نتایج جستجو برای: data envelope analysis

تعداد نتایج: 4509828  

Journal: :Ultrasound in medicine & biology 2006
Haifeng Tu James Zagzebski Quan Chen

Previously we described a video signal analysis (VSA) method for measuring backscatter and attenuation from B-Mode image data. VSA computes depth-dependent ratios of the mean echo intensity from a sample to the mean echo intensity from a reference phantom imaged using identical scanner settings. The slope of a line-fit of this ratio (expressed in dB) versus depth is related to the attenuation o...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده علوم انسانی و اجتماعی 1391

the present study aimed to investigate the possible effects of focused highlighted error feedback on grammatical accuracy of writing among iranian intermediate efl learners. after selecting 52 homogenous participants from among 70 university students attending azad university of rasht and randomly dividing them into two intact groups of 26 students, the researcher exposed the participants of th...

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

iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی - دانشکده علوم انسانی 1392

the main purpose of the present study was to investigate the relationship between listening proficiency and metacognitive listening strategies awareness among low, mid, and highly self-regulated students. three hundred and seventy one efl students participated in this study (all grade 3 and 4 high-school students who were studying in khansar in academic year 1391-92). to gather the data, three ...

Journal: :تحقیقات آب و خاک ایران 0
کامی کابوسی عبدالمجید لیاقت حسن رحیمی

regarding the role and importance of subsurface drainage in water table control, many studies have been made throughout the world to find out new techniques and more economical solutions, especially as related to different pipe envelope material and their installations. this research was conducted to investigate the use of rice husk, as drain envelope material, in drainage installations. in add...

ژورنال: علوم آب و خاک 2015
جمالدینی, مهسا, سپاس‌خواه, علی‌رضا, نوشادی, مسعود,

In this research, the hydraulic behavior of two kinds of envelopes including synthetic envelope, PP450 and gravel envelope with USBR standard in two soil tank models with silty loam texture was investigated. Three water heads including 55, 75 and 105 cm (water logging) from drain level were used. The discharge of pipe drain in the steady state condition for gravel envelope and at 55, 75 and 105...

Journal: :international journal of data envelopment analysis 0
mohammad khodamoradi department of statistics, science and research branch, islamic azad university, tehran, iran. mohammad-hasan behzadi department of statistics, science and research branch, islamic azad university, tehran, iran. mohsen rostamy-malekhalifeh department of mathematics, science and research branch, islamic azad university, tehran, iran.

evaluating of staff’s performance and accessing to optimized performance in an organization will be possible by creating factors such as job satisfaction and organizational commitment. in this paper, data envelope analysis (dea) was used in order to evaluate staffs’ performance in khuzestan oxin steel company. also, a questionnaire was used in order to collect necessary data and information (cr...

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