243results about How to "Accurate calculation" patented technology

The invention provides a non-power-cut test method for mutual inductance parameters of a power transmission line under excitation of different-frequency signals and a related device, and solves the problems of difficulty in accompanying stop and high safety risk of adjacent lines. The method comprises the following steps: selecting one circuit in the same corridor for power failure, connecting the head end with an induced electricity suppression device, and performing three-phase short-circuit grounding at the tail end; injecting a different-frequency sinusoidal current of 45-55Hz into the power failure line; the synchronous measurement device collects head and tail voltage and current of a running line based on a satellite synchronous clock; extracting pilot frequency signals through two-stage notch filtering and Fourier transform; and different-frequency zero-sequence self-impedance and mutual impedance are calculated and converted into power-frequency impedance. According to the invention, accurate test without power failure can be realized, and safety and power supply reliability are guaranteed.

The invention provides equipment and a method for testing the emission amount of harmful gas in a tunnel, and relates to the technical field of tunnel construction. Comprising a sleeve, a gas parameter testing unit installed on the sleeve, a water tank communicated with the interior of the sleeve and a gassing module installed on the water tank, and the gassing module is connected with the gas parameter testing unit; one end of the sleeve can be dynamically sealed with the drill rod, and the other end of the sleeve is of an opening structure; the gassing module is used for separating out gas in water and conveying the gas to the gas parameter testing unit; and the gas parameter testing unit is used for detecting the concentration and flow velocity of harmful gas in the sleeve and the concentration of harmful gas separated out from water. A gas parameter testing unit is arranged to monitor the data change of gas gushing out of the drill hole in real time; the gassing module can separate out gas in water in real time and convey the gas to the gas parameter testing unit to measure the concentration of dissolvable gas, so that the calculation of the emission amount is more comprehensive and accurate.

The application discloses a kind of high-pressure fuel filter prediction model construction method and flow prediction method, including two prediction models, method specifically includes: using computational fluid dynamics method carries out fluid dynamics simulation calculation to high-pressure fuel filter, constructs working condition sample data set;The size of filter hole, quantity, filter working pressure, fuel viscosity and filter pressure drop are used as input variable, and filter flow is used as output variable, two new high-pressure filter general nonlinear flow prediction models are established using artificial neural network and regression prediction method respectively, the flow characteristics of different models of filter in working interval can be accurately predicted using the neural network prediction method proposed in the application at any working condition point, and the error is low;The flow of different models of filter under different conditions can be quickly and accurately obtained, the accuracy meets the engineering needs, while greatly shortening the experimental time and calculation time, saving design cost.

The invention provides a method for calculating the load of an aircraft fastener, which comprises the following steps of: calculating the axial rigidity, the shearing rigidity, the torsional rigidity and the bending rigidity of the fastener according to the effective length, the diameter and the material of the fastener; according to the coordinate value of the fastener and the coordinate value of the load action point, a fastener partial load finite element model is established by adopting finite element software, and the fastener partial load finite element model is endowed with fastener attributes; according to the boundary condition and the load working condition, calculating and extracting a fastener load; pulling force or pressure and shearing force borne by all the fasteners are settled, and the pulling force or pressure and shearing force borne by the fasteners are integrated, namely the load borne by the fasteners after load division. The problems that an existing load calculation mode for the fastener is complex in calculation step and large in calculation amount are solved.

The application provides a kind of ionic liquid electric spray micro force calculation method, device and electronic equipment, it is related to data processing field, the method is carried out original molecular dynamics simulation in the negative gradient calculation of position to atomic potential energy and obtains the force model, the micro force decoupling of ionic liquid electric spray under molecular dynamics simulation is executed;Based on the micro force model, the molecular dynamics trajectory data is recalculated by modifying the molecular dynamics simulation code parameters, the pre-data of different micro forces is obtained, and the atomic force calculation result is output based on the pre-data of different micro forces;The atomic force calculation result corresponding to the steady state part of system is calculated by time and space average, and the spatial distribution calculation result of micro force and electric field is obtained;After a spatially uniform distribution of constant electric field is applied to the system, the first external electric field received by the charged atom is calculated using the above scheme, and the applied electric field and the calculated electric field are consistent, which verifies that the scheme is executed without error.

