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49 results about "Trajectory method" patented technology
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Trajectory Methods. Basically, trajectory methods consist of measuring the horizontal and vertical coordinates of a point in the jet issuing from the end of a pipe (Stock, 1955). The pipe may be oriented either vertically or horizontally.
Ballistic trajectory simulation method and flight simulation method for golf ball
InactiveUS20070010342A1Efficient developmentShorten the timeAerodynamic testingDesign optimisation/simulationEngineeringGolf Ball
A ballistic trajectory method for a golf ball is disclosed wherein a ballistic trajectory of a golf ball having a plurality of dimples formed on the surface thereof when the golf ball is hit to fly at an arbitrary number of rotations and an arbitrary initial speed can be estimated and ballistic trajectory and flight characteristics of the golf ball can be evaluated without depending upon experimental evaluation which is based on an actual model thereby to allow a golf ball to be developed efficiently. The ballistic trajectory of the golf ball when the golf ball is hit to fly is estimated by successively calculating the flight distance and the height of the ball after every lapse of a very short period of time after the ball is hit to fly until it drops to the ground making use of arithmetic operation by a computer.
Owner:BRIDGESTONE SPORTS
Method and system for recognizing behaviors in videos on basis of visual-semantic features
InactiveCN108647591AAvoid high computational complexityReduce computational complexityCharacter and pattern recognitionNeural architecturesComputation complexitySemantic feature
The invention discloses a method for recognizing behaviors in videos on basis of visual-semantic features. The method comprises the following steps of: firstly extracting short-term spatial-temporal visual features by utilizing a three-dimensional convolutional neural network, so as to avoid the high calculation complexity caused by a light stream or intensive trajectory method; extracting semantic and spatial position information of a person and an object by utilizing a convolutional neural network-based object detector, constructing person-object spatial position features, fusing the person-object spatial position features with the spatial-temporal visual features, and improving the recognition correctness for interaction behaviors in a video by utilizing extra semantic information; andfinally, on the basis of the extracted short-term spatial-temporal visual features with universality, extracting specific long-term behavior features through a recurrent neural network so as to improve the behavior recognition correctness. The method is capable of solving the technical problem that existing video-oriented behavior recognition methods are high in calculation complexity and low in behavior recognition correctness and cannot extract long-term behavior features which run through the whole video time dimensionality.
Owner:CHANGSHA UNIVERSITY
C-arm device with adjustable detector offset for cone beam imaging involving partial circle scan trajectories
InactiveUS20050265523A1Small sizeAvoid problems2D-image generationComputerised tomographsX-rayPhysics
Owner:SIEMENS MEDICAL SOLUTIONS USA INC
Automatic parallel parking path planning method based on two sections of second-order Bezier curves
ActiveCN110949374AReduced starting pose requirementsReduce the difficulty of correctionControl devicesSimulationObstacle avoidance
The invention discloses an automatic parallel parking path planning method based on two sections of second-order Bezier curves. The method comprises the steps of obtaining target parking space information to determine a parking target position and establishing a global coordinate system by taking the parking target position as an original point; constructing a parking trajectory segmentation judgment model to determine the number of planned trajectory segments, planning the end position range of the first section of trajectory, determining the start point, the end point and the control point of each section of planned trajectory, performing path planning by using a second-order Bezier curve, performing monitoring at set intervals, and adjusting the planned trajectory by using a dynamic adjustment planning trajectory method. According to the method, the requirement for the initial pose of the to-be-parked vehicle is lowered, and the environmental adaptability of the path planning methodis improved; the vehicle can be driven into the planned area manually through simple adjustment, so that the cost is reduced, and the method can be applied to medium and low-grade vehicles; control points of parking trajectory planning are easy to determine, a trajectory generation algorithm is simple, and the path curvature is continuous. The correction difficulty of the track error is reduced,and the obstacle avoidance performance and parking efficiency of the vehicle are improved.
