57results about How to "Clear theory" patented technology

The invention relates to a medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data. A complete set of whole-process comprehensive energy efficiency evaluation method for a static and dynamic distribution network is constructed in a distribution network energy efficiency evaluation system. Through the method, various attribute elements of the distribution network can be scientifically, integrally and comprehensively reflected. The system is clear in theory. Compared with the traditional energy-saving and loss-reduction modification measures only based on a quarter line loss method and a sweeping approach, the system has more scientificalness and pertinency and provides a brand new thinking and method for energy efficiency evaluation and energy-saving modification for the distribution network. The invention has a valuable reference to specific distribution network energy efficiency evaluation in various regions, makes pointed references to the distribution network planning and modification construction and also helps distribution network operating personnel master the operating condition of distribution network energy efficiency. Scientific and reasonable distribution network construction and modification projects can be instructed and arranged in actual evaluation and planning works, reliable and economic operation of the distribution network is ensured, and huge economic benefits are created.

The invention discloses a double-shaft continuous rotation-based hybrid type platform inertial navigation system calibration method. The method comprises the following steps: (1) performing coarse alignment to obtain a coarse initial attitude matrix; (2) controlling an outer ring shaft and a platform body shaft of a platform system to rotate at the same angular speed, enabling an inner ring shaftto be under a locked state, and acquiring gyroscope and accelerometer output in the rotating process; (3) resolving an error state equation and an observation equation and calibrating gyroscope scalefactor error, gyroscope mounting error and accelerometer equivalent zero offset; (4) controlling an outer ring frame angle, an inner ring frame angle and a platform body frame angle to lock in a zerostate, rotating the platform body shaft by 180 degrees and locking, and acquiring output data of the gyroscope; (5) controlling the outer ring frame angle, the inner ring frame angle and the platformbody frame angle to lock in the zero state, rotating the outer ring shaft by 180 degrees and locking, and acquiring output data of the gyroscope; and (6) calculating the constant drift of the gyroscope. By the method, the calibration time is effectively shortened and the calibration efficiency is improved.

The invention relates to a charge-discharge-storage integrated station control method based on improved V2G (vehicle-to-grid) and priority scheduling. The charge-discharge-storage integrated station includes a charge station, an electrical changing station and a cascade station. The charge-discharge-storage integrated station control method includes the steps: 1) respectively taking every electricvehicle entering the charge-discharge-storage integrated station and the energy storage battery in the cascade station as one group of independent battery energy storage system, and predicting the real-time load distribution of the charge-discharge-storage integrated station; 2) determining the discharge lower limit of each group of battery energy storage system; 3) determining the charge-discharge priority of each substation in the charge-discharge-storage integrated station; and 4) according to the real-time power grid scheduling command and the predicted real-time load distribution, takingthe discharge lower limit of each group of battery energy storage system as the constraint condition, and according to the charge-discharge priority, determining the charge-discharge state of the each group of battery energy storage system. Compared with the prior art, the charge-discharge-storage integrated station control method based on improved V2G and priority scheduling can effectively avoid reducing the charging experience of the user because of over discharge of the electric vehicle which takes part in V2G, receives excess discharging and receives power grid scheduling, and achieves win-win of the electric vehicle user and the power grid.

The invention relates to a print file identification method based on print font library analysis and belongs to the technical field of print file identification. The method mainly comprises the steps of extracting the characteristics of Chinese character images of various types of sample printers, through a learning process, training samples into a characteristic value library corresponding to the same Chinese character of various types of printers used by a system, and matching the characteristic value library with characteristic Chinese character libraries sequentially to complete rough classification of the Chinese character libraries; based on the step above, characterizing Chinese characters more deeply through HU-moment characteristic values until the characterized characteristic information can uniquely identify the Chinese characters in the images. The computer identification method for identifying character images of different types of the printers through commonly-used character libraries is clear in theory, simple in process, convenient to operate, rapid and accurate and is an effective and workable method. The method integrates various technologies and useful information to improve the identification accuracy and provides an automatic computer print file identification system for public security and physical evidence identification departments.

