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Image acquisition-analysis method

The invention relates to the technical field of image processing and particularly discloses an image acquisition-analysis method. The image acquisition-analysis method includes the steps as follows: step 1. making a plurality of rulers and putting the rulers on every row of supermarket shelf, wherein each ruler is provided with multiple groups of codes; step 2. acquiring images of the shelves on which the rulers are put on; step 3. separating color channels on the collected images and detecting the codes of rulers on the separated channels; step 4. correcting the images according to the detection result of the codes; step 5. dividing out zones including goods in the corrected images according to the detection result on the codes; and step 6. classifying the goods on the zones by utilizingcolor characteristics and local textural characteristics, thus obtaining relevant information of goods arrangement. With the image acquisition-analysis method, the information of the arrangement place, the quantity and the like of the goods on the shelves can be efficiently and correctly obtained. The image acquisition-analysis method is simple, convenient and feasible and saves large amount of manpower and material resources.
Owner:TSINGHUA UNIV

Data processing method and system of data library

The invention discloses a data handling method and a system in database to solve the problem that the single course treatment requires great amount of time and manpower cost and can not handle abnormities in ETL process. The method includes: arrange data synchronous configuration table and data refreshing configuration table; configuration information of the corresponding data source, start up a plurality of synchronous courses in parallel; refreshing grades, and start up a plurality of refreshing courses to make sequential synchronous and refreshing treatment on a plurality of data sources. The invention also includes parallel monitoring treatment; periodically checking synchronous refreshing information table; any abnormity discovered should be recorded in the alarm information table; the invention also includes parallel alarm treatment: Periodically checking alarm information table; alarm information should be sent immediately for new abnormities. The invention enhances the efficiency of synchronization and refreshing and saves a great deal of time and manpower cost. Real-time monitoring ensures timely handling of problems and safe, reasonable, and stable operation of database.
Owner:ALIBABA GRP HLDG LTD

High-precision three-dimensional shape measurement method for jump object

The invention provides a high-precision three-dimensional shape measurement method for a jump object. The method is characterized in that the fringe projection profilometry, in combination with curvelet transform, is applied to three-dimensional shape measurement of the jump object. The fringe profilometry based on structured light projection is a high-precision, quick, noncoherent optical full-field object three-dimensional shape measurement technique, and experimental devices adopted are simple, which mainly include a computer, a projector and a digital camera. The projector is used for projecting a plurality of sets of sine fringe patterns different in frequency to the jump object to be tested; the digital camera is used for recording deformed fringe patterns and transmitting the deformed fringe patterns to the computer, and then the deformed fringe patterns are denoised by virtue of curvelet transform and the phase distribution of the deformed fringes is demodulated in combination with a phase shifting method, and unwrapped phase distribution is obtained by using a phase unwrapping method. At last, three-dimensional data of the jump object is obtained according to a phase-height relation. The high-precision three-dimensional shape measurement method has the major gain that a high-precision fast full-field measurement technique for the three-dimensional shape measurement of the jump object.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Radial artery pulse wave based cardiovascular function parameter detection and analysis method and detection device

The invention relates to a radial artery pulse wave based cardiovascular function parameter detection and analysis method and device. The detection and analysis method is characterized by extracting characteristic information and computing cardiovascular function parameters by analyzing the pulse wave series acquired in real time. In the method, an amplitude characteristic ratios method and a yielding point method are combined to detect and analyze the artery parameters, and when the heart function parameters are detected and analyzed, different ranges are set for the pulse waves corresponding to different templates to search for characteristic points, thus ensuring the method to be rapid and accurate. In the detection method provided by the invention, a pulse clip is used for fixing a pulse sensor and the degree of tightness of the pulse clip is adjusted by a control chip according to the strength of the pulse signals, thus enabling data acquisition to be more rapid and accurate. The detection device is provided with an air adjusting device which ensures that the blood pressure related data can be acquired in the aeration stage, thus accelerating the speed of data acquisition. In addition, a special power source is used for supplying power to the device, thus ensuring the personal safety of the users.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI

