11 results about "Particle interaction" patented technology

The application discloses a kind of high-speed moving particles and underwater cavity interaction test device in the field of fluid test device, comprising: cavity generation unit, including the cylinder filled with water;Ejection module, is located above cylinder, for making particle high-speed movement pass through the cavity generated by cavity generation unit, and the speed information of particle is realized acquisition;Laser imaging unit is located at the circumferential periphery of cylinder;Control unit, and cavity generation unit, laser imaging unit and ejection module are electrically connected;And a kind of test method;The beneficial effects of the application are: thus by setting cavity generation unit, ejection module, laser imaging unit and control unit, control unit is according to the existence time of cavity, the speed of particle, the accurate pulse control of laser imaging unit to the position of particle, the accurate capture of cavity and high-speed particle interaction image data is realized, and test result is more conducive to the research of abrasion problem.

Continuous processing equipment is suitable for use in the preparation of elastomeric compositions from end-of-life tire crumb or other vulcanized rubber starting materials. A reactor includes an outer barrel, a first shaft and a second shaft, and one or more piezoelectric transducer-driven acoustic horns arranged along the outer barrel and penetrating the outer barrel through a series of vibration-isolated ports which traverse a jacket of the outer barrel.

The invention provides a particle simulation method and device, electronic equipment, a storage medium and a program product, and the method comprises the steps: determining a particle distance between a first particle and a second particle according to the first position information of the first particle and the second position information of the second particle, the first particle and the second particle are any two of a plurality of simulation particles to be analyzed in a simulation task; according to a preset truncation radius interval and the particle distance, determining an interaction weight between the first particle and the second particle; determining an acting force between the first particle and the second particle based on the interaction weight; and executing the simulation task according to the acting force among the plurality of simulation particles to obtain a simulation result of the simulation task. According to the embodiment of the invention, the accuracy of acting force between particles can be ensured, and the accuracy of a particle simulation task is improved.

The invention relates to an intraoperative probe for guiding an excision tool, comprising a detection head, said detection head comprising a plurality of optical fibers each coupled to a photodetector characterized in that said optical fibers are transparent and scintillator-free, the proximal end of each of said transparent fibers is optically coupled with a single continuous scintillator optically coupled to a light guide, capable of capturing beta and / or gamma particles and emitting light in response to this interaction, the distal end of each of said transparent fibers is coupled to a photodetector, and in that said intraoperative probe is associated with a signal processing system, configured to analyze the signals delivered by said photodetectors.comprising: a means for temporal coincidence analysis of said signals delivered by said photodetectors to discriminate real events from thermal noise; a processing means enabling the reconstruction of the interaction position of particles in said continuous scintillator from the distribution of light transmitted by said optical fibers. Figure of the abstract: 1,

The invention provides a whole-process simulation method and system for tunnel seepage and water and mud bursting, and the method comprises the steps: building a numerical model containing a tunnel and a fault, and building a solid particle and fluid particle system through meshless particles; a random fracture network is constructed and mapped to solid particles, and attributes are assigned according to fracture filling conditions; calculating particle interaction, introducing a seepage-stress coupling model into a fracture region, and dynamically updating seepage characteristics to simulate implicit seepage; judging damage and fracture of solid particles by using a preset criterion, and representing a cracked block by discrete element particles if the condition is met; calculating contact force between discrete element particles and contact force between discrete element particles and undamaged particles, and simulating movement of fractured rocks; bidirectional fluid-solid coupling is established, and whole-process simulation of seepage inoculation, rock mass fracture and water and mud bursting is achieved through time integration. According to the invention, the strong coupling process of rock mass fracture and large deformation fluid migration is seamlessly simulated through DEM-SPH coupling.

This invention relates to a method for determining particle stress during the collapse process of an underwater two-component particle mass, including the calculation of the collision pressure, friction pressure, collision shear stress, and friction shear stress of the i-th particle component, in order to obtain the i-th particle component. i The pressure and shear stress of each particle component are used to determine the collision and friction pressures during the collapse of the two-component particles. This invention considers the dilatation and shear contraction effects and the influence of interstitial water, reflecting the different levels of resistance from water during the movement of different particle components. By considering the anisotropy between and within each component, as well as the influence of interstitial water, the prediction of the underwater collapse morphology of two-component particles is more accurate. By integrating inter-component particle interactions, anisotropic collisions, and dilatation and shear contraction friction, the invention reflects the particle separation phenomenon of small particles sinking and large particles floating during particle collapse.

