@misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {Decomposing Constraint Satisfaction Problems by Means of Meta Constraint Satisfaction Optimization Problems}, series = {Proceedings of the 11th International Conference on Agents and Artificial Intelligence, ICAART 2019}, journal = {Proceedings of the 11th International Conference on Agents and Artificial Intelligence, ICAART 2019}, editor = {Rocha, Ana Paula and Steels, Luc and Herik, Jaap van den}, publisher = {SciTePress}, isbn = {978-989-758-350-6}, doi = {10.5220/0007455907550761}, pages = {755 -- 761}, abstract = {This paper describes a new approach to decompose constraint satisfaction problems (CSPs) using an auxiliary constraint satisfaction optimization problem (CSOP) that detects sub-CSPs which share only few common variables. The purpose of this approach is to find sub-CSPs which can be solved in parallel and combined to a complete solution of the original CSP. Therefore, our decomposition approach has two goals: 1. to evenly balance the workload distribution over all cores and solve the partial CSPs as fast as possible and 2. to minimize the number of shared variables to make the join process of the solutions as fast as possible.}, language = {en} } @misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {A Meta Constraint Satisfaction Optimization Problem for the Optimization of Regular Constraint Satisfaction Problems}, series = {Proceedings of the 11th International Conference on Agents and Artificial Intelligence}, journal = {Proceedings of the 11th International Conference on Agents and Artificial Intelligence}, editor = {Rocha, Ana Paula and Steels, Luc and Herik, Jaap van den}, publisher = {SciTePress}, isbn = {978-989-758-350-6}, doi = {10.5220/0007260204350442}, pages = {435 -- 442}, abstract = {This paper describes a new approach on optimization of regular constraint satisfaction problems (rCSPs) using an auxiliary constraint satisfaction optimization problem (CSOP) that detects areas with a potentially high number of conflicts. The purpose of this approach is to remove conflicts by the combination of regular constraints with intersection and concatenation of their underlying deterministic finite automatons (DFAs). This, eventually, often allows to significantly speed-up the solution process of the original rCSP.}, language = {en} } @misc{LiuLoefflerHofstedt, author = {Liu, Ke and L{\"o}ffler, Sven and Hofstedt, Petra}, title = {Social Golfer Problem Revisited}, series = {Agents and Artificial Intelligence - 11th International Conference, {ICAART} 2019, Prague, Czech Republic, February 19-21, 2019, Revised Selected Papers}, journal = {Agents and Artificial Intelligence - 11th International Conference, {ICAART} 2019, Prague, Czech Republic, February 19-21, 2019, Revised Selected Papers}, editor = {Herik, Jaap van den and Rocha, Ana Paula and Steels, Luc}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-37493-8}, issn = {0302-9743}, doi = {10.1007/978-3-030-37494-5_5}, pages = {72 -- 99}, language = {en} } @misc{LiuLoefflerHofstedt, author = {Liu, Ke and L{\"o}ffler, Sven and Hofstedt, Petra}, title = {Exploring Properties of Icosoku by Constraint Satisfaction Approach}, series = {Pre-proceedings of the {DECLARE} 2019 Conference}, journal = {Pre-proceedings of the {DECLARE} 2019 Conference}, editor = {Abreu, Salvador and Hofstedt, Petra and John, Ulrich and Kuchen, Herbert and Seipel, Dietmar}, pages = {7}, language = {en} } @misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {The Regularization of Small Sub-Constraint Satisfaction Problems}, series = {Pre-proceedings of the DECLARE 2019 Conference}, journal = {Pre-proceedings of the DECLARE 2019 Conference}, editor = {Abreu, Salvador and Hofstedt, Petra and John, Ulrich and Kuchen, Herbert and Seipel, Dietmar}, pages = {7}, language = {en} } @misc{LiuLoefflerHofstedt, author = {Liu, Ke and L{\"o}ffler, Sven and Hofstedt, Petra}, title = {Solving the Talent Scheduling Problem by Parallel Constraint Programming}, series = {Artificial Intelligence Applications and Innovations - 15th IFIP WG 12.5 International Conference, AIAI 2019}, journal = {Artificial Intelligence Applications and Innovations - 15th IFIP WG 12.5 International Conference, AIAI 2019}, editor = {MacIntyre, John and Maglogiannis, Ilias and Iliadis, Lazaros S. and Pimenidis, Elias}, publisher = {Springer}, isbn = {978-3-030-19822-0}, issn = {1868-4238}, doi = {10.1007/978-3-030-19823-7_19}, pages = {236 -- 244}, language = {en} } @incollection{HofstedtHowerJohnetal., author = {Hofstedt, Petra and Hower, Walter and John, Ulrich and Wolf, Armin}, title = {MOC 2019 - 11. Workshop zur transparenten Modellierung und Optimierung komplexer Probleme}, series = {INFORMATIK 2019 - 50 Jahre Gesellschaft f{\"u}r Informatik - Informatik f{\"u}r Gesellschaft}, booktitle = {INFORMATIK 2019 - 50 Jahre Gesellschaft f{\"u}r Informatik - Informatik f{\"u}r Gesellschaft}, editor = {Draude, Claude and Lange, Martin and Sick, Bernhard}, publisher = {GI}, address = {Bonn}, isbn = {978-3-88579-689-3}, doi = {10.18420/inf2019_ws40}, pages = {1}, language = {de} } @misc{LiuLoefflerHofstedt, author = {Liu, Ke and L{\"o}ffler, Sven and Hofstedt, Petra}, title = {Parallel Stochastic Portfolio Search for Constraint Solving}, series = {2019 IEEE Intl Conf on Parallel \& Distributed Processing with Applications, Big Data \& Cloud Computing, Sustainable Computing \& Communications, Social Computing \& Networking (ISPA/BDCloud/SocialCom/SustainCom)}, journal = {2019 IEEE Intl Conf on Parallel \& Distributed Processing with Applications, Big Data \& Cloud Computing, Sustainable Computing \& Communications, Social Computing \& Networking (ISPA/BDCloud/SocialCom/SustainCom)}, publisher = {IEEE}, isbn = {978-1-7281-4328-6}, doi = {10.1109/ISPA-BDCloud-SustainCom-SocialCom48970.2019.00106}, pages = {697 -- 704}, language = {en} } @misc{LiuLoefflerHofstedt, author = {Liu, Ke and L{\"o}ffler, Sven and Hofstedt, Petra}, title = {Exploring Properties of Icosoku by Constraint Satisfaction Approach}, series = {Declarative Programming and Knowledge Management - Conference on Declarative Programming, DECLARE 2019, Unifying INAP, WLP, and WFLP, Revised Selected Papers}, journal = {Declarative Programming and Knowledge Management - Conference on Declarative Programming, DECLARE 2019, Unifying INAP, WLP, and WFLP, Revised Selected Papers}, editor = {Hofstedt, Petra and Abreu, Salvador and John, Ulrich and Kuchen, Herbert and Seipel, Dietmar}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-46713-5}, issn = {0302-9743}, doi = {10.1007/978-3-030-46714-2_7}, pages = {99 -- 105}, language = {en} } @misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {The Regularization of Small Sub-Constraint Satisfaction Problems}, series = {Declarative Programming and Knowledge Management - Conference on Declarative Programming, DECLARE 2019, Unifying INAP, WLP, and WFLP, Revised Selected Papers}, journal = {Declarative Programming and Knowledge Management - Conference on Declarative Programming, DECLARE 2019, Unifying INAP, WLP, and WFLP, Revised Selected Papers}, editor = {Hofstedt, Petra and Abreu, Salvador and John, Ulrich and Kuchen, Herbert and Seipel, Dietmar}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-46713-5}, issn = {0302-9743}, doi = {10.1007/978-3-030-46714-2_8}, pages = {106 -- 115}, language = {en} } @misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {Optimizing Constraint Satisfaction Problems by Regularization for the Sample Case of the Warehouse Location Problem}, series = {KI 2020: Advances in Artificial Intelligence, 43rd German Conference on AI, Bamberg, Germany, September 21-25, 2020}, journal = {KI 2020: Advances in Artificial Intelligence, 43rd German Conference on AI, Bamberg, Germany, September 21-25, 2020}, editor = {Schmid, Ute and Kl{\"u}gl, Franziska and Wolter, Diedrich}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-58284-5}, issn = {0302-9743}, doi = {10.1007/978-3-030-58285-2_26}, pages = {297 -- 304}, language = {en} } @misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {An Introduction of FD-Complete Constraints}, series = {Artificial Intelligence Applications and Innovations : 16th IFIP WG 12.5 International Conference, AIAI 2020, Neos Marmaras, Greece, June 5-7, 2020, Proceedings, Part II}, journal = {Artificial Intelligence Applications and Innovations : 16th IFIP WG 12.5 International Conference, AIAI 2020, Neos Marmaras, Greece, June 5-7, 2020, Proceedings, Part II}, editor = {Maglogiannis, Ilias and Iliadis, Lazaros S. and Pimenidis, Elias}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-49185-7}, issn = {1868-4238}, doi = {10.1007/978-3-030-49186-4_3}, pages = {27 -- 38}, language = {en} } @misc{LoefflerLiuHofstedt, author = {L{\"o}ffler, Sven and Liu, Ke and Hofstedt, Petra}, title = {Exploring Properties of the Instant Insanity