Owner:JIANGSU UNIV
Systems and Methods for Behaviour Understanding from Trajectories
Methods are provided for automatically analyzing and understanding activities and interactions. One method comprises receiving at least location information for one or more individual objects in a scene at a given time; applying at least one machine learning or artificial intelligence technique to automatically learn an informative representation of location trajectory data for each object; and identifying and analyzing individual and group activities in the scene based on the trajectory data. Another method comprises receiving at least location information for one or more individual objects in a scene at a given time; receiving visual information about the scene and at least one individual object in the scene; applying at least one machine learning or artificial intelligence technique to automatically learn an informative representation of location trajectory data, and to automatically learn an informative representation of visual appearance data; and combining the location trajectory and visual appearance data.
Owner:SPORTLOGIQ
Computing a similarity measure over moving object trajectories
InactiveUS20150039217A1Instruments for road network navigationNavigational calculation instrumentsComputer graphics (images)Spacetime
Owner:IBM CORP
Ballistic trajectory simulation method and flight simulation method for golf ball
InactiveUS7435089B2Efficient developmentShorten the timeAerodynamic testingDesign optimisation/simulationEngineeringGolf Ball
A ballistic trajectory method for a golf ball is disclosed wherein a ballistic trajectory of a golf ball having a plurality of dimples formed on the surface thereof when the golf ball is hit to fly at an arbitrary number of rotations and an arbitrary initial speed can be estimated and ballistic trajectory and flight characteristics of the golf ball can be evaluated without depending upon experimental evaluation which is based on an actual model thereby to allow a golf ball to be developed efficiently. The ballistic trajectory of the golf ball when the golf ball is hit to fly is estimated by successively calculating the flight distance and the height of the ball after every lapse of a very short period of time after the ball is hit to fly until it drops to the ground making use of arithmetic operation by a computer.
Owner:BRIDGESTONE SPORTS
Novel online fault diagnosis method for high-voltage XLPE cable
The invention discloses a novel online fault diagnosis method for a 110kV XLPE cross interconnection cable, namely a trajectory method. According to the method disclosed by the invention, cable metal sheath grounding wire loop current and operating voltage parameters are acquired through an online monitoring system, the parameters are transmitted to a computer, and a trajectory diagram integrating the two types of parameters in the same time period is constructed. Any fault corresponds to a different trajectory diagram, and differences between the trajectory diagram and normal conditions are analyzed and compared by using digital image processing technologies so as to carry out fault diagnosis accurately. The fault diagnosis method disclosed by the invention can overcome deficiencies of a traditional online monitoring and fault diagnosis method, is higher in accuracy and lower in cost, can realize real-time diagnosis, and can form a historical fault trajectory database.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Double-ring guidance method of skip re-entry
ActiveCN104843197AOvercome the difficulties that cannot meet the design requirementsHigh control precisionSpacecraft guiding apparatusRe entryComputer science
The invention relates to a double-ring guidance method of skip re-entry, and belongs to the field of the guidance of the re-entry of aircrafts. According to the double-ring guidance method disclosed by the invention, the control precision of the guidance method to terminal distribution is improved by utilizing the prediction-correction executed by slow guidance tasks, and the problem that the control demand of high precision of skip re-entry is difficult to satisfy by only using the standard trajectory method is solved. According to the double-ring guidance method disclosed by the invention, the problem that the control precision of fall points is reduced by only using a prediction guidance method after the navigation precision deteriorates under large dynamic conditions is solved by utilizing a standard trajectory tracking method executed by fast guidance tasks. The prediction-correction executed by slow guidance in the double-ring guidance scheme disclosed by the invention solves the problem of the control precision of the secondary re-entry section under the conditions of initial large distribution.
