13results about How to "Guaranteed analytical accuracy" patented technology

The invention relates to seawater analysis, and particularly provides a desalting and purifying device and system applied to seawater tritium on-line monitoring, the device comprises a first-stage unit, the first-stage unit comprises a first membrane assembly and a filter which are connected in sequence; the first pressure pump is used for increasing the pressure of seawater entering the first membrane assembly, and a waste discharge port of the first membrane assembly is communicated with a waste liquid pipeline. The method has the advantages of automation, high analysis precision and the like.

The present application relates to a kind of ground potential discrete solving method for stray current space propagation analysis, including zoning profile according to the stratum space of study area, and in the region where current injection is strong, finer spatial division scale is used, in the part far from the region of interest, coarser division scale is used, to give consideration to calculation accuracy and solving efficiency;Stray current source is equivalently distributed to adjacent discrete unit node, and overall potential solving equation is established based on the conductive relationship between nodes;By numerically solving global discrete equation, the potential distribution and risk influence result of ground surface and the periphery of target facility are obtained.Compared with prior art, the present application can effectively reduce the calculation amount of large-scale space solving under the premise of maintaining high calculation accuracy, and is suitable for scenarios such as rail transit stray current intrusion, grounding grid potential analysis and transformer dc magnetic bias evaluation.

This invention relates to the field of aero-engine technology and discloses a Simpack-based method for analyzing the misalignment vibration of aero-engine blades with bosses. While ensuring analytical accuracy, it improves computational efficiency by simplifying the modeling process and establishes a clear mapping relationship between parameters and responses, thus providing reliable technical support for vibration control of aero-engine bladed disk systems. The method includes the following steps: establishing finite element modal analysis models of all boss blades and disks, and performing free modal calculations; using Simpack modal condensation to establish blade-disk reduced flexible body models of all boss blades and disks, and then assembling them to form a complete blade-disk coupled dynamic analysis model of the aero-engine; subsequently, simulating the frictional vibration reduction effect between boss blades by establishing pre-compressed spring damping units or custom nonlinear spring units between the bosses of adjacent boss blades; and simulating the interference fit relationship between bosses by using the spring pre-compression amount.

The embodiment of the invention relates to a data processing method, electronic equipment, a storage medium and photoetching equipment. The data processing method comprises the steps that for each block of a target layout, defect values of defect points in each block are sequenced according to defect types, so that sequenced defect data of each block are obtained, and the defect values indicate the severity of defects; grouping the sorted defect data of each block based on a pattern corresponding to the defect points in each block to obtain a plurality of grouped defect data of each block; filtering the plurality of grouped defect data of each block to obtain filtered defect data of each block; and obtaining full layout defect data of the target layout based on the filtered defect data. According to the embodiment of the invention, on the premise of ensuring the analysis precision, the memory and the calculation time required by full-chip defect grouping can be greatly reduced.

The application relates to the technical field of electrical engineering, and discloses an inverter multi-machine dynamic power angle stability analysis method, system, equipment and medium, which comprises the following steps: small signal modeling is performed on grid-following inverters and grid-forming inverters to obtain a frequency domain impedance model of a grid-following and grid-forming hybrid converter station; a power expression under a dynamic phasor method is constructed according to the frequency domain impedance model; a small signal coefficient equation under the dynamic phasor method is calculated based on a power transmission equation under the dynamic phasor method; the parameter frequency characteristics corresponding to the grid-following inverters and the grid-forming inverters are analyzed according to the small signal coefficient equation; and the parameter frequency characteristics are used to determine the inverter multi-machine dynamic power angle stability analysis result of the grid-following inverters and the grid-forming inverters. The application can realize accurate analysis of low-frequency power angle oscillation characteristics and stability of the hybrid inverter station.

The application discloses a kind of based on edge cloud cooperation's inspection robot visual analysis task dynamic scheduling method and system, belong to inspection robot visual analysis and edge computing technical field.The method includes: real-time acquisition network state parameter and computing power resource information;Task feature vector is constructed to the visual analysis task and is extracted feature;Based on multi-objective optimization scheduling model, delay, energy consumption and accuracy index are determined optimal execution position by comprehensive evaluation;Task is distributed to corresponding node execution;Based on Q-learning reinforcement learning, scheduling weight is dynamically updated.The application can realize the optimal scheduling of visual analysis task under the dynamic change of network and computing power environment, compared with the scheduling efficiency of existing static allocation strategy is improved by more than 40%, and the comprehensive performance is significantly better than local execution, full cloud execution and static allocation scheme.

The application provides an arch dam simulation analysis method and system based on terrain and geological reconstruction, which comprises the following steps: based on dam body parameterization control information, generating dam body flood discharge orifice, full-elevation radial twist surface transverse joint and foundation surface transition thin layer, and constructing an arch dam body structure model; based on terrain and geological data, reconstructing dam shoulder slope, and establishing a closed excavation simulation terrain model; based on weathering layer and structure surface information, constructing a geological partition model through topological cutting, boundary closing and redundant body elimination; integrating the arch dam body structure model and the geological partition model; classifying, extracting and segmenting dam body structure control lines, excavation boundary control lines and structure surface control lines, and generating an overall three-dimensional finite element grid; according to the partition result, corresponding material parameters are given, boundary conditions and external loads are applied for numerical solution, so that fine simulation analysis and result output of an arch dam-foundation system under real terrain and geological conditions are realized.

