50 results about "External irradiation" patented technology

The invention discloses a spatial projection regularization method for sound source localization and sound field reconstruction and a related device, and belongs to the technical field of sound source localization. Specifically, according to the method, an equivalent source method model is utilized, and an external radiation sound field of a sound source to be measured is simulated through a series of virtual sources. Then, according to the first sound pressure transfer matrix from the virtual source arrangement surface to the holographic measuring point plane and the sound pressure of the holographic measuring point, a space projection regularization algorithm is used for solving the inverse problem, and therefore the equivalent source intensity is obtained; and then, reconstructing an external radiation sound field of the sound source to be detected by using the second sound pressure transfer matrix and the equivalent source intensity. And finally, by taking the maximum sound pressure amplitude as a standard, screening field points in an external radiation sound field so as to determine the position of the sound source to be detected. According to the space projection regularization algorithm, truncation processing of the vector space is carried out with the projection size of the measurement information in the vector space as the criterion, real information is reserved, and noise interference is restrained to the maximum extent.

The invention relates to a method for evaluating the radiation dose of special public nearby a nuclear facility, and the method comprises the steps: estimating the concentration distribution of radionuclides in air, surface soil and a biological medium nearby the nuclear facility through collecting the radiation dose evaluation parameters of a target special public and combining an environment quality evaluation model; based on the data, the annual effective dose of the target special public at the nuclear facility boundary and the living quarter is calculated, and a plurality of ways such as inhalation internal irradiation, air immersion external irradiation, surface deposition external irradiation and ingestion internal irradiation are considered. In addition, a dynamic calculation method is also introduced, especially for the influence of year-by-year change of the cumulant of radionuclides deposited on the earth surface, factors such as decay, resuspension and infiltration into underground water of nuclides are fully considered, and the accuracy and foresight of evaluation are improved. Accurate and comprehensive technical support is provided for radiation protection of the special public around the nuclear facility, and the requirements of the nuclear facility public for dose monitoring and risk management are met.

The invention discloses a gradient thermocouple liquid level real-time detector, and relates to the technical field of liquid level detection, an integrated gradient thermocouple probe rod structure is adopted, a plurality of groups of thermocouple nodes are integrated on a single corrosion-resistant alloy integrated gradient thermocouple probe rod according to a preset interval through a special process, and a continuous temperature gradient sensitive area is formed. A high-precision signal processing circuit is embedded in the integrated gradient thermocouple probe rod, the temperature difference potential of each node is collected in real time, the liquid level height is calculated based on a dynamic temperature field modeling algorithm, and full-scale continuous measurement is achieved. Gradient node distributed layout is created for the first time, and a blind area of traditional point type measurement is eliminated; a self-adaptive temperature compensation mechanism is developed, and medium layering and boiling interference are overcome; the integrated gradient thermocouple probe rod adopts vacuum sealing and a nanometer heat insulation coating, and can resist a high temperature of 600 DEG C and a high pressure environment of 40 MPa. The device has millimeter-level measurement precision and millisecond-level dynamic response capability, does not need to move parts or external radiation sources, and remarkably improves the reliability, safety and installation convenience of liquid level monitoring of industrial reaction kettles and high-pressure boilers under extreme working conditions.

The invention discloses a passive radar target positioning method and system based on an external radiation source, and relates to the technical field of radar positioning, and the method comprises the steps: screening an external radiation source signal set of a target monitoring region, laying a distributed receiving antenna array based on the signal set, receiving a signal in real time, and transmitting the signal to a quality evaluation unit; the quality evaluation unit adaptively screens the signal and outputs a standard radiation source signal with a radiation source type identifier; and carrying out feature parameter extraction on the standard signal to obtain a multivariate signal feature set, and carrying out multi-band signal fusion and target positioning analysis based on the feature set to generate target position information. According to the invention, the technical problems of complex signal processing, insufficient positioning precision and limited dynamic monitoring capability of the existing passive radar technology in a complex electromagnetic environment are solved, and multi-band signal fusion and adaptive signal processing are realized. And the positioning precision and the dynamic monitoring capability of the passive radar in a complex environment are improved.

The present invention belongs to the technical field of radioactive target decontamination, and particularly relates to a target contamination removal and sampling device for decontaminating and sampling a radioactive target (4) inside a glove box. The device includes a clamping mechanism and a wiping mechanism mounted on a rectangular system chassis (1). The clamping mechanism is used to fix the cylindrical target (4), and the wiping mechanism is used to wipe the target (4). In the decontamination and sampling operations of the target, the present invention reduces the finger tip dose and the whole body external irradiation dose of the operator, improves the decontamination effect, and simplifies the operation.

