نتایج جستجو برای: harmonic contribution

تعداد نتایج: 264990  

ثواقبی, مهدی, عسکریان ابیانه, حسین, لرزاده, ایمان,

To achieve accurate reactive power and harmonic currents sharing among inverter interfaced distributed generation (DG) units in islanded microgrids, a hierarchal control scheme consisting of primary and secondary levels based on instantaneous circulating currents is proposed in this paper. Firstly, fundamental and main harmonic components of each inverter output current are extracted at the pri...

Journal: :iranian red crescent medical journal 0
kemal peker erzincan university department of general surgery, erzincan, turkey; mengücek gazi eğitim ve araştırma hastanesi genel cerrahi, turkey. tel: +90-5359368528, fax: +90-4462122216 abdullah i̇nal erzincan university department of general surgery, erzincan, turkey huriye güllü erzincan university department of anesthesiology & reanimation, erzincan, turkey düriye gül erzincan university department of anesthesiology & reanimation, erzincan, turkey murat şahin erzincan university department of anesthesiology & reanimation, erzincan, turkey ayca dumanli ozcan palandoken state hospital department of anesthesiology & reanimation, erzurum, turkey

background haemorrhoids are cushions of submucosal vascular tissue located in the anal canal starting just distal to the dentate line. haemorrhoidal disease is a common anorectal disorder which has symptoms of bleeding, prolapse, pain, thrombosis, mucus discharge, and pruritus. haemorrhoidectomy is one of most frequently performed anorectal operation worldwide. objectives the aim of this study ...

Journal: :Speech Communication 2001
Marc Swerts Raymond N. J. Veldhuis

This paper explores whether a speaker's voice quality, de®ned as the perceived timbre of someone's speech, changes as a function of variation in speech melody. Analyses are based on several productions of the vowel `a', provided with di€erent intonation patterns. It appears that in general fundamental frequency covaries with the `strength relationship' between the ®rst two harmonics (H1±H2). Th...

Journal: :The European Physical Journal A 2021

Abstract The present contribution explores the symmetries of deformed harmonic oscillator for both prolate and oblate deformations. It demonstrates emergence clustering from degeneracies appearance cluster structures in associated densities. universality molecular is presented, demonstrating that molecular-like exchange protons neutrons encoded into mean-field. nature oblate-like also explored.

Journal: :Current Directions in Biomedical Engineering 2022

Abstract Electrical impedance tomography (EIT) has the potential for monitoring perfusion in addition to respiration on bedside. Several separation methods were reported, e.g. Filtering, ECG-gating and PCA. However, is not trivial, which why harmonic analysis was introduced EIT data analysis. It based several assumptions therefore prove of plausibility necessary. In this contribution a two-dime...

Journal: :bulletin of the iranian mathematical society 2011
j. li

The increase in the number of pulses in multipulse rectifiers leads to a reduction in harmonic current distortion. But this increase in the number of pulses leads to an increase in kVA, cost, and complexity of the multi-pulse rectifiers. As a result, in industrial applications, 12-pulse rectifiers are mainly used due to their lightweight, simple transformers, and low kVA rate, and low cost. The...

Journal: :E-journal of Surface Science and Nanotechnology 2022

Second harmonic generation (SHG) is a unique non-linear optical effect that can be used to investigate chemical states of molecules at surfaces/interfaces. By the use soft X-rays, SHG gains element selectivity through inner-core excitation resonance. However, it challenging observe signals separately from second-order light generated undulator. Here, we report new ellipsometry method for X-ray ...

Journal: :Coastal Engineering 2021

Abstract Spurious harmonics generation can occur in wave basins when strongly nonlinear waves are generated with linear maker theory. For regular long crested waves, the phenomena is known to cause a beating pattern for amplitude of higher harmonics, while irregular effect often thought average out. We here report on recent experimental results spurious harmonic highly waves. Long at two depths...

Introduction: This study aimed to compare operation time, intraoperative bleeding and postoperative pain between cold dissection tonsillectomy and harmonic scalpel tonsillectomy.  Materials and Methods: In this single-blinded clinical trial, 32 patients aged 14–48 were enrolled. Each patient randomly underwent tonsillectomy using the harmonic scalpel on one side and cold dissection on the other...

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