Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

354results about How to "High accuracy of results" patented technology

Method for obtaining resident travel characteristic parameter based on mobile phone positioning data

The invention discloses a method for obtaining a resident travel characteristic parameter based on mobile phone positioning data. The method comprises the following steps of: (1) collecting mobile phone positioning data; (2) filtering the mobile phone positioning data, matching the mobile phone positioning data to traffic zones, and obtaining the matched mobile phone positioning data; (3) using users as units, ordering the matched mobile phone positioning data in one day by time, merging the continuous data in the same one traffic zone into one piece, and obtaining mobile phone positioning pretreatment data; (4) according to the number of emerged pieces and influence duration, judging residing points, restoring a travel path between two residing points, and obtaining the travel distance and the travel speed, and then obtaining a travel log table of all users; (5) on the basis of the matched mobile phone positioning data, statistically obtaining a place of residence and workplace result table; and (6) and conjointly analyzing the travel log table and the place of residence and workplace result table, and obtaining resident travel characteristic parameters. The method has the characteristics of low cost, large sample quantity, high precision and high time validity.
Owner:北京交通发展研究院

Laser radar road reconstruction and expansion exploratory survey design method

The invention discloses a laser radar road reconstruction and expansion exploratory survey design method. The method comprises the steps of A designing a result coordinate benchmark, measuring basic control and measuring pavement control points; B determining parameters including the data density, acquisition route and the like, and acquiring vehicle laser radar data along a main road and a ramp; C determining parameters including the data density, flight design and the like, and acquiring airborne laser radar data according to a designed flight strip; D realizing laser radar data fusion by refining laser point cloud plane coordinates and elevation coordinates and refining track line data; E acquiring characteristics of road traffic lane lines by using point cloud intensity information, and realizing extraction of characteristic lines of road pavements, protection and the like by adopting a method of projecting three-dimensional point clouds to a two-dimensional plane; F recovering planar elements and longitudinal surface elements of an existing road; G producing a DEM (digital elevation model), a DOM (digital orthophoto map) and a DLG (digital line graphic); H collaboratively designing laser radar measurement and road reconstruction and expansion CAD (computer-aided design), designing flat, longitudinal and transverse cross sections of a road, comparing and selecting schemes, and outputting final design drawings and charts.
Owner:CCCC SECOND HIGHWAY CONSULTANTS CO LTD

Measurement method and measurement apparatus for bioelectric impedance and health management guideline advising apparatus comprising the measurement apparatus

The present invention aims to measure easily and accurately information about the panniculus (such as fatty layer, muscular layer, osseous layer) in the depth direction below the surface of a living body. To achieve this object, in an embodiment of the invention, a pair of current-carrying electrodes 1a, 1b and a pair of measuring electrodes 2a, 2b are rectilinearly arranged on the surface of the living body so that the measuring electrode 2a within a small area is placed very close to the current-carrying electrode 1a with small area. While constant current from a radio frequency current source 3 flows between the current-carrying electrodes 1a, 1b, the voltage between the measuring electrodes 2a, 2b is measured by the detector 4. The potential of the measuring electrode 2a is almost equal to the potential at the contact position P3 of the current-carrying electrode 1a, and the potential of the measuring electrode 2b is almost equal to the potential at the deepest position P1 of the vertical part 5c inside the living body 5. Therefore, the potential difference between the upper and lower ends of the vertical part 5c. The bioelectical impedance Zv of the vertical part 5c is calculated from the potential difference and the current i.
Owner:PHYSION

Text detection and recognition method combining character level classification and character string level classification

The invention discloses a text detection and recognition method combining character level and character string level classification. According to the method, pixel sets possibly belonging to the same character are extracted from images to form alternate characters; alternate characters which do not meet the geometric feature statistic rule are filtered out; a character level classifier based on the character rotation and dimension invariance features is adopted for classifying the alternate characters, and the probability that the alternate characters are certain characters is determined; the characters are combined two by two, and initial character strings are formed; the similarity between every two character strings is calculated, two character strings with the highest similarity are combined into new character strings until no character strings capable of being combined exist; a character level classifier based on the character string structure feathers is adopted for classifying the character strings to determine the character strings with semanteme; and the probability that character strings to be recognized are certain characters is utilized for recognizing the character strings, and the semantic text is obtained. The text detection and recognition method has the advantages that the text detection and recognition process is used as a whole, the interaction of the text detection and the recognition is utilized for improving the result precision, and simplicity and high efficiency are realized.
Owner:HUAZHONG UNIV OF SCI & TECH

Polarized SAR (synthetic aperture radar) image classification method based on depth PCA (principal component analysis) network and SVM (support vector machine)

