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Ryota Higa

8 accepted papers

2026

Feasibility-Aware Masked Transformer for the Pickup-and-Delivery Problem with Time Windows (Student Abstract)

AAAI 2026technical

The Pickup-and-Delivery Problem with Time Windows (PDPTW) is a time-constrained variant of the vehicle-routing problem (VRP). Complex time constraints make it difficult to solve using existing NCO methods. In this paper, we present the Feasibility-Aware Masked Transformer (FAM-Trans) specialized for

Cited by 0SourcePDFScholar
2026

Strategic Tool Enhanced AI Agent for Multi-Issue Negotiation (Student Abstract)

AAAI 2026technical

Automated negotiation, a form of interaction among autonomous agents, plays a central role in multi-agent systems, yet the application of large language model (LLM) in this domain remains underexplored. An LLM can serve as a meta-strategist, adaptively selecting explicit strategies for execution by

Cited by 0SourcePDFScholar
2024

Coordination of Emergent Demand Changes via Value-Based Negotiation for Supply Chain Management (Student Abstract)

AAAI 2024technical

We propose an automated negotiation for a reinforcement learning agent to adapt the agent to unexpected situations such as demand changes in supply chain management (SCM). Existing studies that consider reinforcement learning and SCM assume a centralized environment where the coordination of chain c…

Cited by 0SourcePDFScholar
2024

Dual-Process Optimization for Multi-Vehicle Route Planning and Parts Collection Sequencing

IROS 2024poster

We proposed a novel dual-process optimization approach for parts collection order and route planning in parts warehouses. Conventional multi-agent parts collection typically uses the vehicle routing problem (VRP), which focuses on minimizing the number of agents and costs. However, the model does no…

Cited by 0SourceScholar
2023

Reward-Based Negotiating Agent Strategies

AAAI 2023technical

This study proposed a novel reward-based negotiating agent strategy using an issue-based represented deep policy network. We compared the negotiation strategies with reinforcement learning (RL) by the tournaments toward heuristics-based champion agents in multi-issue negotiation. A bilateral multi-i…

Cited by 10SourcePDFScholar
2023

Scalable Negotiating Agent Strategy via Multi-Issue Policy Network (Student Abstract)

AAAI 2023technical

Previous research on the comprehensive negotiation strategy using deep reinforcement learning (RL) has scalability issues of not performing effectively in the large-sized domains. We improve negotiation strategy via deep RL by considering an issue-based represented deep policy network to deal with m…

Cited by 1SourcePDFScholar
2020

Path Negotiation for Self-interested Multirobot Vehicles in Shared Space

IROS 2020poster

This paper addresses the problem of path negotiation among self-interested multirobot operators in shared space. In conventional multirobot path planning problems, most of the research thus far has focused on the coordination and planning of collision-free paths for multiple robots with some common…

Cited by 13SourceScholar