55 results about "Particle dynamics" patented technology

Techniques for inferring particle dynamics from certain data include determining multiple models for motion of particles in a biological sample. Each model includes a corresponding set of one or more parameters. Measured data is obtained based on measurements at one or more voxels of an imaging system sensitive to motion of particles in the biological sample; and, determining noise correlation of the measured data. Based at least in part on the noise correlation, a marginal likelihood is determined of the measured data given each model of the multiple models. A relative probability for each model is determined based on the marginal likelihood. Based at least in part on the relative probability for each model, a value is determined for at least one parameter of the set of one or more parameters corresponding to a selected model of the multiple models.

The present invention discloses a method and apparatus for separating particles and dissolved matter from a fluid stream. Specifically, the present invention includes a first pressure source which transports untreated fluid into a separator annulus with a filter element disposed therein. The untreated fluid is placed under appropriate pressure sufficient to produce turbulent flow, increased particle kinetics and / or cavitation physics allowing the desired fluid to penetrate and pass into and through the filter media. The filtered fluid is then transported to a collection tank. The contaminant particulate matter retained on the exterior of the filter media may be removed by the instantenous reverse pressurization of the separator annulus by a second pressure source thereby removing the contaminant particles away from contact with the filter media, and which may then be transported to a waste collection tank or a concentrator for further treatment.

The invention provides a diamond abrasive particle abrasion prediction method based on finite element dynamic scribing simulation. According to the method, stress data and temperature data obtained in the abrasive particle dynamic scribing process are fitted and loaded to abrasive particles for calculation and prediction of abrasive particle abrasion. The method comprises the steps that the geometric size of abrasive particles is defined according to actual machining conditions, and modeling software is used for conducting parametric modeling; a workpiece model is established in finite element simulation software, and workpiece and abrasive particle material attribute endowing, assembling work, analysis step setting, grid division, contact setting and the like are sequentially completed; single diamond abrasive particle scribing simulation is finished, and stress data, abrasive particle temperature distribution data and the like are obtained in the scribing process through post-processing; mathematical software is used to fit scribing time-stress data and scribe time-temperature data into a polynomial; and the obtained stress and temperature data are loaded on the abrasive particles in the form of an equation to predict the wear area and the wear amount of the abrasive particles. Combined dynamic simulation of single abrasive particle scribing and abrasion evolution and abrasion loss prediction of the diamond abrasive particle scribing process are carried out by combining modeling software, a finite element simulation analysis technology and mathematical software.

The invention relates to a cohered rubber particle dynamic screening and smashing device with the functions of material conveying, cohered rubber particle scattering and material leakage, and a smashing and conveying method. The cohered rubber particle dynamic screening and smashing device comprises a spiral extruding machine, a material collecting hopper, a pulverizer and an air blower, wherein the discharging hole of the spiral extruding machine is located right above the feeding hopper of the pulverizer, the discharging hole of the spiral extruding machine is connected with the feeding end of a screening hole conveying pipe, the discharging hole of the screening hole conveying pipe directly faces the feeding hopper of the pulverizer, the discharging hole of the pulverizer is communicated with one way of a tee joint, and another two ways of the tee joint are communicated with an air pipe and the air blower respectively and are communicated with a discharging pipe of the material collecting hopper. The cohered rubber particle dynamic screening and smashing device has the advantages that the screening hole conveying pipe has a function of scattering cohered rubber particles, a function of a filter screen and a function of conveying the cohered rubber particles to the pulverizer due to the design of the screening hole conveying pipe, and besides, the air blower is adopted for conveying the rubber particles pulverized by the pulverizer, the manual operation is not required and pulverized rubber particles can be conveyed automatically.

