TY - JOUR AU - Ősz, Olivér AU - Dávid, Balázs AU - Hegyháti, Máté TI - Comparison of discrete- and continuous-time models for scheduling waste wood processing facilities JF - CENTRAL EUROPEAN JOURNAL OF OPERATIONS RESEARCH J2 - CEJOR VL - 31 PY - 2023 IS - 3 SP - 853 EP - 871 PG - 19 SN - 1435-246X DO - 10.1007/s10100-023-00852-6 UR - https://m2.mtmt.hu/api/publication/33726430 ID - 33726430 AB - With the growing significance of environmental awareness, the role of renewable materials and their reuse and recycling possibilities have become increasingly important. Wood is one of the best examples for this, as it is a material that has a variety of primary uses, while also being a prime candidate for reuse and recycling. An important phase in most waste wood value chains is the processing of bulk waste from various sources, usually by means of shredding. This paper presents methods for scheduling the machines in such a waste wood processing facility, where incoming deliveries of different types of wood are processed by a series of treatment and transformation steps to produce shredded wood. Two mathematical models are developed for the problem that both allow overlaps between consecutive steps to optimize resource flow through the system. One of these is a more traditional discrete-time model, while the other is precedence-based and uses continuous-time variables for the timing of the various tasks. Both modeling techniques have their advantages and shortcomings with regard to the ease of integration of further problem-specific parameters and requirements. Next to providing a sound approach for the identified problem class, another aim is to evaluate, which technique suits better for this problem class, and should be used as a basis for extended and integrated cases in the future. Thus, the performance of these models is compared on instances that were randomly generated based on real-world distributions from the literature. LA - English DB - MTMT ER - TY - JOUR AU - Balogh, János AU - Dávid, Balázs AU - Krész, Miklós AU - Tóth, Attila AU - Tóth, László TI - A general framework for evaluating driver schedules in public transport JF - TRANSPORT PROBLEMS / PROBLEMY TRANSPORTU: INTERNATIONAL SCIENTIFIC JOURNAL J2 - TRANSP PROBL / PROBLEMY TRANSPORTU / INT SCI J VL - 17 PY - 2022 IS - 1 SP - 163 EP - 174 PG - 12 SN - 1896-0596 DO - 10.20858/tp.2022.17.1.14 UR - https://m2.mtmt.hu/api/publication/32761469 ID - 32761469 LA - English DB - MTMT ER - TY - CONF AU - Garab, József AU - Ősz, Olivér AU - Dávid, Balázs AU - Hegyháti, Máté ED - Sziklai, Balázs TI - Rétegelt lemezek gyártásának ütemezése T2 - XXXIV. Magyar Operációkutatási Konferencia: Absztraktok könyve PB - Gazdaságmodellezési Társaság C1 - Budapest PY - 2021 SP - 99 UR - https://m2.mtmt.hu/api/publication/32564741 ID - 32564741 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Dávid, Balázs AU - Ősz, Olivér AU - Hegyháti, Máté ED - Drobne, Samo ED - Stirn, Lidija Zadnik ED - Kljajić, Borštnar Mirjana ED - Povh, Janez ED - Žerovnik, Janez TI - Scheduling of Waste Wood Processing Facilities with Overlapping Jobs T2 - Proceedings of the 16th International Symposium on Operational Research in Slovenia PB - Slovenian Society Informatika CY - Ljubljana SN - 9789616165570 PY - 2021 SP - 321 EP - 326 PG - 6 UR - https://m2.mtmt.hu/api/publication/32247997 ID - 32247997 LA - English DB - MTMT ER - TY - JOUR AU - Dávid, Balázs AU - Ősz, Olivér AU - Hegyháti, Máté TI - Robust Scheduling of Waste Wood Processing Plants with Uncertain Delivery Sources and Quality JF - SUSTAINABILITY J2 - SUSTAINABILITY-BASEL VL - 13 PY - 2021 IS - 9 PG - 17 SN - 2071-1050 DO - 10.3390/su13095007 UR - https://m2.mtmt.hu/api/publication/31993132 ID - 31993132 LA - English DB - MTMT ER - TY - JOUR AU - Hajdu, László AU - Dávid, Balázs AU - Krész, Miklós TI - Gateway placement and traffic load simulation in sensor