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User identity identification method based on Wi-Fi signal
InactiveCN106446828AIrrelevantNon-intrusiveCharacter and pattern recognitionWi-FiChannel state information
The invention provides a user identity identification method based on a Wi-Fi signal. A Wi-Fi transmitter, a signal receiver and a terminal device are comprised. The method is characterized in that the method comprises the steps that the Wi-Fi transmitter transmits the Wi-Fi signal; the signal receiver receives the Wi-Fi signal to acquire channel state information; the channel state information changes when a human body passes; and the terminal device carries out denoising processing on the channel state information data, extracts the shape feature of a line-of-sight waveform, and carries out classifying by matching and comparing the shape feature of a line-of-sight waveform to acquire an identification result. The method based on the Wi-Fi signal has the advantages of device independence, privacy protection, intrusion prevention and the like compared with existing methods of using cameras, radars and wearable devices.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Human face collecting method at a distance
InactiveCN102708361AAccurate collectionImprove clarityCharacter and pattern recognitionTwo degrees of freedomPersonal computer
The invention relates to a human face collecting method at a distance, belongs to the image processing field, and aims to solve the problems that human face collecting distance is not far and friendliness in a collecting process is not enough in the existing human face collecting technology. Human face collecting devices comprise a personal computer (PC), a binocular camera, a two degree-of-freedom rotating pan tilt and a telephoto camera, wherein the telephoto camera is arranged on the two degree-of-freedom rotating pan tilt. The human face collecting method at a distance includes that the PC adjusts the two degree-of-freedom rotating pan tilt according to a three-dimensional coordinate of a target human face collected by the binocular camera so as to drive the telephoto camera to align to the target human face direction and to collect video information of the target human face; if the video information is a front face, then the front face is adjusted to the central area of the current video frame image to finish the collection, and the sharpness is adjusted; and if the video information is not a front face, the collection is repeated.
Owner:HARBIN INST OF TECH
Method and system for measuring polymer melt temperature field based on capacitance tomography
InactiveCN102620855AImprove accessQuick responseThermometers using electric/magnetic elementsUsing electrical meansTomographyPolymer melt
The invention discloses a method and a system for measuring a polymer melt temperature field based on capacitance tomography. The method comprises the following steps of: measuring a capacitance value of a capacitance pole plate of a capacitance type polymer melt temperature field sensor, which is calibrated; according to a capacitance tomography image reconstruction algorithm, reconstructing polymer melt dielectric constant distribution based on the measured capacitance value; establishing a relationship model of polymer melt dielectric constant and temperature; and according to the relationship model, converting the polymer melt dielectric constant distribution into the corresponding polymer melt temperature field. By the invention, the polymer melt temperature acquisition ability of a person is improved, the method is superior to the conventional partial single-point measurement mode, the problem of difficulty in measurement of the polymer melt temperature field in the conventional temperature measurement method is solved, and the method has the advantages of non-invasiveness, high response speed, simple structure and the like.
Owner:SOUTH CHINA UNIV OF TECH
Non-contact breathing detection method
ActiveCN109171731ASolving Phase Offset IssuesBreath detection implementationRespiratory organ evaluationSensorsChannel state informationPhase shifted
The invention provides a non-contact breathing detection method, including the steps: receiving radio frequency signal through at least two receiving antennas; conjugating multiplication of the firstchannel state information and the second channel state information corresponding to the radio frequency signals received by any two receiving antennas to construct a third channel state information; Analyzing features in the third channel state information to determine an optimal respiration detection feature; and calculating a respiratory frequency according to the optimal respiratory detection feature. The invention utilizes the radio frequency signal transmitted by the commercial WiFi equipment to realize the detection of the target breathing frequency. The conjugate multiplication method is used to solve the phase shift problem of commercial WiFi, and the amplitude feature and phase feature are combined for respiration detection, which realizes the respiration detection of commercial WiFi without blind area. In addition, the technical proposal provided by the invention also has the advantages of non-intrusion, convenience, low cost and the like in practical application.