The invention discloses a bridge moving vehicle load identifying method based on a Kaczmarz algebraic iterative reconstruction method. The bridge moving vehicle load identifying method includes steps of uniformly arranging photoelectric sensors and accelerometers in bridge preset measuring points; (2) building a simple physical mechanics model of a bridge; solving qn(t) in a time domain by convolution integral to obtain system equation like Af=b, wherein A is a given system matrix, b is a given bridge deck response, and f is a solved moving vehicle load; (4) identifying the bridge deck moving vehicle load f by selecting proper iterative times k, namely the bridge acceleration response by the Kaczmarz algebraic iterative reconstruction method. The Kaczmarz algebraic iterative reconstruction method only needs simple iteration to identify moving load, the iterative formula does not contain other auxiliary vectors except linear equation set, and the bridge moving vehicle load identifying method is convenient to input, clear in theory, easy to popularize and very applicable to identify the moving load.

The invention discloses a camera calibration method of a three-dimensional laser imaging system. The method utilizes characteristics points to establish a camera coordinate system, then obtains six deviation parameters of the camera coordinate system and a carrier coordinate system through differential computing, completes the calibration of the camera coordinate system, and finally obtains the precise conversion matrix from the carrier coordinate system to the camera coordinate system. At present no corresponding method can process the camera calibration method of a three-dimensional laser imaging system. The method provided by the invention is simple and clear, the programming is easy to realize, and the precision of integration of point cloud data and pictures in a three-dimensional laser imaging system is improved.

The invention discloses a point cloud model true color processing method of a three-dimensional laser imaging system. By a method of combining photos and point cloud, true color information of a scanned object is extracted through coordinate transformation to complete point cloud model true color processing. According to the invention, the trouble that true color processing of a three-dimensional stereoscopic model cannot be carried out at present is solved. Meanwhile, manual judgment is not required, there is no need to distinguish the shape of an object, and the point cloud is directly colored. The method provided by the invention has advantages of fast arithmetic speed, low time overhead and small workload. By the adoption of the method, true color effect of a three-dimensional stereoscopic model can be achieved well.

The invention discloses a method for measuring the static elasticity modulus of concrete. The method comprises the following steps: step 1, manufacturing concrete, with the elasticity modulus to be measured, into a standard cubic specimen, taking the specimen as a splitting tensile test specimen, and curing the specimen to a design age according to test requirements; step 2, preloading the specimen till the difference of two times of center line transversal deformation values meets the requirement; step 3, performing an official test on the specimen, and recording load and a center line transversal deformation value under the load when the loading speed is the same with preload and the loading stress reaches 50 percent of splitting tensile strength; step 4, taking the deformation value in the step 3 as transversal total deformation, and computing to obtain the elasticity modulus of concrete. The method is high in accuracy and simple to operate.

The invention provides an image-based speed measurement method for a rocket sled. A high-speed camera is used for shooting an operation process of a sled body continuously; and after completion of a test, pitching and orientation information correction of the high-speed camera relative to a track, sled body feature point extraction, and operation speed calculation are carried out, thereby completing measurement of the operation speed of the sled body. The method has advantages of high speed measurement precision, simple and clear idea, and easy programming implementation. With the method, the speed measurement precision of the key position in the rocket sled test can be improved.

The invention provides a numerical calculation method of an electromagnetic field response of a dipole source at an arbitrary position under layered geological conditions. The calculation method comprises the steps of: step S100, defining stratums according to the position of the dipole source in the layered stratums; step 200, performing orthogonal decomposition on the dipole source; step S300, deriving a Lorentz vector potential expression generated by the unit dipole source in each stratum; step S400, deriving an electromagnetic field expression in each stratum according to the Lorentz vector potential expression; step S500, calculating a Bessel functional integration in the electromagnetic field expression by adopting a Gaussian extrapolation method to obtain a numerical solution of the electromagnetic field; step S600, and acquiring the electromagnetic field response of the dipole source by multiplying the numerical solution by a dipole source moment. The calculation method utilizes the expressions that Lorentz vector potential between the adjacent stratums satisfy, utilizes the particular solution of the stratum where the dipole source locates for circulating recursion to obtain the Lorentz vector potential expressions of all stratums, and obtains the electromagnetic field expression by means of the Lorentz vector potential, finally calculates the Bessel functional integration in the electromagnetic field expression by adopting the Gaussian extrapolation method to obtain the electromagnetic field response of the dipole source, and has the advantages of clear theory and high calculation precision.

