50 results about "Ionizing radiation" patented technology

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.

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.

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).

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 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.

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.

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.

Device (1) for detecting ionising radiation comprising: a first set (10) with a plurality of primary floating gate sensors (100) with a cumulative response proportional to a received ionising radiation; a second set (20) with a plurality of secondary floating gate sensors (200) with a cumulative response proportional to the received ionising radiation. The primary sensors (100) have a sensitivity to ionising radiation above a first threshold. The secondary sensors (100) have a sensitivity to ionising radiation above a second threshold lower than the first threshold, whereby the first set (10) is configured to detect ionising radiation in a first range and the second set (20) is configured to detect ionising radiation in a second range, and the first range is lower than the second range.

The object of the present invention is to provide a flooring material that is excellent in stain resistance and stain removal, as well as excellent in slip resistance. [Solution] A flooring material comprising a flooring material body including a resin layer and a surface protective layer on the flooring material body, wherein the surface protective layer includes a cured product of an ionizing radiation-curable resin composition, and the ionizing radiation-curable resin composition includes at least one selected from ionizing radiation-curable silicone-modified urethane (meth)acrylate resin and ionizing radiation-curable fluorine-modified urethane (meth)acrylate resin, and anti-slip particles.

The present invention provides: a decorative sheet having excellent scratch resistance; and a technology that makes it possible to design a decorative sheet with a high degree of flexibility in texture and external appearance. A decorative sheet 1 is provided with a raw fabric layer 2, a primer layer 4, and a surface protective layer 6 in this order, and has a plurality of air bubbles 5 between a surface of the surface protective layer 6 and the raw fabric layer 2. The surface protective layer 6 includes: a first gloss adjustment layer 61 that is provided on the primer layer 4 and that contains a cured product of a first ionizing radiation curable resin; and a second gloss adjustment layer 62 that partially coats the upper surface of the first gloss adjustment layer 61 and that contains a cured product of a second ionizing radiation curable resin. The surface of the second gloss adjustment layer 62 includes a plurality of protrusions, each of which has a ridge shape. A ratio B / A is greater than 1, where B represents the height of the upper surface of the first gloss adjustment layer 61 relative to the lower surface of the primer layer 4 at a position of the plurality of bubbles 5, and A represents the height of the upper surface of the first gloss adjustment layer 61 relative to the lower surface of the primer layer 4 at a position away from the plurality of bubbles 5.

The utility model belongs to the technical field of ionizing radiation detection, and particularly relates to a halide scintillation crystal detector for petroleum logging. The device comprises a shell and a reaction layer, the shell is a sealed shell, a scintillation crystal is packaged in the shell, and a light transmission device is coupled to a light emitting surface, corresponding to the scintillation crystal, of the shell; and the reaction layer is filled between the shell and the scintillation crystal and is used for absorbing water and oxygen. The utility model is used for solving the problem that the scintillation crystal is easy to deliquesce at high temperature. By filling the reaction layer in the shell for sealing and packaging the scintillation crystal, trace water and oxygen in a sealing system are removed by utilizing the reaction between the reaction layer and water and oxygen in the shell, so that the problem of deliquescence of the scintillation crystal caused by reaction between water and oxygen and the scintillation crystal is avoided.

The utility model discloses a support for ionizing radiation detection equipment, which relates to the technical field of auxiliary supports of detection equipment and comprises a stand column, a limiting sleeve is slidably sleeved outside the lower end of the stand column, stabilizing mechanisms are symmetrically arranged on the outer side of the lower end of the stand column, and an adjusting mechanism is arranged at the upper end of the stand column. A fixing table is arranged at the top end of the adjusting mechanism, and a mounting table is arranged on one side of the fixing table. The rotating lead screw drives the lifting rod in threaded connection to move up and down, so that the lifting rod drives the fixed table to move synchronously, and the use height of the support can be adjusted; meanwhile, the detection equipment is conveniently clamped on the mounting table through two groups of clamping plates which are gradually close to each other, so that the detection equipment is not easy to slip off during use, and a swing arm of the detection equipment swings by utilizing damping rotating shafts mounted in the fixed table and the mounting table, so that the detection angle of the detection equipment can be adjusted by utilizing the swing arm, and the detection result is more accurate.

This relates to a robotic arm combined with a positioning tool that repeatedly and reproducibly positions the body relative to an ionizing radiation therapy beam during treatment. [Solution] A radiotherapy treatment system is provided to assist in the treatment of a subject in an extracorporeal radiotherapy program comprising one or more extracorporeal radiotherapy treatment sessions, the system comprising a robotic arm 400 having a proximal end and an effector end, and a steering guide 300 having a proximal end and a distal end, the distal end having a rigid effector shaft configured to be inserted into a tube of the subject or to be attached to an inserter configured to be inserted into a tube of the subject, and a placement tool 200 configured to move and / or fix the tube for an extracorporeal radiotherapy treatment session in response to the movement of the robotic arm 400.

