Inhomogeneous Gain Saturation in EDF: Experiment and Modeling

Peaking Attenuation in High-Gain Observers Using Adaptive Saturation: Application to a Ball and Wheel System

Despite providing robustness, high-gain observers impose a peaking phenomenon, which may cause instability, on the system states. In this paper, an adaptive saturation is proposed to attenuate the undesirable mentioned phenomenon in high-gain observers. A real-valued and differentiable sigmoid function is considered as the saturating element whose parameters (height and slope) are adaptively tu...

-Gain of Double Integrators With Saturation Nonlinearity

This note uses quadratic surface Lyapunov functions (SuLFs) to efficiently check if a double integrator in feedback with a saturation nonlinearity has L -gain less than > 0. We show that for many such systems, theL -gain is nonconservative in the sense that this is approximately equal to the lower bound obtained by replacing the saturation with a constant gain of 1. These results allow the use ...

Estimating Saturation Factors for PRESS with Inhomogeneous B1 at 7T

INTRODUCTION:PRESS [1] is commonly used for localization in single voxel and spectroscopic imaging applications [2], but is quite demanding of peak B1 field strength to produce the refocusing pulses with sufficient bandwidth to overcome chemical shift misregistration effects. At field strengths of 7 Tesla and above, difficulties emerge with achieving sufficiently high B1 field strengths in vivo...

Nonlinear Gain Saturation in Active Slow Light Photonic Crystal Waveguides

Modeling Inhomogeneous DNA Replication Kinetics

In eukaryotic organisms, DNA replication is initiated at a series of chromosomal locations called origins, where replication forks are assembled proceeding bidirectionally to replicate the genome. The distribution and firing rate of these origins, in conjunction with the velocity at which forks progress, dictate the program of the replication process. Previous attempts at modeling DNA replicati...