34results about How to "Realize quantitative identification" patented technology

The invention discloses a humidity-controllable semiconductor gas-sensitive element testing method including a SnO2 gas-sensitive material preparation step, belongs to the field of element testing andaims at solving the problem that an existing formaldehyde gas-sensitive element testing method is incomplete and the problem of low humidity control precision. The humidity-controllable semiconductorgas-sensitive element testing method is technically characterized by including the SnO2 gas-sensitive material preparation step, a semiconductor gas sensor testing system establishment and testing step and a semiconductor gas sensor testing system and semiconductor gas-sensitive element performance analysis step. By adopting the method, formaldehyde gas-sensitive element testing is more perfect and the humidity controllability and control precision are improved.

The invention provides a preparation and detection method of a mercury ion electrochemical biosensor. The electrochemical biosensor comprises a double-electron mediator, an electrode modifier and a functional substance, wherein the double-electron mediator is an Fc-Ru < 3 + > mediator, the electrode modifier is catechol and chitosan, and the functional substance is thymine. The electrochemical sensor can specifically recognize mercury ions, can be applied to mercury ion detection in water environment protection and wastewater treatment, and has the advantages of high sensitivity, good selectivity, low cost, simplicity in operation, convenience in carrying, short analysis time and the like.

The invention mainly relates to a semiconductor gas sensor test system, belongs to the field of element testing and is used for solving the problem that an existing semiconductor gas sensitive element testing method is incomplete. The semiconductor gas sensor testing system is characterized by being used for dynamically distributing gas for different gases under given concentration and enabling a multi-branch sensor array to monitor change of conductivity on the surfaces of gas sensitive elements in real time when gases are introduced.

The invention relates to a method for evaluating the overall health degree of an information system based on big data analysis, belonging to the information technology field. The method comprises thefollowing steps: step S11, acquiring state indexes and performance indexes of various resources in the information system, calculating resource state index scores, resource performance index scores and overall usability index scores of the information system, wherein the overall usability index score of information system is based on the resource status index score; S12, calculating the overall health degree of the information system based on the resource state index score, the resource performance index score and the overall availability index score of the information system. The invention solves the problem that the information system in the prior art has no overall health degree analysis and research and judgment, realizes real-time tracking of the overall health degree of the information system, realizes automatic early warning and research and judgment of the information system by means of the quantitative health degree index before the system performance is lowered and the faultoccurs, and ensures the safety, stability and efficient operation of the information system itself.

The present invention provides an abnormal transaction detection method and device based on transaction rule identification, wherein the method includes: acquiring transaction detail data of the transaction to be detected, generating a time series to be detected; Quantitative identification model of historical law, obtain the evaluation value of historical law quantitative elements and historical time series corresponding to the transaction to be detected; determine the average amount of information of the time series to be detected according to the time series to be detected and the evaluation value of quantitative elements of historical law; according to the time series to be detected The correlation coefficient value between the sequence and the historical time series, the transaction data variation coefficient value, the average amount of information, the proportion of business units that determine each abnormal situation under the transaction to be detected, and the overall abnormality score of the transaction to be detected. The above technical solution realizes the quantitative identification of various types of abnormal transactions, improves the accuracy and efficiency of abnormal transaction detection, and ensures the reliability and effectiveness of the system.

The invention discloses a Duffing equation Lyapunov index based ultrasonic guided wave detection method. The method comprises the following steps: 1, calculating to obtain the change Lyapunov index of a Duffing oscillator signal detection system with the driving force F; 2, inputting a Hanning window modulated ultrasonic guided wave signal to the Duffing oscillator signal detection system, and calculating to obtain the Lyapunov index of the Duffing oscillator signal detection system with the driving force F after the input of the ultrasonic guided wave signal; 3, selecting the driving force F corresponded by a largest absolute value of a difference between two L1 vales in the area having a product of the L1 value before the input of the ultrasonic guided wave signal and the L1 value after the input of the ultrasonic guided wave signal as the driving force of the Duffing oscillator signal detection system; 4, exciting the ultrasonic guided wave signal on a detected object, and obtaining a receiving signal through a receiver; and 5, inputting the receiving signal to the driving force selected Duffing oscillator signal detection system, determining the detected object is intact if L1 is greater than 0, and determining the detected object contains a defect if L1 is lower than 0.

The invention relates to a colloidal gold detecting method based on digital image processing, comprising the following steps of: collecting RGB (Red, Green, Blue) coloured images by an area array CCD (Charge Coupled Device) detector, carrying out gray level conversion, edge extraction, background suppression and the like on the collected coloured images, and finally quantitatively calculating thecorresponding concentration result of a sample. The invention also relates to a colloidal gold detecting device based on the digital image processing; and the device can be used for detecting the colloidal gold by the method provided by the invention so that the device not only realizes the negative and positive qualitative judgement of the sample but also realizes the quantitative application onthe lower end.

The invention discloses a method for quantitative identification of satellite micro-vibration sources based on blind source separation technology. First, each vibration source of the satellite cabin section structure model operates normally, and the vibration response signals at the sensitive loads and different positions on the model surface are obtained to ensure The number of observed signals is greater than the number of sources; then, use the high-order cumulant to construct the reference kurtosis comparison function of the blind source separation algorithm, construct the reference signal according to the prior knowledge of the vibration source, and use the optimal step size gradient method to find the reference kurtosis comparison function The optimal solution of the separation signal corresponding to the maximization of the function realizes the extraction of the single vibration source signal; secondly, the response of each vibration source at the sensitive load point is obtained through the Wiener filter; finally, the contribution based on the vector projection Quantity characterization method is used to calculate the contribution of each micro-vibration source. The contribution index reflects the relative proportion of each vibration source's contribution and influence on the vibration of sensitive load points, and provides the basis and basis for vibration suppression.