58 results about "Spectral emission" patented technology

Some aspects of the present disclosure provide methods and devices that enable a framework for selection or configuration, or both, of a waveform for use in integrated sensing and communications (ISAC). Use of the framework provides a new waveform, based in part on various criteria, which provides a trade-off among different ISAC requirements. Therefore, when different criteria are important for a particular implementation, a waveform that best meets the requirement of those criteria may be used. The various criteria may include factors such as hardware constraints at the UE, radio frequency (RF) chirp generation or detections capability at the UE, spectral emission or leakage such as OOBE, sensing performance, and sensing complexity. In some embodiments, a cyclic prefix (CP) is provided to use the chirp-based sensing waveforms as a demodulated reference signal (DMRS). In some embodiments, the CP enables alignment with a communication signal frame.

The invention relates to the technical field of image processing, and discloses a tea maturity detection method and system, and the method comprises the steps: obtaining an original image of tea in a natural illumination imaging environment; generating a global illumination difference chart representing an ambient illumination state, and performing illumination compensation on the to-be-detected area of the tea in the original image to obtain a compensated image of the tea; performing gray scale range adjustment on the compensated image of the tea leaves to obtain an enhanced spectral image of the tea leaves; integrating the color and spectral characteristics of the specific spectral reflection characteristics of the tea leaves with different maturity degrees in the enhanced spectral image and the three-dimensional morphological characteristics reflecting the spreading degree and thickness of the tea leaves into the fusion image characteristics of the tea leaves; mapping the color spectrum emission characteristics and texture characteristics of the tea leaves in the enhanced spectrum image to a maturity discrimination knowledge base of the tea leaves to obtain a preliminary maturity result; performing confidence coefficient weighting on the preliminary maturity result to obtain a target maturity; according to the invention, the tea maturity detection efficiency can be improved.

The invention belongs to the technical field of quantitative remote sensing, and relates to a mid-infrared hyperspectral emission and reflection characteristic integrated inversion method, which comprises the following steps: acquiring mid-infrared hyperspectral satellite remote sensing data, and optimizing sensing entrance pupil radiance data to obtain optimized entrance pupil radiance data; the intermediate infrared hyperspectral satellite remote sensing data comprises sensing entrance pupil radiance data; performing atmospheric correction on the optimized entrance pupil radiance data by using a radiation transfer model to obtain surface brightness temperature and atmospheric downward radiation, and calculating solar irradiance reaching the surface; constructing a mid-infrared hyperspectral earth surface bi-directional reflectivity inversion framework, and performing earth surface bi-directional reflectivity inversion based on the mid-infrared hyperspectral earth surface bi-directional reflectivity inversion framework to obtain earth surface bi-directional reflectivity and earth surface equivalent radiance; constructing a scene self-adaptive framework, and performing inversion based on the scene self-adaptive framework to obtain the surface temperature and the surface emissivity; therefore, accurate separation of surface emission radiation and surface reflection radiation is completed.

The invention discloses a multi-spectral radiation temperature measurement method and system for improving a quantum particle swarm, relates to the field of radiation temperature measurement and photoelectric signal processing, and solves the problems that when an existing standard PSO algorithm is applied to high-dimensional and nonlinear multi-spectral inversion, local extreme values are likely to be trapped, and the self-adaptive capacity is poor. Setting parameters, generating an initial particle position by using Tent chaotic mapping, calculating the particle fitness of an initialized population, updating initial individual optimum and global optimum, and calculating an average optimal particle position; updating the optimal particle position through a Levy flight mechanism; and repeating the steps, calculating the multispectral radiation temperature measurement target function value of the updated position, updating the initial individual optimum and the global optimum, and if an error threshold value or the maximum number of iterations is met, outputting the global optimum solution. The method is also suitable for the application field of inverting the real temperature and the spectral emissivity of the target from the multi-channel spectral radiation signals and the like.

A method of analyzing an interference peak of a sample spectrum generated using a detector of an optical spectrometer is provided. The interference peak is produced by a plurality of spectral emissions of different wavelengths. The method includes generating, based on a model of expected curve parameters of the optical spectrometer and a location of the sample peak on the detector of the optical spectrometer, interference curve parameters representing a shape of each spectral emission in the interference peak. The method further includes fitting a plurality of curves to the interference peak, each curve corresponding to one of the plurality of spectral emissions of different wavelengths that form the interference peak, wherein each curve is fitted using the interference curve parameters provided by the model of expected peak parameters. The plurality of curves are output for further analysis.

