44 results about "Radiation response" patented technology

The invention discloses a neutron-gamma mixed radiation screening method based on a radiation response signal. The neutron-gamma mixed radiation screening method depends on a nano-coating CMOS sensor neutron measurement system. The neutron measurement system of the nano-coating CMOS sensor comprises a detector, the detector comprises a CMOS sensor; a LiF thin film is attached to the light-sensitive surface of the CMOS sensor; the method comprises the following steps that a part of neutrons enable the CMOS sensor to generate a radiation response signal A; the other part of neutrons and 6Li are subjected to nuclear reaction to generate alpha rays and tritium ions, so that the CMOS sensor respectively generates a radiation response signal B and a radiation response signal C; the gamma ray enables the CMOS sensor to generate a radiation response signal D; and according to the difference of the four radiation response signals in morphology and / or gray values, discriminating the neutron-gamma mixed radiation field. The detector formed by combining the LiF film and the CMOS sensor is used for discriminating a neutron-gamma mixed radiation field and can be used for monitoring nuclear leakage of a reactor.

The invention relates to the technical field of vacuum sintering, and provides an infrared temperature measurement method for a formic acid vacuum furnace, which comprises the following steps: a jig is arranged in the formic acid vacuum furnace, an upper heating pipe and a lower heating pipe of the formic acid vacuum furnace are infrared radiation heating pipes, the jig is of a hollow structure, a workpiece to be measured is placed on the jig, and an upper cover of the vacuum furnace is provided with a plurality of temperature measurement components; a temperature measuring seat of the temperature measuring assembly is provided with an infrared temperature measuring sensor, and the infrared temperature measuring sensor measures temperature through a temperature measuring window; acquiring a plurality of first measurement temperature data; comparing the first measured temperature data with each other, and re-measuring if the first measured temperature data is greater than a threshold value; if so, averaging the first measured temperature data to obtain second measured temperature data; determining a temperature interval according to the second measured temperature data; determining an infrared radiation response value according to the temperature interval; and determining third measurement temperature data according to the infrared radiation response value and a temperature determination formula. The problem that an existing formic acid vacuum furnace is low in infrared temperature measurement precision is solved.

The invention discloses a biological index data processing method and device, a storage medium and computer equipment, relates to the technical field of information processing, and mainly aims to improve the determination efficiency and the determination accuracy of radiation response characteristics of a biological index data set. The method comprises the following steps: acquiring a biological index data set of a skin tissue sample in a non-radiation exposure state; determining the degree of influence of each piece of biological index data in the biological index data set on radiation response characteristic prediction, and screening out core biological index data related to radiation response characteristics from the biological index data set based on the degree of influence; and analyzing the core biological index data by using a preset radiation response characteristic prediction model, and determining radiation response characteristics of the biological index data set based on an analysis result. The method is suitable for processing scenes of the biological index data.

The invention relates to the technical field of hexagonal boron nitride crystal tools, in particular to a variable-temperature tool for testing radiation response of a hexagonal boron nitride crystal. According to the technical scheme, the device comprises a box body for supporting the hexagonal boron nitride crystal, the box body comprises a side plate, a top plate and a bottom plate, the top plate and the bottom plate are installed at the two ends of the side plate, a heating plate is fixedly installed in the side plate, a probe opening is formed in the top plate, a radiation hole is formed in the bottom plate, and a radiation source is fixedly installed on one side of the radiation hole. Precisely controllable probe contact type electric connection is adopted, damage to the surface of the hexagonal boron nitride crystal and a functional coating of the hexagonal boron nitride crystal in a traditional lead welding mode is thoroughly avoided, the integrity of a sample is greatly protected, and the authenticity and accuracy of a test result are ensured.

The invention provides an optical satellite in-orbit radiation calibration frequency determination method, system and device, and relates to the technical field of aerospace remote sensing, and the method comprises the steps: obtaining a radiation response change rate corresponding to a target optical satellite load; based on the radiation calibration mode of the target optical satellite load, performing uncertainty analysis on the calibration result of the target optical satellite load to obtain a single calibration result uncertainty value of the target optical satellite load; and determining a load radiation measurement uncertainty constraint condition of the target optical satellite load, and according to the load radiation measurement uncertainty constraint condition, the radiation response change rate and the single calibration result uncertainty value, calculating to obtain an in-orbit calibration frequency of the target optical satellite load at a preset time scale. According to the invention, the on-orbit calibration efficiency and the resource use benefit are improved.

