Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2018Identification of the kinetics of the alkaline methanol electro-oxidation reaction by dynamic methods
Haisch, T.; Kubannek, F.; Nikitina, L.; Nikitin, I.; Clees, T.; Krewer, U.
Abstract
2018Making network solvers globally convergent
Clees, Tanja; Nikitin, Igor; Nikitina, Lialia
Konferenzbeitrag
2018Mathematical modeling of electrochemical kinetics of alkaline methanol oxidation
Nikitin, Igor; Clees, Tanja; Nikitina, Lialia; Pott, Sabine; Krewer, Ulrike; Windorfer, Theresa
Abstract
2018Modeling of gas compressors and hierarchical reduction for globally convergent stationary network solvers
Clees, Tanja; Nikitin, Igor; Nikitina, Lialia; Segiet, Lukasz
Zeitschriftenaufsatz
2018Origin of the hysteresis between forward and reverse peak in cyclic voltammograms of the alkaline methanol electrooxidation
Haisch, T.; Kubannek, F.; Nikitina, L.; Nikitin, I.; Pott, S.; Clees, T.; Krewer, U.
Abstract
2018Parameter identification in cyclic voltammetry of alkaline methanol oxidation
Clees, T.; Nikitin, I.; Nikitina, L.; Pott, S.; Krewer, U.; Haisch, T.
Konferenzbeitrag
2018Parameter identification in electrochemical kinetics of alkaline methanol oxidation
Clees, Tanja; Nikitin, Igor; Nikitina, Lialia; Pott, Sabine
Abstract
2018Universal translation algorithm for formulation of transport network problems
Baldin, A.; Cassirer, K.; Clees, T.; Klaassen, B.; Nikitin, I.; Nikitina, L.; Torgovitskaia, I.
Konferenzbeitrag
2017Advanced modeling of gas compressors for globally convergent stationary network solvers
Clees, Tanja; Nikitin, Igor; Nikitina, Lialia
Konferenzbeitrag
2017Algebraic Multigrid: From Academia to Industry
Stüben, Klaus; Ruge, John W.; Clees, Tanja; Gries, Sebastian
Aufsatz in Buch
2017Cooling Circuit Simulation I: Modeling
Clees, Tanja; Hornung, Nils; Lluch, Eric; Nikitin, Igor; Nikitina, Lialia; Torgovitskaia, Inna
Aufsatz in Buch
2017Cooling Circuit Simulation II: A Numerical Example
Clees, Tanja; Hornung, Nils; Labrenz, Detlef; Schnell, Michael; Schwichtenberg, Horst; Shoukourian, Hayk; Torgovitskaia, Inna; Wilde, Torsten
Aufsatz in Buch
2017Electrochemical impedance spectroscopy of alkaline methanol oxidation
Clees, Tanja; Nikitin, Igor; Nikitina, Lialia; Steffes-lai, Daniela; Pott, Sabine; Krewer, Ulrike; Windorfer, Theresa
Konferenzbeitrag
2017River Bed Morphodynamics: Metamodeling, Reliability Analysis, and Visualization in a Virtual Environment
Clees, Tanja; Nikitin, Igor; Nikitina, Lialia; Pott, Sabine; Klimenko, Stanislav
Aufsatz in Buch
2017Systemansätze und -komponenten für cross-sektorale Netze
Doetsch, Christian; Clees, Tanja
Aufsatz in Buch
2016A globally convergent method for generalized resistive systems and its application to stationary problems in gas transport networks
Clees, T.; Hornung, N.; Nikitin, I.; Nikitina, L.
Konferenzbeitrag
2016MYNTS: Multi-phYsics NeTwork Simulator
Clees, Tanja; Cassirer, Kläre; Hornung, Nils; Klaassen, Bernhard; Nikitin, Igor; Nikitina, Lialia; Suter, Robin; Torgovitskaia, Inna
Konferenzbeitrag
2016Parameter studies for energy networks with examples from gas transport
Clees, T.
Konferenzbeitrag
2016RBF-metamodel driven multi-objective optimization and its applications
Clees, Tanja; Hornung, Nils; Nikitin, Igor; Nikitina, Lialia; Steffes-lai, Daniela
Zeitschriftenaufsatz
2015Increasing data center energy efficiency via simulation and optimization of cooling circuits - a practical approach
Wilde, Torsten; Clees, Tanja; Shoukourian, Hayk; Hornung, Nils; Schnell, Michael; Torgovitskaia, Inna; Lluch Alvarez, Eric; Labrenz, Detlef; Schwichtenberg, Horst
Konferenzbeitrag
2015Quasi-Monte Carlo and RBF metamodeling for quantile estimation in river bed morphodynamics
Clees, T.; Nikitin, I.; Nikitina, L.; Pott, S.
