We propose to use the modern technique of the F-transform in order to show that it can be successfully applied to the image fusion. We remind two working algorithms (SA-the simple algorithm, and CA-the complete algori...
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We propose to use the modern technique of the F-transform in order to show that it can be successfully applied to the image fusion. We remind two working algorithms (SA-the simple algorithm, and CA-the complete algorithm) which are based on the F-transform and discuss, how they can be improved. We propose a new algorithm (ESA-the enhanced simple algorithm) which is effective in time and free of frequently encountered shortcomings.
Numerical simulation model for unsteady aluminum profile extrusion processes is built using Euler mesh and finite volume method (FVM), and the related key technologies are studied. Velocity and pressure fields are obt...
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Numerical simulation model for unsteady aluminum profile extrusion processes is built using Euler mesh and finite volume method (FVM), and the related key technologies are studied. Velocity and pressure fields are obtained iteratively by simple algorithm. Temperature and equivalent strain rate fields calculated according to velocity field are used to update the dynamic viscosity coefficient associated with the constitutive equations for hot extrusion of aluminum profile. VOF (volume of fluid) method is included to trace material flow front. The 'moving grids system' is introduced to treat boundaries moving problem of the calculated area caused by the moving extrusion ram. The auto-adjustment of the time increment is realized to ensure the stability and efficiency of the simulation. The program was developed, typical extrusion processes were simulated, and the exactness of the FVM model built in the program is proved.
In this paper, the laminar heat transfer of natural convection on vertical surfaces is investigated. Most of the studies on natural convection have been considered constantly whereas velocity and temperature domain, d...
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In this paper, the laminar heat transfer of natural convection on vertical surfaces is investigated. Most of the studies on natural convection have been considered constantly whereas velocity and temperature domain, do not change with time, transient one are used a lot. Governing equations are solved using a finite volume ap- proach. The convective terms are discretized using the power-law scheme, whereas for diffusive terms the central difference is employed. Coupling between the velocity and pressure is made with simple algorithm. The resultant system of discretized linear algebraic equations is solved with an alternating direction implicit scheme. Then a configuration of rectangular fins is put in different ways on the surface and heat transfer of natural convection on these surfaces without sliding is studied and finally optimization is investigated.
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