The invention discloses a synthetic method for preparing a high-performance planar detector and a material by adjusting solvent components, and the method comprises the steps: adjusting the solvent components to prepare a thick film obtained through blade coating of slurry, and carrying out the evaporation of a metal electrode at the upper end of the perovskite thick film. The prepared powder can show an excellent black phase alpha-FAPb I3, then 4.5 M perovskite slurry is prepared by using different solvent component proportions, perovskite powder is added into the solvent components, a perovskite film is prepared by blade coating, growth of the perovskite film in the annealing process is optimized through solvent selection, the quality of the perovskite film is improved, and the perovskite film is suitable for large-scale production. The improvement of the X-ray response of the perovskite film device is promoted; the preparation method of the perovskite material is simple, large-scale preparation is easy, solvent selection is environmentally friendly, and meanwhile, the ray response of a material device can be improved through adjustment of solvent components.

A wastewater treatment system includes an actinic radiation reactor and a concentric tube electrode electrochemical cell in fluid communication between an electrolyte source and the actinic radiation reactor. The electrochemical cell is configured to produce a chlorinated effluent comprising sodium hypochlorite. A conduit fluidly couples an outlet of the electrochemical cell to an inlet of the actinic radiation reactor and is configured to deliver the chlorinated effluent to the actinic radiation reactor.

The invention belongs to the technical field of medical detection, and discloses a method and system for quantifying the relative bioavailability of the internal irradiation dose of a nuclide drug, and the method comprises the steps: dividing the same batch of experimental animals carrying tumors into two groups, and respectively carrying out the internal irradiation of a to-be-detected treatment nuclide drug and the external irradiation of a contrast nuclide drug, radiation damage information and / or radiation response information of the two groups of experimental animals are / is obtained, then the two groups of information are compared, dose pairing is carried out, and finally the relative bioavailability of the internal irradiation dose of the to-be-detected nuclide drug is calculated. The defects that in the prior art, the biological effect of nuclide medicine internal irradiation treatment is greatly different from that of traditional external irradiation radiotherapy, and a means for effectively quantifying the relative bioavailability of the nuclide medicine internal irradiation dose is lacked are overcome. The relative bioavailability of the irradiation dose in the nuclide medicine can be accurately quantified, and a scientific basis is provided for research, development and clinical application of targeted radiopharmaceuticals.

The application discloses a position adaptive method for microwave brightness temperature fast simulation, and relates to the technical field of remote sensing radiation transmission and artificial intelligence. The application adopts a position adaptive U-Net structure, while keeping the advantages of cross-scale feature fusion and skip connection of an encoder-decoder, introduces an LC non-shared convolution layer before the decoding end output, establishes a position-radiation response relationship in units of pixels, and thus significantly enhances the adaptation capability to complex land surface spatial heterogeneity and non-stationarity without explicitly introducing static priors such as surface emissivity and vegetation type. The method of the application takes meteorological variables and observation viewing angle parameters as inputs, takes satellite microwave brightness temperature as a supervision signal, is trained and verified based on the adopted L1 index, and obtains optimal weights by using a learning rate adaptation and an early stopping strategy. The application significantly reduces the processing complexity, improves the spatial structure consistency, and especially performs outstandingly in scenes such as abrupt slope direction, dry-wet transition zone and scanning edge angle.

This application provides a method for damage detection and early warning of conveyor belts based on multispectral vibration sensing, applied in the fields of mine safety monitoring and industrial equipment fault diagnosis. The method includes: collecting the multispectral radiation response and structural vibration response of the conveyor belt during operation; constructing a joint distribution map of energy absorption and phase hysteresis to identify spectral anomaly regions; analyzing the consistency of vibration propagation to locate regions of enhanced vibration reflection or abnormal dissipation; performing spatiotemporal consistency verification on spectral anomalies and vibration distortion characteristics to confirm structural damage and its spatial location; tracking the rate of change of vibration reflection and the spectral spread rate to construct physical criteria for damage evolution and output risk level warnings. This invention, through multispectral and vibration dual-mode fusion detection and spatiotemporal verification, achieves early identification and precise location of internal damage to the conveyor belt, effectively preventing serious accidents such as belt breakage and improving the predictive maintenance level of equipment operation.

