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64 results about "Threshold curve" patented technology
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The purpose of an impact threshold curve is to provide one tool to help determine whether the "secondary" or unintentional impacts of Neighborhood Traffic Management Program (NTMP) projects are acceptable. These impacts are frequently in the form of increased traffic on adjacent, non-project, Local Service streets.
Vibration monitoring and failure diagnosis method for wind generating set
ActiveCN101393049ASubsonic/sonic/ultrasonic wave measurementEngine testingThreshold curveFailure diagnosis
The invention discloses a method for vibration monitoring and fault diagnosis of a wind generating set, which comprises the following steps: A. presetting a monitoring point, arranging a sensor is arranged, outputting an original vibration signal through the sensor, and finishing the storage of the signal through data acquisition equipment; B. sending feature value data to a receiving module through a component bus module and storing the feature value data in a data center, or obtaining the original vibration signal and store the original vibration signal in the data center through the receiving module which avoids the component bus module; C. presetting a threshold curve in the data center, the feature value data grows continuously, and the receiving module performings fault early warning when the feature value data exceeding exceed a threshold and sends sending status early warning when the feature value data continuously exceed the threshold; and D. establishing a fault diagnosis module is established in an analysis module, presetting a fault diagnosis threshold is preset, the analysis module obtaining envelope signal data from the data center by the analysis module, calculating a comprehensive fault evaluation value through the fault diagnosis module, and comparing the comprehensive fault evaluation value with the fault diagnosis threshold, thereby performing fault alarming.
Owner:BEIJING TIANYUAN SCI & TECH CREATION WINDPOWER TECH +1
Method for monitoring low-frequency vibration of wind power generation set
ActiveCN102829977AEasy to handleAccurate processingInternal-combustion engine testingWind motor controlNacelleResonance
The invention provides a method for monitoring low-frequency vibration of a wind power generation set. The method includes the following steps of acquiring set vibration signals of the wind power generation set by an acceleration sensor, processing the set vibration signals correspondingly by a filter and a wave detector in a vibration analyzer to acquire various low-frequency vibration monitoring signals, transmitting the monitoring signals to a PLC (programmable logic controller) of a wind power generation set control cabinet, and comparing threshold values, corresponding to the various monitoring signals, of an alarm threshold curve in the PLC so that the PLC can process fault alarms or fault halts according to compared trigger conditions. The method for monitoring low-frequency vibration of the wind power generation set has the advantages that resonance of a tower and blades of the wind power generation set can be effectively and accurately solved, and faults caused by other low-frequency vibrations in safety impact monitoring, driving chain vibration and engine framework can be further effectively and accurately solved.
Owner:天津瑞源电气有限公司
Real-time detection system for parked vehicles
ActiveUS20180151063A1Improve efficiencyReduce computing costImage enhancementImage analysisData setSimulation
The present invention discloses a real-time detection system based on hybrid background modeling for detecting parked vehicles along the side of a road. The hybrid background model consists of three components: 1) a scene background model, 2) a computed restricted area map, and 3) a dynamic threshold curve for vehicles. By exploiting the motion information of normal activity in the scene, we propose a hybrid background model that determines the location of the road, estimates the roadside and generates the adaptive threshold of the vehicle size. The system triggers a notification when a large vehicle-like foreground object has been stationary for more than a pre-set number of video frames (or time). The present invention is tested on the AVSS 2007 PV dataset. The results are satisfactory compared to other state-of-the-art methods.
Owner:UNIVERSITY OF MACAU
Ultrasonic sensor system and method for sensing distance
InactiveUS20090268553A1Increase amplitudeImprove the sensing marginDirection finders using ultrasonic/sonic/infrasonic wavesAcoustic wave reradiationUltrasonic sensorAcoustic wave
Methods and ultrasonic sensor systems are presented for sensing distance in which an acoustic output signal is directed toward a target and acoustic input signals are received from the direction of the target, and the received signal is compared with a selected one of a plurality of different receiver threshold curves to identify the acoustic wave travel time to the target and back while differentiating between the target and acoustic waves reflected more than once and waves reflecting off obstructions between the sensor and the target, where the user selectable receiver threshold curves are tailored for different target and / or obstruction conditions.
