Abstract: The disclosure belongs to the technical field of material science, and particularly relates to a method for preparing a high sensitivity temperature sensitive reversible color-changing microcapsule. According to the method, a series of novel fluorane dyes are designed and synthesized, the color-changing performance can be achieved without a color developing agent, the fluorane dyes are compounded with a phase change material according to a certain proportion, a series of two-component reversible temperature sensitive color-changing dyes are prepared, and then a two-component reversible thermochromic microcapsule with good color performance and color-changing response performance is prepared by adopting a solvent evaporation method. The two-component reversible thermochromic microcapsule provided by the disclosure can effectively alleviate the color lag phenomenon of a traditional three-component thermochromic capsule.

Abstract: There is disclosed a method and system for classifying road surface conditions. In an aspect, the method comprises: acquiring a digital image of a road surface at a given location and time; processing the acquired digital image to generate one or more feature vectors for classifying winter road surface conditions; acquiring values for auxiliary data to create feature vectors that enhance classification of the winter road surface conditions; and based on a comparison of the feature vectors to models in a classification knowledge database, classifying the road surface condition at the given location and time of the acquired digital image. In an embodiment, the method further comprises collecting classified road surface condition information acquired from a plurality of vehicles travelling over one or more roads; and mapping the classified winter road surface conditions for the one or more roads on a graphical display of a geographic region.