Results 11 to 20 of about 438,567 (296)

Steady-periodic method for modeling mode instability in fiber amplifiers

Optics Express, 2013
We present a detailed description of the methods used in our model of mode instability in high-power, rare earth-doped, large-mode-area fiber amplifiers.
Smith, Arlee V., Smith, Jesse J.
core   +3 more sources

A microrod-resonator Brillouin laser with 240 Hz absolute linewidth [PDF]

, 2015
We demonstrate an ultralow-noise microrod-resonator based laser that oscillates on the gain supplied by the stimulated Brillouin scattering optical nonlinearity.
Baynes, Fred N., Becker, Joe, Coillet, Aurelien, Cole, Daniel C., Diddams, Scott A., Loh, William, Papp, Scott B.   +6 more
core   +4 more sources

Operation-Adaptive Damage Assessment of Steam Turbines Using a Nonlinear Creep-Fatigue Interaction Model

IEEE Access, 2020
For sustainable operation, power plants require accurate damage assessment of the steam turbines used for power generation. In the past few decades, steam turbine designs have considered only steady-state operation, without accounting for thermal cyclic ...
Woosung Choi, Heonjun Yoon, Byeng Dong Youn   +2 more
doaj   +1 more source

Recent progress of the development of a long pulse 140GHz ECRH system on EAST [PDF]

EPJ Web of Conferences, 2019
A long pulse ECRH system with a goal of 140GHz 4MW 100~1000s has been developed to meet the requirement of steady-state operation on EAST. Gycom gyrotrons are employed in the No.1 and No.3 systems, CPI gyrotrons are used in the No.2 and No.4 systems. The
Xu Handong, Wang Xiaojie, Zhang Jian, Liu Fukun, Huang Yiyun, Shan Jiafang, Xu Weiye, Li Miaohui, Lohr J., Gorelov Y.A., Anderson J.P., Zhang Yang, Wu Dajun, Hu Huaichuan, Yang Yong, Feng Jianqiang, Tang Yunying, Li Bo, Ma Wendong, Wu Zege, Wang Jian, Zhang Liyuan, Guo Fei, Sun Haozhang, Yan Xinsheng   +24 more
doaj   +1 more source

Average Model-Based Feedforward and Feedback Control for PUC5 Inverter

IEEE Access, 2020
This paper proposes new average model based control strategies for a 5-level Packed U-cell (PUC5) inverter in both standalone and grid-connected modes of operation.
Khaled Rayane, Mohamed Bougrine, Abdelbasset Krama, Atallah Benalia, Mohamed Trabelsi, Haitham Abu-Rub   +5 more
doaj   +1 more source

Two-dimensional steady-state thermal analytical model of permanent-magnet synchronous machines operating in generator mode

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2021
Purpose Thermal analysis of electrical machines is usually performed by using numerical methods or lumped parameter thermal networks depending on the desired accuracy. The analytical prediction of temperature distribution based on the formal resolution of thermal partial differential equations (PDEs) by the harmonic modeling technique (or the Fourier ...
Djelloul-Khedda, Zakarya, Boughrara, Kamel, Dubas, Frédéric, Guo, Baocheng, Ailam, El Hadj   +4 more
openaire   +1 more source

Intermodal stability of a coupled-cavity semiconductor laser [PDF]

, 1986
We present an analysis of the steady-state operation of a two-element coupled-cavity laser near a mode hop. The equations of motion for the two cavities and two relevant modes of a longitudinally coupled-cavity laser are reduced to a system of ...
Lang, Robert J., Yariv, Amnon
core   +1 more source

Investigation of the Temperature Field Distribution in an EI Type Iron-Cored Coil Using 3D FEM Modeling at Different Load Conditions

Energies, 2023
In this present paper, results for the temperature distribution in electromagnetic construction in the form of coil coupled with EI-type ferromagnetic core are presented. This construction is typical for small electric transformers (AC operation mode) or
Denitsa Darzhanova, Ilona Iatcheva
doaj   +1 more source

Energy efficiency and transient-steady state performance comparison of a resistance infant incubator and an improved thermoelectric infant incubator

Engineering Science and Technology, an International Journal, 2022
The present study aims to contribute energy related research by comparing thermal hydraulic performance parameters including energy consumptions, set temperature precisions and noise levels of newly improved thermoelectric infant incubator having ...
Osman Yeler, Mehmet Fevzi Koseoglu
doaj   +1 more source

Concurrent operation of 10 gyrotrons at W7-X experience and improvement opportunities

EPJ Web of Conferences, 2018
At the stellarator Wendelstein 7-X (W7-X) Electron Cyclotron Resonance Heating (ECRH) is the main heating system for steady-state operation and was the only available heating system during the operation phase OP1.2a in 2017.
Braune H., Brunner K.J., Laqua H.P., Marsen S., Moseev D., Noke F., Purps F., Schneider N., Schulz T., Stange T., Uhren P., Wilde F.   +11 more
doaj   +1 more source