101 results about "Radiation effect" patented technology

The invention belongs to the technical field of radiation effect and radiation hardening of semiconductor devices and integrated circuits, and particularly relates to a single event effect laser simulation system based on Bessel beam shaping. A Bessel beam shaping and focusing module based on an axon lens is introduced and composed of the axon lens and two lenses, namely a single lens and a focusing lens, a Gaussian beam of an incident beam is shaped into a quasi-Bessel beam, and the quasi-Bessel beam is utilized to irradiate a semiconductor device to be detected. The axial distribution of the light beam is kept unchanged in a range of hundreds of microns, and the focusing breaking through the diffraction limit is realized in the radial distribution, so that the effect closer to the heavy ion charge deposition track is generated. The technology can solve the problem that a multilayer structure device, a thick sensitive region device and a wide forbidden band device are difficult to test through traditional laser simulation, and has important practical value for promoting laser simulation of the single event effect.

The application discloses a kind of spaceborne storage module packaging method, spaceborne storage module and satellite, the method includes obtaining the model of packaging circuit module;Thermal simulation experiment is carried out based on the model of packaging circuit module, and heat flux density distribution information is obtained;Target cooling area is determined based on heat flux density distribution information;Packaging circuit module is installed on substrate;First shielding layer is manufactured using metal material of first density;The model of second shielding layer is obtained;Micro-channel heat dissipation area is determined based on target cooling area;Second shielding layer is manufactured based on the model of second shielding layer using metal material of second density;Third shielding layer formed by coating material is prepared on the inner surface of second shielding layer, to obtain composite shielding shell;Composite shielding shell is fixedly installed on substrate through insulating adhesive layer and contains packaging circuit module, to obtain spaceborne storage module.The application makes that composite shielding shell has anti-radiation effect and heat conduction effect simultaneously, which greatly improves the heat conduction efficiency.

The embodiment of the utility model relates to the technical field of antennas, and particularly discloses a UWB module, which comprises a metal shell and an antenna unit. The metal shell is provided with an inner cavity; the antenna unit is arranged in the inner cavity, the antenna unit is coupled with the metal shell so that the antenna unit can radiate outwards through the metal shell, the antenna unit is provided with a defect gap, and the defect gap is parallel to the inner wall of the opposite part of the metal shell in the direction pointing to the edge from the center of the antenna unit. Through the above mode, the embodiment of the utility model can improve the outward radiation effect when the antenna unit is in the metal shell.

The present application relates to the technical field of building thermal test, and provides an experimental device for coupling sky cold and hot radiation effects and a control method thereof.The device comprises a first radiation cooling component, a solar radiation component and an air cooling component, the first radiation cooling component is obliquely arranged on both sides and connected at the top to form a detection space, the air outlet of the air duct of the air cooling component is located at the bottom of the components on both sides, the air return port is opposite to the top, and the solar radiation component is fixed in the air duct away from the detection space on one side.The present application cooperatively arranges the obliquely combined first radiation cooling component, the air cooling component with air supply at the bottom and air return at the top, and the solar radiation component arranged in the air duct in isolation, constructs a detection environment balanced in cold and hot radiation, realizes coupling simulation of solar radiation heat effect and sky radiation cold effect, can more accurately test the performance of energy production type building envelope components, and solves the technical problem that the existing building thermal test device has low test precision and cannot meet the performance evaluation of energy production type building envelope components.

The invention provides a radiation effect integration method, system and device of an SPICE model and a medium, and relates to the technical field of circuit simulation, and the method comprises the steps: extracting a model parameter affected by radiation from an original SPICE model corresponding to a target device, and taking the model parameter as a radiation sensitive parameter; acquiring electrical characteristic data of the target device under different radiation conditions, extracting numerical values of radiation sensitive parameters under each radiation condition based on the electrical characteristic data, and obtaining associated data between the different radiation conditions and the numerical values of the radiation sensitive parameters; based on the associated data, establishing a mapping relationship between the radiation condition and the numerical value of the radiation sensitive parameter by using a neural network model; and substituting the mapping relation into the original SPICE model to update the numerical value of the radiation sensitive parameter so as to obtain an enhanced SPICE model containing the radiation effect. According to the invention, the behavior of each device in a real circuit can be simulated more accurately in circuit simulation through the enhanced SPICE model.

