Abstract: This article presents a closed-form variable-structure control strategy with dual avoidance regions design for collision-free waypoint navigation and trajectory tracking of car-like vehicles ...

Abstract: Due to model uncertainty, system coupling and external disturbance, the mathematical structure of control system is often constructed imprecisely. This unknown structure implies the unknown ...

A thick layer of more than 12 miles of rock may explain why Bermuda seems to float above the surrounding ocean. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

WASHINGTON, Dec 8 (Reuters) - Scientists have observed the largest-known rotating structure in the cosmos - a gargantuan thread-like assemblage of hundreds of galaxies, gas and dark matter that makes ...