In this paper we consider a 3-echelon, multi-product supply chain design model with economies of scale in transport and warehousing that explicitly takes transport frequencies into consideration. Our model simultaneously optimizes locations and sizes of tank farms, material flows, and transport frequencies within the network. We consider all relevant costs: product cost, transport cost, tank re...

Inspired by the d-step approach used for investigating the diameter of polytopes, the following d-step conjecture was introduced by Deza and Franek : the number of runs in a string of length n with d distinct symbols is at most n− d. Bannai et al. showed that the number of runs in a string is less than its length by mapping each run to a set of starting positions of Lyndon roots. We show that B...

The issue discussed in this paper is a bi-level problem in which two rivals compete in attracting customers and maximizing their profits which means that competitors competing for market share must compete in the centers that are going to be located in the near future. In this paper, a nonlinear model presented in the literature considering customer preferences is linearized. Customer behavior ...

Many document analysis and OCR systems depend on precise identification of page rotation, as well as the reliable identification of text lines. This paper presents a new algorithm to address both problems. It uses a branch-and-bound approach to globally optimal line finding and simultaneously models the baseline and the descender line under a Gaussian error/robust least square model. Results of...

Nichtlineare hybride dynamische Systemmodelle kooperativer Optimalsteuerungsprobleme ermöglichen eine enge und formale Kopplung von diskreter und kontinuierlicher Zustandsdynamik, d.h. von dynamischer Rollen-, Aktionszuweisung mit wechselnder physikalischer Fahrdynamik. In den resultierenden gemischt-ganzzahligen Mehrphasen-Optimalsteuerungsproblemen können Beschränkungen an diskrete und kontin...