In previous works, a learning law with a dead zone function was developed for multilayer differential neural networks. This scheme requires strictly a priori knowledge of an upper bound for the unmodeled dynamics. In this paper, the learning law is modified in such a way that this condition is relaxed. By this modification, the tuning process is simpler and the dead-zone function is not require...

The final masses of Jovian planets are attained when the tidal torques that they exert on their surrounding protostellar disks are sufficient to open gaps in the face of disk viscosity, thereby shutting off any further accretion. In sufficiently well-ionized disks, the predominant form of disk viscosity originates from the Magneto-Rotational Instability (MRI) that drives hydromagnetic disk turb...

This paper proposes a nonuniform dead-zone quantizer for quantization of the speech signal, modeled with the Laplacian probability density function. It is consisted of the inner dead-zone part and the outer nonuniform Lloyd-Max’s part. The numerical results provided in the paper show that, for the fixed value of source entropy, the proposed quantizer provides the gain in the quality of the quan...

A position control scheme for an ultrasonic motor using an adaptive controller with dead-zone compensation is presented in this paper. In the proposed controller, the adaptive control scheme compensates the time-varying characteristic of the motor with online parameter identification. In order to overcome the effect of a dead-zone, a P controller is adopted. The effectiveness of the proposed co...