17 results about "Particle transport" patented technology

This invention discloses a method for constructing a magnetron sputtering system, relating to the field of vacuum coating equipment design technology. The method includes: S1, parametric modeling to obtain the spatial potential distribution and working gas ionization characteristic distribution within the cavity, calculating the argon ion trajectory to determine the sputtering area on the target surface, and calculating the secondary electron trajectory for damage assessment; S2, calculating target particle transport and static film thickness distribution based on the sputtering area; S3, calculating the dynamic film thickness distribution and coating uniformity of the carrier plate based on the movement mode of the transport mechanism, and obtaining the coating efficiency based on deposition time and average film thickness; S4, comparing the coating efficiency, coating uniformity, and secondary electron damage assessment results with preset design indicators, iteratively optimizing until the indicators are met, and outputting the optimized design parameters of the magnetron sputtering system. This method solves the modeling and calculation convergence problem under strong coupling conditions of multi-physics fields, significantly reducing the debugging cost and structural redundancy after equipment manufacturing.

A system (20) for detecting anomalies of a transmission assembly (8) of an aircraft (1). The aircraft (1) comprises a lubrication system (10), which comprises a tank (11) containing a lubricating fluid, a nozzle (12) configured to supply the lubricating fluid to the transmission assembly (8) and a fluid line (13), which fluidly connects the tank (11) to the nozzle (12). The detection system (20) comprises a first device (22), which detects a first quantity (n) associated with particles transported by the lubricating fluid along the fluid line (13), a second device (23), which detects a second quantity (ai) associated with vibrations of the transmission assembly (8) and an electronic control unit (24). The electronic control unit (24) verifies whether one between the first quantity (n) and the second quantity (ai) satisfies a first control criterion, whether the other between the first quantity (n) and the second quantity (ai) satisfies a second control criterion when the first control criterion is not satisfied and determines the presence of a possible anomaly of the transmission assembly (8) and / or provides for corrective actions when neither control criteria are satisfied.

This invention discloses an X-ray shielding design method, system, device, and storage medium, relating to the field of radiation protection technology. The method includes the following steps: modeling multiple X-ray sources based on their actual locations and geometric structures using radiation particle transport software to obtain a computational model; determining the geometric structure of the shield to be designed based on the computational model; obtaining the material and dimensions of the shield to be designed based on a comparison of the simulated dose value of the target area when unshielded with a set dose limit; combining the geometric structure, material, and dimensions of the shield to be designed to obtain a shield model; integrating the shield model into the computational model to obtain a shielding computational model; and iteratively optimizing the shield model using the shielding computational model under the constraint of a set dose limit for the target area. This invention overcomes the shortcomings of traditional methods in handling the combined effects of multiple sources and spatial constraints, and is particularly suitable for shielding design in compact spaces.

The present invention relates to a waste treatment chamber (100) configured to operate in any one of a loading mode, a treatment mode, and an unloading mode, further configured to provide an inside environment of the treatment chamber (100) in the treatment mode for particle disinfection of medical waste using ozone, the treatment chamber comprising an inlet (110) configured to receive particles of medical waste in the loading mode, and configured to provide a gas-tight seal between the inside environment and an outside environment of the treatment chamber (100) in the treatment mode and the unloading mode, an outlet (120) configured to remove particles of medical waste from the treatment chamber (100) in the unloading mode, and configured to provide a gas-tight seal between the inside environment and the outside environment of the treatment chamber (100) in the loading mode and the treatment mode, a particle transport arrangement (130) configured to agitate particles of medical waste in the loading mode and the treatment mode, and further configured to move particles of medical waste to the outlet (120) for removal in the unloading mode, one or more sensors (S1, S2) configured to measure a characteristic of the sealed environment inside the treatment chamber (100), the treatment chamber fluidically coupled to or comprising a generator (G) configured to generate ozone and to maintain a target concentration level of ozone of the inside environment of the treatment chamber (100).

This invention discloses a pellet transport device, comprising a pellet lifting mechanism and a transverse pellet transport mechanism located at the upper and lower ends of the pellet lifting mechanism; the transverse pellet transport mechanism includes: a movable guide rail; a transport vehicle movable along the movable guide rail; a transverse drive assembly operably connected to the transport vehicle to drive the transport vehicle to move along the movable guide rail; a pellet tank connected to the transport vehicle, the upper end of the pellet tank having a feed inlet and a feed locking mechanism operably opening or closing the feed inlet, and the lower end of the pellet tank having a discharge outlet and a discharge locking mechanism operably opening or closing the discharge outlet; and an opening / closing assembly operably connected to the feed locking mechanism or the discharge locking mechanism to open or close the feed locking mechanism or the discharge locking mechanism. The pellet transport device provided by this invention eliminates the need to rotate the pellet tank when transferring pellets from the lower storage tank to the pellet tank or transferring pellets from the pellet tank to the upper storage tank.

