We solve the Calderón inverse conductivity problem [Calderón (1980, 2006)], for an elliptic type equation in a rectangular plane domain, to recover an unknown conductivity function inside the domain, from the over-specified Cauchy data on the bottom of the rectangle. The Calderón inverse problem exhibits threefold simultaneous difficulties: ill-posedness of the inverse Cauchy problem, illposedn...

To improve the performance of vehicle suspension, this paper proposes a semi-active suspension with magnetorheological fluid (MRF) damper. We designed an optimized fuzzy skyhook controller grey wolf optimizer (GWO) algorithm base on new neuro-inverse model MRF Because inverse damper is difficult to establish directly, Elman neural network was applied. The novelty study application for vibration...

Four fractal nonlinear oscillators (The Duffing oscillator, attachment Toda and a oscillator) are successfully established by He’s derivative in space, their variational principles obtained semi-inverse transform method. The approximate frequency of the four found simple formula. results show formula is powerful tool to class oscillators.

background: obesity is growing rapidly in our country. nutrition is an important associate of obesity. the aim of this study was to determine the association between fruit and vegetable intake with the waist circumference and the body mass index (bmi) among young female university students.   methods: this cross sectional study was conducted on 236 healthy female university students aged betwee...

in the linear system ax = b the points x are sometimes constrained to lie in a given subspace s of column space of a. drazin inverse for any singular or nonsingular matrix, exist and is unique. in this paper, the singular consistent or inconsistent constrained linear systems are introduced and the effect of drazin inverse in solving such systems is investigated. constrained linear system arise ...

It is well-known that the set of h -terms modulo &-convertibility is a semi-group with I as identity element and composition 0, defined by M 0 N = BMN, where B = hxyt . x(yz). In [6, pp. 167,168] the question is raised under what conditions an element in this semi-group has an inverse. DezanXiancaglini gave in [8] a characterization of (w.r.t. A&-calculus) invertible terms having a normal form ...