183 results about "Ionizing radiation" patented technology

The invention relates to an automatic calibration method and system for an ionizing radiation instrument, a storage medium and electronic equipment, and the method comprises the following steps: obtaining image information of the radiation instrument through an intelligent camera, carrying out the recognition based on the image information, and obtaining a tag number of the radiation instrument; performing image acquisition and image recognition on the radiation instrument in the verification process of the radiation instrument to obtain instrument data; analyzing and calculating the instrument data to obtain a data processing result; and generating an instrument calibration certificate and an original record based on the data processing result and the instrument data. The data of the radiation instrument can be automatically identified and grabbed, the original record and the instrument calibration certificate can be automatically generated, the data accuracy, the data consistency and the traceability are improved, meanwhile, human factors are reduced, human resources are saved, and the cost is greatly reduced.

The invention provides a method for removing refractory organic matters in wastewater, which comprises the following steps: adding periodate into the wastewater, and uniformly mixing to obtain a solution to be irradiated; the addition amount of the periodate is 1-4 mM; performing ionization irradiation treatment on the solution to be irradiated; wherein the irradiation absorbed dose of the ionization irradiation treatment is 0.2 to 3.0 kGy. According to the method, the degradation rate and mineralization rate of the ionization irradiation technology on refractory organic pollutants are improved; the irradiation absorbed dose required by degradation and mineralization of refractory organic pollutants is reduced, and the reaction time is short; degradation and mineralization of refractory pollutants can be realized at normal temperature and normal pressure, and the operation is simple and convenient; the catalyst has no selectivity for degradation-resistant organic pollutants, and is suitable for a relatively wide pH range; the method has a wide application prospect in the field of environmental protection.

Systems and methods for guiding radiation therapy including providing particle radiation to a region of interest of a subject and receiving volumetric ionizing radiation acoustic imaging (iRAI) data and ultrasound imaging data from the region of in response the particle radiation. Further, from the iRAI data and the ultrasound imaging, a position of the particle radiation in the region of interest is determined, that position being a treatment position of the particle radiation. Further, the systems and methods determine one or more parameters of the particle radiation for adjusting in response to the determination of the position.

The invention discloses a rapid large-scale calculation simulation method and system for gamma radiation dose in a dynamic environment and a storage medium, and belongs to the technical field of ionizing radiation protection. The method comprises the following steps: firstly, constructing a triangular mesh scene model containing a radioactive source and a shielding body, and discretizing the radioactive source into a local point kernel; global coordinates of the point kernel and the vertex of the triangle are calculated in parallel by using a GPU, and a maximum parallelization hierarchical surrounding structure MPBVH of the scene is constructed; ray tracing is executed in parallel on the GPU, and all intersection points of MPBVH calculation rays and the shielding body are traversed to determine the thickness and the material of each shielding layer; and finally, dose values of all counting grids are calculated in parallel by adopting a point kernel method. When a radioactive source or a shielding body in a scene is subjected to dynamic changes such as movement and rotation, geometric data can be quickly updated, and calculation can be executed again. According to the method, the speed of large-scale point kernel calculation is increased, the influence of the environmental complexity on large-scale calculation time consumption is small, and the method can be suitable for rapid large-scale calculation and dynamic updating of the radiation field in the complex dynamic environment.

The invention provides an irradiation system, devices, and methods. The irradiation system includes a shielded housing; at least one canister disposed within the shielded housing, the at least one canister containing a material for irradiation within an interior volume of the at least one canister; wherein the at least one canister has a body disposed between a first end cap disposed at a first end of the canister and a second end cap disposed at a second end of the canister opposed to the first end; an ionizing radiation source disposed within the shielded housing adapted for emitting an ionizing radiation having at least one selected incident irradiation field geometry directed generally at the body of the at least one canister; wherein at least one canister is disposed on a rotating mechanism for rotating the at least one canister about a central horizontal or longitudinal axis extending from an isocenter of the first end cap to an isocenter of the second end cap for increasing uniform distribution of radiation of the material contained within the canister.

The present disclosure is directed to a process, device, and system for recycling a composite material comprising a base material composited with a polymer material, which may can include a process comprising applying a non-ionizing radiation to the composite material and contacting the composite material with H2O until the polymer material is substantially removed from the base material to produce a recycled base material.

