1Cademy - Bidirectional Diffusion Hyperparameter Settings (LectureBank-Full Main Runs)

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Method Part 2: Adaptive Depth Gating for Prerequisite Retrieval (Auditable Strict-Parity Graph-RAG Paper)
Method Part 1: Bidirectional Prerequisite Diffusion with Role-Aware (Auditable Strict-Parity Graph-RAG Paper)
Bidirectional Diffusion (Method) in Auditable Strict-Parity Evaluation of Prerequisite-Graph Retrieval for RAG under Leakage Controls

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Bidirectional Diffusion Hyperparameter Settings (LectureBank-Full Main Runs)

The paper's main bidirectional-diffusion experiments fix the following hyperparameters. Base traversal depths: $d_\uparrow^{(0)} = 6$ (ancestors) and $d_\downarrow^{(0)} = 2$ (descendants). Adaptive-controller thresholds on the top seed's hierarchy level: $(\tau_{\text{low}}, \tau_{\text{high}}) = (2, 5)$ . Adaptive-controller thresholds on the dense-score contrast $\Delta = s_1 - s_5$ : $(\gamma_{\text{low}}, \gamma_{\text{high}}) = (0.05, 0.15)$ . Per-hop penalties: $\delta = 0.03$ (upward) and $\delta_{\text{child}} = 0.025$ (downward). The asymmetries $d_\uparrow^{(0)} > d_\downarrow^{(0)}$ and $\delta > \delta_{\text{child}}$ bias the policy toward deeper but more strongly hop-penalized ancestor traversal than descendant traversal.

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Updated 2026-05-17

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Reference: Auditable Strict-Parity Evaluation of Prerequisite-Graph Retrieval for RAG under Leakage Controls

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