Bessel


Also found in: Dictionary, Thesaurus, Wikipedia.

Bessel

Friedrich Wilhelm . 1784--1846, German astronomer and mathematician. He made the first authenticated measurement of a star's distance (1841) and systematized a series of mathematical functions used in physics
References in periodicals archive ?
where [J.sub.m] and [H.sup.(l).sub.m] denote Bessel functions and Hankel functions of first kind of order m, respectively, while [k.sub.0] is the free-space wave number.
Li et al., "Beam wander relieved orbital angular momentum communication in turbulent atmosphere using Bessel beams," Scientific Reports, vol.
This conclusion can be inferred from (12) due to field dependence with distance z through combination of the exponential and modified Bessel functions.
In Section 2, we briefly describe the transition probability derived from the Bessel stochastic differential equation.
In this section, one main result on the close-to-convexity of the generalized Bessel function with several consequences is discussed in detail.
Dixit, An application of generalized Bessel functions oncertain analytic functions", Acta Universitatis Matthiae Belii.
“The Friedrich Wilhelm Bessel Award is a great honor for both Dr.
The fourth order BPFs of the following types were used: Bessel, Butterworth, elliptic, Chebyshev ([f.sub.1] = 0.01 Hz, [f.sub.2] = 75 Hz).
In contrast, a Bessel shape, which approximates an ideal Gaussian rolloff, appears to produce a much better step response.
Obviously, the Bessel functions [J.sub.m]([[lambda].sup.p.sub.j]x) are solutions of cylindrical waves without flow, which are not the eigenfunctions with shear flow.