The investigation of a reaction-diffusion system with new nonlinear reactions kinetics to model the fermentation of wine is presented. The reactive part extends existing ordinary differential models by taking into account oxygen availability and ethanol toxicity. The presence of spatial diffusion and the inclusion of a heat equation allow geometrical and thermal effects in the model. Existence,...

The behavior of arrays of coupled oscillators has been previously studied by computational solution of a set of nonlinear differential equations describing the time dependence of each oscillator in the presence of signals coupled from neighboring oscillators. The equations are sufficiently complicated in that intuitive understanding of the phenomena which arise is exceedingly difficult. We prop...

A single-supply 5V preamplifier IC for magnetoresistive (MR) read element tape drive is described. The IC incorporates six independent read amplifiers, and four independent write drivers. The read amplifier is a fully differential current sense circuit. MR bias current direction steering is incorporated without additional switches in the signal path. In addition the IC incorporates a voltage re...

the car safety is important for sustainable development of contemporary automobile industry, the researches of the automotive active and passive safety have been universal concern and attention, when the vehicle frontal collision occurred, and the steering wheel and rigid steering column is the main components to make the driver be injured.Based on the extensive collection of home and abroad re...

Visual computational steering environments extend traditional visualization environments by enabling the user to interactively steer the computations applied to the data. In this paper, we develop a new type of computational steering. “Resource steering” extends current visual steering techniques by providing machine resource estimation and control to the user. With resource steering, the user ...

The use of computational steering for smog prediction is described. This application is representative for many underlying issues found in steering high performance applications: high computing times, large data sets, and many di erent input parameters. After a short description of the smog prediction model, its visualization and steering are described. The amount of computation needed to solve...

We consider the problemof reconfiguringthe joints of a redundant robot driven only through end-effector velocity commands. Dependingon the chosen kinematic inversion scheme, this system behavior is subject to differential constraints that may be integrableor not. An analogy is established with non-holonomic systems, allowing the use of existing techniques to designcartesianinputs that bring the...

The paper addresses the problem of vehicle rollover avoidance using reference governors applied to modify the driver steering input in vehicles with an active steering system. Several reference governor designs are presented and tested with a detailed nonlinear simulation model. The vehicle dynamics are highly nonlinear for large steering angles, including the conditions where the vehicle appro...

In today’s world, the effectiveness of electronic active control systems in stabilizing a vehicle’s motion has been recognized; thus, numerous active control systems have been developed to realize effective braking torque and traction control and have been incorporated in mass-produced vehicles. However, an effective active control system for steering is not yet available. Active front steering...

according to high costs of phase shifters in antenna arrays, new methods for beam steering without phase shifter were introduced. frequency diverse array (fda) concept is another approach to beam steering problem. in this structure, the subsequent antenna elements are fed with stepped discrete frequencies causing continuous scanning of space in time. so a range-angle dependent scanning is made ...