نتایج جستجو برای: research model
تعداد نتایج: 3260331 فیلتر نتایج به سال:
پنل های خورشییدی دارای مشیه ه جریان -ولتاژ غیر خطی بوده و تنها در یک نقطه کار خاص، حداکثر توان را تولید می کنند. این نقطه بهینه توان با تغییر دما و شیدت نور تغییر می کند. روش های مهتلفی برای ردیابی نقطه حداکثر توان به صورت free model و based model معرفی شده است. این تحقیق روش جدیدی جهت بهبود عملکرد ردیابی نقطه حداکثر توان پنل های خورشیدی جدا از شبکه ارائه می دهد و الگوریتم روش پیشینهادی از دو...
run-out-table (rot) is located between last finishing stand and down coiler in a hot strip mill. as the hot steel strip passes from rot, water jets impact on it from top and bottom and strip temperature decreases approximately from 800-950 °c to 500-750°c. the temperature history that strip experience while passing through rot affects significantly the metallurgical and mechanical properties, s...
abstract the purpose of this study is to examine the economic impacts of developing and introducing almond late flowering cultivars during 1968 to 2019 years in iran, which developed in sahand horticultural research station using the economic surplus model and field and time series data. the estimation of shift parameter identifies that almond late flowering cultivars make almond supply curve m...
Background & aim: In some situations in quantitative or qualitative research, complementary tools would be of great help in data collection. Vignette is a data collection tool, which has been used for over 50 years in different disciplines including health sciences. Nonetheless, there is a paucity of information regarding this method. With this background in mind, the ...
The TIME model has been developed based on the understanding of causes that prevent completion design research projects. topic encompasses constructs orientation and education, where scientism in teaching leads to multiple methodological problems both theorizing professional practice. It is not overlooked it reason for numerous dropouts from graduate studies or systems due implementation scient...
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