The invention discloses a polarized SAR (synthetic aperture radar) image classification method based on a depth PCA (principal component analysis) network and an SVM (support vector machine) classifier. The polarized SAR image classification method includes filtering a polarized SAR image, extracting a shape feature parameter, a scattering feature parameter, a polarization feature parameter and independent elements of a covariance matrix C, and combing and normalizing into new high-dimensional features serving as data to be processed in a next step; according to actual ground feature flags, randomly selecting 10% of data with flags from each type to serve as training samples; whitening the training samples to serve as input to train a first layer of the network, taking a result as input of a second layer to train the second layer of the network, and performing binaryzation and histogram statistics on an output result; taking output of the depth PCA network as a finally learned feature training SVM classifier; whitening test samples, and inputting the test samples into a trained network framework to predict and calculate accuracy; coloring and displaying a classified image and outputting a final result.
Owner:XIDIAN UNIV

Hyperspectral image deep learning classification method and device, equipment and storage medium

The invention relates to the technical field of hyperspectral image classification, and discloses a hyperspectral image deep learning classification method, device and equipment and a storage medium,which are used for improving the accuracy and efficiency of hyperspectral image classification. The method comprises the following steps: acquiring a to-be-classified hyperspectral image; carrying outrandom clipping on a to-be-classified hyperspectral image according to a preset window size and the marked sample set to obtain a to-be-trained sample set; expanding the data set through image transformation to obtain a corresponding deep learning sample set; extracting spatial spectrum features by adopting a convolutional recurrent neural network and a three-dimensional convolutional neural network; and classifying the hyperspectral images through a preset neural network classification model obtained through training to obtain a corresponding image classification result. By constructing thedeep neural network model, the deep abstract features of the hyperspectral image can be automatically extracted, the workload of manual feature extraction and optimization is effectively reduced, andthe end-to-end automatic identification and classification of the hyperspectral image are realized.
Owner:INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI

Process for positioning spatial position of pipe mouth based on vision

The invention proposes a pipe orifice spatial position positioning method based on vision; the positioning method mainly includes the steps: 1) the robot hand-eye relation is calibrated; the calibration and conversion of a plurality of coordinate systems determine the geometrical mapping relation of the 2D pixel coordinates and the three-dimensional spatial scene; 2) the image of the condenser is obtained; the pipe orifice image point set is segmented and the pipe orifice curve is fitted to extract the center image point of each pipe orifice; 3) the depth information is computed and the actual position of the pipe orifice space is further determined according to the image point of the pipe orifice center and the parameters of K, R and t. when the underwater cleaning robot starts the high-pressure water-spraying gun to wash the pipe orifice, the method is adopted to assist the robot in searching and positioning the position of the pipe orifice, so as to enable the robot to realize the automatic positioning of the pipe orifice and finish the washing operation. The method can greatly improve the accuracy in the pipe orifice positioning for the robot, the automation degree of the robot which replaces humans to work, the operational performance and the environmental adaptability of the robot.
Owner:HUNAN UNIV

Method for predicting coke quality through nonlinear optimization coal blending based on coal rock vitrinite total reflectance

ActiveCN102890144AMultiple Intrinsic Indicator ParametersThe prediction method is practicalFuel testingSupport vector machineThermal state
The invention discloses a method for predicting coke quality through nonlinear optimization coal blending based on coal rock vitrinite total reflectance, thereby providing important technical assurance for the improvement of the stability and quality of coke produced by a coke making enterprise. The method provided by the invention comprises the following steps of: establishing a coking coal resource information database, and inputting the caking property index of coking blended coal and the coal rock index of single coking coal into the coking coal resource information database; and establishing a coke quality prediction model through a support vector machine, and then predicting the quality index of the coke according to the coal-quality caking property index level of the coking blended coal, wherein the coal-quality caking property index level comprises two factors, namely the maximum thickness value Y of a gelatinous layer and a caking index value G, and comprises coal rock vitrinite total-component reflectance and the liver-inert ratio of macerals. The method provided by the invention is capable of characterizing the maximum thickness value Y of the gelatinous layer indicating the quantity of metaplast in the softening process of the coking coal and indicating the caking property quality of the metaplast, thereby realizing the prediction process with the goal of predicting the mechanical strength and thermal state performance of the coke.
Owner:UNIV OF SCI & TECH LIAONING

Method and system for production scheduling based on improved particle swarm optimization and heuristic strategy

The invention discloses a method and a system for production scheduling based on improved particle swarm optimization and a heuristic strategy. The method comprises the following steps: proposing constraint conditions; defining an objective function, namely, a fitness function; carrying out particle swarm initialization; randomly initializing swarm particles, including position and velocity; carrying out iterative optimization: updating the velocity and position of particles, and finding out an optimal solution; setting the maximum number of iterations as an iteration termination condition, judging whether the iteration termination condition is satisfied, and outputting a global optimal solution if the iteration termination condition is satisfied; if iteration termination condition is not satisfied, jumping to the previous step to continue to find out an optimal solution. The beneficial effects are as follows: the computing speed of the algorithm is increased by using a novel particle encoding method; the problem of local optimum in the process of the traditional particle swarm optimization algorithm can be solved; the phenomenon of infeasible solutions is avoided to a great extent; and efficient and optimal production scheduling is realized.
Owner:山东万腾电子科技有限公司