Owner:BEIJING INST OF CONTROL ENG
Systems and methods of calculating electron dynamics using spin-dependent quantum trajectories
InactiveUS20100318331A1Computation using non-denominational number representationDesign optimisation/simulationDirac equationSteady state
Methods and systems for calculating electron or ion dynamics using spin-dependent quantum trajectories are disclosed. According to one exemplary embodiment of the present invention, electron or ion dynamics are obtained by solving a set of equations for electrons' motion using spin-dependent quantum trajectories calculated from electron current with one equation for each electron in the atomic structure of a material of interest. The set of equations is time-dependent Schrödinger or Dirac equations for the nonrelativistic and relativistic regime, respectively. The electron current contains a set of spin-dependent terms that guarantee Fermi-Dirac statistics are obeyed. Steady state solution of the set of equations for electrons' motion is a set of wave functions in a three-dimensional space and in time. The spin-dependent quantum trajectories for each of the electrons are updated at each solution cycle, and therefore, mean-field approximation is avoided.
Owner:LIVERMORE SOFTWARE TECH
On-line fault diagnosis method for 110kV cross-linked polyethylene cross-connected cable based on trajectory method
The invention discloses an on-line fault diagnosis method for a 110kV cross-linked polyethylene cross-connected cable based on a trajectory method, namely, a trajectory method formed by induction voltage and metal sheath grounding loop current measurement parameters. The on-line fault diagnosis method comprises the steps of collecting metal sheath grounding loop current and induction voltage parameters of the cable through an on-line monitoring system, transmitting the parameters to the MATLAB through a serial port, constructing a trajectory diagram integrating the two types of parameters within the same time period by using a fitting code, solving the parameters such as the long axis, the short axis, the area and the inclination angle, analytically comparing the difference between the trajectory diagram and a normal condition, and analyzing the change rate of the long axis, the short axis, the inclination angle and the eccentricity so as to accurately perform fault diagnosis. The method disclosed by the invention can overcome defects of the traditional on-line monitoring and fault diagnosis method, is higher in accuracy, can realize real-time diagnosis and can form a historical fault trajectory database. According to an online detection method for the induction voltage, the line adopts a cross-connected grounding mode, and measurement is performed at two ends of a sheath protector of a line cross-connected grounding box.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method for analyzing trajectory accuracy of industrial robot based on continuous dynamic time warping
ActiveCN112549019AImprove accuracyAvoid the problem of mapping errorsProgramme-controlled manipulatorDynamic planningIndustrial robotics
The invention discloses a method for analyzing trajectory accuracy of an industrial robot based on continuous dynamic time warping. The method comprises the following steps of searching for optimal matching points in two sequences step by step based on the idea of dynamic planning; defining a cumulative distance matrix D as a similarity measurement value of two trajectory sequences; and conductinginterpolation on the two sequences, enabling a regular path to meet a certain optimization strategy to enable the cumulative distance to be minimum, and searching from back to front through a backtracking method to enable the accumulated distance of the two sequences to be minimum. According to the method, a CDTW algorithm is adopted, and mapping between trajectory points is analyzed, so that theproblems that during non-linear trajectory method plane construction, due to the influences of the movement speed and movement deviation of a robot and the sampling frequency and measurement error ofa measurement system, mapping errors occur between an instruction trajectory and actual trajectory points, and large trajectory measurement errors are caused are solved. By measuring and analyzing the trajectory accuracy of the industrial robot, the problem of mapping errors in a standard method can be effectively avoided, and the trajectory accuracy is improved.
Owner:BEIJING UNIV OF TECH
Lamb wave damage positioning method based on elliptic probability and Bayesian estimation
ActiveCN110376282AReduce uncertaintyImprove robustnessMathematical modelsAnalysing solids using sonic/ultrasonic/infrasonic wavesCorrelation coefficientPattern recognition
The invention discloses a Lamb wave damage positioning method based on the elliptic probability and Bayesian estimation. The method comprises the following steps: S1, according to an elliptic trajectory method and a probabilistic damage reconstruction method, carrying out imaging and positioning on a damage by combining Bayesian estimation with an arrival time feature value and a correlation coefficient feature value; S2, on the basis of the elliptical trajectory method and the probabilistic damage reconstruction method, carrying out advantage complementing on non-linear path detection of theelliptical trajectory method and linear path detection of the probability damage reconstruction; and S3, constructing a likelihood function based on the elliptic trajectory method of the arrival timefeature value, constructing prior information based on a probabilistic damage reconstruction method of the correlation coefficient feature value, and carrying out damage positioning by posterior distribution of the position parameters. Therefore, problems that the sensitivity of the damage detection of the non-direct path and direct path can not be considered simultaneously because of many sensors, the uncertainty of damage location is high, and the robustness of positioning is low in the prior art are solved.
