96results about "Particle and sedimentation analysis" patented technology

The present invention relates to a system and method for analyzing foreign substances in a positive electrode material, the system includes a pretreatment part configured to prepare a monolayer sample of a positive electrode material powder, a measurement part configured to obtain an optical image of the monolayer sample using an optical microscope, and an analysis part configured to analyze the optical image of the monolayer sample, thereby obtaining information on foreign substances in the positive electrode material.

Means for rigorous quantitative assessment of sperm motility are presented, based on a number of movement and morphology parameters measured using various image processing methods. The quantitative assessment thereby achieved is objective and multidimensional, allowing for detailed and repeatable assessment of samples. Deep learning methods are also disclosed for detection and classification of sperm cells (or other types of cells or particles) using neural networks, adapted to work both in good and in poor imaging condition, such as low magnification and resolution. Specific methods for both supervised and unsupervised deep learning approaches are delineated. In a non-limiting disclosure, the methods are particularly adapted to deal with cases of azoospermia, where there is a very low number of sperm cells (most of which do not swim) and a lot of debris in the imaged field of view.

The invention discloses a vector flow velocity measuring device and method based on a bidirectional scanning spectral domain optical coherence tomography technology. Comprising a super light-emitting diode light source, an optical fiber coupler, a polarization controller, an interferometer comprising a sample arm and a reference arm, and a collimating lens, the collimating lens, the grating, the focusing lens group and the linear array camera are sequentially connected through a light path; the linear array camera, the computer and the two-dimensional galvanometer are sequentially connected through a line; according to the method, the fixed bias vector velocity is introduced by utilizing the bidirectional scanning technology, the dynamic light scattering optical coherence tomography method and the Doppler optical coherence tomography method are combined, decoupling of each parameter of the vector flow velocity is efficiently and accurately realized, and a quantitative index is provided for vector flow velocity analysis. The vector flow velocity measuring device based on the bidirectional scanning spectral domain optical coherence tomography technology is simple in system setting and low in cost, the time resolution is improved by about 2.5 times, and the measuring time is shorter.

Methods, systems, and apparatus, including computer programs encoded on a storage device, for determining characteristics of particles are disclosed. A system includes a conveyor belt, wherein a first section of the conveyor belt comprises one or more mechanisms arranged to create environmental conditions favorable to sensor reading. The system includes a sensor rig located proximate to the first section of the conveyor belt comprising a plurality of different types of sensors. The system includes a controller configured to: obtain measurement data from the plurality of different types of sensors; apply the measurement data to a machine learning model configured to determine surface chemical characteristics of particles given measurement data; and output the surface chemical characteristics of particles from the machine learning model to one or more components along the conveyor belt.

The invention belongs to the technical field of wind-powder concentration measurement of high-concentration pulverized coal, and discloses a wind-powder online measurement system suitable for high-concentration pulverized coal. According to the invention, a capacitance method and sound wave method double-channel pulverized coal concentration measurement mode is set, abnormal condition identification and comprehensive pulverized coal concentration output are carried out based on measurement results, and errors of a single method are avoided through mutual verification of the two methods and comparison of deviation identification anomalies based on the measurement results; the advantages of the two methods are combined, the measurement precision is improved, and the anti-interference capability and long-term operation stability of the system are enhanced. A device surface hanging material dynamic cleaning mechanism is set, the surface hanging material thickness of a capacitive sensor and an ultrasonic detection device is monitored in real time through a CCD imaging device, and cleaning operation is dynamically executed with the average hanging material thickness and the proportion of the number of monitoring points exceeding the threshold value as trigger conditions. Measurement errors can be reduced, long-term stable operation of equipment is guaranteed, and system reliability is improved.

System for recording data on allergic reactions of a vehicle occupant, comprising a recording and / or storage device (5, 30) by means of which pollen in the area of ​​the vehicle (1) can be recorded and / or stored, wherein the recording and / or storage device (5, 30) has an electrically controllable pollen inlet (34) with which the pollen recording can be controlled.