The application provides application of a small molecule compound YZL-51N in preparation of a SIRT7 selective inhibitor. The application finds that the small molecule compound YZL-51N can be used as a specific small molecule inhibitor of SIRT7. The application verifies that the compound YZL-51N can effectively inhibit SIRT7 deacetylase activity by using polypeptide deacetylation. The application also proves that YZL-51N has stronger interaction affinity with SIRT7 compared with other sirtuins family members by a BLI experiment method. The application verifies that the small molecule compound inserts into a pocket and interacts with hot spot amino acids by a molecular docking experiment. In a cell model, YZL-51N can also specifically inhibit SIRT7 and replenish the substrate. Under ionizing radiation stimulation, the compound can effectively inhibit a SIRT7-ATM cell signal pathway.

Provided is a decorative sheet having low gloss, i.e., excellent design properties, and having high durability, particularly, scratch resistance and stain resistance, and processability. The decorative sheet (1) according to the present embodiment includes a base material layer (2), and a surface protective layer (5) provided on one surface of the base material layer (2), the surface protective layer (5) having a ridge portion provided in a ridge shape on a surface thereof, and having a concave-convex shape, the concave-convex shape of the surface protective layer (5) having an RSm / Ra in a range of 10 or more and 300 or less, and a main material of the surface protective layer (5) being an ionizing radiation-curable resin, a main component of the ionizing radiation-curable resin being a 4-functional acrylic resin including a repeating structure, the repeating structure being any one of an oxirane structure, an oxetane structure, and an ε-caprolactone structure, and a repeating number of the repeating structure being 12 or more.

This invention discloses the application of citrus flavonoids (NOB) or SR1078 in the preparation of drugs to improve salivary gland function, particularly in improving the circadian rhythm of salivary glands damaged by ionizing radiation. Oral administration of a specific dose of NOB or SR1078 can significantly promote salivary gland function. Furthermore, it does not interact with other drugs with anti-inflammatory or regenerative functions. It can be administered as a single dose or multiple times consecutively; it can be administered after injury, and this flexible administration method does not affect the tumor radiotherapy process.

The invention relates to the technical field of emotion regulation, in particular to a method and system for regulating emotion and social behaviors based on terahertz radiation. According to the technical scheme, the method comprises the following steps: directionally irradiating a head target region of a mammal object with terahertz waves; according to the method, by establishing the clear corresponding relation between the specific terahertz frequency and the emotional behavior regulation effect, the long-standing core problems of parameter chaos and unpredictable effect in the field are solved; based on the characteristics of non-ionizing radiation, a safe novel intervention way capable of avoiding side effects of drugs is provided, and the effectiveness and biological safety of operation are ensured through a safety parameter window verified by experiments; the method provided by the invention can generate a stable and repeatable behavior regulation effect.

The invention discloses an ionization radiation field simulation calibration system based on artificial intelligence, and particularly relates to the field of simulation calibration, and the system comprises a multi-source radiation data collection 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 method comprises the following steps: acquiring original data of a radiation field, and performing abnormal value elimination, normalization and enhancement processing to generate a standardized data set; constructing a radiation field dynamic simulation model based on a deep learning model, and outputting a three-dimensional space dose distribution simulation result in real time; building a calibration parameter optimization model based on reinforcement learning, generating a calibration instruction, and driving an execution mechanism to perform real-time calibration; and constructing a multi-dimensional verification index system, intelligently verifying a calibration result by adopting a deep learning classification model based on an attention mechanism, dividing the calibration result into three levels of qualification, to-be-optimized and disqualification, starting an error traceability algorithm for a result which does not pass verification, and generating a correction suggestion.

This invention relates to an additive manufacturing system for powder starting materials, utilizing an electron beam gun as an irradiation device. The system includes an improved shielding against ionizing radiation (especially X-rays). By using the additive manufacturing system according to this invention, a compact and lightweight build-up area shielding is achieved.