Owner:BEIHANG UNIV +1
Support vector regression machine fusion-based expressway road section mean velocity estimation method
ActiveCN107180534AHigh practical valueHigh precisionDetection of traffic movementCorrection algorithmWeighted average method
The invention discloses a support vector regression machine fusion-based expressway road section mean velocity estimation method. The method includes the following steps that: 1) an expressway to be researched is selected, and basic data are obtained; 2) a road section mean velocity is obtained through using a trajectory method-based correction algorithm and according to fee charging data; 3) passenger service vehicles and hazardous article transport vehicles of which the single operating mileage exceeds 800 kilometers are adopted as floating vehicles, a road section mean velocity is obtained through using a speed-time integral model and a weighted average method; and 4) a support vector regression machine fusion algorithm is adopted to fuse the two road section mean velocities, so that a support vector regression machine fusion-based expressway road section mean velocity can be obtained. According to the support vector regression machine fusion-based expressway road section mean velocity estimation method of the invention, expressway road section fee charging data and Beidou satellite positioning system data about the passenger service vehicles and hazardous article transport vehicles of which the single operating mileage exceeds 800 kilometers are combined, the fused road section mean velocity is obtained through the support vector regression machine method, and therefore, the accuracy of velocity estimation is improved, the daily monitoring and emergency disposal of expressway managers can be benefitted, and the operational efficiency of expressways can be effectively improved.
Owner:SOUTH CHINA UNIV OF TECH
Frequency error measuring method and frequency error measuring device
InactiveUS6782045B1Spectral/fourier analysisAutomatic frequency control detailsMeasurement deviceFrequency spectrum
In a frequency spectrum analyzer (2) which receives a modulation signal previously measures the frequency (F). A synchronous detection frequency (B) is determined on the basis of the frequency (F). An adder (7) obtains the difference (G) between the synchronous detection frequency (B) and the reference frequency (C). From an I signal and a Q signal which are obtained by performing synchronous detection by using the synchronous detection frequency (B), a frequency error detector (6) obtains a frequency error (E) by the phase trajectory method. An adder (8) adds the difference (G) and the frequency error (E) to obtain a frequency error.
Owner:YOKOGAWA ELECTRIC CORP
Pollution tracing method and device
InactiveCN112988940AFine focusData processing applicationsTechnology managementEmission inventoryData set
The invention discloses a pollution tracing method and device. The method comprises the following steps: inputting air quality forecast data into an air mass trajectory tracing model, and calculating to obtain backward diffusion trajectories of a point location selected at a preset moment at different heights after a preset duration; extracting longitude and latitude data sets of all heights on the backward diffusion trajectory, and drawing trajectory lines according to all the heights and the corresponding longitude and latitude data sets; and according to the emission height and position information of each pollution source obtained by the pollution source emission list and / or the pollution source general survey, screening out the pollution source of which the distance from the drawn trajectory is smaller than a preset length, and obtaining the pollution source emission information around the trajectory. The device comprises a diffusion track calculation unit, a track line drawing unit and a pollution source screening unit. According to the method and the device, respective advantages of a backward trajectory method and a pollution source information method are combined, results are associated, pollution source tracing results are further finely and scientifically focused, and guidance and direction are provided for subsequent pollution prevention and control work.
