205 results about "Conventional analysis" patented technology

A method and system for analysis of fluorescence emission spectroscopy data and fluorescence lifetime imaging microscopy data are described. A unique Laguerre expansion can be found for fluorescence intensity decays of arbitrary form with convergence to a correct solution faster than with conventional methods. The Laguerre expansion technique includes expansion coefficients highly correlated with intrinsic fluorescence lifetimes, allowing direct characterization of fluorescence dynamics. For complex systems, conventional analysis of fluorescence intensity decay in terms of discrete exponential components can not readily provide a true representation of underlying fluorescence dynamics. Utilizing the Laguerre expansion technique, an alternative non-parametric method for analysis of time-resolved fluorescence data from various systems is described, facilitating characterization and discrimination of a sample. An ultra-fast method for analysis of fluorescence lifetime imaging is also described, facilitating real-time analysis of compositional and functional changes in samples, at a microscopic or macroscopic level.

The invention relates to a direct sample introduction type method and a direct sample introduction type instrument for simultaneously measuring mercury and cadmium, which do not need to digest a sample. The direct sample introduction type method for simultaneously measuring mercury and cadmium comprises the steps of heating a sample in an aerobic environment, controlling the temperature in the scope from 120 DEG C to 500 DEG C, and separating most Hg and a decomposer out from the sample; loading Hg (mercury) and the decomposer into a catalytic furnace by an air flow to be further decomposed, absorbing Hg with Au, and keeping Cd (cadmium) be in the sample; putting the processed sample into a cracking furnace to be further thermally decomposed, and vaporizing Cd and residual H in the sample at a high temperature; loading the vaporized Cd and residual Hg into a Cd atom trap by argon, selectively trapping the Cd by a tungsten filament, and absorbing the residual Hg by a Hg trap; and heating the tungsten filament or a molybdenum filament and gold amalgamation in the argon and hydrogen gas to release Cd and Hg, and carrying Cd and Hg into an atomic fluorescence spectrometer by the argon and the hydrogen. On the basis of realizing the function of simultaneously measuring Hg and Cd, the direct sample introduction type method and direct sample introduction type instrument for simultaneously measuring mercury and cadmium have the advantages that the structure of the entire measurement instrument is simplified so as to miniaturize the instrument, so that the instrument can conveniently meet the requirements of the conventional analysis and emergencies, and can be carried to the field by a vehicle. Moreover, the direct sample introduction type method and the direct sample introduction type instrument for simultaneously measuring mercury and cadmium have application prospect in the field detection.

The invention discloses an integrated design-oriented urban rail transit station sorting method. The method comprises the following steps of: (1) acquiring original data and establishing a station initial variable information database A; (2) configuring parameters, calculating indexes, and generating a station impact factor relational database B; (3) standardizing and preprocessing data in a dimensionless mode; (4) extracting a main constituent D-characteristic index; (5) clustering urban rail transit stations; and (6) analyzing a result and storing the stations for sorting. By the method, a user can automatically adjust acquired initial variable content in a certain standard frame, the main constituent D-characteristic index of the stations can be automatically extracted by a statistic package for social science (SPSS) statement, the clustering is performed so as to acquire a data class, and the defects such as qualitative general acquisition and sorting, incomplete acquired variable content, single analysis result, low automation degree and the like in the conventional analysis are overcome; therefore, the method has high universality, both the efficiency and the quality of the method are improved, and technical support can be provided for design of urban rail transit such as integrated design of the urban rail transit stations and the like.

The invention discloses a method for rapidly measuring chemical compositions of wood by utilizing a near infrared spectroscopic analysis technique, and the method can be used for solving the problems of high cost and long period when the existing method is used for analyzing and measuring the chemical compositions of the wood, has the advantages of simplicity, convenience, practicability, rapidness and the like, and can be used for effectively, rapidly and accurately analyzing and measuring the chemical compositions of the wood and the like. The method disclosed by the invention comprises the following steps: a. crushing wood chips and sieving through a sieve of 40-60 meshes; b. measuring the chemical compositions of the wood by utilizing a conventional analysis method; c. collecting the near infrared spectroscopic data of a wood sample by utilizing a near infrared spectroscopic analysis instrument; d. respectively establishing corresponding wood teaching prediction models of various chemical composition measured values of the wood and the near infrared spectroscopic data of the wood by adopting a chemical metering method; and e. analyzing the wood near infrared spectroscopic data of the unknown chemical compositions which are collected according to the step c by adopting the established mathematical prediction model, thereby rapidly and accurately determining the chemical compositions of the wood.

