نتایج جستجو برای: 40 n and long 44
تعداد نتایج: 17097299 فیلتر نتایج به سال:
when we return to the concept of poetry and the age-old discussion about the uselessness or the usefulness of the poets to the private and public state of human beings, originating from plato and aristotles views about poets respectively, there emerges the question of the role of poetry in human beings lives. in the same manner, with the advance of technology and the daily progress and improvem...
nonalcoholic fatty liver disease (nafld) is increasing in pediatric age group parallel to the growing prevalence of obesity and overweight all around the world. so changing in life style and interventions on obesogenic environment is cornerstone of nafld therapy in obese children. some experts recommend that children and adolescents be encouraged to follow a low-fat, low-glycemic-index diet t...
abstract: in the paper of black and scholes (1973) a closed form solution for the price of a european option is derived . as extension to the black and scholes model with constant volatility, option pricing model with time varying volatility have been suggested within the frame work of generalized autoregressive conditional heteroskedasticity (garch) . these processes can explain a number of em...
فولادهای تولاکس آخرین محصول شرکت فولادسازی اس. اس. ای. بی. در سوئیس هستند. این شرکت در سال های قبل فولادهای پراستفاده دیگری مانند هاردآکس[i] را که یک فولاد ضدسایش متداول در صنعت است را نیز تولید و روانه بازار کرده است. فولادهای تولاکس با هدف جایگزینی فولادهای متداول مورد استفاده در صنعت ماشین سازی ساخته شده اند. فولادهای تولاکس در سه دسته تولاکس 33، تولاکس 40 و تولاکس 44 ساخته و روانه بازار شده...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
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