4results about How to "Meet actual testing needs" patented technology

The invention discloses a method and system for testing the capacitance value of an integrated capacitor, and relates to the field of electrical measurement, and the method comprises the steps: obtaining the rated information of a to-be-tested integrated capacitor, and generating a control parameter based on the rated information; iteratively calculating the capacitance value of each phase of the to-be-tested integrated capacitor based on a preset adaptive optimization algorithm and the control parameters; and obtaining a target capacitance value of each phase until a preset convergence condition is met, and completing the test. In each iteration process, acquiring a three-phase voltage signal and a three-phase current signal of the to-be-tested integrated capacitor based on the current control parameter; performing feature extraction on the three-phase voltage signal and the three-phase current signal to obtain spectrum feature information; constructing a coupling matrix of the to-be-tested integrated capacitor based on the spectrum feature information, and separately calculating an independent capacitance value of each phase based on the coupling matrix and a coupling residual error to obtain a first calculation result; and optimizing the control parameters based on the first calculation result to obtain the control parameters of the next iteration process.

The application discloses Eu@MOF-808-His composite film and a preparation method and tryptophan enantiomer detection application thereof. The method is characterized in that the MOF-808-His chiral material is prepared through a post-synthetic ligand exchange method, Eu ions are loaded on the MOF-808-His chiral material to obtain Eu@MOF-808-His luminescent powder, and finally, the Eu@MOF-808-His luminescent powder is compounded with PDMS to prepare the composite film. 3+ The application is characterized in that a fixed concentration-time gradient fluorescence quenching detection method is first created, the time-dependent amplification of chiral resolution of dynamic quenching is utilized, the Stern-Volmer quenching constant ratio of L / D-tryptophan in a 30% ethanol-water system can reach 1.9364, and the Stern-Volmer quenching constant ratio is significantly higher than that of existing powder-state materials. The composite film has a simple preparation process, and the excellent crystal structure stability and good micro-dispersed morphology of the composite film are verified through XRD and SEM characterization. The material has a rapid fluorescence response, the time-dependent amplification of chiral resolution of dynamic quenching is utilized, the Stem-Volmer quenching constant ratio of L / D-tryptophan in a 3% ethanol-water system can reach 1.9364, and the Stern-Volmer quencing constant ratio is significantly higher than that of existing powder-state materials. The composite film solves the problems of poor dispersibility and difficult recycling of traditional powder materials, and can realize rapid and accurate detection of tryptophan enantiomers.

The application discloses a kind of quick detection methods for the chloride ion permeability of slag-based alkali-activated concrete, comprising: preparing slag-based alkali-activated concrete test piece, and pretreating slag-based alkali-activated concrete test piece;The test piece is contacted with electrolyte, and the test piece is tested according to the set test voltage and test duration Chloride ion electromigration test;After testing, the chloride ion penetration depth is measured, and the chloride ion migration coefficient initial value is calculated;The chloride ion migration coefficient initial value is corrected to obtain the chloride ion migration coefficient correction value;According to the chloride ion migration coefficient correction value, the chloride ion permeability of slag-based alkali-activated concrete is evaluated.The application can adapt to the performance characteristics of slag-based alkali-activated concrete, and the detection efficiency is high and the detection accuracy is high.