57 results about "Particle identification" patented technology

The invention discloses an abrasive particle monitoring method and device and electronic equipment, and belongs to the field of monitoring methods, and the method comprises the steps: collecting a to-be-detected signal based on each probe in an electrostatic sensor; performing variational mode decomposition processing on the to-be-detected signal to obtain a target eigenmode function corresponding to the to-be-detected signal; performing sparse representation based on the target eigenmode function to obtain a target signal corresponding to the to-be-detected signal; performing dynamic time warping on each group of target delay signals by using a sliding window to obtain similarity results respectively corresponding to each group of target delay signals; and if a wave crest meeting a preset condition exists in the sequence diagram presented by the similarity result, determining the number of the abrasive particles according to the wave crest, and obtaining an abrasive particle monitoring result. Through the method, the abrasive particle trigger signal is effectively extracted, the interference of abnormal pulses on abrasive particle identification is reduced, and the accuracy of abrasive particle identification is improved.

The invention relates to an intelligent particle identification method for lunar soil particle screening, which comprises the following steps of: acquiring an optical signal, image data and a surface electrical signal of the same lunar soil sample particle to form a multi-modal feature set of each lunar soil sample particle; carrying out standardization processing on the multi-modal feature set; constructing a multi-modal deep learning neural network model based on a CNN + MLP + splicing fusion module structure; performing supervised learning training on the multi-modal deep learning neural network model to obtain a trained multi-modal deep learning neural network model; and inputting the standardized data into the trained multi-modal deep learning neural network model to realize particle classification. According to the method, an intelligent identification integrated deep learning model is adopted, the functions of particle shape distinguishing, component identification, particle size sorting and the like are carried out by utilizing an intelligent algorithm, automatic classification, clustering and attribute prediction can be realized, manual marking one by one is not needed, and the working efficiency is effectively improved.

The invention discloses a radiation particle identification method based on an improved ResNet-18 network and a CIS transient response technology, and the method comprises the steps: collecting a CIS dark field image in a radiation environment, and generating a multi-modal data set according to neutron, proton and heavy ion radiation experiment sample images; a transient response image data set is obtained through theoretical calculation based on radiation analog simulation software; preprocessing the transient response image data set, and marking particle type, energy and angle information of each sample image as a label of multi-task learning; a pre-trained ResNet-18 model is used, an input layer is modified to adapt to the image size, and a channel attention module is added; and carrying out compression quantification on the model by adopting an optimizer in combination with gradient cutting through a self-adaptive category weight adjustment strategy. By constructing the intelligent feature extraction network, the system realizes automatic identification of transient response geometric features, and breaks through the bottleneck that a traditional method depends on artificially defined features.

The invention discloses a debris flow surface SPH particle adaptive processing method and a debris flow real-time simulation method. The invention provides a debris flow surface SPH particle adaptive processing method for overcoming the defect that surface particles are easily misjudged in the prior art. A particle density dynamic threshold is used as a surface particle identification standard, and the optimized dynamic threshold dynamically balances and controls debris flow characteristics to make a judgment contribution to the surface particles by using a real-time velocity gradient, a density gradient and a weight. Neighborhood virtual particles are randomly generated around the mass center of the surface particles to support kernel calculation, and the density and speed attributes of the virtual particles are limited. The debris flow real-time simulation method is realized by utilizing a self-adaptive processing technology. According to the optimization scheme, SPH-DEM coupling is adopted, heterogeneous units form a unified SPH framework, hydrodynamic force is calculated through an SPH method, contact force is calculated through a DEM method, and bidirectional coupling force calculation is completed. An SPH method is realized by adopting a Niagara particle system, and a digital twinborn platform foundation of numerical simulation and visual integrated simulation is constructed.

