Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

92results about How to "Accessible" patented technology

Voltage transformer error prediction method based on transfer entropy and wavelet neural network

The invention discloses a voltage transformer error prediction method based on transfer entropy and a wavelet neural network. The method comprises the following steps: acquiring environmental parameters, electrical parameters and error data of operation of an electronic voltage transformer; through a transfer entropy theory, calculating transfer entropy values of environmental parameters and electrical parameters on error data, selecting main influence quantities according to entropy values and positive and negative values, calculating transfer entropy values of contrast differences and angular differences of five influence factors in the environmental parameters and the electrical parameters respectively, and screening the influence factors with strong correlation; and normalizing the influence factors obtained by screening to enable the data to be in an order of magnitude, taking the processed data as an input quantity, and respectively establishing a ratio difference prediction model and an angular difference prediction model through a wavelet neural network; and calculating an error between the prediction curve and the expected curve, and representing the precision of the errorprediction method by an average absolute error. According to the invention, errors of the electronic voltage transformer under different voltage levels can be predicted, and the method has good adaptability.
Owner:CHINA THREE GORGES UNIV

Alkadiene selective hydrogenation catalyst as well as preparation method and application thereof

The invention provides an alkadiene selective hydrogenation catalyst and a preparation method thereof. The carrier of the catalyst adopts carboxyl-functionalized step hole FZIF-8; active components adopts palladium; the active component palladium accounts for 0.1 to 10 percent on the basis of the total weight of the carrier of the catalyst. The invention further provides the preparation method of the alkadiene selective hydrogenation catalyst. A step hole structure is formed in the carrier of the alkadiene selective hydrogenation catalyst, so that carboxyl groups have accessibility, and the active components and the carboxyl groups can interact mutually; the carboxyl groups are contained in the carrier of the catalyst, can anchor the active components, realize high dispersion of the active components, meanwhile prevent agglomeration and drain of the active components during the process, and ensure that the catalyst is high in activity. The catalyst can be applied to the hydrogenation upgrading of FCC petrol, removal of alkadiene in the petrol, and is mild in reaction condition, low in reaction temperature and pressure, and good in selective hydrogenation effect of products.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Nanofiber spherical silicon-based heterogeneous Fenton catalyst as well as synthetic method and application thereof

The invention discloses a nanofiber spherical silicon-based heterogeneous Fenton catalyst as well as a synthetic method and application thereof. The synthetic method is characterized by comprising thefollowing steps: adding TEOS (Tetraethyl Orthosilicate) into a mixed solution composed of n-amyl alcohol and cyclohexane to form a solution A; dissolving urea and CPBH into deionized water to form asolution B; mixing the solution A and the solution B, dropwise dripping a Cu(NO3)2 / 3H2O solution, stirring in a water bath to form a solution C, and carrying out a hydrothermal reaction in a drying oven at the temperature of 120-140 DEG C for 5-7 hours; filtering the obtained solid product, alternatively washing with deionized water and acetone, and drying; and calcining in a muffle furnace, and cooling, thereby obtaining the heterogeneous Fenton catalyst in the invention. According to the nanofiber spherical silicon-based heterogeneous Fenton catalyst disclosed by the invention, a harsh condition that the pH value of the system is regulated to 2-3 is not needed in the reaction process, and the catalyst has an excellent removal effect on degradation of non-biodegradable organic pollutantsunder neutral room temperature conditions.
Owner:GUANGZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products