50results about "Analysis by material excitation" patented technology

This invention relates to the field of intelligent operation and maintenance and non-destructive testing technology for intelligent transportation infrastructure, and particularly to an intelligent identification method and system for the luminescence performance of self-luminescent road surface materials. The method includes: simultaneously acquiring luminescent images of the road surface, LiDAR point cloud data, and carrier pose data via a UAV platform; processing the luminescent images to obtain luminescence brightness distribution information of the road surface; processing the LiDAR point cloud data to extract three-dimensional geometric feature information of the road surface; performing spatiotemporal registration and fusion analysis of the luminescence brightness distribution information and the three-dimensional geometric feature information; diagnosing the causes of luminescence performance degradation based on preset diagnostic rules to obtain diagnostic results; and generating a comprehensive evaluation report on the self-luminescence performance of the road surface based on the diagnostic results. The fully automated acquisition and processing flow of this invention ensures the high objectivity and repeatability of the test results. All data are labeled with spatiotemporal tags, providing a solid data foundation for tracking material performance degradation trends and evaluating maintenance effectiveness.

A transient grating spectroscopy system for characterizing a sample may include a phase mask, optical element, and a detector. The phase mask may be configured to separate pulsed pump electromagnetic radiation propagating along a pump incident path. The phase mask may also be configured to separate probe electromagnetic radiation propagating along a probe incident path, into a reference component and a probe component. The optical elements may be arranged to direct the pump components, the reference component, and the probe component to an inspection location at the sample, the pump components forming a sample transient grating at the inspection location. The reference component and a portion of the probe component may form a homodyned signal in a detection path as a function of interaction with the sample transient grating. The reference component, the probe component, and a portion of the homodyned signal may be substantially in the common plane.

This invention relates to the field of semiconductor material detection technology, specifically to a method and system for detecting gallium vacancy concentration in gallium nitride (GaN) materials. The method includes: acquiring photoluminescence spectral data sets of a GaN sample under multiple excitation wavelengths; extracting the emission spectral intensity sequence corresponding to each excitation wavelength; calculating the peak intensity ratio between the yellow band emission peak and the band-edge emission peak; and constructing an initial GaN characterization parameter sequence. An improved Kalman filter algorithm with a dynamic weight allocation mechanism for multiple observation matrices is used to suppress temporal noise in the initial parameter sequence, resulting in an optimized GaN characterization parameter sequence. The optimized parameter sequence is then imported into a pre-trained concentration inversion model for feature mapping, outputting the detected GaN vacancy concentration value of the GaN sample. Based on this detection result, material quality grading is determined. This method broadens the dimensions of spectral information acquisition, effectively suppresses temporal noise interference, and achieves quantitative analysis of GaN vacancy concentration.

A multi-index fusion leafy vegetable freshness grading method and spectral detection model are disclosed.The application relates to the field of leafy vegetable freshness grading and detection, and particularly relates to a multi-index fusion leafy vegetable freshness grading method and spectral detection model.The application collects visible-near infrared reflectance spectra and SPAD values, Fv / Fm, weight loss rates and other freshness indexes of leafy vegetables, and adopts multiple methods to pretreat the original spectra.K-means clustering is used to grade the freshness indexes, and the clustering results are comprehensively evaluated by using the CRITIC method to determine the optimal number of categories.The best spectral pretreatment scheme is screened by using partial least squares discriminant analysis, and the best pretreated spectra are reduced in dimension by using principal component analysis to extract main characteristic information.A freshness detection model is constructed based on the reduced characteristic variables, the optimal model is screened by evaluating the model performance, and finally, efficient and accurate discrimination of the freshness of leafy vegetables is realized.

A device and method for analyzing a sample fluid is disclosed. The device comprises a base, a spindle rotatably coupled to the base; a motor that rotates a disc disposed on the spindle, the disc receives a volume of a fluid that has one or more components of the sample fluid; at least one actuator coupled to the base, the actuator mixes the fluid in the disc; at least one sensor coupled to the base, the sensor collects data of the sample fluid in the disc; and a controller that controls each of the spindle, motor, actuator and sensor.