The invention relates to an experimental device for coupling optical acting force and suspension liquid optical nonlinear measurement, which comprises a laser control module and a microscopic imaging module, and the laser control module and the microscopic imaging module are respectively arranged in two orthogonal directions of a suspension liquid; the suspension liquid is placed in a transparent sample pool; the laser control module comprises a laser, a beam expander, a focusing lens, an imaging lens and a light beam analyzer which are arranged in sequence; the sample cell is positioned between the focusing lens and the imaging lens; the microscopic imaging module comprises a light source, a lighting lens, an imaging lens and an imaging camera which are arranged in sequence; the sample cell is located between the illumination lens and the imaging lens. Compared with the prior art, the device is provided with the laser control module, so that backward acting force for inducing particles in the suspension can be formed, and meanwhile, the focusing nonlinear effect in the suspension can be researched; and the microscopic imaging module can record moving images of particles in the suspension for subsequent analysis.

An analyte detection assembly (1) comprising a housing chamber (2), a separation device (3) housed within the housing chamber (2) and a collection screen (4) also housed within the housing chamber (2). The separation device (3) comprises: (a) a plurality of circular filters (5) which in use are arranged together in coaxial positions along a vertically disposed X axis; and (b) a cylindrical side wall (6) within which the plurality of circular filters (5) are housed and on which is provided at least one openable window (8) which is disposed at one or more of the circular filters (5). Each circular filter (5) has a lower filtration capacity than the circular filter located below it and the circular filters (5) are adapted to rotate about the X axis. The collection screen (4) comprises a collection surface (9) facing the plurality of windows.

Aspects of the present disclosure include methods for determining positional velocity of a particle in a flow stream of a particle analyzer. Methods according to certain embodiments include irradiating a sample having a particle in a flow stream of a particle analyzer with a first laser in a first interrogation region and a second laser in a second interrogation region, detecting light from the irradiated particle by a first photodetector channel in the first interrogation region and by a second photodetector channel in the second interrogation region, calculating a velocity of the particle in the flow stream based on the light detected by the first photodetector and by the second photodetector, determining a parameter of the particle in the flow stream and calculating a positional velocity of the particle in the flow stream based on the calculated velocity and the parameter of the particle. Systems and non-transitory computer-readable storage media configured to carry out the subject methods are also provided.

Provided herein is a method of detecting microorganisms in liquid samples using image features, such as time profiles of object light scattering intensity and time profiles of object position. Related methods, devices, systems, and other aspects are also provided.

A method, comprising: determining electrophoretic mobility associated with a particle in a transverse alternating force microfluidic channel; determining a size of the particle based at least in part on one of Brownian motion of a particle or one or more images of the particle. A system comprising: a microfluidic channel; a plurality of electrodes oriented transverse to the microfluidic channel, the plurality of electrodes comprising an alternating electric field; and a classification system configured to: determine one or more of the following: an electrophoretic mobility associated with a particle in the transverse AC microfluidic channel and / or determine, based at least in part on the electrophoretic motion, and size from image analysis or Brownian motion of a particle or one or more images of the particle, particle shape, particle deformability, for recognition of surface characteristics, such as assaying for receptors and ligands, and to perform electroporation.

The invention relates to a method for ascertaining at least one piece of specific information about bulk material. The invention also relates to a method for generating a data item having at least one piece of information about a bulk material, a method for acquiring information about a bulk material, and a database, a device, and a computer-implemented data structure.

