Moments of the measure defined by products of random deviates are considered with the aim of reproducing the multifractal spectrum of the DiffusionLimited Aggregation (DLA) . appeared in: Journal of Technical Physics 37 (1996), pp.441-444 In 1981 Witten and Sander have proposed the Diffusion-Limited Aggregation (DLA) model [1] leading to the formation of fractal patterns. The growth process of ...

in recent years, there has been a fast growth in wind energy conversion system (wecs). there are two general types of wind turbines in wecs: fixed speed wind turbines and varying speed wind turbines.permanent magnet synchronous generator (pmsg) is one of the most attractive generators for the varying speed turbine wecs.in this paper, a fuzzy controller is proposed to control the current source ...

We investigate the effects of noise in drive and/or response systems on generalized synchronization. We show numerically that noise in a drive system can induce synchronization in an unidirectionally coupled Lorenz system, while noise in a response system disrupts the synchronization. In addition, through experiments using coupled semiconductor lasers with optical feedback, we observe that nois...

Different recovery mechanisms are activated during the production from reservoirs. Wells sometimes are kept with the injection. Therefore the evaluation of injection indices depended on material injection, seems to be necessary. This study is going to determine the drive indices for a reservoir by making a model using Eclipse. The model consists a gas cap and aquifer, in which there is an injec...

In this research paper, the performance of an air-cored axial flux permanent magnet synchronous generator is evaluated for low speed, direct drive applications using 3D finite element modeling and experimental tests. The structure of the considered machine consists of double rotor and coreless stator, which results in the absence of core losses, reduction of stator weight and elimination of cog...

this paper presents a gain scheduled autopilot for pitch channel of a flying vehicle. the selected method is based on polynomial fuzzy systems. the method does not involve linearization about operating point. first the polynomial fuzzy model of pitch channel of the flight body is derived. next, using polynomial fuzzy system methodology the controller is design such that the outputs of the nonli...

this paper presents fuzzy and conventional performance of model reference adaptive control(mrac) to control a dc drive. the aims of this work are achieving better match of motor speed with reference speed, decrease of noises under load changes and disturbances, and increase of system stability. the operation of nonadaptive control and the model reference of fuzzy and conventional adaptive contr...