Owner:3CLEAR SCI & TECH CO LTD +1
Image reconstruction for a general circle-plus trajectory
InactiveUS7848479B1Reconstruction from projectionMaterial analysis using wave/particle radiationBack projectionFilter back projection
Methods, apparatus and systems for an exact filtered back projection process for circle-plus trajectories, which consist of two components: C and L. The first component C, is analogous to a circle in the traditional circle-plus trajectories, is any closed (not necessarily planar) continuous curve. The second component L is almost any continuous curve. The only condition is that L starts below C and ends above C. The process does not depend on the global properties of L. When the source is located on L, one needs to know only how C projects onto the corresponding detector and the properties of L in the immediate neighborhood of the source position. The present invention is especially convenient for the traditional circle-plus trajectories, which are implemented using a gantry and moving table by obtaining a universal FBP algorithm, which is independent of table movement during the scan as long as the condition on L is satisfied.
Owner:UNIV OF CENT FLORIDA RES FOUND INC
Computing a similarity measure over moving object trajectories
InactiveUS9747805B2Instruments for road network navigationNavigational calculation instrumentsComputer graphics (images)Spacetime
Owner:IBM CORP
Interpolated just-in-time seek trajectories
InactiveUS7602581B2Record information storageAlignment for track following on disksHard disc driveEngineering
Owner:WESTERN DIGITAL TECH INC
System and method for monitoring conformance of an aircraft to a reference 4-dimensional trajectory
ActiveUS20190180631A1Simplified descriptionMultiple aircraft traffic managementAircraft navigation/guiding aidsFlight vehicleLongitude
Methods and systems are provided for monitoring conformance of an aircraft to an actual and predicted 4-dimensional (4D) trajectory with respect to a reference business trajectory (RBT). First, a flight plan for the aircraft is acquired from an onboard flight management system (FMS) computer. A predicted flight trajectory is generated based on the latitude, longitude, altitude, speed and time of the flight plan for the aircraft. An onboard trajectory conformance monitor that is independent of the FMS computer, monitors the present flight trajectory of the aircraft and anticipates any actual or future deviations from the RBT. The trajectory conformance monitor will generate an advisory of any actual or anticipated deviations from the RBT.
Owner:HONEYWELL INT INC
Control method for utilizing standard trajectory to deal with multiple return conditions
ActiveCN104571125AInjection adjustment is smallGuaranteed reliabilityPosition/course control in three dimensionsEngineeringMarine navigation
The invention discloses a control method for utilizing a standard trajectory to deal with multiple return conditions. The control method comprises the following steps: firstly, computing a novel required longitudinal flying range and a transverse flying range under a reentry coordinate system; computing a longitudinal flying range adjustment amount and a transverse flying range adjustment amount; computing a trajectory variable parameter A and a trajectory variable parameter B; utilizing the trajectory variable parameters to perform linear transformation on independent variables, to the guidance law, of a standard trajectory, and performing translation transformation on the computed longitudinal flying range and the transverse flying range for navigation; at last using the independent variables, to the guidance law, of the standard trajectory after the linear transformation, and the computed longitudinal flying range and the transverse flying range for navigation after the translation transformation to perform standard trajectory method guidance computing. According to the control method disclosed by the invention, the standard trajectory is not required to be changed, the reentry requirement of various reentry initial terminal condition changes (particularly longitudinal flying range change) can be met; meanwhile, the terminal state control precision cannot be damaged; the task flexibility and the terminal control index requirement can be met to the largest extent.
Owner:BEIJING INST OF CONTROL ENG
System and method for monitoring conformance of an aircraft to a reference 4-dimensional trajectory
ActiveUS10573186B2Multiple aircraft traffic managementRadio wave reradiation/reflectionFlight vehicleFlight management system
Methods and systems are provided for monitoring conformance of an aircraft to an actual and predicted 4-dimensional (4D) trajectory with respect to a reference business trajectory (RBT). First, a flight plan for the aircraft is acquired from an onboard flight management system (FMS) computer. A predicted flight trajectory is generated based on the latitude, longitude, altitude, speed and time of the flight plan for the aircraft. An onboard trajectory conformance monitor that is independent of the FMS computer, monitors the present flight trajectory of the aircraft and anticipates any actual or future deviations from the RBT. The trajectory conformance monitor will generate an advisory of any actual or anticipated deviations from the RBT.