To provide a method for determining the positional velocity of particles in a flow stream of a particle analyzer.SOLUTION: Illuminating a sample having particles in a flow stream of a particle analyzer with a first laser of a first interrogation area and a second laser of a second interrogation area, detecting light from the illuminated particles with a first photodetector channel of the first interrogation area and a second photodetector channel of the second interrogation area, calculating a velocity of the particles in the flow stream based on the light detected by the first photodetector and the second photodetector, and determining a parameter of the particles in the flow stream; Based on the calculated velocities and parameters of the particles, the positional velocities of the particles in the flow stream are calculated.SELECTED DRAWING: None

This invention relates to an air quality measurement device, featuring a casing with a main inlet duct formed in a straight line and of a predetermined length or longer to allow air to flow from an inlet at the bottom to the top; a flow meter located at the top of the main inlet duct to measure the airflow rate; a laser module that irradiates a laser beam onto the air flowing along the main inlet duct; a light sensor that measures the amount of light scattered by dust particles contained in the air; and a processor that receives the measured values from the light sensor, performs continuous high-speed sampling, estimates the speed of dust particles based on the changes in light intensity, and uses the speed of particles to derive their mass.

A search device (10) updates positions and momentums of a plurality of virtual particles, for each unit time from an initial time to an end time. The search device (10), for each unit time, calculates, for each of the particles, a position at a target time of a corresponding particle, calculates, for each of a plurality of nodes, a first accumulative value by cumulatively adding positions at the target time of two or more particles corresponding to outgoing two or more directed edges, calculates, for each of the nodes, a second accumulative value by cumulatively adding positions at the target time of two or more particles corresponding to incoming two or more directed edges, and calculates, for each of the particles, a momentum at the target time of a corresponding particle based on the first accumulative value and the second accumulative value.

A system, device and method for deployment of one or more dust accumulation sensors receives a baseline measurement associated with no accumulation of dust in a target environment, receives a time-elapsed measurement associated with positive accumulation of dust in the target environment, determines a quantity of accumulated dust in the target environment based on the baseline measurement and the time-elapsed measurement, generates a spatial dust deposition distribution for the target environment based on the determined quantity of accumulated dust and determines a deployment for one or more dust accumulation sensors for the target environment based on the spatial dust deposition distribution.

The invention belongs to the technical field of powder pneumatic conveying, and particularly relates to a method and device for measuring the powder particle picking speed. According to the method, to-be-detected material powder flatly laid on a tray of a mass sensor is placed in a rectangular air pipe, fully developed turbulent airflow in the pipe is created, the air speed in the air pipe is gradually increased, sampling and particle size analysis are triggered according to the change of the weight loss rate of the mass sensor, and the particle size of the to-be-detected material powder is measured. Therefore, the picking speed corresponding to the powder particles with different particle sizes of the material is obtained. According to the invention, the turbulent flow which is completely developed in the pipe is created, and'zero-returning of the weight loss rate 'is taken as a unique triggering condition for sampling, so that the powder particle size interval corresponding to each sampling is accurately determined by the current wind speed, and a reliable and accurate corresponding relation between the wind speed and the particle size is established; and errors caused by manual judgment in a traditional method are overcome.

Disclosed are a method of predicting a fine dust concentration and inferring a fine dust source by using local public data and a prediction and inference device. The method of predicting a fine dust concentration and inferring a fine dust source by using local public data includes generating time-series data related to fine dust by collecting public data in a specific region in a predetermined chronological order and determining whether fine dust is generated in the specific region by converting pieces of time-series data collected in consecutive times into an image dataset for training and by training the image dataset for training in a convolution neural network (CNN)-based image classification model.

The present invention relates to an observation device system and method for particle motion in continuous cross-flow filtration. By designing a flat membrane cross-flow filtration device, ideal cross-flow filtration can be achieved, thereby being consistent with the ideal flow conditions in a theoretical model. At the same time, non-invasive observation of particle motion can be achieved, avoiding the influence of a lens on the cross-flow in invasive observation. The particle motion observation using the observation device system is simple and easy to operate, has efficient data processing, intuitive experimental recording results, low measurement cost, and can comprehensively obtain particle dynamics information such as particle displacement and velocity.

The present invention relates to an analysis system and an analysis method for foreign matters in a positive electrode material, and the analysis system for foreign matters in a positive electrode material according to the present invention comprises: a pretreatment unit for preparing a single-layer sample of a positive electrode material powder; the measuring unit is used for obtaining an optical image of the single-layer sample by using an optical microscope; and an analysis unit that analyzes the optical image of the single-layer sample, thereby obtaining information on the foreign matter in the positive electrode material.

