8 results about "Correlation equation" patented technology

The invention discloses a mine working face water inflow prediction method based on mining water yield comparison. The method comprises the steps that 1, the development height of a water flowing fissure zone is calculated; 2, counting the sandstone equivalent thickness, the sand-to-ground ratio, the core recovery rate, the brittle-plastic rock thickness ratio, the unit water inflow and the permeability coefficient in the development height of the water flowing fractured zone as multivariate data; 3, determining the comprehensive weight of each evaluation index in the multivariate data; 4, drawing a contour map of mining area mining water yield indexes; 5, giving a fitting equation of the water inflow of the working face and the water yield index, and predicting the water inflow of the working face; according to the method, the contour map of the mining water yield index of the mining area is formed by coupling all the parameters, the correlation equation of the mining water yield index and the water inflow is constructed, the water inflow of the working face to be mined can be predicted based on the known mining water yield index through the equation, and the method is easy to operate and high in practicability. And the method is of great significance to the construction of mine water disaster prevention and treatment and mine water treatment facilities.

This invention discloses a method for visually measuring the wind speed of an airflow field. The measurement method includes six steps: placing a constant-power electric heating plate with a temperature higher than that of the airflow in the path of the airflow to be measured; using a thermal imager to photograph the airflow in front of the constant-power electric heating plate to obtain a thermal image of the temperature distribution of the constant-power electric heating plate during heat exchange; exporting the temperature values ​​from the image; using a hot-wire anemometer to detect the air speed at a specific point; fitting a correlation equation using the temperature and velocity values ​​at the specific point; exporting the temperature and coordinate values ​​of N or all pixels in the temperature distribution image of the electric heating plate, and substituting them into the correlation equation to obtain the velocity values ​​at each point in the airflow field. This allows for a direct visualization of the velocity distribution and range of the measured airflow field. This invention can accurately acquire the velocity field of the airflow, and the method is applicable to the velocity field detection of various complex airflows, and can accurately determine the diffusion range of a gas jet.

The present application relates to the technical field of rail damage detection, and particularly relates to a rail damage detection qualitative identification and quantitative reconstruction method. The present application comprises a vehicle body, a handrail is fixed on one side of the vehicle body, two parallel aluminum alloy square tubes are arranged in the vehicle body, and a running mechanism is arranged at both ends of the aluminum alloy square tube. The present application adopts automatic force detachable design, is more labor-saving to operate, and realizes rapid qualitative identification through a plurality of types of rail damage databases. The image gray value and the wear depth value are combined to establish a correlation equation, high-precision quantitative reconstruction is realized, the rail damage wear characteristics are more accurately restored, the rail damage image gray processing, histogram equalization and FPN structure are adopted to enhance the image features, improve the detection accuracy and range, the correlation model of the rail damage image gray and the wear depth is fitted through the neural network, the damage image is mapped to a three-dimensional model, and strong support is provided for subsequent evaluation and polishing guidance.

Method for contextualizing cartographic data. A method for contextualizing cartographic data implemented by a moving vehicle comprising at least one sensor and a navigation system, the navigation system being configured to acquire cartographic information with its associated cartographic positions, the method comprising: - a plurality of acquisitions by the navigation system, at different acquisition times, of a cartographic data point from among the cartographic information, - The determination, for each acquired cartographic data point, of a quantity representative of the cartographic data point at a vehicle location substantially equal to the cartographic position associated with said acquired cartographic data point, - The determination of a polynomial correlation equation between the cartographic data point and the quantity representative of the cartographic data point.- Automatic contextualization of map data at each acquisition by the navigation system based on the determined correlation equation. Figure for the abbreviation: Fig. 3,

The invention relates to the technical field of constant-temperature room temperature and pressure control, in particular to a gas chromatograph constant-temperature room temperature and pressure cooperative control system and method. A control system preloads a pressure-temperature dynamic coupling model and a chromatographic peak half-peak width correlation equation in a control layer, temperature change and pressure change of a constant-temperature chamber are divided into an active regulating variable and a passive influence variable, and decoupling analysis of temperature and pressure is achieved; the sensor layer monitors the temperature and the pressure in the constant-temperature chamber in real time and provides accurate monitoring data for the control layer, the control layer outputs an adjusting instruction according to a calculation result of a half-peak width associated equation, and the execution layer enables the control of the temperature and the pressure to be more targeted through linkage adjustment of a heating module and an air supply / exhaust valve; the problem that temperature and pressure interfere with each other in traditional independent control is reduced, and the control precision and the response speed of environmental parameters of the thermostatic chamber are improved.

This invention relates to a method for fitting transmission line loss using linear regression, comprising the following steps: obtaining loss factors corresponding to multiple discrete frequency points based on the characteristic data of the substrate used in the transmission line; establishing a correlation equation between the loss factor and frequency using a linear regression algorithm, and configuring the correlation equation as a dynamic loss factor parameter in the transmission line simulation model; performing transmission line loss simulation through the configured simulation model to achieve full-band fitting of transmission line loss. This invention utilizes the dynamic correlation equation between the loss factor and frequency to avoid simulation deviations caused by fixed value settings, significantly improving the reliability of transmission line loss simulation results and achieving a high degree of consistency between simulated data and measured transmission line loss data within the target frequency band. This invention can construct dynamic loss factor parameters based solely on official substrate characteristic data and a linear regression algorithm, with a simple operation process, low implementation cost, and rapid application by circuit designers.

This method for measuring the flow rate of gas-liquid two-phase flow based on pipe bend and acoustic emission technology belongs to the field of gas-liquid two-phase flow measurement. The method includes measuring the average liquid holdup of the two-phase flow within the pipe. H L Calculate the instantaneous velocity of the gas and liquid phases at the 45° section of the bend in the pipe. Vc ; Identify the gas-liquid two-phase flow pattern within the pipeline; Vc , H L Apparent fluid velocity V SL and apparent gas velocity V SG As variables, dimensional analysis is used to propose different flow patterns. Vc , H L and V SL , V SG The correlation formula; calculate the effective voltage value of the acoustic emission signal. RMS ,Establish RMS and V SL and V SG The correlation equation; the parameters in the fitted correlation equation; the newly acquired data as input to the fitted correlation equation. Vc , H L RMS, output V SL , V SG This allows for the measurement of the flow rate of the gas-liquid two-phase flow. Compared with the single-phase metering method commonly used in the oil and gas industry after separation, this invention has advantages such as simple structure, low measurement cost, real-time measurement capability, and non-invasiveness.

The invention provides a nacelle response calculation method and device for a multi-propeller tilting aircraft. The method comprises the following steps: solving wing modal information containing nacelles of a multi-propeller / wing coupling system based on a distributed multi-propeller / wing aeroelastic coupling kinetic equation; based on a modal superposition method, establishing a correlation equation of profile load and wing response in combination with wing modal information; solving an influence factor of each order modal on the wing response, and obtaining the wing response based on the influence factor and the corresponding order modal; solving nacelle waving and shimmy responses based on a modal superposition method, and superposing wing responses to obtain a response of the nacelle relative to a fuselage coordinate system; according to the invention, the difficulty of nacelle response monitoring is reduced, and the calculation efficiency is improved.