An electron spin resonance (ESR) imaging system, capable of acquiring three-dimensional (3D) images with a resolution of ,10310330 mm in a few minutes of acquisition, is presented. This ESR microscope employs a commercial continuous wave ESR spectrometer, working at 9.1 GHz, in conjunction with a miniature imaging probe (resonator+gradient coils), gradient current drivers, and control software....

abstract background: regarding the diagnostic errors of the classic criteria including serum ascites albumin gradient (saag), total protein concentration and the adapted light et al’s criteria in distinguishing transudate versus exudates, we evaluated the ascitic fluid to serum bilirubin ratio as a new criteria in this regard. we also evaluated whether the combination of bilirubin ratio with ea...

Abstract We consider a non-negative and one-homogeneous energy functional $${{\mathcal {J}}}$$ J on Hilbert space. The paper provides an exact relation between the solutions of associated gradient-flow equations energetic generated via rate-independent system given in terms time-dependent {E}}}(t,u)= t {{\mat...

This paper used the gradient blind signal separation algorithm to carry out the electrical power system harmonic signal analysis through the simulation experiment. The experiment result proved that the electrical power system harmonic signal separation based on the gradient algorithm is accurate. Through comparing the separation performance by using the different step size, the adaptive changin...

A new learning strategy is proposed for training of radial basis functions (RBF) network. We apply two different local optimization methods to update the output weights in training process, the gradient method and a combination of the gradient and Newton methods. Numerical results obtained in solving nonlinear integral equations show the excellent performance of the combined gradient method in ...

INTRODUCTION: Fast, efficient MRI measurements rely on magnetic field gradient system with high fidelities. Great hardware improvements, such as actively shielded gradient coil and delicate gradient waveform pre-emphasis, have been made to meet this goal. Modern MRI techniques, however, see a trend putting an increasing expectation on gradient system perfection [1]: single shot (EPI, RARE) and ...

We study the problem of finding a local minimum of a multilinear function E over the discrete set {0, 1}. The search is achieved by a gradient-like system in [0, 1] with cost function E. Under mild restrictions on the metric, the stable attractors of the gradient-like system are shown to produce solutions of the problem, even when they are not in the vicinity of the discrete set {0, 1}. Moreove...

Laser forming is a thermal forming process which uses laser beam irradiation to produce the desired final forms. In this article, the effect of temperature gradient across  Al 6061-T6 aluminum sheets on bending angle is studied. Input parameters including laser power, scan velocity, beam diameter, and sheet thickness are the effective process parameters which influence the temperature gradient....