Methods and apparatus are disclosed for concurrent digital autoradiography of alpha-particle events and positron events using a spatially resolving charged particle detector and a gamma-ray detector. Alpha particles and positrons are detected by the charged particle detector. Positrons are identified based on coincidence with gamma-ray events. A positron-emission autoradiograph is formed based on positron positions. Alpha particles, both coincident and anticoincident with positrons, are identified based on energy deposition patterns. An alpha-emission autoradiograph is formed based on alpha-particle positions and energies. Separation of coincident alpha and positron events recorded by the charged particle detector improves position detection accuracy. Validation of positron imaging for alpha-emitter distribution or dosage, based on correlation of respective autoradiographs, is described. Variations for particle identification based on isotropy, energy, coincidence, or anticoincidence are presented. Disclosed techniques are applicable to alpha-emitting radionuclides with complex decay chains.

Provided are a particle detection device and a particle detection method that have high particle identification properties, can ensure sterility, and have automation suitability.A particle detection device includes a holding part that holds a suspension containing particles, a first flow channel that is connected to the holding part, an observation window that is connected to the first flow channel, a liquid feeding part that transfers the suspension held in the holding part to the observation window, and a fluorescence detection part that detects fluorescence emitted from the particles contained in the suspension through the observation window.

The application discloses a kind of desulfurization slurry gypsum particle impurity rate analysis methods, comprising: using holographic reconstruction method to the holographic image of desulfurization slurry is locally reconstructed;The cross section of local reconstruction is axially positioned, adopts depth of field expansion method to focus image fusion in the same cross section in particle, obtain depth of field expansion chart;With neural network model identification particle image in depth of field expansion chart, output binary image and particle contour coordinates of depth of field expansion chart;With the neural network model with self-attention mechanism module, according to particle contour coordinates, single particle gray scale chart is intercepted from depth of field expansion chart, then according to gray distribution feature is divided into gypsum particle and impurity particle;The geometric parameter information of gypsum particle and impurity particle is extracted, combined with particle category, calculates the impurity rate of desulfurization slurry gypsum particle.The analysis method provided by the application improves the accuracy of particle identification and classification, and improves the accuracy of the calculation of the impurity rate of desulfurization slurry gypsum particle.

This invention discloses a machine learning-based method and system for identifying exhaust gas particles, relating to the field of image processing technology. By acquiring exhaust gas particle images, feature extraction is performed to obtain color cast features. Based on these color cast features, the exhaust gas particle images are color-corrected to obtain a color-corrected image. Particle distribution features are extracted from the color-corrected image using a target model. These particle distribution features are then fused with the color-corrected image to obtain an adaptive transmission map. The backscattering coefficient is calculated based on the adaptive transmission map, and the adaptive transmission map is enhanced based on the backscattering coefficient to obtain a final enhanced image. Exhaust gas particles are identified based on the final enhanced image. Through color correction, adaptive transmission map construction, and backscattering enhancement, the color accuracy and particle distribution visualization of exhaust gas particle images are improved, along with image clarity and detail, thereby enhancing the accuracy and reliability of particle identification.

An automated portable Raman microscope combines the simplicity, ruggedness, and selectivity of Raman spectroscopy with the sensitivity of single-particle identification. It includes a visible camera, controllable illumination, and a moving optical head that together acquire images of the sample at different focal planes and under different lighting conditions. An internal processor automatically identifies particles or other targets in these images for Raman analysis, e.g., shifted excitation difference Raman spectroscopy. The moving optical head scans the Raman pump beam across the sample to different targets. A built-in user interface displays the results of the Raman analysis superimposed on visual images of the sample. The Raman microscope's simplicity, reliability, and low maintenance make it easy to use for a wide variety of applications, including analyzing and identifying particles and residues, linking chemical and biometric evidence, and forensics analysis.

The invention relates to the technical field of oil particle recognition, in particular to an oil particle image recognition analysis method and system based on reinforcement learning. When to-be-monitored oil liquid is monitored in real time according to the data of the reinforcement learning model, after the trained reinforcement learning model receives a to-be-detected infrared image, single-particle and large-particle substances in the image are automatically recognized, the large-particle substances are combined with the projection area of the large-particle substances and the average particle size threshold value in the S3, and the to-be-monitored oil liquid is monitored in real time. The calculation method for calculating the number of the single particles comprises the step of dividing the area of the large particles by the area of the small particles to obtain the number of the large particles composed of the small particles so as to avoid counting errors of the small particle sizes; after calculation, a result is output, the output content is the actual count (the number of single particles + the sum of the number of single particles after aggregate splitting) of the particles in the output oil, and data support is provided for equipment loss diagnosis; therefore, the problem of low counting caused by misjudgment of aggregates as single particles due to particle aggregation in the high-viscosity oil liquid is avoided.