Sigmoid function fitting hardware circuit based on Remez approximating algorithm

The invention discloses a sigmoid function fitting hardware circuit based on a Remez approximating algorithm. A sigmoid function fitting method is characterized by including the following steps that (1), the order of a fitting polynomial is determined; (2), a fitting interval of a sigmoid function is obtained; (3), a piecewise interval is obtained; (4), the fitting polynomial is obtained; (5), a coefficient storing module is designed; (6), a polynomial calculation module is designed; (7), a judgment module is designed; (8), the fitting hardware circuit is obtained; (9), a fitting execution interval where operands are located is judged; (10), a coefficient of the fitting polynomial is read; (11), fitting calculation is carried out in the polynomial calculation module. On the basis of reducing hardware resource consumption, the calculation accuracy is improved, the calculation speed is increased, and the flexibility of a calculation structure is promoted.
Owner:黄山市开发投资集团有限公司

EIS rapid measuring method of lithium-ion battery

The invention relates to an EIS rapid measuring method of a lithium-ion battery, and provides an EIS rapid measuring method based on square wave current excitation and Fourier transform. The method includes: selecting a square wave excitation frequency based on an electrochemical reaction characteristic of the lithium-ion battery, determining that the lithium-ion battery is in an appropriate polarized voltage amplitude range, and selecting a sinusoidal alternating current amplitude according to the range; applying a square wave current of a selected frequency point and with a specific amplitude to the lithium-ion battery, performing Fourier transform on the square wave current and a response voltage obtained by sampling, and obtaining the impedance of a specific frequency point; and screening the impedance with a specific frequency based on a frequency spectrum amplitude of Fourier decomposition of the response voltage and an impedance change rule to form the electrochemical impedance spectroscopy of the lithium-ion battery, namely EIS. According to the EIS rapid measuring method, the electrode reaction characteristic of the lithium-ion battery can be accurately described, the EIS of the lithium-ion battery is accurately obtained, the EIS test speed of the lithium-ion battery is fast, the test time is short, and the project is easy to realize.
Owner:BEIJING JIAOTONG UNIV +1

Novel intelligent traffic light control system

The invention provides a novel intelligent type traffic light control system, mainly comprising a camera module, a recognizer, a server and a traffic light controller in-order cascade connection, wherein the recognizer comprises a vehicle detecting module, a flowrate detecting module, a vehicle snapshortting module, a vehicle nameplate recognition module and a vehicle model recognition module; the recognizer counts passing cars by adopting the video virtual coil technology, calculates the vehicle flow rate, recognizes the vehicle model and nameplate based on snapshortted photos and sends other information formed by the vehicle flow rate, the vehicle model and the vehicle nameplate to traffic light time operation module. The invention has the advantages of accurately counting cars, greatly increasing the amount of information acquired, being capable of working out the average waiting time of vehicle and the shortest traffic light time and saving road traffic resources.
Owner:WISESOFT CO LTD +1

Sound source positioning and human face detection-based human body positioning method and system

The invention discloses a sound source positioning and human face detection-based human body positioning method and system. The method includes the following steps that: the distance between a sound source and the positioning system and an included angle beta between the connecting line of the sound source and the positioning system and the current positive direction of the positioning system are obtained; when the wide angle alpha of a color camera and the included angle beta satisfy a relational expression that beta<(alpha / 2-theta), wherein theta is a threshold value when the sound source is entirely located within the visual field of the color camera, and the holder of the positioning system keeps motionless; when the wide angle alpha of the color camera and the included angle beta satisfy a relational expression that beta>(alpha / 2-theta), the rotation angle of the holder of the positioning system is beta, so that the sound source is located at the center of the visual field of the color camera; the color camera acquires images; and whether faces exist in acquired images is analyzed, if faces exist in the acquired images, the sound source is determined as a man-made sound source, and the position information of a human body is determined according to the man-made sound source. With the method and system provided by the technical scheme of the invention adopted, the position information of a positioned person can be obtained fast and accurately, and operation is simple and convenient.
Owner:BEIJING EVOLVER ROBOTICS TECH CO LTD

Static object detecting method and system

Being in use for solving issue that still object cannot be detected precisely currently. The method includes steps: comparing each target foreground (TF) in current image frame with each historical foreground (HF); when determining it is existed that both ratios of crossed area between a TF and a HF to first area of the TF, and to second area of the HF respectively are not smaller than prearranged first threshold value, the method updates parameter value, which is in use for marking a HF is matched; when determining that second area ratio is not smaller than first threshold value, first area ratio is smaller than first threshold value, and crossed area is as area of HF, and the first area ratio is not larger than prearranged second threshold value, the method considers a TF as a HF; ensuring that a HF corresponding matched parameter value reaching to third threshold value is as a still object. The invention also discloses devices and system for detecting still object.
Owner:中星智能系统技术有限公司

