نتایج جستجو برای: density function theory

تعداد نتایج: 2204479  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشگاه پیام نور مرکز تهران - دانشکده علوم پایه 1387

چکیده ندارد.

Journal: :iranian journal of science and technology (sciences) 2012
m. jafari

in the present work, the electronic properties of titanium were studied in three phases of α, β and ω using the density function theory (dft). the full potential augmented plane wave plus local orbital (flapw+lo) method was applied using the generalized gradient approximation. the calculated total energies showed that omega phase was more stable than the two other phases. the largest electrical...

Journal: :international journal of nano dimension 0
razieh habibpour department of chemical technologies, iranian research organization for science and technology, p.o. box 3353-5111, tehran, i. r. iran. raheleh vaziri department of chemistry, payame noor university, p.o. box 19395-3697, tehran , i. r. iran.سازمان اصلی تایید شده: دانشگاه پیام نور تهران (payame noor university)

in this study, the structures, the ir spectroscopy, and the electronic properties of auncum (n+m≤5) bimetallic clusters were studied and compared with those of pure gold and copper clusters using the generalized gradient approximation (gga) and exchange correlation density functional theory (dft). the study of an o2-auncum system is important to identify the promotion effects of each of the two...

Journal: :physical chemistry research 0
mahmood moradi physics department, college of science, shiraz university, shiraz, iran bahareh binaei ghotbabadi physics department, college of sciences, shiraz university, shiraz 71454, iran

the density and polarization profiles of the dipolar hard ellipsoids confined between hard walls are studied using the density functional theory (dft). the hyper-netted chain (hnc) approximation is used to write excess grand potential of the system with respect to the bulk value. the number density is expanded up to zero and first order in polarization to find the results. for the zero order in...

ژورنال: پژوهش های ریاضی 2016
Bahrami , V, Dostmoradi , A, Zadkarami , M,

Failure rate is one of the important concepts in reliability theory. In this paper, we introduce a new distribution function containing four parameters based on inverse Weibull distribution. This new distribution has a more general form of failure rate function. It is able to model five ageing classes of life distributions with appropriate choice of parameter values so that it is displayed decr...

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