نتایج جستجو برای: شکل back emf

تعداد نتایج: 225515  

2017
Milou van Heuckelum Cornelia H M van den Ende Anne E J Houterman Charlotte P M Heemskerk Sandra van Dulmen Bart J F van den Bemt

OBJECTIVE This study aims to assess the efficacy of Electronic Monitoring Feedback (EMF) as an intervention to improve medication adherence (i.e. dose- or full adherence) and clinical outcomes in adult patients. METHODS A systematic search was performed in Medline, EMBASE, PsycINFO and Web of Science and reported according to the PRISMA guidelines. Randomised controlled trials (RCTs) comparin...

2014
Qixin Zhu Zheng Zhang Hongli Liu Guoping Zhang

For the problems of buffeting and phase delay in traditional rotor detection in sensorless vector control of permanent magnet synchronous motor (PMSM), the Sigmoid function is proposed to replace sign function and the approach of piecewise linearization is proposed to compensate phase delay. To the problem that the output of traditional low pass filter contains high-order harmonic, two-stage fi...

2013
A. Kanimozhi

Due to the small inductance, modulation of three phase inverter induces serious torque ripple. In addition, the increase in modulation frequency is limited by the processor speed. Therefore, the traditional torque control approaches are not suitable. In order to solve the aforementioned problems, a new instantaneous torque control method for small inductance brushless dc motor is proposed by im...

2016
Peifeng Xu Kai Shi Huangqiu Zhu Frede Blaabjerg

Abstract: This paper presents a comprehensive analytical model for dual rotor radial flux wind generators based on the equivalent magnetic circuit method. This model is developed to predict the flux densities of the inner and outer air gaps, flux densities of the rotor and stator yokes, back electromotive force (EMF), electromagnetic torque, cogging torque, and some other characteristics import...

2015
Jing Zhao Zhongxin Gu Bin Li Xiangdong Liu Xiaobei Li Zhen Chen

Due to advantages such as high energy density, high power density, rapid charge and discharge, high cyclic-life, and environmentally friendly, flywheel energy storage systems (FESs) are widely used in various fields. However, the performance of FES systems depends on the performance of a high speed machine, therefore, the design and optimization of a high efficiency and high power density machi...

Journal: :The New phytologist 2007
Takahide A Ishida Kazuhide Nara Taizo Hogetsu

To advance our understanding of host effects on the community structure of ectomycorrhizal fungi (EMF), EMF communities were compared among different host species, genera and families in two mixed conifer-broadleaf forests in Japan. Using molecular identification methods we examined EMF root tips of eight coexisting species belonging to six genera (three families): Abies and Tsuga (Pinaceae), B...

2006
Karsten Ehrig Dániel Varró

In the paper, we propose various approaches for tool integration based on model transformations over the Eclipse Modeling Framework (EMF). EMF is a key technology for tool integration, which provides a framework for developing domain-specific modeling languages by automatically generating Java code for model manipulation. Model transformations can be captured by graph transformation systems, wh...

Journal: :The Plant cell 1997
L Chen J C Cheng L Castle Z R Sung

Mutations in EMBRYONIC FLOWER (EMF) genes EMF1 and EMF2 abolish rosette development, and the mutants produce either a much reduced inflorescence or a transformed flower. These mutant characteristics suggest a repressive effect of EMF activities on reproductive development. To investigate the role of EMF genes in regulating reproductive development, we studied the relationship between EMF genes ...

Journal: :Brain research 2015
Arzu Şahin Ali Aslan Orhan Baş Ayşe İkinci Cansu Özyılmaz Osman Fikret Sönmez Serdar Çolakoğlu Ersan Odacı

Children are at potential risk due to their intense use of mobile phones. We examined 8-week-old rats because this age of the rats is comparable with the preadolescent period in humans. The number of pyramidal neurons in the cornu ammonis of the Sprague Dawley male rat (8-weeks old, weighing 180-250 g) hippocampus following exposure to a 900 MHz (MHz) electromagnetic field (EMF) were examined. ...

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