The invention relates to an intraoperative probe for guiding an excision tool, the intraoperative probe comprising a detection head configured to detect beta particles and / or gamma radiation, the detection head comprising: • a single continuous scintillator (10) able to interact with beta and / or gamma particles and to emit, in response to the interaction, scintillation photons; • a plurality of photodetectors (30), and wherein the intraoperative probe is associated with a signal processing system configured to analyze the signals delivered by the photodetectors (30), the signal processing system comprising: • means for time-coincidence analysis of the signals delivered by a plurality of photodetectors (30), in order to discriminate actual interaction events from thermal noise of the photodetectors; • processing means configured to reconstruct an interaction position of the particles in the continuous scintillator (10) from the relative spatial distribution of the light signals detected by the plurality of photodetectors (30).

The invention relates to a hydraulic excavating machinery multi-domain coupling simulation analysis method and system based on multi-software cooperation, and belongs to the technical field of engineering machinery simulation. The method comprises the following steps: respectively establishing a hydraulic model, a mechanical model and a particle model in Amesim, Adams and EDEM; hydraulic-mechanical domain interaction is realized through an FMU interface, and mechanical-particle domain feedback is realized through an ACSI interface; adams is taken as a center, software calculation step lengths are coordinated through a synchronous control module, and closed-loop coupling simulation of three domains under a unified time axis is ensured. The system comprises a hydraulic power module, a mechanical structure module, a particle interaction module, a data interface module, a synchronous control module and a display analysis module. According to the method, the problems of incomplete coupling of multiple physical fields and mismatching of time steps in traditional simulation are solved, the real operation process of the hydraulic excavator in a granular medium can be accurately simulated, and the precision and reliability of dynamic simulation under complex working conditions are remarkably improved.

This invention belongs to the field of molecular dynamics, specifically relating to a method for calculating short-range interactions between particles based on a GPU. The method includes: designing Map and Reduce operators; dividing the particle space into grids and preprocessing them; dividing the particles into regions; assigning particles to each thread of the GPU according to their particle number and position; selecting all particles in the S-sphere and calculating the short-range forces in the S-sphere using Map and Reduce operations; randomly and uniformly selecting a portion of particles in the CS-sphere and calculating the short-range forces in the CS-sphere using Map and Reduce operations; and combining the short-range forces in the S-sphere and CS-sphere, along with a correction term, to calculate the actual short-range forces of the particles. This invention efficiently calculates short-range interactions between particles using a mainstream GPU architecture. By introducing random forces through sphere partitioning, it significantly reduces the number of nearest-neighbor particles, thereby reducing computational complexity and greatly improving computational efficiency.

The invention provides a high-speed measurement method and system for interaction force between submicron particles based on a phase mask, and aims to solve the problem that the measurement precision and speed of a traditional optical tweezers technology cannot be considered at the same time. According to the core scheme, a phase mask and a high-speed single-point photoelectric detector are combined in a detection light path, firstly, collected particle scattered light is processed through the phase mask, background noise and stray light are efficiently restrained, and therefore weak interaction information is converted into an optical signal with the high signal-to-noise ratio to achieve pico-cattle magnitude measurement precision; and then a high-speed single-point photoelectric detector directly carries out nanosecond-level data acquisition on the optical signal to replace a complex image processing flow, and finally, high-precision nanosecond-level dynamic high-speed measurement on the interaction force between submicron-level particles in a view field is realized. According to the method, the micromechanical measurement performance is remarkably improved.

The invention discloses an optical flow particle interaction system based on real-time attitude detection, and belongs to the technical field of interaction systems. A neural network engine; the attitude estimation layer is connected with the heterogeneous sensing layer, and performs real-time attitude estimation of occlusion robustness through continuous time graph convolution and a sparse space-time attention mechanism; rendering the hybrid particle engine; the server is connected with the neural network engine; the cloud side end computing framework comprises an edge node, a cloud computing cluster and a digital twin scheduler, and the digital twin scheduler computes task allocation according to a map; and the application interface layer is used for providing a standard interface and a development kit, so that a particle interaction function can be conveniently integrated in a third-party application. According to the invention, the problems that the current interaction model is not high enough in human body posture detection precision and poor in adaptability, creative requirements and application scene requirements of different users cannot be met, a new interface cannot be accessed, and the cost of establishing an interaction system by a user is greatly increased are solved.