A conventional high power DC power supply systems consist of a three-phase diode rectifier followed by a high frequency converter to supply loads at regulated DC voltage. These rectifiers draw significant harmonic currents from the utility, resulting in poor input power factor. In this paper, a DC power supply based on dual-bridge matrix converter (DBMC) with reduced number of switches is p...

Directed motivational current (DMC) ̶ as a novel strand in L2 motivational field ̶ is a robust motivational drive fueled by a highly valued goal and capable of stimulating and sustaining long-term behavior. The present study explored English as a foreign language students’ Directed Motivational Currents by validating the dynamic web-based Persian version of the scale, finding the most crucial mot...

The student movement is considered as one of the important issues of Iranian political sociology, but its role and its nature and its relationship with other movements and movements in Iran have been discussed. The present article is trying to answer the role and function of the student movement in Iran. Using a descriptive-analytic approach, political currents have become instrumental in most ...

The purpose of this study is to identify the role of sport as a soft power for Iranto facilitate its diplomatic relations after the nuclear deal. The research methodused in this study is mixed (qualitative and quantitative): in the qualitative part ofthe analysis, the study sample was selected via Snowball sampling based onpartricipants’ expertise in the sport diplomacy ...

It is proposed to use a single base platform in the Persian Gulf considering its low depth and more appropriate environmental conditions in comparison to North Sea and Mexico Gulf where this kind of platform is very popular. The pile of platform is responsible for transmission of environmental loads resulted from waves, currents, wind and dead loads to foundation of platform. Using SACS 5.3 sof...

in this paper, a new field oriented control scheme with maximum torque for permanent magnet hysteresis synchronous (pmhs) motor has been presented. vector control method provides significant improvement to the dynamic performance of ac motors but in this method d- axis current is controlled such as the ratio of motor torque to motor current is a maximum, then the dynamic performance will be ver...

this article is a report of calculation and measurements of a p+-n insb photo-diode leakage current fabricated by mesa on the basis of the calculation and measurement of different leakage currents in insb photo-diode along with its variation it shows that at relatively low reverse biases (up to about 300 mv) g-r and shunt current are dominant. but at high reverse biases the tunneling current do...