نتایج جستجو برای: advance current method
تعداد نتایج: 2349886 فیلتر نتایج به سال:
In this paper, we consider a second-order singularly perturbed differential-difference equations with mixed delay and advance parameters. At first, we approximate the model problem by an upwind finite difference scheme on a Shishkin mesh. We know that the upwind scheme is stable and its solution is oscillation free, but it gives lower order of accuracy. So, to increase the convergence, we propo...
In this study, a hybrid intelligent model has been designed to predict groundwater inflow to a mine pit during its advance. Novel hybrid method coupling artificial neural network (ANN) with genetic algorithm (GA) called ANN-GA, was utilised. Ratios of pit depth to aquifer thickness, pit bottom radius to its top radius, inverse of pit advance time and the hydraulic head (HH) in the observation w...
Gliders are new marine vehicles which have research and military uses and they move by sequent diving and climbing. Suitable design of its main body and wings are important for the most advance velocity. hydrodynamic design variables are main body form, wings (cross section, dimensions, shape, longitudinal and vertical position) and hydrostatic parameters (static trim angle, amount of added for...
This paper addresses the active torque ripple compensation of a permanent magnet brushless direct-current motor (PMBLDC) drive with new pulse width modulation (PWM) technique and advance angle method. Torque is well-known problem in BLDC motors which produced by discrepancy between stator current back electromotive force (back-emf) waveforms. The advanced method proposed this generates maximum ...
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