STUDENTS of ordinary endowment form the habit of observing things before words. The author of this work has therefore wisely begun with the notions of velocity and gradient of a curve before ...

Abstract: Due to the high labor cost of physicians, it is difficult to collect a rich amount of manually-labeled medical images for developing learning-based computer-aided diagnosis (CADx) systems or ...

This letter proposes a quaternion projection gradient ascent (QPGA) iterative algorithm based on generalized HR calculus for computing the principal eigenvalues and its eigenvectors of quaternion ...