The invention relates to an anti-nuclide durability evaluation method for a coating special for nuclear power. The method comprises the following steps: carrying out experimental evaluation on contamination resistance of the coating; carrying out experimental evaluation on the anti-aging performance of the coating in the simulated nuclear power environment; carrying out experimental evaluation on the adhesive force between the coating and the matrix concrete; carrying out experimental evaluation on the nuclide penetration resistance of the coating, and measuring the invasion depth of nuclide in the coating; and based on the experimental evaluation results, establishing a comprehensive evaluation index system, distributing weights according to importance, and comprehensively scoring the durability of the coating. According to the method, the multi-dimensional performance data is acquired, the comprehensive evaluation index system is established based on the evaluation result, the weight is distributed according to the importance, and the durability of the coating is comprehensively scored, so that comprehensive and quantitative evaluation of the anti-nuclide durability of the coating is realized, the defect that the optimal coating cannot be scientifically compared and selected due to the lack of an evaluation method is overcome, and the reliability of the anti-nuclide durability of the coating is improved. The efficiency and the safety of the decontamination work in the decommissioning stage of the nuclear power station are effectively improved.

The present invention relates to the field of food science. In particular, the present invention provides a method for predicting at least one processing property of a ground cereal product, e.g. a wheat flour, comprising steps of separating the ground cereal product into at least two distinct fractions, analysing at least one of these fractions by spectroscopy, and on the basis of the analysis, predicting the at least one processing property of interest of the ground cereal product using a mathematical model. The at least one processing property of interest may be a baking property or a rheological property of dough prepared from the ground cereal product. The present invention further provides a portable device for the preparation and spectroscopic analysis of grain samples suitable for performing the prediction method of the invention, and a software product.

This invention belongs to the field of high-concentration pulverized coal air-powder concentration measurement technology, and discloses an online pulverized coal air-powder measurement system suitable for high-concentration pulverized coal. This invention employs a dual-channel pulverized coal concentration measurement method using both capacitance and acoustic methods. Based on the measurement results, it identifies anomalies and outputs a comprehensive pulverized coal concentration. The two methods are cross-validated, and anomalies are identified by comparing deviations in the measurement results, avoiding errors from a single method. Combining the advantages of both methods improves measurement accuracy and enhances the system's anti-interference capability and long-term operational stability. This invention also incorporates a dynamic cleaning mechanism for the surface material adhering to the device. A CCD imaging device monitors the thickness of the material adhering to the surface of the capacitance sensor and ultrasonic detection device in real time. The cleaning operation is dynamically executed based on the average material adhering thickness and the percentage of monitoring points exceeding the threshold. This reduces measurement errors, ensures long-term stable operation of the equipment, and improves system reliability.

The present invention relates to an environmental dust monitoring and early warning method, system and storage medium, belonging to the technical field. The present invention constructs a protective cover permeability membership prediction model based on a historical permeability membership change characteristic matrix, and predicts the permeability membership information of the protective cover at the current timestamp through the protective cover permeability membership prediction model. Finally, an evaluation is performed based on the permeability membership information of the protective cover at the current timestamp and the dust information of each sub-area in the current environmental area, an evaluation result is obtained, and relevant early warning information is generated based on the evaluation result. The present invention monitors the dust information of each sub-area in the current environmental area, thereby integrating a deep neural network and a Markov chain to estimate the permeability of the protective cover, and thus can timely perceive the threat of dust conditions in the environment to the health of the user, so as to timely improve protective measures according to the situation and ensure the health of relevant professional workers.

