« école de 1650 », une école préclassique ?

École doctorale de l ' école Polytechnique Thèse

This chapter is dedicated to the de nition of relevant sets of shapes and that of de ning a metric on them. Following a recent research monograph by Delfour and Zolesio [33], we consider the characteristic functions of the subsets of R2 and their distance functions. The L2 norm of the di erence of characteristic functions, the L∞ and the W 1,2 norms of the di erence of distance functions de ne ...

École Normale Supérieure de Lyon

In this paper, an eecient algorithm to simultaneously implement array alignment and data/computation distribution is introduced and evaluated. We re-visit previous work of Li and Chen 13, 14], and we show that their alignment step should not be conducted without preserving the potential parallelism. In other words, the optimal alignment may well sequentialize computations, whatever the distribu...

École Normale Supérieure de Lyon

Thèse de doctorat de l ’ École Polytechnique

In this work, three surface functionalization processes have been studied: the spontaneous grafting fromdiazonium salts, the chemically induced grafting from diazonium salts and the chemically induced graftingfrom diazonium salts in presence of vinylic monomers (which is Graftfast). These processes work at roomtemperature, atmospheric pressure, in aqueous medium and without any ext...

École Polytechnique

This report presents quantum walks which are the quantum counterparts of classical random walks. Quantum walks are first defined on general graphs and the possibility of very different behavior between a classical random walk and its quantum analogue is illustrated with a simple graph. A generalization of the quantum walk protocol for a particle in a one-dimensional chain, by using several type...

Thèse De Doctorat De L ’ École Normale Supérieure

The classical structure of an Opto-Electronic Oscillator (OEO) is based on a long fiber loop actingas a delay line and leading to the high spectral purity, or very low phase noise, of the oscillator. Such an OEOhas been developed in SATIE/LPQM laboratory at ENS Cachan, operating at 8 GHz frequency. However,this system has some main disadvantages such as a bulky size, the difficulty ...