A temperature measurement method based on infrared detector parameter adaption, and an electronic device. The method comprises the following steps: acquiring a radiation intensity matrix of a current infrared image, and obtaining a radiation response difference value of the infrared image; determining whether a difference value △F between the radiation response difference value of the infrared image and a preset optimal radiation response difference value is less than a specific threshold, and if not, adjusting a current integration time on the basis of the difference value △F until the difference value between the radiation response difference value of the current infrared image and the preset optimal radiation response difference value is less than the threshold; and outputting a current temperature measurement result on the basis of a radiation intensity-temperature curve corresponding to an integration time sampling point near the current integration time. The current integration time of a detector is adaptively adjusted, so that an optimal infrared image display effect and a maximum temperature measurement accuracy are obtained within a dynamic range of an infrared detector.

The present invention discloses a method and system for autonomously coordinated calibration of the radiation response non-uniformity of an area array camera, which relates to the technical field of area array camera image processing and includes: calculating a distorted mean image based on multiple dark images captured by the area array camera to be calibrated in a lightless environment and multiple response distorted images captured in a uniform brightness field, then performing filtering to obtain a smoothed image, and determining a correction factor image; performing radiation response non-uniformity correction on the distorted uniform image based on the correction factor image to obtain a corrected image; determining whether the variance of the corrected image is less than the variance of the distorted mean image; if so, recording the variance of the corrected image of this filtering, and performing filtering and correction on the corrected image again; using the correction factor image corresponding to the minimum value of the variance of the recorded corrected image as the effective calibration parameter for the radiation response. The present invention alleviates the technical problem that the brightness non-uniformity still exists in the corrected image in the prior art.

The invention provides an Hf and Ce co-doped yttrium lutetium silicate scintillation crystal as well as a preparation method and application thereof, and relates to the technical field of scintillation crystal material preparation. The chemical formula of the yttrium lutetium silicate scintillation crystal is (Hf < x > Ce < y > Y < z > Lu < 1-x-y-z >) < 2 > SiO < 5 >, x is less than or equal to 0.1, 0lt; y is less than or equal to 0.05, 0lt; z is less than or equal to 0.2, and is prepared by co-doping tetravalent Hf ions (Hf < 4 + >) in the lutetium yttrium silicate Ce-doped crystal, the introduction of Hf < 4 + > competes with oxygen vacancies and shallow electron traps in the crystal to capture electrons, and the concentration of the electron traps is effectively reduced, so that the fluorescence and flicker decay time of the crystal is effectively shortened, and the response speed of the crystal to radiation is improved.

A neutron measurement system and method based on a nano-coated pixel sensor, relating to the field of neutron measurement technology. The neutron measurement system based on a nano-coated pixel sensor includes a detector; the detector includes an active pixel sensor; the photosensitive surface of the active pixel sensor is not encapsulated in glass, and the photosensitive surface of the active pixel sensor has a layered neutron conversion material. A neutron measurement method is applied to the neutron measurement system based on a nano-coated pixel sensor; the method is as follows: a neutron undergoes a nuclear reaction with a target element, and the generated alpha rays are incident on the photosensitive surface of the active pixel sensor, causing the active pixel sensor to generate a radiation response signal; the indirect measurement of neutrons is achieved by statistically analyzing the radiation response signal. The advantage of this invention is that by combining a specific neutron conversion material with an active pixel sensor, neutron detection is transformed into alpha particle detection, which is the strength of the active pixel sensor, significantly improving the detection efficiency of neutrons (especially thermal neutrons).

