A method of operating a vehicle hybrid drive-train in which, depending on the operating situation, the engine and electric machine either operate individually or together. A target function is formed by comparing a desired temperature gradient with an actual temperature gradient. The disclosed invention allows for evaluation of the field resistance of a rice plant to rice blast using a DNA marker, thereby allowing for a resistant variety to be conveniently and accurately selected. Real-time data analysis is performed to detect and to recognize vehicle occupants, and recognize impending eccentric events. The light-emitting array includes a plurality of light-emitting diodes. 0\xd710\u22124 to 5 gcm3 and a thickness of 0.