نتایج جستجو برای: dynamic operation

تعداد نتایج: 603779  

J. Soltani and M. Fallah,

In this paper, computer simulation of a three-phase synchronous motor drive is described. This drive/system is supplied with a new type of pulse-width modulated voltage source inverter (PWM VSI) whose amplitude of the first harmonic, compared to a conventional sinusoidal PWM VSI, is increased by about 17% and whose amplitude of higher harmonics is also reduced inversely proportional to their or...

This paper proposes a method for extending the ability of rotary power flow controller (RPFC) using tap-changer of the RPFC’s transformers. A detailed model of the device is presented to analyze the effects of the tap changer operation on the performance of the RPFC. To evaluate the results, the RPFC model is simulated using PSCAD/EMTDC software. Dynamic operation of the RPFC on a 400 kV transm...

The use of different optical-fiber sensors for weighing measurements is Abstract described. By using three different mechanical stressing mechanisms, the operation of the fiber-to-fiber transducer systems are tested and the results are presented. Parameters such as sensitivity, hysteresis, resolution, and dynamic range are measured. A comparison of the results has shown that the sensor system m...

J. Soltani and M. Fallah,

In this paper, computer simulation of a three-phase synchronous motor drive is described. This drive/system is supplied with a new type of pulse-width modulated voltage source inverter (PWM VSI) whose amplitude of the first harmonic, compared to a conventional sinusoidal PWM VSI, is increased by about 17% and whose amplitude of higher harmonics is also reduced inversely proportional to their or...

ژورنال: بیهوشی و درد 2014
الماسی, افشین , جلالوندی, فرشته , ستایشی, خسرو , فرزام, حسین , محمدبیگی, فرامرز ,

Aims and Background: Acute pain after operation is one of the common side effects. Prescription of systemic analgesics and narcotics has however also various side effects therefore, a more appropriate method is the creation of local pain relief, and it is desirable to provide better and longer-lasting analgesia by the infusion of lower doses of drugs. This study compared the effects of adding t...

پایان نامه :موسسه آموزش عالی غیر دولتی و غیرانتفاعی علامه محدث نوری (ره) - پژوهشکده اقتصاد 1393

dynamic assessment according to vygotskys sociocultural theory, states that instruction and assessment are interrelated. using static forms of assessment with second and foreign language students could do more harm than good. many teachers neglect to take account of the complexity involved in learning a second or foreign language and often wonder why learning of a language take so long. thi...

Journal: :Journal of the Japan Society for Precision Engineering 1990

Journal: :IEEE Journal on Selected Areas in Communications 2016

2013

This thesis investigates the potential benefits of dynamic operation of wavelengthrouted optical networks (WRONs) compared to the static approach. It is widely believed that dynamic operation of WRONs would overcome the inefficiencies of the static allocation in improving resource use. By rapidly allocating resources only when and where required, dynamic networks could potentially provide the s...

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