43results about How to "The calculation method is reasonable" patented technology

The invention discloses a wind-field turbulence computing method and a wind farm micro-siting method and device. The wind-field turbulence computing method comprises the first step of setting the roughness and barriers of the earth surface in a wind field area and establishing a three dimensional solid model of the terrain in the wind field area according to the actual situation in the wind field area to be selected, the second step of setting a fan solid model at a fan point location to be selected in the wind field area and establishing a rotational flow area corresponding to a blade rotation area of the fan solid model, and the third step of computing the turbulence intensity of all points in the wind field area when blades of the fan solid model rotate in the rotational flow area by utilizing computational fluid dynamics software. According to the wind turbulence computing method and the wind field micro-siting method and device, the computational accuracy of the turbulence intensity can be improved, and therefore micro-siting of a fan in a wind farm can be conveniently and accurately performed.

The invention discloses a method for detecting a target protruding from a plane based on double viewing fields without calibration. The method is carried out in the following steps: setting a scene marker; collecting images; detecting and working out four corresponding point pairs of the marker; solving a homography matrix according to the four corresponding marking point pairs; carrying out homography transformation for a right view; adjusting illumination brightness, and then carrying out registration and superposition; and judging the object protruding from the plane, thus obtaining the final judgment result. By using the method provided by the invention, the object protruding form the plane in a three-dimensional space can be obtained from a binocular viewing field, or two viewing fields with transformed attitudes in a monocular camera, without calibrating the camera; and the detection method has a reasonable operational method, high computing speed, and can meet the requirement of a three-dimensional vision system on accuracy and instantaneity of target detection.

The invention relates to the technical field of risk assessment of electric power systems and specifically relates to method for assessing comprehensive risks of a power transmission line in multiplemeteorological disasters. The method for assessing comprehensive risks of the power transmission line in multiple meteorological disasters comprises the following steps: comprehensive trip-out risk probability of a power transmission line is obtained; the comprehensive trip-out risk probability is used for determining risk probability of reclosing success, risk probability of reclosing failure andsuccessful forced power transmission and risk probability of reclosing failure and unsuccessful forced power transmission; probability of comprehensive fault risks of the power transmission line is determined; according to a comprehensive coefficient of influence factors, probability of comprehensive risks of the power transmission line is determined; according to a risk and harm value, the comprehensive risks of the power transmission line are determined. Via the method, the comprehensive risks of the line are assessed, and pertinent prediction and theory support can be provided for a commander of an electric power system.

The present invention provides a fruit tree canopy illumination distribution calculation-based clipping evaluation method. The method comprises the following steps that: in each of any two years in N years before a current year for clipping evaluation, a sample tree and a tree under test are clipped in the same way in the spring, and sprout, thereafter, the box counting dimensions of the three-dimensional point cloud data of the canopy of the sample tree in cubic grids at different positions and the illumination intensity or relative illumination intensity of the sample tree in each grid during a canopy curtain stable phase are obtained, and a mathematical model is established; and the illumination intensity or relative illumination intensity distribution result of the canopy curtain stable phase of the tree under test in the current year for clipping evaluation is predicted through the mathematical model, and whether the fruit tree is clipped properly is evaluated. The method has the advantages of quickness, convenience, reasonable calculation method, high accuracy and suitability for automatic programming, and can greatly improve work efficiency and reduce the labor intensity of the workers.

The invention discloses an elastic-plastic buckling bearing capacity calculation method which comprises the following steps: S1, carrying out linear elasticity analysis on a truss structure under a stress load condition, and determining the most unfavorable rod piece of the truss structure under the load condition; S2, calculating and acquiring the linear elastic buckling bearing capacity and the elastic-plastic buckling bearing capacity of the most unfavorable rod piece of the truss structure; S3, calculating the elastic-plastic buckling bearing capacity of the truss structure according to the elastic-plastic buckling bearing capacity of the most unfavorable rod piece of the truss structure; S4, respectively calculating the elastic-plastic buckling bearing capacity of the truss structure by adopting a characteristic value buckling analysis method and a riks analysis method in finite element software Abaqus, comparing and analyzing the obtained elastic-plastic buckling bearing capacity result of the truss structure and the calculated elastic-plastic buckling bearing capacity result of the truss structure so as to verify the correctness and feasibility of the elastic-plastic buckling bearing capacity of the truss structure.