Owner:北京大学(天津滨海)新一代信息技术研究院
Method for detecting pulmonary artery blood pressure by using heart sound analysis method of multilayer feedforward network
InactiveCN102334985ANon-intrusiveAchieving risk-free detectionEvaluation of blood vesselsAngiographyFast Fourier transformPrincipal component analysis
The invention relates to a method for detecting the pulmonary artery blood pressure by using a heart sound analysis method of a multilayer feedforward network. The method comprises the steps of: extracting a heart sound signal; preprocessing the heart sound signal by fast Fourier transform and normalized average Shannon energy distribution to obtain heart sound signal features; filtering the heart sound signal features by using a principal component analysis method; and performing training learning on the filtered hear sound signal features by using a perceptron neural network or a multilayer perceptron feedforward neural network to obtain an optimal neural network between the heart sound signal features and a pulmonary artery blood pressure value. The heart sound signal features are signal features of a first heart sound and a second heart sound; the heart sound signal features comprise crest frequency, average frequency, crest amplitude, average amplitude, duration and time interface of heart sounds. By adopting the method for detecting the pulmonary artery blood pressure by using the heart sound analysis method of the multilayer feedforward network, provided by the invention, the pulmonary artery blood pressure can be easily and conveniently detected at low cost in a non-intrusive and no risk manner.
Owner:THE HONG KONG POLYTECHNIC UNIV
Second harmonic imaging method and second harmonic imaging device for single suspended particles
InactiveCN106990075AImprove capture efficiencyLow costAnalysis by material excitationSuspended particlesLight spectrum
The invention discloses a second harmonic imaging method and a second harmonic imaging device for single suspended particles. According to the method, Bessel laser is adopted for effectively capturing the suspended particles, and remote noncontact and noninvasive capture and high capture efficiency are realized; imaging is realized by second harmonic signals generated on the particles by femtosecond laser, polarization resolution, spectral resolution and three-dimensional imaging are realized, and imaging and observation of fine particles are realized. The device for implementing the second harmonic imaging method has advantages that due to adoption of common optical devices, low cost is realized while imaging of the second harmonic signals can be well realized, and suitableness for popularization is achieved.
Owner:NORTHWEST UNIV
Device and method for measuring parameters of gas-liquid two-phase flow in micro-pipes based on thermal measurement method
InactiveCN102095749ANon-intrusiveSimple structureMaterial heat developmentThermometers using electric/magnetic elementsPorositySignal conditioning circuits
The invention discloses a device and a method for measuring parameters of gas-liquid two-phase flow in micro-pipes based on a thermal measurement method. The device comprises a measurement micro-pipe, temperature sensors, a signal conditioning circuit, a data collection system and a computer. The temperature sensors are respectively mounted at four positions of an internal insulation layer of the measurement pipe wall; a first thermal resistor is used for measuring the flow temperature before heating; a second thermal resistor is used for heating and measuring the flow temperature; and a third thermal resistor and a fourth thermal resistor are used for measuring the flow temperature after heating. The third thermal resistor and the fourth thermal resistor are used for correlative operation to obtain the flow velocity information; the first thermal resistor, the second thermal resistor and an outer circuit constitute a constant-temperature-different measurement circuit so as to analyze signals to obtain the porosity information; and finally, the volume of the two-phase flow can be calculated by derivation. The invention provides an effective way for solving the parameter measurement problem of the gas-liquid two-phase flow in the micro-pipe, and the related device has the advantages of simple structure, no invasion, low cost, and the like, and provides sufficient parameter information for the two-phase flow measurement.
Owner:ZHEJIANG UNIV
Method for inverting concentration of suspended particulate matters based on acoustics
InactiveCN106546518ANon-intrusiveSuspended particulate matter concentration is accurateParticle suspension analysisRayleigh scatteringUltrasound attenuation
The invention relates to a method for inverting concentration of suspended particulate matters based on acoustics; the method comprises: receiving a back-scattering signal of an underwater scattering body to obtain echo strength by using an acoustic Doppler current profiler; according to a sonic equation, correcting the echo strength by considering acoustic wave geometric attenuation and absorptive attenuation to obtain volume back-scattering strength; according to the corrected volume back-scattering strength, finally inverting the concentration of suspended particulate matters with high time-space resolution in accordance with Rayleigh scattering principle. The method can provide precise concentration of suspended particulate matters.
