72 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.

Method for measuring a target particle property. A suspended microchannel resonator is calibrated to determine the relationship between a detected mass and a resonance frequency shift of the resonator. The target particle is suspended in a fluid and introduced into the resonator, and the resonator frequency shift due to the particle is measured. Target particle mass is calculated from the resonator frequency shift, the target particle density, and the fluid density. A target particle property such as size or volume is determined from the calculated target particle mass.

Metallocene compounds of the invention are useful as olefin polymerization catalysts or catalyst components. Olefin polymerization processes of the invention involve an olefin polymerization catalyst containing the metallocene compound. In detail, the olefin polymerization catalysts can catalyze with high polymerization activity the production of olefin polymers having high melt tension, excellent mechanical strength and good particle properties, and the olefin polymerization processes involve the catalysts. Ethylene polymers according to the invention are obtained by the polymerization processes and have higher processability and easy-opening properties and particularly excellent mechanical strength compared to conventional ethylene polymers. Thermoplastic resin compositions of the invention contain the ethylene polymers. In more detail, shaped articles or films are obtained from the ethylene polymers or the thermoplastic resin compositions containing the ethylene polymers, and laminate films include the films.According to the invention, a single or plural kinds of bridged metallocene compounds having differing cyclopentadienyl-derived groups afford macromonomers that are a source of long-chain branches and simultaneously catalyze the repolymerization of the macromonomers into olefin polymers having a large number of long-chain branches, small neck-in in the T-die extrusion, small take-up surge and superior mechanical strength. The olefin polymerization catalysts and the polymerization processes can efficiently produce the olefin polymers.

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.

Method for measuring a target particle property. A suspended microchannel resonator is calibrated to determine the relationship between a detected mass and a resonance frequency shift of the resonator. The target particle is suspended in a fluid and introduced into the resonator, and the resonator frequency shift due to the particle is measured. Target particle mass is calculated from the resonator frequency shift, the target particle density, and the fluid density. A target particle property such as size or volume is determined from the calculated target particle mass.

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 MA as a central metal and an aqueous solution containing a cation of predetermined metal atom MB, thereby precipitating the crystal of a Prussian blue-type metal complex having the metal atom MA and the metal atom MB; and then mixing the Prussian blue-type metal complex with an aqueous solution containing a metal cyano complex anion having the metal atom MC as a central metal and / or an aqueous solution containing a cation of the metal atom MD. 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 liquid slag wind quenching method for improving the performance of high titanium blast furnace slag is to blow liquid slag with compressed air for cooling and crushing so as to obtain granular slag with high strength and proper granularity. The granular slag meets the requirement of artificial sand for concrete and may be used in producing high grade concrete. Utilizing high titanium blast furnace slag as building material in large scale can raise economic benefit and eliminate environmental pollution caused by high titanium blast furnace slag.

The invention discloses a near-infrared spectral tomography reconstruction method based on a neural network and belongs to the field of medical image processing. In a Boltzmann radiation transmissionequation, a light transmission process is regarded as an absorption and scattering process of photons in a medium, the interaction between light and tissue is determined by absorption coefficients, scattering coefficients and phase functions of reactive scattering distribution, only particle properties of the light are considered in transmission, and the volatility of the light is not considered;therefore, phenomena of polarization and interference correlated with the volatility of the light are not considered, and only the energy transmission of the light is tracked. The reconstruction method based on the BP neural network is used for reconstructing the distribution of the absorption coefficients of the light, and a reconstruction result of the distribution of the absorption coefficientscan be obtained through calculation. By means of the method, not only can the distribution of the absorption coefficients be accurately reconstructed, but also high computational efficiency is achieved.

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.

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.

A process for olefin polymerization, including polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst composed of: a fine particle carrier; (A) a transition metal compound of a Group IVB metal of the periodic table, containing a ligand having a cyclopentadienyl skeleton; (B) an aluminoxane compound; and optionally (C) an organoaluminum compound, wherein said aluminoxane compound has an alkyl groups to aluminum ratio of 1.3 to 2.1; said transition metal compound (A) and said organoaluminum oxy-compound (B) and said organoaluminum compound being supported on the fine particle carrier; and said solid catalyst having a bulk density of 0.3 g / cm3 to 0.5 g / cm3 and a fluidity index of 45 to 70 and an olefin polymerization process using the olefin polymerization catalyst; and an olefin prepolymerized catalyst obtained by prepolymerizing the catalyst, and an olefin polymerization process using the olefin prepolymerized catalyst. The olefin polymerization process produces a polymer showing excellent particle properties and an olefin polymer which does not stick to the wall of the polymerization reactor.