The application belongs to new energy and energy-saving technology, and specifically discloses a temporary building air-conditioning heating operation optimization method, device, equipment and medium; the temporary building thermodynamic model is built based on the building structure of the temporary building and the heat transfer principle, and the heat dissipation of the temporary building can be simply calculated through the model. By introducing the environmental factor, the heating model of the air conditioner is further optimized, and the heating effect of the air conditioner is more accurately calculated. Finally, taking the power consumption of the temporary building as the optimization target, a temporary building air-conditioning operation optimization model is constructed, the model is solved, and the curve of the number of air conditioners started in the temporary building changing with temperature is obtained. According to the outdoor temperature and the curve, the start-stop state of the indoor air conditioner is adjusted, so that the energy saving and environmental protection are realized while the heat load demand is met.

Embodiments of the present application relate to the technical field of image processing, and particularly relate to a contour fusion method, an electronic device and a storage medium. Embodiments of the present application determine the parent-child relationship between multiple contours, directionally constrain the contour points of the parent contour and the child contour, and determine the fusion direction, thereby fusing the nested multiple contours describing the same target region into a complete contour, eliminating the understanding ambiguity of the target region caused by the nested labeling of multiple contours, avoiding the misrecognition of the same defect region as multiple independent target regions by the segmentation network, improving the accuracy of the training data labeling, making the loss value calculation in the supervised training process more accurate, and significantly improving the convergence effect, generalization ability, and detection precision and robustness of the network model on tin hole defects.

This invention relates to a method, system, and medium for measuring the spatial parameters of a monocular target object based on a 2D camera. The method includes: acquiring a calibration board image and an original distorted image captured by the 2D camera; calibrating the calibration board image using a calibration algorithm to obtain calibration parameters; correcting the original distorted image using the calibration parameters to obtain a corrected image; performing target detection; and outputting the external contour and target contour feature points of the target object; classifying the target contour feature points into upper boundary feature points and lower boundary feature points; calculating the relative distance between the target object and the 2D camera based on the lower boundary feature points and the calibration parameters; and performing curve fitting on the upper and lower boundary feature points and the lower boundary feature points, respectively, and calculating the actual height of the target object based on the calibration parameters. Compared with existing technologies, this invention has advantages such as improved measurement accuracy and adaptability to complex boundary targets.

The application discloses a kind of insulator hanging direction judgment method and system in strain insulator string, equipment, it is related to power transmission engineering technical field, it includes according to line parameter data to judge the control operating condition of overhead line;Calculate the hanging point tension of considering string weight under corresponding control operating condition;The hanging point tension of considering string weight is judged, if hanging point tension does not comply with preset requirement, then relax the safety factor of overhead line, until hanging point tension complies with preset requirement, then calculate the inclination angle of midpoint of strain insulator string considering string weight under average temperature operating condition;The hanging direction of insulator is judged according to the inclination angle of midpoint of strain insulator string considering string weight under average temperature operating condition.The application can consider the influence of strain string unit load on sag and tension, calculate the tension of overhead line under non-uniform load, and judge the hanging direction of insulator in strain insulator string, to achieve more accurate calculation, ensure the accuracy and safety of design.

The application discloses a kind of weak steady-state energy conservation's coal-fired boiler calorific value correction method and device, the method includes the following steps: extracting weak steady-state parameter main parameter from the real-time data of unit operation, each main parameter is filtered in time detection window and weak steady-state condition is judged, when all main parameters meet weak steady-state judgment condition during detection, the mean value of energy conservation parameter under the corresponding detection number is output;Using the mean value of energy conservation parameter carries out boiler heat balance calculation, obtains the actual fuel heat value corresponding to current unit load;Actual fuel heat value Q net.ar The ratio COR of the original design fuel heat value Q design Of unit is used as coal-fired boiler calorific value correction amount, and the fuel quantity of unit is adjusted by coal-fired boiler calorific value correction amount;The application has the advantages that: avoid system repeated oscillation, improve calorific value correction precision.