Owner:TIANJIN UNIV
Apparatus and method for detecting defect of carbon fiber composite based on electromagnetic chromatography imaging
The present invention relates to an apparatus and method for detecting defect of carbon fiber composite based on an electromagnetic chromatography imaging technique in a mode of single-coil-excitationmulti-coil induction. The apparatus includes a module for generating and forming excitation signals, a module for amplifying current and driving excitation coil, a module for exciting and detecting coils, a module for sampling back, recuperating and amplifying induction signals, a signal collection board card and a PC machine. The method includes steps feeding an alternation drive current to theexcitation coil so as to induct an alternation excitation magnetic field, the defect of the carbon fiber composite board will change the distribution of the excitation magnetic field; according to electromagnetic induction principle, obtaining an amplitude and a phase of a signal, regenerating an image for reflecting the size and position of the defect in the carbon fiber composite board by an algorithm of regenerating an image through shadow cast, so as to implement a non-contact, non-interposition and rapid nondestructive detection to the carbon fiber composite.
Owner:BEIJING JIAOTONG UNIV
Self-adaptive snoring sound signal detection method
ActiveCN105962897AAccurate analysisThe test result is accurateDiagnostic recording/measuringSensorsMel-frequency cepstrumSelf adaptive
The invention provides a self-adaptive snoring sound signal detection method, which comprises the following steps: 1, conducting endpoint detection on an acquired sleep audio signal so as to obtain a sound event; 2, extracting characteristics of the sound event obtained in the step 1, so that an Mel frequency cepstrum coefficient; and 3, clustering the characteristics extracted in the step 2, and determining snoring sound and non-snoring-sound signals. With the application of the detection method disclosed by the invention, the snoring sound signal in the sleep audio signal can be effectively detected out; and the detection method is accurate in detection result and excellent in performance.
Owner:NANJING UNIV OF SCI & TECH
Adaptive radio frequency coil and coil array facilitating wearing
InactiveCN107589386AEasy to wearThe material is soft and comfortableMagnetic measurementsElectricityNMR - Nuclear magnetic resonance
The invention provides an adaptive radio frequency coil and a coil array facilitating wearing to greatly enhance the wearing comfort, be compatible with wearing requirements of different examination positions of patients of different figures, reduce the mutual inductance effect between coils, increase the signal-to-noise ratio of a magnetic resonance image, and improve the imaging speed or the imaging quality of the magnetic resonance image. The adaptive radio frequency coil comprises an oscillation circuit layer, a dielectric layer and a shielding layer attached in sequence in a fastening manner; the coil array facilitating wearing comprises a first wearing plane and a second wearing plane which are telescoping and flexible and arranged in mirror symmetry in appearance and structure; thefirst wearing plane and the second wearing plane form clothes through connection of local edges; the first wearing plane and the second wearing plane are respectively and fixedly provided with a plurality of above adaptive radio frequency coils; and two adaptive radio frequency coils respectively located on two adjacent wearing planes and opposite to each other always maintain mutual mirror symmetry. The adaptive radio frequency coil and the coil array can be applicable to usage during nuclear magnetic resonance imaging.
Owner:石建国
Contactless perception positioning method
ActiveCN107390172AAchieve positioningNon-intrusivePosition fixationVoltage-current phase anglePhase shiftedPhase difference
The present application discloses a method and system for determining a Fresnel phase shift in an environment and a computer readable storage medium. The method comprises a step of allowing a receiving device R to receive a radio frequency signal from a transmitting device T, wherein the radio frequency signal comprises two or more carriers, a step of constructing a K layer Fresnel area of the two or more carriers with the position of the transmitting device T and the position of the receiving device R as ellipse focuses, a step of laying a reflection target in the environment such that the reflection target moves in the environment, a step of determining a theoretical Fresnel phase difference between different carriers caused by the reflection target for at least one carrier pair combination in the at least two carriers, a step of determining an actual Fresnel phase difference between different carriers caused by the reflection target and the environment for the at least one carrier pair combination in the at least two carriers, and a step of comparing the actual Fresnel phase difference and the corresponding theoretical Fresnel phase difference, and determining the Fresnel phase shift of the at least one carrier pair combination in the environment. The invention also discloses a method of carrying out indoor positioning based on the method for determining a Fresnel phase shift in an environment.
