33results about How to "Accurate calculation accuracy" patented technology

The invention discloses a slope stability fine evaluation method, and belongs to the field of slope engineering. The slope stability fine evaluation method solves a reliability problem of the slope stability evaluation result and improves the accuracy of the slope stability evaluation result. The method comprises the following steps of: mathematically manipulating a normal ultimate equilibrium evaluation method to a generalized excess thrust method under any state in a generalizing way, and then based on a linear programming theory, a finite element academic method and a numerical analysis method, creating a micro-unit system to perform fine evaluation of the slope stability. Therefore, the reliability of the slope stability evaluation result can be improved, and the slope safe state can be reflected truly.

The invention discloses a welding seam image identification method, a computer device and a computer readable storage medium. The method includes the steps: receiving image data, performing Gaussian filtering on the received image data, and performing binarization processing on the image data after Gaussian filtering; performing edge detection on an image after binarization, and calculating a structural light center line in the image after binarization; calculating an initial straight line model of a laser bar in the image after edge detection by the aid of a random sampling consistency algorithm, calculating an interest area based on the initial straight line model, calculating an accurate straight line model of a laser bar in the image in the interest area by the aid of the random sampling consistency algorithm again, and calculating an area of welding seam characteristic information in the interest area. The invention further provides a computer device for implementing the method and a computer readable storage medium. According to the method, the welding seam characteristic information in the image can be rapidly identified, and the identifying efficiency of welding seam characteristics is improved.

The embodiment of the invention provides a method and a device for detecting a super capacitor in a pitch system. The method comprises the following steps of: acquiring a charging start time in the pitch system in which a charger uses a PID algorithm to control the charging of the super capacitor, and an output current in a subsequent process, wherein the control input quantity adopted by the PIDalgorithm is the voltage deviation between a given voltage value and an actual voltage value of the super capacitor, the given voltage value is a fixed value, and the voltage deviation at the chargingstart time is 0; calculating the voltage deviation according to the output current and the control logic of the PID algorithm, and taking the change amount of the voltage deviation as the change amount of the actual voltage of the super capacitor in the charging process; and calculating the capacitance value of the super capacitor according to the change amount of the actual voltage of the supercapacitor in the charging process and the output current in the corresponding time period. According to the scheme provided by the invention, the capacitance value of the super capacitor in the pitchsystem of the wind turbine can be detected quickly, conveniently and accurately, the detection process does not need to be stopped, and the online detection can be realized.

The invention discloses a medical resource scheduling platform, which comprises a medical resource distribution system, and is characterized in that the medical resource distribution system comprisesa medical resource distributor, an operation module and a plurality of medical resource terminals; by means of the distribution system, medical resources can be scheduled and matched systematically through an online mode by means of the Internet, and therefore the medical resource matching efficiency and accuracy are improved; furthermore, the platform also comprises a doctor-side identity authentication system, so that the authenticity and efficiency of doctor identity authentication can be improved; furthermore, the platform comprises a search matching system, so that a doctor can search a matching result more accurately.

The invention relates to the technical field of oil and gas field development, in particular to a production splitting method for a commingling production gas well. The production splitting method forthe commingling production gas well comprises the following processes that (1) splitting is conducted according to the gas production rate Q<sc> and a Kh value in a standard state of the gas well toobtain a gas production rate initial value of a production layer j; (2) the sum of the gas volumetric flow rate of the production layer j and a production layer n in the standard state is obtained; (3) a Reynolds number initial value Re<j>(0) and a friction factor initial value f<j>(0) under a gas flow velocity initial value v<j>(0) is calculated; (4) the sum of the gas volumetric flow rate of theproduction layer j and the production layer n in the standard state is calculated; and (5) the production of the production layer j is calculated, and error judgment is conducted. According to the production splitting method, production splitting is conducted according to actual wellbore pressure data and a gas well tube flow equation, thus the theoretical basis is more sufficient, and the calculation precision is more accurate.

The invention discloses a time-lag electric power system stability discrimination method based on IGD-IRK (infinitesimal generator discretization method with implicit Runge-Kutta). The method includesthe steps: building a time-lag electric power system model; discretizing an infinitesimal generator by an implicit Runge-Kutta method to obtain a discretized matrix of the infinitesimal generator; transforming an infinite dimensional characteristic value problem into a finite dimensional characteristic value problem; calculating approximate values of maximum characteristic values of module valuesof the obtained discretized matrix of the infinitesimal generator by an implicit Arnoldi algorithm; performing sparse implementation by the aid of properties of Kronecker products, and iteratively solving matrix inversion and vector product problems by an induction dimension-decreasing algorithm; transforming the approximate values of the maximum characteristic values of the module values of thediscretized matrix of the infinitesimal generator into approximate characteristic values of a time-lag electric power system model; correcting the approximate characteristic values by a Newton iteration method to obtain accurate characteristic values; judging stability of a time-lag electric power system according to the accurate characteristic values.