A low-absorption and high-emission thermal control coating resistant to high-dose ionizing radiation and its preparation method, which relates to the field of spacecraft thermal control coatings. The thermal control coating includes a bottom coating, a middle coating, and a top coating sequentially arranged on the surface of a substrate; the bottom coating includes barium sulfate, cerium oxide, and a binder; the middle coating includes hollow glass microspheres, a binder, and an inorganic dispersant; the top coating includes indium tin oxide and a binder. It greatly increases the scattering ability of different spectral energies of sunlight and the tolerance to vacuum ionizing radiation, enabling it to meet the design requirements of high precision and long life of modern new spacecraft.

The invention provides a metal atom catalyst based on ionization irradiation in-situ synthesis and a synthesis method, and the synthesis method comprises the following synthesis steps: adding a catalyst carrier and a metal salt into an ethanol solution, stirring at 50-70 DEG C for 1-4 h, and then filtering out a solid; carrying out vacuum drying treatment on the solid, then mixing the solid with a proper amount of isopropanol and deionized water in a centrifugal tube, discharging air in the centrifugal tube, and carrying out irradiation treatment with the irradiation dose rate of 0.4-1.0 kGy / h and the irradiation time of 6-25 h; and carrying out suction filtration on the mixed system subjected to irradiation treatment, and carrying out washing and vacuum drying treatment on the obtained solid to finally obtain the metal atom catalyst. The synthesis process provided by the invention is simple in process flow and low in cost, the dose required by irradiation is greatly reduced, in the prepared metal atom catalyst, the dispersion degree and the loading capacity of metal monoatoms are high, and an economical and effective method capable of realizing large-scale production is provided for synthesis of the carbon-loaded multi-metal atom catalyst.

The invention discloses application of aronia melanocarpa polysaccharide in preparation of a product for preventing and treating radiation liver injury, and belongs to the technical field of biological medicine preparation. The invention provides application of polysaccharide in preparation of products for preventing and treating liver injury, and particularly relates to novel application of aronia melanocarpa polysaccharide in preparation of drugs, health care products, food or feed for preventing and treating liver injury caused by ionizing radiation. The polysaccharide can relieve liver injury by increasing superoxide dismutase of liver tissues and reducing the content of glutamic-pyruvic transaminase and the like, has superiority when being used for medicines, health care products and the like for preventing and treating liver injury, and has no toxic or side effect.

Disclosed herein are methods and apparatus for acquiring positron emission (or PET) data in the presence of ionizing radiation causing PET detector afterglow. In one variation, the method includes adjusting a coincidence trigger threshold of a PET detector during a treatment session. In one variation, the method includes adjusting a gain factor used in positron emission data acquisition (e.g., a gain factor used to multiply and / or shift an output(s) of a PET detector(s)) during a treatment session. In some variations, a method for acquiring positron emission data during a radiation treatment session includes suspending communication between a PET detector and a signal processor of a controller for a predetermined period of time after a radiation pulse is emitted by a linear accelerator.

An x-ray-based reservoir evaluation tool for the measurement of the shale density anticipated at shale-creep barrier within a cased borehole is disclosed, wherein the tool includes an internal length comprising a sonde section, wherein the sonde section further includes an x-ray source; a plurality of radiation measuring detectors; sonde-dependent electronics; and a plurality of tool logic electronics and PSUs. A method of using an x-ray-based shale-seal evaluation tool for measuring the shale density anticipated at shale-creep barrier within a cased borehole is also disclosed, the method including: using x-rays to illuminate the formation surrounding the cased borehole; using detectors to directly measure the density of the formation; using detectors to directly measure the effects on the measurement from tool stand-off or production liner attenuation; and compensating for the production liner and liner-annular region when computing the saturated formation density within the production interval.