Owner:HONEYWELL INT INC
Pollution tracing method and device
ActiveCN114661849AFine focusData processing applicationsTechnology managementEmission inventoryData set
Owner:辽宁省生态环境厅 +2
Method for Estimating the Average Speed of Freeway Sections Based on Support Vector Regression Machine Fusion
ActiveCN107180534BHigh practical valueHigh precisionDetection of traffic movementCorrection algorithmEstimation methods
The invention discloses a support vector regression machine fusion-based expressway road section mean velocity estimation method. The method includes the following steps that: 1) an expressway to be researched is selected, and basic data are obtained; 2) a road section mean velocity is obtained through using a trajectory method-based correction algorithm and according to fee charging data; 3) passenger service vehicles and hazardous article transport vehicles of which the single operating mileage exceeds 800 kilometers are adopted as floating vehicles, a road section mean velocity is obtained through using a speed-time integral model and a weighted average method; and 4) a support vector regression machine fusion algorithm is adopted to fuse the two road section mean velocities, so that a support vector regression machine fusion-based expressway road section mean velocity can be obtained. According to the support vector regression machine fusion-based expressway road section mean velocity estimation method of the invention, expressway road section fee charging data and Beidou satellite positioning system data about the passenger service vehicles and hazardous article transport vehicles of which the single operating mileage exceeds 800 kilometers are combined, the fused road section mean velocity is obtained through the support vector regression machine method, and therefore, the accuracy of velocity estimation is improved, the daily monitoring and emergency disposal of expressway managers can be benefitted, and the operational efficiency of expressways can be effectively improved.
Owner:SOUTH CHINA UNIV OF TECH
Combined high-altitude wind detection method
PendingCN113671598AImprove wind measurement accuracyIndication of weather conditions using multiple variablesSatellite radio beaconingContinuous measurementData stream
The invention relates to a combined high-altitude wind detection method. According to the method, positioning data is selected through a GNSS (Global Navigation Satellite System), the position of a sonde is acquired in real time, high-altitude wind speed measurement, wind direction and wind profile calculation and measurement data processing are conducted on the continuously measured position, and calculating is conducted to obtain high-altitude wind by utilizing a trajectory method; a GNSS navigation positioning module adopts a multi-mode navigation positioning mode, receives a navigation signal sent by a Beidou system, and outputs GNSS positioning data after optimization processing; the navigation parameters and sounding measurement information are transmitted to a sonde mainboard, the sonde mainboard completes data quality processing, signal sampling transformation and data stream generation of meteorological element values and sonde positioning data information through an input module and a gain amplification module, parameters such as a speedometer in an INS navigation positioning module are processed before and after a GNSS, the INS navigation parameters in the missing measurement time period are corrected, and positioning data in the GNSS missing measurement time period is output after processing.
Owner:NAT UNIV OF DEFENSE TECH
Optimal time trajectory planning method for mechanical arm
ActiveCN113334382AFix premature convergenceSolve Oscillation ProblemsProgramme-controlled manipulatorLearning factorLocal optimum
The invention provides an optimal time trajectory planning method for a mechanical arm. According to the method, under the condition that multiple constraint conditions such as the speed, the acceleration and the jump value of the mechanical arm are considered, the inertia weight and the learning factor in a particle swarm are improved, and the defect that the particle swarm is prone to convergence, so that a local optimal solution is obtained is overcome. Meanwhile, a 3-5-3 polynomial interpolation trajectory method is adopted, so that the algorithm is simple in structure, parameters are easy to adjust, and the defects that the polynomial is high in order, has no convex hull property and the like are overcome. According to the optimal time trajectory planning method, the particle swarm optimization is improved, so that the operation time of the mechanical arm is shortened, and smooth and stable joint position, speed and acceleration curves are obtained.