Offset illumination using multiple emitters in a fluorescence imaging system is described. The system includes an emitter to emit pulses of electromagnetic radiation and an image sensor including an array of pixels to sense reflected electromagnetic radiation. The emitter includes a first emitter and a second emitter to emit electromagnetic radiation of different wavelengths. The system causes at least a portion of the pulses of electromagnetic radiation emitted by the emitter to include one or more of a hyperspectral emission, a fluorescence emission, or a laser mapping mode.

This solution relates to the coatings field and proposes an aqueous nano-dispersion of far-infrared negative oxygen ion material. By weight, it comprises: 300-350 parts water; 35-45 parts wetting agent; 40-60 parts dispersant; 25-35 parts defoamer; 35-45 parts multifunctional additive; 5-7 parts thickener; 400-600 parts activated far-infrared negative oxygen ion material; 1-3 parts accelerator; and 3-5 parts shielding agent. This solution designs a multi-component synergistically promoting activated far-infrared negative oxygen ion material, which can improve the hemispherical spectral emissivity in the 4-14μm band, even reaching above 0.95 in the key 8-12μm band, effectively promoting formaldehyde decomposition with a long-lasting effect, while also improving antibacterial properties.

The invention discloses a gas analyzer based on infrared spectrum and an indication error calibration method. The method comprises the following steps: respectively mounting a spectrum transmitting end and a spectrum receiving end on two sides of a calibration tube; standard gas with the same concentration and different injection operation parameters is injected into each calibration pipe, infrared light is emitted into the calibration pipes at the same time, the light intensity of the infrared light passing through the gas in the calibration pipes and received by a spectrum receiving end is analyzed, and the measurement and calculation value of the concentration of the standard gas is obtained in combination with the absorption law; constructing a calibration model between the concentration measurement and calculation value and the injection operation parameters; injecting to-be-detected gas into each calibration pipe according to the same injection operation parameters, and correcting the measured concentration of the to-be-detected gas based on the injection operation parameters and the calibration model; based on the influence coefficient of the injection operation parameters on gas concentration measurement, the measurement concentration of the to-be-measured gas with unknown concentration is corrected, and the measurement accuracy of the gas concentration is improved.

The application relates to a virtual reality-based intangible cultural heritage immersive experience method, device, equipment and medium. The method comprises the following steps: acquiring multidimensional data of a target intangible cultural heritage scene; performing grid processing on original three-dimensional point cloud data to obtain an initial three-dimensional geometric model; performing spatial registration on a spectral reflection curve and the initial three-dimensional geometric model to obtain a three-dimensional geometric model containing material spectral properties; analyzing a facet spectral emission curve in combination with a scene space-time cultural database to generate a parameterized physical material library; generating a basic light image in combination with the parameterized physical material library and the scene space-time cultural database according to experience space-time information selected by a user; fusing environmental special effect physical description parameters and the basic light image to obtain a synthesized visual picture result; and generating an immersive experience instruction based on the synthesized visual picture result and environmental special effect data. The method can dynamically adapt to material characteristics and space-time changes of different intangible cultural heritage scenes, and improves the restoration degree of the intangible cultural heritage scene and the user immersion.

The present application relates to the technical field of image processing, and discloses a tea maturity detection method and system, the method comprising: acquiring an original image of tea under an imaging environment of natural light; generating a global light difference map representing the state of the ambient light, and performing light compensation on a tea region to be detected in the original image to obtain a compensated image of the tea; adjusting the gray scale range of the compensated image of the tea to obtain an enhanced spectral image of the tea; integrating the color and spectral features of the specific spectral reflection characteristics of tea leaves of different maturity in the enhanced spectral image with three-dimensional morphological features reflecting the spread and thickness of tea leaves into a fusion image feature of the tea; mapping the color and spectral emission characteristics and texture features of the tea in the enhanced spectral image to a maturity discrimination knowledge base of the tea to obtain a preliminary maturity result; and performing confidence weighting on the preliminary maturity result to obtain a target maturity; the present application can improve the efficiency of tea maturity detection.