The invention discloses an amphiphilic molecule with diselenide bond linked nitroimidazole and polyethylene glycol and application of the amphiphilic molecule, and belongs to the technical field of medicine. The invention provides an amphiphilic molecule MNZ-Se2-PEG linked with nitroimidazole and polyethylene glycol through a diselenide bond. The structural formula of the amphiphilic molecule MNZ-Se2-PEG is as shown in (I). The amphiphilic molecules can entrap chemotherapeutic drugs through self-assembly to form a drug delivery system. The prepared drug delivery system has the advantages of being capable of keeping the structure stable under physiological conditions, releasing drugs through radiation responsiveness, enhancing sensitivity through radiotherapy and the like, and plays a role in radiotherapy and chemotherapy synergistic treatment. And the prepared drug delivery system has good biological safety. The invention provides a reliable carrier platform for realizing synergistic interaction of chemoradiotherapy, and has excellent development potential of a chemotherapy drug delivery system.

The invention relates to a transformer terminal temperature anomaly automatic detection method and device and a medium, and the method comprises the steps: inputting a visible light RGB image into a lightweight target detection model, and obtaining an initial position detection frame of a transformer terminal in the visible light RGB image; mapping the initial position detection frame to the infrared image to obtain an initial infrared temperature measurement area; in the initial infrared temperature measurement area and the neighborhood thereof, identifying a high-temperature core area based on pixel temperature distribution; performing spatial consistency verification on the high-temperature core area and the initial position detection frame, optimizing the initial position detection frame according to a verification result, and generating an optimized infrared temperature measurement area; based on the radiation response gain and the environment temperature compensation offset, converting the pixel gray value in the optimized infrared temperature measurement area into a temperature value, and calculating the representative temperature of the optimized infrared temperature measurement area; and obtaining a temperature anomaly diagnosis result according to the representative temperature. Compared with the prior art, the method has the advantages of high efficiency, accuracy, light weight and the like.

The invention discloses an infrared sensor physical effect decoupling method based on regularization processing, and the method comprises the steps: carrying out the one-dimensional guide filtering of an infrared image, obtaining a high-frequency component, and carrying out the total variation regularization processing of the high-frequency part; the group minimum pixel intensity sparse prior is combined with a traditional regularization method, a blurring kernel of the imaging system effect is estimated, an infrared image is restored, and sensor photoelectric effect decoupling is completed; compensating signal attenuation according to a sensor gray-radiation response curve to obtain radiation characteristics of a target and a background reaching a receiving end of a detector; and calculating the atmospheric transmissivity after the infrared radiation is absorbed by atmospheric molecules, absorbed and scattered by aerosol and attenuated due to the restriction of meteorological conditions, compensating the generated attenuation, completing the decoupling of the atmospheric attenuation effect at the front end of the sensor, and restoring the real radiation field of the target surface and background. The invention aims to effectively eliminate the photoelectric system effect and the atmospheric transmission effect of the sensor and restore the real radiation field on the surface of the target.

This invention relates to the field of damage assessment technology, specifically to an intelligent assessment method and system for the degree of tumor tissue damage after radiotherapy. The method includes the following steps: based on the radiation dose distribution and voxel grayscale information output by the radiotherapy equipment, temporal pairing and spatial indexing are completed; then, grayscale changes are analyzed to determine the tumor boundary; grayscale and dose characteristics are statistically analyzed layer by layer; spatial localization items of sensitive layers are identified; damage grading parameters are adjusted; and damage grading classification markers are output. This invention dynamically registers the spatial structure of radiation dose with voxel grayscale data to establish a multi-ring layer parameter set for the tumor and adjacent tissues, achieving layered localization and extracting key spatial features. It directly correlates dose distribution differences with damage grading adjustment parameters. Combined with spatial markers and grading standards, it can accurately classify the radiation response of the tumor boundary and adjacent sensitive areas, completing a detailed determination of the damage level and improving the structured expression and multi-dimensional identification capabilities of the assessment results.

The application discloses a kind of fine transient finite element-boundary element high-speed railway rail vibration sound radiation efficient measurement method under mobile load, belong to railway noise simulation, calculation method technical field, by establishing rail discrete support finite element-boundary element model, using APDL command stream method to calculate the transient response under different moving speed, excitation frequency under mobile excitation single-wheel excitation and mobile double-wheel coherent excitation, efficiently obtain the rail vibration response characteristics under mobile load, and calculate the rail transient sound radiation characteristics.The fine transient finite element-boundary element high-speed railway rail vibration sound radiation efficient measurement method under mobile load of the application uses the way of transient calculation command written in APDL language in finite element software ANSYS, and is combined with ACOUSTIC software, efficiently calculates the rail vibration sound radiation response of high-speed railway rail under mobile excitation, higher precision, faster calculation.