Konferenzbeitrag
2015RBF-metamodel Driven Multiobjective Optimization and its Application in Focused Ultrasonic Therapy Planning
Clees, Tanja; Hornung, Nils; Nikitin, Igor; Nikitina, Lialia; Steffes-Lai, Daniela
Konferenzbeitrag
2015Where am I? A Fast Multidimensional Point Location Test and its Applications
Clees, Tanja; Huttemann, Martin; Nikitin, Igor; Nikitina,Lialia; Steffes-Lai, Daniela
Konferenzbeitrag
2014Eine effiziente Methodik für die robuste Optimierung bei der Bauteildimensionierung
Rhein, Beate; Ruschitzka, Margot; Clees, Tanja
Zeitschriftenaufsatz
2014Entwicklung einer numerischen Methode zur Berücksichtigung stochastischer Effekte für die Crashsimulation von Punktschweißverbindungen
Sommer, S.; Stefes-lai, D.; Clees, T.
Bericht
2014Focused ultrasonic therapy planning: Metamodeling, optimization, visualization
Clees, T.; Hornung, N.; Nikitin, I.; Nikitina, L.; Steffes-lai, D.; Klimenko, S.
Zeitschriftenaufsatz
2014Model order reduction of differential algebraic equations arising from the simulation of gas transport networks
Grundel, Sara; Jansen, Lennart; Hornung, Nils; Clees, Tanja; Tischendorf, Caren; Benner, Peter
Konferenzbeitrag
2014Robust optimization for long running computer simulations with a focus on robustness measures
Rhein, B.; Clees, T.; Ruschitzka, M.
Konferenzbeitrag
2014Robustness measures and numerical approximation of the cumulative density function of response surfaces
Rhein, B.; Clees, T.; Ruschitzka, M.
Zeitschriftenaufsatz
2013Analysis of bulky crash simulation results: Deterministic and stochastic aspects
Clees, T.; Nikitin, I.; Nikitina, L.; Thole, C.-A.
Konferenzbeitrag
2013Berücksichtigung prozessbedingter Streuung von Punktschweißverbindungen
Sommer, Silke; Steffes-lai, Daniela; Clees, Tanja
Zeitschriftenaufsatz
2013Computing surrogates for gas network simulation using model order reduction
Grundel, Sara; Hornung, Nils; Klaassen, Bernhard; Benner, Peter; Clees, Tanja
Aufsatz in Buch
2013An efficient knowledge based system for the prediction of the technical feasibility of sheet metal forming processes
Steffes-lai, Daniela; Turck, Sven; Klimmek, Christian; Clees, Tanja
Konferenzbeitrag
2013Efficient quantile estimators for river bed morphodynamics
Clees, T.; Nikitin, I.; Nikitina, L.; Pott, S.
Konferenzbeitrag
2013Multi-objective optimization and stochastic analysis in focused ultrasonic therapy simulation
Clees, T.; Hornung, N.; Nikitin, I.; Nikitina, L.; Steffes-lai, D.
Konferenzbeitrag
2013SIMOPEK - Simulation and Optimization of Data Center Energy Flows from Cooling Networks taking into Account HPC Operation Scenarios
Clees, Tanja; Wilde, Torsten
Zeitschriftenaufsatz
2013A Simulation Framework for Robust Optimization Based on Metamodels
Rhein, Beate; Ruschitzka, Margot; Clees, Tanja
Konferenzbeitrag
2012Aspects of adaptive hierarchical RBF metamodels for optimization
Bühren, Georg van; Hornung, Nils; Clees, Tanja; Nikitina, Lialia
Zeitschriftenaufsatz
2012Nonlinear metamodeling of bulky data and applications in automotive design
Nikitina, L.; Nikitin, I.; Clees, T.
Konferenzbeitrag
2012Reliability analysis of river bed simulation models
Clees, T.; Nikitin, I.; Nikitina, L.; Kopmann, R.
Konferenzbeitrag
2012Sensitivity and robustness aspects in focused ultrasonic therapy simulation
Borsotto, D.; Clees, T.; Nikitin, I.; Nikitina, L.; Steffes-Lai, D.; Thole, C.-A.
Konferenzbeitrag
2012Statistical analysis of forming processes as a first step in a process-chain analysis: Novel PRO-CHAIN components
Steffes-lai, D.; Clees, T.
Konferenzbeitrag
2012Stochastic analysis and nonlinear metamodeling of crash test simulations and their application in automotive design
Nikitin, I.; Nikitina, L.; Clees, T.
Aufsatz in Buch
2012Uncertainty quantification using nonparametric quantile estimation and metamodeling
Rhein, B.; Clees, T.; Ruschitzka, M.
Konferenzbeitrag
2011Efficient stochastic analysis of process chains
Steffes-lai, Daniela; Clees, Tanja
Konferenzbeitrag, Zeitschriftenaufsatz
2011Fully coupled circuit and device simulation with exploitation of algebraic multigrid linear solvers
Klaassen, B.; Clees, T.; Tischendorf, C.; Selva Soto, M.; Baumanns, S.
Konferenzbeitrag
2011Hierarchical simulation of process variations and their impact on circuits and systems: Methodology
Lorenz, J.; Bär, E.; Clees, T.; Jancke, R.; Salzig, C.P.J; Selberherr, S.
