نتایج جستجو برای: particle method
تعداد نتایج: 1771404 فیلتر نتایج به سال:
In a standard theory of the formation planets in our Solar System, terrestrial and cores gas giants are formed through accretion kilometer-sized objects (planetesimals) protoplanetary disk. Gravitational $N$-body simulations disk system made up numerous planetesimals most direct way to study process. However, use has been limited idealized models (e.g. perfect accretion) and/or narrow spatial r...
This paper combines particle swarm optimization, grid search method and univariate method as a general optimization approach for any type of problems emphasizing on optimum design of steel frame structures. The new algorithm is denoted as the GSU-PSO. This method attempts to decrease the search space and only searches the space near the optimum point. To achieve this aim, the whole search space...
in this work a glass micromodel which its grains and pores are non-uniform in size, shape and distribution is considered as porous medium. a two-dimensional random network model of micromodel with non-uniform pores has been constructed. the non-uniformity of porous model is achieved by assigning parametric distribution functions to pores throat and pores length, which was measured using image a...
In this study, spherical Nb2O5 nanoparticles were synthesized by a novel chemical method as a simple, robust, surfactant-free, non-toxic and widely applicable approach. In order to investigate the effect of initial concentration on particle sizes, nanoparticles with different initial concentration were synthesized. Ultrasonic assisted method was applied and the effects of ultrasonic treat...
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