Owner:PEKING UNIV
Measurement and judgment method for orthopedics diagnosis
ActiveCN102440759AImprove accuracyNon-intrusiveDiagnostic recording/measuringSensorsArtificial hip jointsBone density
A measurement and judgment method for orthopedics diagnosis comprises the steps of providing bone resonant frequency and bone length as well as a correction parameter of a testee, and setting the resonant frequency, the bone length and the correction parameter into a formula for calculation to obtain the bone density of the bone. The correction parameter can be of a circumference parameter or a weight parameter. In the method, whether artificial coax joints are loosened is judged better through comparing the input fundamental frequency amplitude with the generated harmonic amplitude.
Owner:QUANTA COMPUTER INC +1
Control device of charging pile and control method thereof based on face recognition
InactiveCN107054137AAvoid lossEasy to useCharging stationsCharacter and pattern recognitionDegaussingImage based
The invention discloses a control device of a charging pile based on face recognition and a control method of the charging pile based on the face recognition. A control circuit board of the control device of the charging pile based on the face recognition further identifies and extracts preprocessing standard information of a face image based on characteristics of Adaboost algorithm and outputs gray scale characteristic information of the face image. A local area network server compares the gray scale characteristic information of the face image with preset gray scale characteristic information, and outputs a comparison success signal or a comparison failure signal. The control circuit board triggers or shuts down a charging circuit of the charging pile according to the comparison success signal or the comparison failure signal. In the process of using the charging pile, users do not need to carry IC cards and other keys, so that the loss, degaussing and other problems of the IC cards are avoided. The control device of the charging pile based on the face recognition improves the reliability while facilitating use, and effectively prevents the IC cards from being cracked and copied and other security risks.
Owner:JIAXING HENGCHUANG ELECTRIC EQUIP
Detection method and device for internal defects of jujube fruits on basis of visible/near-infrared spectrum
ActiveCN108152231ANon-intrusiveImprove efficiencyInvestigation of vegetal materialOptically investigating flaws/contaminationInfraredJujube Fruit
The invention discloses a detection method and device for internal defects of jujube fruits on the basis of visible / near-infrared spectrum. The detection method comprises the following steps of: (R1)sample preparation and spectrum information acquisition; (R2) establishment of a judgment model for the internal defects of the jujube fruits: adopting a model with the highest accuracy in judging theinternal defects of the jujube fruits as an optimum judgment model; (R3) using the optimum judgment model to judge the internal defects of the jujube fruits to be detected; (R4) recurrence of the internal defects of the jujube fruits to be detected. Proved by experiments, the detection method for the internal defects of the jujube fruits on the basis of the visible / near-infrared spectrum providedby the invention has the beneficial effects that the judgment accuracy for the internal defects of the jujube fruits can reach 96.77%; by acquisition of the visible / near-infrared spectrum informationof the jujube fruits, the judgment model for the internal defects of the jujube fruits is established for detecting the internal defects of the jujube fruits; the detection method and device have thecharacteristics of fastness and no damage.
Owner:CHINA AGRI UNIV +1
Inertial separation microfluidic chip based on electrical impedance tomography (EIT) visual detection
InactiveCN107583695ASimple structureImprove detection accuracyLaboratory glasswaresMicrofluidic chipPhysics
The invention discloses an inertial separation microfluidic chip based on electrical impedance tomography (EIT) visual detection. The microfluidic chip is composed of a tube, a first electrode array set, a second electrode array set, and a third electrode array set. The first electrode array set is arranged in the inlet of the tube. The second electrode array set is arranged in the middle bend ofthe tube. The third electrode array set is arranged in the outlet of the tube. The electrodes of the first electrode array set, the second electrode array set, and the third electrode array set are all connected to a pin socket. The provided microfluidic chip has a simple structure, is suitable for detecting a high concentration solution, and is non-invasive. The pipeline is in a round shape, andthus has a higher detection precision, compared with a square pipeline.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
A passive human body identification method based on narrow-band radio frequency link sampling
PendingCN109948481AAvoid Forced FitsAvoid visual effectsCharacter and pattern recognitionHuman bodyProbability estimation
The invention relates to a passive human body identification method based on narrowband radio frequency link sampling. The method comprises the following steps: collecting biological characteristic information generated by walking of a pedestrian to be identified through a plurality of radio frequency links, matching the biological characteristic information with a radio frequency signal receivingintensity sequence, fusing the radio frequency signal receiving intensity sequences of all the radio frequency links to obtain a fused radio frequency signal receiving intensity value vector; carrying out maximum likelihood probability estimation matching on the fusion radio frequency signal receiving intensity value vector and each Gaussian mixture model in an identity database, and carrying outidentity recognition on the to-be-recognized pedestrian according to an output probability value. According to the invention, biological characteristic information generated by walking of a pedestrian to be identified is sampled and acquired through the constructed multi-angle interleaved radio frequency links; forced cooperation and visual privacy invasion of a user in a limited environment areeffectively avoided, the dependence of correct recognition on illumination and different wearing clothes is remarkably reduced, and the advantages of being free of invasion, difficult to hide, difficult to camouflage and the like are achieved.
