Results 21 to 30 of about 1,631,794 (168)

A Novel DOA Estimation for Distributed Sources in an Impulsive Noise Environment

open access: yesIEEE Access, 2020
Direction of arrival (DOA) estimation has emerged as a promising technology for many military and civilian applications, such as radio astronomy and wireless communications.
Quan Tian   +3 more
doaj   +1 more source

Evaluation of the Gauss Integral

open access: yesStats, 2022
The normal or Gaussian distribution plays a prominent role in almost all fields of science. However, it is well known that the Gauss (or Euler–Poisson) integral over a finite boundary, as is necessary, for instance, for the error function or the ...
Dmitri Martila, Stefan Groote
doaj   +1 more source

Immobilization of maize tassel in polyvinyl alcohol for the removal of phosphoric compounds from surface water near farmland

open access: yesCogent Engineering, 2021
In this study, proximate analysis and characterization techniques were carried out on maize tassel fibers immobilized with Polyvinyl Alcohol (PVA) for its usability as a biosorbent for adsorption process.
Muibat Diekola Yahya   +4 more
doaj   +1 more source

Guaranteed Performance of Nonlinear Attitude Filters on the Special Orthogonal Group SO(3)

open access: yesIEEE Access, 2019
This paper proposes two novel nonlinear attitude filters evolved directly on the special orthogonal group $\mathbb {SO}\left ({3}\right)$ , able to ensure prescribed measures of transient and steady-state performance.
Hashim A. Hashim   +2 more
doaj   +1 more source

Asymptotic Expansions for Moench’s Integral Transform of Hydrology

open access: yesMathematics, 2023
Theis’ theory (1935), later improved by Hantush & Jacob (1955) and Moench (1971), is a technique designed to study the water level in aquifers. The key formula in this theory is a certain integral transform H[g](r,t) of the pumping function g that ...
José L. López   +2 more
doaj   +1 more source

Solving optimal control problems of the time-delayed systems by a neural network framework

open access: yesConnection Science, 2019
A numerical method using neural networks for solving time-delayed optimal control problems is studied. The problem is first transformed into one without a time-delayed argument, using a Páde approximation.
Alireza Nazemi   +2 more
doaj   +1 more source

Overview of intelligent optimization algorithm design of FIR digital filter

open access: yesDianzi Jishu Yingyong, 2021
This article summarizes the intelligent optimization algorithm of finite impulse response digital filter(FIR). The main idea of optimization design is to transform the digital filter design problem into the error function minimization problem.
Zhang Shuyu, Wang Ting
doaj   +1 more source

Fractional power series neural network for solving delay fractional optimal control problems

open access: yesConnection Science, 2020
In this paper, we develop a numerical method for solving the delay optimal control problems of fractional-order. The fractional derivatives are considered in the Caputo sense.
Farzaneh Kheyrinataj, Alireza Nazemi
doaj   +1 more source

Complex Zeros of the Error Function and of the Complementary Error Function [PDF]

open access: yesMathematics of Computation, 1973
The first one hundred zeros of the error function and of the complementary error function are given. An asymptotic formula for the higher zeros is also derived.
Fettis, Henry E.   +2 more
openaire   +2 more sources

Analytic Error Function and Numeric Inverse Obtained by Geometric Means

open access: yesStats, 2023
Using geometric considerations, we provided a clear derivation of the integral representation for the error function, known as the Craig formula. We calculated the corresponding power series expansion and proved the convergence.
Dmitri Martila, Stefan Groote
doaj   +1 more source

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