Owner:PEPPERL FUCHS GMBH
Hydraulics management for bounded implements
Owner:CATERPILLAR INC
Loudspeaker simple tone detecting method
ActiveCN1838839AImprove detection accuracyImprove accuracyElectrical apparatusTime domainOnline test
The invention relates to a loudspeaker sound detecting method, which comprises: the computer of sound card collects the time wave; the computer distinguishes the signal head of said wave to judge the initial position of one section of effective signal; computer processes Daub4 wavelet discompose on attained signal and reset preset parameter to 0 to process the wavelet rebuilding, to attain the rebuilding signal; the computer transforms the display method of attained result, to build the special sound curve; and the computer compares the special sound curve with the preset threshold curve, when there is one point of special sound curve is higher than the threshold of said point, the sound is detected as disqualified. The invention has high reliability, wider application and it can be used on online test.
Owner:TSINGHUA UNIV +1
Hearing aid fitting method based on mobile terminal
The invention provides a hearing aid fitting method based on a mobile terminal. The hearing aid fitting method comprises the steps of a connecting step, providing a double-ear heating aid which is internally provided with a microphone and a loudspeaker, wherein the double-ear hearing aid further comprises a storage module in which a self frequency response characteristic and a testing signal of the hearing aid are stored, and the storage module is further used for storing a hearing compensation solution after fitting; connecting the hearing aid with the mobile terminal, and realizing controlling of the hearing aid by the mobile terminal; a calibration step, acquiring a correspondence between the signal level value and an actual sound pressure level of the hearing aid at each frequency point by the mobile terminal according to the self frequency response characteristic stored in the hearing aid; a hearing threshold testing step, after the user wears the double-ear hearing aid, making the hearing aid replay the testing signal by the mobile terminal, and obtaining a hearing threshold curve according to a user feedback; and a compensation solution determining step, determining a hearing compensation solution according to the hearing threshold curve, and storing the hearing compensation solution in the hearing aid. Through storing the testing signal in the hearing aid and introducing the calibration step, hearing aid fitting accuracy based on the mobile terminal is greatly improved.
Owner:BEIJING SAIBIN TECH
Intelligent cat-eye system triggering shooting based on luminous intensity and distance detection
ActiveCN105306912AAvoid burnsUse intelligenceTelevision system detailsLaser detailsDoorbellLaser transmitter
The invention discloses an intelligent cat-eye system triggering shooting based on luminous intensity and distance detection. Based on results of a luminous intensity analysis module and a distance measurement module, an external processor controls the activation of a camera. When the change curve of environment luminous intensity data exceeds a preset threshold curve, and the distance D between a target and a laser emitter measured by the distance measurement module is no greater than a preset distance threshold, the external processor outputs a trigger signal to activate the camera. When a visitor is close to a door, the intelligent cat-eye system can automatically start a doorbell calling system, and is intelligent and convenient to use. An emission mode having laser emission time less than 0.1 S, interval time greater than 0.1 S, and a period about 0.2 S can prevent eyes from being damaged by laser. Based on the determination of luminous intensity change and object distances, the intelligent cat-eye system activates a camera when luminous intensity drops suddenly and a target distance is closer, thereby avoiding misjudgement caused by going out of aisle lamps (illumination intensity can drop suddenly), and obtaining higher determination accuracy than a control method which only depends on luminous intensity detection.
Owner:CHENGDU BILSUM SCI & TECH DEVCO
Audio test method and audio test system
InactiveCN108184201AImprove stabilityImprove reliabilitySubstation equipmentOutput deviceTest fixture
The invention relates to an audio test method, the method comprises the following steps: a to-be-tested terminal and a test device are placed in a sealed box; the test terminal sends a first test signal to the to-be-tested terminal so as to enable a to-be-tested audio output device of the to-be-tested terminal to output a first audio signal; the test device sends a first audio electric signal corresponding to the first audio signal to the test terminal; the test terminal outputs a first test curve according to the first audio electric signal and compares the first test curve with a preset first threshold curve so as to automatically judge whether the to-be-tested audio output device of the to-be-tested terminal is qualified. The invention also provides an audio test system. The audio testmethod and the audio test system provided by the invention directly perform audio test for the to-be-tested terminal and separately test the to-be-tested audio output device and a to-be-tested microphone of the to-be-tested terminal. Thus, reliability of test can be improved further, and stability of the to-be-tested terminal can be improved.