The application discloses a kind of symmetric narrow-band spectral image driven multi-primary color display method and device, it is related to color image display technical field, method includes: based on the spectral reflectivity of target to be photographed calculation three stimulus value;Based on the spectral transmittance of any channel in the narrow-band spectral camera to be used, the spectral emission power of corresponding primary color channel in the multi-primary color display screen to be used and the spectral reflectivity of target to be photographed, the three stimulus value of color output by the multi-primary color display screen to be used is calculated;According to the three stimulus value of target to be photographed and the three stimulus value of color output by the multi-primary color display screen to be used, color difference data is calculated;Based on color difference data, the center wavelength and bandwidth of any channel in the narrow-band spectral camera to be used are adjusted;Image shooting is carried out to target to be photographed by the adjusted narrow-band spectral camera to be used, and the image obtained by shooting is used as the driving image of the multi-primary color display screen to be used, to obtain target color display image.The application improves the accuracy of color reproduction of color target scene.

This technology provides a way to suppress the decrease in accuracy of temperature measurements. [Solution] A wavelength selection method for a system that measures temperature based on a first optical component and a second optical component spectrally separated from synchrotron radiation of an object to be measured 100, comprising the steps of: obtaining a first spectral emissivity showing the relationship between wavelength and emissivity at a first temperature, and a second spectral emissivity showing the relationship between wavelength and emissivity at a second temperature different from the first temperature, for a reference object of the object to be measured 100; obtaining a wavelength band in which the difference between the emissivity of the reference object at the first temperature and the emissivity of the reference object at the second temperature is less than or equal to a predetermined threshold, based on the first and second spectral emissivity; and selecting the first wavelength and the second wavelength from the wavelength band.

The invention relates to an organic compound, and also relates to an organic electroluminescent device adopting the organic compound. The organic compound provided by the invention has a structure as shown in a formula (I). The compound disclosed by the invention has the characteristics of high luminous efficiency, narrow spectrum emission and high stability, and an organic electroluminescent device adopting the compound disclosed by the invention is higher in external quantum efficiency and longer in service life.

The invention relates to a non-missing immersive experience method and device based on virtual reality, equipment and a medium. The method comprises the following steps: acquiring multi-dimensional data of a target non-missing scene; gridding the original three-dimensional point cloud data to obtain an initial three-dimensional geometric model; performing spatial registration on the spectral reflection curve and the initial three-dimensional geometric model to obtain a three-dimensional geometric model containing material spectral attributes; analyzing the patch spectral emission curve in combination with the scene space-time culture database, and generating a parameterized physical material library; generating a basic shadow image according to experience space-time information selected by a user in combination with the parameterized physical material library and the scene space-time culture database; fusing the environment special effect physical description parameters and the basic shadow image to obtain a synthetic visual picture result; and generating an immersive experience instruction based on the synthesized visual picture result and the environmental special effect data. The method can dynamically adapt to the material characteristics and spatial-temporal changes of different non-abandoned scenes, and improves the restoration degree of the non-abandoned scenes and the immersion of a user.

The present application relates to a kind of night sea surface visual reconstruction method and system based on physical information network, method includes: obtaining the hyperspectral thermal radiation data of night sea surface and pre-processing;Preliminary feature extraction is carried out to the data after pre-processing, and preliminary feature map is obtained;Channel attention processing and spatial attention processing are carried out to preliminary feature map respectively, and channel weight and spatial weight are obtained;Based on channel weight and spatial weight, weighted feature is calculated;Characteristic enhancement and multi-scale feature fusion are carried out, and multi-scale fusion feature is obtained;Based on multi-scale fusion feature, temperature branch prediction, spectral emissivity branch prediction and texture branch prediction are carried out;Based on temperature predicted value, saturation is calculated;Based on spectral emissivity predicted value, hue is calculated;Based on texture predicted value, brightness is calculated;Further image transformation is carried out, and it is obtained that class daytime monitoring image.Compared with prior art, the present application has the advantages of high target detection precision.

The present application relates to a kind of multispectral temperature measurement method based on optimization thought, belong to the field of spectral temperature measurement and non-contact temperature measurement.The present application establishes the relationship between temperature and spectral signal, establishes multivariate temperature difference correlation function, solves correlation function, establishes temperature measurement model, optimizes model solution, realizes temperature inversion.The present application simplifies the modeling process into the optimization problem of multivariate temperature difference correlation function, avoids the relationship assumption of spectral emissivity and other physical quantities, reduces the data sample amount requirement of deep learning method, simplifies the process of multispectral temperature measurement.The present application has improved inversion accuracy compared with secondary measurement method and neural network method;Inversion speed is greatly improved compared with SMM method.

