8results about How to "Rapid characterization" patented technology

This disclosure provides a nuclear magnetic resonance (NMR) analysis method for establishing the chemical composition and condensed-state structure of fluorine-containing materials and its application. The method includes: placing fluorine-containing materials under different operating conditions in a single-sided NMR spectrometer; under a single-sided inhomogeneous magnetic field environment; presetting parameters for a spin echo pulse sequence; using the spin echo pulse sequence to excite fluorine and hydrogen nuclei in the fluorine-containing material to obtain coupled NMR signals of fluorine and hydrogen nuclei; determining echo peak data from the coupled NMR signals according to the preset parameters; processing the echo peak data according to the structural characteristics of the fluorine-containing material to obtain relaxation spectrum fingerprint data; performing data transformation on the relaxation spectrum fingerprint data to obtain transverse relaxation time data; and establishing a relaxation spectrum fingerprint database and a transverse relaxation time database of the coupling of fluorine and hydrogen nuclei in the fluorine-containing material based on the relaxation spectrum fingerprint data and transverse relaxation time data under different operating conditions.

The invention belongs to the technical field of material microstructure state test characterization, and particularly provides a material microstructure quantitative characterization method coupling image enhancement and machine learning, which comprises the following steps: obtaining an observation sample microstructure image set through a microscopic observation method; carrying out image enhancement, multiple noise reduction and binarization processing on the microstructure image set; extracting features of the binarized image to a high-dimensional hidden space by using a deep convolutional neural network algorithm, and then performing dimension reduction and quantitative characterization on the high-dimensional features by using a consistent manifold algorithm; and carrying out physical interpretability analysis on the dimension reduction result of the microstructure characteristics of the material, and evaluating the characterization effect of the dimension reduction quantitative index on the microstructure characteristics of the material. According to the method, unified description and quantitative characterization of various complex microstructure morphology, size and evolution of the material are achieved, the cost and errors of a manual statistical method are greatly reduced, and the method has high invention innovation and good engineering application prospects.

The invention relates to the technical field of material detection, in particular to a rapid characterization method of an OCA light curing rate. According to the rapid characterization method for the light curing rate of the OCA, the light curing rate of the OCA can be dynamically monitored by testing the content and the change rate of the photoinitiator 651, the free radical quenching product benzophenone and the methyl benzoate in an OCA system and combining the conversion rate of monomers; in addition, a photocuring end point can be further obtained, and the optimal curing time is obtained. According to the method, by monitoring byproducts generated by free radical self-quenching, rapid and high-sensitivity characterization of the whole curing reaction process can be achieved, and the method does not need to use an organic solvent and is safe and environmentally friendly.

This invention provides a method for studying the effect of oxygen content on the microstructure and properties of nickel-based superalloys, comprising the following steps: S1, placing high-oxygen nickel-based recycled alloy powder into the first channel of a feeding hopper, and low-oxygen nickel-based alloy powder into the second channel of the feeding hopper; S2, activating the first feeding tray of the first channel and the second feeding tray of the second channel for continuous feeding, obtaining a layer-by-layer stacked mixed printing powder; S3, simultaneously activating the printing equipment to print layer by layer, obtaining a nickel-based superalloy sample with a gradient change in oxygen content; wherein, as the number of layers increases, the mass percentage of high-oxygen nickel-based recycled alloy powder gradually increases from 0% to 100%, and the mass percentage of low-oxygen nickel-based alloy powder gradually decreases from 100% to 0%. The gradient material with continuously changing oxygen content prepared by the method of this invention can provide prototype materials for high-throughput rapid characterization of the effect of oxygen content on the microstructure and properties of nickel-based superalloys.

The invention relates to the technical field of radiance image generation, in particular to a high-altitude plume radiance image rapid generation method. Comprising the following steps: collecting a plurality of sample data, and establishing a core radiance mapping relation among flight speed, flight height and core radiance; wherein each piece of sample data comprises a flight height, a flight speed and radiation brightness distribution; determining the core radiation brightness of the target through a linear difference method according to the core brightness mapping relation and the position of the target; wherein the position of the target comprises the current flight height and the flight speed; selecting the sample data, the position of which is closest to the position of the target, from the multiple pieces of sample data, and marking the sample data as target data; normalizing the target data to obtain a change rule of radiation brightness distribution; and obtaining radiation brightness distribution of the target according to the change rule and the core radiation brightness of the target. The invention provides a method for quickly generating a high-altitude plume radiance image, which can quickly obtain infrared radiance.

The invention belongs to the technical field of engines, and particularly relates to a diesel engine in-cylinder heat release curve real-time reconstruction method based on injection parameter variation, which comprises the following steps of: extracting diesel engine structure, control and operation parameters from a steady-state engine characteristic database, determining a typical load working condition and obtaining a reference combustion heat release rate curve; the circulating air inflow is calculated based on the rotating speed of the diesel engine and the pressure of an air inlet main pipe, the in-cylinder excess air coefficient is calculated according to the current circulating air inflow and the oil injection amount, the injection duration and the combustion duration are calculated in combination with the rotating speed of the diesel engine, the injection pressure, the circulating oil injection amount and the excess air coefficient, and the reference combustion heat release rate is further calculated. And phase translation is carried out on the reconstructed combustion heat release rate curve according to the main injection advance angle, and a target combustion heat release rate curve consistent with the main injection moment is obtained. The method is small in calculation amount and high in reconstruction speed, can adapt to the influence of injection parameter change on the combustion heat release characteristic under the transient working condition, and meets the application requirements of real-time analysis and vehicle-mounted control.

The invention provides a nuclear magnetic resonance analysis method for establishing a fluorine-containing material chemical component and a condensed state structure and application thereof.The method comprises the steps that fluorine-containing materials under different working conditions are placed in a unilateral nuclear magnetic resonance spectrometer, in a unilateral non-uniform magnetic field environment, parameters of a spin echo pulse sequence are preset, and the parameters of the spin echo pulse sequence are calculated; exciting a fluorine atomic nucleus and a hydrogen atomic nucleus in the fluorine-containing material by using the spin echo pulse sequence to obtain a coupled nuclear magnetic resonance signal of the fluorine atomic nucleus and the hydrogen atomic nucleus; determining echo peak point data from the coupled nuclear magnetic resonance signals according to preset parameters; performing data processing on the echo peak point data according to the structural characteristics of the fluorine-containing material to obtain relaxation spectrum fingerprint data; performing data transformation on the relaxation spectrum fingerprint data to obtain transverse relaxation time data; and based on the relaxation spectrum fingerprint data and the transverse relaxation time data under different working conditions, establishing a relaxation spectrum fingerprint database and a transverse relaxation time database with fluorine nuclei and hydrogen nuclei coupled in the fluorine-containing material.

The present application relates to the field of metal casting technology, and specifically to a method for testing the fluidity of inorganic sand for green casting, and accordingly provides a sand core structure and a sand core mold that match the method. Aiming at the fluidity characteristics of inorganic sand, the present application designs a slender, curved sand core structure that can correspond to the actual working conditions, and designs a corresponding sand core mold and a method for testing the fluidity of inorganic sand to match the sand core structure. The method prepares a number of sand core samples with specific structures, and assesses the degree of filling of the mold cavity by the sand core samples to evaluate whether the sand core samples are qualified, calculates the pass rate based on this, and then characterizes the fluidity index of the inorganic sand based on the pass rate. The present application can accurately, stably and quickly detect and characterize the fluidity index of inorganic sand, solving the problem that the fluidity of inorganic sand cannot be characterized in the prior art.