71results about How to "Simplified calculation model" patented technology

The invention discloses a construction method of a partial discharge diagnosis system of a switch cabinet based on multi-information fusion. The method mainly comprises the steps of: S1, establishinga test platform of a switch cabinet, and simulating typical defects of metal protrusions, air gaps, metal suspensions and insulated internal discharge of the switch cabinet by employing an artificialdefect simulation technology; S2, performing comprehensive detection of the typical defects of the switch cabinet by employing the transient ground voltage method, the ultrasonic method and the ultra-high frequency method to obtain the characteristics of the partial discharge signals; S3, after feature extraction processing of the feature information, transmitting the feature information to the elementary probability distribution BPA of a DS fusion block for finishing; and S4, employing the DS evidence theory to perform fusion of the finished information to obtain an identification system. Through the extraction of the multi-information features, the principal component selection and the defect identification, the feature set is optimized to simplify the calculation model; through the evidence theory, the multi-detection method information and the multi-identification system information are fused to establish a multi-source information comprehensive identification system so as to improve the measurement precision.

The invention discloses an apparatus and method for measuring the line source flow of the soil soaking-in function. The apparatus comprises a constant water-providing tank, a water-distributing device, a soil groove, a rule and an image device. The method comprises the following steps: 1) sieving the air-dry soil and measuring the initial water ratio of the soil sample; 2) putting the soil sample in the soil groove; 3) adjusting the soil groove to the given height altitude; 4) putting the water distributing device on the soil surface of the soil groove to distribute the water; 5) recording the earth advancing area at different times by the image device; 6) recording the providing water and the soil dewing area image every section of time; 7) obtaining the corresponding dewing area by computing the image sheet; 8) obtaining the soil soaking-in ratio in different times by the computing formula.

The invention discloses a method for testing an interfacial heat transfer coefficient during rapid solidification. The interfacial heat transfer coefficient is obtained by immersing a heat flow measurement probe in a melting furnace and transmitting the measured data to a signal data acquisition system and a computer, wherein the measurement probe comprises two symmetrically designed copper plates (sheets) with the same size; two thermocouples with equal diameter are welded to the inner sides of the two copper plates; the two copper plates are closely fixed with screws to ensure that the gap between the two is less than 0.5mm; and the two thermocouples measure the temperature of two points on the inner walls of the copper plates. In the method and the device, because the size of the copper plate in one direction is far less than the sizes in another two directions, the heat transfer can be considered as one-dimensional heat transfer. The temperature of the inner wall of the copper plate is measured by the thermocouple and then the heat flow of the interface is calculated. And the interfacial heat transfer coefficient between a base and molten steel is further calculated through the interfacial heat flow.

The invention discloses a GNSS point positioning coordinate correction method based on CORS. A CORS system acquires coordinates of a reference station and observation values, and a coordinate correction value is calculated based on the initial outline coordinates obtained by a GNSS terminal in a point positioning manner and a satellite list used during the positioning; and the coordinate correction value is applied to the outline coordinates and precision approximate to the pseudo range difference can be obtained. The original observation values of the GNSS terminal are not needed, and the problem of inconsistent signs of conventional coordinate difference technology is solved, so that the application prospect is wide.

The invention discloses a simplified design method for a continuously-welded rail of a ballastless track of an ultra-large bridge of a railway. The method comprises the steps of: S1, utilizing ANSYS software to perform analog simulation on the continuously-welded rail structure on the ultra-large bridge; S2, establishing a horizontal and vertical space coupling static model for the continuously-welded rail of the ballastless track of the ultra-large bridge of the railway, wherein modeling objects include a steel rail, a fastener, a track board, an elastic rubber pad layer, a limiting boss, a bridge and a pier; and S3, performing static analysis on the coupling static model. According to the technical scheme, on the basis of the simplified design method, static force of a continuously-welded rail-ballastless track-ultra-large bridge system of the railway can be accurately and effectively analyzed, relation of interaction between girders and rails is fully considered, modeling of the track structure is finished according to an actual state as far as possible, a computing model is simplified on the premise of ensuring the model to be fine, complete and accurate, and remarkable improvements are achieved in design in comparison with a conventional modeling method.

