1. Fraunhofer Center for Machine Learning and Fraunhofer Institute for Industrial Mathematics ITWM, Fraunhofer-Platz 1, 67663 Kaiserslautern, Germany
2. Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Erwin-Schrödinger-Straße 44, 67663 Kaiserslautern, Germany
3. Machine Learning Group, Department of Computer Science, TU Kaiserslautern, P.O. Box 3049, 67653 Kaiserslautern, Germany