The invention discloses a triple modular redundancy method based on redundancy backup and FPGA (Field Programmable Gate Array) control. Three groups of data lines are expanded on the FPGA to be connected with the Norflash, and three groups of data are read at the same time to perform triple modular redundancy calculation. The FPGA controls the four Norflash to write data at the same time during writing, and the FPGA chip selects the Norflash to output according to a logic sequence during reading, and determines whether to perform triple modular redundancy operation by judging the state of the Norflash. And sending the wrong sector number and the wrong Norflash number to the SOC chip through a serial port and a corresponding protocol, then sending the wrong sector number and the wrong Norflash number to the ground through the SOC chip, and after an instruction from the ground is received, carrying out error correction on the Norflash according to the instruction. According to the method, the influence of the radiation effect on the low-orbit satellite in the space is overcome, the cost is reduced to a certain extent, the speed and the efficiency are ensured, and meanwhile, the problems that under the condition that only three Norflash pieces exist, one Norflash piece breaks down, so that resources of the other two Norflash pieces are wasted, and data reading based on triple modular redundancy cannot be achieved are solved in a redundant backup mode.

The utility model relates to the field of kitchen appliances, in particular to an air fryer which comprises a machine body and a fryer body, a containing cavity for installing the fryer body is formed in the machine body, a heating piece and a centrifugal fan are arranged in the containing cavity and located above the center of the fryer body, and the bottom wall of the fryer body protrudes to form a plurality of food material containing areas. Food materials are placed on the top walls of the food material placing areas, and the heights of the multiple food material placing areas are gradually decreased in the direction away from the center of the pot body. In the direction pointing to the center of the pot body, the height of the food material placing area closer to the center of the pot body is higher, the distance between food materials on the food material placing area and the heating piece is closer, the radiation effect on the food materials is stronger, and therefore the problem that the temperature of the center area of the supporting face of an existing pot body is lower than that of the periphery can be solved; therefore, the food materials are uniformly and consistently colored in each food material placing area, the coloring effect is better, and the user experience is improved.

The present application relates to neutron dosimetry method, specifically provide a kind of for boron neutron capture therapy fast neutron dosimetry method, by using the paired ionization chamber test system with different liquid environment, one kind of liquid environment has obvious absorption to thermal neutron, then the radiation source under the same power is measured, to obtain more accurate fast neutron dose and the rest two kinds of mixed radiation dose, to solve the problem of inaccurate neutron dose test of different kinds in the prior art in the application process of mixed radiation field, more accurate mixed radiation quantity value can be obtained, so that the different types of neutron dose in mixed radiation field are grasped, so as to improve the radiation effect in the application scene of mixed radiation field.

This invention discloses a radiation effect simulation method for SRAM-type FPGAs. It combines device-level and circuit-level modeling simulation to simulate the combined effects of total dose and single-event effects on the FPGA, analyzing the impact of various radiation effects on the FPGA's operating state. This method solves the problems of limited accelerator resources, difficulty in adjusting irradiated particle energy, and high economic costs. It helps to understand the changes in internal micro-parameters of the device and reveal the damage mechanism, enabling the evaluation of the device's radiation damage sensitivity. It provides technical support for FPGA radiation resistance evaluation and hardening design, and is economical and convenient. It can be used to evaluate the radiation resistance of devices, contributing to improved device reliability in aerospace engineering applications.

The invention provides a GEO electric propulsion satellite orbital transfer process solar cell radiation effect rapid evaluation method, which comprises the following steps that: firstly, a solar cell radiation damage space distribution database is constructed through space radiation effect analysis software, and the database comprises daily average equivalent 1MeV electron flux distribution data under different orbit heights, inclination angles and cover glass thicknesses; generating satellite space track data according to an electric propulsion orbital transfer strategy; counting accumulated operation time of the satellite in each height and dip angle interval according to a preset interval; and finally, multiplying and accumulating the daily average equivalent 1MeV electron flux corresponding to each interval by the accumulated running time to quickly obtain the accumulated equivalent 1MeV electron flux in the whole orbital transfer process. Therefore, the problem of long calculation time consumption of a traditional method is solved, and rapid evaluation support can be provided for radiation mitigation optimization design of the orbital transfer strategy.

