Abstract: A method includes: acquiring road data collected by a sensor, the road data including a first lane line, the first lane line including first datum points; acquiring a map corresponding to the road data, the map including a second lane line, the second lane line including second datum points; generating a road feature of a road corresponding to the road data based on the first lane line, the second lane line, and a projection relationship between the road data and the map; and inputting the road feature to a road detection model to obtain a result indicating whether the road has changed.

Abstract: Disclosed are an external preparation of imidacloprid, a preparation method and use thereof, which relates to the technical field of veterinary drugs. The present disclosure uses alcohol solvent as the dispersion medium of imidacloprid technical, which can ensure the stability of imidacloprid technical; The present disclosure uses one or more of dibutyl hydroxytoluene, hydroxymethyl, propyl hydroxybenzoate and butylated hydroxyanisole as the antioxidant, which can effectively prevent the oxidation of imidacloprid technical and prolong the preservation time of external preparations of imidacloprid; The present disclosure uses one or more of propylene carbonate, povidone and copovidone as the stabilizer, which can reduce the volatility of the solvent and maintain the stability of the dispersion system. At the same time, the adjuvants used in the present disclosure have the advantages of safety, no skin irritation, low cost, and are suitable for market promotion and application.