Owner:SHANGHAI TRANSSION CO LTD
Elevator device
In an elevator device, an elevator car and a counterbalance weight are suspended by a suspending body. The suspending body is wrapped over a drive sheave of a hoist. A drive sheave-side detecting means generates a signal corresponding to a rotation of the drive sheave. A suspending body-side detecting means generates a signal corresponding to a movement of the elevator car or the suspending body.A condition monitoring device performs condition monitoring by comparing the difference between a position signal, which is sent from the drive sheave-side detecting means and occurs from the start to the stop of the elevator car, and a position signal, which is sent from the suspending body-side detecting means, with a predetermined threshold profile.
Owner:MITSUBISHI ELECTRIC CORP
Real-time variable lane control method and control system
InactiveCN109448371AMake up for the shortcomings of underutilizationReduce delaysControlling traffic signalsDetection of traffic movementControl systemEngineering
The invention belongs to the field of traffic management and control, and discloses a real-time variable lane control method and a control system. The real-time variable lane control method comprisesthe steps of establishing a variable guiding lane equal-vehicle average-delay model, solving a threshold condition for changing the function attribute according to the variable guiding lane equal-vehicle average-delay model, and drawing a threshold curve map; when a point which is obtained through combining an inlet lane straight driving and left-turn flow value is above the threshold curve, changing the lane function, and otherwise, keeping the original function attribute unchanged, and performing preliminary determining for whether the lane function changes. According to variable guiding lane technology, through dynamically adjusting lane function conversion, a defect of insufficient utilization rate of a left-turn lane or a right-turn lane caused by fixed turn lanes at a crossing can besettled. When the left-turn and straight driving traffic flow of the inlet lane reaches a certain threshold, the function attribute of the variable guiding lane should be changed, thereby realizing apurpose of optimized matching between the lane function and the turning unbalanced traffic flow.
Owner:王晨
Exhaust temperature based threshold for control method and turbine
ActiveUS20130219910A1Continuous combustion chamberTurbine/propulsion engine ignitionCombustorOperating point
A gas turbine, computer software and a method for controlling an operating point of the gas turbine that includes a compressor, a combustor and at least a turbine is provided. The method comprises: determining an exhaust pressure at an exhaust of the turbine; measuring a compressor pressure discharge at the compressor; determining a turbine pressure ratio based on the exhaust pressure and the compressor pressure discharge; calculating a primary to lean-lean mode transfer threshold reference curve as a function of the turbine pressure ratio, where the primary to lean-lean mode transfer threshold curve includes points at which an operation of the gas turbine is changed between a primary mode to a lean-lean mode; and controlling the gas turbine to change between the primary mode and the lean-lean mode.
Owner:NUOVO PIGNONE TECH SRL
Bird repellent device and method based on bird feature recognition
ActiveCN107232175AImprove targetingImprove bird repelling effectCharacter and pattern recognitionAnimal repellantsLoudspeakerSound pressure
Owner:北京中安航信科技有限公司
Composite nervous action potential turning curve calibration and detection system
ActiveCN102908150AGuaranteed accuracyRich detection methodsAudiometeringExternal Auditory CanalsTest stimulus
The invention relates to a composite nervous action potential tuning curve calibration and detection system. The composite nervous action potential tuning curve calibration and detection system is characterized by comprising a computer, an acoustic card, an acoustic sensor, a preamplifier, an electrode, a high-impedance input level, a bioelectric amplifier and earplugs. An audition testing platform is arranged in the computer and comprises a testing executing system and an acoustic card driving system, wherein the testing executing system comprises a plurality of calibration and detection modules. A system calibration and debugging module is used for calibrating and debugging the acoustic card and sensitivity of the acoustic sensor. An acoustic sensor position calibrating module is used for calibrating a position of the acoustic sensor testing an external auditory canal of an animal. An electrode position calibrating module is used for calibrating whether a recording electrode is disposed to testing round window membranes in the animal ears or not. A composite nervous action potential threshold curve detection module is used for testing stimulus intensity thresholds of composite nervous action potentials. A composite nervous action potential tuning curve detection module is used for detecting composite nervous action potential tuning curves. The composite nervous action potential tuning curve calibration and detection system can be widely applied to auditory detection.
