In transformers the main consequence of harmonic currents is an increase in losses, mainly in windings, because of the deformation of the leakage fields. Higher losses means that more heat is generated in the transformer so that the operating temperature increases, leading to deterioration of the insulation and a potential reduction in lifetime. This paper includes the effects of non-sinusoidal...

In this paper, we address the estimation of the parameters of the two dimensional sinusoidal signal model. The proposed method is the two dimensional extension of the one dimensional noise space decomposition method. The proposed methods provide consistent estimators of the unknown parameters and they are non-iterative in nature. We propose a pairing algorithm also, which helps in identifying t...

ABSTRACT: Probability theory is applied to the problem of estimating the amplitudes of the sinusoids in nuclear magnetic resonance data containing two exponentially decaying sinusoids. The posterior probability-density of one of the amplitudes is derived independent of the phases, frequencies, decay-rate constants, variance of the noise, and the amplitude of the other sinusoid. This probability...

Vapor compression heat pumps have the potential to meet future development requirements of thermal management in aerospace due ability achieve high flux dissipation, precise temperature control, and a more compact lightweight structure. In this study, variable-angle test stand was constructed investigate effect gravity on performance, distribution, oil circulation rate vapor pump system ground ...

The phonon Boltzmann transport equation (BTE) has been widely utilized to study thermal in solids. While for a number of materials the exact solution BTE obtained uniform heat flow, problems arising micro/nanoscale have analyzed within relaxation time approximation (RTA). Since RTA breaks down at temperatures low compared Debye temperature, this prevents an important class high temperature such...

introduction: cisplatin is an antineoplastic drug, which is widely used for the treatment of solid tumors. however, its clinical usage is limited because of its side effects such as hepatotoxicity. this study aimed to identify toxic effects of cisplatin on hepatocytes of rats. methods: a total of 45 adult sprague dawley rats weighing 200±30 g were randomly divided into experimental (n=30) and c...

In this paper, a three-dimensional, single-phase proton-exchange membrane fuel cell (PEMFC) is studied numerically. Finite volume method was used for solving the governing equations and, consequently, the numerical results were validated by comparing them with experimental data, which showed good agreement. The main objective of this work is to investigate the effect of a novel gas channel shap...

In this study, we have theoretically investigated the effect of electron stopper layer on internal temperature distribution of high performance vertical cavity surface-emitting laser emitting at 1305 nm. Simulation software PICS3D, which self-consistently combines the 3D simulation of carrier transport, self-heating, gain computation and wave-guiding, was used. Simulation results show that chan...

A fiber optics image-transferring element is nonisoplanatic over a surface region containing only a few fundamental resolution elements, and no meaningful or consistent evaluation of a fiber optics image can be made by examining such a nonisoplanatic region. A holographic scheme offers a solution to the problem of fiber optics image evaluation based upon examination of a nonisoplanatic region. ...

The Gaussian white noise and the sum-of-sinusoids methods of systems analysis provide equivalent descriptions of nearly linear and strongly nonlinear transductions in the cat retina. Smoothness in the frequency domain is a common characteristic of biological transductions. This permits a substantial improvement in the signal-to-noise ratio by using the sum-of-sinusoids method, as is demonstrate...