The invention relates to the technical field of antennas, and discloses an antenna structure, a generation method thereof, a radio frequency device and equipment. The antenna structure comprises a dielectric substrate which comprises a first surface and a second surface opposite to the first surface; the first surface comprises ground; the second surface comprises a radiation patch; the feeder line is used for feeding power to the radiation patch; wherein the radiation patch comprises at least one grounding area, and the radiation patch adjusts the electromagnetic field distribution on the surface of the radiation patch through the grounding area. According to the antenna, through arrangement of the grounding area and adjustment of electromagnetic field distribution on the surface of the radiation patch, adjustment of a directional diagram is achieved, the radiation effect of the antenna is improved, the antenna structure is simple, design and deployment implementation difficulty is low, and miniaturization of the antenna size is facilitated.

The invention provides an anti-radiation transverse integrated power semiconductor device. The anti-radiation transverse integrated power semiconductor device comprises a P-type substrate, an N-type epitaxial region, a first N-type doped region, a second N-type doped region, a third N-type doped region, a fourth N-type doped region, a first P-type doped region and a second P-type doped region, the first dielectric layer is arranged on the surface of an active region of the device, the second dielectric layer is arranged on the surface of a field region of the device, and the active region is of a closed structure and covers and exceeds the first N-type doped region; and the polycrystal gate is arranged on the surface of the first dielectric layer. The drift region of the transverse device is of a longitudinal structure, the surface of the drift region is not provided with a thick field oxide layer, and a large amount of charges generated by total dose radiation are avoided, so that the influence of the total dose radiation effect on the performance of the device is greatly reduced, and the device has high total dose radiation resistance.

[Problem] To provide protective clothing with superior convenience from the viewpoint of the safety of the wearer. [Solution] By providing a splitting part 20 capable of irreversibly splitting a body part 10 separately from an opening / closing means 15 used for undressing and dressing by the wearer, the body part 10 can be quickly opened as needed without using the opening / closing means 15, and convenience of work for taking off the protective clothing from the wearer in an emergency or the like is improved. The splitting part 20 includes a thread 21 attached to the body part, a slit 22 provided to the body part, and a fragile part. In addition, by discharging air by means of an exhaust part 40 while forcibly feeding air into the body part 10 by means of an intake part 30 provided to the body part 10, heat accumulated inside the protective clothing can be immediately discharged. Further, by providing a guide part 50, a greater heat radiation effect can be achieved by improving the circulation of air inside the body part 10.

The invention relates to an antenna, base station equipment and electronic equipment, and the antenna comprises a phase inverter and a ground branch knot. Each of the phase inverter and the ground branch knot is provided with at least one bending part, the bending part is provided with a shunt branch knot, and the shunt branch knot is communicated to form two sides of the bending part so as to provide a current shunt. Therefore, the current path is increased by additionally arranging the shunt branches, and branches with different lengths are provided for high frequency and low frequency, so that the anti-phase effect and the radiation effect under a wide frequency band are improved, and the gain level is improved.

The application discloses a self-adaptive fish scale modified rice hull ash radiation refrigeration polymer coating as well as a preparation method and application thereof, and belongs to the technical field of coating compositions. The preparation method is high in efficiency and convenient, the raw materials are widely sourced, and the production cost is low, so that high-value utilization of solid waste can be realized. In the obtained fish scale modified rice hull ash radiation refrigeration polymer coating, the raw material fish scale has a fluorescent effect, can stably absorb ultraviolet rays during the day, and the infrared radiation of silicon dioxide in the rice hull ash and the excitation radiation of titanium dioxide in the polymer coating can be combined, so that the radiation effect of the coating under multi-scene illumination is realized, and the refrigeration effect is achieved. The application has a good use prospect in reducing heat input.