The application discloses a kind of composite structure fluorescent glass and its high-power packaging lighting light source, belong to luminescent material and semiconductor lighting technical field.The fluorescent glass with quartz glass as substrate, by screen printing, low melting point glass powder and three primary color phosphor slurry prepared according to proportion is coated on the rough surface of substrate, uniform fluorescent film is formed after low temperature sintering.The fluorescent glass and multi-color composite chip are assembled to form high-power packaging lighting light source in remote flip-chip mode, realize full spectrum emission.The application proposes refractive index gradient and micro-nano composite light extraction structure, and develops high-thermal-conductivity anti-erosion protective film.The fluorescent glass prepared by the application has the advantages of high color rendering index (Ra≥90), luminous efficiency > 150 lm / W, color temperature close to sunny morning light (about 5285K), good thermal stability, etc., and the preparation process is simple, low in cost, suitable for high-power LED lighting field.

The application discloses alkali metal doped perovskite single crystal material and a preparation method and application thereof. A high-concentration alkali metal halide is introduced into a perovskite aqueous phase precursor, and an alkali metal doped perovskite single crystal is precipitated through a cooling method. The traditional cesium lead bromide perovskite light emitting wavelength band is near 520 nm, and wide spectrum emission cannot be realized. The scheme can prepare a centimeter level perovskite CsPb2Br5 single crystal with wide spectrum emission. Test results show that the alkali metal doped perovskite CsPb2Br5 single crystal fluorescence spectrum covers a visible light and near infrared light wavelength band (500-1000 nm).

The invention provides an in-situ mid-infrared emissivity testing device and a testing method. The in-situ mid-infrared emissivity testing device comprises a sample heating device, an optical device, a calibration device, a sample bearing device, a temperature measuring device and the like. The in-situ testing device and the matched testing method can realize real-time and accurate measurement of infrared band spectral emissivity and temperature in the material under extreme conditions of vacuum, high temperature, non-equilibrium solidification and the like, and are suitable for material research and development and process optimization in the fields of aerospace, high-end manufacturing and the like.

This invention discloses a broadband luminescent material of nitrogen oxides, wherein the chemical composition of the full-spectrum luminescent material is M. 1‑ x Al a Si b O 7−b N a+2b−4 : x RE 2+ Wherein, M is selected from one or more of Ca, Sr, and Ba; RE is selected from at least two or more of Eu, Sm, and Yb; RE 2+ For luminescent central ions, 0.001 ≤ x ≤ 0.02. This invention also provides a preparation method for the target material, which is prepared through grinding, pre-calcination, calcination, and post-treatment steps. This luminescent material can be excited by a 365-420nm near-ultraviolet / violet light chip, and its emission spectrum covers 380-900nm, achieving broadband full-spectrum emission of blue-green-red light composites. It can effectively fill the cyan "gap" in the full spectrum and reduce the use of other commercial powders, and can be used as a fluorescence conversion material, showing great application potential in full-spectrum lighting and high-power laser lighting.

A disclosure of this specification provides a method comprising: determining, by a UE, a maximum output power, based on A-MPR; and performing transmission of a Physical Sidelink Feedback Channel (PSFCH), based on the maximum output power, wherein the A-MPR is for a Network Signal 33 (NS_33), the PSFCH, and intra-band Carrier Aggregation (CA), wherein the A-MPR is based on i) whether the UE supports dual Power Amplifier (PA) architecture, ii) power class of the UE, iii) carrier frequency combination, and iv) whether Spectral Emission Mask (SEM) requirement related to the third-order intermodulation products (IM3) is inner frequency or outer frequency.

The present application relates to an organic compound, and also relates to an organic electroluminescent device using the same.The organic compound of the present application has a structure shown in the following formula.The compound of the present application has the characteristics of high luminous efficiency, narrow light spectrum emission and high stability, and the organic electroluminescent device using the compound of the present application has higher external quantum efficiency and longer device life.

The invention discloses a non-contact measurement method and system for emissivity of an ultrahigh-temperature multiband material. The non-contact measurement method comprises the following steps: acquiring a transient multispectral radiance image sequence of the surface of a measured material; constructing a spatio-temporal evolution perception neural network model with an embedded micro-optical calculation layer, and training by adopting a strategy based on physical information constraint; and inputting an image sequence acquired in real time into the trained model, outputting a spectral emissivity estimation value, and calculating the surface true temperature in combination with the measured radiation brightness. According to the method, the deep learning model embedded in the physical mechanism is constructed, the irregular distortion characteristic of the emissivity in the dynamic ablation process of the material is directly learned, the technical problem that a traditional temperature measurement method fails due to model mismatch is solved, and the accuracy and robustness of true temperature and emissivity decoupling are improved.