Method for performing nonlinear prediction on coke quality on basis of cohesiveness and coal-rock indexes of single coal

ActiveCN102890145AMultiple Intrinsic Indicator ParametersThe prediction method is practicalFuel testingSupport vector machineAir quality index
The invention discloses a method for performing nonlinear prediction on coke quality on the basis of cohesiveness and coal-rock indexes of single coal, which provides important technical guarantee for improving the stability and quality of coke produced by coke making enterprises. The method comprises the following steps of: establishing an information database storing qualities and coke quality indexes of the single coal for coking, and inputting the cohesiveness indexes and the coal-rock indexes of the single coal for coking into the coal information database; establishing a coal quality prediction model, and predicting quality indexes of matched coal by virtue of a clustering and support vector machine; defining the quality indexes of the matched coal, and predicting quality indexes of the coke according to the quality indexes of the single coal; and establishing a model for predicting the crushing strength and abrasive resistance of the coke. The invention further provides a coke quality prediction system with optimized coal blending of coal-rock, which aims to stabilize and improve the coke quality and reduce the coal blending cost, can form a prediction model with multiple parameters and high accuracy for the coal quality indexes and the coke quality indexes, and simultaneously, has a real-time updating function or a manual intervention function.
Owner:UNIV OF SCI & TECH LIAONING

Database based complex-contour aircraft distributed heat environment parameter prediction method

The invention discloses a database based complex-contour aircraft distributed heat environment parameter prediction method and belongs to the field of aircraft heat environment design. The method comprises the steps that an aircraft surface heat flow database is established, order reducing processing is conducted on the database by utilizing a POD method to obtain orthogonal basis vectors of the database, and aircraft surface heat environment parameters can be predicted along a ballistic trajectory by combining with a corresponding basic coefficient interpolation method. The method can really reflect the space distribution characteristics and interference characteristics of the aerodynamic heat environment for all points on the surface of a complex-contour aircraft. Value result comparison shows that the method can remarkably improve the computational efficiency, and prediction precision is not lost. A surface distributed heat flow is provided for calculation of a heat proof temperature field through the points along the ballistic trajectory, more exquisite temperature distribution can be obtained, and accordingly the design level of a whole heat preventing and insulation system is improved.
Owner:BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST +1

Improved method for extracting Fourier transformation infrared spectrum characteristic variable of multi-component gas by aid of TR (Tikhonov regularization)

The invention discloses an improved method for extracting Fourier transformation infrared spectrum characteristic variable of multi-component gas by aid of TR (Tikhonov regularization). The method includes resolving a characteristic variable extracting model into weight sum of the difference of multiple spectral line values; converting an original TR objective function into an objective function based on the model; then adding a bound term of the difference of spectral line positions in the objective function based on the model; realizing optimal functional solution by means of an LASSO (least absolute shrinkage and selection operator) arithmetic based on an Engl's criterion so as to obtain the optimal value of a regressive vector; and obtaining the characteristic variable capable of overcoming interferences caused by spectrum baseline deviation. The accuracy of online multi-component gas analysis results can be improved by the aid of the improved method. The improved method for extracting Fourier transformation infrared spectrum characteristic variable of multi-component gas by aid of TR can be used for multi-component gas quantitative spectrometric analysis application in the fields of gas logging for petroleum and natural gas exploration, quality control and fault diagnosis of products, hardware, chemical engineering and environmental protection.
Owner:XI AN JIAOTONG UNIV

Remote sensing technology-based grassland locust plague progressive prediction method

The invention discloses a remote sensing technology-based grassland locust plague progressive prediction method. According to the method, the distribution of key habitat elements which influencing the development of a grassland locust population is obtained by the means of quantitative remote sensing inversion, meteorological station observation and the like, wherein the key habitat elements subjected to remote sensing inversion comprises land surface temperature, vegetation coverage and soil moisture; the spawning suitability, the incubation suitability and the growth suitability of locusts are analyzed quantitatively by establishing an evaluation model, and a locust plague risk early prediction model is established; a locust plague risk level prediction result is corrected by utilizing the remote sensing observation of an incubation period and a third period and the locust density data measured in the field according to the incubation and development time axes of the locusts, and the situations of a grassland locust plague are predicted progressively. According to the technical scheme provided by the invention, the progressive update of sensitive habitat elements is obtained by performing quantitative inversion on remote sensing data with higher time resolution, so that the prediction precision of a locust plague monitoring and prediction model is improved.
Owner:PEKING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products