The invention discloses a method for setting the reclosing time on the basis of secondary arc currents and recovery voltages. The method includes judging types of single-phase earth faults when the single-phase earth faults of double-circuit lines of the same towers occur; computing numerical values of the secondary arc currents and the recovery voltages by the aid of the types of the single-phase earth faults, selecting the appropriate reclosing time and switching the reclosing time of the double-circuit lines of the same towers to the reclosing time corresponding to the current fault types. The secondary arc currents and the recovery voltages correspond to the current fault types. The method has the advantages that the corresponding reclosing time can be selected according to the types of the specific single-phase earth faults of the power transmission lines and can be changed along with running conditions of the power transmission lines instead of being fixed, accordingly, the optimal reclosing time can be selected when the running conditions of the ultrahigh-voltage double-circuit lines of the same towers are different, the problem of reclosing failures during temporary faults can be effectively solved, and the single-phase automatic reclosing success rate can be increased.

The invention relates to a method for quantitatively evaluating orientation degree of short fiber reinforced composite fibers, which is characterized by selecting and determining a sectioning surface and sectioning a composite sample; acquiring a micrograph via an optical microscope or a scanning electron microscope; repainting the elliptic fiber section in the micrograph in graphic image software; extracting the lengths of long axis and short axis and an angle between the elliptic long axis and a coordinate axis in the repainted picture; calculating the direction vectors of the fibers corresponding to the ellipses according to the extracted parameters of the elliptic section; and calculating the parameters of the orientation degree of the composite along a specific direction. According to the method, the proper sectioning surface is selected so as to eliminate the calculation errors caused by condition that the same elliptic section corresponds to two fiber directions. In addition, a calculated mode given by the method considers the probability of sectioning the fibers, and the calculating result is more accurate in comparison with the calculated mode which does not consider the probability of sectioning the fibers.

Said invention refers to concrete gaseous permeability coefficient uniaxial compressive stress tester and testing method belonging to concrete material viability detection technique field. It contains dying, dying sample room, supporting frame, lifting jack, pressurizing plate, compressed gas tank, and pressure gauge etc, wherein dying consisting of dying cover board and dying bottom case, dying sample room located in dying bottom case, dying cover board and dying bottom case respectively set with outgoing gas chamber, intake chamber in turn connected with inlet valve, compressed gas, and pressure gauge, lifting jack and pressurizing respectively located at two ends of test sample, one side of dying bottom case set leakage check groove. In testing, tested sample is located in dying sample room, pressing in wedge, screwing dying, checking leak tightness, starting up lifting jack, applying compressive stress in test sample, opening compressed gas tank valve, keeping tested sample equilibration time being 10-20 minute, each tested sample repeating testing gas permeation time by more than 3-5 times, changing test pressure and repeat testing, to obtain tested sample permeability coefficient average value, taking 3-5 tested sample permeability coefficient average value as test value of said group tested sample. Said invention has easy and simple to handle, reliable test result, assembly type unit, and convenient for carrying.

The invention relates to a power transmission line sag measurement method based on infrared camera image processing. The method comprises the following steps of calibrating a measurement site and an infrared camera; through the infrared camera, acquiring image information near a sag observation point, processing an image and extracting a pixel coordinate of the observation point; acquiring processed image data and calculating so as to obtain a sag of a power transmission line; determining whether the sag of the power transmission line is in a safe range, if the sag of the power transmission line is not in the safe range, sending information to a monitoring terminal, receiving the information and then outputting alarm information by the monitoring terminal; and if the sag of the power transmission line is in the safe range, returning to the step that the infrared camera acquires the image information near the sag observation point. By using the method of the invention, a calculating model is concise and all-weather real-time on-line monitoring can be performed on the power transmission line sag. During establishing a system, less equipment is required, performance is reliable, the structure is simple and cost is low.

The invention discloses a differential type laminar flow rate measuring method and device and belongs to the technical field of flow rate measurement. The measuring device is provided with a measuringpipeline; the measuring pipeline comprises a first laminar flow element, a second laminar flow element, a first differential pressure sensor and a second differential pressure sensor; the length of the first laminar flow element is different from the length of the second laminar flow element; the first differential pressure sensor measures the differential pressure deltaP1 of two sides of the first laminar flow element; the second differential pressure sensor measures the differential pressure deltaP2 of two sides of the second laminar flow element; the first laminar flow element and the second laminar flow element comprise the same number of capillary tubes of the same diameters; the length of the capillary tubes in the first laminar flow element is L1, and the length of the capillary tubes in the second laminar flow element is L2; if L2 is larger than L1, deltaP2 is larger than deltaP1, and a differential pressure difference value deltadeltaP can be obtained according to an equationthat deltadeltaP=deltaP2-deltaP1; if L2 is smaller than L1, deltaP2 is smaller than deltaP1, and the differential pressure difference value deltadeltaP can be obtained according to an equation that deltadeltaP=deltaP1-deltaP2; and the differential pressure difference value deltadeltaP is proportional to volumetric flow flowing through the measuring pipeline. With the method and device adopted, high-accuracy measurement and a larger range can be realized easily.