This invention belongs to the field of digital holographic imaging and artificial intelligence technology, specifically a holographic particle recognition method based on EFPFNet. While maintaining the traditional holographic optical path structure, this invention addresses the problems of low target contrast, blurred edges, and strong background interference in micro-nano particle holograms. Unlike the traditional approach of directly transferring general target detection models, it proposes a neural network architecture specifically for holographic image features: employing an edge feature convolution (EFC) module and a particle focusing mechanism (PFM) module to enhance the perception of weak particle diffraction features and suppress complex background noise, respectively; and using simulation data generated based on a physical model as the training set, effectively solving the problem of scarce real labeled data. This method possesses high detection accuracy, high robustness, and excellent generalization ability, and can be applied to target detection scenarios such as biomedicine and industrial inspection without significantly increasing optical hardware costs or detection time.

This invention proposes a multi-frequency electromagnetic feature fusion method for abrasive particle identification, involving signal processing, sensor information fusion, and intelligent monitoring of mechanical conditions. It solves the problems of measurement distortion caused by hardware parasitic parameter coupling, the inability to directly solve the highly nonlinear time-harmonic field model analytically, and the poor convergence of conventional optimization algorithms leading to misjudgment of abrasive particle parameters in existing abrasive particle identification methods. This invention constructs a forward analytical model of the time-harmonic field and a nonlinear objective function, and utilizes the Levenberg-Marquardt (LM) optimization algorithm to jointly invert and extract the equivalent diameter, conductivity, and relative permeability of unknown metallic abrasive particles in a multi-dimensional parameter space. This invention can accurately decouple the equivalent diameter, conductivity, and permeability of abrasive particles, accurately distinguish materials, and the LM algorithm converges quickly and does not diverge, achieving millisecond-level inversion, meeting the high precision and real-time requirements of online monitoring of industrial oil.

In some examples, an apparatus may include an environmental sample analyzer that is executed by at least one hardware processor to analyze an environmental sample at a plurality of wavenumbers. A particle type identifier that is executed by the at least one hardware processor may isolate, based on the analysis of the environmental sample at the plurality of wavenumbers, particle types for a plurality of particles in the environmental sample.

This invention relates to a method, apparatus, and medium for identifying ferromagnetic abrasive particles based on a multidimensional communication aggregation mechanism. The method acquires an image to be detected, converts the image to a preset format, inputs it into a pre-trained neural network model, acquires output data, and obtains a recognition result based on the output data. The acquisition process of the pre-trained neural network model includes the following steps: acquiring multiple original ferrospectral images; for each original ferrospectral image, acquiring an aggregated image; generating a training sample set based on the multiple original ferrospectral images and the corresponding aggregated images; training the neural network model based on the training sample set; and obtaining the pre-trained neural network model after the loss function value reaches a preset convergence condition. Compared with existing technologies, this invention provides a larger receptive field for the neural network model while reducing computational resource consumption and accelerating the recognition speed.

The application discloses a method for identifying a leading particle in mud flow dynamic simulation and a method for querying a neighborhood particle. In view of the defect that the existing SPH model of mud flow cannot distinguish the leading particle, two schemes are provided under a single concept. The method for identifying the leading particle in mud flow dynamic simulation configures a 3D-CNN classification model in the SPH model to identify the leading particle and non-leading particle from the grid scale. The classification model is based on the frame data of the material model, defines a local aggregation space around the object particle, extracts a feature tensor, combines the object particle attribute, analyzes the particle attribute statistical index from the grid scale and the grid scale leading particle identification rule, generates a sample and trains the model. The method for querying the neighborhood particle in mud flow dynamic simulation is based on the leading particle identification technology, adopts tree storage for the leading particle, adopts hash storage for the opposite, obtains a global partition fusion hash table and optimizes the particle query. The application solves the problem of the leading particle of mud flow and global simulation, thereby reducing the operation complexity, optimizing the time and space cost, balancing the accuracy and efficiency of the numerical model.

