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- ArticleOctober 2024
Independent Relaxed Subproblems for Dominance Testing in CP-Nets
AbstractConditional preference networks (CP-nets) have received significant attention for modeling preferences over combinations of features. However, dominance testing, the problem of inferring from a CP-net whether one outcome is always preferred over ...
- extended-abstractOctober 2024
Leveraging Monte Carlo Tree Search for Group Recommendation
RecSys '24: Proceedings of the 18th ACM Conference on Recommender SystemsPages 1136–1141https://doi.org/10.1145/3640457.3691713Group recommenders aim to provide recommendations that satisfy the collective preferences of multiple users, a challenging task due to the diverse individual tastes and conflicting interests to be balanced. This is often accomplished by using aggregation ...
- research-articleMay 2024
Optimizing Initial State of Detector Sensors in Quantum Sensor Networks
ACM Transactions on Quantum Computing (TQC), Volume 5, Issue 2Article No.: 10, Pages 1–25https://doi.org/10.1145/3655028In this article, we consider a network of quantum sensors, where each sensor is a qubit detector that “fires,” i.e., its state changes when an event occurs close by. The change in state due to the firing of a detector is given by a unitary operator, which ...
- extended-abstractMay 2024
Clique Analysis and Bypassing in Continuous-Time Conflict-Based Search
AAMAS '24: Proceedings of the 23rd International Conference on Autonomous Agents and Multiagent SystemsPages 2540–2542We study symmetry-breaking enhancements for Continuous-Time Conflict-Based Search (CCBS), a solver for continuous-time MAPF. Resolving conflict symmetries in MAPF can require an exponential amount of work. We adapt known symmetry-breaking enhancements ...
- ArticleMarch 2024
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- research-articleMarch 2024
Efficient Bounded-Suboptimal Search for the Multiagent Pathfinding Problem
Scientific and Technical Information Processing (SPSTIP), Volume 50, Issue 5Pages 357–367https://doi.org/10.3103/S0147688223050015Abstract—This article considers the problem of planning a complex of nonconflicting paths for a set of agents that are capable of performing actions of arbitrary duration. Two bounded-suboptimal modifications of a conflict-based search algorithm are ...
- research-articleAugust 2023
Detecting Critical Nodes in Sparse Graphs via “Reduce-Solve-Combine” Memetic Search
INFORMS Journal on Computing (INFORMS-IJOC), Volume 36, Issue 1Pages 39–60https://doi.org/10.1287/ijoc.2022.0130This study considers a well-known critical node detection problem that aims to minimize a pairwise connectivity measure of an undirected graph via the removal of a subset of nodes (referred to as critical nodes) subject to a cardinality constraint. ...
A Constructive Heuristic for the Uniform Capacitated Vertex k-center Problem
- José Alejandro Cornejo-Acosta,
- Jesús García-Díaz,
- Julio César Pérez-Sansalvador,
- Roger Z. Ríos-Mercado,
- Saúl Eduardo Pomares-Hernández
ACM Journal of Experimental Algorithmics (JEA), Volume 28Article No.: 1.6, Pages 1–26https://doi.org/10.1145/3604911The uniform capacitated vertex k-center problem is an 𝒩𝒫-hard combinatorial optimization problem that models real situations where k centers can only attend a maximum number of customers, and the travel time or distance from the customers to their ...
- research-articleJuly 2023JUST ACCEPTED
Query-by-Example Spoken Term Detection for Zero-Resource Languages Using Heuristic Search
ACM Transactions on Asian and Low-Resource Language Information Processing (TALLIP), Just Accepted https://doi.org/10.1145/3609505Query-by-Example spoken content retrieval is a demanding and challenging task when a large volume of spoken content is piled up in the repositories without annotation. In the absence of annotation, spoken content retrieval is achieved by capturing the ...
- research-articleMay 2023
Optimally Solving the Multiple Watchman Route Problem with Heuristic Search
AAMAS '23: Proceedings of the 2023 International Conference on Autonomous Agents and Multiagent SystemsPages 905–913In the Watchman Route Problem (WRP), the task is to find a path for a watchman agent such that all locations in the given map will be visually seen by the watchman at least once during the path traversal. Recently, the problem has been optimally solved ...
