EncyclopedAI

Retrieving "Semantic Relationships" from the archives

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  1. Information Retrieval

    Linked via "semantic relationships"

    | Ranking Function | Primary Mechanism | Key Limitation |
    | :--- | :--- | :--- |
    | $\text{TF-IDF}$ | Term frequency scaled by collection rarity | Ignores semantic relationships |
    | BM25 (Okapi) | Probabilistic model incorporating term saturation | Highly sensitive to document length normalization constants $\left(k_1, b\right)$ |
    | $\text{ECR}$ | Graph centrality within the document collection | Requires the entire collection structure to be recomputed weekly |