The invention provides a particle discharging device and method for a Tokamak divertor area. The device comprises an adsorbent pump unit arranged in a divertor area and a gas channel structure communicated with the divertor area, and is used for capturing and discharging neutral particles generated by interaction of plasma and divertor components. The adsorbent pump unit is made of a non-evaporation type adsorbent material, has high adsorption capacity on hydrogen and isotopes thereof, can keep stable structure and working performance under the condition of high temperature, and is suitable for a high-heat-load and high-particle-flux operating environment in a divertor area. The in-situ air exhaust of the neutral particles is realized in the divertor area, so that the transport path of the particles is shortened, and the response speed and efficiency of particle discharge are improved. Meanwhile, the particle discharging device has large air extraction capacity and effective extraction speed, is suitable for tritium-related application scenes and operating environments with neutron irradiation, and has good engineering application prospects.

The application discloses a particle transport control method in a micro-nano fluid system, comprising the following steps: dividing a calculation domain of the micro-nano fluid system into multiple sub-domains, including an atomic domain, a continuous domain and a common region where the two coexist; defining a boundary condition of the common region, transmitting physical quantity information in the atomic domain to the continuous domain by defining a constraint condition on the common region, and transmitting fluid velocity and pressure information in the continuous domain back to the atomic domain; adopting an iterative solution strategy to update the physical quantity information of the atomic domain and the continuous domain; and applying an external field factor to verify the particle transport control performance in the micro-nano fluid system based on the multi-scale coupling calculation method. The application solves the technical problems of low particle cross-domain transport precision, large dynamic flow field prediction deviation and low simulation efficiency in the existing micro-nano fluid system.

An electrostatic separation apparatus and method are provided for isolating glandular trichomes from trichome-bearing plant biomass such as cannabis, hemp, or hops. The system may include a vertically oriented particle transport assembly configured to convey a sample through a linear free-fall pathway, a separation chamber with opposing electrode assemblies generating a uniform electrostatic field, and discharge electrodes positioned below the chamber to neutralize residual charge. Airflow regulation may be achieved through laminar diffuser plates and periodic vibration of critical components, including the hopper and diffuser, to prevent clogging and maintain uniform flow. The hopper may further include a circular discharge spout and rounded internal fillets to prevent bridging and ensure consistent powder recirculation. The apparatus achieves high-purity trichome separation through controlled field exposure, aerodynamic stabilization, and charge-neutralized particle discharge, enabling continuous, high-throughput operation with improved yield, reduced maintenance, and enhanced reproducibility across successive processing cycles.

This invention discloses a method for assessing the critical safety of a fuel transport container in a drop accident. First, the fuel transport container is geometrically modeled and meshed with an unstructured mesh. Then, a drop accident simulation is performed on this mesh model using explicit dynamic analysis software. After the simulation, the position and size information of the shell elements generated by deformation are extracted, and a corresponding solid element unstructured mesh model is rebuilt based on this information. This model is then meshed and integrated. Finally, a Monte Carlo particle transport simulation is performed to calculate the criticality, obtaining the effective multiplication factor. According to the "Regulations for the Safe Transport of Radioactive Materials," the effective multiplication factor is converted into a critical safety index, thus completing the safety assessment. This invention effectively solves the geometric compatibility problem in nuclear force coupling calculations by converting shell elements generated in the mechanical simulation that are unrecognizable by the Monte Carlo program into solid elements, reducing the simulation burden while ensuring computational accuracy.

This invention discloses a method and apparatus for assessing the impact of spacecraft plumes on in-situ atmospheric detection payloads in orbit. The method includes: Step S1, constructing a continuous flow field model within the spacecraft's thruster nozzle and a designated near-field region at the exit, and solving for macroscopic flow field data; Step S2, reconstructing cross-basin heterogeneous data based on the macroscopic flow field data, converting it into microscopic particle source data; Step S3, establishing a particle transport model adapted to the spacecraft's geometry and tracking rarefied flow particles; Step S4, calculating the quantitative assessment results of payload contamination effects based on the tracking results of rarefied flow particles. This invention significantly improves the physical realism and computational accuracy of vacuum plume diffusion simulation, achieves low-distortion mapping of heterogeneous simulation data during cross-scale transmission, greatly improves the design iteration efficiency during spacecraft development, and constructs a parameterized end-to-end process.

This invention discloses an acoustic levitation microscopy testing device, belonging to the field of intelligent detection technology, which solves the problems of low efficiency and inability to achieve real-time continuous observation in manual slicing. The present invention features a quantitative jet gun connected to a support at one end via a telescopic robotic arm, with a reed mounted on the jet gun; a jet head is horizontally positioned below the jet gun; a reflector is located in the middle of the support, and a sound wave generator is positioned directly below the reflector; the nozzle of the quantitative jet gun and the outlet of the jet head are located between the reflector and the sound wave generator; several cold needles are mounted on the support via the telescopic robotic arm; the cold needles deliver the collected sample into a reagent kit, which is then transferred to an image analysis system via a sample preparation device for image analysis of the sample. This invention utilizes acoustic levitation for stable particle transport, featuring dynamic real-time continuous observation. By employing a cold needle sample processing system for layer-by-layer analysis of activated sludge, it can achieve the profiling of activated sludge particles.