- research-articleMay 2023
Heuristic Search for DNN Graph Substitutions
CACML '23: Proceedings of the 2023 2nd Asia Conference on Algorithms, Computing and Machine LearningPages 236–241https://doi.org/10.1145/3590003.3590044The research and development of deep learning cannot be separated from deep neural networks (DNNs). DNNs become deeper and more complex in pursuit of accuracy and precision, leading to significantly increasing inference time and training cost. Existing ...
- surveyFebruary 2023
Scheduling of Resource Allocation Systems with Timed Petri Nets: A Survey
ACM Computing Surveys (CSUR), Volume 55, Issue 11Article No.: 230, Pages 1–27https://doi.org/10.1145/3570326Resource allocation systems (RASs) belong to a kind of discrete event system commonly seen in the industry. In such systems, available resources are allocated to concurrently running processes to optimize some performance criteria. Search strategies in ...
- research-articleMay 2022
Learning Heuristics for Combinatorial Assignment by Optimally Solving Subproblems
AAMAS '22: Proceedings of the 21st International Conference on Autonomous Agents and Multiagent SystemsPages 1074–1082Hand-crafting accurate heuristics for optimization problems is often costly due to requiring expert knowledge and time-consuming parameter tuning. Automating this procedure using machine learning has in recent years shown great promise. However, a large ...
- research-articleJanuary 2022
Performance-Effective DAG Scheduling for Heterogeneous Distributed Systems
ICDCN '22: Proceedings of the 23rd International Conference on Distributed Computing and NetworkingPages 234–235https://doi.org/10.1145/3491003.3491298The problem of scheduling Directed Acyclic Graphs (DAGs) in order to minimize schedule length (also known as makespan), is known to be a challenging as well as computationally hard problem. Therefore, researchers have endeavored towards the design of ...
- research-articleNovember 2021
Exploring decision support systems in task scheduling
CASCON '21: Proceedings of the 31st Annual International Conference on Computer Science and Software EngineeringPages 184–189Weapon-target assignment (WTA) is a well-studied problem in operations research, with a wide range of applications in simple task assignments. However, in situations involving complex task scheduling, WTA fails to capture many important planning ...
- research-articleSeptember 2021
HMDS: A Makespan Minimizing DAG Scheduler for Heterogeneous Distributed Systems
ACM Transactions on Embedded Computing Systems (TECS), Volume 20, Issue 5sArticle No.: 106, Pages 1–26https://doi.org/10.1145/3477037The problem of scheduling Directed Acyclic Graphs in order to minimize makespan (schedule length), is known to be a challenging and computationally hard problem. Therefore, researchers have endeavored towards the design of various heuristic solution ...
- research-articleMay 2021
Learning Node-Selection Strategies in Bounded-Suboptimal Conflict-Based Search for Multi-Agent Path Finding
AAMAS '21: Proceedings of the 20th International Conference on Autonomous Agents and MultiAgent SystemsPages 611–619Multi-Agent Path Finding (MAPF) is an NP-hard problem that has important applications for distribution centers, traffic management and computer games, and it is still difficult for current solvers to solve large instances optimally. Bounded suboptimal ...
- research-articleApril 2020
Batch Informed Trees (BIT*): Informed asymptotically optimal anytime search
International Journal of Robotics Research (RBRS), Volume 39, Issue 5Pages 543–567https://doi.org/10.1177/0278364919890396Path planning in robotics often requires finding high-quality solutions to continuously valued and/or high-dimensional problems. These problems are challenging and most planning algorithms instead solve simplified approximations. Popular approximations ...
- research-articleJanuary 2020
Medical brain image classification based on multi-feature fusion of convolutional neural network
Journal of Intelligent & Fuzzy Systems: Applications in Engineering and Technology (JIFS), Volume 38, Issue 1Pages 127–137https://doi.org/10.3233/IFS-179387This paper presents a medical brain image algorithm based on multi-feature fusion. Feature extraction based on convolutional neural network was used as texture information, feature extraction based on voxel information was used as morphological feature, ...