https://puma.ub.uni-stuttgart.de/group/simtech/physics-informedPUMA RSS feed for /group/simtech/physics-informed2026-04-22T12:54:22+02:00https://puma.ub.uni-stuttgart.de/bibtex/20252f0b3fb5a37ee4a3c234a3791b9f3/lmandllmandl2023-10-23T11:04:28+02:00qualiperf rg-ml neural-network myown hybrid-mor simliva machine-learning atlas isd physics-informed <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Luis Mandl" itemprop="url" href="/person/18596788f2da4f14c756f36923e0be9f2/author/0"><span itemprop="name">L. Mandl</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="André Mielke" itemprop="url" href="/person/18596788f2da4f14c756f36923e0be9f2/author/1"><span itemprop="name">A. Mielke</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Seyed Morteza Seyedpour" itemprop="url" href="/person/18596788f2da4f14c756f36923e0be9f2/author/2"><span itemprop="name">S. Seyedpour</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tim Ricken" itemprop="url" href="/person/18596788f2da4f14c756f36923e0be9f2/author/3"><span itemprop="name">T. Ricken</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Scientific Reports</span>, </em> </span>(<em><span>Sep 20, 2023<meta content="Sep 20, 2023" itemprop="datePublished"/></span></em>)</span>Mon Oct 23 11:04:28 CEST 2023Scientific Reports0915566Affine transformations accelerate the training of physics-informed neural networks of a one-dimensional consolidation problem132023qualiperf rg-ml neural-network myown hybrid-mor simliva machine-learning atlas isd physics-informed 20Physics-informed neural networks (PINNs) leverage data and knowledge about a problem. They provide a nonnumerical pathway to solving partial differential equations by expressing the field solution as an artificial neural network. This approach has been applied successfully to various types of differential equations. A major area of research on PINNs is the application to coupled partial differential equations in particular, and a general breakthrough is still lacking. In coupled equations, the optimization operates in a critical conflict between boundary conditions and the underlying equations, which often requires either many iterations or complex schemes to avoid trivial solutions and to achieve convergence. We provide empirical evidence for the mitigation of bad initial conditioning in PINNs for solving one-dimensional consolidation problems of porous media through the introduction of affine transformations after the classical output layer of artificial neural network architectures, effectively accelerating the training process. These affine physics-informed neural networks (AfPINNs) then produce nontrivial and accurate field solutions even in parameter spaces with diverging orders of magnitude. On average, AfPINNs show the ability to improve the {\$}{\$}{\{}{\backslash}mathscr {\{}L{\}}{\}}{\_}2{\$}{\$}relative error by {\$}{\$}64.84{\backslash}{\%}{\$}{\$}after 25,000 epochs for a one-dimensional consolidation problem based on Biot's theory, and an average improvement by {\$}{\$}58.80{\backslash}{\%}{\$}{\$}with a transfer approach to the theory of porous media.