نتایج جستجو برای: linear tomography

تعداد نتایج: 659871  

Journal: :Geophysical Journal International 1993

A.-R. Zirak, M. Khademi, M.-S. Mahloji,

We present an efficient method for the reduction of model equations in the linearized diffuse optical tomography (DOT) problem. We first implement the maximum a posteriori (MAP) estimator and Tikhonov regularization, which are based on applying preconditioners to linear perturbation equations. For model reduction, the precondition is split into two parts: the principal components are consid...

Journal: :Geophysical Journal International 1997

Journal: :dental research journal 0
zahra dalili kajan ali khalighi sigaroudi majedeh mohebbi

background: tonsilloliths are calcified concretions that develop in tonsillar crypts. they are usually small and asymptomatic, so they are found accidentally during routine dental radiogrphy procedure. large tonsilloliths can occur with clinical signs and symptoms. the purpose of this study was to evaluate the prevalence and patterns of palatine and adenoid tonsilloliths in cone‑beam computed t...

پایان نامه :0 1392

nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1386

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