An imaging system that includes an imaging detector, an object region and a scintillator stack having a first scintillator and a second scintillator positioned between the imaging detector and the object region along an imaging pathway. The first scintillator is positioned upstream the second scintillator along the imaging pathway and is configured to convert a first ionizing radiation into first photons comprising a first wavelength and the second scintillator is configured to convert a second ionizing radiation into second photons comprising a second wavelength and comprises a higher transmittance percentage at the second wavelength than the first scintillator. WO

The invention discloses an ionizing radiation acoustic signal acquisition method based on high-energy e-Flash radiotherapy, which comprises the following steps of: irradiating an object to be detected by adopting high-energy e-Flash rays, enabling the object to be detected to generate an ionization effect and generate an ionizing radiation acoustic signal, acquiring the ionizing radiation acoustic signal by using a transducer, amplifying and filtering the acquired signal, and transmitting the amplified and filtered signal to the high-energy e-Flash radiotherapy. And the signals are input into the STM32 chip for analog-to-digital conversion, and the converted signals are transferred and stored in an STM32 chip memory in a DMA mode, and then are further stored in an external memory card. And after the signal acquisition process is completed completely, performing subsequent frequency response inverse solution and Wiener filtering processing on the acquired signal to restore the original ionizing radiation sound signal, thereby providing basic support for subsequent space dose reconstruction work.

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. 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.

A kind of NMOS-based stepped nuclear radiation total dose indication and compensation circuit, comprising: bias circuit provides stepped bias voltage for NMOS tube gate;Stepped bias switching circuit receives NMOS transistor sensing signal, and switches bias voltage to NMOS transistor radiation sensing array circuit;Sensing array circuit is damaged by nuclear radiation source to itself NMOS transistor, and the influence of NMOS transistor threshold voltage to indication circuit board ionizing radiation total dose level;FPGA compensation control circuit receives the level change signal output from sensing array circuit, and the corresponding size of nuclear radiation total dose is output, and the compensation control signal of digital potentiometer is output, and the resistance of radiation damage electric signal output is compensated by modifying digital potentiometer.It is evaluated that the present circuit board is received by the threshold voltage radiation damage effect of NMOS transistor in nuclear radiation environment total dose of fixed point size, and the indication signal is provided for FPGA radiation compensation circuit, with the advantages of low power consumption, strong robustness etc..

The application relates to the technical field of simulation analog of electronic devices, and relates to a simulation method for ionization / displacement synergistic effect in an oxide layer of a bipolar transistor, which comprises the following steps: constructing an oxide layer model of the bipolar transistor; obtaining an ionization radiation effect defect model after the oxide layer model of the bipolar transistor interacts with high-energy photons to generate ionization radiation effect; obtaining a displacement radiation effect defect model after a charged particle interacts with the oxide layer model of the bipolar transistor to generate displacement radiation effect, and calculating a second defect parameter of the displacement radiation effect defect model by using SRIM software; inputting the first defect parameter and the second defect parameter into the ionization radiation effect defect model after the first defect parameter and the second defect parameter are associated, obtaining an ionization / displacement synergistic effect defect model, and obtaining a third defect parameter of the ionization / displacement synergistic effect defect model. The application avoids the problems that an irradiation source is difficult to accurately control energy in a ground test process, improves the accuracy of simulation, and reduces errors.

Device for monitoring the treatment of an object (4) comprising the device (1) - an optical unit (2) designed to direct ionizing radiation (3) onto the object (4); - a filter element (5) which can be arranged in a beam path of the ionizing radiation (3) in order to attenuate a portion of the ionizing radiation (3); - an imaging unit (6) configured to detect components of the ionizing radiation (3) passing through the object (4) in order to produce an image (8) of part of the object (4); - an eye-tracking system (26) designed to detect the eye movements of an observer (25); and a control unit (10) designed to control the position of the filter element (5) depending on the eye movement during a first operating mode; characterized by the fact that the control unit (10) is set up to - to identify a predefined eye movement sequence depending on the eye movement; - to switch from the first operating mode to a second operating mode once the eye-tracking sequence has been identified; and - during the second operating mode, to control the position of the filter element (5) depending on an image analysis of the image (8).

The invention concerns a beam collimator for electromagnetic radiation, especially of X-ray spectrum, and / or ionizing radiation comprising: a plurality of beam-absorbing body portions stacked on top of one another with respect to a beam direction, each comprising a plurality of slits and a plurality of walls; wherein the slits respectively extend through the body portion substantially along a thickness direction of the body portion extending from beam input to beam output, the slits and walls alternating along a height direction of the body portion; and wherein the slits and walls of at least one first body portion are arranged relative to slits and walls of at least one further second body portion such that, in height direction, walls of the first body portion are entirely within respectively adjacent slits of the second body portion. The invention also concerns a beam collimator with walls and / or slits tapered along a width direction of a body portion thereof.

The present disclosure presents systems and methods of tagging TRISO-fueled pebbles. One such method comprises acquiring an ionizing radiation image of a TRISO-fueled pebble; analyzing, using a machine learning algorithm, the acquired image of the TRISO-fueled pebble to identify a unique pattern of particle distributions that is visible in the acquired image of the TRISO-fueled pebble; and matching the unique pattern of particle distributions with a unique pattern of particle distributions previously stored in an image database for the TRISO-fueled pebble. Other systems and methods are also presented.