124 results about "Body volume index" patented technology

Methods and systems utilizing the data provided by a non-contrast-enhanced CAC scan that is left unused by the “whole-heart” Agatston or volume scores. Agatston and volume scores summarize overall coronary calcium burden, but do not show the number of vessels involved, the geographic distribution of the lesions, the size and shape of the individual lesions and the distance of the lesions from the coronary ostium. The methods and systems described herein extract and use the enhanced information provided by 3-D CAC scan data and significantly increases its clinical predictive value by providing vessel and lesion specific CAC scores which are superior to the whole-heart Agatston and volume scores in predicting obstructive Coronary artery disease (CAD).

A hydrocarbon exploration method is disclosed for developing a model of at least one effective material property of a subsurface reservoir as a function of the composition and structure of the reservoir rock. In one embodiment, the method comprises: obtaining a 3D image (102) of a rock sample characteristic of a reservoir of interest (101); segmenting the 3D image into compositional classes (103) based on similarities in mineralogy, structure and spatial distribution; selecting a model (105) that relates an effective material property of interest to the volume fractions of each compositional class; and determining the parameters of the model (106). The model may be used to assess the commercial potential of the subsurface reservoir (107).

The present invention provides a new method and device for disease detection, more particularly cancer detection, from the analysis of diffuse reflectance spectra measured in vivo during endoscopic imaging. The measured diffuse reflectance spectra are analyzed using a specially developed light-transport model and numerical method to derive quantitative parameters related to tissue physiology and morphology. The method also corrects the effects of the specular reflection and the varying distance between endoscope tip and tissue surface on the clinical reflectance measurements. The model allows us to obtain the absorption coefficient (μa) and further to derive the tissue micro-vascular blood volume fraction and the tissue blood oxygen saturation parameters. It also allows us to obtain the scattering coefficients (μs and g) and further to derive the tissue micro-particles volume fraction and size distribution parameters.

Method for evaluating cement integrity in a cased well environment using a logging tool that has a neutron source and one or more neutron or gamma ray detectors. Neutron porosity logs are obtained from the well before (42) and after (41) casing. This log data along with well dimensions and material composition parameters are the input quantities to a multi-parameter database (43) that is constructed by computer modeling or laboratory experiments to relate volume fraction for fluid filled channels in the cement sheath to the input quantities. The channel volume fraction (45) corresponding to the input quantities is identified or interpolated (44) from the multi-parameter database.

The invention discloses a peripheral blood mononuclear cell serum-free freezing medium. The peripheral blood mononuclear cell serum-free freezing medium is prepared from the following components in percentage by volume: 5 to 20% of dimethyl sulfoxide, 0.5 to 10% of dextran 40, and the balance of plasmalyte A. The invention further discloses a method for freezing peripheral blood mononuclear cells through the peripheral blood mononuclear cell serum-free freezing medium. Compared with the prior art, the freezing medium is free of animal serum, human serum and a cell culture medium, and has a good freezing effect; the cells can be directly applied to the clinic after resuscitation and can be also induced in vitro into immune cells NKT and CIK and have high application value in the clinic.

The present invention provides a system and method for multi-phase flow decomposition using electrical capacitance imaging techniques. The present invention provides a system and method to obtain permittivity distributions at a plurality of frequency markers using volume tomography image reconstruction to determine volume fraction of each phase and to produce images of the volume fraction for each phase.

The invention discloses an establishment method for a total-cell three-dimensional two-phase model of a proton exchange membrane fuel cell. The model construction method comprises the steps of constructing a global conservation equation, constructing a liquid water distribution relevant conservation equation, constructing an electrochemical reaction relevant conservation equation, introducing a catalyst layer agglomerate model and constructing an expression of conservation equation source items. Relevant equations are established according to the steps, and through numerical solving calculation, gas concentration distribution, liquid water volume fraction distribution, membrane water distribution and cell performance in the proton exchange membrane fuel cell under a catalyst particle volume fraction and an electrolyte volume fraction in catalyst layers can be obtained. Most traditional models ignore liquid water in channels or do not consider the influence of gas-liquid phase change inthe channels. According to the model, a liquid water saturation equation is solved in the channels, and the gas-liquid phase change process is considered; and after liquid water distribution in the channels is obtained, the influence of liquid water on gas flowing in the channels is reflected through correction of a viscosity value in a gas momentum equation, and therefore a good data basis is provided for further research.

The invention relates to a method for preparing low-temperature-resistant corrosion-resistant wind-power spherulitic graphite cast iron, which relates to a method for preparing spherulitic graphite cast iron and solves technical problems of poor impact toughness and poor corrosion resistance on a condition that the current spherulitic graphite cast iron is at -60 degrees centigrade; a preparation method comprises the following steps: 1, smelting iron liquid; 2, balling and inoculation treatment; and 3, thermal treatment; the low-temperature-resistant corrosion-resistant wind-power spherulitic graphite cast iron is acquired through the preparation method disclosed by the invention; ferrite volume fraction reaches to 95-99%; the content of residual magnesium is within 0.042-0.050%; balling process is ensured not to generate recession; anti-extension strength is 370-385N/mm<2>; yield strength is 255-268N/mm<2>; extension ratio is 24-26%; rigidity is 156-164HBW; conventional performance index is relatively high; an impact value at -60 degrees centigrade is within 12-14J/cm<2>; impact toughness is relatively good; and the method can be applied in wind-power generation equipment.

