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تعداد نتایج: 7584734 فیلتر نتایج به سال:
thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...
a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...
Abstract In the study of discrete dynamical systems, we typically start with a function from space into itself, and ask questions about properties sequences iterates function. this paper reverse direction study. particular, restricting to complex plane, sequence numbers functions (if any) for which is an orbit under iteration. This gives rise existence uniqueness. We resolve some questions, sho...
This paper analyzes the return sensitivities of real estate value and growth stocks to changes in five different interest rate proxies. Using a global sample 352 listed companies from 12 countries as test object, we find that are more sensitive than short-term rate. finding is consistent with theory investors shorter investment horizons trade off high initial yield against lower-risk rates. In ...
in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...
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