3 results about "Mathematical formula" patented technology

The invention discloses a method and device for evaluating the urea crystallization risk based on a steady-state working condition. According to the method for evaluating the urea crystallization risk based on the steady-state working condition, a urea crystallization risk coefficient eta is evaluated through three coefficients, including a quality coefficient eta m, a temperature coefficient eta t and an efficiency coefficient eta e. The urea crystallization risk coefficient is obtained through comprehensive calculation from the three aspects of quality, temperature and structure, the crystallization risk is quantified through a mathematical method, the urea crystallization threshold value can be obtained through calibration, the urea decomposition detailed mechanism is fused into the model, the chemical reaction path is expressed in the form of a mathematical equation, the influence of an SCR mixer on crystallization is quantified from the angle of SCR conversion efficiency, the urea crystallization risk coefficient is not a fixed formula and can be calibrated according to a bench steady-state test, and the method is deduced based on a urea crystallization basic principle and a mathematical formula and is high in reliability.

Disclosed herein is a photo-alignment polymer, which can be preferably applied to an alignment layer or the like of a three-dimensional display device because its alignment direction is easily changed depending on the polarization direction, and an alignment layer and liquid crystal retardation film including the same. The photo-alignment layer includes a cyclic olefin repeating unit substituted with one or more photoreactive groups, and has an absorbance ratio of 0.02 or more, the absorbance ratio being defined by Mathematical Formula 1 above, when the photo-alignment polymer is exposed to first polarized UV radiation having a wavelength of 280 to 315 nm and a first polarization direction at an exposure intensity of 60 mJ/cm² or less to conduct first photo-alignment and is then exposed to second polarized UV radiation having a wavelength of 280 to 315 nm and a second polarization direction changed by 90° from the first polarization direction at an exposure intensity of 60 mJ/cm² or less to conduct second photo-alignment.