Highly uniform silica nanoparticles can be formed into stable dispersions with a desirable small secondary particle size. The silican particles can be surface modified to form the dispersions. The silica nanoparticles can be doped to change the particle properties and / or to provide dopant for subsequent transfer to other materials. The dispersions can be printed as an ink for appropriate applications. The dispersions can be used to selectively dope semiconductor materials such as for the formation of photovoltaic cells or for the formation of printed electronic circuits.

A method is provided for controlling a spray process that may include measuring a particle property associated with a spray jet of particles, calculating a centroid for the measured particle property and using the calculated centroid as a control parameter for controlling the spray process. At least one operating parameter associated with the spray process may be adjusted in response to the calculated centroid to change a trajectory of at least a portion of the particles within the spray jet of particles. The operating parameter may be adjusted so that an ensemble of particles having the highest measured temperature and an ensemble of particles having the highest measured velocity and an ensemble of particles having the highest measured flow rate are moved more closely together to create a common region proximate a surface of a substrate to be coated by the spray process. This may be done manually prior to a coating run or continuously during a run using a closed-loop feedback circuit (43) in a computer-controlled (38) spray system.

The invention relates to a method and system for monitoring of particles properties in a stream and the use of such method and system. In particular, the invention concerns sampling of liquids like aqueous suspensions or filtrates that contain solid matter in forest industry, oil and mining industry, as well as in and water treatment, desalination or water reuse processes, and in subsequent measurement of the samples. A sample from a stream of liquid is dyed to stain particles contained in the sample, which is conducted to a first flow chamber having means for causing said sample to be divided into particle populations according to their size or mass. A liquid flow is applied through the first flow chamber to cause at least one particle population to flow into a second flow chamber. The particle populations are measured to produce at least one measurement signal representative of the amount and / or properties of the particles, and processing extract key variables of each particle population and presenting them as an analysis of particle populations or the whole sample in terms of a count and size of particles and / or their hydrophobicity.

A method and system for identification of holographic tracking and identification of features of an object. A holograph is created from scattering off the object, intensity gradients are established for a plurality of pixels in the holograms, the direction of the intensity gradient is determined and those directions analyzed to identify features of the object and enables tracking of the object. Machine learning devices can be trained to estimate particle properties from holographic information.

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.

A measurement method comprising: transmitting a plurality of ultrasonic signals to the fluid to be measured; receiving an return signal reflected or scattered from the particles in the fluid under test; calculating a one or more calculated values of the R parameter associated with the particle properties based on the return signal; determining the theoretical curve of the R parameter associated with the particle properties; and determining the mean diameter of the particles in the fluid based on the one or more calculated values of the R parameter and the theoretical curve of the R parameter; determining the mass concentration of the particles in the fluid according to the mean diameter of the particles. Embodiments also provide a measurement system for measuring the mean diameter and mass concentration of the particles.

The invention provides a preparation method of an anode material, an anode material and a lithium battery. The preparation method of an anode material comprises the steps of: adding graphite into a polyacrylonitrile solution to obtain a suspension; separating the suspension to obtain a solid phase; adding the solid phase obtained in the step into a coagulating bath to form a precursor of the polyacrylonitrile coated with graphite; and pre-oxidizing and carbonizing the precursor of the polyacrylonitrile coated with graphite to obtain an anode material. The anode material prepared by the preparation method provided by the invention has the good single-particle property, obviously improves the first charge-discharge capacity and the first efficiency of the lithium battery prepared by the anode material.

Modified particles obtained by contacting dry particles(a) with an organometallic compound(b), and subsequently a compound(c) having a functional group containing active hydrogen or a non-proton donative Lewis basic functional group and an electron attractive group; a carrier comprising said particles; a catalyst component for olefin polymerization comprising said particles; a catalyst for olefin polymerization comprising said particles(A) and a transition metal compound(B), or an additional organometallic compound (C) therewith; and a method for producing an olefin polymer with said catalyst for olefin polymerization. According to the present invention, there is provided a catalyst for polymerizing an olefin giving an olefin polymer excellent in particle properties with a high activity when applied to a slurry polymerization or gas phase polymerization, and a method for producing a olefin polymer using said catalyst.

