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Mathias Muia

Publications and source records attributed to Mathias Muia.

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Generalization error property of infoGAN for two-layer neural network

Information Maximizing Generative Adversarial Network (infoGAN) can be understood as a minimax problem involving two neural networks: discriminators and generators with mutual information functions. The infoGAN incorporates various components, including latent variables, mutual information, and objective function. This research demonstrates the Generalization error property of infoGAN as the discriminator and generator sample size approaches infinity. This research explores the generalization error property of InfoGAN as the sample sizes of the discriminator and generator approach infinity. To establish this property, the study considers the difference between the empirical and population versions of the objective function. The error bound is derived from the Rademacher complexity of the discriminator and generator function classes. Additionally, the bound is proven for a two-layer network, where both the discriminator and generator utilize Lipschitz and non-decreasing activation functions.

stat.ML

ARMA Model Development and Analysis for Global Temperature Uncertainty

Temperature uncertainty models for land and sea surfaces can be developed based on statistical methods. In this paper, we developed a novel time series temperature uncertainty model which is the Auto-regressive Moving Average (ARMA)(1, 1) model. The model was developed for observed annual mean temperature anomaly X(t) which is a combination of true (latent) global anomaly Y (t) for a year (t) and normal variable w(t). The uncertainty is taken as the variance of w(t) which was decomposed to Land Surface Temperature (LST) uncertainty, Sea Surface Temperature (SST) uncertainty, and the corresponding source of uncertainty. The ARMA model was analyzed and compared with Auto-regressive (AR), and Auto-regressive integrated moving average (ARIMA) for the data taken from NASA, Goddard Institute for space studies Surface Temperature Analysis. The statistical analysis of the Auto-correlation function (ACF), Partial auto-correlation function (PACF), Normal quantile-quantile (Normal Q-Q) plot, the density of the residuals, and variance of normal variable w(t) show that ARMA(1, 1)is better than AR(1) and ARIMA(1, d, 1) for d = 1, 2.

stat.ME