Systems and methods of microscopy include and / or apply a laser light source configured to produce an excitation light; a modulator configured to modulate the excitation light to produce a modulated light; a pulse compressor configured to compress a pulse of the modulated light to produce a pre-compensated light; a beam scanner configured to raster scan the pre-compensated light on a sample; a detector configured to receive a light signal from the sample and produce a detection signal; and a lock-in amplifier configured to receive the detection signal and perform an electronic heterodyne amplification of the detection signal.

A method of measuring at least one biomechanical property of a reproductive cellular structure is provided. The method includes illuminating the reproductive cellular structure with radiation; detecting at least a portion of radiation scattered from the illuminated reproductive cellular structure; analyzing a frequency spectrum of the detected scattered radiation to identify at least one Brillouin frequency shift in the frequency spectrum; and determining the at least one biomechanical property based on the Brillouin frequency shift. The method further includes determining a viability index of the reproductive cellular structure based on the at least one biomechanical property.

The present invention relates to a method for laser marking of a polyethylene component using spectroscopic discrimination of at least two different quality grades of the polyethylene component. The method comprises the steps of providing a polyethylene component to be marked with a laser, illuminating the polyethylene component with light, guiding at least a portion of the transmitted light to a detector, analyzing the transmitted light that is detected by the detector and determining a quality grade of the polyethylene component based on the transmitted light, selecting a set of laser parameters from a plurality of pre-defined sets of laser parameters based on the determined quality grade of the polyethylene component, and laser marking of the polyethylene component with a laser marking device using the selected set of laser parameters.

The invention relates to a lensless holographic microscope-integrated magnetic levitation platform for measuring the viscosity and density of liquids in a microcapillary channel, and to the operating method of said platform. The method of the invention provides the measurement of the viscosity and density of solutions in a portable platform that uses microparticles as a kind of microsensor with magnetic levitation technique, by correlating the levitation speed and height of said microparticles with the viscosity and density of the solution. Furthermore, the integration of a lensless holographic microscope into the platform allows for the visualization and processing of the microparticles levitating within the solution.

A method and respective system are described. The method provides classification of cannabis inflorescence, and comprising: grinding said cannabis inflorescence; and determining a spectrogram of ground cannabis inflorescence; and providing data indicative of said spectrogram to trained machine learning system, pretrained on classification of material composition of cannabis inflorescence, to thereby obtain output data indicative of at least one of composition of selected cannabinoids and terpenes in said cannabis inflorescence, and varieties of said cannabis inflorescence.

This invention discloses an ultraviolet light combined light source device, relating to the field of detection light source technology. The ultraviolet light combined light source device includes a base, a first lens, a second lens, a beam splitter, a first ultraviolet light source element, a second ultraviolet light source element, a third ultraviolet light source element, and a fourth ultraviolet light source element. The light-emitting end of the first ultraviolet light source element is positioned facing a first light-emitting port; the light-emitting end of the second ultraviolet light source element is positioned facing a first opening; and the light-emitting end of the third ultraviolet light source element is positioned facing a third light-emitting port. The first ultraviolet light source element can directly irradiate the workpiece to be detected, the second ultraviolet light source element can uniformly irradiate the workpiece to be detected, the four third ultraviolet light source elements can irradiate the two sides of the workpiece to be detected along a second direction, and the two fourth ultraviolet light source elements can irradiate the two sides of the workpiece to be detected along a first direction, providing a supplementary lighting effect. It has good adaptability and can ensure the illumination effect.

This application provides an optical super-resolution imaging method and apparatus. This method organically integrates light field manipulation and nonlinear effects, possessing both super-diffraction-limited light field focusing capabilities and selective excitation of the resonant modes of the sample to be imaged, thereby achieving deep manipulation of the scattered signal and effective improvement of super-resolution imaging.

An information processing apparatus, an information processing method, a non-transitory computer-readable medium, an a storage device for quantitatively analyzing and storing a relationship between an environment of a measurement target and a response of the measurement target with respect to the environment. The information processing apparatus includes a storage circuitry and an operation circuitry configured to acquire a first physical value by analyzing captured image information, the first physical value being indicative of an environment of a measurement target associated with a first pixel of the plurality of pixels, acquire a second physical value by analyzing the captured image information, the second physical value being indicative of a response of the measurement target with respect to the environment, and control the storage circuitry to store the first physical value and the second physical value in correlation with each other.

