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Troyes, France

The University of Technology of Troyes is a French university, in the Academy of Reims. The UTT is part of the network of the three universities of technology, found by the University of Technology of Compiègne. Inspired by the American University of Pennsylvania in Philadelphia, these three universities are a French mixture between the universities of this country and its schools of engineers . They are indeed organized like the universities, temples of knowledge being based on the triptych teaching-research-valorization . Their teaching model is a mix between the North-American model and the French traditions: courses choice, separation of the courses, work directed and practical work . These three universities give thus an engineering degree equivalent to the Bac+5 formations of the French Grandes Ecoles. The UTT was founded in 1994 and inaugurated by Jacques Chirac. One of the first chairman of the university has been Thierry Breton , honorary Chairman of both Thomson and France Telecom, and former finance Minister from France. Wikipedia.


Barchiesi D.,University of Technology of Troyes
Optics Express | Year: 2012

The inverse problem for Surface Plasmon Resonance measurements [1] on a thin layer of aluminium in the Kretschmann configuration, is solved with a Particle Swarm Optimization method. The optical indexes as well as the geometrical parameters are found for the best fit of the experimental reflection coefficient in s and p polarization, for four samples, under three theoretical hypothesis on materials: the metal layer is pure, melted with its oxyde, or coated with oxyde. The influence of the thickness of the metal layer on its optical properties is then investigated. © 2012 Optical Society of America. Source


Vial A.,University of Technology of Troyes
European Journal of Physics | Year: 2012

We present an approximate solution for the downward time of travel in the case of a mass falling with a linear drag force. We show how a quasi-analytical solution implying the Lambert function can be found. We also show that solving the previous problem is equivalent to the search for Wien's displacement law. These results can be of interest for undergraduate students, as they show that some transcendental equations found in physics may be solved without purely numerical methods. Moreover, as will be seen in the case of Wien's displacement law, solutions based on series expansion can be very accurate even with few terms. © 2012 IOP Publishing Ltd. Source


Barchiesi D.,University of Technology of Troyes
European Journal of Physics | Year: 2012

Surface plasmon resonance, also called the surface plasmon polariton, is an attractive illustration of basic electromagnetism. The investigation of this phenomenon in textbooks is often confusing for undergraduate students. The link between classical concepts of resonance and the solution of the problem is proposed in this work to clarify the procedure. The relationship with the course of solid state physics is proposed using the dispersion curves. The experimental setups are also mentioned. © 2012 IOP Publishing Ltd. Source


Honeine P.,University of Technology of Troyes
IEEE Transactions on Pattern Analysis and Machine Intelligence | Year: 2012

Kernel principal component analysis (kernel-PCA) is an elegant nonlinear extension of one of the most used data analysis and dimensionality reduction techniques, the principal component analysis. In this paper, we propose an online algorithm for kernel-PCA. To this end, we examine a kernel-based version of Oja's rule, initially put forward to extract a linear principal axe. As with most kernel-based machines, the model order equals the number of available observations. To provide an online scheme, we propose to control the model order. We discuss theoretical results, such as an upper bound on the error of approximating the principal functions with the reduced-order model. We derive a recursive algorithm to discover the first principal axis, and extend it to multiple axes. Experimental results demonstrate the effectiveness of the proposed approach, both on synthetic data set and on images of handwritten digits, with comparison to classical kernel-PCA and iterative kernel-PCA. © 2012 IEEE. Source


A method for monitoring a degradation in an on-board device of an aircraft, comprising a step of comparing an abnormality score obtained for a given flight of said aircraft with a decision threshold (S) and a step of transmitting an alert in the event of said decision threshold (S) being exceeded, said decision threshold (S) being automatically determined for a given probability of alert Pa, corresponding to the probability of an alert being transmitted during the monitoring method when said on-board device is healthy, by means of a plurality of steps, including a step of reading the antecedent of the continuous adjusted division function for the value 1Peac, said antecedent corresponding to said decision threshold (S), with Peac being the elementary probability of exceeding the threshold for confirmation per k exceedances of threshold during n consecutive flights and being a function of the probability of alert Pa.

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