This invention discloses a multifunctional laser cutting and engraving machine, belonging to the field of laser processing technology. The machine includes a main body, a three-axis motion mechanism, a controller, and a mounting platform detachably fitted with a CO2 laser engraving head and a fiber laser cutting head. The controller operates a multifunctional laser cutting and engraving system, including modules for multiphysics coupling calculation, Z-axis dynamic compensation, power adaptive correction, and switching timing control. This system can acquire data such as the series cooling temperature difference and the torsion angle of the dual-head asymmetric load to construct an interference model; dynamically compensate for the Z-axis focus based on dust shading rate and adaptively correct the effective output power; and calculate the optimal response delay time for mode switching based on air pressure and motion impact. This invention achieves intelligent switching between cutting and engraving within the same axis system, significantly improving the dual-head processing accuracy, power stability, and system response efficiency. It also includes a collection hopper for centralized treatment of waste and dust.

The invention discloses an optimal read voltage determination method of a storage device, an electronic device and a storage medium. The method for determining the optimal read voltage of the storage device comprises the following steps: acquiring the unit distribution number of the storage device in different voltage intervals; in response to the fact that the target extreme value of the multiple unit distribution numbers is located at the preset position, the anchor point position is determined based on the change rule of the multiple unit distribution numbers; and based on the anchor point position offset preset distance, determining the position of the optimal read voltage, and obtaining the optimal read voltage. According to the scheme, the application range of optimal reading voltage calculation can be expanded, the accuracy of the optimal reading voltage is improved, the error bit number is reduced, and the probability of successful data reading is improved.

The application discloses a method for predicting rectangular narrow-gap re-submerged liquid droplet entrainment behavior of a plate-shaped element, which comprises the following steps: in an offline stage, constructing and initializing a BP neural network, training and optimizing weight values and threshold values by taking experimental boundary conditions as input variables and liquid entrainment rate as an output variable, and predicting in an online stage. The application can rapidly and accurately calculate the liquid entrainment rate value suitable for the re-submerged working condition of the bottom of the plate-shaped element by training the input-output relationship through a large amount of data by using the artificial neural network prediction method.

The present invention provides a method, system, and related apparatus for evaluating the energy efficiency of photovoltaic modules in mountainous areas based on spatiotemporal heterogeneous conditions, comprising the following steps: Step 1, calculating the module power generation efficiency coefficient and the string power generation corresponding to a single inverter due to the consistency factor of photovoltaic string module installation; Step 2, obtaining the maximum effective power generation per unit installed capacity and the second-level active power of the string corresponding to the maximum power generation; Step 3, obtaining the actual power generation of the string corresponding to a single inverter for energy efficiency evaluation; Step 4, calculating the theoretical power generation of the string for energy efficiency evaluation; Step 5, calculating the ratio between the actual power generation of the string for energy efficiency evaluation and the theoretical power generation of the string for energy efficiency evaluation, and using it as the module energy efficiency evaluation index; The present invention effectively solves the problems of inconsistent module installation and uneven spatial distribution of irradiance caused by mountainous terrain, and significantly improves the accuracy and reliability of module energy efficiency evaluation.

The application discloses a kind of automobile wire harness outer diameter calculation method, system, equipment and medium, it is related to automobile electrical design field, the method includes: obtaining component pin information;Component pin information includes the wire diameter of each wire in wire harness, wire type and the number of each wire diameter wire;According to the wire diameter and wire type of each wire, the maximum outer diameter of each wire is determined respectively;According to the maximum outer diameter of each wire and the number of each wire diameter wire, the initial wire harness outer diameter is calculated;Determine the outermost wire harness protection material and the outermost wire harness protection mode;Wire harness protection material includes: adhesive tape and tubular object;Wire harness protection mode includes: full winding, point winding and flower winding;According to the outermost wire harness protection material, the outermost wire harness protection mode and the initial wire harness outer diameter, the final wire harness outer diameter is calculated.The application can quickly and accurately calculate the outer diameter size of low-voltage wire harness, thereby improving the 3D design efficiency of low-voltage wire harness, and improving the accuracy of low-voltage wire harness 3D design.

