71 results about "Particle properties" patented technology

The present invention discloses an inversion method for laser radar data of atmospheric particulate matter particle size spectrum spatial and temporal distribution. The method comprises: by measuring back scattered echo signal of atmospheric particulate matters via laser radar, accurately inverting to obtain extinction coefficients of atmospheric particulate matters in three wavelengths of infrared, visible and ultraviolet bands at different heights from the ground; building lognormal distribution spectral functions of four aerosol components and parameters thereof, for obtaining refractive indexes at different bands of different aerosols and the mixing ratio of the four aerosol components in different aerosol modes; obtaining the particle size spectrum normalized at 0.55 micron of the extinction coefficient of each aerosol basic component, and comparing with a standard spectrum for authentication; and finally performing iterative calculation to the extinction coefficient spectrums obtained by laser radar surveying to obtain the aerosol mixed volume ratio of each height, thus obtaining atmospheric particulate matter particle size distribution of different heights at different times. According to the inversion method of the invention, valid data are provided for analysis and study of particle properties and variation patterns, especially, an effective means for spatial and temporal change detection for the particle-size spectrum of the atmospheric particulate matters is provided, and active three-dimensional telemetry technology suitable for atmospheric particulate matter particle size distribution is established.

Devices, systems and methods for measuring and detecting properties of a variety of particles or cells in suspension. Properties, such as, for example, velocity of particles, concentration and/or size may be measured according to the methods of the invention. Acoustic energy may be introduced to a focal zone and narrow band interrogating signals may be used. The acoustic energy may cause movement or streaming of the fluid or suspension. The acoustic streaming may allow a Doppler effect measurement without any other source of velocity.

A dam bursting flood routing simulation method based on two-dimensional SPH belongs to the technical field of geographic-science course simulation and geographic information systems. By the method, data information of a reservoir and downstream geographic space is obtained firstly, a flood routing two-dimensional mode based on a shallow water equation is established according to the obtained data, and a simulation course undergoes initialization which comprises initial configuration of particle properties, establishment of a neighborhood particle list of particles and setting of parameters; simulation circulation is started then, wherein whether boundary virtual particles are set is determined according to positions of the particles, and the neighborhood particle list of each water particle is updated; force borne by each water particle is calculated, and then the position and the speed of each water particle at the next time step are calculated; and collision detection is carried out, boundary punishment force is applied to change the position and the speed of the particle in case of a boundary, a fluid surface is extracted according to particle distribution, and the extracted fluid surface is rendered. The method provided by the invention can realize the relatively real analogue simulation of the large-scale dam bursting flood routing situations.

The present invention relates to a method and system for determining particle properties. Such properties may for example be charge, size, drift, etc. The method comprises determining (110) an electric mobility distribution based on detection of individual particles. The latter may be performed for a single particle over time, for a plurality of particles at the same time or in a combination thereof. The method also comprises deriving a particle property based on a periodicity in the electric mobility distribution.

One embodiment of the invention provides a computer-implemented simulation system for discrete element modeling. The system comprises discrete elements corresponding to objects or particles, where each particle has a predefined set of properties. The system further has an interface for receiving at least one behaviour model for applying to the particles, and supports receipt from the at least one model of one or more custom properties for the particles. The system is responsive to receipt of the one or more custom properties to extend the discrete elements to contain both the predefined set of properties and the one or more custom properties for the particles. The system is operable to perform a simulation using discrete element modeling by applying the at least one behaviour model to the particles and to update accordingly values of the predefined and custom properties. The values of the custom particle properties are stored with the default (built-in) particle property values and can be analysed and visualised in the same way as the default property values.

The invention relates to novel methods and to devices for a measuring and analysis apparatus that measures impurities and/or particles in a gas or air. In a particle separation step, target particles having predetermined particle properties are separated from remaining particles from a gas or gas mixture such as air or a liquid, in short a fluid, that contains a particle mixture, and the occurrence and/or frequency of said target particles is determined in a measuring chamber. The likewise novel cooling of the radiation sources required for measurement permits the use of such having high power, as is required for measuring few particles or the smallest impurities. A further novel expansion of the electrical measurement range allows small but also abundant particles and impurities to be measured. In addition, a novel interface simplifies the start-up of the apparatus.

Methods and devices for detecting particles in a fluid within a medium, such the analyzing device includes: a source adapted to transmit signals into the medium; at least one detector adapted to detect signals transmitted from the source such that the at least one detector and the source are structured and arranged on opposite sides of the medium; at least one processing unit in communication with the at least one detector and adapted to produce a plurality of output signals representative of one of at least one particle characteristic or one or more particle property.

To provide a method of producing Prussian blue-type metal complex nanoparticles without necessarily requiring complicated steps and an excessive amount of raw materials, but allowing one to obtain nanometer-size fine particles having desired fine particle properties, and Prussian blue-type metal complex nanoparticles obtained by the method, a dispersion of the nanoparticles, a method of regulating the color of the nanoparticles, and an electrode and a transmitted light-regulator each using the nanoparticles; Prussian blue-type metal complex nanoparticles are produced by: mixing an aqueous solution containing a metal cyano complex anion having predetermined metal atom M_A as a central metal and an aqueous solution containing a cation of predetermined metal atom M_B, thereby precipitating the crystal of a Prussian blue-type metal complex having the metal atom M_A and the metal atom M_B; and then mixing the Prussian blue-type metal complex with an aqueous solution containing a metal cyano complex anion having the metal atom M_C as a central metal and/or an aqueous solution containing a cation of the metal atom M_D. The thus-obtained Prussian blue-type metal complex nanoparticles have a preferable electrochemical responsiveness, and the particles can be used for forming a thin film including them to construct a light-transmitted regulator.

The invention provides an apparatus for on-line detection of particle properties during fluidized-bed granulation. The apparatus comprises a hermetic shell, a sample acquisition mechanism, a first visual inspection unit, a second visual inspection unit and an image processing system, wherein the first visual inspection unit comprises a first camera, a circular tray and a pressure transducer; the image processing system acquires the particle size information of particles from a falling image of a sample and acquires the angle alpha of repose from an image of a sample accumulation; the second visual inspection unit comprises a measuring cylinder, a measuring-cylinder fixing plate, a light source, a vibrating table and a second camera; and the image processing system acquires the apparent density rho of the particles from the image of the sample in the measuring cylinder before starting of the vibrating table and acquires the tap density rho<t> of the particles from the image of the sample in the measuring cylinder during vibration of the vibrating table. The apparatus provided by the invention can realize on-line detection of the particle size distribution, repose angle, apparentdensity, tap density, porosity and Hausner ratio of the particles during fluidized-bed granulation.