Owner:SHANGHAI INST OF TECH
A Calculation Method of Stereographic Intersection Angle of Satellite Imagery
ActiveCN103390102BSimple methodShorten acquisition cycleSpecial data processing applicationsSocial benefitsArea network
The invention belongs to the technical field of space-to-ground observation, and particularly discloses a method for calculating a three-dimensional intersection angle of satellite images. The method comprises the following steps of A, acquiring image point coordinates of same-name points of a three-dimensional satellite image pair by using a manual measurement or automatic satellite image matching method; B, implementing an RFM (rational function model)-based area network compensation method by utilizing the coordinates of the same-name points of the satellite images to realize the optimization of RPC (rational polynomial coefficient) parameters; C, calculating spatial rectangular coordinates corresponding to object-space points formed by projecting the same-name points onto projection surfaces at different elevations by using a projection trajectory method to finish the spatial reconstruction of same-name light; and D, calculating the three-dimensional intersection angle of the same-name light by utilizing direction vectors of the reconstructed same-name light. The method is applied to the calculation of the three-dimensional intersection angle of any three-dimensional model formed by overlapped satellite images without any ground control point, can be used for the mapping accuracy evaluation of the three-dimensional model, and has remarkable economic and social benefits.
Owner:CCCC SECOND HIGHWAY CONSULTANTS CO LTD
A method and system for collecting action trajectories of special people based on decision tree
ActiveCN113688200BMaster the communication dynamics in real timeAchieve full coverageEpidemiological alert systemsForecastingPaymentCrowds
The invention discloses a method for collecting action tracks of special people based on a decision tree, wherein the method includes: obtaining the first special user; obtaining the client payment information of the first special user; obtaining the first node payment information and The second node payment information; obtain the first distance information, the first location distribution information and the first traffic flow information between the first node and the second node; respectively use the first distance information as the first trajectory prediction feature, the The first position distribution information is used as the second trajectory prediction feature, and the first traffic flow information is used as the third trajectory prediction feature; the action trajectory prediction collection decision tree of the first special user is constructed; the first special user is carried out Trajectories are predicted and collected. It solves the technical problem in the existing technology that it is impossible to combine the decision tree algorithm to comprehensively and accurately track the action trajectory of special groups of people, making the statistical data incomplete, and then affecting the decision-making release.
Owner:NANTONG ZHIDA INFORMATION TECH CO LTD +1
A system and method for calculating the operating area of agricultural machinery field in dual algorithm mode
InactiveCN103673937BEasy to calculateAccurate calculationTransmission systemsSatellite radio beaconingDriver/operatorDual mode
The present invention relates to a system and method for calculating the field operation area of agricultural machinery in a dual algorithm mode, which includes a vehicle-mounted terminal device and a server module; the vehicle-mounted terminal device is provided with: a device for locating the position of the agricultural machine during operation GPS module, the GPRS module that sends the location data and the corresponding time of each location point to the server module through the wireless network and receives the calculation result of the server, and is used to control the GPS and GPRS module, control the display results, and control the storage and call of historical data The device; the GPS module, the GPRS module and the display are all connected to the controller, and the GPRS module communicates with the server through the GPRS wireless network; the server module is responsible for calculating related results. The present invention simultaneously uses two algorithms, the finite element method and the trajectory method, to calculate the actual land area of the farmland operation area and the area that the agricultural machine itself travels in the operation area, and to provide the required operation according to the measured area. At the same time, the results of the driving trajectory are saved in the form of pictures, which is convenient for agricultural machinery drivers and farmers to understand the detailed driving conditions.
Owner:吴晓伟 +1
A method to describe the relationship between horizontal well trajectory and formation
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
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