Zobrazeno 1 - 10
of 349
pro vyhledávání: '"Wegkamp, A."'
Mixed multinomial logits are discrete mixtures introduced several decades ago to model the probability of choosing an attribute from $p$ possible candidates, in heterogeneous populations. The model has recently attracted attention in the AI literatur
Externí odkaz:
http://arxiv.org/abs/2409.09903
Linear Discriminant Analysis (LDA) is an important classification approach. Its simple linear form makes it easy to interpret and it is capable to handle multi-class responses. It is closely related to other classical multivariate statistical techniq
Externí odkaz:
http://arxiv.org/abs/2402.14260
Autor:
Bing, Xin, Wegkamp, Marten
This paper considers binary classification of high-dimensional features under a postulated model with a low-dimensional latent Gaussian mixture structure and non-vanishing noise. A generalized least squares estimator is used to estimate the direction
Externí odkaz:
http://arxiv.org/abs/2210.14347
Autor:
Bing, Xin, Wegkamp, Marten
In high-dimensional classification problems, a commonly used approach is to first project the high-dimensional features into a lower dimensional space, and base the classification on the resulting lower dimensional projections. In this paper, we form
Externí odkaz:
http://arxiv.org/abs/2210.12862
Autor:
Jana Gerlach, Vanessa Beutel, Carsten Wegkamp, Michael H. Breitner, Stefan Geißendörfer, Bernd Engel, Karsten von Maydell
Publikováno v:
Heliyon, Vol 10, Iss 5, Pp e27643- (2024)
The provision of ancillary services (AS) is subject to changes associated with the energy transition. Due to new requirements, the power supply quality, reliability, and safety must be achieved by simultaneously complying with technological, economic
Externí odkaz:
https://doaj.org/article/6c3d026fd4c74ec09ceb2d37022b4572
This paper studies the estimation of high-dimensional, discrete, possibly sparse, mixture models in topic models. The data consists of observed multinomial counts of $p$ words across $n$ independent documents. In topic models, the $p\times n$ expecte
Externí odkaz:
http://arxiv.org/abs/2107.05766
Autor:
Gerlach, Jana, Beutel, Vanessa, Wegkamp, Carsten, Breitner, Michael H., Geißendörfer, Stefan, Engel, Bernd, von Maydell, Karsten
Publikováno v:
In Heliyon 15 March 2024 10(5)
Detecting approximate replicate components of a high-dimensional random vector with latent structure
High-dimensional feature vectors are likely to contain sets of measurements that are approximate replicates of one another. In complex applications, or automated data collection, these feature sets are not known a priori, and need to be determined. T
Externí odkaz:
http://arxiv.org/abs/2010.02288
This work is devoted to the finite sample prediction risk analysis of a class of linear predictors of a response $Y\in \mathbb{R}$ from a high-dimensional random vector $X\in \mathbb{R}^p$ when $(X,Y)$ follows a latent factor regression model generat
Externí odkaz:
http://arxiv.org/abs/2007.10050
This work studies finite-sample properties of the risk of the minimum-norm interpolating predictor in high-dimensional regression models. If the effective rank of the covariance matrix $\Sigma$ of the $p$ regression features is much larger than the s
Externí odkaz:
http://arxiv.org/abs/2002.02525