نتایج جستجو برای: power factor

تعداد نتایج: 1305120  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی برق و کامپیوتر 1391

power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...

2014
Lauryn L. Baranowski G. Jeffrey Snyder Eric S. Toberer

It is commonly claimed that achieving maximum power from a thermoelectric generator necessitates electrical load matching conditions instead of the operating condition derived for maximum generator efficiency. Here we explain why the electrical load matching claim for maximum power in a design optimization is flawed and show that the load condition derived for maximum efficiency always produces...

2014
T. Ajith Bosco

The main objective of the study is to analysis and design parallel boost power converter for power factor correction using an active filtering approach by implementing single-phase soft-switching technique with an active snubber circuit. Zero voltage transition to turn ON and zero current transition to turn OFF is implemented by the active snubber circuit for the main switches with no any furth...

2005
Huang-Jen Chiu Hsiu-Ming Huang Li-Wei Lin Shann-Chyi Mou Pang-Jung Liu

This paper presents a single-stage ZVT full-bridge AC/DC converter for aerospace applications. The detailed operating principle and design consideration of this soft-switched converter are analyzed and described. The proposed circuit topology and control scheme are proposed to exhibit optimum performances (i.e. high power factor, high efficiency, ring-free and low EMI features). A laboratory pr...

Journal: :مدیریت اطلاعات سلامت 0
اسداله شمس استادیار، مدیریت بهداشت، مرکز تحقیقات مدیریت و اقتصاد سلامت دانشگاه علوم پزشکی اصفهان (نویسنده ی مسؤول) email: [email protected] راحله سموعی کارشناس ارشد، روانشناسی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. حبیبه پورریاحی دانشجوی کارشناسی، مدیریت خدمات بهداشتی درمانی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران.

introduction: management is one of the most important factors for life, development, growth or death of any organizations including hospitals. the power is of one of the main concepts that by focusing on the fundamental and theoretical efforts considered as an important factor at all levels of management and human resources. managers who know the sources of power and are using them, have more e...

ژورنال: رویش روانشناسی 2021

For some people, social status seems to be a factor in saving electricity power. The aim of this study was to develop and validate an electricity-saving scale based on social status upgrading. In conducting this study, using the relevant theories, the scale was prepared. For investigating validity and reliability the opinion of experts, exploratory and confirmatory factor analysis, and Cronbach...

Journal: :journal of petroleum science and technology 2015
chunsheng pu liming zheng jing liu jiaxiang xu

foam injection is widely applied in amounts of fields to drilling, production, and formation protection. sometimes, the application result is disappointing, which is caused by the failure of bubble generation in foam flooding. therefore, it is necessary to seek ways for improving the performance of foam injection. an increased disturbance to the stratum, like the vibration caused by a seismic o...

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