Quick search method for target character points of image motion

ActiveCN103226834AReduce computational complexity and time complexityGet quicklyImage analysisEdge detectionTime complexity
The invention provides a quick search method for target character points of image motion. The quick search method comprises the steps as follows: images are decomposed into image blocks; the sum of the absolute values of the gray scale difference of first frame images, second frame images and the image blocks taking pixels as centers in third frame images and the second frame images is calculated; target blocks are marked, edge detection is carried out, optimum angle points are searched; basic matching templates taking the angle points as centers are built up, matching points are searched out, information of the matching points is saved, and the steps are repeated; the new matching points are predicted, and vehicle driving track lines are obtained; and based on the angle point positions recorded in the previous frame, the positions of the matching points of the targets recorded in the current frame are compared with the angle point positions so as to determine whether the vehicle targets are new. Compared with the prior art, the quick search method for the target character points of the image motion can quickly search and track all the vehicle targets in the video range in a matching manner, can obtain tracking trajectory and effective information rapidly and accurately, and can reduce the computation complexity and time complexity.
Owner:CHANGAN UNIV +1

Lithium battery SOC calculation method

ActiveCN104330739AAccurately getDoes not calculate error magnificationElectrical testingElectricityCalculation error
The invention discloses a lithium battery SOC calculation method which comprises the following steps: when system powers on, calibrating SOC to obtain a reference SOC value; during operating, calculating SOC value of a battery pack with the SOC value obtained in the first step being the reference; when the system powers off, storing the current SOC value for providing the reference for the next power on; and when the battery pack is connected with a charger, if the SOC is 0, carrying out available capacity calibration and recording all electric quantity of the battery pack from 0 to charging cut-off as current available capacity of the battery pack and storing the current available capacity, and if charging is interrupted without reaching a cut-off voltage, giving up the available capacity mark this time. Through the method above, the lithium battery SOC calculation method can calculate the available capacity of the battery pack at regular intervals, and the purpose of accurately calculating the SOC value of the battery pack can be realized; amplification of SOC calculation error due to used error is not the case; false electricity phenomenon formed when the SOC is at the tail section does not happen due to reducing of the available capacity; and accurate SOC can still be obtained without calibrating when the battery pack is powered on after keeping for a long time.
Owner:CHANGZHOU GLOBE CO LTD

Calibrating method for randomly placing fringe projection three-dimensional measuring system

The invention provides a calibrating method for randomly placing a fringe projection three-dimensional measuring system. The calibrating method comprises the following steps of: 1, designing a calibrating plate, wherein the calibrating plate is a chessboard pattern with equal intervals; 2, placing the calibrating plate into a measuring system view field for CCD (Charge Coupled Device) camera calibration; 3, placing the chessboard pattern on any different positions in a measurement field, projecting a phase shifting sine fringe pattern to the surface of the chessboard pattern on each placement position, and then collecting images and calculating the distribution phi of an unwrapped phase of each pixel point positioned on the surface of the chessboard pattern and the distance h from the unwrapped phase to a reference surface; 4 establishing three polynomials to express the relationship between the unwrapped phase phi and a height h, between the height h and a horizontal coordinate X and between the height h and a horizontal coordinate Y; 5 converting the horizontal coordinates (X, Y) which are from the unwrapped phase to actual height data and correspond to the height data by utilizing calibrated polynomial coefficient to complete the calibration of the three-dimensional measuring system.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Method for calibrating structural parameters of robot using double-ball-bar

The present invention belongs to the field of robot structural parameter calibration, and discloses a method for calibrating structural parameters of a robot using a double-ball-bar. The method comprises the following steps: (a) mounting a calibration rod and a tool cup, and fixing a calibration baseplate and three central seats; (b) calibrating a tool coordinate system and a user coordinate system, and measuring the lengths of the sides of a triangle BCD using the double-ball-bar; (c) presetting a point A in space to form a spatial tetrahedron with the BCD, and obtaining the coordinates of point A under the user coordinate system according to the lengths of the sides of the tetrahedron; (d) obtaining vector <base>O'6-CO6-Ai through conversion of coordinates of robot joints to base coordinates; (e) measuring the lengths of the lateral sides of the tetrahedron using the double-ball-bar, and obtaining vector <base>aAi*c according to conversion of user coordinates to base coordinates; and (f) obtaining the structural parameters of the robot according to the parallelogram principle. According to the present invention, the calibration of the structural parameters of a six-degree-of-freedom articulated robot using the double-ball-bar is achieved simply and quickly, and the calibration result has high accuracy.
Owner:HUAZHONG UNIV OF SCI & TECH

