855 research outputs found
Understanding Generalization via Set Theory
Generalization is at the core of machine learning models. However, the
definition of generalization is not entirely clear. We employ set theory to
introduce the concepts of algorithms, hypotheses, and dataset generalization.
We analyze the properties of dataset generalization and prove a theorem on
surrogate generalization procedures. This theorem leads to our generalization
method. Through a generalization experiment on the MNIST dataset, we obtain
13,541 sample bases. When we use the entire training set to evaluate the
model's performance, the models achieve an accuracy of 99.945%. However, if we
shift the sample bases or modify the neural network structure, the performance
experiences a significant decline. We also identify consistently mispredicted
samples and find that they are all challenging examples. The experiments
substantiated the accuracy of the generalization definition and the
effectiveness of the proposed methods. Both the set-theoretic deduction and the
experiments help us better understand generalization.Comment: 14 page
Single-realization recovery of a random Schr\"odinger equation with unknown source and potential
In this paper, we study an inverse scattering problem associated with the
stationary Schr\"odinger equation where both the potential and the source terms
are unknown. The source term is assumed to be a generalised Gaussian random
distribution of the microlocally isotropic type, whereas the potential function
is assumed to be deterministic. The well-posedness of the forward scattering
problem is first established in a proper sense. It is then proved that the
rough strength of the random source can be uniquely recovered, independent of
the unknown potential, by a single realisation of the passive scattering
measurement. We develop novel techniques to completely remove a restrictive
geometric condition in our earlier study [25], at an unobjectionable cost of
requiring the unknown potential to be deterministic. The ergodicity is used to
establish the single realization recovery, and the asymptotic arguments in our
analysis are based on techniques from the theory of pseudo-differential
operators and the stationary phase principle.Comment: 28 page
L'expérience de la fragilité et de l'instabilité de la relation interpersonnelle en performance
Mon travail de création à la maîtrise s'est principalement développé autour de la question des relations interpersonnelles dans une pratique de la performance. J'y interroge la fragilité et l'instabilité des relations que nous entretenons avec les autres par le biais de propositions artistiques m'amenant à partager des expériences de rencontre avec les spectateurs. Ce texte présente le processus de création du travail artistique en retraçant le chemin de mes inspirations et l'émergence d'une conception personnelle de la relation à l'autre. J'y explique aussi le choix de la performance comme moyen d'expression artistique. Ce texte est divisé en trois parties qui permettent d'illustrer mes réflexions sur mon travail. Plus précisément, je spécifierai pourquoi et comment je réalise mon projet artistique sur ce thème subtil de la relation
- …