The utility model provides a DEMOS device and an integrated circuit. The DEMOS device comprises a substrate, a well region, a gate structure, a source-drain injection region and a drift region, wherein the gate structure is positioned on one side, far away from the substrate, of the well region; and the source-drain injection region and the drift region are positioned in the well region. The anti-radiation reinforcing buffer region is located in the well region and surrounds the source region in the source-drain injection region, the isolation region is located on the surface of the substrate, and the orthographic projection of the isolation region on the surface of the substrate surrounds the orthographic projection of the anti-radiation reinforcing buffer region on the surface of the substrate and surrounds the orthographic projection of the drain region on the surface of the substrate. Therefore, the source region can be isolated from the isolation region, the change of the main body structure of the original DEMOS device is relatively small, and on the premise of ensuring the length of the channel between the source region and the drain region, even if the silicon surface layer under the well region and the whole isolation region is inverted due to the total dose irradiation effect, due to the existence of the anti-radiation reinforced buffer region, the anti-radiation effect of the DEMOS device is improved. And an electric leakage channel cannot be formed between the source region and the drain region, so that the anti-radiation capability is improved.

The utility model discloses an anti-radiation plate with coal ash, and relates to the technical field of anti-radiation plates. The anti-radiation plate comprises an anti-radiation plate body and an anti-radiation attaching block, the anti-radiation plate body is composed of a decoration panel layer, a coal ash base material layer and an anti-radiation layer, and the decoration panel layer, the coal ash base material layer and the anti-radiation layer are sequentially attached from outside to inside. The surface of the anti-radiation layer is provided with a butt joint assembly used for preventing radiation at the edge attaching position of the anti-radiation plate body, the surface of the anti-radiation attaching block is provided with a connecting assembly, and the inner wall of the connecting assembly is provided with a first rubber strip. The upper and lower joints of the adjacent anti-radiation plate bodies can be in butt joint through the butt joint assemblies, by improving the plate structure and the connection mode, installation gaps are effectively eliminated, the overall anti-radiation performance is improved, meanwhile, the improved structure and the anti-radiation plate are made of the same material, and the anti-radiation effect is good. And the problem that the filling material is easy to age and fall off after being used for a long time is avoided.

This invention discloses an underwater target reflectance inversion method based on an underwater transmission model, comprising: acquiring the original digital values ​​of the underwater target collected by a hyperspectral camera; combining the built-in radiometric calibration parameters of the hyperspectral camera; converting the original digital values ​​into radiance based on the sensor pre-calibration response characteristics; physically modeling the water absorption effect, scattering effect, and path radiation effect during underwater light propagation to determine the linear mapping relationship between radiance and target reflectance; constructing a training radiative transmission model using a non-negative linear regression model; using a calibrated target with known reflectance as a sample to train the radiative transmission model between the original digital values ​​and the target reflectance, and solving for the mapping parameters between the two; and based on the original digital values ​​and mapping parameters of the underwater target to be reconstructed, using the trained radiative transmission model to invert and obtain the true reflectance of the target, thus completing the spectral reconstruction.

The application discloses a miniaturized high-isolation receiving array applied to GNSS and belongs to the technical field of antennas. The miniaturized high-isolation receiving array comprises an antenna unit and a cross-shaped electron bandgap structure, and the antenna unit is arranged in a right angle of the structure. The antenna unit is surrounded by three dielectric substrates to form a closed cuboid air cavity, a second substrate is provided with a reflecting ground, and a third substrate is covered with a bent gable-shaped metal side wall, so that left-handed or right-handed circular polarization can be realized; and a first substrate is provided with an open ring-shaped dipole arm. The cross-shaped electron bandgap structure comprises a mushroom-shaped structure, a cross-shaped metal reflecting ground and a cross-shaped dielectric block, and a top metal patch of the mushroom-shaped structure is connected with the metal reflecting ground through a metal column. The miniaturized high-isolation receiving array adopts high dielectric constant substrates to realize miniaturization, the metal side wall is connected with the reflecting ground to improve the radiation effect, the size of the dipole arm and the opening are adjusted to form circular polarization radiation, and the units are sequentially rotated to form an array and the mushroom-shaped structure is loaded to realize high isolation.

The invention relates to a modeling method of a storage unit total dose and neutron single particle synergistic effect model, and belongs to the technical field of radiation effects. The modeling method of the memory cell total dose and neutron single particle synergistic effect model comprises the following steps: establishing a transistor total dose effect TCAD model; fixed trapped charges induced by a transistor total dose effect are introduced into a charged particle charge collection model in an additional electric field form, and a transistor total dose and charged particle single particle synergistic effect TCAD model is established; substituting into a storage unit circuit topological structure, and establishing a storage unit total dose and charged particle single particle synergistic effect model; and establishing a mapping relationship between neutrons and charged particles in the semiconductor material, and establishing a memory cell total dose and neutron single particle synergistic effect model. According to the method, prediction of the total dosage of the SRAM chip and the single-particle synergistic effect of neutrons or charged particles can be realized, and a weak link of the single-particle upset effect of the SRAM chip caused by the synergistic effect can be traced and positioned.