Parching detecting method and device of atomizing device

The invention provides a parching detecting method and device of an atomizing device. The parching detecting method includes steps of driving an atomizing disc of the atomizing device within a first signal period through driving signals with continuously changing frequency; detecting a first operating current value of the atomizing disc within the first signal period to obtain a first corresponding relation of the first operating current value and the frequency within the signal period; judging whether the atomizing device is parching or not according to the first corresponding relation and a second corresponding relation of a pre-stored second operating current value and frequency or according to the first corresponding relation and an amplitude value of the pre-stored second operating current value, wherein the second operating current value is the operating current value of the atomizing disc within the first signal period under the condition of water. By the parching detecting method and device, parching of the atomizing device is prevented and service life of the atomizing disc is prolonged.
Owner:AUDIOWELL ELECTRONICS GUANGDONG

Beam position design method of inclined geosynchronous orbit synthetic aperture radar

The invention relates to a beam position design method of an inclined geosynchronous orbit synthetic aperture radar, which belongs to the technical field of the synthetic aperture radar, and is characterized in that: by satisfying coherent accumulation time required by system indexes, a range of latitude argument run by a satellite platform is calculated, then influence of earth rotation is considered according to a relative geometric relation between the satellite platform and a target, and information of an echo window of a surveying and mapping zone can be precisely calculated; and then a valid pulse recurrence frequency (PRF) range is calculated according to a substar echo and launching pulse blocking, and a zebra map is drawn. Working parameters are designed within the valid PRF range, the PRF is preferentially selected to satisfy the requirement of the system performance and to complete the beam position design of the geosynchronous orbit synthetic aperture radar (GEO SAR), a minimal slope distance and echo window information of the surveying and mapping zone of the GEO SAR can be more precisely calculated, and the method is particularly suitable for the beam position designof satellite-mounted SAR platforms of an elliptic orbit which cannot ignore omit the earth rotation.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Method, system and equipment for obtaining neology

The present invention discloses a method for getting new word. The method contains the following steps: firstly, the alternative character string is gained from the chart data; and secondly, the alternative character string is filtered according to the preset rule and the filtered words are used as new word. The present invention also discloses a system for getting new word and an instant communication user end and a server which completes the getting of the new word. The present invention has the advantages of easily, effectively and in time automatically getting new word based on the word source of the instant communication, and the new word gotten by the present invention has a boarder service scale.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Performance test device and test method for seawater hydraulic motor under deep-sea high-back-pressure environment

The invention discloses a performance test device and a performance test method for a seawater hydraulic motor under a deep-sea high-back-pressure environment. The performance test device mainly comprises a seawater hydraulic motor test system, a monitoring control system, a deep-sea simulation cabin, a pressure loading system and a circulating water cooling system, wherein the deep-sea simulation cabin provides back pressure required to bear while working under different water-depth environments for performance test of the tested seawater hydraulic motor by virtue of the pressure loading system; test load of the tested seawater hydraulic motor is freely regulated by virtue of a high-pressure flow control valve mounted in the circulating water cooling pipeline; and the circulating water cooling pipeline can effectively avoid rising the water temperature in the cabin due to heat generated by the seawater hydraulic motor operated under load, the motor and the like. The method can simulate the back pressure environment at a set ocean depth and can realize performance test for the seawater hydraulic motor, is simple to operate, easy to realize, not only overcomes the technical difficulty of lowering the seawater hydraulic motor into great-depth deep sea, but also can accurately obtain performance parameters of the seawater hydraulic motor.
Owner:BEIJING UNIV OF TECH