The application discloses a kind of based on multi-modal fusion's emission compliance self-checking and self-correcting system, comprising: multi-modal data acquisition module, for collecting the multi-source data of enterprise emission facilities and pre-processing;Multi-modal feature coding module, for respectively feature coding to multi-modal data set;Double-channel feature construction module, for constructing current channel feature and contrast channel feature;Contrast space-time cross attention feature extraction module, for by double-channel contrast space-time cross attention network, output comprehensive space-time difference feature representation;Regulation knowledge graph matching module, for generating compliance determination result and regulation clause information;Self-correcting task generation module, for generating self-correcting task;Task execution and closed-loop management module, for recording self-correcting task execution process.The application adopts double-channel contrast space-time cross attention network, realizes emission behavior intelligent identification and automatic compliance self-checking and self-correcting.

The invention discloses a microwave drying sample preparation method of a copper-nickel sulfide ore pulp sample, which comprises the following steps: S1, microwave dehydration: putting a wet ore pulp sample into a microwave drying unit, and drying until the water content of the sample is reduced to below 1%; s2, intermediate crushing and division: putting the dried sample into an intelligent double-roller crushing and division machine, crushing until the particle size is less than 2mm, and performing division, so that the recovery rate is greater than 99%; s3, fine crushing and sweeping; and S4, analysis and detection: carrying out elemental chemical analysis on the prepared sample. According to the invention, the dehydration time is greatly shortened, meanwhile, the sample deterioration is avoided, the dried sample is treated by the intelligent double-roller crushing division machine and the intelligent crusher with a self-cleaning function, the efficient and automatic sample preparation is realized, and finally, the sample meeting the analysis requirement is obtained; the technical problems that a traditional method is low in efficiency, large in labor intensity and prone to overheating in concentrate drying and the like are solved, and rapid and accurate detection guarantee is provided for mineral separation production.

The present application belongs to the field of sewage treatment, and provides a chemical industry park groundwater pollution tracing method based on geophysical exploration cooperation, which uses geophysical methods to detect target areas in the chemical industry park, and obtains underground electrical parameter data; based on the spatial form characteristics and physical parameter gradient change law of the resistivity anomaly area, a layout scheme of groundwater chemical sampling target points is determined; groundwater samples are collected according to the layout scheme, and chemical detection analysis is performed; the pollutant data obtained by the chemical detection analysis is subjected to spatial position corresponding and correlation analysis with the resistivity three-dimensional model; the pollutant concentration spatial distribution map, the park enterprise layout and the regional hydrogeological conditions are comprehensively considered to identify the pollutant migration path, lock the pollution source and output the pollution tracing result. The method improves the accuracy of pollution tracing.

The invention relates to a cut tobacco detection system and a cut tobacco detection method.The cut tobacco detection system comprises a screening assembly, a bearing table, a flattening assembly, a transfer assembly, a detection assembly and a controller, the screening assembly comprises a vibrating screen plate, and the screen plate is provided with a first screening area, a first end and a second end, tobacco shreds on the screen plate slide from the first end to the second end under the vibration effect, and the bearing table corresponds to the first material screening area and is provided with a bearing part used for bearing object tobacco shreds screened and falling from the first material screening area. The transfer assembly is provided with a sampling transfer end with the position and angle adjustable, and the sampling transfer end is used for transferring part of tobacco shreds on the feeding channel to the sieve plate and transferring the flattening assembly to conduct flattening action. The detection assembly has a detection end; the controller is in communication connection with the transfer assembly, the detection assembly and the screening assembly. The problems that a tobacco shred detection system is insufficient in detection sample representativeness, difficult in image processing and limited in measurement precision and accuracy can be solved.

The application relates to the technical field of noise and vibration control of an automobile electric driving system, in particular to a power assembly NVH (Noise, Vibration and Harshness) performance analysis method and device, a vehicle and a storage medium, wherein the method comprises the following steps: obtaining a target demand torque and harmonic parameters of a motor, and simulating a current value of the motor according to the target demand torque and the harmonic parameters; determining electromagnetic force excitation of the motor according to the current value and the target demand torque; obtaining system parameters, a three-dimensional mathematical model and motor structure parameters of a power assembly, and establishing a dynamics model of the power assembly according to the system parameters, the three-dimensional mathematical model and the motor structure parameters; performing coupling calculation of electromagnetic force and mechanical structure according to the electromagnetic force excitation and the dynamics model; analyzing node vibration response of the power assembly according to a result; and generating an NVH performance analysis result of the power assembly according to the node vibration response. Therefore, the problems of long cycle, lack of refined calibration basis, low scheme evaluation efficiency and weak risk prediction ability in the harmonic injection strategy scheme verification technology are solved.

The invention discloses a carrier rocket sub-level wreckage landing area automatic off-line analysis method and a carrier rocket sub-level wreckage landing area automatic off-line analysis system. The carrier rocket sub-level wreckage landing area automatic off-line analysis method comprises the following steps of performing data reading; determining an administrative region of the sub-level wreckage drop point according to the read data; after the administrative region of the sub-level wreckage drop point is determined, the administrative region of the sub-level wreckage drop point is determined; and according to the determined administrative region of the sub-level wreckage falling region, determining an administrative unit covered by the sub-level wreckage falling region. According to the method, automatic output of the administrative region where the sub-level wreckage drop point is located, the administrative region where the drop region is located and the administrative unit covered by the drop region is achieved, manual analysis of trajectory designers is not needed, and the manual operation intensity is greatly reduced.