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An analytical model for heat capacity determination based on energy conservation to obtain the heating/cooling temperature profiles of a film-substrate system is discussed. The proposed model integrates the heat transfer by convection and radiation on films to obtain the temperature profiles such that thermal properties can be obtained from these profiles at room conditions. We demonstrated that the...
We study a priori error estimates of mixed finite element methods for identification distributed parameters. The state and the co-state are discretized by the lowest order Raviart-Thomas mixed finite element spaces and the control is discretized by piecewise constant elements. Then, we construct the mixed finite element discretization for the identification distributed parameters. Furthermore, we...
We present the generation of symbolic expressions of low voltage amplifiers by using nullors equivalents of the transistors (MOSFETs) which include only the dominant parasitic elements in order to make a simplification before generation. That way, a reduced system of nodal equations is formulated which can be solved easily by determinant decision diagrams. The advantage of the proposed method is that...
The quasi-linear van der Pol oscillator subject to parametric excitation applied on its natural frequency is studied. The effect of this parametric excitation is analyzed, regular perturbation theory is used to determine the effect on the resulting frequency of oscillation; phase plane analysis and averaging method are both used to determine the effect on the amplitude of the solution. Having an external...
Electronic tongues (ET) are low cost instruments to real time liquid samples determination. There is a vast field of application for ET (i.e. chemical, pharmaceutical, food and environmental analysis). Main disadvantage of ET is the large amount of data implied in the modeling and calibration process. To overcome this disadvantage an automated Sequential Injection Analysis (SIA) system is implemented...
The non-linear interaction of space charge waves including the amplification in microwave and millimeter wave range in n-InP films, possessing the negative differential conductance phenomenon, is investigated theoretically. Both the amplified signal and the generation of harmonics of the input signal are demonstrated, which are due to non-linear effect of the negative differential resistance. It is...
Endoscopy is a standard imaging modality commonly used in different medical fields like lesion diagnosis in hollow organs or mini-invasive surgery. Meanwhile, endoscopic data suffer from the fact that each image of a video-sequence only corresponds to a small 2D field of view. This paper presents a mosaicing algorithm leading to visually coherent large field of view maps. The ability of the algorithm...
A Sliding Mode (SM) Block Control is proposed to control an Antilock Brake System (ABS). The control problem is to achieve reference tracking for the slip rate, such that, the friction between tyre and road surface is good enough to control the car. The closed-loop system is robust in presence of matched and unmatched perturbations. To show the performance of the proposed control strategy, a simulation...
In the present work, the modeling of a rigid-flexible two link robot via the Euler-Lagrange formalism, is outlined. The flexible-link is considered to be an Euler-Bernoulli beam with a mass attached at its free end simulating a payload. Two control schemes which are known to yield acceptable results for single flexible-link robots are extended and applied to achieve regulation for the joints of the...
Schrödinger equation is a well known example of the so-called complex partial differential equations (C-PDE). This paper presents a technique based in the Differential Neural Networks (DNN) methodology to solve the nonparametric identification problem of systems described by C.PDE. In this case, the identification scheme is proposed as the composition of two coupled DNN: the first one is used to...
We consider the case of a Mobile Ad-Hoc Network (MANET), with nodes that have multiple packet reception (MPR) capability This is done by segmenting the incoming signal in a series of time-overlapping windows, each to be processed by an algorithm that separates each transmitter signal, as suggested in other works We will focus on the effect of varying the overlapping length. In this paper we addressed...
In this work a read out electronics prototype for reconstruction of two-dimensional images based on Field Programmable Gate Arrays (FPGAs) is presented. The front-end includes two main modules, the data acquisition electronics and a hardware architecture for data processing. The read out electronics consists mainly of a Resistive Chain, analog-to-digital converters and a FPGA Virtex IV of the Xilinx's...
An algebraic parameter identification method for, high rate, sampled linear systems is proposed for the output feedback control of a completely unknown DC motor. The parameter estimation method is based on the algebraic methodology (introduced by Fliess and Sira-Ramírez in [1]) for continuous time systems. In this article, we adapt the algebraic parameter identification methodology so that it takes...
This paper describes the use of the electrochemical impedance spectroscopy technique (EIS) in order to establish Electrical Equivalent Circuits to study the corrosion inhibition process of steel in 1.0 M H2SO4 solution at the open circuit potential (OCP). Two ionic liquids derived of Imidazolium with different alkyl chain long, known as Long Chain (LC) and Short Chain (SC), as corrosion inhibitor...
This paper addresses the suppression of mechanical vibrations in a building-like mechanical structure. The suppression is achieved by the application of a piezoelectric patch actuator on the base of the mechanical structure. The overall system is modeled using finite element analysis and validated using experimental modal analysis techniques. The control law used to properly attenuate the mechanical...
The purpose of this work is to compute several image processing techniques, applied to US images of HIFU-induced lesions, to characterize the shape, contour, position and the orientation of thermal lesions. In order to obtain real-time monitoring of HIFU treatment, a B-mode US imaging system and HIFU were synchronized. First, the HIFU sonication procedure consisted of applying an initial power of...
This paper presents a performance evaluation of a new multimodal image registration algorithm which is based on Bayesian estimation theory, specifically on Particle Filters. The results point to an efficient, easy to implement and robust to noise algorithm. The registration method showed good performance when using partial data, and it was compared with an algorithm based on maximization of mutual...
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