The invention discloses a charging accuracy diagnosis method and device and a chip. The charging accuracy diagnosis method comprises the steps of obtaining a request current value when a battery management system requests a current from a charging pile in a designated charging stage of the battery charging process; obtaining a feedback current value output by the charging pile in response to the battery management system; and on the basis of the request current value and the feedback current value, calculating an output current accuracy value of the charging pile in the designated charging stage. According to the charging accuracy diagnosis method and device and the chip disclosed by the embodiment of the invention, the output current accuracy of the charging pile can be accurately judgedin the battery charging process.

The invention discloses an intelligent contract operation code coverage rate calculation method and system. The method comprises the steps that when a source code file of an intelligent contract is obtained, a deployment request is sent to a blockchain, and thus the blockchain can deploy the intelligent contract according to the deployment request and return a contract address of the intelligent contract; according to the contract address of the intelligent contract returned by the blockchain, identification information of the intelligent contract is obtained, a transaction request which contains the identification information is constructed, the transaction request is sent to the blockchain, and thus the blockchain can output a corresponding statistical result file to a preset storage medium according to the identification information of the transaction request; according to the identification information, the statistic result file is obtained in the storage medium, and according to the statistic result file and a preset formula, the intelligent contract coverage operation code rate is calculated. The method and system simplify the calculation process of the intelligent contract coverage rate and improve the calculation precision of the intelligent contract coverage rate.

An embodiment of the present invention provides a method and device for detecting a supercapacitor in a pitch system. The method includes: obtaining the output current of the charger in the pitch system at the initial moment of charging to the supercapacitor by using the PID algorithm and the subsequent process , the control input used by the PID algorithm is the voltage deviation between the given voltage value and the actual voltage value of the supercapacitor, the given voltage value is a fixed value, and the voltage deviation at the beginning of charging is 0; according to the output current and the PID The control logic of the algorithm calculates the voltage deviation, and takes the change of the voltage deviation as the change of the actual voltage of the super capacitor during the charging process; it is calculated according to the change of the actual voltage of the super capacitor during the charging process and the output current in the corresponding time period The capacitance of the supercapacitor. The solution provided by the invention can quickly, conveniently and accurately detect the capacity value of the supercapacitor in the pitch system of the wind turbine, and the detection process does not need to be stopped, and online detection can be realized.

The invention mainly discloses an ultrasonic wave heat testing device which comprises a temperature sensor I and a temperature sensor II, a pair of ultrasonic transceivers arranged in medium, a controller unit for processing process data, and a display apparatus, wherein the temperature sensor I and the temperature sensor II are respectively arranged at a water outlet position and a water return position; the temperature sensor I, the temperature sensor II and the ultrasonic transceivers are connected to the input end of the controller unit, and the controller unit which is provided with calculation program in the internal part calculates according to the received data at the input end, and feeds back the result to the display apparatus. According to the ultrasonic wave heat testing device, heat (cold) quantity consumed by a user in a heat supply (cold supply) system is accurately measured, and the ultrasonic wave heat testing device is stable to use.

The invention provides a cubic room internal dimension measurement method and a storage medium. The method comprises the following steps: S1, recording first vector values obtained when a display screen center aligns each corner of a room respectively; S2, randomly generating a first preset number of three-dimensional array; S3, calculating the second vector value of each corner by taking the display screen center as the origin of a three-dimensional coordinate system according to each three-dimensional array; S4, performing unit processing on the second vector values; S5, calculating a unit vector deviation between a unit second vector value and the first vector value corresponding to each three-dimensional array; S6, calculating the similarity according to the unit vector deviation corresponding to each three-dimensional array; and S7, acquiring three-dimensional arrays with the highest similarity. Through adoption of the cubic room internal dimension measurement method, accurate dimension data of a cubic room can be quickly and automatically measured by software in a simple and feasible way. The method has the characteristics of easiness and convenience in operation, meeting ofdifferent requirements and high practicability.

The invention discloses a vehicle cooperative lane change method based on an artificial neural network and a system of the vehicle cooperative lane change method. The vehicle cooperative lane change method comprises the following steps of: S1, performing lane change data acquisition and lane change demand judgment; S2, performing game income calculation; S3, performing driving style score calculation; S4, performing weight adjustment; and S5, making a lane change decision. According to the vehicle cooperative lane change method disclosed by the invention, through the quantification of a vehicle driving style, game incomes are adjusted, so that an unmanned automobile can have the behavior ability of human, accidents caused by that the unmanned automobile does not understand a human driving style are avoided, and the traffic efficiency is optimized to the best efforts at a low cost of calculation time under the premise of guaranteeing safety.