Owner:HUIZHOU UNIV
Long-range control method and data processing equipment used for realizing same
InactiveCN104252242ASafety concernsNon-intrusiveDigital output to display deviceNetwork structureStructure of Management Information
The invention discloses a long-range control method and data processing equipment used for realizing the same, which are not provided with invasion property and do not need a special port. The long-range control method is applied to the data processing equipment which comprises a first control unit and a second control unit, wherein the method comprises the steps of utilizing the first control unit to obtain keyboard, image and mouse signals from keyboard, video and mouse interfaces of controlled station equipment; transmitting the keyboard, image and mouse signals to the second control unit by the first control unit in a network or 3G communication mode; outputting and displaying the image and mouse signals by the second control unit. The mouse and keyboard signals are obtained through the mouse and keyboard interfaces by the first control unit, no invasion property exists, the controlled equipment is not collocated, and the worry of safety problem of a client is not caused. In addition, the signals are transmitted in the network or 3G communication mode, the existing network structure of the client is not changed, and simultaneously the client network is not independent of.
Owner:LENOVO (BEIJING) LTD
Method and system for detecting number of personnel in ship cab based on WiFi
PendingCN112949487ARealize Quantity DetectionSafety managementParticular environment based servicesCharacter and pattern recognitionAlgorithmOriginal data
The invention discloses a method and a system for detecting the number of operators on duty in a ship cab based on WiFi. The method comprises the following steps: 1) acquiring a wireless signal representing an environment state to obtain an original state signal; 2) analyzing the original data signal to obtain a CSI signal; 3) preprocessing the CSI signal, and screening out subcarriers with relatively high sensitivity to environmental perception; 4) performing frequency domain and time domain feature extraction on the preprocessed CSI signal to obtain a CSI feature signal; 5) extracting continuous CSI signals in a sliding window W, analyzing time domain and frequency domain information of the continuous CSI signals, and calculating statistical characteristics of different personnel numbers under the information; and 6) carrying out classification and identification on the calculated personnel quantity statistical characteristics by using a support vector machine algorithm, and identifying the quantity of operators on duty in the ship cab. According to the invention, the number of operators on duty in the ship cab can be effectively detected.
Owner:WUHAN UNIV OF TECH
Sound level estimation
ActiveCN106658327ANon-intrusiveDoes not take up spaceSignal processingReverberation timeEngineeringLoudspeaker
Disclosed is a method of determining in real-time an estimate value of a sound pressure level or sound exposure corresponding to sound produced in an acoustic environment by multiple loudspeakers of a sound system in response to an input signal to the sound system. The method comprises determining in real-time the estimated value of the sound pressure level or sound exposure on the basis of the input signal. The sound system is a level-calibrated sound system. Also disclosed is a real-time sound level estimator. Also disclosed are a method and a real-time sound level estimator where the estimated value is based on an approximate value of system properties based on microphone measurements, or established for multiple listening positions, respectively. Also disclosed are methods of calibrating and monitoring a sound system and calibration and monitoring devices therefore.