The invention relates to a blood flow speed calculation method for the coronary artery based on a radiography image. The method comprises the following steps that a coronary artery radiography image sequence is acquired; each frame of the acquired coronary artery radiography image is divided and subjected to binaryzation, and a coronary artery tree is extracted; target blood vessel center lines are extracted from the coronary artery tree; according to the change condition of the lengths of the target blood vessel center lines of different frames, the average blood flow speed of a target bloodvessel in the filling stage is calculated through fitting.

The invention discloses a method for observing and calculating depth of newly-generated swelling shrinking deformation of an excavation expansive soil slope surface. The method comprises the following steps of: carrying tracking observation by embedding a displacement meter in a shallow shaft, carrying out time effect statistic analysis on an observation result based on assumption of linear attenuation of the swelling shrinking deformation along the depth of the slope surface, and calculating the depth of the swelling shrinking deformation of a slop surface soil body under the action of weather by utilizing a linear equation on the premise of reasonable linear assumption verified by observation data. The method for observing and calculating the depth of the newly-generated swelling shrinking deformation of the excavation expansive soil slope surface, disclosed by the invention, overcomes difficulty that a fixed point is hard to exactly arrange by a surface mark measurement method, also has the advantages of high precision of the observation data and small influence by personal factors compared with the surface mark measurement method, and is reasonable in calculating method and simple and convenient to calculation; and analysis parameters of a protection design matching conditions of local weather can be provided for a protective barrier of the excavation expansive soil slop surface through the results obtained by the observation and the calculation according to the method disclosed by the invention.

The invention relates to a method for determining carbonate reservoir saturability. The method for determining the carbonate reservoir saturability is applied to the determination of heterogeneous carbonate reservoir water saturability. Firstly, a carbonate reservoir saturability capillary tube pressure function is established, standardization is performed on the carbonate reservoir oil-water transition zone electric-log interpretation water phase saturability of each oil well, then polynomial regression is performed with the capillary tube pressure J function, and an iteration method is used to determine the carbonate reservoir saturability. The method for determining the carbonate reservoir saturability has the advantage that a reasonable and reliable calculation method is provided for the calculation of the heterogeneous carbonate reservoir water saturability lack of core data.

The present invention discloses a calculation method for calculating the thickness of the loosened zone of the soft coal and rock of a deep roadway and a measurement device based on the method. The calculation method comprises the steps of (1) defining the distance between the initial position of a measuring point and the surface of a roadway to be r and the displacement of the measuring point to be u, and constructing an expression of u varying with r, wherein the measuring point is in the drill hole of the soft coal and rock of the deep roadway and is within the range of the loosened zone, u0, k1 and k2 are coefficients; (2) measuring the varying process of the u of more than two measuring points along with r, and calculating the values of k1 and k2; (3) inputting the obtained values of k1 and k2 into the following equation of L=-k2ln(20k2 / k1), and calculating the value of the thickness L of the loosened zone of the soft coal and rock of the deep roadway. The calculation method is simple, reasonable and easy to implement, and high in calculation accuracy. Obvious errors caused by the empirical estimation can be avoided. Meanwhile, the measurement device is simple in structure and convenient in operation, which can be well be applied to the calculation method of the present invention. In this way, the engineering detection on the thickness of the loosened zone of the soft coal and rock of the deep roadway and the real-time display of the thickness are realized.

The invention discloses a crude oil conveying pipeline leakage detection system structure and a leakage position detection method. The structure comprises a pipeline upstream station structure and a pipeline downstream station structure, wherein an upstream pressure transmitter, an oil conveying pump frequency converter and an upstream flow meter are respectively arranged at a pipeline upstream station; the upstream pressure transmitter, the oil conveying pump frequency converter and the upstream flow meter are respectively connected to an upstream station built PLC; a downstream pressure transmitter and a downstream flow meter are respectively arranged at a pipeline downstream station, and the downstream pressure transmitter and the downstream flow meter are connected to a downstream station built PLC; and the upstream station built PLC and the downstream station built PLC are connected with a system assembly through a communication network by using a Modbus for TCP / IP. The system assembly can directly collect data of the upstream station built PLC and the downstream station built PLC.

