In this paper, an improved empirical formula modeling method using neuro-space mapping (Neuro-SM) for coupled microstrip lines is proposed. Empirical formulas with correction values are used the coarse model, avoiding a slow trial-and-error process. The proposed model uses neural networks (MNNs), including both geometric variables and frequency to improve accuracy fewer variables. Additionally,...

Estimation of the magnitude and frequency of maximum instantaneous discharges and hydrographs are used for a variety of purposes, such as the design of bridges, culverts, flood-control structures; and the management and regulation of floodplains. Fuller (1914), developed a flood-frequency formula based on analysis of flood peaks in hundred of streams to provide simple methods of estimating maxi...

Dielectronic recombination (DR) cross sections and rate coefficients are calculated for the isonuclear sequence FeZ+, with Z = 21, 20, 19, 18, 17, and 16, in which L-shell (2p-) excitations are involved during the initial capture. Most of the dominant transitions with ∆n = 0, using angular momentum average (AMA) approximation, are considered. It is found that the states 3pnd and 3dnd contribute...

Introduction Conclusions References Tables Figures Back Close Abstract Introduction Conclusions References Tables Figures Back Close Abstract The Empirical Orthogonal Function (EOF) retrieval technique consists of calculating the eigenvectors of the spectra to later perform a linear regression between these and the atmospheric states, this first step is known as training. At a later stage, know...

This paper presents a modified high-accuracy empirical formula for the strain concentration factor in centrally-placed countersunk holes isotropic plate under uniaxial tension. Finite Element Method (FEM) was used to investigate effect of problem geometric parameters including, width and thickness, as well hole radius, countersinking depth angle on factor. The important influence Poisson’s rati...