The invention discloses a natural gas heat value calculation method based on natural gas component spectrum analysis. In the prior art, the natural gas is still charged by using volume and the heat values of the natural gases from different gas sources are greatly different. In the method, a measured material is irradiated by using infrared light, the light absorbance of the measured material is measured and the content of the measured component is calculated according to the light absorbance. The volume fraction of the components of a mixed gas in a pipeline is calculated through the concentration of the components measured by infrared spectroscopic analysis by utilizing a Fourier infrared spectrometer to obtain the natural gas heat value, so that a possibility is provided for realizing that the natural gas is charged by using the heat value. According to the invention, the spectroscopic analysis technology is employed and is characterized by high resolution, high sensitivity, high signal-to-noise ratio and quickness, and the system is compact in volume and high in stability.

A system and method for multi-phase segmentation of noisy 3D x-ray tomography images representative of porous material minimizing data smoothing which processes 3D x-ray tomography images to obtain a standardized intensity image, segments the standardized intensity image into at least 3 phases, calculates volumetric fractions and spatial distributions of the segmented phases and compares them with target values, and if the calculated fractions are not close enough to the target values, repeats the necessary segmentation steps until the calculated volumetric fractions are within a given tolerance to the target values. The segmentation steps include computing a median/mean-filtered-gradient image of the standardized intensity image, creating an intensity vs. gradient graph from the median/mean-filtered-gradient image and the standardized intensity image, partitioning the intensity vs. gradient graph into at least 3 regions, using thresholds defining the regions to segment the standardized grey scale image to create a segmented image, and applying a despeckler filter to remove noise in the segmented image.

The invention relates to a large-swelling-amount welded tube and a manufacturing method thereof, belonging to the technical field of welded tube steel. The welded tube contains the following chemical components in percentage by mass: 0.02-0.10wt% of C, 2.0-6.0wt% of Mn, 0.2-1.0wt% of Si, less than 0.01wt% of S, less than 0.02wt% of P and the balance of Fe and inevitable impurities, and can also contain the following one or more chemical components: 0.1-0.6wt% of Ni, 0.1-0.6wt% of Cr, 0.1-0.5wt% of Cu, 0.01-0.1wt% of Nb, 0.01-0.1wt% of V and 0.01-0.02wt% of Ti. The manufacturing method comprises the following steps: performing converter steel making, controlled rolling and controlled cooling; then performing crimping plate processing on steel strips; forming a swollen blank tube through high frequency welding (HFW); and finally performing heat treatment to obtain residual austenite of which the volume fraction is larger than 5% in the structure. The invention ensures that the material has high strength level and simultaneously has high plasticity, the uniform elongation rate is up to 20% or above, and all the mechanical performance indices meet the requirements of API and other relevant standards.

The invention provides a kit used for obtaining a full liver stent, comprising perfusion liquid I: 0.1 to 10 percent (volume fraction) of Tris-HCl solution of non-ionic detergent; and perfusion liquid II: 0.1 to 10 percent (mass fraction) of Tris-HCl solution of ionic detergent. The invention also provides a method for obtaining the full liver stent by using the kit. The invention leads the substantive organ liver to be acellular to completely and simultaneously reserves the structure and large part of components of extracellular matrix, thus being used as materials of biological stents and being applied to research of biological artificial liver.

The invention discloses a method for predicting TC6 titanium alloy forging piece microstructural parameters, aimed at addressing the technical problem of poor practicality of current methods for predicting forging piece microstructural parameters. The technical solution includes the following steps: firstly determining TC6 titanium alloy forging deformation temperature, strain rate and 9 membership functions of straining and 27 fuzzy rules, then establishing a mathematical model between TC6 titanium primary [alpha] phase crystal grain size and volume fraction; adopting TC6 titanium alloy high temperature compression deformation experiment data, optimizing weight coefficient and weight value of the fuzzy rules, substituting the optimized weight coefficient and weight value to the mathematical model between TC6 titanium primary [alpha] phase crystal grain size and volume fraction, obtaining a prediction model between TC6 titanium primary [alpha] phase crystal grain size and volume fraction. According to the invention, the maximum error between a predicted testing sample result between TC6 titanium alloy forging piece crystal grain size and volume fraction and an experimental result is less than 5 %. The method of the invention has higher accuracy and strong practicality.

The invention provides pseudo-boehmite and a preparation method thereof, wherein the particles with a particle size of less than 20 [mu]m account for less than 10%, the particles with a particle sizeof 20-50 [mu]m account for 75-95%, and the particles with a particle size of more than 50 [mu]m account for less than 15%. According to the present invention, the preparation method adopts a two-stagecontinuous synthesis reaction, and a treatment agent is added in the preparation process to form pseudo-boehmite grains with the equal grain size, wherein the preparation process does not require theaging operation so as to solve the problem of poor adhesion of the pseudo-boehmite prepared in the prior art.

