نتایج جستجو برای: harmonic injection
تعداد نتایج: 204323 فیلتر نتایج به سال:
the harmonic index h(g) , of a graph g is defined as the sum of weights 2/(deg(u)+deg(v)) of all edges in e(g), where deg (u) denotes the degree of a vertex u in v(g). in this paper we define the harmonic polynomial of g. we present explicit formula for the values of harmonic polynomial for several families of specific graphs and we find the lower and upper bound for harmonic index in caterpill...
The injection of a seed in a free-electron laser (FEL) amplifier reduces the saturation length and improves the longitudinal coherence. A cascaded FEL, operating in the high-gain harmonic-generation regime, allows us to extend the beneficial effects of the seed to shorter wavelengths. We report on the first operation of a high-gain harmonic-generation free-electron laser, seeded with harmonics ...
Abstract Background Injection laryngoplasty is a surgical procedure used in management of glottal insufficiency. The objective this study was to assess respiratory and voice outcomes office-based injection patients with unilateral vocal fold paralysis (UVFP). Ten underwent via transcutaneous approach using Radiesse or hyaluronic acid. Auditory perceptual assessment (APA), handicap index (VHI), ...
this paper presents a new control methodology for active power filters that provide an adaptive online harmonic estimation with partial and selective harmonic reduction schemes, which has been implemented within an integrated controller. the proposed approach is to provide partial and selective reduction of those individual harmonics which exceed the recommended levels as set by regulatory bodi...
Due to inherent time delays in the control system of Hybrid Active Power Filter with Injection Circuit (IHAPF) and the load harmonic currents changes rapidly and dramatically. In order to eliminate these harmonic currents, an IHAPF to be used must be able to respond quickly following variable of the harmonic currents. So, this paper proposes a PID-fuzzy control method with time-delay compensati...
oped a good expertise in the Ni in incidence pumping (DGRIP) scheme the beam quality and the spatial coherence as well as the pointing stability of plasma has been successfully demonstrated by using high harmonic (HH) radiation for injection for spectroscopy of heavy ions in the experimental st rage ring (ESR) and in the upcoming storage ring at FAIR (NESR) will bene XRL. A successful seeding p...
At present, the research on five-level inverters mainly involves the modulation algorithm and topology, and few articles study the five-level inverter from the control strategy. In this paper, the nonlinear passivity-based control (PBC) method is proposed for single-phase uninterruptible power supply inverters. The proposed PBC method is based on an energy shaping and damping injection idea, wh...
This article is a study on the analysis of harmonics reductions and load voltage control for Vienna Rectifier (VR) with help of the Triplen Harmonic Injection (THJ) and the proportional integral controller (PIC). The sinusoidal PWM is the easiest modulation technique for AC-DC rectifiers to comprehend; however, it is not capable of entirely using the accessible DC bus source voltage. In order t...
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