The invention provides a logging rock debris identifying and naming method and device. The method comprises the following steps: acquiring a rock debris picture; segmenting the rock debris photo to enable each rock debris particle to have an independent area, and obtaining a segmented image; identifying the segmented image by using a rock debris particle identification model, and determining particle information in the rock debris photo according to an identification result; and performing rock debris naming on the rock debris photo according to the particle information in the rock debris photo. By means of the scheme, identification and naming of the rock debris on the microcosmic particle level can be achieved, and the logging efficiency and accuracy are greatly improved.

The invention belongs to the field of microparticle impact experiments, and particularly relates to a recognition tracking method and a measurement method for particles in a particle swarm impact wall surface, and the recognition tracking method comprises the following steps: S1, marking target particles in a particle swarm; s2, acquiring particle parameters in front of a target particle impact wall surface in the particle swarm; s3, acquiring the spatial position, the movement speed and the incident angle of the last frame of the target particle in front of the impact wall surface; s4, constructing a particle impact motion trail prediction model, and calculating the predicted position of the target particle in the n-frame range after the target particle impacts the wall surface; and S5, constructing a judgment model, obtaining n frames of images, and judging the particles in the predicted position through the judgment model. The method can effectively solve the key problem of identity loss caused by sudden change of particle rebound direction and speed, mutual shielding, leaving of view and the like when a particle swarm impacts a wall surface.

The application discloses a debris flow surface SPH particle adaptive processing method and a debris flow real-time simulation method. In view of the defect that the prior art is prone to misjudgment of surface particles, the application provides the debris flow surface SPH particle adaptive processing method. A particle density dynamic threshold is used as a surface particle identification standard, and an optimized dynamic threshold utilizes a real-time velocity gradient, a density gradient and a weight, and dynamically balances the contribution of debris flow characteristics to the surface particle determination. A neighborhood virtual particle is randomly generated around a surface particle centroid to support kernel calculation, and the density and velocity properties of the virtual particle are limited. The debris flow real-time simulation method is realized by using the adaptive processing technology. An optimization scheme adopts SPH-DEM coupling, a unified SPH framework is composed of heterogeneous units, the SPH method is used for calculating hydrodynamic force, the DEM method is used for calculating contact force, and bidirectional coupling force calculation is completed. The Niagara particle system is used for realizing the SPH method, and a digital twin platform foundation of integrated simulation of numerical simulation and visualization is constructed.

The application discloses a fire smoke detection method with combustible material identification capability, and relates to the technical field of fire smoke detection. Characteristic information of combustible material particles is obtained based on SEM / AFM observation and chemical element component analysis, and then three scattering matrix elements are selected according to the characteristic information. A combustible material identification model is set by taking the related parameters of the selected three scattering matrix elements as the input of the combustible material identification model, and a combustible material particle identification threshold is set. Suspicious particulate matters are marked by screening according to the characteristic information of on-site particulate matters, and then a target function of the suspicious particulate matters is output according to the combustible material identification model. The target function is compared with the combustible material particle identification threshold to determine whether there is suspicious combustible material particles, and then a fire smoke alarm is triggered. The combustible material particles are accurately identified through scattering matrix and particulate matter characteristic analysis, so that the accuracy and reliability of fire warning are improved.

The invention discloses a marking method and system for a compact sandstone microscopic image, and the method comprises the steps: carrying out the edge enhancement of particles in the compact sandstone microscopic image through an image processing technology, and obtaining a first image; the sandstone microscopic image segmentation model is used to carry out particle pre-labeling processing on the first image to obtain a second image, and the second image comprises at least one piece of editable labeling information formed according to the particle identification result; and modifying the particle recognition result of the second image according to the editable annotation information. According to the method, the labeling efficiency can be remarkably improved, and the labeling fineness and accuracy are improved.

