Michal Maciejewski

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The paper presents the idea and the initial outcomes of integrating MATSim, a multi-agent transport simulation system, with the DVRP Optimizer, an application for solving the Dynamic Vehicle Routing Problem. First, the justification for the research is given and the state of the art is outlined. Then, MATSim is presented with a short description of the(More)
With current on-board GPS devices a lot of data is being collected while operating taxis. This paper focuses on analysing travel behaviour and vehicle supply of the Berlin taxi market using floating car data (FCD) for one week each in 2013 and 2014. The data suggests that there is generally a demand peak on workday mornings and a second peak over a longer(More)
This study proposes and evaluates an efficient real-time taxi dispatching strategy that solves the linear assignment problem to find a globally optimal taxi-to-request assignment at each decision epoch. The authors compare the assignment-based strategy with two popular rule-based strategies. They evaluate dispatching strategies in detail in the city of(More)
Implementing a large-scale information system for the education sector involves a number of engineering challenges, such as high security and correctness standards imposed by the law, a large and varied group of end users, or fault-tolerance and a distributed character of processing. In this paper we report on our experiences with building and deploying a(More)
—In this paper, we propose an optimized field/circuit coupling approach for the simulation of magnetothermal tran-sients in superconducting magnets. The approach improves the convergence of the iterative coupling scheme between a magne-tothermal partial differential model and an electrical lumped-element circuit. Such a multi-physics, multi-rate and(More)
The paper describes a flexible, extensible, and user-friendly framework to model electrothermal transients occurring in superconducting magnets. Simulations are a fundamental tool for assessing the performance of a magnet and its protection system against the effects of a sudden transition from the superconducting to the normal state (also known as a(More)
—In this paper we present the co-simulation of a PID class power converter controller and an electrical circuit by means of the waveform relaxation technique. The simulation of the controller model is characterized by a fixed-time stepping scheme reflecting its digital implementation, whereas a circuit simulation usually employs an adaptive time stepping(More)