The invention discloses a build-in length and uplift value calculating method applicable for a narrow foundation pit. The calculating method comprises the step (1) of judging whether a foundation pitis the narrow foundation pit, a supporting structure of the foundation pit comprises support piles and inner supports, if the ratio of the foundation pit depth to the foundation pit width is larger than 1, and the influence of frictional resistance between the supporting structure and soil mass in the pit on the stress and deformation state of the soil mass in the pit prevails, the foundation pitis the narrow foundation pit; and the step (2) of obtaining the build-in length of the foundation pit according to the condition that the unloading stress of the bottom surface position of the foundation pit is equal to the frictional resistance between the soil mass at the position and the supporting structure when the pit is evacuated to the pit bottom in one time. According to the method, the interaction between the supporting structure and the soil mass is introduced; and the method can reflect the influence of the soil mass property on the build-in length and the uplift value fully, and can be applied to foundation pits of any shape.

The invention discloses an intelligent device and method for correcting trapezoidal defects of a slab section in real time in an online manner. The intelligent device comprises a crystallizer and a sector, and further comprises an infrared measuring device and a crystallizer cooling water system, wherein the crystallizer is arranged at the top end of the sector; the infrared measuring device comprises a first infrared measuring device and a second infrared measuring device; the first infrared measuring device is arranged on the outer arc of the sector at the tail end; the second infrared measuring device is arranged on the inner arc of the sector at the tail end; the crystallizer cooling water system comprises a crystallizer cooling water operation module and a crystallizer cooling water PLC control module; the first infrared measuring device and the second infrared measuring device are respectively electrically connected with the crystallizer cooling water operation module; the crystallizer cooling water operation module is electrically connected with the crystallizer cooling water PLC control module; and the crystallizer cooling water PLC control module is used for controlling the amount of cooling water entering and exiting from the inner and outer arcs of the crystallizer.

The invention discloses a theoretical calculation method for the water content of a mixed material of a cement stabilized macadam road pavement, and aims to determine an optimal water content of the mixed material of the cement stabilized macadam road pavement, and the optimal water content of the mixed material can be relatively precisely and reasonably determined with comparison with an indoor testing result. The theoretical calculation method comprises the following steps: performing theoretical calculation on the standard water rate of cement in a test part used in an indoor test, the water absorption rate of an aggregate and the water rate of a middle gap of the mixed material, converting calculated results into the water amount of the cement in the test part, the water absorption amount of the aggregate and the water amount of the middle gap of the mixed material so as to determine an actual optimal water amount of the mixed material, and further converting the optimal water amount of the mixed material into the optimal water content of the mixed material. By adopting the theoretical calculation method, the situation that the optimal water content of the mixed material can be only determined by using an indoor testing method can be changed, the proportioning rate of the water content of the mixed material of the cement stabilized macadam road pavement can be relatively and reasonably designed, the construction quality can be improved, rework can be avoided, and the production cost can be lowered.

The invention discloses a method for detecting a target protruding from a plane based on double viewing fields without calibration. The method is carried out in the following steps: setting a scene marker; collecting images; detecting and working out four corresponding point pairs of the marker; solving a homography matrix according to the four corresponding marking point pairs; carrying out homography transformation for a right view; adjusting illumination brightness, and then carrying out registration and superposition; and judging the object protruding from the plane, thus obtaining the final judgment result. By using the method provided by the invention, the object protruding form the plane in a three-dimensional space can be obtained from a binocular viewing field, or two viewing fields with transformed attitudes in a monocular camera, without calibrating the camera; and the detection method has a reasonable operational method, high computing speed, and can meet the requirement of a three-dimensional vision system on accuracy and instantaneity of target detection.

The invention provides a coal-pillar-free roof-cutting gob-side entry retaining inner roof supporting resistance calculation method, which comprises the following steps: establishing a coal-pillar-free roof-cutting gob-side entry retaining inner roof structure model, and sequentially determining a basic roof overlying strata acting force, a basic roof structure sliding instability transfer acting force and a roof-cutting control strata structure transfer acting force; and the supporting resistance of the roof in the non-coal-pillar roof-cutting gob-side entry retaining roadway is effectively calculated by calculating the acting force of an overlying rock layer on the basic roof, the sliding instability transmission acting force of the basic roof structure and the transmission acting force of a roof-cutting control rock layer structure. The supporting method and parameters of the roof in the roadway are determined more reasonably and accurately. The accuracy of calculating the supporting resistance of the roof in the coal-pillar-free roof-cutting gob-side entry retaining roadway is improved.