The invention provides a method and device for measuring rated guide vane water leakage of a water turbine. The method comprises the following steps: determining reference pressure head on the basis of pressure difference between water pressure in a water inlet pipe of the water turbine and water pressure in a tail water pipe when a flat pressing facility of the water turbine is closed; and determining the rated guide vane water leakage of the water turbine on the basis of the reference pressure head, the area of the horizontal cross section of an inclined shaft section of the water inlet pipe of the water turbine or the area of a ventilating hole of the water turbine. According to the method and device for measuring the rated guide vane water leakage of the water turbine, an algorithm is simple, calculating parameters are less, the water leakage of a gate does not need to be measured, and the testing efficiency of a testing field for the rated guide vane water leakage of the water turbine is improved effectively.

The invention discloses an online batched salmon flesh volatility salt base nitrogen detection device and method based on the spectral analysis. The detection device comprises a detection conveying belt used for continuously conveying salmon flesh, a spectrum probe erected above the detection conveying belt and used for collecting spectrum information of the salmon flesh, a host used for receiving the spectrum information from the spectrum probe and conducting comparison on the spectrum information and the preset value so as to obtain a detection result, and a sorting mechanical arm used for sorting the salmon flesh on the detection conveying belt so as to distinguish qualified products and disqualified products according to the detection result. By means of the online batched salmon flesh volatility salt base nitrogen detection device and method based on the spectral analysis, large-batch automation detection of the salmon flesh volatility salt base nitrogen can be achieved, the feature wavelength of the salmon flesh volatility salt base nitrogen can be reflected to the maximum degree through the analysis, the illumination intensity corresponding to a wavelength optical filter is collected, the volatility salt base nitrogen calculation formula is determined through a multivariate linear regression method, spectrum data collection is reduced, a calculation model is simplified, and the purpose of rapid detection is achieved.

The invention relates to a unit combination defect magnetic flux leakage signal calculating method along magnetization direction. The method comprises the following steps: S1) selecting the unit defect size according to the preset target defect size; S2) obtaining a unit defect magnetic flux leakage signal; S3) performing three-dimensional Fourier transform on the unit defect magnetic flux leakage signal to obtain a frequency domain signal after transformation; S4) performing translation transformation operation on the frequency domain signal after transformation along the magnetization direction to obtain two frequency domain signals after translation transformation; S5) performing combination operation on two frequency domain signals after translation transformation along the magnetization direction to obtain the frequency domain signal after combination; and S6) performing three dimensional fourier inversion on the frequency domain signal after combination to obtain the magnetic flux leakage signal of the target defect. According to the invention, complex calculating such as finite element is not required for the target defect for second time, and the method has the advantages of simple calculating model and fast speed.

The invention discloses a method for measuring boiler dry flue gas volume based on coal caloric values and exhaust fume oxygen amount. The exhaust fume oxygen amount can be acquired from the database of a power plant decentralized control system DCS, the coal caloric values are obtained from a power plant coal industrial analysis report, an excess air coefficient is obtained through the calculation based on the exhaust fume oxygen amount, and the CO2 theoretical maximum value is obtained through the calculation based on the coal caloric values. The content of CO2 in the dry flue gas is obtained through the calculation based on the excess air coefficient and the CO2 theoretical maximum value, and the volume and the mass of the dry flue gas are respectively obtained through the calculation based on the content of CO2 in the dry flue gas and the coal caloric values. The measuring method can effectively prevent the strict requirement that the coal component element analysis needs to be calculated based on national standard, simplifies the calculating model of the dry flue gas, and can meet the needs for the online calculation of the dry flue gas of a boiler.