The present invention relates to application of catalysts for the Selective Catalytic Reduction of oxides of Nitrogen using N-containing reductant. The catalysts are characterized as phase pure lattice oxide materials into which catalytically active cations are incorporated at high levels of dispersion such that conventional analysis reveals a highly phase pure material. The materials are further characterized by high activity, hydrothermal durability and poison tolerance in the intended application.

The invention discloses a method for separating the influences of fatigue damage and a thixotropic factor on an asphalt modulus, which relates to a testing method for the asphalt modulus and is used for solving the problem of limitation on the conventional analysis of the asphalt fatigue characteristic under the action of cyclic load with a damage theory. The method comprises the following steps of: drawing a standard relation curve of an asphalt dynamic modulus and a phase angle, testing relation curves of the dynamic modulus and the phase angle under different initial strain conditions, finding a turning point which is deviated from a linear section on each curve, finding a dividing point between a thixotropy influence area and a damage influence area, and fitting curve parts in front of the dividing point to obtain the values of k, alpha and beta; and fitting the dynamic modulus of asphalt to obtain a value D, and separating the dynamic modulus of the asphalt into two parts, i.e., a modulus under the influence of thixotropy and the reduction value of the modulus caused by damage. The method is used for researching the fatigue characteristic of asphalt.

The present invention belongs to the field of physical property measurement and analysis of material, and relates to the grain size calculation for various inclusions in metal material. The in-situ counting and analysis of inclusions in metal material includes the following steps: conventional analysis to obtain relevant data of the grain size distribution of various inclusions in the sample via metal structure detection, chemical phase state analysis, and electronic microscope plus energy spectrum analysis; in-situ statistical analysis with in-situ metal analyzer for continuous scanning of the sample to obtain single spark spectrum strength data corresponding to the original position of the sample; system analysis to obtain single spark spectrum strength data and determine signal threshold; establishing mathematic analysis mode and comparing the data obtained in different methods to obtain the grain size distribution information of various kinds of inclusions and output result.

The invention provides a simple and convenient method and a simple and convenient system for evaluating hemodynamic indexes and characteristic parameters of a blood signal of a carotid arterial system through non-invasive detection on blood pressure of brachial arteries and an axial blood velocity signal of a common carotid artery. The method comprises the following steps: detecting the waveform and a numerical value of an axial blood velocity of the common carotid artery by using a continuous Doppler blood velocity waveform detecting module, detecting diastolic pressure and systolic pressure of a human body by using an arm-type electronic blood pressure detecting module, and then calculating hemodynamic parameters of the carotid arterial system by a simplified method; and selecting Morlet mother wavelet for wavelet analysis on the waveform of the blood velocity of the common carotid artery, and calculating the characteristic parameters of the blood signal. The method is an analysis method which combines the hemodynamic principle and wavelet transformation; compared with the method adopted by the conventional cerebral hemodynamic analysis device, the signal acquisition and analysis method is simpler; and to a great extent, the defects that the conventional analysis device is complicated in structure, huge in volume, complex in operation, high in price and the like are overcome.

The invention provides a test method of the sulphate content in a flue gas desulfurization system, relating to the technical field of a test method of the sulphate content in a desulphurization system. The test method is characterized in that two samples to be tested are taken simultaneously, wherein one sample is used for determining the sulphite content, and the other sample is used for determining the total content of the sulphite and sulphate; and the sulphate content is calculated by the difference between the total content of the sulphite and sulphate and the sulphite content. The test method has the positive effects that the method is accurate, thus greatly improving the accuracy and the reliability of analysis results of the sulphate in the desulphurization system, and providing reliable analysis results for the operation of the desulphurization system. As the sulphite content in the desulphurization system is an indispensable project to be tested in the conventional analysis, thus not increasing the workload when determining the sulphate content. As the test can be completed only by using an analytical instrument in a conventional laboratory, and a determining project and a determining instrument do not need to be increased, the test method is a very practical analysis method.

The invention discloses a method for modeling a relationship between chemical wood pulp cellulose characteristics and paper sheet tensile strength. The method is characterized in that wood pulp cellulose, which is prepared according to a chemical method, is taken as a model sample; the wood pulp cellulose comprises softwood pulp and hardwood pulp; 12 types of fibers with different morphological parameters are obtained by means of performing defibering and PFI defibrination on different types of wood-pulp boards; for a paper sheet in the model, a tensile strength is assumed as T, an Elongation is assumed as s, and a fiber crimp index is assumed as Cw, then a paper sheet tensile strength model expression is T=m*Cw*S, wherein a, m and n are constant numbers. According to the method for modeling the relationship between the chemical wood pulp cellulose characteristics and the paper sheet tensile strength, all parameters in the paper sheet tensile strength model are fiber characteristic parameters, and can be obtained through conventional analysis and test methods.