The application discloses a method for automatic analysis of aggregate particle identification and grading based on deep learning, which comprises the following steps: preparing a standard data set of aggregates, training a deep learning model Mask R-CNN in a training set to obtain an optimal deep learning model of the deep learning model of the material aggregate; determining a test platform area meeting accuracy requirements according to the recognition accuracy and area relationship of the smallest particle size group in the aggregate; realizing automatic identification and segmentation of aggregate particles based on segmentation and splicing technology of large images; calculating the equivalent particle diameter of the aggregate particles, determining the coefficient of each particle in the aggregate through the particle shape, and calculating the equivalent particle diameter of each particle in the aggregate; calculating the volume of the aggregate particles, and calculating the mass proportion of all particles in the particle size range according to the equivalent particle diameter division. The method can output the grading image and grading data of the aggregate in real time, greatly improves the accuracy and efficiency, and can effectively replace the traditional screening method.

The invention relates to the field of particle detection, and particularly provides a photoelectric effect-based ultrafine particle identification and counting method and device, and a storage medium, and the method comprises the steps: obtaining a photoelectric signal generated when a to-be-detected particle flow passes through a photoelectric detection array; extracting original features of the photoelectric signals, and combining time domain decomposition and frequency domain transformation to construct an initial signal feature matrix; performing multi-scale tensor decomposition and signal component screening on the initial signal feature matrix to generate an enhanced photoelectric signal; determining a polarization coherence angle interval based on the enhanced photoelectric signal, extracting polarization energy characteristics, analyzing polarization state conversion characteristics, and establishing a three-dimensional polarization characteristic fingerprint; adaptive segmentation processing is carried out on the enhanced photoelectric signal, an oscillation characteristic spectrum is extracted, and a characteristic incidence matrix is obtained in combination with the three-dimensional polarization characteristic fingerprint; and constructing a multi-dimensional classification criterion based on the feature incidence matrix, and determining a final particle counting result according to the multi-dimensional classification criterion. The method improves the precision and recognition capability of ultrafine particle counting, and is especially suitable for the detection of high-density micro-nano particles in a complex environment.

A sea going instrument is used to measure the 234Th activity on settling particles in the ocean as an indicator of carbon sequestration as export from the surface ocean. The instrumentation can be adapted to multiple sampling platforms with the goal of providing high temporal resolution 234Th flux measurements at multiple locations and depths in the ocean. This proxy of mass flux is used to complement other in situ sensors to provide high resolution data for features such as Chlorophyll-a concentration (Chla), accessory pigments, and PIC normalized to mass flux.

In order to overcome the technical problem that the high efficiency and reliability cannot be considered simultaneously in the existing TFT-LCD panel ACF conductive particle detection method, the application provides a TFT-LCD full dynamic threshold binarization processing method based on pseudo frame difference; the method is inspired by the frame difference idea in motion multi-frame image processing, a new type of efficient pseudo frame difference processing method is established by establishing a plurality of plane image augmented matrices and using two plane image augmented matrices for frame difference in the pre-processing part of the ACF conductive particle identification in the TFT-LCD image, and the technical problem that the high efficiency and reliability cannot be considered simultaneously in the TFT-LCD panel ACF particle detection is solved.

The invention discloses an automatic distinguishing and analyzing system for neutrons and gamma particles. The system takes a graphical interface as a carrier, and integrates data import, pulse shape discrimination feature extraction, double Gaussian fitting and resolution merit figure calculation, configurable artificial neural network classification, static and dynamic clustering based on incremental K-Means, and a multi-view data visualization and result export module. A user only needs to set an integral window, a network hyper-parameter or a clustering strategy, and the system can automatically complete the whole process operation from original waveform reading, feature extraction, model training and evaluation to clustering animation display and label write-back. Compared with a traditional processing mode depending on a single threshold value or an off-line script, the neutron / gamma particle recognition method has the advantages that a high-integration-level, one-stop, real-time and interactive particle recognition platform is achieved, neutron / gamma separation precision, processing efficiency and application flexibility are remarkably improved, and the neutron / gamma particle recognition method is suitable for nuclear radiation monitoring, nuclear security, detector research and development and related scientific research fields.