Owner:TSINGHUA UNIV
Method for automatically detecting interictal spike waves of epilepsy
ActiveCN108577834AImprove accuracyReduce false alarm rateDiagnostic recording/measuringSensorsAlgorithmSpike wave
The invention relates to a method for automatically detecting interictal spike waves of epilepsy. The method comprises the following steps: extracting, by an MEMD (multivariate empirical mode decomposition), a component in which the spike waves present from scalp electroencephalogram of a epilepsy patient, performing the signal envelop, solving a dynamic threshold curve, and positioning a possibleposition of the spike waves. The method has the advantages that the frequency band range of electroencephalogram (EEG) can be adaptively adjusted according to the electroencephalogram, and the presence position of the interictal spike wave of the epilepsy can be accurately positioned; a novel concept is provided for reducing the burden of the clinical doctor for recognizing the spike waves, and the interictal spike waves can be more accurately automatically detected; and by virtue of comparison, the comprehensive advantage of the method in the aspect of the sensitivity and error rate is better than a method based on a signal envelop distribution model, and a better spike wave detection result can be achieved.
Owner:杭州瑞尔唯康科技有限公司
Noise reduction processing method of ultrasound medical image
ActiveCN103177421AConsistent noise reductionSuppress speckle noiseImage enhancementDiffusionSonification
The invention discloses a noise reduction processing method of an ultrasound medical image. The noise reduction processing method of the ultrasound medical image is characterized by comprising the following steps of calculating an edge intensity image E of a gray-scale ultrasound image I; calculating a mask image P in a smooth organization structure area of the gray-scale ultrasound image I; calculating an edge intensity threshold curve Kcurve of the gray-scale ultrasound image I along a depth direction of an ultrasonic probe scanning line; extracting a corresponding edge intensity threshold from the edge intensity threshold curve Kcurve and utilizing a diffusion coefficient function g to obtain a diffusion coefficient for any ith row image Ei of the edge intensity image E; and utilizing a diffusion equation (formula as follows, wherein all portions of the formula respectively stand for an image the gray-scale ultrasound image I evolving to time t to be formed into, an evolution time step length, a divergence operator and a gradient of the gray-scale ultrasound image I) to perform filtering processing on the image according to the generated diffusion coefficient. The noise reduction processing method of the ultrasound medical image has the advantages of enabling the ultrasound medical image to be capable of utilizing different edge intensity thresholds along the depth direction of probe scanning and achieving the effect of speckle noise suppression optimization.
Owner:深圳蓝影医学科技股份有限公司
Howling suppression method and device, loudspeaker and sound amplifying system
ActiveCN109640223AAchieve high fidelityNo change in frequency response characteristicsFrequency/directions obtaining arrangementsFrequency spectrumEngineering
The invention provides a howling suppression method and device, a loudspeaker and a sound amplifying system. The method comprises the following steps: receiving a first signal, wherein the first signal is a sound signal acquired by a microphone within a first time period; acquiring the frequency spectrum of the first signal, determining a first hearing threshold curve according to the frequency spectrum of the first signal, and generating a first reference signal according to the first signal and the first hearing threshold curve, wherein the first reference signal and the first signal are played by the speaker together; receiving a second signal, wherein the second signal is a sound signal acquired by the microphone within a second time period after the first time period; and calculatinga correlation value of the second signal and the first reference signal, and determining whether to decrease a gain for the sound signals acquired by the microphone according to the correlation value.The sound intensity represented by the amplitude of the reference signal generated in the howling suppression method provided by the invention on any frequency point is lower than the sound intensityof the same frequency point on the hearing threshold curve, the reference signal is not perceived by audiences after being played together with the first signal, high fidelity is achieved, and the generation of howling is suppressed.
Owner:KTMICRO ELECTRONICS
Apparatus and Method for Frequency-Selective Occupancy Detection
ActiveUS20110263211A1Improve scalabilityElimination of static signals to a large extent canNetwork traffic/resource managementTransmission monitoringFrequency spectrumComputer science
An apparatus for frequency-selective occupancy detection of a channel in a frequency band includes a detector for detecting a receive spectrum in the frequency band, a provider for providing node frequencies, a determiner for determining node level values, a determiner for determining the threshold curve and a comparer. The provider provides the node frequencies for a threshold curve with respect to a noise floor in the frequency band. The determiner determines the node level values at the node frequencies based on receive level values of the receive spectrum. The determiner determines the threshold curve in the frequency band based on the provided node frequencies and the node level values at the node frequencies. The comparer compares a current power of the receive level values in the channel with a reference power in the channel predetermined by the threshold curve to detect occupancy or non-occupancy of the channel depending on the comparison.