The invention provides a route optimization method for an automatic mapping task of a mobile robot. The method is characterized in that through environmental data acquired by a laser radar, an ultrasonic radar, a depth camera and other equipment carried by the robot, under the control of an optimization strategy coordinating two target mechanisms, i.e., prioritized tracking of obstacle boundariesand sufficient exploration of passable areas, the longest distance from the obstacle area boundaries and the shortest distance from boundaries of the passable areas detected by the robot within each time step are respectively calculated; and the concept of mapping exploration priority is initiatively proposed, and a route optimization algorithm for the automatic mapping task of the mobile robot isestablished. The method provided by the invention has the advantages that a model is simple and efficient; and even in a complex and unknown environment, quick exploration of obstacle areas and the passable areas in the environment by the robot can be efficiently achieved.

The invention discloses a calculation method for stability control of a gravel pile and geogrid combined composite foundation. When the gravel pile and geogrid combined composite foundation conforms to an assumed deep failure mode, the calculation of the stability control of the gravel pile and geogrid combined composite foundation is based on a rigid body limit balance principle; for reinforced soil bodies between gravel piles, a reinforced soil body under an embankment coverage area is equivalent to homogeneous soil according to an area equivalent method, the area except the embankment coverage area is still a soft soil area, and the safety coefficient of the gravel pile and geogrid combined composite foundation is calculated; if the safety coefficient meets the requirements in technicalspecifications, the minimum geogrid ultimate tensile rigidity required by the safety factor is calculated, and the determined design scheme of the gravel pile and geogrid combined composite foundation is more economical and effective. The problem of stability calculation of a traditional gravel pile and geogrid combined composite foundation is solved, and meanwhile the strength parameters of gravel piles and geogrids are reasonably determined.

The invention discloses a method for analyzing influences, caused by beaded-shaped karst, on pile foundation stressed deformation. The method comprises the following steps: A, selecting finite element numerical value simulation software; B, establishing an axisymmetric two-dimensional geometric model according to on-site geological researches; C, carrying out grid division, selecting a constitutive model, and setting boundary conditions and material parameters; D, additionally arranging a contact unit between a pile foundation and a stratum; E, killing a pile foundation material unit, and simulating a stress state and settlement deformation of the stratum under the effect of gravity; F, activating the pile foundation material unit and simulating pile foundation construction; G, applying pile foundation top load and simulating the effect of external load; H, discounting an elastic modulus of fillings in a karst cave, and simulating a secondary consolidation settlement process of the soft fillings in the karst cave after disturbance; and I, obtaining stressed deformation results of the stratum and the pile foundation through a post-processing program. The method disclosed in the invention is feasible, simple and convenient to operate and efficient in calculation, has the effect of satisfying the design and construction of pile foundations in karst areas, and has great importance for the design and construction of building pile foundations in the karst areas.

The invention discloses a method for calculating scattering characteristic of a river ice infrared waveband, and belongs to the field of target and environmental infrared radiation scattering characteristic research. The problems that a scattering model has low calculation accuracy and low practicability in engineering because the fact that the river ice has the characteristics of strong directional scattering and strong scattering radiation brightness is not considered are solved. The method comprises the following steps: dividing BRDF on the surface of river ice into two parts, namely diffusion reflection BRDFdiff and specular reflection BRDFspec, and calculating the diffusion reflection BRDFdiff and the specular reflection BRDFspec separately to obtain the BRDF on the surface of the river ice; according to the BRDF on the surface of the river ice, the wavelength of incident solar radiation, the incident direction and the observation direction, calculating the radiation brightness after the river ice is scattered; and according to the radiation brightness, calculating the scattering radiation brightness after the scattering radiation brightness of the river ice is absorbed by atmosphere through the observation direction. The method is used for calculating the scattering radiation brightness of the river ice under solar radiation exposure during earth observation.

The invention provides a simplified modeling evaluation method for the harmonic power of a three-phase rectifier unit. On the basis of a built harmonic power model of a three-phase rectifier unit, a harmonic power admittance matrix corresponding to the harmonic power model is built according to the coupling relationship between the harmonic voltage and current of the rectifier unit, and the distribution of contribution of different harmonic components of the end voltage to each harmonic power is analyzed. Thus, the element areas having less contribution to harmonic power in the harmonic power admittance matrix can be eliminated, and the harmonic power admittance matrix is simplified. Then, a simplified harmonic power model of the three-phase rectifier unit is reversely derived according to the simplified harmonic power admittance matrix to calculate the harmonic power evaluation value of the three-phase rectifier unit. The calculation model of harmonic power of the three-phase rectifier unit is simplified greatly. Moreover, based on the fact that the calculated harmonic power evaluation value of the three-phase rectifier unit still has high reference reliability, effective reference information can be provided for practical work.