Owner:音乐部落创新丹麦有限公司
Eddy current probe ring array method for detecting laying direction of carbon fiber composite material
ActiveCN106546657AAvoid mechanical rotationWith non-contactMaterial magnetic variablesEddy currentFibrous composites
The invention discloses an eddy current probe ring array method for detecting the laying direction of a carbon fiber composite material. The method includes: constructing an eddy current probe ring array, selecting an eddy current probe optimum frequency, conducting eddy current probe autobias adjustment, extracting signal feature extraction information and calculating signal amplitude, utilizing polar coordinates to display a normalized signal and determining the directional angle of a laying layer. The carbon fiber composite material laying direction detection method provided by the invention combines probe array method and near resonance frequency work mode to extract probe signal induced voltage, presents the laying direction information of a carbon fiber laminated plate in a polar coordinate form, can accurately and effectively realize judgment of the carbon fiber composite material laminated plate laying, has the characteristics of fast imaging speed, clear and reliable imaging result, visualizability and understandability.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Process fault self-healing method, device and equipment for part in distributed management system
ActiveCN111930565ARealize process fault self-healingRealize fault self-healingRedundant operation error correctionApplication procedureManagement system
The invention discloses a process fault self-healing method, device and equipment for a part in a distributed management system. The method comprises the steps of obtaining configuration information comprising an application program interface address of a distributed management server in the distributed management system and a metadatabase address of a metadatabase in the distributed management system; collecting the current running state of the part from the distributed management server by utilizing the application program interface address; collecting metadata from the metadatabase by utilizing the metadatabase address; according to the current running state and the metadata, performing fault checking on the part; and when it is detected that the faulty part exists, sending a process restart task of the faulty part to the distributed management server by utilizing an application program interface. By utilizing the technical scheme provided by the embodiment of the invention, cross-version compatibility can be realized, the self-healing process is visible, the service integration code is non-invasive, and the process fault self-healing of the part in the distributed management system is simple and efficient.
Owner:TENCENT CLOUD COMPUTING BEIJING CO LTD
Optical method-based anti-motion interference reflection type pulse rate signal detection device
ActiveCN109009050AGood reference signalEnhance anti-motion interference abilitySensorsMeasuring/recording heart/pulse ratePulse rateNon invasive
The invention discloses an optical method-based anti-motion interference reflection type pulse rate signal detection device and relates to the field of detection instruments. According to the pulse rate signal detection device, two LED light-emitting tubes are arranged for receiving two signals in a photoelectric receiving tube after being matched with the reflection characteristic of a narrow-band total reflection film. Between the above two signals, one signal is an optical signal completely reflected by the narrow-band total reflection film directly after being emitted from the LED light-emitting tubes through an air layer, wherein the pure noise interference is achieved. The other signal enters a human body through the skin of the human body after being emitted from the LED light-emitting tubes through the air layer, the narrow-band total reflection film and a flexible substrate, and is finally reflected back to the photoelectric receiving tube, wherein the signal contains the pulse information with noise interference. After the two signals are obtained, the two signals can be used for subsequent data processing. In this way, the pulse information of a person to be tested is calculated. The device is designed based on a photoelectric volume pulse wave monitoring method, and has the non-invasive characteristics. By means of the device, the pulse information can be quickly and accurately obtained.
Owner:ZHEJIANG UNIV
Non-contact gesture recognition method
PendingCN113534946AAccurate and contactless gesture recognitionReliable gesture recognitionInput/output for user-computer interactionCharacter and pattern recognitionChannel state informationRadio frequency signal
The invention discloses a non-contact gesture recognition method, which is characterized in that under the condition that a human target does not carry any equipment, channel state information (CSI) is extracted from a wireless radio frequency signal sent by a signal base station by using terminal signal receiving equipment, and different gestures of the target are recognized. Since Fresnel areas exist and are non-uniformly distributed around a receiving terminal, the gesture recognition effect is related to the position of a target and the relative position of receiving and transmitting equipment. Under the condition that the position of the communication base station transmitting the signal is uncertain, the method can estimate the approximate direction of the communication base station and find the optimal position of gesture interaction, so that the motion features are extracted to carry out reliable non-contact gesture recognition.
Owner:PEKING UNIV
System error checking method and device
ActiveCN110838929ASolve the cost of troubleshootingNon-intrusiveData switching networksSystem errorOperating environment
The invention discloses a system error checking method and device. The system error checking method comprises the following steps: providing a test environment; when the operation of the target account is detected in the current system operation environment, switching the operation environment corresponding to the target account from the current system operation environment to the test environment; and checking system errors according to the obtained user behavior information and the system abnormal information. The system error checking method and device provided by the invention at least have the following technical effects: the system error checking method provided by the invention guides online users to a test environment, and solves the problem of system error checking cost by using asmall amount of machines and computing resources.