Automated digital microscope system for testing a biological sample, the system comprising a housing (4), a slide slot (11) configured to receive and hold a slide (21) containing a biological sample (22), an illumination device (12) arranged on a first side (SI) of the slide slot (11), an image sensor (13) arranged on a second side (S2) of the slide slot (11) opposite to and coaxially with the illumination device (12), a focusing and magnification unit (14) placed at a linear distance from the image sensor (13) on the second side (S2) of the slide slot (11), the focusing and magnification unit (14) comprising an objective lens (141) providing optical magnification and placed coaxially with the illumination device (12) and / or image sensor (13) and a focusing actuator(142) configured to move the objective lens (141). The slide slot (11), the illumination device (12), the image sensor (13) and the focusing and magnification unit (14) are arranged within the housing (4). A processing unit is configured to receive one or more images obtained by the image sensor (13), processing the one or more images, and based on the processing of the one or more images determine a focus distance between the objective lens (141) and the biological sample (22) wherein a focused image of the biological sample (22) is produced on the image sensor (13), and a drive unit is configured to control the focusing actuator (142) to move the objective lens (141) towards or away from the biological sample (22) such that a distance between the objective lens (141) and the biological sample (22) equals the determined focus distance.

A method of determining a brightness (Br) of a charged particle beam (11) focused by a focusing lens (120) toward a sample (10) in a charged particle beam imaging device (100) is described. The method includes (a) taking one or more images (hf, 1 . . . N) of the sample with the charged particle beam imaging device; (b) retrieving one or more beam profiles (gf, 1 . . . N) of the charged particle beam from the one or more images; and (c) determining the brightness (Br) of the charged particle beam (11) based on at least the one or more beam profiles (gf, g1 . . . N), a probe current (Ip) of the charged particle beam, and a landing potential (LE) of the charged particle beam. Optionally, the brightness (Br) determined as above can be used for determining a size (Dvirt) of a source (105) of the charged particle beam (11). Further, a charged particle beam imaging device (100) configured for any of the methods described herein is provided.

According to embodiments of the present invention, an optical sensor is provided. The optical sensor includes a single piece of optical fiber including a modified fiber tip and a distal end opposite to the modified fiber tip. The distal end may be configured to optically communicate with an external light source and an external detector. The modified fiber tip may be configured to be positioned within a turbid medium to deliver light from the external light source to particles in the turbid medium, at least minimize the light being back reflected at the modified fiber tip and receive backscattered light from the particles for determining a real-time fluid property of the particles in the turbid medium by the external detector. According to further embodiments of the present invention, an optical apparatus, an optical arrangement, and a method for determining a real-time fluid property of the particles are also provided.

An automated method for removing tissue samples from seeds includes holding a first seed by a seed grip assembly of a sampling module of an automated seed sampling assembly, and holding a second seed by the seed grip assembly of the sampling module. The method then includes removing tissue from the first seed by a first sampler of the sampling module at a first sampling location of the sampling module while removing residual seed tissue from a second sampling location of the sampling module, at about the same time the tissue is removed from the first seed at the first sampling location of the sampling module, and subsequently removing tissue from the second seed by a second sampler of the sampling module at a second sampling location of the sampling module while removing residual seed tissue of the first seed from the first sampling location.

The application relates to a high-temperature superconducting magnetic levitation space debris simulation device, which comprises a Dewar container and a heat-insulating inner container, the heat-insulating inner container is provided with a partition plate to divide a lower space and an upper space, the lower space is provided with a runway-type high-temperature superconducting magnet structure, the upper space is provided with a cold conduction clamp hand for clamping a high-temperature superconducting sample, the cold conduction clamp hand cools the high-temperature superconducting sample through a first refrigerator connected to the cold conduction clamp hand, the cold conduction clamp hand warms the high-temperature superconducting sample through a heating piece connected to the cold conduction clamp hand, the runway-type superconducting magnet structure is cooled through a second refrigerator connected to the runway-type superconducting magnet structure, the upper space is further provided with a first temperature sensor for detecting the temperature of the high-temperature superconducting sample and a second temperature sensor for detecting the temperature of the runway-type superconducting magnet structure. The high-temperature superconducting magnetic levitation space debris simulation device has a short experimental period, significantly improves experimental efficiency, and reduces experimental difficulty.