This invention discloses a method and system for simultaneous detection of dual density indicators of anode carbon, belonging to the field of anode carbon material performance testing technology. The implementation method of this invention is as follows: 1. Forming an anode carbon spectral matrix; 2. Constructing an anode carbon spectral matrix model using partial least squares regression, and building a feature parameter matrix characterizing the sample density state; 3. Optimizing the fitting degree of the trained anode carbon spectral matrix model using cross-validation and principal component analysis to obtain an optimized anode carbon spectral matrix model; 4. Obtaining the anode carbon spectral matrix to be tested through step 1, inputting the anode carbon spectral matrix to be tested into the optimized anode carbon spectral matrix model, simultaneously obtaining the predicted values ​​of the true density and apparent density of the anode carbon, and comparing the error with the true values; Compared with the prior art, this invention solves the technical problem of simultaneous detection of dual density indicators of anode carbon (true density and apparent density).

The application belongs to the technical field of photoelectrochemical sensors, and particularly relates to a preparation method of a novel photoelectrochemical sensor for simultaneously detecting micrometer and nanometer plastics based on a biosensing strategy, which comprises the following steps: S1, substrate cleaning: ITO conductive glass is sequentially placed in appropriate acetone, ethanol and deionized water for ultrasonic cleaning to remove contaminants such as grease and dust on the surface of the substrate, and the substrate is blown dry after cleaning; S2, ITO / BiOI nanometer array prepared by electrodeposition: an electrolyte containing Bi(NO3)3 and KI is prepared, and a BiOI nanometer array is prepared on the ITO conductive surface by using an electrodeposition method, the deposition voltage is-0.1V to-0.3V (vs. Ag / AgCl), and the deposition time is 1-5 min; by constructing a two-dimensional inorganic / organic van der Waals Z-type heterojunction (FeTCPP / BiOI), the separation of photoinduced electron-hole pairs is effectively promoted, the visible light absorption capacity is enhanced, the transient photoelectric value of ITO / BiOI / FeTCPP is 91.7 times and 7.4 times that of ITO / FeTCPP and ITO / BiOI respectively, and the photoelectric conversion efficiency is significantly improved.

An X-ray microscopy system and method for phase contrast and dark-field imaging utilize a partially coherent X-ray beam generated by a micro-focused X-ray source with a small focal spot size. A spatial beam modulator such as a random phase object, e.g., silicon carbide sandpaper, is placed between the source and the sample to create a random granular speckle pattern. The system employs a high-resolution detection setup with a thin scintillator and a spatially resolved detector with small pixel size to capture shifts in the speckle pattern caused by the sample's refraction effects. By analyzing these shifts, the system computes phase gradients and integrates them to produce detailed phase images, enhancing contrast in low-atomic-number materials like soft tissues and polymers. The compact design reduces source-to-detector distance, improving flux efficiency and system throughput while enabling high-resolution, three-dimensional tomographic imaging.

A spectroscopic assembly may include a spectrometer. The spectrometer may include an illumination source to generate a light to illuminate a sample. The spectrometer may include a sensor to obtain a spectroscopic measurement based on light, reflected by the sample, from the light illuminating the sample. The spectroscopic assembly may include a light pipe to transfer the light reflected from the sample. The light pipe may include a first opening to receive the spectrometer. The light pipe may include a second opening to receive the sample, such that the sample is enclosed by the light pipe and a base surface when the sample is received at the second opening. The light pipe may be associated with aligning the illumination source and the sensor with the sample.

A method for determining the aggregation state of a solute in a solvent includes: irradiating (702) a mixture comprising a solute and a solvent with a pulsed laser beam using a laser source; detecting (704) a portion of the pulsed laser beam that has interacted with the at least one mixture using a detector; characterized in that detecting (704) a portion of the pulsed laser beam includes: detecting asynchronous second-harmonic photons, wherein the asynchronous second-harmonic photons are generated by the interaction of the pulsed laser beam with the solvent of the at least one mixture; and determining (706) at least one value indicating the detected asynchronous second-harmonic photons for the at least one mixture; characterized in that the method further includes: determining (708) at least one aggregation behavior characteristic of the solute in the solvent based on the at least one value indicating the detected asynchronous second-harmonic photons determined for the at least one mixture. This application also describes computer-readable media and apparatus (300, 400, 500, 600).