Owner:ALIBABA GRP HLDG LTD
Flaw detecting device for detecting bottom cracks or defects of steel rail
Owner:BEIJING JIAOTONG UNIV
A tumor classification system based on radiomics
ActiveCN108765411BIndividualized treatment plan is goodConvenient guidanceImage enhancementImage analysisComputer visionComputer science
The present invention provides a radiomics-based tumor classification system, including: lesion area extraction, used to extract lesion data; heterogeneous area extraction, using a clustering method to extract all initial heterogeneous areas in the lesion data, and then Determine the final clustering result based on the connectivity and number of pixels of the clusters on the image, and find out multiple heterogeneous regions; parameter vector extraction, extract the shape, state and other parameters of each heterogeneous region; type group extraction, The clustering method is used to divide each heterogeneous area into clusters to obtain multiple categories. New lesion type determination is used to determine which type each heterogeneous type of new lesion belongs to. The new lesion typing result is used to output the new lesion typing result. The tumor typing system of the present invention has the advantages of non-invasiveness, non-intervention, repeatability, etc., and its analysis object is based on all lesion tissues, and the information is comprehensive.
Owner:NORTHEASTERN UNIV LIAONING
Cell viability detection device and method based on optical fiber digital coaxial holographic microscopy
ActiveCN108570409ANon-intrusiveEnabling Quantitative ImagingBioreactor/fermenter combinationsImage enhancementBiological cellRefractive index
The invention provides a cell viability detection device and method based on optical fiber digital coaxial holographic microscopy and relates to the technical field of cell detection. The device comprises a laser light source emitting unit, an image collecting unit, an image acquisition unit, an objective table and a computer, wherein the upper-end plane of the objective table is provided with a transparent object-carrying window for placing cell sap, the laser source emitting unit is arranged at the lower end of the object-carrying window, the image acquisition unit is arranged at the upper end of the object-carrying window, and the output end of the image acquisition unit is connected with the input end of the computer. The device has the advantages that a cell sap hologram is determinedaccording to the fact that cells and an environment medium have different light refractive indexes and light passing the cells changes in phase as compared with light passing the environment medium,a Fourier transform method is used to reconstruct and invert cell section images, and arc tangent operation is used to obtain the true phase images of the cells; cell viability is determined accordingto the proportional relation between cell phase differences and refractive index differences; noninvasive and nondestructive quantitative imaging of biological cells is achieved.
Owner:GUANGZHOU BOSMA CORP
Multi-phase flow parameter distributed optical fiber measurement system based on optical carrier microwave interference
PendingCN112014352ANon-intrusiveRealize long-distance distributed measurementPolarisation-affecting propertiesPhase-affecting property measurementsCarrier signalEngineering
The invention relates to a multi-phase flow parameter distributed optical fiber measurement system based on optical carrier microwave interference. The system is characterized in that the the system comprises a broadband carrier signal source (1), an optical polarizer (2), an optical polarization controller (3), a broadband frequency tunable microwave source (4), an electro-optical modulator (5),an optical amplifier (6), an optical circulator (7), a transmission optical fiber (8), a distributed sensing optical fiber (9), a photoelectric detector (10), a lock-in amplifier (11), a vector microwave detector (12), a computer (13), a measuring pipeline (14) and multi-phase flow (15). The distributed sensing optical fiber (9) is laid and embedded in the inner wall of the multi-phase flow pipeline.
Owner:TIANJIN UNIV
Man-machine efficacy evaluation method based on eye movement tracking technology
PendingCN111124124AImprove interactivityAvoid maintenance changesInput/output for user-computer interactionGraph readingMedicineStatistical analysis
The invention belongs to the technical field of aircraft interaction, and particularly relates to a man-machine efficacy evaluation method based on eye movement tracking technology. The method comprises the following steps that: eye movement tracking measurement indexes in man-machine efficacy are set; a specified task which is to be executed a pilot and is related to man-machine display interfaceinformation is set; the all eye movement data of the pilot during the execution of the predetermined task by the pilot are collected by utilizing an eye movement tracking tool; and probability statistical analysis and man-machine efficacy performance evaluation are performed on the eye movement data. According to the human-computer efficacy evaluation method based on the eye movement tracking technology, the contradiction between highly integrated processing information and the workload of the pilot can be effectively solved, and human-computer efficacy performance is improved.
Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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