141 results about "Time resolution" patented technology

The application discloses a high-rotation flying body flight parameter multi-field synchronous measurement and fusion method and system, the method utilizes a meteorological balloon to detect atmospheric parameters such as air pressure, temperature, humidity and wind direction and wind speed under current atmospheric conditions, arranges an unmanned aerial vehicle array networking as a relay node of a communication link, forms a data transmission link of a measuring device and a ground computing center, and performs positioning and monitoring on a flying body landing point. Under a unified space-time reference, target field distributed measurement and in-situ measurement data are subjected to "real-time + after-the-fact" information fusion, and the estimation precision of the whole trajectory flight parameters of the high-rotation flying body is improved. The method overcomes the limitations of conventional target field testing devices and testing means, and has the advantages of high time resolution, high spatial resolution, high signal signal-to-noise ratio, high information availability and high system integration.

A laser ranging method and device using the autocorrelation characteristics of light intensity random noise, the method comprising: step S1, a wide spectrum light source emits laser light, which is divided into a first light beam and a second light beam by a ranging probe, and the first light beam is defined as a reference light beam; step S2, the second light beam is emitted to a target object to be measured, and a light beam reflected by the target object to be measured is obtained and defined as a signal light beam; step S3, the reference light beam and the signal light beam are coupled to form a coupled light beam; and step S4, the coupled light beam is processed to obtain absolute distance information of the target object to be measured to the light emitting end surface of the probe. The device obtains absolute distance information of the target object to be measured based on light source intensity noise. The present application has the advantages of high time resolution and high precision measurement.

This invention discloses a method for predicting the remaining life of overhead ground wire metal corrosion by integrating intermittent detection and multi-source temporal features, belonging to the field of metal corrosion technology. The steps include: acquiring multi-source data of a target overhead ground wire section; acquiring spatial topological information of the section and constructing a graph structure representing the inter-section relationships; expanding the temporal resolution of the intermittent detection data using interpolation methods to match it with continuous monitoring data; then fusing multi-source features on the expanded data to generate aligned temporal fusion features; inputting the temporal fusion features and graph structure into a spatiotemporal prediction model to predict the future corrosion state evolution trend of the section; constructing a health index that meets physical constraints based on this trend; and finally outputting the remaining life prediction result. This invention, through temporal resolution alignment, retains the dynamic identification capability of high-frequency environmental data for the corrosion process, significantly improving the accuracy of predicting the metal corrosion state of overhead ground wires.

This invention relates to the field of microscopy application technology, and in particular to a SICM scanning control method and related device based on feedback quantization. The method acquires the test height, initial scanning speed, initial safe height of the test point, first speed adjustment start point, and second speed adjustment start point of the test point. It controls the scanning probe to descend from the initial safe height of the test point to the first speed adjustment start point at the initial scanning speed, intervenes with first dynamic speed adjustment, continues to descend to the second speed adjustment start point, intervenes with second dynamic speed adjustment, and continues descending until the probe detects a sudden change in ion current and stops descending. This control method solves the problems of low scanning time resolution and poor safety in existing scanning ion conductivity microscopes by setting an initial speed adjustment point that dynamically adjusts the speed according to the probe's descent position.

The present application belongs to the technical field of data processing, and particularly relates to a method and system for dynamic monitoring of energy carbon based on multi-source data fusion, which comprises the following steps: collecting high-frequency energy data and low-frequency emission data of a target area, performing frequency-raising processing on the low-frequency emission data by using an interpolation algorithm, and performing standardization processing on the two types of data to obtain energy sequences and emission sequences with unified time resolution; calculating the causal fluctuation confidence of the energy sequences at each time, and constructing a cumulative distance matrix in combination with the causal fluctuation confidence; searching for an optimal alignment path of the energy sequences and the emission sequences by using a dynamic time warping algorithm, and calculating a local slope index at each path point; dynamically adjusting the observation noise covariance of Kalman filtering according to the local slope index, performing smoothing correction on the aligned emission data, and outputting the energy carbon monitoring result. The present application solves the problem of distortion in calculation of carbon emission intensity caused by phase misplacement of multi-source data.

