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In this paper, we have presented a mathematical modelling of a context-aware system used in smart home based on Boolean control networks. This modelling describes the relationship between the context elements and services, which is effective to logical inference.
Autonomous Underwater Vehicles (AUVs) are Unmanned Underwater Vehicles (UUVs) that are able to function without direct control from a human operator. Consequently, they have a wide range of applications from scientific research of the oceans to military applications such as maritime surveillance. However, there is now the demand for AUVs to be operated within a multi-vehicle scenario to allow large...
In this paper, a novel device structure for the memristor with two active layers and it's nonlinear ionic drift model is presented. We developed the mathematical model using modified nonlinear Joglekar window functions and translated into a compact SPICE model for the proposed memristor. The SPICE simulation results show significant improvement in the memristor ROFF/RON ratio, switching speed, saturation...
In this paper, a new structure for memristor with two active layers of TiO2 and its linear ions drift model has been proposed. Simulation results show significant improvement in the memristor ROFF/RON ratio as compared to single active layer HP lab (conventional) memristor. As a result, switching speed and noise margin of the proposed memristor will be far better than the conventional memristor. With...
Process gases are high temperature by-products of many processes in copper metallurgy. They are heavily dusted and contain combustible components. The basic element in its treatment system is a post combustion chamber localized directly behind the technological furnace. This chamber permits combusting combustible components and precooling the gases with the aid of cooling water and air. Analysis of...
A fluid-mechanics model that make use of asymptotic analysis based on small aspect ratio of capillaries has been compared with the full 3-D set of the N.-St. equations, for modelling the fabrication of capillary tubes. The final asymptotic equations are solved numerically and then compared with the N.-St. solutions, obtained with a commercial finite elements solver. The present paper focuses on the...
In this paper, a mathematical modelling and numerical simulation of the thermal behaviour of the paraffin slurry in a vertical rectangular channel are presented. A continuum model has been developed taking into account the energy balances of the phase change material (PCM) solid particles and the mixture as well to describe the temperature distribution and the local heat exchange between the slurry...
This paper presents the mathematical model of a variable frequency variable voltage sinusoidal pulse width modulated (SPWM) signal and implementation of the same on microcontroller based embedded system. The mathematical model is based on the step function. The implementation of the mathematical model on P89LPC9221 microcontroller based embedded system is described. The analysis is validated by simulation...
Arbovirus constitutes a group of virus that is transmitted by arthropod's bites. Examples of diseases produced by this kind of virus are Dengue, Yellow Fever, and West Nile Virus, among others. These diseases are a major health problem in the world. In this work we formulate a system of differential equations to study the dynamics of an infection produced by arbovirus. For this, we consider the population...
This paper introduces a method for calculating steady-state processes in a three-phase matrix-reactance frequency converters (MRFC) that are described by nonstationary periodical differential equations. An approximation of the solution is based on the use Galerkin's method and an extension of differential equations of one variable of time to equations of two variables of time. The results of calculations...
This paper presents a procedure for mathematical modelling of ring electric power systems for simulation of both transient and steady-state conditions. The idea of this procedure has been based on nodal voltages technique and on differentiation of Kirchhoff's current law (KCL) applied to each non-reference node of the system, the result of which a system of algebraic equations for nodal voltages has...
This study investigates numerically the atomization process occurring in a plain jet airblast atomizer. The population balance equation is solved for the dispersed phase coupled with a CFD Eulerian multi-fluid model. The Sauter mean diameter values obtained numerically compare favorably with previous experimental data only at certain flow conditions. Finally, this study proposes some enhancements...
The objective of this research was to study the following fermentation variables in a batch bioreactor of (a) ethanol concentration of 4, 6, and 8 percent by weight per volume, (b) inoculum concentration of 5, 7.5, 10 and 15 percent, (c) aeration rate of 0.47, and 0.76 volume of air flow rate per minute per volume of substrate, (d) agitation rate of 200, 250, 300 rotations per minute, and (e) fermentation...
The electrodynamic models of scattered fields of moving inhomogeneous weakly ionized plasma media are based on the study of its gas dynamic and plasma physical properties. The solution of different radio physical (radar) problems requires the determination of the electron density distribution over jet volume. Such distributions have been obtained by the help of presented in this paper full and simplified...
This paper presents the formulation, modelling and analysis of network traffic for the purpose of designing an edge router, catering for a large campus. Presuming packet arrival from Poissonpsilas process, and departure or service time distribution to be exponential, a Markov model has been developed. The stochastic characteristics of the traffic has been monitored and studied over long durations...
The paper deals with the mathematical modelling of electrical drives employing polyphase permanent magnet synchronous machines. One focus is the prediction of model parameters like flux linkages, inductances etc. by means of two- dimensional analytical field analysis. Thus the complex model is based exclusively on geometrical and material data of the PMSM. Another focus is the transparent validation...
Various impacts of the combustion process parameters on SO/sub 3/ generation in the steam generator furnace of the 210 MW oil-fired power plant Sisak have been studied by using mathematical modelling via the FLUENT/sup TM/ software package. The results of the simulation show that the excess combustion air of 1.07-1.10 cannot be decreased without modification of other combustion parameters because...
Previous studies have traditionally taken the systemic arterial and venous pulse waves as the input signals responsible for the generation of the intracranial pulse wave (ICPW). The ICPW, however, depends not only on the input pressure waves but also on the filtering effect of the vessel wall. Intraluminal-to-extravascular pressure pulse transmission was studied in a system which consisted of a single...
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