This invention discloses a GIS-based risk management system and method for pollutant migration in mining area watersheds, relating to the technical field of simulating pollutant migration patterns. It includes a 3D GIS functional module, a hydrodynamic-water quality model coupling module, and a mining watershed pollution risk management module. Based on watershed hydrology theory and pollutant migration and diffusion mechanisms, it fully considers the migration of pollutants in the storage area after rainfall via surface microrunoff. By studying the formation patterns of microrunoff, it simulates the watershed migration process of pollutants in the mining area under different rainfall intensities, thereby more accurately calculating pollutant migration and diffusion fluxes and managing the risk of pollutant migration in the watershed. Based on historical and real-time data and models, it uses a 3D model to display the spatial distribution patterns and development trends of pollutants, achieving accurate pollutant identification and source tracing. It can simulate pollution control measures in mining area watersheds, predict development trends, and provide early warnings for pollution events.

The invention relates to the technical field of logging, in particular to a method for calculating formation pressure while drilling through a corrected dc index model, terminal equipment and a storage medium, and the method comprises the four steps of formation pressure or formation pressure coefficient modeling, target well formation pressure coefficient back calculation, dc index correction calculation and formation pressure calculation. The method comprises the following steps: calculating formation pressure by adopting logging information before drilling, establishing a seismic formation pressure inversion model, calculating a dc correction index by adopting inversion during drilling, and establishing a relation model with the formation pressure according to an Eaton model; by comprehensively utilizing earthquake, logging and formation pressure coefficient data, a formation pressure model conforming to a regional formation pressure distribution rule is established, and the formation pressure of a target well is calculated more accurately by correcting a d index. According to the method, the prediction precision of the formation pressure is improved, and an important reference basis is provided for drilling engineering.

The invention relates to the technical field of power system management, in particular to a virtual power plant scheduling method and system based on regional power utilization activity prediction. The method comprises the following steps: collecting user load data and geographic information data of a target area; dividing users into different power utilization activity types based on the geographic information data and the user load data; for each power utilization activity type, utilizing a preset machine learning sub-model to predict a power change curve of the power utilization activity of the type in a future time period; and solving an optimal control sequence of a future time period based on a preset optimization target by using the power utilization activity prediction result, and generating a scheduling instruction for distributed energy, an energy storage system or a controllable load in the virtual power plant. According to the method, load prediction is converted into activity prediction, so that the scheduling decision of the virtual power plant is not based on a fuzzy aggregation value any more, but based on a clear portrait of a future power consumption behavior, and the scheduling precision and stability of the virtual power plant are improved.

This invention belongs to the field of lighting fixture positioning, and provides a lighting fixture positioning method, device, and lighting fixture. The method includes: obtaining a first original rotation angle of a first pulley and a second original rotation angle of a differential pulley; processing the second original rotation angle using a dynamic error suppression algorithm to obtain an optimized rotation angle and outputting it; calculating the absolute rotation angle of a swaying component based on the first original rotation angle and the optimized rotation angle, and determining the current position of the swaying component based on the absolute rotation angle; and updating system parameters through intelligent self-learning calibration when preset conditions are met, and updating the current position to the historical learning position list, wherein the system parameters include at least the reset reading difference. In this embodiment of the invention, processing the second original rotation angle using a dynamic error suppression algorithm can effectively suppress random errors, and updating system parameters through intelligent self-learning calibration can automatically adapt to environmental changes and device aging, ensuring the long-term operational accuracy of the system.

The invention discloses a vehicle transportation carbon emission analysis method and device, and the method comprises the steps: obtaining an operation condition variable and an environment variable according to a vehicle pollutant emission standard and a vehicle type; determining a transportation carbon footprint factor of each vehicle type according to the operation condition variable and the vehicle type; establishing a dynamic correction coefficient model according to the operation condition variable and the environment variable; and based on activity level data in a transportation stage, the dynamic correction coefficient model and the transportation carbon footprint factor of each vehicle type, carrying out carbon emission analysis in an operation stage to obtain the total carbon emission of each vehicle type in the transportation stage and the carbon emission of a unit product in the transportation stage. According to the method, dynamic calculation and accurate accounting of the carbon emission of different vehicle types in the transportation stage under different operation working conditions and environment conditions can be realized, so that the real-time performance, the accuracy and the applicability of carbon emission analysis are improved.