Owner:INNOVATIONSZENTRUM FUER TELEKOMMUNIKATIONSTECHNIK GMBH IZT
Hydraulics management for bounded implements
A method of allocating hydraulic fluid between actuators in a machine accepts a first command to provide a first requested fluid flow to a first actuator, wherein the first actuator is a bounded actuator such as a steering actuator, and a second command to provide a second requested fluid flow to a second actuator. The system adjusts the first and second commands to produce adjusted first and second commands corresponding to adjusted first and second fluid flows, such that the sum of the adjusted first and second fluid flows is less than or equal to a maximum available flow and the adjusted first fluid flow meets or exceeds the lesser of the first requested fluid flow and a threshold curve that is a function of engine speed or other variable.
Owner:CATERPILLAR INC
Method for testing laser damage threshold of optical thin film
ActiveCN110542684ADamage Threshold DeterminationEnables damage threshold measurementsMaterial analysis by optical meansOptical apparatus testingTest efficiencyOptical thin film
The invention relates to a method for testing a laser damage threshold of an optical thin film. The method comprises the following steps: S1, obtaining laser energy density Fth of the optical thin film during single-pulse laser damage through test; S2, irradiating the optical thin film by the single-pulse laser, recording laser damage area boundary coordinates (xi, yi) when the laser damage boundary on the surface of the optical thin film is not increased any more, and meanwhile, recording the number n of times of single-pulse laser irradiation; S3, comparing Gaussian distribution of the laserenergy density with laser damage area distribution to obtain a laser damage threshold FN of the optical thin film during multi-pulse laser irradiation damage; and S4, continuously changing the incident laser energy density, and repeatedly executing the steps S2 and S3 to obtain a laser damage threshold curve of the optical thin film under the irradiation of femtosecond laser with different pulsenumbers. The method has the beneficial effects that the measurement accuracy of the laser damage threshold of the optical thin film under multi-pulse laser irradiation is guaranteed, and meanwhile, the test efficiency of the damage threshold of the optical thin film under multi-pulse laser irradiation is greatly improved.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Process for the automatic control of a respirator
ActiveUS20120152251A1Kept lowRespiratorsOperating means/releasing devices for valvesAutomatic controlRespirator
A process for automatic control of a respirator changes between two phases of respiration by checking a detected respiratory breathing activity signal for a threshold criterion. If the threshold criterion is met, a changeover is made. A dynamic threshold curve, used for changing over into an inspiration phase, is held, after the beginning of the present expiration phase, at high values until the end of a selected inspiratory refractory period, and is then lowered monotonically, dropping to an inspiratory threshold target value at the expected point in time of the phase duration maximum of the present expiration phase. A dynamic threshold curve, which is held at low values, after the beginning of the present inspiration phase, until the end of a selected expiratory refractory period, is raised monotonically, increasing to an expiratory threshold target value at the expected point in time of the phase duration maximum of the present inspiration phase and is then changed over into the expiration phase when the breathing activity signal drops below the threshold curve for the expiration. The phase duration of the inspiration and expiration phases or breath duration (inspiration and expiration phases) is stored in each case, and the expected points in time of the phase duration maxima are derived from the distributions of the phase durations in relation to the beginning of the respective phase of respiration or from the distribution of the breath durations in relation to the beginning of the previous phase of respiration.