The invention relates to the technical field of slope stability analysis, and discloses a slope stability evaluation method under the influence of coal mine mining, comprising the following steps: step 1, acquiring terrain parameters and rock-soil body parameters; 2, obtaining coal mine underground mining related calculation parameters; step 3, determining surface movement deformation by adopting double-line calculation; the double-line calculation comprises I-line theoretical calculation and II-line numerical calculation; step 4, comparing the earth surface movement deformation under the mining influence obtained in the double-line calculation, and selecting the earth surface movement deformation according to a preset condition; 5, calculating the slope stability under the mining influence by adopting a limit equilibrium method; and 6, comprehensively analyzing and evaluating the stability of the mining slope. According to the method, numerical simulation and a limit equilibrium method are combined for calculation and analysis, the analysis dimension is comprehensive, and high calculation accuracy can be achieved; and an effective and reliable basis can be provided for stability evaluation, construction and utilization, reclamation and repair and the like of the goaf in the mountainous and hilly areas.

The invention discloses a method for determining a construction land area influence factor weight value by using a neural network algorithm, which comprises the following steps of: expanding originalsample data, dividing the original sample data into two groups, subtracting the sample data of the first group from the sample data of the second group in sequence to form new expanded sample data, and determining the construction land area influence factor weight value. By adopting the method of firstly grouping and then calculating the difference values in a one-to-one correspondence manner, thesamples are expanded, and the importance degree of each influence factor to the construction land area is not changed. In addition, a new BP neural network is established to train an expanded sampleand extract related rules, and MIV is considered as one of the indexes with the best variable correlation in the neural network. The calculation method for determining the influence factor and the construction land area weight coefficient is more reasonable and scientific.

The invention discloses a method for calculating the design thickness of a 12-bolt tower foot slab, comprising: determining the diameter of the anchor bolt according to the uplift force on the tower foot slab; calculating the minimum width of the tower foot slab according to the structural requirements according to the diameter of the anchor bolt; The uplift force distribution coefficient of the bolt holes calculates the uplift force of each anchor bolt, and verifies whether the strength of each anchor bolt meets the force requirements: if the force requirements are met, increase the grade of the anchor bolts and re-according to the structure It is required to calculate the minimum width of the tower foot plate; if the force requirement is not met, further calculate the minimum thickness t required for the tower foot plate under tension la ;Calculate the minimum thickness t required for the foot plate under compression ya , choose t ya and t la The greater value of the two is taken as the design thickness t of the tower foot plate. The present invention considers the influence of uneven force on the foundation bolts and the influence of stress concentration near the bolt holes, and truly reflects the force mechanism of the tower foot plate.

The present invention discloses a calculation method for calculating the thickness of the loosened zone of the soft coal and rock of a deep roadway and a measurement device based on the method. The calculation method comprises the steps of (1) defining the distance between the initial position of a measuring point and the surface of a roadway to be r and the displacement of the measuring point to be u, and constructing an expression of u varying with r, wherein the measuring point is in the drill hole of the soft coal and rock of the deep roadway and is within the range of the loosened zone, u0, k1 and k2 are coefficients; (2) measuring the varying process of the u of more than two measuring points along with r, and calculating the values of k1 and k2; (3) inputting the obtained values of k1 and k2 into the following equation of L=-k2ln(20k2 / k1), and calculating the value of the thickness L of the loosened zone of the soft coal and rock of the deep roadway. The calculation method is simple, reasonable and easy to implement, and high in calculation accuracy. Obvious errors caused by the empirical estimation can be avoided. Meanwhile, the measurement device is simple in structure and convenient in operation, which can be well be applied to the calculation method of the present invention. In this way, the engineering detection on the thickness of the loosened zone of the soft coal and rock of the deep roadway and the real-time display of the thickness are realized.