The invention discloses a train flame-retardant material fire spreading experiment device and an experiment method, relates to the technical field of flame-retardant material experiments, and solves the technical problem that the authenticity of a fire spreading process is affected due to the fact that an existing experiment device is difficult to simulate a gradually-changed heat radiation area at present. The device comprises a sample fixing assembly, a heat radiation shielding assembly and an external heat radiation assembly which are sequentially arranged from bottom to top, the upper portion of the heat radiation shielding assembly is fixed to the lower portion of the external heat radiation assembly, and the sample fixing assembly is used for clamping and fixing different types of flame-retardant material test pieces; the external heat radiation assembly is used for simulating an external radiation heat source, and the heat radiation shielding assembly is used for controlling the exposure time and the exposure area of the external heat radiation assembly; the objective of the invention is to realize active and accurate regulation and control of key influence factors in the fire spreading process.

The utility model discloses a laser film UV printing part, which relates to the technical field of processing equipment and comprises a drying processing box and a film material, and a plurality of external irradiation lamp bodies are arranged on two sides of the inner wall of the drying processing box. An upper material guide roller in the drying treatment box and a bearing frame at the bottom of the drying treatment box are matched with driving equipment for use to drive a film material to pass through the drying treatment box, and at the moment, external irradiation lamp bodies on the inner walls of the two sides in the drying treatment box can perform curing irradiation on the outer surface of the film material when the film material moves in the drying treatment box; the inner irradiation lamp body is arranged in the drying treatment box, so that the inner surface of the film material can be cured and irradiated when the film material moves in the drying treatment box, and the printing ink permeating from the upper surface to the lower surface can be quickly dried; and when the film material enters the drying treatment box and then comes out of the drying treatment box, the advancing time can be prolonged.

The application belongs to the technical field of biological medicine, and particularly relates to an ultrathin radioactive patch for skin cancer treatment and a preparation method thereof. The preparation method comprises the following steps: adding a photoinitiator solution into a methyl methacrylate gelatin solution, and performing water bath heating dissolution under light shielding conditions; after the dissolution is completed, mixing the radioactive particles used for external irradiation treatment, stirring to a semi-solid state, smearing to a patch bottom film by using a smearing part, covering the patch anti-adhesion paper on the surface, irradiating and curing by using a light source, and obtaining the ultrathin radioactive patch. The patch prepared by the application can be customized according to the size and shape of a lesion site, a corresponding bottom film is cut out and attached to the lesion site, and smearing is directly performed. Compared with a common radioactive hydrogel, the preparation method is simpler, the preparation time is shorter, and the efficiency is higher.

The invention discloses a finite box rectangular horn shape optimization method and system based on a hybrid model, and the method comprises the steps: carrying out the geometric discretization of a rectangular horn in the axial direction into rectangular pipeline sections which are connected end to end, and determining a to-be-optimized design variable; pre-calculating a radiation impedance matrix and a far-field directivity primary function vector under a finite box body by adopting an external radiation model; calculating an inlet impedance matrix and a speed transmission matrix of each rectangular pipeline section on the basis of a radiation impedance matrix and a current design variable by adopting a sound transmission model in the horn, obtaining a mouth output speed vector, and solving an acoustic performance index in combination with a far-field directivity primary function vector; and constructing a comprehensive objective function, and solving to obtain a finite box rectangular horn shape optimization scheme. According to the method, the edge diffraction and sound reflection effect in a limited box environment can be accurately simulated, and the radiation efficiency optimization and directivity control of the broadband of the rectangular horn are realized while the calculation cost is remarkably reduced.

The invention belongs to the technical field of biomedical nano-drugs, and discloses a radionuclide-labeled nano combined therapeutic agent with radiosensitization and a preparation method and application thereof, the bismuth oxyiodide nano combined therapeutic agent comprises a nano-particle carrier and radionuclides distributed in crystal lattices of the nano-particle carrier; the nano-particle carrier is bismuth oxyiodide of which the surface is coated with polyvinylpyrrolidone with negative charges; and the radionuclide adopts nuclide with a short half-life period. According to the invention, short-half-life nuclide is efficiently loaded through the bismuth oxyiodide BiOI nano-carrier, and a novel efficient and low-toxicity radiopharmaceutical strategy is provided for tumor treatment by combining radiation sensibilization and external irradiation synergism.

