This tutorial walks through the basic structure and shading needed to draw realistic eyes. It explains how reference, line ...

Abstract: Digital heart sound auscultation technology is crucial for the early diagnosis of coronary heart disease, and the optimal structural design and parameter optimization of high-performance ...

Ask the publishers to restore access to 500,000+ books. An icon used to represent a menu that can be toggled by interacting with this icon. A line drawing of the Internet Archive headquarters building ...