TY - JOUR
AB - It is a challenging task to identify the objectives on which a certain decision was based, in particular if several, potentially conflicting criteria are equally important and a continuous set of optimal compromise decisions exists. This task can be understood as the inverse problem of multiobjective optimization, where the goal is to find the objective function vector of a given Pareto set. To this end, we present a method to construct the objective function vector of an unconstrained multiobjective optimization problem (MOP) such that the Pareto critical set contains a given set of data points with prescribed KKT multipliers. If such an MOP can not be found, then the method instead produces an MOP whose Pareto critical set is at least close to the data points. The key idea is to consider the objective function vector in the multiobjective KKT conditions as variable and then search for the objectives that minimize the Euclidean norm of the resulting system of equations. By expressing the objectives in a finite-dimensional basis, we transform this problem into a homogeneous, linear system of equations that can be solved efficiently. Potential applications of this approach include the identification of objectives (both from clean and noisy data) and the construction of surrogate models for expensive MOPs.
AU - Gebken, Bennet
AU - Peitz, Sebastian
ID - 16295
JF - Journal of Global Optimization
TI - Inverse multiobjective optimization: Inferring decision criteria from data
ER -
TY - JOUR
AB - The increasingly simulation-driven design process of ultrasonic transducers requires several reliable parameters for the description of the material behaviour. Exact results can only be achieved when a single specimen is used in the identification process, which typically is prone to the problem of low sensitivities to certain material parameters and thus high uncertainties. Therefore, a custom electrode topology for increased sensitivity is proposed for a piezoceramic disc. The thereupon conducted measurements of the electric impedance can be used as a starting point for an inverse approach where an equivalent simulation model is used to identify fitting material parameters. An optimisation strategy based on a preliminary sensitivity analysis is presented that leads to a good agreement between measurement and simulation. Furthermore, the proposed measurement procedure is able to evaluate the quality of the simulation model. Hence, different frequency-dependent damping models are presented and evaluated.
AU - Feldmann, Nadine
AU - Schulze, Veronika
AU - Claes, Leander
AU - Jurgelucks, Benjamin
AU - Walther, Andrea
AU - Henning, Bernd
ID - 19313
JF - tm - Technisches Messen
SN - 2196-7113
TI - Inverse piezoelectric material parameter characterization using a single disc-shaped specimen
ER -
TY - CONF
AU - Kiesel, Johannes
AU - Lang, Kevin
AU - Wachsmuth, Henning
AU - Hornecker, Eva
AU - Stein, Benno
ID - 15825
T2 - Proceedings of the 2020 ACM SIGIR Conference on Human Information Interaction & Retrieval (CHIIR 2020)
TI - Investigating Expectations for Voice-based and Conversational Argument Search on the Web
ER -
TY - CONF
AU - Kappe, Fabian
AU - Wituschek, Simon
AU - Lechner, Michael
AU - Bobbert, Mathias
AU - Meschut, Gerson
AU - Merklein, Marion
ID - 20680
TI - Investigation of influencing parameters on the joint formation of the self-piercing riveting process
ER -
TY - CHAP
AU - Harteis, Christian
AU - Caruso, Carina
ED - Rheinländer, K.
ED - Scholl, D.
ID - 16508
T2 - Verlängerte Praxisphasen in der universitären Lehrerbildung: Spannungsfelder zwischen Theorie, Praxis und der Bestimmung von Professionalisierung
TI - Inwiefern können Praxisphasen im Studium zu einer Theorie-Praxis-Relationierung beitragen? Implikationen für die professionelle Entwicklung angehender Lehrkräfte.
ER -
TY - GEN
AU - Knorr, Karin
AU - Auer, Thorsten Fabian
AU - Thommes, Kirsten
ED - Atinc, Guclu
ID - 17858
IS - 1
T2 - Academy of Management Proceedings
TI - Is Corruption Imprinted? A Study on Preconditions of Corruption in Post-Communist Countries
VL - 2020
ER -
TY - GEN
AU - Philipp, Schumann
ID - 15719
TI - Is Delivery Killing Dine-In Restaurants?" - Eine ökonometrische Analyse von Spillover-Effekten für digitale Plattformen in der Restaurantindustrie
ER -
TY - CONF
AU - Günter, Heinrich
AU - Meschut, Gerson
ID - 20301
T2 - 73rd IIW Annual Assembly and International Conference
TI - Joining of high-strength steel grades in lightweight structures using single-stage resistance element welding on conventional resistance spot welding machines
ER -
TY - JOUR
AU - Günter, Heinrich
AU - Meschut, Gerson
ID - 20302
JF - Welding in the World
TI - Joining of high-strength steel grades in lightweight structures using single-stage resistance element welding on conventional resistance spot welding machines
ER -
TY - GEN
ED - Troschitz, Juliane
ED - Vorderbrüggen, Julian
ED - Kupfer, Robert
ED - Gude, Maik
ED - Meschut, Gerson
ID - 20119
T2 - Applied Sciences
TI - Joining of Thermoplastic Composites with Metals Using Resistance ElementWelding
ER -