Specific analysis method and device of Internet public sentiment

ActiveCN103186600AAccurately getSolve the problem of getting the topic in a timely and accurate mannerSpecial data processing applicationsThe InternetAnalysis method
The invention provides a specific analysis method of Internet public sentiment. The specific analysis method comprises the steps of: acquiring an Internet public sentiment file; matching the Internet public sentiment file by adopting a preset specific rule; and generating a specific for the successfully matched Internet public sentiment file. The invention also provides a specific analysis device of the Internet public sentiment. The specific analysis device comprises an acquiring module used for acquiring the Internet public sentiment file, a matching module used for matching the Internet public sentiment file by adopting the preset specific rule, and a generating module used for generating the specific for the successfully matched Internet public sentiment file. According to the specific analysis method and device of the Internet public sentiment, the specific is accurately and immediately obtained in massive public sentiment data.
Owner:NEW FOUNDER HLDG DEV LLC +2

Self scheduling flow system with readout as infrastructure

An invention regarding traffic flow management “Fast Lane On Warning” (FLOW) is disclosed whereby individual vehicles are informed and told what speed to go in order to pass through a traffic signal while the light is green. A FLOW (“fast lane on warning”) director sequencer works in conjunction with a traffic signal sequencer (commonly known in the art), both of which have the same service cycle period Pi. The (RGY) type phases and FLOW readout phases are set for each unique particular intersection. While the traffic sequencer controls repeating RGY cycles, the flow director sequencer instructs, generates, transmits repeating cycles of changeable readouts on one or more roadside unit (RSU) emplacements positioned up the road from the traffic signal for one or more lanes in one or more directions. These changing speed assignments or readouts, individually perceived by motorists, guide in motorists such that by the time they pass through the intersection, they will do so while the traffic signal is green, regardless of any random pattern of traffic individual motorists may have been in as they approached the emplacements.
Owner:FREE JAMES JACOB

Method for realizing subtitle overlay screenshot based on deep learning

ActiveCN108347643AImprove accuracyImprove image stitching effectSelective content distributionDeep learningKey frame
The invention discloses a method for realizing subtitle overlay screenshot based on deep learning, and belongs to the field of media technology. The method comprises the following steps: selecting a video interval for subtitle overlay screenshot from a video; locating and cutting out subtitles on each frame of image in the video interval; segmenting all subtitles and extracting key frames in eachsubtitle; performing similarity calculation on the key frames, and performing comparative duplication elimination according to a calculation result to obtain final subtitles; and stitching a first frame of picture in the video interval with the final subtitles in sequence to obtain a subtitle overlay screenshot. The method is low in error rate, high in processing efficiency and high in automationdegree.
Owner:CHENGDU SOBEY DIGITAL TECH CO LTD

Method for acquiring bolted connection bonding surface stress distribution

The invention discloses a method for acquiring bolted connection bonding surface stress distribution. The method is characterized by comprising the steps that a bolted connection structure, all connected pieces and material parameters are tested, and a global cylindrical coordinate system (r,theta,z) and a local cylindrical coordinate system (r,theta,z<j>) are established; the connected pieces are divided into a series of thin layer structures; a state equation is established, and bolt hole boundary characteristic processing is performed, wherein u<(j)>, w<(j)>, tau<(j)><zr> and sigma<(j)><z> are selected to serve as state variables; an input-output variable mapping relation of each thin layer is expressed, and the transmission law of thin layer mechanical characteristics is linearized; input-output mapping transformation is performed on all the thin layers in the bolted connection structure successively; and theoretical analysis data and test data are compared to determine an optimal number of thin layers calculated adaptive to the corresponding structure. Through the method, theoretical and test results of surface pressure distribution can be obtained quickly and accurately, and the optimal number of thin layers can be obtained according to the theoretical and test results.
Owner:DALIAN UNIV OF TECH

Layered sampling testing device for capillary water zone

The invention relates to a layered sampling testing device for a capillary water zone. n unit columns are connected is series and stacked, so that the device is formed; a separation net of each unit column is embedded into a net embedding plate; a sealing groove is a shallow-groove circular ring with the width of about 20mm and the depth of 1mm, and the shallow-groove circular ring is polished along the inner edge of the net embedding plate to the outer edge, and the diameter and the depth of the circular ring are approximately equal to the diameter and the thickness of the separation net; the lower surface of a lower flange, the edges of the sealing groove and the upper surface of the net embedding plate are painted with organic glass cement uniformly, so that a lower flange disk and the net embedding plate are attached together, and the separation net and an organic glass column pipe are fixed closely further; sizes of an upper flange and the lower flange of each unit column are the same with those of the inner diameter and the outer diameter of the net embedding plate, and a lower flange disk of a previous unit column can be stacked on an upper flange disk of a unit column of a next layer in a seamless manner; rib plates are arranged in position of joints of the upper flange disk, the lower flange disk and the organic glass column pipe; and the unit columns are connected through screws in flange screw holes, so that the unit columns are sealed, connected in series and stacked. The device is simple in structure, low in manufacture and maintenance costs, convenient in operation and high in applicability, and can be popularized and applied widely in fields such as civil engineering, geotechnical engineering and the like for physical simulation researches on various rock and earth masses under the action of capillary water.
Owner:NANHUA UNIV