Provided are methods and systems that characterize a property of a particle suspended in a fluid sample in a label-free manner. Detection elements are provided fluidically adjacent upstream and downstream from a modulation element. Fluid sample containing particles flows across a first detection element and a first particle parameter detected for each particle that passes the first detection element or a first aggregate particle parameter for a plurality of particles that pass the first detection element. The particles flow from the first detection element to a first modulation element, wherein the first modulation element effects a change in a property of the particles flowing past the first modulation element. A second detection element then detects the particle parameter again or a second aggregate particle parameter for a plurality of particles that pass the second detection element. Comparing the first and second particle or aggregate parameters thereby characterizes the particle property.

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.

Provided is a method for preparing a support for olefin polymerization catalysts used in polyolefin preparation processes. Particularly, provided is a novel method for preparing a support for olefin polymerization catalysts comprising the reaction of metal magnesium with an alcohol in the presence of an additive for initiating the reaction, characterized in that halogenated nitrogen compound is used as the additive for initiating the reaction, resulting in a spherical dialkoxy magnesium support.The spherical support for olefin polymerization catalysts obtained from the method of the present invention has a spherical particle shape with a smooth surface, uniform particle size distribution and 0.25 g / cc or more of bulk density, which makes it suitable for preparing a catalyst that is enough to meet the particle properties required by commercial olefin polymerization processes including, for example slurry polymerization, bulk polymerization, gas phase polymerization and the like.

The invention discloses a testing device for measuring physical properties of soft structure particles and an application method of the testing device. The testing device comprises a conical flask, a convolutional oscillator, a laser particle analyzer, a peristaltic pump, a widemouthed sucker, a plastic pipe and a computer. The conical flask serving as a sample chamber for uniformly mixing the soft structure particles is fixed on the convolutional oscillator; samples in the conical flask are uniformly mixed through oscillating stirring of the convolutional oscillator; the peristaltic pump is used for supplying pumping force to enable the samples in the conical flask to enter the laser particle analyzer to perform particle property monitoring; the widemouthed sucker serves as a sample taking and injecting tool; the computer is used for analyzing the data of the monitored soft structure particles. The testing device remedies the defects of conventional measurement methods, can obtain the physical properties, such as particle size distribution and fractal dimension of particles, of the soft structure particles in the condition that soft particle structures are not destroyed basically, and is particularly applicable to the measurement of the properties of aggregates (flocs) be divorced from the original flocculation conditions and aggregates (flocs) which cannot be directly subjected to on-line flocculation monitoring by the laser particle analyzer.

The invention belongs to the field of nano materials, and discloses a method for preparing nano bismuth oxide by using a liquid phase precipitation method in the presence of lignosulfonate serving as a surfactant. According to the technical scheme of the method, lignosulfonate is used as a surfactant and bismuth nitrate and sodium hydroxide are used as raw materials; the concentration of sodium lignosulfonate is adjusted to 2.5-7.5 g / L, and then nano bismuth oxide is prepared by using a liquid phase precipitation method. In the process of precipitation, the addition of different amounts of surfactants can achieve a steric hindrance effect, so that the direct contact between particles is reduced, the surface tension is lowered, and the surface energy is reduced, thereby lowering the aggregation degree of a dispersion system, caused by the action of a hydrogen bond or VDW (Van der Waals' force), keeping the dispersion system stable realtively, and effectively controlling the size and morphology of nanoparticles. The method for preparing nano bismuth oxide by using a liquid phase precipitation method disclosed by the invention is low in cost and simple to operate, and prepared products are uniform in particle distribution, high in particle properties, good in particle size dispersity and good in morphology; therefore the method can be easily industrialized.

The present invention is in the field of the flavouring of foods. In particular, the present invention is directed to a process for the encapsulation of flavours and / or aromas. The particles are then later incorporated into the end preparation (the food), such as, for example, instant coffee. The focus is in particular firstly to obtain particles with high aroma loading in order to ensure a long-lasting aroma protection during storage, and secondly to control the particle properties in such a way that an optimum miscibility of the particles with foods is made possible. Decisive aspects in this connection are primarily shape, size and particle density. These aspects together are intended to bring about an improved taste experience for the end consumer when consuming the particles.