The invention discloses an earthquake landslide large deformation whole process simulation method based on a grid isolation technology, and relates to the technical field of geotechnical engineering. According to the method, a separated background grid containing a safety isolation belt and a multi-medium model are constructed based on a second-order convective particle domain interpolation material point method, and dynamic analysis is performed on seismic landslide by using a strain-driven soft and hard coupling constitutive mechanism, so that flexible input of seismic waves at the isolation belt and drifting prevention of a substrate are realized; and the complete evolution process of the landslide from undrained shear crack initiation to large-deformation friction accumulation can be accurately simulated. According to the method, wave reflection interference of a dynamic boundary and numerical drift of long-lasting integral are effectively eliminated, and real physical reproduction of the whole process of seismic landslide from crack initiation to friction accumulation is realized; therefore, calculation of large deformation and permanent displacement of the side slope under the earthquake action is more accurate and stable, and a foundation is laid for prediction and evaluation of the whole evolution process of landslide disasters.

The application discloses a kind of square battery roll core tab die-cutting parameter calculation method, belong to new energy battery technical field.The method includes parameter determination, first circle length calculation, circle length difference calculation, each circle length calculation, correction and finishing adjustment steps.First, according to the key parameters of cell design scheme are determined, then according to the winding direction and the position of tab calculates the first circle of tab die-cutting length, then calculate the length difference of each circle of tab, and then obtain the length of each circle of tab die-cutting theory, by multiplying correction coefficient, combined with the total design length of tab adjustment last circle length, obtain the final tab die-cutting parameter.The application is based on winding simulation and mathematical theory calculation, combined with practice correction coefficient, can quickly and accurately calculate the tab die-cutting parameter, adapt to different model square battery process parameter change, improve research and development efficiency and production quality, with wide application prospect.

The application relates to the technical field of battery management systems, and provides a battery pack copper bar equivalent resistance updating method, which comprises the following steps: collecting the voltage of adjacent battery cells of a battery pack when the current is 0 for a certain time, and simultaneously calculating the voltage difference; collecting the voltage of adjacent battery cells of the battery pack under a certain current for a certain time, and simultaneously calculating the voltage difference; calculating the copper bar equivalent internal resistance according to the voltage difference and the sampling current; judging whether the difference between the obtained equivalent internal resistance and the copper bar equivalent internal resistance to be updated is less than a preset threshold value; if yes, updating the copper bar equivalent internal resistance; and if not, not operating. In the whole life cycle of the battery system, the algorithm periodically calculates and updates the copper bar equivalent resistance according to the working conditions, so that the influence of copper bar resistance value changes caused by aging and other factors is eliminated, the effectiveness and accuracy of the copper bar resistance value calculation are ensured, and the accuracy of the cross-copper-bar battery cell voltage sampling is ensured.

The application discloses a cable life prediction method based on an improved electromagnetic-thermal field coupling model, and comprises the following steps: firstly, a temperature coefficient and a proportional coefficient are used to respectively establish an insulation material thermal conductivity coefficient and temperature relationship and a convection heat transfer coefficient and temperature relationship, and the two relationships are used together with a conductor resistivity and temperature relationship as an electromagnetic-thermal field coupling relationship, thereby forming an improved electromagnetic-thermal field coupling model; then, a chaotic grey wolf optimization algorithm is used to identify the optimal temperature coefficient and the proportional coefficient of the insulation material in the improved electromagnetic-thermal field coupling model, and on this basis, the conductor temperature is calculated; finally, a multivariate linear regression is used to establish a conductor temperature analytical model, and an Arrhenius model is used to establish a cable life analytical model. The application solves the problem of large error of a traditional electromagnetic-thermal field coupling calculation method under a high temperature operation condition of a cable, and realizes online prediction of the cable life.

This application proposes a configuration system and method for distributed power locomotives. The system includes an operation and display module for sending vehicle data of the distributed power locomotives to a central control module; sensors for measuring the weight of the dump trucks and the real-time tilt angle of the distributed power locomotives; a data acquisition module for collecting the weight and real-time tilt angle of the dump trucks; and a central control module for determining the required number of powered dump trucks and the required number of drive mechanisms based on the vehicle data, the weight of the dump trucks, and the real-time tilt angle, and configuring the distributed power locomotives based on the number of powered dump trucks and the number of drive mechanisms. The technical solution proposed in this application can quickly and accurately calculate the required number of powered dump trucks and the required number of drive mechanisms under the current construction environment, and can also flexibly group them based on the required number.