The invention relates to an illumination device for illuminating a space exposed to ionising radiation, the device comprising: a power supply circuit having an input for receiving alternating current from a mains electricity grid and an output suitable for delivering a direct current in response to receiving the alternating current, the power supply circuit comprising a diode bridge, and an illumination circuit (50) connected to the output of the power supply circuit, the illumination circuit comprising: a plurality of light-emitting diodes (51) connected in series, a plurality of Zener diodes (52), each connected in parallel with one or more light-emitting diodes of the plurality of light-emitting diodes and at least one resistor (53) connected in series with the plurality of light-emitting diodes, wherein a cumulative nominal supply voltage of the plurality of light-emitting diodes connected in series is adapted to a nominal voltage of the mains electricity grid.

A device for concentrating ionizing radiation fluence is disclosed having a coupling structure linking the external radiotherapy device with linear accelerator to an external structure, whose central axis is hollow with an input window through which electrons enter attaching to the rotation device; a rotation system linking the coupling structure with a coupling flange rotating an inner structure; a deflection system in the inner structure, wherein the deflection system has first and second magnetic deflection devices; a system for controlling the focal point, which is in the electron deflection system, having an electronic control system controlling a set of motors that produce coordinated movements of the second magnetic deflection device, a correction element and a collimator, which change the position of the focal point; and at least two laser diodes on the edge of the collimator pointing towards the focal point determining the position of the electron beam generated.

A solid-state device having a substrate that receives an ionizing radiation, logic circuits, integrity circuits, and a collection circuit. The logic circuits are operational to perform logic functions. The logic circuits are located in an area on the substrate, and are individually susceptible to a possible corruption by the ionizing radiation. Each integrity cell is initialized to a predetermined state. The integrity cells are located in the area on the substrate, arranged in a pattern neighboring the logic circuits, and individually susceptible to disrupting the predetermined state in response to the ionizing radiation. The collection circuit is located on the substrate. The collection circuit is operational to read the plurality of integrity cells, and assert a report signal that identifies the possible corruption in a subset of the logic circuits due to the ionizing radiation in response to reading an incorrect state in a neighboring one of the integrity cells.

The present invention provides: a technique which enables design with a high degree of freedom in touch or appearance of a decorative sheet; and a decorative sheet which has excellent scratch resistance. Disclosed is a decorative sheet 1 which comprises a master layer 2, a primer layer 4, and a surface protection layer 6, and has a plurality of air bubbles 5 between the surface of the surface protection layer 6 and the master layer 2. The surface protection layer 6 comprises a first gloss adjustment layer 61 that is provided on the primer layer 4 and contains a cured product of a first ionizing radiation curable resin, and a second gloss adjustment layer 62 that partially covers the upper surface of the first gloss adjustment layer 61 and contains a cured product of a second ionizing radiation curable resin. The upper surface of the first gloss adjustment layer 61 includes a plurality of protrusions each having a ridge shape, and the ratio B / A of the height B of the upper surface of the first gloss adjustment layer 61 based on the lower surface of the primer layer 4 at the positions of the plurality of air bubbles 5 to the height A of the upper surface of the first gloss adjustment layer 61 based on the lower surface of the primer layer 4 at a position separated from the plurality of air bubbles 5 is greater than 1.

Provided is a decorative sheet having excellent scratch resistance and excellent adhesion between gloss adjustment layers. A decorative sheet (1) is provided with a raw material layer (2) and a surface protection layer, and the surface protection layer comprises: a first gloss adjustment layer (5) which is provided on the raw material layer (2) and contains, as a resin cured product, a cured product of a first ionizing radiation-curable resin that is a first mixture of an acrylic acid ester and a methacrylic acid ester, and a second gloss adjustment layer (6) which is provided on the first gloss adjustment layer (5) and contains, as the resin cured product, a cured product of a second ionizing radiation-curable resin that is a second mixture of an acrylic acid ester and a methacrylic acid ester; and a second gloss adjustment layer (6) which partially covers the upper surface of the first gloss adjustment layer (5), contains a cured product of a second ionizing radiation-curable resin as a resin cured product, and has a higher specular gloss GS (60 DEG) than the first gloss adjustment layer (5).

A radiation hardened active power transformer includes an active compensator on a primary side of a transformer. The transformer steps up an input voltage to an output voltage. The active compensator controls a reactive power of the output voltage. The active compensator includes wide band-gap transistors which radiation harden the active compensator to resist ionizing radiation.

