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TrajGenAgent proposes a hierarchical LLM agent framework that decouples macro-level activity planning from micro-level spatiotemporal instantiation for realistic human mobility trajectory generation without fine-tuning. It also introduces an anomaly-detection-based evaluation for behavioral fidelity.
This paper introduces HieraRAG, a hierarchical framework for determining optimal granularity in RAG benchmarks. It generates 5,872 synthetic QA pairs across three dimensions and finds that ideal granularity varies by dimension, offering a portable procedure for practitioners.