This invention belongs to the field of bridge monitoring technology and discloses a time-based bridge deformation monitoring method, device, equipment, and storage medium. The method includes: acquiring monitoring time information of the bridge to be monitored; determining the BeiDou monitoring time and interferometric radar monitoring time based on the monitoring time information; monitoring via BeiDou satellites based on the BeiDou monitoring time to determine BeiDou-monitored deformation information; monitoring via ground-based synthetic aperture interferometric radar based on the interferometric radar monitoring time to determine interferometric radar-monitored deformation information; and determining the deformation monitoring information of the bridge to be monitored based on the BeiDou-monitored deformation information and the interferometric radar-monitored deformation information. Through the above method, different combined monitoring methods are determined based on different BeiDou monitoring times and interferometric radar monitoring times, thereby improving the temporal resolution of bridge deformation and settlement monitoring by using BeiDou and synthetic aperture interferometric radar technologies for time-based bridge deformation monitoring.

The application discloses a kind of precipitation product precision promotion method, system, equipment, medium and terminal.Belong to precipitation product precision technical field, obtain and analyze the characteristic statistical parameters of long sequence monitoring data and short sequence monitoring data, identify the precision of precipitation product, integrate several resampling methods to extract and identify the precipitation product with highest precision in specific area, integrate the deep excavation mechanism of basic specific target point precipitation fusion, the deep excavation mechanism includes optimal probability distribution identification, fusion scale optimization, order feature screening and discrimination method coupling and optimization, excavate the model parameter of specific target point, establish the spatial transmission model of relevant parameter by geostatistical method and spatial information regression mode, the purpose of the application is to construct the technical body system that can significantly improve the precision of current international and domestic mainstream high space-time resolution precipitation product by deep excavation multi-source precipitation product and the model conversion and parameter spatial transmission relationship of measured rainfall.

This application relates to a medical image reconstruction method, apparatus, computer device, and storage medium. Based on the channel values ​​of the detector in the scanning device, a field-of-view weighting function and a reconstruction range weighting function are determined. Based on these two functions, image reconstruction is performed on the raw data of the detected object. The field-of-view weighting function characterizes the relationship between the field-of-view position of a pixel and its weighted value; the reconstruction range weighting function characterizes the relationship between the position of the scanning bed and the reconstruction range weighted value of a pixel. In the embodiments of this application, after determining the field-of-view weighting function and the reconstruction range weighting function, the reconstruction range of the raw data can be determined based on these functions, ensuring that the range of raw data used for each pixel satisfies the sufficiency of the image to be reconstructed. This can improve the temporal resolution of the region of interest in the image to be reconstructed, simultaneously considering both temporal resolution and data completeness.

The embodiment of the present application relates to the technical field of ultra-high-speed imaging, and discloses a framing imaging device, which comprises a chirp spreading element, a diffraction element, a first Fourier lens, a framing element and a second Fourier lens, wherein the chirp spreading element is used for spreading incident light and emitting chirp pulse light; the diffraction element is used for splitting the chirp pulse light into diffraction beams propagating in different directions; the first Fourier lens is used for emitting the incident diffraction beams into central-symmetrical array beams; the framing element is used for framing the array beams into delay beams; and the second Fourier lens is used for converging the delay beams to the same illumination area. The present application also discloses a framing imaging system. The present application solves the technical problem of how to simplify the structure of a conventional framing imaging device under the premise of the same time resolution.

A time difference estimation method of homologous local discharge ultrasonic signals, wherein two-channel homologous ultrasonic signals are collected; the order of a transverse adaptive filter and the number of a cross-correlator are set; the two-channel homologous signals are input into two transverse adaptive filters; the weight coefficients obtained by the two transverse adaptive filters are input into a k-stage cross-correlator; and the time difference between the homologous ultrasonic signals is obtained by peak extraction on the output of the cross-correlator. The method has the advantages of high time resolution, small time difference estimation deviation and good noise resistance, and has high application value in the field of local discharge positioning in power equipment (such as power transformers).