The application discloses a malicious eavesdropping and listening device detection method and system based on active signal excitation, and belongs to the technical field of information security and device detection; the method comprises the following steps: step one: collecting environmental electromagnetic signals; collecting environmental electromagnetic radiation signals in a target space to be detected, obtaining original signals of the working state of electronic devices in the environment, and processing the original signals to obtain time domain signals and spectrum signals; step two: candidate signal extraction and tracking; step three: active physical signal excitation; step four: observing the change of radiation signal response; and step five: determining whether a malicious eavesdropping and listening device exists in the environment. The method is used to actively inject excitation signals into the environment to be detected, to induce controllable changes in the working state of malicious devices, and to monitor whether the radiation response of the malicious devices is strongly correlated with the excitation signals, so that the detection and confirmation of the malicious devices are realized.

The invention discloses a multi-source remote sensing data radiation reference construction method based on BRDF correction. The method comprises the following steps: step 1, a reference product screening strategy; screening out a multi-source surface reflectance product with the closest radiation response as a reference product; step 2, BRDF correction is carried out; a physical constraint relation is established in combination with a BRDF model so as to correct directional reflection differences under different observation geometric conditions; step 3, constructing a radiation area network adjustment model; and constructing a local area network radiation unification model based on a least square adjustment principle, and realizing reflectivity equalization among the multi-scene images through radiation connection point joint solution. The method has the advantages that systematic radiation deviation is effectively eliminated under different sensors and observation conditions, regional unified calibration of the surface reflectance is achieved, and multi-source satellite images in a large-range region have high radiation consistency and time sequence stability. The invention further discloses application of the radiation reference.

The present application relates to the field of optical measurement, and discloses a determination method, device and equipment of downlink light irradiance, a correction method of optical remote sensing data and an optical remote sensing system, the determination method of downlink light irradiance is applied to a flight equipment provided with a downlink light sensor, and comprises the following steps: creating a radiation response equation of the corresponding relationship between the radiation response value of the downlink light sensor and the corresponding horizontal plane total irradiance in advance; the radiation response value in the radiation response equation is equal to the superposition of the response value of the downlink light sensor to direct light and the response value of scattered light; according to the current radiation response value collected by the downlink light sensor and the radiation response equation, the current horizontal plane total irradiance of the downlink light corresponding to the current radiation response value is determined. The radiation response equation in the present application can more accurately determine the horizontal plane total irradiance of the downlink light, which is beneficial to the accuracy of radiation correction of optical remote sensing data.

This invention discloses a method for optimizing the layout of photovoltaic green facades based on light radiation response and visual continuity constraints. The method includes: S1, facade discretization and calculation of total annual light radiation; S2, constructing a parameterized facade module model, defining a type gene and a length parameter gene for each cell; S3, establishing a multi-objective optimization function model: a life-cycle cost function, a net carbon emission function, and a visual discontinuity penalty function; S4, employing a multi-objective evolutionary algorithm, minimizing each objective function in the multi-objective optimization function model, iteratively optimizing the population composed of the type genes and length parameter genes of all cells to obtain a Pareto optimal solution set; S5, selecting a solution from the Pareto optimal solution set for photovoltaic and green facade layout. This invention enables refined calculations based on microscopic light environment conditions, balances the dual objectives of cost and carbon reduction, and ensures that the facade visual effect presents natural, continuous, and gradual characteristics.

The application provides a kind of optical satellite in-orbit radiation calibration frequency determination method, system and equipment, it is related to aerospace remote sensing technical field, the method comprises: obtaining the radiation response rate of change corresponding to target optical satellite load;Based on the radiation calibration mode of the target optical satellite load, the calibration result of the target optical satellite load is analyzed, and the single calibration result uncertainty value of the target optical satellite load is obtained;Determine the load radiometric uncertainty constraint condition of the target optical satellite load, and according to the load radiometric uncertainty constraint condition, the radiation response rate of change and the single calibration result uncertainty value, the in-orbit calibration frequency of the target optical satellite load in preset time scale is obtained.The application improves in-orbit calibration efficiency and resource use benefit.