Augmented reality method based on topocentric coordinate system and perspective projection

The invention relates to an augmented reality method based on topocentric coordinate system and perspective projection. The augmented reality method based on the topocentric coordinate system and perspective projection includes that (1) coordinate transformation, to be specific, converting geodetic coordinates of mobile equipment and an interest point into geocentric coordinates to obtain the coordinates of the interest point in the topocentric coordinate system to obtain the perspective coordinates of the interest point; (2) perspective projection, to be specific, perspectively projecting the topocentric coordinates of the interest point relative to the current position of a user to a display screen of the mobile equipment, using a mobile equipment camera to perform location shooting, and overlapping the relevant information of the interest point to the position of the interest point in the scenery shot by the camera of the mobile equipment according to different orientations of the mobile equipment. The augmented reality method based on the topocentric coordinate system and perspective projection overcomes the disadvantage that the traditional map and navigation application are not intuitive; the augmented reality method based on the topocentric coordinate system and perspective projection quickly finds the interest point, and the relevant information of the interest point is timely overlapped to the interest point in the shot image to present the intuitive effect; the augmented reality method based on the topocentric coordinate system and perspective projection automatically prompts the current direction of the user and quickly and precisely obtains the direction and position of the interest point relative to the current position of the user.
Owner:SHANDONG UNIV

Lithium battery SOC and SOP estimation method based on second-order RC model

The invention provides a lithium battery SOC and SOP estimation method based on a second-order RC model, and the method comprises the following steps: S1, selecting the type and model of a lithium battery, obtaining corresponding technical parameters, and building a battery equivalent circuit model; S2, performing an HPPC experiment on the battery at a specific temperature, obtaining battery characteristic parameters, establishing a relationship between battery open-circuit voltage and SOC, performing parameter identification by combining an optimization method, and feeding back the obtained parameters to the model; S3, carrying out SOC closed-loop estimation by combining an EKF algorithm; and S4, estimating the instantaneous power and the limited power of the battery according to P = U *I. The method is characterized in that an original battery model with current as input and voltage as output is improved into a model with voltage as input and current as output. As for SOP estimation, a known voltage and current calculation model is more suitable, and the problems of tedious steps and large calculation amount of an existing method can be solved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Real-time crop growth condition monitoring method based on spectrum images

The invention provides a real-time crop growth condition monitoring method based on spectrum images. The method comprises steps as follows: determining initial monitoring parameters; screening sensitive wavelengths which have guiding significance in crop growth condition; acquiring crop images F of to-be-monitored crops exposured to the sensitive lengths; analyzing the crop images F to obtain a real-time crop growth condition monitoring model; monitoring the crop growth condition in real time on the basis of the real-time crop growth condition monitoring model. The method has the advantages as follows: images under crop sensitive wave bands are acquired on the basis of a spectrum and image fusion technology, so that the smallest amount of information is provided on the premise that the crop images contain crop growth condition information, follow-up image analysis and processing efficiency is improved, the crop growth condition information can be acquired quickly and accurately, and the crop growth condition monitoring timeliness is improved.
Owner:SHANDONG AGRICULTURAL UNIVERSITY

Iteration-adaptive-algorithm-based method for detecting coherent MIMO radar target

InactiveCN103257344AObject detection performance weakenedAccurately getRadio wave reradiation/reflectionRelational modelObservation point
The invention discloses an iteration-adaptive-algorithm-based method for detecting a coherent MIMO radar target. First, a relation model among a first echo signal, a transmitting signal reflection coefficients and noise interference of the target is confirmed, wherein the relation model is observed on the n observation point, secondly, the relation model is linearized, further the reflection coefficients of the target are initialized through a delayed superposition DAS algorithm, and finally, a bayesian model order selecting tool is used for optimizing the reflection coefficients of the target. An iteration adaptive algorithm can effectively solve existing encountered problems of moving target parameter detection and greatly improves accuracy of detecting of the coherent MIMO radar moving target.
Owner:HOHAI UNIV