The application discloses a root zone soil moisture estimation method based on remote sensing driving and moisture hysteresis characteristic simulation, an electronic device and a medium. The method can comprise: acquiring remote sensing data with the same time resolution and spatial resolution, including remote sensing surface soil moisture data, remote sensing evapotranspiration data, potential evapotranspiration data, rainfall data and saturated soil humidity; calculating root zone soil humidity based on the remote sensing surface soil moisture data, and then calculating an estimated value of the evaporation ratio based on the root zone soil humidity and the saturated soil humidity; calculating the remote sensing evaporation ratio based on the remote sensing evapotranspiration data and the potential evapotranspiration data; establishing a target function to calculate an error, and when the error is less than a set threshold, outputting the root zone soil humidity. The application introduces the remote sensing evaporation ratio to exert physical constraints to embody the influence of vegetation and improve physical rationality, and constructs a multi-constraint target function optimization model parameter to improve the estimation accuracy and reliability of the remote sensing evaporation ratio.

The application provides a fast random addressing scanning fluorescence correlation spectroscopy method and device thereof, comprising the following steps: S1, using a surface array camera to collect a series of wide field images under light sheet illumination, and obtaining a global low time resolution image fluorescence correlation spectroscopy diffusion image by calculation; S2, selecting an interested region according to the wide field fluorescence correlation spectroscopy image and setting a scanning array generation condition; S3, automatically generating a scanning array according to the selected arbitrary interested region and the set condition.The fast random addressing scanning fluorescence correlation spectroscopy method and device thereof provided by the application can solve the problem that the traditional scanning FCS cannot detect fast kinetics due to slow scanning speed, and can also solve the problem that the traditional scanning FCS cannot simultaneously monitor multiple regions due to the mechanical scanning of the scanning galvanometer.

The present application belongs to the technical field of hydrological and meteorological monitoring, and particularly relates to a regional rainfall monitoring method and system based on environmental neutron flux. By monitoring the environmental neutron flux, the rainfall intensity under the time change rate of the current environmental neutron flux is determined by using the relationship between the rainfall intensity and the time change rate of the environmental neutron flux, thereby avoiding the hysteresis problem of the traditional indirect inversion through soil moisture, realizing the rapid and direct monitoring of the rainfall intensity, and realizing the high-precision seamless rainfall monitoring of a large-area region through sparse station distribution, greatly reducing the construction and operation and maintenance costs, and realizing the continuous monitoring of the regional rainfall with a spatial resolution of hundreds of meters and a time resolution of 1 minute, thereby greatly improving the spatial and temporal resolution of the rainfall monitoring.

The application provides a neurovascular coupling imaging system, method, device and storage medium, which comprises an image collector, a microscope frame arranged in the light inlet direction of the image collector, a visible light system for emitting visible light to a sample to be collected after the visible light is reflected by a beam splitter in the microscope frame, a near-infrared light system for emitting near-infrared light to the sample to be collected after the near-infrared light is reflected by another beam splitter in the microscope frame, and a trigger device for switching the frequency of the time-sharing emission of each light source in the visible light system and the near-infrared light system based on the collection frequency of the image collector. The application can integrate different visible light or near-infrared laser light sources in the light path to be collected, is compatible with various imaging requirements such as visible light for imaging of nerve cell activity and near-infrared light speckle imaging for non-invasive blood flow imaging, ensures that there is no time difference between image collection and light source switching and no time resolution is lost, and facilitates subsequent storage and calculation of data.

