نتایج جستجو برای: coefficient of performance

تعداد نتایج: 21231285  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده ادبیات و علوم انسانی 1389

methodology non-native participants in this study were sixty ba students majoring in english literature and teaching english as a foreign language at khayyam university of mashhad. they were senior students, between 21 to 24 years old, who had studied english for at least three and a half years and had passed several courses including grammar, reading, conversation, and writing. this was assum...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

2015
Jae-Won Park Jae-Hung Han

a r t i c l e i n f o a b s t r a c t A shunted piezoelectric is a device to suppress vibration consisting of a piezoelectric material and a shunt circuit connecting between two electrodes of the piezoelectric material. The sensitivity of damping performances is analyzed for passive shunted piezoelectrics: a resistive, a series resonant, and a parallel resonant shunted piezoelectric. The parame...

2014
M. Hasan S. M. Mominuzzaman Ali Naderi

For the first time, a deep study of gate control coefficient (αG) effect on CNTFET performance has done in this research. A new, analytical CNTFET simulation along with multiple parameter approach has executed with 3D output in MATLAB and that used it to examine device performance. It is found that, drain current and transconductance increases with high gate control coefficient. On the other ha...

Journal: :Journal of Sustainable Development of Energy, Water and Environment Systems 2017

Journal: :تحقیقات کتابداری و اطلاع رسانی دانشگاهی 0
سید مهدی شریفی استادیار دانشکدۀ مدیریت دانشگاه تهران محمد تابان استادیار دانشگاه ایلام وحید شرفی دانشجوی دکتری مدیریت بازرگانی سمنان

the purpose of this study was to investigate the relationship between strategic thinking and performance of employees who worked in libraries’ employees of ilam university. research method was descriptive –correlational in which especially structural equation modeling was used. all of libraries’ employees of ilam university (n=200) was made the population of study and via morgan’s table 127 sub...

Journal: :physical chemistry and electrochemistry 0

in this study, a temperature-dependent of the dispersion coefficients is calculated from equation state.the lennard-jones lj (12-6-3) effective pair potential function and simple thermodynamic argumentwith the input pvt data of liquid metals are used to calculate the dispersion coefficients. the dispersioncoefficients ( , , ) 3 6 12 c c c are found to be a linear function of 1/t1+α , where t is...

Journal: :پژوهش های علوم دامی ایران 0
حسین مهربان همایون فرهنگ فر جواد رحمانی نیا حسین علی سلطانی

a total of 260709 monthly test day milk records of 30903 first lactation holstein cows was used to determine the best function to describe the lactation curve. the records were obtained from first lactation holstein of 216 herds from 1988 to 2006 in khorasan province. the functions used in current study were wood’s incomplete gamma function, ali and schaeffer function, and legendre function of ...

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