Zeitschriftenaufsatz
2011Hierarchical simulation of process variations and their impact on circuits and systems: Results
Lorenz, J.K.; Bär, E.; Clees, T.; Evanschitzky, P.; Jancke, R.; Kampen, C.; Paschen, U.; Salzig, C.P.J; Selberherr, S.
Zeitschriftenaufsatz
2011Nonlinear metamodeling and robust optimization in automotive design
Clees, T.; Nikitin, I.; Nikitina, L.; Thole, C.-A.
Konferenzbeitrag
2011Statistical analysis of process chains: Novel PRO-CHAIN components
Steffes-lai, D.; Clees, T.
Konferenzbeitrag
2010Advanced mode analysis for crash simulation results
Thole, C.-A.; Nikitina, L.; Nikitin, I.; Clees, T.
Konferenzbeitrag
2010Efficient algebraic multigrid for migration-diffusion-convection-reaction systems arising in electrochemical simulations
Thum, P.; Clees, T.; Weyns, G.; Nelissen, G.; Deconinck, J.
Zeitschriftenaufsatz
2010An efficient algebraic multigrid solver strategy for adaptive implicit methods in oil-reservoir simulation
Clees, T.; Ganzer, L.
Zeitschriftenaufsatz
2010Mixed-level simulation including parameter sensitivity analysis
Clees, T.; Klaassen, B.; Tischendorf, C.
Konferenzbeitrag
2010Multi-objective optimisation on the basis of random models for ethylene oxide
Maaß, A.; Nikitina, L.; Clees, T.; Kirschner, K.N.; Reith, D.
Zeitschriftenaufsatz, Konferenzbeitrag
2010Multi-objective optimization using surrogate functions
Hornung, Nils; Nikitina, Lialia; Clees, Tanja
Konferenzbeitrag
2010PRO-CHAIN efficient statistical analysis of process chains applied to a forming-to-crash example
Clees, T.; Steffes-lai, D.
Konferenzbeitrag
2010PRO-CHAIN. Efficient statistical analysis of process chains
Clees, T.; Steffes-lai, D.
Zeitschriftenaufsatz
2010Statistical analysis and robust optimization of forming processes and forming-to-crash process chains
Clees, T.; Steffes-lai, D.; Helbig, M.; Sun, D.-Z.
Konferenzbeitrag, Zeitschriftenaufsatz
2010Towards physics-oriented smoothing in algebraic multigrid for systems of partial differential equations arising in multi-ion transport and reaction models
Thum, P.; Clees, T.
Zeitschriftenaufsatz
2009Computer aided robust design for multi-disciplinary processes
Clees, T.
Konferenzbeitrag
2009Development of a material model for the process chain forming to crash taking stochastic and deterministic influences into account
Helbig, M.; Andrieux, F.; Steffes-lai, D.; Clees, T.
Konferenzbeitrag
2009Multigrid software for industrial applications - From MG00 to SAMG
Trottenberg, U.; Clees, T.
Aufsatz in Buch
2009Process chain forming to crash
Clees, T.; Steffes-lai, D.; Helbig, M.; Roll, K.; Feucht, M.
Konferenzbeitrag
2009Towards physics-oriented algebraic multigrid for systems of partial differential equations
Clees, T.
Konferenzbeitrag
2008Application of single-level, pointwise algebraic, and smoothed aggregation multigrid methods to direct numerical simulations of incompressible turbulent flows
Larson, G.; Snyder, D.; Abeele, D. van den; Clees, T.
Zeitschriftenaufsatz
2008Computer Aided Robust Design - auf dem Weg zur simulierten Realität
Burblies, A.; Clees, T.
Zeitschriftenaufsatz
2007Algebraic multigrid methods (AMG) for the efficient solution of fully implicit formulations in reservoir simulation
Stüben, K.; Clees, T.; Klie, H.; Lou, B.; Wheeler, M.F.
Konferenzbeitrag
2007An automatic multi-level solver switching strategy for PEEC-based EMC simulation
Clees, T.; Samrowski, T.; Zitzmann, M.L.; Weigel, R.
Konferenzbeitrag
2007Deflation AMG solvers for highly Ill-conditioned reservoir simulation problems
Klie, H.; Wheeler, M.F.; Clees, T.; Stüben, K.
Konferenzbeitrag
2007An efficient algebraic multigrid solver strategy for adaptive implicit methods in oil reservoir simulation
Clees, T.; Ganzer, L.
Konferenzbeitrag
2006Hybrid solver strategies in automotive EMC simulation
Zitzmann, M.-L.; Grillmair, R.; Clees, T.; Weigel, R.
Konferenzbeitrag
2006Iterative methods for reluctance based PEEC models
Zitzmann, M.-L.; Clees, T.; Weigel, R.
Konferenzbeitrag
2005AMG strategies for PDE systems with applications in industrial semiconductor simulation
Clees, T.
Dissertation
2003Algebraic multigrid for industrial semiconductor device simulation
Clees, T.; Stüben, K.
Konferenzbeitrag