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This invention relates to the field of spectroscopic detection technology, specifically disclosing a method and system for determining the composition of titanium alloys based on a spectrometer. The method includes: acquiring raw spectral data of a titanium alloy sample using a spectrometer, filtering high-frequency noise from the raw spectral data to obtain clean spectral data; detecting local minima in the clean spectral data to construct a baseline profile of the titanium alloy sample, and performing drift calibration on the baseline profile to obtain optimized spectral data; comparing the characteristic wavelength heights of adjacent elements and integrating the obtained peak data into characteristic spectral peaks; performing similarity matching between the characteristic spectral peaks and wavelengths in a preset element characteristic wavelength library to determine the intensity of the characteristic peaks; extracting element concentration data and correlating the element concentration data with the intensity of the characteristic peaks to construct a calibration curve; mapping the optimized spectral data to the calibration curve to generate composition ratio data. This invention can improve the efficiency of spectrometer-based titanium alloy composition determination.

The utility model provides a bidirectional solid state circuit breaker module comprising a first sub-module and a second sub-module, the first sub-module comprises a first part, and the second sub-module comprises a second part. At least the first part of the first sub-module and at least the second part of the second sub-module have the same configuration and are symmetrically arranged relative to each other. Each of the first part and the second part comprises a substrate and at least two power semiconductors and at least one energy absorption element which are arranged on the substrate, and the at least one energy absorption element is arranged in the middle of the substrate; the at least two power semiconductors are arranged around the at least one energy absorbing element.

This invention discloses a three-dimensional visualization display method, system, and related equipment for health evaluation of concrete structure contact joints. This solution is based on the spatial positioning information of the detection equipment and simultaneously displays the detection results with labels. Furthermore, it is integrated with the engineering model to achieve three-dimensional visualization for health evaluation of concrete structure contact joints, thereby effectively overcoming the problems existing in the prior art.

A process for the methacrylation of dECM comprises placing a carbonate buffer at a concentration of 1 M into a reaction vessel and heating to a temperature of 50 DEG C, adding dECM to the carbonate buffer to obtain a dECM solution at a concentration of 4% (w / v), sterilizing the solution by irradiation with radiant ultraviolet rays for 15 minutes, adding methacrylic anhydride in an amount of 0.5 mL / 1 g of dECM and reacting at 50 DEG C for 1 hour, and then removing the dECM from the reaction vessel. Then adding a phosphate buffer salt solution to obtain a diluent which is 5 times of the mixture, putting the obtained solution into a dialysis tube, then putting the dialysis tube into deionized water, carrying out the stage at 40 DEG C for not more than 4 days, after the stage is completed, transferring the solution in the dialysis tube into an aluminum plate, and then standing at-80 DEG C for at least 3 hours, and then freeze-drying the frozen solution under the following conditions: the shelf temperature is 10 DEG C, the pressure is 0.1 mba, and the freeze-drying time is 48 hours. The invention also relates to the methacrylated dECM obtained by the above process, and to the use of the methacrylated dECM obtained by the above process in a bioprinting process.