The invention relates to a charge capacity calculation device and method for an energy storage system. A method of calculating a charge capacity of an energy storage system according to one embodiment of the present invention. The method includes: a current application step of applying a predetermined current having a constant value to the energy storage system; a first voltage measurement step of measuring a voltage of the energy storage system while a predetermined current having a constant value is applied to the energy storage system; a second voltage measurement step of measuring a voltage of the energy storage system after blocking a predetermined current having a constant value applied to the energy storage system; and a resistance (R) and capacitance (C) calculation step for calculating the resistance (R) and capacitance (C) of the energy storage system on the basis of the voltage of the energy storage system measured in the first voltage measurement step, the voltage of the energy storage system measured in the second voltage measurement step, and a predetermined current having a constant value.

The present application relates to a kind of block bottom water buried hill reservoir original oil-water interface determination method, belong to the technical field of reservoir development.In single stratum trap, the favorable position of structure is selected to implement test production well, and the preliminary original oil-water interface h i Of stratum trap is obtained by geological information, then the test production well is carried out test production by selecting perforation horizon, when the comprehensive water content of test production well evaluation period is not more than 10%, preliminary original oil-water interface h i Equal to final original oil-water interface h u When the comprehensive water content of test production well evaluation period is more than 10%, preliminary original oil-water interface is reviewed and corrected, so that final original oil-water interface is accurately calculated.The present application comprehensively considers the trap type and storage and seepage characteristics of block bottom water buried hill reservoir, and accurately calculates the original oil-water interface of block bottom water buried hill reservoir with layered structure by using multiple technical means such as comprehensive geochemical logging, well logging, gas logging, test production evaluation, etc., to provide basis for reserve evaluation and development deployment.

A space contour computing device and method. The device projects a plurality of three-dimensional map points to a projection plane to generate a plurality of projected points projected on the projection plane. The device computes an indoor plane contour based on the plurality of projected points. The device generates a plurality of fitting planes parallel to a normal vector and a gravity vector based on the plurality of three-dimensional map points. The device determines a floor fitting plane and a ceiling fitting plane from the plurality of fitting planes. The device generates a space contour corresponding to a physical indoor space based on the indoor plane contour, the floor fitting plane and the ceiling fitting plane. The space contour computing technique provided by the present invention can improve the correctness of three-dimensional map points.

The application relates to the technical field of intelligent transportation and carbon governance, in particular to a passenger car carbon emission monitoring and regulation system and method based on multi-source spatio-temporal data. The application solves the problem of scattered and inconsistent data by preprocessing and uniformly mapping multi-source spatio-temporal data. A three-dimensional carbon emission calculation model of vehicle-space unit-time period is constructed to realize accurate calculation of single-trip carbon emission of a single vehicle and positioning of high-carbon emission hotspots. A clustering algorithm is used to complete differentiated division of user groups. A dynamic early warning threshold is generated based on a warning threshold prediction model, regional carbon emission targets and historical data to reduce false positives and false negatives. A warning type-policy tool-adaptation object mapping rule library is established, and a regulation strategy is generated by combining early warning signals and real-time data to realize automatic and accurate generation of regulation strategies from problem identification. The model parameter, early warning threshold and mapping rule are optimized by using policy implementation effect data to form a monitoring, early warning, regulation, optimization closed-loop management and realize accurate regulation.

This invention discloses a core holder and experimental method for thermal stress fracturing experiments, comprising: an insulated pipe kit having a through cavity; a heating device at one end of the insulated pipe kit, and an insulation layer in the area outside the heating device; a first temperature sensor on the upper side of the area opposite the insulation layer, and a transparent glass-encased steel container on the lower side of the area opposite the insulation layer; a second temperature sensor on the heating device; a clamping device for clamping the insulated pipe kit; a piston kit disposed on the clamping device for introducing gas or liquid into the cavity of the insulated pipe kit; and a device for clamping the experimental core placed in the cavity of the insulated pipe kit. This experimental apparatus, in addition to thermal stress fracturing displacement experiments, can also meet the equipment requirements of conventional body experiments, exhibiting strong functionality.