The invention discloses a capillary communicating tube typedifferential pressure sensor. A shell and a first elastic diaphragm and a second elastic diaphragm form a first cavity and a second cavity which are internally filled with insulating colloids, the first cavity and the second cavity communicate to each other, and a capillarycommunicating tubewith a slender capillary tube is disposed betweenthe first cavity and the second cavity. An upper resistance wireand a lower resistance wire of the same material and shape are embedded in the upper inner walland the lower inner wall of the capillary tube correspondingly, anda mercury column is arranged at the center point betweenthe upper resistance wireand the lower resistance wire in the longitudinal direction. The mercury column separates the insulating colloids on both sides, the upper resistance wire is externally connected with two binding posts correspondingly, and the lower resistance wire is externally connected with one binding post. When the ambient pressure difference ismeasured specifically and external connected pressure is applied on the first elastic diaphragm and the second elastic diaphragm, the mercury column is pushed to displace to deviate away from the center point of the resistance wires, the resistance valuebetween the binding posts of the upper resistance wire and the lower resistance wire and the resistanceof the whole resistance wires are measured at this time, the displacement of the mercury column deviating from the center point can be obtained, and then differential pressure on the two sides is derived.

The invention provides an intelligent optimization method and system for multi-robot multi-task cooperative work. The intelligent optimization method provides an intelligent optimization method for multi-robot and multi-task cooperative work by fusing the concept of a task time window. The intelligent optimization method can drive a plurality of robots to complete a plurality of tasks according to an optimal execution scheme, firstly designs a task time and motion time linear approximation method to solve the problem that the time needed by the robots to complete tasks and distances is uncertain, and improves the practicability of the method by combining the concept of a task time window. The intelligent optimization method has the advantages that the model is simple; the efficiency is high, and the multi-robot can efficiently and rapidly decide the optimal task planning scheme to complete multiple tasks in a complex environment.

The invention relates to a data processing method based on clinical test data, belongs to the technical field of clinical test evaluation, and solves the problems that the deviation caused by crowd heterogeneity is not fully eliminated and the data is not fully utilized to improve the inference precision in the prior art. The method comprises the following steps: acquiring data samples of a treatment group and a control group in a clinical test; determining a sample survival estimation model under a potential treatment result based on the data samples of the treatment group and the control group; acquiring a covariable related to a treatment effect in the sample survival estimation model, and calculating according to the sample survival estimation model to obtain potential result estimation of a survival individual under a treatment scheme and the probability that the individual is in a survival state; according to the above-mentioned potential outcome estimates of the surviving individuals under the treatment plan and the probability of the individuals being in a survival state, determining the confidence interval of the average causal effect SACE of the survival group. The confidence interval of the SACE obtained by the method can be used for judging whether a clinical test is effective or not, and the inference conclusion is accurate.

The invention discloses a method for estimating the thermal neutron fluence of a heavy water reactor. According to the method, the structural material of the core of a heavy water reactor is taken outafter neutron irradiation; then the isotope abundance of one or more elements is measured by a nuclear analyzer, because the nuclear material and neutrons (mainly thermal neutrons) carry out radiation capture reactions, the isotope abundances of all elements of the nuclear material change, and thus by measuring the isotope abundances, the thermal neutron fluence on the nuclear material can be estimated under a condition that the running time of the reactor is known. The provided method is simple, and the measurement of thermal neutron fluence is converted into measurement on isotope abundance.

The invention relates to a Fluent finite element simulation analysis and calculation-based pollution accumulation characteristic analysis method for a large umbrella skirt composite insulator under different air humidities. The Fluent finite element simulation analysis and calculation-based pollution accumulation characteristic analysis method is characterized by comprising the following steps: 1)determining the wind speed of an air flow field, the pollutant particle concentration, the change range of the particle size and the change range of the air humidity according to the meteorological characteristics of a region where a power transmission line is located; 2) establishing a flow field and insulator simulation model; 3) solving the simulation model to calculate the distribution of anair flow field around the insulator; and 4) adding pollutant particles into the air flow field obtained in the step 3), changing the air flow field into a gas-solid coupled two-phase flow model, and continuously solving to analyze the change rule of the collision rate of the pollutant particles and the insulator so as to obtain the pollution accumulation characteristic of the composite insulator.According to the Fluent finite element simulation analysis and calculation-based pollution accumulation characteristic analysis method, a characterization method of the air humidity is analyzed and summarized, and the relative humidity and the absolute humidity are converted according to a representation mode of the humidity in simulation software Fluent, so that a theoretical basis is provided for selection of a control variable air humidity change range.