An X-ray microscopy system and method for phase contrast and dark-field imaging are provided, utilizing a partially coherent X-ray beam generated by a micro-focused X-ray source with a small focal spot size. A spatial beam modulator such as a random phase object, e.g., silicon carbide sandpaper, is placed between the source and the sample to create a random granular speckle pattern. The system employs a high-resolution detection setup with a thin scintillator and a spatially resolved detector with small pixel size to capture shifts in the speckle pattern caused by the sample's refraction effects. By analyzing these shifts, the system computes phase gradients and integrates them to produce detailed phase images, enhancing contrast in low-atomic-number materials like soft tissues and polymers. The compact design reduces source-to-detector distance, improving flux efficiency and system throughput while enabling high-resolution, three-dimensional tomographic imaging.

The present disclosure relates generally to methods and systems for the analysis, development, testing, and / or optimization, of culture media and / or culture conditions for extracellular vesicle production; culture media analyzed, developed, tested, and / or optimized via such assays; and to extracellular vesicles and compositions comprising extracellular vesicles generated using such culture media.

This utility model discloses a portable optically stimulated luminescence (OSL) dating sample collection device, comprising a top block and an outer tube. A long, narrow handle is located in the middle of the top block, and an insertion block is located at the bottom of the top block, which is inserted into the top of the outer tube. A sampling tube, metal and rubber gaskets are fitted inside the outer tube, and a drill bit is located at the bottom. This utility model consists of a top block, an outer tube, and several small components, with a simple structure and easy portability. The threaded outer tube is powered by hammering and rotation via the top block, facilitating rapid drilling and retraction during sampling. The number of rubber and metal gaskets can be adjusted according to the length of the sampling tube, reducing the difficulty of processing the sampling tube and facilitating its acquisition.

A method for screening molecular crystal megalibraries for non-centrosymmetric structure can include scanning a substrate comprising a plurality of molecular crystals with a tunable laser, a focusing objective, and a detector, to identify molecular crystals emitting a second harmonic generation (SHG) signal. The method also includes correlating the regions having an SHG signal with elemental composition and optical images to identify compositions of molecular crystals having a non-centrosymmetric crystalline structure. The method can be performed at a plurality of measuring temperatures to identify the Curie temperature of a composition. The method can further include designing a composition with a target Curie temperature.

A method of detecting a cancer biomarker concentration of an in vitro biological sample with a magnetic Janus particle conjugated with a detecting antibody (conjugated MJP) includes providing a solution including the conjugated MJP; adding an in vitro biological sample including exosome to the solution to form a complex, in which the in vitro biological sample is a standard sample with a known concentration or a test sample with a test concentration; performing a treatment including an excited light and an alternative magnetic field at a plurality of driving frequencies to the complex to obtain an SNR-driving frequency curve of the complex in the standard sample or the test sample; obtaining a cut-off frequency from the SNR-driving frequency curve of the standard sample or the test sample; and establishing a standard curve from the cut-off frequency of the standard sample and obtain test concentration of the test sample.

The application relates to the technical field of nonlinear optics, and discloses a second-harmonic signal reconstruction method and product based on amplitude-phase joint filtering, which comprises the following steps: performing second-harmonic polarization imaging on a sample by using a microscopic imaging system to obtain a plurality of second-harmonic intensity images; constructing a three-dimensional image stack based on the plurality of second-harmonic intensity images; performing Fourier transform on the three-dimensional image stack along a third dimension to obtain a target frequency domain data set; performing joint filtering processing on the amplitude and the phase in the target frequency domain data set, and reconstructing to obtain a plurality of initial time domain second-harmonic intensity images after denoising; and performing adaptive threshold denoising processing on the plurality of initial time domain second-harmonic intensity images to obtain a plurality of target time domain second-harmonic intensity images of the sample. Therefore, by implementing the application, the amplitude and the phase information are jointly processed, the target signal can be more accurately restored, and the imaging quality is improved.

The present disclosure provides an apparatus for laser excitation analysis, comprising: a first mirror, the first mirror being an off-axis parabolic mirror, and the first mirror being configured to focus at least two light beams incident on a reflecting surface thereof at a focal point, wherein the first mirror has at least a preset reflecting area such that an included angle between the two light beams focused at the focal point is capable of continuously varying within a preset angle range; and a monitoring module, the monitoring module being configured to monitor an excitation parameter associated with laser excitation occurring at the focal point.