The application discloses a river width dynamic calculation method based on intersection analysis of water level and river section shape, relates to the technical field of river hydrological monitoring and river section shape analysis, and comprises the following steps: quality control and benchmark unification are performed on water level and section data; a continuous elevation function is constructed through single-section interpolation, and a river three-dimensional terrain surface is reconstructed by adopting multi-section spatial interpolation; at a given time, a horizontal water level line is established, the horizontal water level line is solved together with the section elevation function to obtain an intersection set, and left and right bank effective intersection points are identified according to the intersection point number and maximum distance criterion; water surface width is calculated and geometric correction is performed, uncertainty is given based on error propagation; a river width time sequence is constructed, and a response relationship is established with flow and water level. The river width dynamic calculation method based on intersection analysis of water level and river section shape has the advantages that it is not dependent on remote sensing and high-frequency field measurement, the time resolution can reach the daily scale or the hourly scale, and is suitable for long-term continuous river width dynamic monitoring.

The application belongs to the technical field of high-energy physics particle detection, and particularly relates to a high-sensitivity fixed beam damage system based on EQR-SiPM and a quartz rod, which comprises the following steps: one end of the quartz rod is inserted into a containing cavity of a SiPM dark box, and the end face is optically coupled with a photosensitive surface of an EQR-SiPM integrated on a SiPM circuit board; on the SiPM circuit board: an output end of a voltage amplification circuit is connected to a signal input end of a SiPM signal processing system through an SMA interface and a coaxial cable, and a signal output end is connected to a central control OPI through a control network; and a attenuator is further connected in series between the output end of the voltage amplification circuit and an analog input end of the SiPM signal processing system. The application can identify weak beam damage of the order of 10^(-18) J by virtue of high photon detection efficiency and high light transmittance of the quartz rod, and has the characteristics of high sensitivity, nanosecond-level time resolution, anti-magnetic field interference, wide dynamic range, and small and compact structure.

The application discloses a self-supporting thin film photocathode design method for improving the dynamic range of a transmission grating spectrometer, and the photocathode is designed by using a self-supporting thin film and an equal-width photocathode slit, so that the difference in photoelectron density in the high-energy area and the low-energy area of a diffraction spectrum is reduced, the dynamic range of the time-resolved transmission grating spectrometer is improved, and the time resolution of the spectrometer along the length direction of the photocathode is kept unchanged. Compared with a conventional equal-width photocathode and a flat-response photocathode, the self-supporting thin film photocathode can reduce the difference in photoelectron density in the high-energy area and the low-energy area of the diffraction spectrum on the photocathode, and improve the dynamic range of the spectrometer. Compared with a width-second-gradual photocathode, the self-supporting thin film photocathode can keep the time resolution of the time-resolved transmission grating spectrometer along the length direction of the photocathode unchanged, and solve the problem that the quantitative spectral analysis is difficult due to the change of the time resolution of the width-second-gradual photocathode along the length direction of the photocathode.

The application relates to a voiceprint recognition method and device. The method comprises the following steps: obtaining a spectrogram of a speech signal, and dividing the spectrogram into a plurality of sub-spectrograms of different frequency bands; using feature extraction networks with different time resolutions to extract feature information of the plurality of sub-spectrograms, wherein the time resolution of a first feature extraction network used for extracting feature information of a high-frequency sub-spectrogram is greater than the time resolution of a second feature extraction network used for extracting feature information of a low-frequency sub-spectrogram; and fusing the feature information extracted by the feature extraction networks with different time resolutions into a voiceprint of the speech signal.

The application provides a high-speed frequency hopping signal capturing device and method, which comprises a radio frequency channel processing unit, a wideband frequency division unit and a first switch switching unit connected in sequence, the first switch switching unit is connected with a frequency counting frequency measurement unit and a wideband demodulation frequency measurement unit, the frequency counting frequency measurement circuit unit and the wideband demodulation frequency measurement circuit unit are connected to a second switch switching unit, the second switch switching unit is connected with a wideband high-speed frequency hopping signal capturing processing unit; the radio frequency channel processing unit is used for measuring the power of the measured radio frequency signal and filtering the stray outside the bandwidth; the wideband frequency division unit is used for frequency dividing the measured radio frequency signal to obtain a wideband intermediate frequency signal; the application adds the wideband demodulation frequency measurement circuit unit, improves the time resolution to several ns, and only needs a low-cost sampling rate ADC and an easily programmable logic device to realize, so that the design difficulty and complexity of the circuit and timing are greatly simplified.