TBM vibration damping control method based on particle swarm optimization algorithm PSO

A TBM vibration damping control method based on a particle swarm optimization algorithm PSO comprises the following steps: 1, building a TBM concentration parameter dynamics model; 2, modeling each rigidity node in the TBM concentration parameter dynamics model; 3, taking the minimum TBM vibration intensity and the minimum TBM driving specific energy as targets, and building a multi-target optimization vibration damping control model; 4, using the PSO algorithm to solve the multi-target optimization vibration damping control model, comparing the real time measured vibration parameter with a theory vibration parameter calculated by the concentration parameter dynamics model, further adjusting a control parameter, related to the vibration parameter, in the multi-target optimization vibrationdamping control model; using the optimization iteration algorithm to obtain the optimal rigidity parameter and driving parameter, further adjusting the control parameter in the TBM actual operation process according to the optimal rigidity parameter and driving parameter, thus realizing optimization control of TBM vibration, and realizing the high efficiency driving target of the TBM under the low vibration level conditions.
Owner:SHANGHAI JIAO TONG UNIV

Method of detecting glass defects based on phase image processing

The invention relates to a method of detecting glass defects based on a phase image processing. The method utilizes a glass defect detection system based on the phase image processing; and comprises that light emitted from a light source passes through a raster and forms moire showing a cosine distribution of light intensity on surfaces of to-be-detected glasses, a high-speed linear-array camera collects the moire patterns on the surfaces of the glasses which are then transmitted to an industrial control computer through an image acquisition card, and a defect detection and processing software installed on the industrial control computer timely processes the moire patterns to obtain binary defect images. The method is characterized by firstly subtracting corresponding points of main value images of reference phases respectively containing glass defects and being free of defects, eliminating hopping in the subtraction results by using a hopping error correction algorithm, segmenting into binary images for the glass defects through a mathematical morphology and a segmentation algorithm of combined high and low thresholds, and finally determining the glass defects according to data of the binary images. The method can greatly reduce influences of system noises, improve an operation speed and realize rapid and accurate detection for the glass defects.
Owner:ZHONGBEI UNIV

Touch feeling sensor and touch feeling sensor application apparatus

A tactile sensor for detecting a variation in pressing real-time. The tactile sensor is simple in structure, detects a variation in pressing by using reduced wires, has increased reliability and reduced cost, and can obtain information accurately. A sheet has, along its surface, resistors arranged in an X direction and Y direction, has a resistor in Z direction corresponding to the thickness direction of the sheet, and has a pressure sensitive resistor sheet (4) whose resistance in the Z direction varies according to pressing in the thickness direction. At least a pair of electrodes (9, 10, 11, 12) is placed in the periphery of the pressure sensitive sheet (4), and the electrodes conduct a current to at least either of the resistor in the X direction or the resistor in the Y direction.; Also, at least a pair of conductors (5, 6) for conducting a current to the resistor in the Z direction is provided on the surface of the pressure sensitive sheet (4).
Owner:EW SYST

Scanning and transceiving integrated remote sensing measuring device and method for motor vehicle exhaust based on TDLAS-based (tunable diode laser absorption spectroscopy-based)

The invention relates to a scanning and transceiving integrated remote sensing measuring device and method for motor vehicle exhaust based on TDLAS-based (tunable diode laser absorption spectroscopy-based). Emergence wavelength of lasers covers target absorbing peaks of gas under test through temperature and current control of the lasers; a free light output multi-wavelength coupling unit provideshigh coaxiality or superposition of multiple beams; the coupled beam gains transceiving integration and beam scanning through an off-axis parabolic mirror and a rotating hexahedral reflector; the rotating hexahedral reflector enables the coupled beam to scan exhaust emission plumes and reach strip reflecting stickers on a ground; the transceiving integrated structure focuses light, reflected by the reflecting stickers, to a detector; a detector signal is received and processed by an acquisition processing unit so as to exhaust emission information; the device also includes a wavelength locking unit that locks wavelength of each laser in real time; frequently calibrating a system is not required. The device has high sensitivity and high spectral definition, and is suitable for real-time efficient measurement of exhaust emission.
Owner:SHANXI ZHONGKE HUAYEE TECH
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