The invention relates to a method for determining silicon dioxide in quartz glass based on a high-temperature melting reaction-inductively coupled plasma atomic emission spectrometer. The method comprises the following steps: crushing and grinding a sample into powder; adding a strong alkali flux into the obtained powdery sample, and uniformly mixing to obtain a mixture; melting the mixture at high temperature; leaching reactants with hot water and fixing the volume; drawing a silicon element concentration-spectral line emission intensity standard curve; testing the content of silicon in the sample solution; and calculating the content of silicon dioxide according to the measured content of silicon. The method comprises the following steps: adding a strong alkali solvent into a powdery sample obtained by grinding the sample, carrying out a high-temperature melting reaction, heating water to dissolve a reactant, and determining the content of silicon in the solution by adopting an inductively coupled plasma atomic emission spectrometer, so as to calculate the content of silicon dioxide in the quartz glass sample.

A multispectral emission device includes at least one transmitting unit for LiDAR radiation, one receiving unit for LiDAR radiation, and at least a LiDAR radiation manipulating device, and a radar radiation manipulating device. The LiDAR radiation manipulating device and the transmitting unit for LiDAR-S are arranged such that the LiDAR radiation manipulating device redirects LiDAR radiation emitted by the transmitting unit for LiDAR radiation and the LiDAR radiation manipulating device is set up such that LiDAR radiation passing through the headlight cover from the outside is guided to the receiving unit for LiDAR radiation. The radar radiation manipulating device is set up such that radar radiation passing through the headlight cover from the outside is guided to the receiving unit for radar radiation. The transmitting unit for LiDAR radiation, the LiDAR radiation manipulating device, the radar module, and the radar radiation manipulating device are arranged such that at least one radiation cone of diverted LiDAR radiation and at least one radiation cone of diverted radar radiation are aligned.

The invention belongs to the field of wave-absorbing materials and electromagnetic protection materials, and particularly relates to a perovskite material with microwave absorption and radiation heat dissipation functions and a preparation method and application thereof. The perovskite material provided by the invention has a chemical formula shown as the following: Sr < x > Co < y > M < z > On, m is one or more of La, Ce, Sm, Gd, Er and Lu; 0.2 < = x < = 1.2; 0.2 < = y < = 1.0; z is 0 < = z < = 0.2; 1 < = n < = 3. The perovskite material disclosed by the invention has an adjustable strong absorption characteristic in a microwave frequency band of 1-18GHz, the spectral emissivity of the perovskite material in an infrared band of 1.5-25mu m at room temperature is greater than 90%, the perovskite material shows the characteristics of high infrared emissivity and low microwave reflection loss, and the perovskite material can still keep stable performance at high temperature; the material has wide application prospects in thermal management and electromagnetic protection materials of mobile communication base stations and wave-absorbing materials of aerospace crafts.

There is provided a system and method for determining external and / or internal attributes of an object using hyperspectral imaging, while taking into consideration changes in the spectral emission profile of the light source used for the imaging.

The present application provides a kind of boron-nitrogen compound and its preparation method and application, the boron-nitrogen compound has as shown in structure formula I, the boron-nitrogen compound of the present application is by expanding conjugation, introduce nitrogen atom, not only realizes the fine adjustment of spectrum but also further improves the luminous efficiency.The boron-nitrogen compound of the present application has narrow spectrum, as narrow spectrum luminescent material is used to prepare the light-emitting layer of organic electroluminescent device, the organic electroluminescent device prepared thereby realizes narrow spectrum TADF emission, and makes the electroluminescent external quantum efficiency of device be as high as 35% or more.

The present application provides a boron-nitrogen compound, a preparation method and application thereof, the boron-nitrogen compound has a narrow spectrum, and is used as a narrow spectrum light emitting material to prepare a light emitting layer of an organic electroluminescent device, so that the organic electroluminescent device prepared by the boron-nitrogen compound realizes narrow spectrum TADF emission, and makes the electroluminescent external quantum efficiency of the device as high as more than 35%.

There is provided a system and method for determining external and / or internal attributes of an object using hyperspectral imaging, while taking into consideration changes in the spectral emission profile of the light source used for the imaging.