model of the asymmetric interior permanent magnet motor considering the magnetic axis offset, and provides a model basis for the control method design and operation performance analysis of the asymmetric interior permanent magnet motor with improved torque component utilization.

The present application discloses a method and apparatus for analyzing an emission energy spectrum of an X-ray tube assembly, and a storage medium. The method comprises: setting relevant parameters of key structures in a target model, and setting different incident electron energies of electron beams incident on the target model, wherein the target model is a pre-constructed simplified model corresponding to the X-ray tube assembly, the key structures comprise an X-ray tube window, an insulating oil layer, and a tube assembly window, and the relevant parameters comprise material density, material thickness, and structural cross-sectional area; using Monte Carlo software to calculate flux distributions of X-rays exiting the target model under the condition of different incident electron energies; analyzing the flux distributions to determine emission energy spectra of the X-rays exiting the target model when the electron beams having the different incident electron energies are incident on the target model; and on the basis of the emission energy spectra, determining whether the X-ray tube assembly meets design requirements.

The application provides a comprehensive energy efficiency evaluation method and system for a smart park, comprising: constructing a nonlinear metabolic matrix reflecting the energy correlation relationship between devices, and solving the optimal metabolic flux distribution through mixed integer nonlinear programming; defining an interaction rule library of the metabolic network, dynamically triggering the rules and adjusting the real-time metabolic flux according to real-time sensor data; calculating the quantitative values of each energy efficiency index according to the real-time metabolic flux, quantifying the uncertainty through fuzzy entropy theory, dynamically allocating the multi-objective weight, and calculating the comprehensive energy efficiency score; calculating the quantitative values of each energy efficiency index under the optimal state according to the optimal metabolic flux distribution, comparing the fuzzy entropy, determining the energy efficiency index to be optimized, identifying the high-risk and potential risk, and formulating the optimization strategy. The application considers various devices and energy flow conditions in the park, accurately reflects the energy efficiency level of the system, dynamically adjusts the evaluation according to real-time data, identifies and solves the uncertainty factors of the energy system, and ensures the efficient and stable operation of the system.

This invention discloses a method for constructing a neutron transport order reduction model based on component-level domain decomposition coupling. It employs a core architecture of "divide and conquer, numerical flux coupling." In the offline stage, "operational condition vectors" are extracted from fuel components as subdomains, and their dimensionality is reduced through sampling and independent solving. This constructs a dedicated neutron angular flux basis function library categorized by component type, energy group, and orientation angle. In the online stage, the entire reactor core is treated as a component network. Low-dimensional expansion is performed within each subdomain using basis functions. Based on the upwind numerical flux mechanism of discontinuous Galerkin (DG), robust coupling with physical conservation between components is achieved. Finally, a global block sparse linear equation system is assembled and solved to reconstruct the full-core angular flux distribution. This significantly reduces the offline cost to an acceptable range, ensuring high-precision reconstruction and numerical stability of the method for local non-uniformity. While maintaining high fidelity accuracy, it achieves a computational efficiency improvement of more than three orders of magnitude.

This invention discloses a flux application method for SMT soldering based on regional solder joint density, belonging to the field of surface mount technology. The method includes: S10: acquiring relevant information on the PCB board, including the arrangement of solder joints on the pads, and distinguishing them based on the arrangement, including distinguishing high-density solder joint areas and low-density solder joint areas on the PCB board; S20: collecting relevant data based on the distinction results, including the size of the hole positions corresponding to each solder joint in the high-density and low-density solder joint areas, and the spacing between adjacent hole positions. This invention, by distinguishing between high-density and low-density solder joint areas, dynamically simulates and adjusts the flux dosage for different hole positions, effectively avoiding bridging, cold solder joints, and contamination problems caused by improper flux dosage during the soldering process. It also improves production efficiency and product quality, achieving precise and efficient flux application.