نتایج جستجو برای: phase inversion

تعداد نتایج: 639871  

Journal: :Journal of Japan Oil Chemists' Society 1975

Journal: :International Journal of Multiphase Flow 2008

Journal: :Nano letters 2014
Feng-Chuan Chuang Liang-Zi Yao Zhi-Quan Huang Yu-Tzu Liu Chia-Hsiu Hsu Tanmoy Das Hsin Lin Arun Bansil

We use first-principles electronic structure calculations to predict a new class of two-dimensional (2D) topological insulators (TIs) in binary compositions of group III elements (B, Al, Ga, In, and Tl) and bismuth (Bi) in a buckled honeycomb structure. We identify band inversions in pristine GaBi, InBi, and TlBi bilayers, with gaps as large as 560 meV, making these materials suitable for room-...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2012
Sang Hoon Lee Sungmin Lee Seung-Woo Son Petter Holme

A system's response to external periodic changes can provide crucial information about its dynamical properties. We investigate the synchronization transition, an archetypical example of a dynamic phase transition, in the framework of such a temporal response. The Kuramoto model under periodically switching interactions has the same type of phase transition as the original mean-field model. Fur...

2011
Tomas Hornik Qing-Chang Zhong

Abstract— In this paper, an H∞ current controller is proposed to maintain a balanced neutral point for a three-phase fourwire inverter, which can be used in microgrid applications. The neutral-point circuit consists of a conventional neutral leg and a split DC link. The neutral point is balanced with respect to the two DC source terminals (as required, e.g., in neutral-pointclamped three-level ...

2013
Kleber C. Oliveira João Luiz Afonso Marcelo C. Cavalcanti

This paper presents a single-phase inverter with multilevel topology adopted to interface photovoltaic systems with the electrical power grid, and at the same time, to eliminate harmonics currents and to compensate reactive power, operating as shunt active power filter. Multilevel inverters have been attracting increasing attention in the past few years as power converters of choice in high vol...

Journal: :The journal of physical chemistry. B 2004
Yingfeng Yu Minghai Wang Wenjun Gan Qingsheng Tao Shanjun Li

The polymerization-induced phase-separation process of polyethersulfone (PES)-modified epoxy systems was monitored in situ continuously on a single sample throughout the entire curing process by using optical microscopes, time-resolved light scattering (TRLS), scanning electronic microscopes (SEM), and a rheometry instrument. At specific PES content a viscoelastic transformation process of phas...

Journal: :تحقیقات جغرافیایی 0
سعید جهانبخش اصل گروه جغرافیای دانشگاه تبریز رقیه روشنی گروه جغرافیای دانشگاه تبریز

in this research we have studied tabriz temperature inversion using radio-sound information, during the 2004-2008 periods in daily, monthly and seasonally scales. produced data associated with temperature inversion daily of the surface (2 meters) to 700 h.pa. several different measures are used, including the height of the base and the height of the top of the inversion, the temperature at the ...

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