A cut-damage-free antiseismic collapse resistant masonry building and a building method thereof belong to the antiseismic and disaster preventing technical field of civil construction structure. The invention is characterized in that a masonry wall provided with an isolation joint or an isolation hole is an antiseismic collapse resistant building of cut-damage-free type. An important antiseismic area bends ahead of a common antiseismic area. In building process, a vertical isolation seam is arranged between a window wall, a lintel wall and the masonry antiseismic wall near the hole. When the masonry wall of beeline-shaped section is cut up, the middle of the long side of the section is provided with a vertical stage slot or the isolation hole. The extra strong efficiency of antiseismic bearing capacity of the masonry wall is controlled to make the masonry wall bend in earthquake. Crisp cut and slide of the whole section is avoided. After bending, the bearing capacity and the rigidity have little retrogression and good tensibility. The building has highly efficient collapse resistant capability, can be used for new construction or antiseismic security and antiseismic reinforcement of the existing masonry building. The invention is especially applicable to masonry houses in highly seismic region and reconstruction after earthquake.

The invention provides a HRTF frequency division band linear regression method based on physiological parameters. Firstly, HRTF of different subjects under the same azimuth in a CIPIC database is selected for principal component analysis to obtain principal component under the azimuth. Then, the correlation between principal components and physiological parameters of different subjects at different frequencies was calculated. The physiological parameters of low frequency, middle frequency and high frequency were obtained by statistical method. Finally, through the selected physiological parameters of low-frequency, intermediate-frequency and high-frequency linear fitting, phase reconstruction by the minimum phase method. The invention has different influence on different physiological parameters, The correlation analysis is applied to obtain physiological parameters affecting HRTF in different frequency bands, and linear regression is carried out by using the physiological parameters,so that the HRTF synthesized by the invention is clearer in theory and the results of linear regression are more accurate for each frequency band respectively.

The invention relates to a device and method for adjusting laser light spot size and positioning target materials. A clamp used for clamping a piece of photographic paper is placed on a lifting platform, the lifting platform is mounted on an X-Y motion workbench, the X-Y motion workbench is positioned at the base of a multi-threaded hole workbench, a servo motor is in driving connection with the X-Y motion workbench and the lifting platform, a light path system is arranged on the output optical path of an optical laser, the output end of the light path system is arranged directly facing the photographic paper clamped by the clamp, a photoelectric sensor used for receiving optical signals is further arranged at the optical path output end of the optical laser, the photoelectric sensor is connected to an industrial computer, and the industrial computer is in control connection with the servo motor. Dispersed spots are formed on the photographic paper by using the effect of laser shock waves, so that precision measurement is performed, and approximating to required light spot size is achieved step by step; a thin film is used for positioning target materials; dimensions of the dispersed spots measured are used for approximating the required spot sizes.

The invention relates to a super-resolution image reconstruction method based on multiple out-of-focus images. The super-resolution image reconstruction method based on multiple out-of-focus images includes the steps: selecting one original resolution sharp image I and n original resolution out-of-focus images Gj; calculating the pre-estimated high solution image Xo of I; utilizing a particle swarm iteration algorithm to estimate the pre-estimated fuzzy radius Rj and the pre-estimated point spread function hj, and performing combined reconstruction on Xo by means of the compression perception technology and according to Gj so as to obtain the current high solution image Xt; taking Xt as the basis of the iterative computation high solution image X; taking Rj and hj as the initial values, and utilizing the particle swarm iteration algorithm to solve the fuzzy radius Rj and the point spread function hj; and performing combined reconstruction on the image X by combination with n images Gj by means of the compression perception technology and according to the point spread function hj, so as to obtain the super-resolution image M. The super-resolution image reconstruction method based on multiple out-of-focus images can perform blind reconstruction on the unknown point spread function, is simple in the algorithm and is high in the operation speed.