The application provides a measurement method for reconstructing time-varying absorption based on fixed-point wavelength modulation technology, which comprises the following steps: applying a high-frequency sinusoidal scanning signal to a laser, wherein the scanning frequency is f m ; the wave number response of the laser has a nonlinear relationship with the current, and the nonlinear fitting of discrete wave numbers obtains a continuously changing wave number function v(t); the Beer-Lambert law is used to express the absorption rate α v (t) of the laser by the absorption medium; the Fourier transform and the lock-in filtering extraction are performed on α v (t) to extract the harmonic waves of the absorption rate function with time; the wave number information of the dynamic harmonic waves at any time is supplemented by numerically solving the inverse function of the wave number function at the rising edge or the falling edge, so that the absorption rate at each time is reconstructed, and the calibration-free measurement is realized. The absorption rate reconstructed by the application has a higher signal-to-noise ratio and does not reduce the time resolution of the spectrum.

The present application relates to a kind of city heterogeneous heat and humidity source analysis and heat and humidity environment characterization method, system, equipment and medium based on multi-source data space-time cooperation, wherein, method includes: calibration fixed test site and determine mobile detection path;For each fixed test site and mobile detection path, parameter acquisition is carried out, obtains environmental background reference sequence and heat and humidity transient field data;Dynamic background increment correction field is constructed to compensate heat and humidity transient field data, generate standardized heat and humidity environment field and establish the mapping relationship between environmental background reference sequence, execute analysis processing, with thermal physical property parameter output heat contribution value.Effectively overcome the limitation of traditional monitoring means in space-time resolution and heat and humidity coupling characterization by the present application through multi-source space-time cooperation correction and thermal physical property parameter stripping analysis, realize the high-precision synchronous perception and classification mechanism revelation to microscale block in heterogeneous heat source and heterogeneous underlying surface contribution value.

This invention discloses a lidar and its signal acquisition and control method and electronic device. The signal acquisition and control method includes: determining the current application scenario of the lidar; determining the signal acquisition parameters corresponding to the current application scenario, the signal acquisition parameters including at least two of the following: the time resolution of the time-distribution control (TDC), the ranging range corresponding to the histogram, and the number of histograms output in the same time period; configuring at least two of the following operating parameters of the sensing chip: the time resolution of the TDC, the number of sensing pixels activated in the same time period among multiple sensing pixels, and the storage mapping of the memory; controlling the activated sensing pixels to sense light signals from corresponding field-of-view partitions in the field of view, controlling the TDC to detect the arrival time of the light signals, and counting the light signals in the corresponding storage units according to the arrival time of the light signals and the storage mapping of the memory. Implementing the technical solution of this invention achieves a balance between ranging performance and system resources.

The application discloses a method and system for measuring plasma density gradient, and belongs to the technical field of plasma physics diagnosis, which comprises the following steps: a femtosecond laser pulse with wide spectrum characteristics and an initial pulse width is incident to a to-be-measured plasma; the pulse width of the femtosecond laser pulse reflected by the to-be-measured plasma is measured; according to a preset mapping relationship between the pulse width of the reflected femtosecond laser pulse and the plasma density gradient and the pulse width of the femtosecond laser pulse reflected by the to-be-measured plasma measured at present, the density gradient of the to-be-measured plasma is determined. The application overcomes the limitation of insufficient time resolution of traditional methods such as the interference method and the shadow method, does not need complex density distribution reconstruction algorithms or model assumptions, can directly obtain gradient information according to the preset mapping relationship between the reflected pulse width and the density gradient, and reduces the data processing complexity and inversion error.