The application discloses an ionizing radiation field simulation calibration system based on artificial intelligence and particularly relates to the field of simulation calibration, comprising a multi-source radiation data acquisition module, a data preprocessing module, an AI simulation calculation module, a real-time radiation field calibration execution module, and a multi-dimensional calibration result AI verification module; the application generates a standardized data set by collecting original radiation field data and performing outlier rejection, normalization and enhancement processing; a radiation field dynamic simulation model is constructed based on a deep learning model, and a three-dimensional space dose distribution simulation result is output in real time; a calibration parameter optimization model is constructed based on reinforcement learning, a calibration instruction is generated, and an execution mechanism is driven to perform real-time calibration; a multi-dimensional verification index system is constructed, a deep learning classification model based on an attention mechanism is used to intelligently verify the calibration result, and the calibration result is divided into three grades, namely, qualified, to-be-optimized and unqualified; for the result that does not pass the verification, an error traceability algorithm is started, and a correction suggestion is generated.

The invention discloses a flaw detector teaching aid, comprising a shell, a containing cavity is arranged in the shell, a placing plate for dividing the containing cavity into an upper cavity and a lower cavity is arranged in the containing cavity, a test block is placed on the placing plate, an imaging plate is arranged in the lower cavity, a ring-shaped connecting piece is arranged below the imaging plate, an upper bell mouth is arranged at the head of the ring-shaped connecting piece, a lower bell mouth is arranged at the tail, the top surface of the upper bell mouth is connected with the lower end surface of the imaging plate, a camera is arranged at the opening of the lower bell mouth, an adjusting device for adjusting the movement of a light source to illuminate the test block is arranged in the upper cavity, the adjusting device comprises a longitudinal adjusting mechanism and a lateral adjusting mechanism, the light source is an LED lamp, the light source is an LED lamp, the invention uses an LED lamp light source to replace a high-voltage package in the prior art, and utilizes the visible light of the LED lamp light source to simulate ray flaw detection, the LED lamp light source can greatly reduce ionizing radiation and does not harm human health.

Described herein are physically cross-linked, closed-cell, continuous, multilayer foam structures comprising: a foam layer comprising polypropylene, polyethylene, or a combination of polypropylene and polyethylene, and a polyamide cover layer. The multilayer foam structure can be obtained by coextruding a multilayer structure comprising at least one foam composition layer and at least one cover composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.

The application belongs to the cross field of radiation safety monitoring and Internet of Things technology, and particularly relates to a low-power consumption Mesh distributed radiation intelligent monitoring system based on a double GM tube adaptive fusion algorithm. In order to solve the defects of the wireless radiation monitoring system, such as limited communication distance, limited node quantity, poor network reliability and the like, the application adopts a low-power consumption Bluetooth Mesh network (BLE Mesh) architecture, integrates a double-channel Geiger-Muller (GM) tube radiation detector, a sliding window CPM algorithm, an adaptive range selection and weighted fusion algorithm, an intelligent multi-level alarm mechanism and a remote dynamic configuration function, and realizes large-range, multi-node, self-organizing network, low-power consumption distributed ionizing radiation real-time monitoring and intelligent early warning.

The application discloses a novel single-event-hardened flip-flop circuit, which comprises a master-stage latch and a slave-stage latch connected in parallel between a first transmission channel and a second transmission channel, wherein the first input and output ends of the master-stage latch and the slave-stage latch are connected with the first transmission channel, and the second input and output ends of the master-stage latch and the slave-stage latch are connected with the second transmission channel; a delay element is arranged in the feedback loop of the master-stage latch and / or the slave-stage latch; the delay element is used for keeping the level of the second node of the feedback loop unchanged when the first node of the feedback loop is affected by single particle incidence during the data holding stage of the latch in which the delay element is arranged, and the level of the first node is recovered after the ionizing radiation is finished. The master-stage latch and the slave-stage latch are connected in parallel, and the delay element is arranged in the latch, so that the flip-flop circuit with the advantages of low production cost, small occupied area, high data transmission speed and good single-event-upset resistance is obtained.