Owner:DRAGERWERK AG
Blood vessel image recognition method and device, computer equipment and storage medium
InactiveCN109658406AAvoid defects with large identification errorsImprove accuracyImage enhancementImage analysisBackground imageBlood vessel
The invention relates to a blood vessel image recognition method and device, computer equipment and a storage medium. The method comprises the steps of obtaining initial boundary pixel points based ongray values of pixel points in an initial blood vessel image; Constructing a threshold curved surface by taking the initial boundary pixel point as a boundary condition based on a preset stable temperature field model; Identifying the initial blood vessel image according to the threshold curved surface to obtain an identified blood vessel image; Carrying out binarization processing on the identified blood vessel image; And identifying a target area in the blood vessel image after binarization processing, and obtaining a target blood vessel image according to the target area. According to themethod, threshold curved surfaces with different thresholds are selected based on different regions; The blood vessel image is recognized, the defect that the blood vessel image recognized through a single threshold value is large in segmentation error is avoided, it is guaranteed that the edges of the recognized blood vessel image and the background image are clear, therefore, the recognition error is reduced, and the blood vessel recognition accuracy is further improved.
Owner:广州天鹏计算机科技有限公司
Auditory non-invasive detection method based on composite nerve action potentials
PendingCN109620251ARealize detectionHigh sensitivityAudiometeringSensorsNon invasiveHearing perception
The invention discloses an auditory non-invasive detection method based on composite nerve action potentials. The method comprises the following steps that a recording electrode is arranged at the lower rear quadrant of a human ear tympanic membrane and close to a tympanic ring, a stimulus sound is sent to an ear of a subject and a stimulus intensity threshold value capable of inducing a compositenerve action potential under the stimulation of each stimulation sound frequency in the test frequency range is extracted from a voltage signal near the tympanic membrane of the subject, a compositenerve action potential threshold curve is drawn to judge whether the hearing intensity sensitivity of the subject is normal, the stimulus sound and a suppression sound are sent to the ear of the subject, suppression sound intensity in the suppression sound frequency range is extracted from the voltage signal near the tympanic membrane of the subject, wherein the suppression sound intensity meets suppression rules at each suppression frequency; a composite nerve action potential tuning curve is drawn to judge whether the hearing frequency sensitivity of the subject is normal; the method realizes the hearing function detection of human ears in a non-invasive manner, and simultaneously realizes the comprehensive detection of a composite nerve action potential threshold curve and a composite nerve action potential tuning curve.
Owner:TIANJIN POLYTECHNIC UNIV
Method and apparatus for motion compensated noise reduction
ActiveUS20170188038A1Improve noise reductionReduce noiseImage enhancementImage analysisPattern recognitionNoise reduction
An apparatus for motion compensated noise reduction for input images is provided. The motion estimation and motion compensation circuit performs a motion estimation operation and a motion compensation operation on a current image and a previous image to obtain a first patch. The block matching operation circuit performs a block matching operation on the current image and the previous image to obtain a second patch. The motion detection circuit performs a motion detection operation on a target patch according to the first patch and the second patch to output a set of third patches. The current image includes the target patch. The noise reduction circuit performs a noise reduction operation on the set of third patches according to a threshold curve, so as to generate the target patch that the noise is reduced. A method for motion compensated noise reduction for input images is also provided.
Owner:NOVATEK MICROELECTRONICS CORP
Underwater acoustic signal design and feedback regulation method for large yellow croaker sound trapping
InactiveCN109769173AGood for sound radiationUniform sound fieldClimate change adaptationPisciculture and aquariaTrappingEngineering
The invention discloses an underwater acoustic signal design and feedback regulation method for large yellow croaker sound trapping, and relates to underwater acoustic signal design and parameter feedback regulation of large yellow croaker sound trapping. According to the signal design, linear frequency modulation signals are adopted according to the auditory threshold curve of the large yellow croaker and are processed through a designed reverse filter, so that emitted sound signals cover the auditory threshold range of the large yellow croaker, the sound power at the frequency band with thehighest auditory sensitivity of the large yellow croaker reaches the maximum, and the sound trapping effect of the large yellow croaker can be enhanced; in the implementation process, the transmittingtransducer is a cylindrical transducer, sound wave radiation in the horizontal all-direction is facilitated, and a uniform sound field is constructed. A feedback adjusting mechanism is added in the sound wave emission process; the amplitude adjustment coefficient and the passband proportion adjustment coefficient of the filter are calculated according to the larimichthys crocea ingestion sound received by the spherical hydrophone, and the waveform of the trapping sound wave can be flexibly changed according to a sea area background noise field through feedback adjustment, so that the reduction of the induction degree of the larimichthys crocea to the sound wave is prevented, and meanwhile, the emission power consumption can be reduced.