The invention discloses a build-in length and uplift value calculating method applicable for a narrow foundation pit. The calculating method comprises the step (1) of judging whether a foundation pitis the narrow foundation pit, a supporting structure of the foundation pit comprises support piles and inner supports, if the ratio of the foundation pit depth to the foundation pit width is larger than 1, and the influence of frictional resistance between the supporting structure and soil mass in the pit on the stress and deformation state of the soil mass in the pit prevails, the foundation pitis the narrow foundation pit; and the step (2) of obtaining the build-in length of the foundation pit according to the condition that the unloading stress of the bottom surface position of the foundation pit is equal to the frictional resistance between the soil mass at the position and the supporting structure when the pit is evacuated to the pit bottom in one time. According to the method, the interaction between the supporting structure and the soil mass is introduced; and the method can reflect the influence of the soil mass property on the build-in length and the uplift value fully, and can be applied to foundation pits of any shape.

The invention discloses a tunnel strengthening treatment method and a support structure based on the positions of dissolving cavities. The tunnel strengthening treatment method includes the following steps that firstly, the nearest distance L between the dissolving cavities and a tunnel is determined; secondly, the safety thickness H of a karst region of the tunnel is determined; thirdly, the safety of the tunnel affected by the dissolving cavities of the karst region is judged; and fourthly, different tunnel support structures are adopted according to the safety of the tunnel. The tunnel strengthening treatment method and the support structure based on the positions of the dissolving cavities have the following beneficial effects that firstly, a calculation method is reasonable, consideration is comprehensive, design is reasonable, the construction speed is high, the use effect is good, and different support methods and structures are adopted according to the different safety conditions of the tunnel; and secondly, the corresponding support structures are selected according to the positions of the dissolving cavities, and the construction and safety operation problems of passing of the part, in the karst region, of the tunnel can be effectively solved.

The invention relates to a water turbine in a hydropower station, and discloses a calculation method for the cavitation coefficient of a vertical-axis axial-flow paddle-type hydraulic turbine power station, which can more reasonably calculate the cavitation coefficient of a vertical-axis axial-flow paddle-type hydraulic turbine power station to meet new hydropower engineering requirements. The inventive method is as follows: determine the specific rotational speed of the axial flow propeller type water turbine, and described specific rotational speed is denoted as n s ; Determine the maximum application head of the axial flow paddle turbine, and the maximum application head is denoted as H max , and judge H max range; according to H max The formula for calculating the cavitation coefficient of the power station in the corresponding range calculates the cavitation coefficient of the power station, and the cavitation coefficient of the power station is denoted as σ p , the formula for calculating the cavitation coefficient of the power station in the range is: when H max ≤30m, when H max When the distance is greater than 30m, the present invention is applicable to the calculation of the cavitation coefficient of a vertical-axis axial-flow paddle turbine power station, and can better meet the requirements of new hydropower projects.

The invention discloses a river health assessment method for a sediment-laden river, and the method comprises the following specific steps: S1, determining a river evaluation unit, dividing the river evaluation unit into a plurality of evaluation river reaches according to the length of the evaluation unit, determining a river evaluation index system, and setting a score assignment standard; s2, index monitoring points are established according to the evaluation river reach, and data acquisition of river evaluation indexes is carried out; and S3, independently calculating each river evaluation index data according to the data acquired in the S2, and assigning scores to each index according to the score assigning standard in the S1. According to the river health assessment method, river health assessment is carried out by independently adopting the water quality superior and inferior index, the water body self-purification index and the sediment pollution index, the number of adopted indexes is small, but most necessary indexes needed by river health assessment are included, the adopted indexes are low in obtaining difficulty, the requirement for analysts is low, and the river health assessment method is more suitable for large-scale popularization.

The present invention provides a small flow anti-surge valve core structure for a pressure regulator, which belongs to the technical field of gas pressure regulating equipment in a gas transmission and distribution system. The small flow anti-surge valve core structure for a pressure regulator includes a valve body, a gas flow channel formed by a valve port or a valve seat arranged in the valve body, and a valve core arranged in the valve body and movably plugged into the flow channel; the flow channel is a vertical through hole with a consistent inner diameter, the valve core is in the shape of an inverted frustum, and the diameter of the top surface of the inverted frustum matches the inner diameter of the flow channel; the small flow anti-surge valve core structure for a pressure regulator of the present invention designs the valve core in the shape of an inverted frustum, so that the actual opening of the pressure regulator at a small flow rate is greater than the original required opening, so that the pressure regulator avoids the most unstable position and prevents frequent surges in the small flow range. The present invention also provides a method for calculating the size of a small flow anti-surge valve for a pressure regulator. The final calculation formula obtained by this method is simple, and the valve core shape and size suitable for the pressure regulator can be quickly and accurately calculated, which can greatly save the time for valve core size design.