Testing methods for evaluating visual and neurological functions of a human or animal subject that involve conscious perception. The tests include a training phase, a practice phase, and a visual rivalry phase for detecting binocular rivalry or multistate competition. The design of the testing methods offers simple, rapidly administered, nonverbal visual testing with high time resolution and access to changing conscious perceptual states of the test subject. The methods also make possible the collection of a large amount of data in a short time for analysis of the subjects visual function and brain function, and can be used in the diagnosis of many medical conditions.

The application discloses a kind of three-dimensional deformation field measuring device and measuring method of projectile body in penetration process, it is related to projectile body penetration test technical field, its technical solution key points are: including: light gas gun, for launching solid projectile;Special target store, its lateral wall is equipped with observation window, inside is equipped with target plate and the projectile to be measured fixed on target plate;Three-dimensional digital image acquisition equipment, symmetrically arranged outside observation window, including two high-speed cameras of synchronous trigger, matching lens, high-brightness light source and synchronous trigger;Magnetic speed measuring instrument, set in the tail of the barrel of light gas gun;Data processing equipment is used to receive the image sequence collected by three-dimensional digital image acquisition equipment, based on calibration parameter calculation the three-dimensional displacement field of the surface of the projectile to be measured, full-field strain field and velocity field, visual output deformation evolution process.The application can realize the non-contact, high space-time resolution measurement of three-dimensional dynamic deformation field of projectile body itself in the transient process of projectile body penetrating target plate.

This invention discloses a multi-energy quasi-monoenergy soft X-ray spectrometer for plasma radiation measurement, belonging to the field of X-ray detection technology. It includes an aperture group, an objective lens unit, and an image plane detector array with time resolution. The aperture group is used to define the incident solid angle of each measurement channel and suppress stray radiation. The objective lens unit consists of multiple quasi-monoenergy multilayer mirrors, each mirror surface corresponding to an independent measurement channel and including a background channel. Multiple measurement channels share a single energy point. The image plane detector array corresponds one-to-one with each measurement channel, forming a soft X-ray detection system with time-resolved measurement capabilities. This invention, using the above spectrometer, effectively avoids measurement uncertainties caused by the convolution inversion of energy spectrum distribution and energy response function, and is suitable for online soft X-ray energy spectrum diagnosis of inertial confinement fusion plasmas such as lasers and Z-pinch.

The application discloses a kind of scintillation detector monitoring method, device, equipment and medium, the method includes: the light-emitting lifetime of original scintillator in scintillation detector is obtained;If light-emitting lifetime is greater than preset light-emitting lifetime threshold, replacement instruction is sent to replace original scintillator with target scintillator, so that the light-emitting lifetime of target scintillator is within preset light-emitting lifetime threshold, wherein the dielectric constant of organic layer in target scintillator is less than the dielectric constant of organic layer in original scintillator.By replacing original scintillator, the target scintillator after replacement has an organic layer with a lower dielectric constant than the original scintillator.By using an organic material with a smaller dielectric constant for the organic layer without changing the inorganic layer, the light-emitting lifetime of the scintillator can be effectively reduced to meet the demand for higher time resolution in the field of radiation detection.This method is simple and effective, and has a significant effect on improving the time resolution in the field of radiation detection.

The application relates to a method and device for reconstructing an angiography image and an angiography imaging system, wherein the method for reconstructing the angiography image comprises the following steps: acquiring first projection data collected by a target imaging device at a first acquisition angle, and acquiring second projection data collected by an X-ray imaging device at a second acquisition angle; the X-ray imaging device is independent of the target imaging device, and the first acquisition angle is different from the second acquisition angle; reconstructing a four-dimensional angiography image according to the first projection data collected at multiple first acquisition angles and the second projection data collected at multiple second acquisition angles, and obtaining the four-dimensional angiography image. The method can obtain projection data at different angles without changing the collection track of the target imaging device, can reduce the interference of the blood vessel overlapping area, can consider the time resolution, and can improve the reconstruction quality of the 4D DSA reconstruction image.