1. The name of the design product: house (chest examination safety cabin). 2. The use of the design product: used for isolating external radiation leakage and placing chest examination equipment. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view.

The invention relates to an insulator defect grading method based on external source irradiation and solar blind detection, which comprises the following steps: irradiating the surface of an insulator through a short wave external light source pulse, carrying out solar blind ultraviolet photon detection in a discharge active period after irradiation, and grading defects through an ultraviolet photon number measurement result. Therefore, traditional passive discharge detection is converted into active controllable detection.

New techniques for remote administration of medicine and medical devices using an external guidance and activation system are provided. In some embodiments, medicine(s) and / or medical device(s) is / are energized to a predetermined threshold energy level by externally applied radiation, and then driven into the treatment target. The design of such device(s) (e.g., injectable machine(s)) may include sub-device(s), e.g., medical payload-carrying reservoir(s), injector(s) and abrasive tool(s), which may be activated magnetically and / or by such radiation. In some aspects, such sub-device(s) include actuable housing(s) and / or other sub-tool(s), delivering drugs to specific locations commanded by a control system or a user. In other aspects, a medicine and / or device is provided with multiple dipoles, each oriented differently in three-dimensional space, allowing a guidance control system, remote from the medicine or device, to drive the movement and three-dimensional orientation of the medical agent or particle according to a three-dimensional path.

The invention relates to a thermal image capture system comprising: - a housing (110) defining a first opening; - a window (120) configured to at least partially cover the first opening; and - a capture device (130) positioned inside the housing and comprising a sensor (131) and an outer casing (132), wherein the outer casing accommodates the sensor and defines a second opening. The window, the first opening, and the second opening are positioned so as to allow external radiation through to the sensor. According to the invention, the thermal image capture system comprises a thermal interface (140) positioned so as to be in contact with the window and in contact with the capture device, wherein the thermal interface defines a third opening configured to allow the external radiation through to the sensor and to define, together with the window and the capture device, a sealed space containing a gas layer.

This invention discloses a puncture device and puncture system, including a puncture needle mechanism, a linearly movable moving mechanism, and a clamping mechanism for supporting the puncture needle mechanism. The moving mechanism includes a base, a sliding component, and a puncture driving component. The sliding component is slidably disposed on the base. The puncture driving component includes a shielding box for shielding external radiation and a puncture driving member. The shielding box is connected to the base, and the puncture driving member is built into the shielding box and connected to the sliding component, used to drive the sliding component to move linearly relative to the base. The clamping mechanism includes a first clamping component and a clamping driving component. The first clamping component is disposed on the sliding component, and the clamping driving component is built into the shielding box and connected to the first clamping component, used to drive the first clamping component to clamp or release the puncture needle mechanism. This invention eliminates the need for manual operation of the puncture needle for puncture.

The present disclosure relates to an automatable measuring device 100 applicable to any electromagnetic radiation source 200, in particular a vehicle headlight during a headlight test, as well as a system and a method which make it possible to reconstruct the four-dimensional electromagnetic radiation field of the radiation source 200 by consecutively capturing restricted light beams of the radiation source 200 to be analyzed, and thus to provide an efficient, cost-effective and extremely precise measuring mechanism for determining any radiation pattern deviations.

Apparatuses, systems and methods are disclosed for reducing interference between an active illumination device and external radiation sources, for example, other active illumination devices operating within the vicinity. A disclosed system includes one or more active illumination devices, each configured to emit an illumination signal and also to receive a returned portion of its respective illumination signal with at least one sensor. At least one of the active illumination devices is capable of detecting interference caused by an external source, for example, an illumination signal emitted from another active illumination device. As a result of detecting the interference, the receiving active illumination device changes the timing of its subsequent illumination signals and sensor operation. By detecting collisions between illumination signals and consequently altering the timing of it operation, the active illumination device may reduce interference in congested environments where multiple active illumination devices are operating within range of each other.

The invention relates to a radioactive gas extraction device with an external irradiation shielding function and a manufacturing and using method thereof. The device comprises a shell (1), a gas guide joint nut (2), a gas guide tube (3), a gas outlet joint (4), a gas outlet joint nut (5), a heating layer (6) and an external shielding layer (7), a radioactive gas to-be-extracted product is arranged in the shell (1), the gas guide connector nut (2) is communicated with the interior of the shell (1) through the gas guide pipe (3), the gas outlet connector nut (5) is communicated with the interior of the shell (1) through the gas outlet connector (4), and a heating layer (6) and an outer shielding layer (7) are sequentially arranged on the outer side of the shell (1). Compared with the prior art, the external radiation shielding function of the device is expected to achieve the effects of a traditional extraction hot chamber and an extraction furnace, and meanwhile, conditions can be created for continuous extraction of radioactive gas.