The application provides a device and method for improving Monte Carlo particle transport simulation of probability density distribution sampling, specifically: introducing particle transport data of an environment to be analyzed; determining a probability density distribution type of the particle transport data, and pre-processing the particle transport data according to the probability density distribution type; optimizing a Monte Carlo particle transport algorithm based on a weight-based alias sampling algorithm, and calculating the pre-processed particle transport data through the optimized Monte Carlo particle transport algorithm to obtain a radiation field calculation result of the environment. The probability density distribution type of different particle transport data can be pre-processed, the Monte Carlo particle transport algorithm can be optimized based on the weight-based alias sampling algorithm, the time complexity of the probability density distribution sampling can be greatly reduced, the efficiency of the Monte Carlo particle transport calculation can be improved, and the radiation field calculation result of the environment to be analyzed can be quickly obtained.

The present disclosure provides a reactor scattering matrix correction method and device, electronic equipment and storage medium, which relates to the technical field of nuclear reactors, and through the adoption of particle transport simulation to obtain the statistical quantity of mean square displacement of neutrons in the reactor medium and to obtain the average scattering angle cosine by inversion to determine the initial first-order scattering matrix, at the same time, the equivalent relationship between the infinite medium model and the target finite geometry is established and the geometric correction factor is calibrated, and in the group constant calculation of the target finite geometry, the correction factor is applied to correct the average scattering angle cosine obtained based on the flux proportionality assumption, and then the corrected first-order scattering matrix is generated, so that the problem that the anisotropic scattering is systematically underestimated due to the dependence on the flux proportionality assumption in the prior art, and the mean square displacement derivation of the infinite medium model cannot adapt to the finite geometric structure such as the reflection layer or super-component, thereby causing the large calculation error of the effective multiplication factor and the significant neutron flux deviation in the reflection layer region, can be solved.

This invention provides a shape simulation method that enables high-speed execution of shape simulations. [Solution] The method comprises a Voxel generation step of generating a Voxel in which the number of non-reactive simulated solid particles, the number of reactive simulated solid particles, and the type of bonding are set as parameters of a Voxel variable corresponding to a plurality of simulated solid particles; a gas particle setting step of setting initial conditions for gas particles; a particle transport calculation step of identifying the arrival position of gas particles; a surface reaction determination step of identifying the Voxel present at the arrival position of the gas particles and determining the surface reaction between the Voxel and the gas particles; a surface reaction calculation step of calculating the number of reactive particles and the bonding state in the parameters of the Voxel variable based on the change in bonding state for the determined surface reaction; and an update step of updating the parameters of the Voxel variable according to the calculation results.

Title: Tire Particle Collection Device The invention relates to a particle collection device (1) that can be attached to a vehicle, configured to collect particles transported in an airflow (F), comprising a main body (10) including an electrodynamic plate (1411) configured to attract particles by electrostatic attraction, a secondary body (20) removable from the main body and configured to collect particles after the electrostatic attraction has ceased, characterized in that the electrodynamic plate has a main surface (1411a) positioned substantially in a plane parallel to the flow and in that the secondary body is positioned in a parallel plane below the electrodynamic plate so as to collect particles by gravity,the secondary body comprising an inclined surface (232) intended to direct the particles towards a receiving zone (233) configured to collect the particles. Figure for the abbreviation: Fig. 1.

The application discloses a method and system for measuring and feeding back fuel deposition based on transient analysis, which comprises the following steps: continuously capturing the transient evolution of the plasma density profile at a time resolution meeting the requirements of transient analysis before and after the fuel pulse trigger, and accurately synchronizing the working timing of the fuel trigger, data acquisition and signal analysis; calculating the density profile change amount within the selected transient analysis time window, and obtaining the deposition position and the total deposition particle number; calculating the real fuel efficiency according to the total deposition particle number and the calibrated injected particle number, comparing the real fuel efficiency and the deposition position with the target value, and generating a control instruction to adjust the parameters of the subsequent fuel pulse in real time. The application can quickly capture the initial deposition state of the fuel in a very short time after fueling, that is, before the wall recirculation and particle transport effect significantly interfere with the measurement results, so as to realize accurate evaluation of the real fuel efficiency and synchronous acquisition of the spatial information of the deposition position.

The application provides a method for calculating respiratory airflow and particle transport based on a dynamic coupling full airway model. The method comprises: constructing a five-branch full airway three-dimensional model comprising an upper airway segment, a triple bifurcation unit (TBU) segment, and an alveolar segment; establishing a dynamic motion model of the glottis, trachea, and alveolar region to realize the geometric change of the airway structure in the respiratory cycle; adopting a segmented independent simulation and step-by-step boundary condition transmission strategy to complete the transient airflow simulation in each level of the airway; and introducing a particle tracking mechanism to realize the simulation of the transport, deposition, and exhalation process of inhaled particles from the oral cavity to the alveoli. The above method combines real anatomical structure, dynamic physiological motion, and efficient calculation strategy to improve the accuracy and calculation efficiency of airflow and particle transport simulation, and is suitable for scenarios such as inhaled drug delivery, air pollution exposure assessment, and respiratory system disease modeling.