This invention discloses an online measurement method for the particle size and mass concentration of gypsum particles using a holographic imaging-microscopic imaging coupling technique. The method includes: scattering light from a desulfurized gypsum slurry in a measurement channel after being irradiated with parallel laser light to form a holographic image on the target surface of a first camera; and scattering light from a desulfurized gypsum slurry in the measurement channel after being irradiated with parallel white light to form a microscopic image on the target surface of a second camera. The holographic image is then reconstructed using a holographic reconstruction algorithm to obtain a holographic reconstruction result image. The holographic reconstruction result image and the microscopic image are combined as input to a neural network model, outputting a binarized image of the region containing the gypsum particles. The particle size and mass concentration of the gypsum particles are then calculated based on the binarized image. This invention also discloses an online measurement device employing the above method. The method and device provided by this invention can realize online measurement of the particle size and mass concentration of gypsum particles in desulfurized slurry and can improve the accuracy of gypsum particle identification.

The invention discloses a fire smoke detector and a smoke detection method, equipment and medium thereof, and relates to the technical field of fire smoke particle recognized.The method comprises the steps that scattering characteristics of scattering signals are simulated, the optimal scattering angle is found, and then the position of the fire smoke detector is adjusted according to the optimal scattering angle; the large-angle scattering signal intensity is prevented from being submerged by the small-angle scattering signal intensity; and obtaining the power value of each light emitting source, and comparing and judging the power ratio and a typical aerosol standard curve to distinguish burning particles from non-burning particles and balance the response sensitivity of black smoke and white smoke.

The application provides a kind of waste treatment method and system based on degradable plastic cup production, steps include: first, the collected degradable waste is washed, then it is crushed into the particle of preset size.After washing and drying, the pre-trained recyclable particle identification model is used to intelligently identify and classify the waste particles, which are divided into two categories: recyclable particles and non-recyclable particles.The recyclable particles are regenerated to generate reusable regenerated raw material particles, and the non-recyclable particles are degraded.The advantage of this method is that it introduces intelligent identification technology, improves the accuracy and efficiency of classification.Through the classification of waste, the resource reuse of recyclable part is maximized, and the environment-friendly degradation treatment of non-recyclable part is ensured, which improves the resource utilization efficiency and economic benefit, and also reduces the negative impact on the environment.

The invention discloses a radar vertical detection sand and dust weather monitoring method, system and device and a medium, and belongs to the technical field of sand and dust weather monitoring, and the method comprises the steps: collecting a laser back scattering echo signal; the method comprises the following steps: carrying out polarization separation processing on a laser back scattering echo signal to obtain a parallel polarization signal component and a vertical polarization signal component; calculating a signal intensity ratio through the parallel polarization signal component and the vertical polarization signal component to obtain a depolarization ratio parameter; comparing and judging the depolarization ratio parameter with a preset sand and dust threshold value, and obtaining sand and dust particle identification information according to a judgment result; performing spatial height analysis and vertical height statistics through the sand and dust particle identification information to obtain a sand and dust weather detection result and sand and dust vertical profile data; and comprehensively outputting the sand and dust weather detection result and the sand and dust vertical profile data as sand and dust weather monitoring information. According to the invention, a laser radar backscattering polarization separation technology is adopted, and accurate identification of sand and dust particles is realized by analyzing a depolarization ratio parameter.

This invention provides a quantitative characterization method for solid particles or pores in solid propellants: An image of the solid propellant's surface morphology is obtained using scanning electron microscopy or optical microscopy. An appropriate threshold is selected, and the image is binarized using a particle identification system (PCAS). Then, by setting parameters such as the pore throat closure radius and the minimum pore area, the white areas in the binary image are identified and calculated, yielding parameters such as the content, distribution, and morphological characteristics of particles or pores in the propellant. This invention has the advantages of simple operation, high accuracy, and broad applicability.