The invention relates to a method for purifying carbetocin. The method is characterized by comprising the following steps of: 1, dissolving a carbetocin crude product by using water, and regulating pH to be acidic; 2, arranging gradients according to volume fraction, and flushing a polymer reverse-phase filled column by using a mobile phase A; 3, loading a solution obtained from the step 1 into a polymer reverse-phase filler; 4, arranging the gradients according to the volume fraction, wherein a mobile phase B is 5% in the initial state of the eluted gradients and is kept for 2 minutes, then the proportion of the mobile phase B is increased to 25% within 5 minutes, and then the proportion of the mobile phase B is increased to 40% within 30 minutes; collecting all eluted distillates; 5, drying the eluted distillates to obtain the pure product carbetocin.

The invention discloses a tracer-gas-volume-fraction-based integral measurement and calculation method for an air leakage of a working face behind a support. At a lower corner angle of a working face, tracer gas is released to a place with the certain depth in a goaf region near the lower corner angle of the working face at a constant amount; gas is extracted from gaps between supports by using gas measuring pipes at certain intervals along the working face length direction; a tracer gas volume fraction at a measuring point is analyzed; a tracer gas volume fraction distribution curve after supports is drawn, wherein a horizontal coordinate region included under the curve is a goaf facing working face tunnel air-leak region. With the integral method, the area encircled by the tracer gas volume fraction curve is solved and a tracer gas volume fraction of goaf air-leak attenuation is obtained; the attenuation tracer gas volume is divided by the tracer gas volume fraction to obtain a total air leak value of leaking in the goaf of the U-shaped ventilating working face. A ratio value of all segments of tracer gas volume fractions to volume fractions after integration is multiplied by the total air leak value of the goaf to obtain all air leak values of the working face.

The invention discloses a quick high-sensitivity microbiological identification method based on micromolecular metabolic substance spectral analysis. The micromolecular metabolic substance of microorganism is served as a detection object of the method, and the microorganism is identified through combining a mass spectrometry with a chemometrics method. The method specifically comprises the following steps: 1, culturing a monoclonal growing microorganism strain to be identified; 2, centrifuging an obtained monoclonal microorganism thallus sample to be identified to remove a medium, adding water or a phosphate buffer solution with the pH value of 7.2-7.6 to wash, and centrifuging to remove the residual medium; 3, adding ethanol water which has the volume fraction of 75-95% and is 2-4 times of the volume of the monoclonal microorganism thallus into the monoclonal microorganism thallus to be identified, and thus obtaining an extracting solution sample; 4, carrying out mass spectrometry test on the extracting solution sample; and 5, acquiring 5-20 spectral peaks from a sample mass spectrogram, analyzing the obtained data through utilizing a chemometrics method based on multi-variate statistical analysis, and realizing the thallus identification.

A method for identifying and measuring volume fraction constituents of a fluid using time domain analysis and frequency domain analysis to identify individual volume fraction constituents within a pipe on a real time basis and to measure the volume of the individual volume fraction constituents flowing through the pipe on a real time basis.

A method for predicting creep aging behavior of Al-Cu alloy unde variable stress is provided. The uniaxial tensile stress aging treatment was carried out on a creep tester, and the creep curves were obtained under different stress levels at specific temperatures. Then the tensile tests were carried out after air cooling to room temperature, and the yield strength changes under different stress aging were obtained. The evolution of dislocation density in step one creep process was calculated by X-ray diffraction method. The changes of theta 'and theta size and volume fraction of main strengthening phases in creep process were observed by transmission electron microscope. A unified macroscopic and microscopic constitutive model for predicting creep and age hardening of Al-Cu alloys under strain stress was established. The material constants are determined and the parameters in the model are obtained by particle swarm optimization algorithm. The invention solves the drawback that the prior method can only be used in a narrow stress range, has important guiding significance for accurately predicting creep deformation and property evolution under complex stress of practical materials and components, and can be applied to numerical simulation of component manufacturing.

The invention provides a cell fixation solution, detection kit and method for human respiratory tract pathogen infection flow cytometry detection. The cell fixation solution is a PBS solution containing formaldehyde with the volume fraction of 0.1-1% and methyl alcohol with the volume fraction of 60-80%, and the pH of the cell fixation solution is 7.2-7.4. The kit comprises the cell fixation solution, a cell permeating agent and at least one kind of monoclonal antibodies of a human respiratory tract pathogen to be detected, each kind of monoclonal antibodies of the human respiratory tract pathogen to be detected is marked with fluorescein, and different human respiratory tract pathogens to be detected are provided with different fluoresceins. The detection process is automatic, labor cost is saved, the result is objective and accurate, single-sample multiple detection can be achieved, and the pathogen infection condition can be better reflected.