6 research outputs found
Error correcting code using tree-like multilayer perceptron
An error correcting code using a tree-like multilayer perceptron is proposed.
An original message \mbi{s}^0 is encoded into a codeword \boldmath{y}_0
using a tree-like committee machine (committee tree) or a tree-like parity
machine (parity tree). Based on these architectures, several schemes featuring
monotonic or non-monotonic units are introduced. The codeword \mbi{y}_0 is
then transmitted via a Binary Asymmetric Channel (BAC) where it is corrupted by
noise. The analytical performance of these schemes is investigated using the
replica method of statistical mechanics. Under some specific conditions, some
of the proposed schemes are shown to saturate the Shannon bound at the infinite
codeword length limit. The influence of the monotonicity of the units on the
performance is also discussed.Comment: 23 pages, 3 figures, Content has been extended and revise
Statistical mechanics of lossy compression for non-monotonic multilayer perceptrons
A lossy data compression scheme for uniformly biased Boolean messages is
investigated via statistical mechanics techniques. We utilize tree-like
committee machine (committee tree) and tree-like parity machine (parity tree)
whose transfer functions are non-monotonic. The scheme performance at the
infinite code length limit is analyzed using the replica method. Both committee
and parity treelike networks are shown to saturate the Shannon bound. The AT
stability of the Replica Symmetric solution is analyzed, and the tuning of the
non-monotonic transfer function is also discussed.Comment: 29 pages, 7 figure
Jeanne politique: La réception du mythe de Voltaire aux Femen
International audienceJeanne d’Arc, figure sans visage aux cent visages, est une « légende vivante » (Michelet) dont napoléon et Schiller ont fait l’incarnation de la nation en armes, un symbole depuis lors sans cesse revivifié autant que martyrisé par les médiations historiographiques, littéraires, filmiques, populaires ou commerciales et les factions militantes qui s’en disputent l’héritage. Ce parcours de météore alliant la jeunesse, le charisme, l’intrépidité à une mort précoce et imméritée, la gloire à la déréliction, fascine autant qu’il dérange.Cet ouvrage analyse comment le mythe s’est forgé et a évolué au cours des siècles jusqu’à aujourd’hui, à travers des réalisations artistiques, des manifestations publiques, des prises de positions politiques ou idéologiques, oscillant entre hommage et satire, panégyrique et stigmatisation, récupération et déconstruction