Abstract: This article is concerned with the high-performance control problem for the nonlinear systems in the sense of not only fast accurate reference tracking but ...

A burning sensation in your upper back can happen due to muscle strain from lifting or exercise, stress-related muscle tension, spinal misalignment, herniated discs that compress nerves, or ...

Gold is holding near key support at $4,650 after failing to break higher, with traders waiting for a breakout. A move above $4,800 could restart the bullish trend, while a drop below $4,650 may send ...