5 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.

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,

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).

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.