The application provides a single event upset influence quantification index determination method based on program periodic updating, which comprises the following steps: for the instruction Cache in the periodic updating central processing unit (CPU), quantitatively characterizing the influence of single event upset (SEU) on the electronic system as a single event upset (SEU) sensitive area, calculating the error number of the instruction Cache output when the program remains unchanged, constructing a modified physical model of the error number of the instruction Cache output after the program periodic updating step, obtaining the error number of the instruction Cache output after the program periodic updating step, and determining the quantification index of the influence of single event upset (SEU) after the program periodic updating step. The application can realize the quantitative evaluation of the single event upset (SEU) influence alleviating effect of the program periodic updating step, effectively support the quantitative evaluation of the influence of radiation effects on electronic products in the engineering implementation process, effectively support the quantitative evaluation of the reliability of the electronic system, and the quantitative evaluation result is beneficial to the development of airworthiness certification activities.

Provision of a magnetic coil unit in which the heat radiation effect can be improved. By displacing the axis (A1) of a winding (41) in the X-direction from the central section of a cross plate (51), a temperature difference is created between the space inside an outer housing (5) and the surroundings of a coil unit (4) on both sides of the X-direction that center the axis (A1). This temperature difference generates an airflow in the X-direction. Since the Y-direction dimension of the coil unit (4) is 64 to 87% of the distance between a pair of connecting plates (53, 54), the airflow between the coil unit (4) and the connecting plates (53, 54) can pass efficiently, thus improving heat dissipation.

This invention discloses a planar sound source with a liquid-filled pipeline, solving the problems of large size, complex operation, poor adaptability, and insufficient low-frequency sound radiation effect in existing structures. The technical solution includes a sound source housing and a piston disposed within the housing. A pressure-regulating cavity is formed between the inner surface of the piston and the housing. A piston rod passes through the housing and connects to a piezoelectric actuator. The pressure-regulating cavity is connected to the measurement environment via a microchannel on the housing, and a shut-off valve is provided on the microchannel. This invention features a simple structure, small size, extremely simple operation, automatic balancing of fluid pressure on both sides of the piston, good low-frequency sound radiation effect, and effectively improved sound radiation efficiency of the piston.

The present application relates to the technical field of building thermal test, solve the technical problem of low accuracy of the test of the building envelope performance due to the lack of sky background radiation cold effect in the prior art, provide a kind of coupling sky cold and hot radiation effect's building envelope performance test method and system, the method comprises: according to weather database, establish equivalent sky effective temperature control model;According to equivalent sky effective temperature control model, test environment parameter control module is obtained by testing environment parameter;According to testing environment parameter, the real-time test data of the building envelope test piece under the control of testing environment parameter is obtained by testing data acquisition module;Real-time test data is analyzed by testing data analysis module, and test result is obtained.The present application introduces controllable equivalent sky effective temperature model, effectively solves the problem of lack of sky background radiation cold effect in the prior art, and the deviation of test result and actual building service environment is large.

The application discloses a latch and a flip-flop resisting single event upset in a digital circuit, and relates to the technical field of digital integrated circuit design, to solve the problem that the prior art cannot resist single event upset of multiple nodes in the latch structure of a digital circuit. The latch comprises at least a basic latch, a transmission gate and a detection circuit which are connected with each other. The latch uses a detection signal of the detection circuit to judge the level upset state of the basic latch, and generates a control signal for controlling the output of the latch based on the level upset state of the basic latch. Further, a plurality of the above latch structures can be used to form a flip-flop. Thus, the latch and the flip-flop can be restored to the correct level after being subjected to multi-node single event upset, and the resistance of the latch and the flip-flop to single event radiation effects is improved.