A thermal imaging capture system is proposed comprising: - a housing (110) defining a first aperture, - a window (120) configured to at least partially cover the first aperture, and - a capture device (130) positioned inside the housing and comprising a sensor (131) and an outer casing (132), the outer casing housing the sensor and defining a second aperture. The window, the first aperture, and the second aperture are positioned to allow external radiation to pass to the sensor. According to the invention, the thermal imaging capture system includes a thermal interface (140) positioned to be in contact with the window and with the capture device, said thermal interface defining a third aperture configured to allow said external radiation to pass to the sensor and to define, with the window and the capture device, a sealed space containing a gas layer.Figure for the abridged version: Fig. 1.

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 invention relates to a high-protection low-gravity-sense external irradiation protective garment which comprises an exoskeleton module and a protective garment module, when the protective garment is worn, the exoskeleton module is arranged on the inner side of the protective garment module, the exoskeleton module comprises a shoulder supporting part, a length adjusting part and a weight transferring part, and the weight transferring part is arranged on the shoulder supporting part by adjusting the length adjusting part of the exoskeleton module. Therefore, each joint position of the exoskeleton module corresponds to the joint position of the human body, and meanwhile, a preset height gap is kept between the shoulder supporting piece of the exoskeleton module and the shoulder of the person, so that the shoulder supporting piece of the exoskeleton module is prevented from being in direct contact with the shoulder of the human body; the exoskeleton module directly supports the protective clothing module through the shoulder supporting piece and carries out load transfer through the weight transfer component. The lead equivalent of the external irradiation protective clothing can be effectively improved, the ray protection effect can be greatly improved, the protection requirement of personnel in high-dose-rate places is met, meanwhile, the body load of shielding materials of the protective clothing on wearers is relieved, and the working efficiency is guaranteed.

The application provides an off-site radiation dose evaluation method and device based on nuclide migration combined simulation. The method comprises the following steps: acquiring working condition data and meteorological data of a nuclear power plant; identifying a target release working condition to which a nuclear accident belongs based on the working condition data and a working condition judgment condition; determining a key radioactive nuclide based on the target release working condition; and obtaining total irradiation dose of the key radioactive nuclide through an air-borne radioactive nuclide migration post-dose model, a water body radioactive nuclide external irradiation dose model and a soil deposition external irradiation dose model based on the working condition data, the meteorological data and environmental data of an emergency plan area corresponding to the nuclear power plant, so as to solve the technical problems in the prior art.

The application discloses a shaft current and radiation emission integrated test method and system for an electric drive system, and belongs to the technical field of testing. Through real road working conditions, the method and system realize the synchronous collection of multiple physical quantities of the electric drive system, and combine a high-fidelity digital twin model to perform dynamic correction and simulation analysis, thereby solving the problems of misalignment of data, missing correlation between internal shaft current and external radiation field, and incapability of quantifying the contribution of the shaft current in the traditional test. Therefore, the specific influence of the shaft current in the total radiation emission of the electric drive system can be accurately identified, a quantitative basis is provided for the diagnosis and optimization of electromagnetic compatibility problems, and the efficiency and accuracy of the EMC test and rectification of the electric drive system of the new energy vehicle are improved.

The invention is suitable for the technical field of nuclear detection and embedded systems, and provides an embedded fission chamber assembly and a method for monitoring delayed neutrons thereof.The embedded fission chamber assembly comprises an outer cylinder, the outer cylinder serves as a shell structure of the assembly, a fission chamber body is arranged in the outer cylinder and fixedly installed in the outer cylinder, and the fission chamber body is arranged in the outer cylinder; and the fission chamber main body forms a basic framework of the detection core chamber. The fission chamber main body is internally provided with a gas filling chamber, and the gas filling chamber is used for filling working gas; a collecting electrode and a high-voltage electrode penetrating through the head and the tail are assembled on the collecting electrode in the gas filling chamber, the high-voltage electrode serves as an electric field applying end, and the collecting electrode serves as a signal output end; the outer wall of the collecting electrode and the inner wall of the high-voltage electrode are plated with high-concentration uranium 235 layers; the uranium plating layer serves as a fission material coating and directly participates in nuclear fission reaction caused by neutrons, a large number of fission fragments are generated, and ionization signals are remarkably enhanced. The design of the uranium plating layer can reduce the covering effect of the gamma-ray background on the neutron signal and improve the signal-to-noise ratio of the signal. Double electromagnetic shielding is achieved through the staggered design of the inner shielding layer and the outer shielding layer, external radiation interference and electromagnetic noise are restrained, and the signal distortion rate is reduced.

