An analytical approach is presented to investigate the of chip shape-dependent bit error rate (BER) performance of direct sequence optical code division multiple access with cascaded erbium doped fiber amplifiers in presence of fiber optic group velocity dispersion and self phase modulation. In our analysis, super-Gaussian and Hyperbolic-Secant shaped optical orthogonal codes are employed as ad...

Introduction Arterial spin labeling is sensitive to contamination due to off-resonance effects of the RF label. While it has been argued that in PASL these effects are small compared to pulse profile effects [1], this assessment has to be re-evaluated in view of the advent of highly selective gradient-modulated adiabatic pulses such as FOCI [2], requiring several times more RF energy than the c...

PURPOSE To evaluate the error in T1 estimates using inversion-recovery-based T1 mapping due to imperfect inversion and to perform a systematic study of adiabatic inversion pulse designs in order to maximize inversion efficiency for values of transverse relaxation (T2) in the myocardium subject to a peak power constraint. METHODS The inversion factor for hyperbolic secant and tangent/hyperboli...

There are many linear rank tests for the two-sample dispersion problem presented in literature. However just a few of them, the simplest ones, are commonly used. These common tests are not efficient for many practical distributions and thus other simple tests need to be developed to serve a wider range of distributions. The generalized secant hyperbolic distribution, proposed by Vaughan in [9],...

Motivated by the recent work on symmetric domains, this article investigates certain features of domain which are caused secant hyperbolic functions. Geometric characteristics analytic functions associated with discussed, include inclusion results, structural formula, sharp radii results such as radius starlikeness and convexity order α. It also finds a for ratios Euler numbers.

This work presents a control strategy using a network with radial basis function (RBF network) with adaptation in dual mode. The objective of the strategy is to use the approximate capacity of the RBF network to control nonlinear systems with unknown parameters or with uncertainties. The proposed control uses the structure of Model Reference Adaptive Control (MRAC) and a RBF network whose param...

The ground-state electron density of a polaron bound to Coulomb potential in homogeneous magnetic field—the transverse coordinates integrated out—converges pointwise and weakly the strong field limit square hyperbolic secant function.

In this study, we define a generalized hyperbolic secant distribution. Poor fit to heavy tailed data sets is repeatedly obtained by existing three-parameter distributions. Only three parameters are considered in the proposed new distribution and it fits left- right-tailed better than various We study some properties of distribution, namely, mode, skewness, kurtosis, hazard function, moments, me...

The shape of a probability distribution is often summarized by the distribution’s skewness and kurtosis. Starting from a symmetric ”parent” density f on the real line, we can modify its shape (i.e. introduce skewness and in-/decrease kurtosis) if f is appropriately weighted. In particular, every density w on the interval (0, 1) is a specific weighting function. Within this work, we follow up a ...