A decorative sheet includes a primary film layer and a surface protection layer, the surface protection layer has a gloss level of 15 or less, the surface protection layer includes on a surface thereof a ridged portion protruding in a ridged pattern and thus has an irregular shape formed on the surface, the surface protection layer contains an ionizing radiation-curable resin as a main material, the ionizing radiation-curable resin contains as a main component a trifunctional acrylic resin having a repeating structure, the repeating structure is any of an ethylene oxide, propylene oxide, or &ε-caprolactone structure, the number of repetitions of the repeating structure is 3 or more, and vinyl groups contained in the ionizing radiation-curable resin is 20% or less relative to carbonyl groups contained in the ionizing radiation-curable resin.

Systems and methods are provided for optically annealing an optical fiber disposed in a cryogenic environment subjected to ionizing radiation, such as a fusion energy source. The technique includes optically annealing the optical fiber with a first light having a first peak wavelength and a second light having a second peak wavelength different from the first peak wavelength. The first and second peak wavelengths can be selected to optically anneal defects associated with temporary radiation induced attenuation (RIA) and permanent RIA.

A method for identifying a moving radiation source by a radiation portal monitoring system is described. The radiation portal monitoring system includes a radiation portal monitor with a plurality of radiation detectors configured to detect ionizing radiation of the radiation source and to generate a detection signal responsive to detection of the ionizing radiation, and at least one processor executing the steps of providing an identification machine learning model; receiving labelled static identification training data generated by radiation detection of a plurality of known static radiation sources; introducing to the static identification training data modifications representing detection signal alterations caused by radiation source movement through the radiation portal monitor to obtain pseudo-dynamic identification training data; training the identification machine learning model using the pseudo-dynamic identification training data; and identifying the moving radiation source from the detection signal using the trained identification machine learning model.

A completely de-energizable defibrillator is provided, allowing the electrical components of the defibrillator to be electrically unbiased while the defibrillator is not in use. The energizing of the defibrillator can be controlled through a power switch interfaced to a relay, with the microcontroller of the AED being able to de-energize the circuitry in case of unintended activation. Additionally, the microcontroller unit of the AED includes features to prevent computational errors due to external influences, electromagnetic interference, radio frequency interference, ionizing radiation, high energy particles, cosmic radiation, and / or solar radiation, or a combination thereof, including one or more pairs of lockstep processors, error detection code, and features that prevent tampering with the microcontroller.

The application provides a semiconductor machine working signal collection method and a semiconductor machine. The semiconductor machine comprises a vacuum reaction cavity used for plasma etching of a wafer. The method comprises: sleeving an electromagnetic shielding ring on a cable of a signal collection module outside the reaction cavity, the cable being used for transmitting working signals of the reaction cavity collected by the signal collection module; generating plasma in the reaction cavity by a source radio frequency power supply; and collecting working signals of the reaction cavity by the signal collection module during a process. The application has the advantage that ionizing radiation of the source radio frequency power supply can be effectively prevented from interfering with the signal collection module, and the accuracy and stability of signal collection are greatly improved.

Provided is a resist composition in which a cross-linker that reacts in response to ionizing radiation or non-ionizing radiation having a wavelength of 300 nm or less is compounded.

An easy-to-construct nuclear reactor shielding facility with robust shielding against ionizing radiation is provided. This nuclear reactor shielding facility is a nuclear reactor shielding facility for shielding a nuclear reactor installed on an installation surface by enclosing the nuclear reactor, and includes: a base structure that is disposed around an outer surface of the nuclear reactor except for the installation surface, and encloses an entire surface of the nuclear reactor except for the installation surface; and a shielding structure that is disposed on an entire surface of the base structure and internal of which is filled with water.

Provided herein are methods of making polyalkylene carbonate compositions. The methods provided herein may comprise one or more of the following steps: (1) a polymerization step wherein an alkylene oxide is contacted with carbon dioxide, optionally in the presence of a catalyst, thereby forming a polyalkylene carbonate; (2) a dissolution step wherein the polyalkylene carbonate is dissolved in an organic solvent, thereby forming a polyalkylene carbonate solution; (3) a heat treatment step wherein a polyalkylene carbonate composition is heated, thereby forming a heat-treated poyalkylene carbonate composition; and (4) an irradiation step wherein a composition comprising polyalkylene carbonate is exposed to ionizing radiation, thereby providing an irradiated polyalkylene carbonate composition