The present application discloses a slow-wave plate structure, comprising a waveguide radiation body, wherein the front end face of the waveguide radiation body is provided with a serpentine slow-wave groove, and one end of the serpentine slow-wave groove is provided with a feed signal end; a serpentine channel is formed in the serpentine slow-wave groove, the serpentine channel is connected to the feed signal end, the serpentine channel comprises a plurality of straight waveguide sections and connecting waveguide sections, a gap portion is present between two adjacent straight waveguide sections, and the two adjacent straight waveguide sections are connected by means of one connecting waveguide section; and the plurality of straight waveguide sections are provided with waveguide radiation gaps at intervals, or the waveguide radiation gaps are respectively provided in the plurality of straight waveguide sections. The present application has the advantages of simple structure, low cost, good radiation effect, wide application range, etc.

The invention relates to the technical field of polypeptide extraction, and discloses a method for extracting crocodile nail peptide with an anti-radiation effect, which comprises the following steps: degreasing and crushing crocodile nails to obtain fine powder, and performing solid-phase kneading on the fine powder and an enzymatic extraction auxiliary composition under an anhydrous condition; adding water, homogenizing, and treating by a high-voltage pulse electric field to obtain a flexible precursor; sequentially adding keratinase and alkaline protease to carry out constant pH relay hydrolysis in a nitrogen-filled micro-positive pressure environment; cooling, adjusting the pH to an isoelectric point, performing coagulation, separating supernate, performing gradient elution through macroporous adsorption resin, and performing vacuum concentration to remove alcohol; finally, the concentrated solution is screened through 3000 Da and 500 Da ultrafiltration membrane bags in sequence, trapped fluid is collected, freeze drying is conducted, and the product is obtained. According to the preparation method disclosed by the invention, the dissolution rate and the purity of the crocodile methyl peptide with the anti-radiation effect are effectively improved by combining solid-phase kneading, a high-voltage electric field with double-enzyme hydrolysis and physical screening, and inactivation and loss of active ingredients are avoided.

The utility model provides a heating assembly and a cooking device, and belongs to the technical field of cooking utensiles.The heating assembly comprises a furnace end and a radiation part arranged above the furnace end, and the furnace end is used for heating the radiation part so that the radiation part can generate infrared heat radiation; the furnace end comprises a heating pipe and at least one fire blocking piece arranged on the outer wall of the heating pipe, and flame holes are formed in the peripheral side of the heating pipe and located below the fire blocking pieces. The fire blocking piece gradually inclines upwards relative to the horizontal plane from the direction opposite to the heating pipe, and a flame channel penetrating in the vertical direction is formed in the side, facing the heating pipe, of the fire blocking piece. The flow path of flames can be optimized through the fire blocking piece, the contact area of the flames and the radiation part is enlarged, the radiation part is heated more evenly, and the infrared heat radiation effect generated by the radiation part is improved.

The invention discloses a high-precision portable extensible integrated power supply system for testing the radiation effect of an SOC (System on Chip) device, and aims to improve the precision, portability and expandability of a power supply during the radiation effect test of the SOC device. A traditional power supply system has the problems of poor precision and portability balance, insufficient expandability and the like, and the test efficiency and the data reliability are influenced. The problem is effectively solved by designing a high-precision portable extensible integrated power supply system which comprises a power supply conversion unit, a main control unit, a power supply output channel and a man-machine interaction unit.

The invention discloses an improved laser radar aerosol particle size inversion method based on backscattering characteristics, and belongs to the technical field of atmospheric remote sensing detection. The method comprises the following steps: firstly, establishing a double-layer revolution ellipsoid model of which the aspect ratio represents morphological characteristics and the core-shell ratio represents coating structure characteristics for real dust-wrapped aerosol; then simulating the optical characteristics of the sand-dust-wrapped aerosol with the precision of 600 scattering directions by adopting a DDSCAT code, and simulating and calculating the optical characteristics of the core-shell spherical sand-dust-wrapped aerosol with a smaller calculation step length by utilizing a DDA method; then, carrying out extinction characteristic inversion based on the double-layer revolution ellipsoid and the core-shell sphere model to obtain an extinction equivalent particle size; and taking the extinction equivalent particle size as a constraint condition, and performing inversion to obtain a back scattering equivalent particle size. According to the method, the inversion precision of the backward scattering equivalent particle size of the dust aerosol wrapped under the laser radar framework is improved, and reliable data support is provided for dust aerosol radiation effect evaluation.