The invention discloses a method for determining the passive intermodulation amount of a mesh reflector antenna. The steps are as follows: establishing an equivalent model of the mesh reflector antenna; respectively loading carrier signals to the equivalent model of the mesh reflector antenna to obtain the surface Current distribution; calculate the overlap voltage of the mesh reflector antenna equivalent solid surface antenna model; establish the passive intermodulation analysis model at the wire overlap, and obtain the intermodulation current of each order; select the ml space on the mesh reflector sampling points, and calculate the passive intermodulation quantities of the corresponding ml spatial coordinate sampling points on the equivalent solid surface antenna model. The invention solves the technical problem that the passive intermodulation amount of the electric large-scale mesh reflector antenna cannot be obtained through calculation and analysis.

The present invention relates to a gas treatment method, specifically to a method for production regulation of a chelated iron desulfurization process. According to the method, solid phase impurities and liquid phase impurities are removed from hydrogen sulfide-containing raw material gas through an acid-gas separator, the obtained material sequentially passes through a pre-absorption tower and an absorption tower, and reacts with the chelated iron barren solution so as to remove the hydrogen sulfide gas, and the purified nature gas enters a purified gas separator to remove water, is subjected to measurement detection, and then is directly and externally output. With the method, normal use can be achieved even when the hydrogen sulfide content in the raw material gas is changed, and production requirements can be met through adaptable regulation of other parameters according to the method so as to avoid regulation of the production process. In addition, according to the actual situation requirements of the production, the optimal desulfurization solution circulation amount is selected so as to reduce equipment loss, reduce pump power consumption and avoid waste of energy sources.

A power distribution network simulation load flow calculation method relates to a simulation load flow calculation method, and aims to solve the problems that an existing simulation load flow calculation method is long in a calculation time; the method comprises the following steps: 1, reading original data of a distribution network; 2, forming a network nodal admittance matrix; 3, reading initialvoltage values of all nodes as balance node voltages, setting a node active power deviation second order item as zero, and setting a cycle variable initial value as zero; 4, calculating iteration deviation; 5, calculating voltage deviation; 6, correcting voltages of all nodes; 7, calculating the active power deviation second order item; 8, determining whether a difference between two adjacent iteration results of the active power deviation second order item is smaller than a given error or not, if yes, outputting the result, otherwise, turning to step 9; 9, determining whether the cycle variable has reached the set maximum cycle frequency N or not, if yes, outputting the result, otherwise, adding 1 on the cycle frequency and turning to step 4. The method can fast calculate the power distribution network load flow states, thus providing basic data for power distribution network short circuit calculation and stable analysis.

The invention relates to a FPGA (Field Programmable Gate Array) implementation device for solving least square problem based on Cholesky decomposition, which is suitable for solving the least square problem and settles the problem that computation efficiency of PC (Personal Computer) cannot satisfy real-time and embedded applications; the device comprises a to-be-solved matrix input interface module, a decomposing module and a solving module, wherein an output end of the to-be-solved matrix input interface module is connected to an input end of the decomposing module, and the output end of the decomposing module is connected to the input end of the solving module in order to satisfy real-time, low-consumption and embedded applications.

The invention discloses a calculation method of optimal self-rotational angular velocity for fixed-axis rotation of a service spacecraft. The calculation method comprises steps of firstly carrying out Fourier transform on the measured gesture quaternion of an object to obtain three characteristic angular frequencies of object movement; using the filtering method to allow the estimation values of the angular frequencies to be quite accurate; and finally, multiplying the characteristic angular frequency with the biggest effect with 2 to obtain the optical angular velocity of the rotation of the service spacecraft. According to the invention, through the designed self-rotating angular velocity, the service spacecraft is allowed to rotate, so the relative angular velocity and the relative linear speed between the service spacecraft and the object can be effectively reduced, load during capturing of a mechanical arm is reduced and safety of on-orbit services in the space is improved; and in addition, although the service spacecraft carries out fixed-axis rotation, the designed self-rotating angular velocity is not only defined in objects carrying out fixed-axis rotation, so for objects rolling over along the three axes, the relative angular velocity can be also effectively reduced.

The embodiment of the present invention provides a steam turbine regulation system and method that introduces overshoot peak correction. The embodiment of the present invention adds an overshoot peak correction module and / or initial The step delay module is used to eliminate the influence of the generator side on the model parameters of the steam turbine regulating system and the influence of the volume delay of the steam chamber in front of the high-pressure cylinder on the quality parameters, so that the power model curve after parameter identification is more accurate than the actual load, and can make the The quality parameters are up to standard. The embodiment of the present invention also adopts the improved PSO intelligent optimization algorithm, so that the calculation precision is more accurate and the adaptability to the model is wider.