The invention discloses a floating type low-floor tramcar limit calculation method and system, equipment and a medium. The most unfavorable position characteristic of a vehicle is determined by analyzing the hinging mode between modules, and the limit calculation of the vehicle on a line is divided into the limit calculation on a line straight section and the limit calculation on a line curve section, so that an engineering construction side can carry out construction according to different line conditions; the limit calculation of the straight line section of the line is divided into a vehicle body part and a bogie part, factors considered for the limit calculation of the vehicle body part and the bogie part are different, and the calculation accuracy is improved through the two parts; for the vehicle body part, a calculation model of the X-direction offset of the vehicle body is established by taking a single module and the whole vehicle as research objects, and a calculation model of the Y-direction offset of the vehicle body is established by taking a rigid body module as a research object, so that the calculation model is simpler, and the calculation result is more accurate; and only head and tail end modules and a middle module are calculated for limit calculation of a line curve section, and a calculation model is simplified.

The invention relates to an ultrahigh-precision multilayer film thickness drift error calibration method, which comprises the steps of of alternately moving a substrate to a sputtering region of two target materials for plating a multilayer film, and plating a first periodic multilayer film; enabling the substrate to be far away from the sputtering region, continuing sputtering the target materials, and simulating the plating process of the target periodic multilayer film; alternately moving the substrate plated with the first periodic multilayer film to the sputtering region again, and plating a second periodic multilayer film to form a calibration sample; and performing an X-ray grazing incidence reflection test on the plated calibration sample under fixed X-ray energy to obtain a test reflectivity curve, and obtaining a multilayer film drift error from the beginning to the end based on comparison between the test reflectivity curve and the simulated reflectivity curve, wherein the number of film pairs of the first periodic multilayer film and the second periodic multilayer film is 1 / 10-1 / 5 of the number of film pairs of the target periodic multilayer film. Compared with the prior art, the method has the advantages of high precision, small influence of instrument conditions and the like.

The invention discloses a temperature field simulation calculation method suitable for a doubly-fed motor brush slip ring system. The method comprises the following steps: establishing a 3D model of the brush slip ring system; meshing the 3D model according to the component distribution of the brush slip ring; acquiring material parameters, current magnitude, applied current load and boundary conditions of the brush slip ring; obtaining a heat generation rate and a convective heat transfer coefficient of the electric brush slip ring; and according to the 3D model after grid division, the material parameters, the current magnitude, the applied current load, the boundary condition, the heat generation rate and the convective heat transfer coefficient, performing simulation to obtain a temperature field of the electric brush slip ring. The temperature field condition of the electric brush slip ring under the working condition is accurately simulated by combining the working condition of the electric brush slip ring and utilizing knowledge related to electricity and thermodynamics, theoretical support is provided for temperature detection of an electric brush slip ring system, and technical support can also be provided for subsequent fault diagnosis of the electric brush slip ring.

The invention discloses a method for quickly optimizing plane parameters of an aircraft wing. The method comprises the following steps: 1, generating a wing configuration sample; 2, setting wing constraint conditions; step 3, screening aircraft configurations; 4, determining an optimization strategy and establishing a configuration optimization calculation model; 5, selecting an optimization target parameter; and 6) optimizing wing configuration. According to the method, a flight performance index serves as the final optimization target, a hierarchical optimization strategy is adopted, the calculation model is simplified, the calculation method is reasonably selected, the optimization efficiency is effectively improved, the optimization period is shortened, and the problems of cross-professional optimization, high optimization resource requirement and low optimization efficiency of a traditional optimization method are solved.

The invention discloses a calculation method for directly measuring the loss amount of the coal seam methane content. In order to solve the problem of inaccurate measurement of the coal seam methane content, a coal sample technology, a coal seam methane adsorption and desorption rule and a coal seam sampling form are adopted, and a least square method is adopted for directly measuring the loss amount of the coal seam methane content. According to the calculation method, the calculation model is simple, and the measurement result precision is greatly improved.