The invention provides a cyclic production method of medical isotope 67Cu, which comprises the following steps: S1, carrying out radiation reaction on a target material solution containing 68Zn or 67Zn in a reactor to obtain a target material solution containing 67Cu; s2, the solution containing the 67Cu target material is introduced into a first extraction unit, and 67Cu is adsorbed and enriched through a chromatographic column; when the first extraction unit reaches an adsorption limit value, the 67Cu-containing target material solution is introduced into a second extraction unit, and adsorption and enrichment of 67Cu are continued by using a chromatographic column; in the adsorption and enrichment process, the solution subjected to adsorption and enrichment returns to the reactor again for irradiation reaction; the adsorption-irradiation operation is circulated; and S3, alternately desorbing 67Cu obtained through online enrichment and separation of the first extraction sheet and the second extraction sheet, purifying the 67Cu through a separation column filled with anion exchange resin or extraction resin, and removing residual 68Zn or 67Zn and other impurities to obtain a 67Cu solution with high nuclear purity, high specific activity and high radiochemical purity.

The invention discloses a design method and application of a mid-infrared long-distance passive distance measurement system, and belongs to the technical field of infrared imaging measurement, and high-precision passive distance measurement with the distance range covering 1-10 km is achieved. The designed mid-infrared long-distance passive ranging system is composed of an infrared thermal imaging system, a mobile platform, a signal processing unit and a power supply. Wherein the electric rotating wheel is fixedly mounted in a light path between the lens and the movement, has a quick switching characteristic, and completes dual-band image acquisition in an extremely short time. In the system application, a distance measurement formula is established by using the radiance ratio relation of the two wavebands, and the radiation response error shared by the two wavebands is offset by collecting the imaging gray scale difference value, so that the accuracy and reliability of the distance measurement result are improved. The mid-infrared long-distance passive distance measuring system has the advantages of being high in distance measuring precision, flexible and convenient and fast to operate.

The present invention belongs to the technical field of space target temperature inversion, and particularly relates to a space target temperature inversion system and method for a strong skylight background. The method includes: S1: obtaining the infrared radiation response rate and atmospheric extinction coefficient of the space target temperature inversion system based on the atmospheric extinction model, and calculating the irradiance of the target to be measured under each spectral channel of the high-speed rotating filter wheel based on the infrared radiation response rate and atmospheric extinction coefficient; S2: constructing a functional relationship between the material emissivity and surface temperature of the target surface element under each spectral channel based on the irradiance under each spectral channel; S3: solving the radiance under each spectral channel by using a blind optimization algorithm based on the functional relationship in step S2 to obtain the temperature inversion result of the target to be measured. The present invention performs blind optimization on the spectral material emissivity of the material, realizes real-time detection of low-temperature space targets, and inversely calculates the temperature distribution of complex materials (materials with different emissivities).

The present invention belongs to the field of biomedicine, and specifically relates to radiation-responsive self-assembling polypeptides, their hydrogels and applications. The radiation-responsive self-assembling polypeptide derivative hydrogel of the present invention has the advantages of simple synthesis method, good biocompatibility, and easy loading of drugs. The hydrogel can trigger pulsed drug release through radiation response, precisely regulate the release rate of drugs in a controllable time and space, and enhance the synergistic effect of radiotherapy and drug therapy. Due to its high biosafety, it can avoid long-term negative effects on the human body and has a very broad application prospect. Therefore, the radiation-responsive polypeptide hydrogel of the present invention can be widely used in the treatment of radiation-related diseases such as combined tumor radiotherapy, postoperative tissue repair and regeneration, nuclear drug delivery and nuclear medicine image-guided therapy, providing a more accurate and effective synergistic treatment plan.

This invention relates to a binary signaling scheme for use in a transmitter comprising a semiconductor radiation source where the driving current and thus also the radiation output level is modulated by switching the driving current on and off. However, the modulation of the driving current is adapted to not wait for the radiation response to follow the complete rise or fall curve but to switch between two (or a larger number of) selected radiation output levels. During prolonged sequences of zeros (or ones), the driving current is switched to keep the radiation output level between a certain minimum and maximum level. This range of radiation output levels is adaptively selected in accordance with characteristics of the driving current, the optical transmission channel, the radiation source and / or the radiation detector.