The invention discloses a method for discriminating fault activation caused by tunnel excavation, and relates to the field of tunnel and underground engineering design and construction, and the method specifically comprises the following steps: S1, surveying or looking up site geological parameters, and obtaining rock mechanical parameters of a fault and surrounding rock strata, a fault plane friction coefficient [mu], and stress state parameters representing fault plane feature points; and S2, establishing a numerical model of fault site tunnel excavation, endowing the fault plane slippage weakening friction constitutive, and appointing the weakening relationship between the fault plane friction coefficient mu and variables such as the slippage rate or the contact pressure. According to the method, the surrounding rock stress field evolution process in the tunnel excavation process is calculated, the fracture surface friction constitutive structure is introduced to achieve the bonding weakening process of the fault so as to describe the slippage instability of the fracture surface, the coulomb instability criterion for describing rock shear fracture is used for judging the activation behavior of the fracture surface, the mechanical mechanism of fault slippage is met, and the method is suitable for tunnel excavation. The method is simple and easy to use, and still has high accuracy.

The invention relates to a method for calculating the power generation cost of a perovskite solar cell. The method comprises the following steps: calculating the perovskite cell kilowatt-hour cost COE: calculating the value of total expenditure converted from the ith year to the beginning in the life cycle of a photovoltaic power station, and equally dividing the total investment cost of the photovoltaic power station and the total power generation capacity in the life cycle to obtain the average cost at any moment in the life cycle; calculating the initial investment I0 of the power station;calculating the expenditure Ii of the ith year in the service life of the power station; calculating the generating capacity Ei of the ith year in the service life of the power station. The beneficialeffects of the invention are that: the method is suitable for large-scale production; according to the method, the manufacturing cost of the perovskite cell is considered; on the basis of parameterssuch as photovoltaic construction cost, operation and maintenance cost, financial cost, depreciation cost and annual effective generating capacity; a PMT (Payment) function and an NPV (Net Pretent Value) function are utilized to calculate the power cost per kilowatt hour, and a detailed, reasonable and accurate calculation method is provided for the calculation of the power generation cost of theperovskite solar cell.

The invention provides a pruning evaluation method based on fruit tree canopy illumination calculation. The method includes: in each of the two years in the first N years of the pruning evaluation year, after the same spring pruning and germination of the sample tree and the tree to be tested, the three-dimensional point cloud data of the sample tree canopy are obtained in different position cubes The number of box counting dimensions in the grid and the light intensity or relative light intensity in each of the cube grids of the sample tree in the stable period of the leaf curtain establish a mathematical model; the leaf curtain of the tree to be measured in the current year is predicted and pruned by the mathematical model The results of light intensity or relative light intensity distribution in the stable period can be used to evaluate whether the fruit trees are pruned reasonably. The method has the advantages of rapidity, convenience, reasonable calculation method, high accuracy, and is suitable for automatic programming, and can also greatly improve operation efficiency and reduce labor intensity of operators.

The invention discloses a calculating method for an extra large span chamber second liner supporting structure. The calculating method comprises the following steps that firstly, an upper limit valueof the deformation of a chamber is obtained by carrying out fitting analysis on monitoring measurement data; secondly, the residual deformation of the chamber is worked out; thirdly, the downward sliding force and the sliding resistant force of an unstable block on the upper portion of the chamber are worked out; fourthly, the pressure, acting on the second liner supporting structure, of the unstable block is worked out; fifthly, the residual deformation and the action pressure of the unstable block are taken as input conditions and act on the second liner supporting structure simultaneously,and the stress state of the second liner supporting structure is worked out through calculation software. According to the calculating method, the residual deformation and the action pressure of the unstable block are taken as the input conditions to carry out calculation of the second liner supporting structure, and the method conforms to the deformation feature and the stabilizing mechanism of the extra large span chamber; and the obtained thickness of the second liner supporting structure is reasonable, and the issues such as increasing of the manufacturing cost, pouring difficulty and prolonging of the working period due to large lining thickness of the extra large span chamber are avoided.