نتایج جستجو برای: window length

تعداد نتایج: 366832  

Journal: :مدیریت صنعتی 0
محمدرحیم رمضانیان دانشیارگروه مدیریت، دانشگاه گیلان، رشت، ایران اکرم اویسی عمران کارشناس ارشد مدیریت صنعتی، دانشگاه گیلان، رشت، ایران کیخسرو یاکیده استادیار گروه مدیریت دانشگاه گیلان رشت، ایران

window analysis is a known technique to evaluate performance during the time periods based on data envelopment analysis. in application of window analysis is assumed that efficient frontier have not changed during the periods in the study. unlike the window analysis, malmquist index tries to identify difference between efficient frontiers and separated them. but the means of different frontier ...

Journal: :El Profesional de la Información 2019

2008
D. I. Borisov

In the paper we study the discrete spectrum of a pair of quantum twodimensional waveguides having common boundary in which a window of finite length is cut out. We study the phenomenon of new eigenvalues emerging from the threshold of the essential spectrum when the length of window passes through critical values. We construct the asymptotics expansions for the emerging eigenvalues with respect...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم انسانی و اجتماعی 1394

ایران از جمله کشورهایی است که گسل فراوان دارد و حرکت این گسل ها باعث رها شدن انرزی ذخیره شده و بروز زلزله مکرر می شود.منطقه ی مورد مطالعه قسمتی از استان اذربایجان شرقی است که مهم ترین عارضه ی تکتونیکی موجود در ان ,گسل شمال تبریز می باشد.تصاویر اپتیکی یا انعکاسی را می توان با مدل های split window وmono window و همچنین شواهد ژئومورفولوژی به همراه تشخیص بصری جهت شناسایی گسل های فعال استفاده نمودیم...

Journal: :Human reproduction 2007
M J Keulers C J C M Hamilton A Franx J L H Evers R S G M Bots

BACKGROUND The period in each menstrual cycle during which sexual intercourse can result in conception is called the "fertile window". Although the fertile window closes on the day of ovulation, little is known about the moment it opens. We defined the first day of normal sperm-mucus interaction as the opening of the fertile window. We hypothesized that length of the fertile window varies betwe...

Journal: :EURASIP J. Wireless Comm. and Networking 2014
Liaoyuan Zeng Sean McGrath Guanghui Liu

A critical objective of cognitive radio (CR) system is to enhance the spectrum efficiency, and one of the key factors that can determine the spectrum efficiency is the system spectrum sensing performance with respect to sensing window length. For non-coherent detection-based sensing technique, the length of the sensing window required to meet the detection criteria is inversely proportional to ...

2013
Milan Žukovič

We study the dynamics of the linear and non-linear serial dependencies in financial time series in a rolling window framework. In particular, we focus on the detection of episodes of statistically significant twoand three-point correlations in the returns of several leading currency exchange rates that could offer some potential for their predictability. We employ a rolling window approach in o...

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