A Fine-Tuning Aggregation Convolutional Neural Network Surrogate Model of Strategy Selecting Mechanism for Repeated-Encounter Bilateral Automated Negotiation Topics: Deep Learning; Group Decision Making (with cooperation, coordination, negotiation, interaction protocols); Multi-Agent Systems; Neural Networks In Proceedings of the 15th International Conference on Agents and Artificial Intelligence - Volume 2: ICAART, 277-288, 2023 , Lisbon, Portugal