networks JF - POLLACK PERIODICA: AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES J2 - POLLACK PERIODICA VL - 16 PY - 2021 IS - 1 SP - 102 EP - 108 PG - 7 SN - 1788-1994 DO - 10.1556/606.2020.00199 UR - https://m2.mtmt.hu/api/publication/31940420 ID - 31940420 LA - English DB - MTMT ER - TY - CHAP AU - Egri, Péter AU - Dávid, Balázs AU - Kis, Tamás AU - Krész, Miklós ED - Golinska-Dawson, P TI - Robust Reverse Logistics Network Design T2 - Logistics Operations and Management for Recycling and Reuse PB - Springer Netherlands CY - Berlin SN - 9783642338571 T3 - EcoProduction: Environmental Issues in Logistics and Manufacturing, ISSN 2193-4614 PY - 2020 SP - 37 EP - 53 PG - 17 DO - 10.1007/978-3-642-33857-1_3 UR - https://m2.mtmt.hu/api/publication/31795833 ID - 31795833 LA - English DB - MTMT ER - TY - JOUR AU - Dávid, Balázs AU - Krész, Miklós TI - Multi-depot bus schedule assignment with parking and maintenance constraints for intercity transportation over a planning period JF - TRANSPORTATION LETTERS: THE INTERNATIONAL JOURNAL OF TRANSPORTATION RESEARCH J2 - TRANSP LETT VL - 12 PY - 2020 IS - 1 SP - 65 EP - 75 PG - 10 SN - 1942-7867 DO - 10.1080/19427867.2018.1512216 UR - https://m2.mtmt.hu/api/publication/3413546 ID - 3413546 LA - English DB - MTMT ER - TY - CHAP AU - Dávid, Balázs ED - Zadnik Stirn, L ED - Kljajić Borštar, M ED - Žerovnik, J ED - Drobneand, S ED - Povh, J TI - A Tabu search method for optimizing heterogeneous structural frames T2 - Proceedings of the 15th International Symposium on Operational Research PB - Slovenian Society Informatika CY - Ljubljana SN - 9789616165556 PY - 2019 SP - 481 EP - 486 PG - 6 UR - https://m2.mtmt.hu/api/publication/31629624 ID - 31629624 N1 - Association of European Operational Research Societies (EURO); Partnership for Advanced Computing in Europe (PRACE) InnoRenew CoE, Livade 6, Izola, 6310, Slovenia University of Primorska, Faculty of Mathematics, Natural Sciences and Information Technologies, Glagoljaška ulica 8, Koper, 6000, Slovenia Conference code: 159842 Export Date: 14 October 2020 Correspondence Address: Dávid, B.; InnoRenew CoE, Livade 6, Slovenia; email: balazs.david@innorenew.eu Funding details: European Commission, EC, 739574 Funding details: European Regional Development Fund, FEDER Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI Funding text 1: The author gratefully acknowledges the European Commission for funding the InnoRenew CoE project (Grant Agreement #739574) under the Horizon2020 Widespread-Teaming program and the Republic of Slovenia (Investment funding of the Republic of Slovenia and the European Union of the European regional Development Fund), and is grateful for the support of the National Research, Development and Innovation Office - NKFIH Fund No. SNN-117879. AB - Structural design is responsible for the design and development of structural plans. It consists of multiple steps that have to be performed sequentially. As the output of a step acts as an input for the next one, using optimization tools to aid the design process can help in achieving a better overall quality or a particular design. In this paper, we present a heuristic method that can provide useful suggestions in a short time for the structural design of a building based on preliminary plans. We also introduce a mathematical model that can be used as quality control of the results. © Proceedings of the 15th International Symposium on Operational Research, SOR 2019. All rights reserved. LA - English DB - MTMT ER - TY - CHAP AU - Hajdu, László AU - Krész, Miklós AU - Dávid, Balázs ED - Iványi, Péter TI - Traffic Load Simulation for different sensor placements T2 - Abstract book for the 15th Miklós Iványi International PhD & DLA Symposium PB - Pollack Press CY - Pécs SN - 9789634294498 PY - 2019 PG - 1 UR - https://m2.mtmt.hu/api/publication/30926619 ID - 30926619 LA - English DB - MTMT ER -