The invention belongs to the technical field of gas curing, and discloses a gas curing method based on a high-brightness broadband light source, which comprises the steps of carrier gas treatment, solid gas light source construction, solid gas light path construction, solid gas treatment, quality detection and the like. Compared with an existing external irradiation technology, the method adopts a mode that pulses enter a nonlinear optical fiber, a high-brightness broadband light source is generated by utilizing a nonlinear effect, the light source has excellent light beam quality, wide spectrum and high brightness, almost all defects of the optical fiber have corresponding wavelength energy to directly reach a fiber core to improve the performance of the optical fiber, and the optical fiber performance is improved. Gas molecules are more stably left in the material, the carrier gas curing efficiency is improved, defects are reduced, and the service life of the optical fiber is prolonged.

The invention provides a multi-sensor distributed signal detection system based on a reconfigurable intelligent surface, which belongs to the field of wireless communication and comprises a plurality of sensor nodes, a fusion center and at least one external radiation source. After each sensor node independently completes target detection, a public radio frequency signal emitted by the same external radiation source is directly used as an information carrier, the phase and direction of a reflected signal are regulated and controlled in real time through the reconfigurable intelligent surface module, and modulation and transmission of information are naturally completed in a wireless channel. According to the architecture, the node structure is greatly simplified, and the hardware cost is remarkably reduced. The fusion center only needs to execute matched filtering based on known signal waveforms and constant false alarm rate threshold judgment on the received superposed signals to complete global decision, a complex signal fusion algorithm and a mass data processing link in a traditional distributed detection system are omitted, and millisecond-level processing delay is shortened to microsecond-level processing delay. And the real-time performance of the system is obviously improved.

Described are methods including cell wall-associated melanin extraction and extracting melanin from microbes producing extracellular vesicles comprising melanin. Further described are composition comprising melanin, melanin coated articles and methods of coating an article. Uses of melanin in methods of heat generation and microwave radiation protection are also described.

The utility model discloses an irradiation-resistant camera, which comprises an irradiation-resistant lower shell and an irradiation-resistant upper shell, a camera is arranged in the lower shell, an irradiation-resistant light-transmitting part is arranged on the upper shell, a reflecting lens is arranged in the upper shell, and light penetrating through the light-transmitting part to enter the upper shell can enter the camera through the reflection of the reflecting lens. According to the utility model, the camera is arranged in the radiation-proof lower shell, external light can only pass through the light-transmitting part and enter the camera through the reflecting lens, and external radiation can be shielded by the radiation-proof upper shell and the light-transmitting part, so that the radiation entering the camera is reduced, and the radiation-proof capability of the camera is improved.

The invention discloses a construction method and application of an acute radioactive olfactory disorder animal model, a linear accelerator is adopted to perform single dose gradient external irradiation on the head and neck of a mouse, and the model can stably simulate dose-related acute radioactive olfactory disorder and has the advantages of high survival rate, low cost, simplicity and convenience in operation and good repeatability. And a foundation is laid for related researches on an acute radioolfaction disorder generation mechanism and prevention and treatment of head and neck malignant tumor radiotherapy.

The application discloses a passive radar target positioning method and system based on external radiation sources, and relates to the technical field of radar positioning. The method comprises the following steps: screening external radiation source signals of a target monitoring area, and arranging a distributed receiving antenna array based on the signals; real-time receiving signals and transmitting the signals to a quality assessment unit; the quality assessment unit adaptively screens the signals, and outputs standard radiation source signals with radiation source type identification; characteristic parameters of the standard signals are extracted, a multivariate signal feature set is obtained, and multi-band signal fusion and target positioning analysis are carried out based on the feature set, so as to generate target position information. The application solves the technical problems of complex signal processing, insufficient positioning accuracy and limited dynamic monitoring capability of existing passive radar technology in a complex electromagnetic environment, achieves the technical effect of improving the positioning accuracy and dynamic monitoring capability of passive radar in a complex environment through multi-band signal fusion and adaptive signal processing.