A display system is disclosed, including data spectacles which have a spectacles frame and a display which is mounted at the spectacles frame such that it is situated in the field of vision of the wearer of the spectacles frame. The shift device includes a shift lever and a case. In the shear model, the prediction of slip is a function of walking speed, stride length and other anthropometric factors which affect gait, as well as the friction forces that develop at the shoe-floor interface. Oxygen is injected into the system to form and SiO2 passivation layer to improve the self aligned process. The uncorrected command basic fuel injection quantity Fbaseb at the next time is multiplied by coefficient KF, thereby to successively correct the next uncorrected command basic fuel injection quantity Fbaseb.