The invention relates to an air conditioner control technology, and provides a control method for overmodulation of a variable frequency motor, and the control method is used for solving the problems that a vector control method is quite high in calculated amount and control errors are prone to occurring. Firstly, the duty ratio is calculated out by a system according to the fundamental current amplitude of reference voltage and DC bus voltage values, secondly, the normalization value of control voltage on DC bus voltage is calculated out by the system according to the control voltage and the DC bus voltage, then, the correspondence of the duty ratio and the normalization value is set up by the system and stored, and finally, three-phase voltage control time is calculated out by the system to control operation of the motor according to the correspondence of the duty ratio and the normalization value. A vector control technical framework, especially a linear region modulation control and overmodulation control technical framework is rebuilt from a brand new angle, action time of the zero vector and the like does not need to be calculated, a calculating method is simplified, and calculating time is shortened. The control method is suitable for overmodulation control over the variable frequency motor.

The invention discloses a rotating machine fault prediction method and system based on a health index and particle filtering. The method comprises the following steps: firstly, extracting an appropriate health index on the basis of multi-feature evaluation; then, mining an abnormal sample based on the abnormal change of the health index amplitude; based on the periodic characteristic of the rotating machine fault, the fast spectral kurtosis-multipoint optimal minimum entropy deconvolution is utilized to realize early fault characteristic enhancement, approach to an early fault occurrence node and determine a residual service life prediction starting point, and more samples with fault information are provided for subsequent residual service life prediction; and finally, based on a particle filtering method, realizing probability prediction of the residual service life of the rotating machine. The fault prediction method provided by the invention has the advantages of simple theory, relatively high feasibility, relatively high result confidence and the like, and can be suitable for fault prediction under the confidence interval of the rotating machinery.

The invention relates to a state space analysis method of a power regulating system for a nuclear power station pile. The method comprises the following steps of: establishing a mathematical model of the power regulating system for the nuclear power station pile, performing mathematical modeling on each part of the system, establishing a mathematical model of the regulating system, and establishing generalized controlled object mathematical model; converting a generalized transfer function equation in the generalized controlled object mathematical model into a state space model, judging the controllability of the system, configuring a closed loop system desired extreme point, and constructing a system state feedback matrix; and if a zero point occurs in the generalized controlled object mathematical model, adding a PID (Proportion Integration Differentiation) feedback loop on the basis of a state space model, and adopting a state feedback-PID composite control structure. The method has the advantages of effective suppression of the control quantity of a pile power system, high tracking regulating performance, high robustness, certain anti-jamming capability, general significance, wide application range and ideal control effect, and a novel thought is provided for the control specific to complex control objects with zero points.

The present invention discloses a method for measuring an actual temperature of a flame by using all information of a radiation spectrum and a measurement system thereof. The method includes: conducting more theoretical data processing by using energy level structure correction, wherein all information of the radiation spectrum can be used; and by way of a keyboard input manner or a data transmission input manner, acquiring an energy level structure correction parameter, and finally acquiring a more accurate actual temperature value of a measured flame. The method effectively overcomes a defect that the true temperature of the flame can be obtained by only conducting radiance correction through data processing with great calculations when adpted multi-spectral temperature measurement method. In the existing multi-spectral temperature measurement method at present, only information of several monochromatic radiation capacities in the radiation spectrum can be used; and in the method, information of all the monochromatic radiation capacities, thousands of monochromatic radiation capacities in general, in the radiation spectrum can be used.

The invention discloses a method for monitoring three-dimensional deformation of a coal mining area by utilizing an unmanned aerial vehicle image. The method comprises the following steps: estimatinga coal mining ground surface influence area; registering the two time phase unmanned aerial vehicle images I1 and I2; after registration, extracting homonymy points from the unmanned aerial vehicle image corresponding to the coal mining surface influence area, and eliminating mismatching point pairs; according to the extracted homonymy points, determining horizontal movement of the earth surface between two times, and performing spatial interpolation to obtain continuous horizontal movement in an image space; calculating a surface subsidence value between two time phases according to the extracted horizontal movement in combination with a relationship between subsidence and horizontal movement in a coal mining subsidence model; reprojecting the horizontal movement to the direction paralleland perpendicular to the mining trend direction, and fusing the horizontal movement and the subsidence value to obtain the three-dimensional deformation value of the earth surface. According to the invention, three-dimensional deformation monitoring of the coal mine area is realized by using the multi-temporal unmanned aerial vehicle images, the problem of dependence of image-based mining area deformation monitoring on SAR images is solved, and the effect of monitoring three-dimensional deformation of the coal mine area is good.