Owner:XIAMEN UNIV
Method and system for evaluating resolution index in naked eye stereoscopic display
ActiveCN106331677AAccurate evaluationTelevision systemsSteroscopic systemsIlluminanceImage resolution
Owner:SYSU CMU SHUNDE INT JOINT RES INST +1
Fitting method for evaluating threshold curve of black matrix and evaluation method of black matrix
ActiveCN109920356AAccurately reflect the difference in widthImprove accuracyStatic indicating devicesEngineeringDark line
The embodiment of the invention provides a fitting method for evaluating a threshold curve of a black matrix and an evaluation method of the black matrix, relates to the technical field of display, and can improve the black matrix evaluation accuracy. A fitting method for evaluating a threshold curve of a black matrix comprises the following steps: obtaining a contrast sensitivity value by the widths of a plurality of shading strips extending along the length direction or the width direction of each sample and the widths of sub-pixels included in the black matrix of each sample; the shading strips have N widths, and N is greater than or equal to 2; the width of the shading strips in at least part of the samples is not completely equal to that of the shading strips in other samples; obtaining spatial frequency values corresponding to the samples under different observation distances; marking the visible or invisible condition of each sample dark line under the same ambient brightness and the corresponding observation distance in a coordinate system which takes the spatial frequency as an abscissa and takes the contrast sensitivity value as an ordinate; and fitting a threshold curve,so that the coordinate points of which the identifications are visible or invisible are respectively positioned on two sides of the threshold curve.
Owner:BEIJING BOE DISPLAY TECH CO LTD +1
Polynomial-curve-fitting-based optimization method and device for false alarm threshold of IFF system
InactiveCN109116323AImprove work performanceImprove optimization efficiencyWave based measurement systemsHuman powerOperational requirements
The invention discloses a polynomial-curve-fitting-based optimization method and device for a false alarm threshold of an IFF system. The method comprises: automatic recording and storage of identified target data within an airspace power range are carried out; data preprocessing is carried out; a polynomial model coefficient matrix is constructed; polynomial fitting solution is carried out; iteration with different fitting number of times and error analysis are carried out; a false alarm threshold curve is generated; sector inputting and integration of false alarm threshold curve are carriedout; and effect adjustment and comprehensive evaluation are carried out. According to the optimization method and device, false targets generated by environmental factors of positions can be suppressed effectively in real time; only a false alarm probability parameter value needs to be set during the whole process and no manual calculation is needed, so that the optimization efficiency is high; the operational requirements of quick identification and accurate positioning are met; and the manpower and material costs are lowered substantially.
Owner:四川九洲空管科技有限责任公司
Information processing method and device and storage medium
ActiveCN109982231ARich diversityAvoid problems that fail to meet user needsElectrical apparatusInformation processingInteraction interface
The embodiment of the invention discloses an information processing method and device and a storage medium, and the method comprises the following steps: receiving a test request of ear print data, outputting a standard test sound corresponding to a target frequency, and enabling the ear print data to represent listening thresholds corresponding to different frequencies; detecting a touch action on the touch screen, and adjusting a test line of a standard test sound displayed on the touch screen according to the detected touch action, the test line being a graphical interaction interface for visually reminding a user; obtaining an audition threshold value corresponding to the adjusted test line according to the adjusted test line, and generating an audition threshold curve according to theaudition threshold value; correcting the auditory threshold curve according to a standard isophone curve, and obtaining a sound effect parameter corresponding to the auditory threshold curve; and obtaining at least one sound effect scheme corresponding to the ear print data according to the sound effect parameters. By adopting the method, the diversity of sound effect schemes can be enriched.
Owner:TENCENT MUSIC ENTERTAINMENT TECH SHENZHEN CO LTD
Network payment risk assessment method, device and server
InactiveCN109063965AIncreased benefit/cost ratioGuaranteed to obtainPayment protocolsResourcesPaymentDecision threshold
The embodiment of the present specification provides a network payment risk assessment method. By calculating the payment risk concentration value from the user's network payment behavior data, the payment decision threshold curve based on different scores is determined to evaluate the risk of the user's network payment behavior, so as to release or disturb the transaction process in time, so as to achieve the optimal balance and reduce the overall impact of the disturbed object.
Owner:ADVANCED NEW TECH CO LTD
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