The invention discloses a determination method of indoor particle sedimentation parameters based on dynamic mass balance, and belongs to the field of environmental science. The method includes the following steps: firstly, selecting a to-be-measured room, and arranging dust particle counters inside and outside the to-be-measured room as measuring instruments for indoor and outdoor particles; secondly, starting the measuring instruments for synchronous determination; thirdly, obtaining the parameters of indoor and outdoor particle concentration ratios, ventilation times, sedimentation rates andpermeability factors through the dust particle counters and data analysis; and finally, establishing a mass balance equation based on the dynamic balance of particles and calculating to obtain a sedimentation rate Kcomp and permeability P of the to-be-measured room by using a least square method. The determination method of the indoor particle sedimentation parameters based on the dynamic mass balance determines the permeability and the sedimentation rate by using the mass balance equation, which can better understand indoor particle dynamics and behavior under natural ventilation conditionsand helps to analyze the particle size distribution of the indoor particles.

The invention discloses a method for organizing the mixing of spray jet and mainstream gas. By analyzing the mixing mechanism and law of spray jet and mainstream gas, combined with particle dynamics, vortex dynamics and other theories, a blending method based on regulation and control is proposed. The large-scale vortex structure-symmetric anti-vortex pair that dominates the diffusion characteristics of spray droplets in the flow field is used to realize a new idea of ​​rationally organizing the mixing process of the spray jet and the mainstream gas, and according to the characteristics of the symmetrical anti-vortex pair in the mixing flow field The internal relationship between the size and the parameters of the flow field, the determination method of the spray jet atomization characteristic parameters and the nozzle selection method based on the mainstream gas state are given, which solves the problem of mixing the spray jet with the mainstream gas in the current industrial process. The problem of lack of organizational skills in the mixed process.

The embodiment of the invention provides a method and apparatus for implementing a dynamic interface. The method comprises steps of generating interface elements and a corresponding animation effect, wherein the interface element includes a background, objects in the background and particle images corresponding to the objects; establishing a particle emitter and setting the attribute of the particle emitter; generating one or more particle sources, and defining particle parameters of the particle sources, wherein the particle parameters includes contents which are particle images of the particles; adding the one or more particle sources in the particle emitter; and implementing the background and the animation effect corresponding to the objects in the background, and displaying a dynamic particle effect of the objects using the particle emitter. According to the method and apparatus for implementing the dynamic interface provided by the embodiment of the invention, a particle dynamic effect can be displayed on the interface, tracks and special effects of motions of the true-life objects can be simulated at high order, and the third dimension effect and the interest of the interface can be improved.

The invention discloses a device and method for measuring the liquid flow-solid conversion mechanism in an impact process. The device comprises a pressure box body and a loading tank arranged in the pressure box body, wherein an air valve is arranged on the pressure box body; a loading rack is also arranged in the pressure box body; the loading tank is arranged in the loading rack; an impact device connected with a motor power device and ascending and descending on the loading rack is arranged at the upper end of the loading rack; the lower end of the impact device is connected with an impact object which can acts on the loading tank; a speed measuring sensor is arranged on the impact object; pressure sensors are arranged at the bottom and on the side surfaces of the loading tank; a video capture instrument and a particle dynamics scanner are arranged on the loading rack; a stop block is further arranged on the loading rack and positioned right below the impact device. According to the invention, the liquid flow-solid conversion critical speed in the impact process can be well measured, different formulas can be evaluated and the matching can be optimized.

The invention discloses a method for identifying wave mechanical damage of a high-speed milling cutter under the intermittent impact load effect. The method is technically characterized by comprising steps as follows: I, a transient cutting force model and an equation of particle dynamics of the high-speed milling cutter are established; II, a wave equation of a stress wave of the high-speed milling cutter is established; III, an attenuating stress value and an attenuation rate of the stress wave of the high-speed milling cutter are solved; IV, the wave mechanical damage of the high-speed milling cutter is identified. With the method, the internal relation of macroscopic and mesoscopic structure domains of the high-speed milling cutter can be disclosed, local macroscopic and mesoscopic damage of the milling cutter is identified, a high-frequency stress wave collecting area of the high-speed milling cutter can be determined, trans-scale association analysis can be performed, in combination with molecular dynamic simulation, the part, prone to damage, of the high-speed milling cutter and the type of the damage in the mesoscale can be identified, the problem of identification of potential damage positions and damage types of a milling cutter assembly under the high-speed intermittent impact load effect is solved in an emphasized manner, and meanwhile, the problem of multi-scale evolution of the wave mechanical damage of the high-speed milling cutter is also solved.