Puzzle with Constraint Satisfaction Approach}, series = {Proceedings of the 12th International Conference on Agents and Artificial Intelligence, ICAART 2020-(Volume 2), February 22-24, 2020, in Valletta, Malta}, journal = {Proceedings of the 12th International Conference on Agents and Artificial Intelligence, ICAART 2020-(Volume 2), February 22-24, 2020, in Valletta, Malta}, editor = {Rocha, Ana Paula and Steels, Luc and Herik, Jaap van den}, publisher = {SciTePress}, address = {Setubal}, isbn = {978-989-758-395-7}, doi = {10.5220/0008880403310338}, pages = {331 -- 338}, language = {en} } @incollection{HofstedtLoeffler, author = {Hofstedt, Petra and L{\"o}ffler, Sven}, title = {Constraints}, series = {Handbuch der k{\"u}nstlichen Intelligenz}, booktitle = {Handbuch der k{\"u}nstlichen Intelligenz}, editor = {G{\"o}rz, G{\"u}nther and Schmid, Ute and Braun, Tanya}, edition = {6. Auflage}, publisher = {De Gruyter}, address = {Berlin, Boston}, isbn = {978-3-11-065984-9}, doi = {10.1515/9783110659948-016}, pages = {713 -- 754}, language = {de} } @misc{LoefflerBeckerHofstedt, author = {L{\"o}ffler, Sven and Becker, Ilja and Hofstedt, Petra}, title = {ML-based Decision Support for CSP Modelling with Regular Membership and Table Constraints}, series = {Proceedings of the 13th International Conference on Agents and Artificial Intelligence (ICAART), Volume 2}, journal = {Proceedings of the 13th International Conference on Agents and Artificial Intelligence (ICAART), Volume 2}, isbn = {978-989-758-484-8}, issn = {2184-433X}, doi = {10.5220/0010299109740981}, pages = {974 -- 981}, language = {en} } @misc{LoefflerBeckerKrolletal., author = {L{\"o}ffler, Sven and Becker, Ilja and Kroll, Franz and Hofstedt, Petra}, title = {A Survey of Constraint Transformation Methods}, series = {51. Jahrestagung der Gesellschaft f{\"u}r Informatik, INFORMATIK 2021 - Computer Science \& Sustainability}, journal = {51. Jahrestagung der Gesellschaft f{\"u}r Informatik, INFORMATIK 2021 - Computer Science \& Sustainability}, isbn = {978-3-88579-708-1}, doi = {10.18420/informatik2021-090}, pages = {1107 -- 1120}, language = {en} } @misc{KrollLoefflerBeckeretal., author = {Kroll, Franz and L{\"o}ffler, Sven and Becker, Ilja and Hofstedt, Petra}, title = {Automatic Detection of Timed-up and Go Tests with IMU Sensor Data}, series = {Proceedings of the 15th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2022}, journal = {Proceedings of the 15th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2022}, editor = {Roque, Ana C.A. and Fred, Ana L.N. and Gamboa, Hugo}, publisher = {SCITEPRESS}, isbn = {978-989-758-552-4}, issn = {2184-4305}, doi = {10.5220/0010775300003123}, pages = {15 -- 24}, language = {en} } @misc{LoefflerKrollBeckeretal., author = {L{\"o}ffler, Sven and Kroll, Franz and Becker, Ilja and Hofstedt, Petra}, title = {Optimal Beacon Placement for Indoor Positioning Using Constraint Programming}, series = {19th IEEE/ACS International Conference on Computer Systems and Applications - AICCSA 2022}, journal = {19th IEEE/ACS International Conference on Computer Systems and Applications - AICCSA 2022}, publisher = {IEEE}, isbn = {979-8-3503-1008-5}, doi = {10.1109/AICCSA56895.2022.10017575}, language = {en} } @misc{BreussLoefflerHofstedt, author = {Breuß, Sonja and L{\"o}ffler, Sven and Hofstedt, Petra}, title = {A Hybrid Constraint- and Search-Based Approach on the Stockyard Planning Problem}, series = {Proceedings of the 21st International Conference on Informatics in Control, Automation and Robotics}, volume = {1}, journal = {Proceedings of the 21st International Conference on Informatics in Control, Automation and Robotics}, publisher = {SCITEPRESS - Science and Technology Publications}, isbn = {978-989-758-717-7}, issn = {2184-2809}, doi = {10.5220/0012995000003822}, pages = {113 -- 125}, language = {en} } @misc{LoefflerHofstedt, author = {L{\"o}ffler, Sven and Hofstedt, Petra}, title = {Automatic Placement of Digital Signals in Railway Digitalization: A Constraint Approach}, series = {Proceedings of the 21st International Conference on Informatics in Control, Automation and Robotics}, volume = {1}, journal = {Proceedings of the 21st International Conference on Informatics in Control, Automation and Robotics}, publisher = {SCITEPRESS - Science and Technology Publications}, isbn = {978-989-758-717-7}, issn = {2184-2809}, doi = {10.5220/0012994800003822}, pages = {101 -- 112}, language = {en} }