CSMF sequentially fine-tunes a two-tower EBR model with selective parameter masks, then serves a weighted linear combination of exposure, click, and conversion scores from one 64-dimensional index, improving offline and online metrics without extra retrieval cost.
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CSMF: Cascaded Selective Mask Fine-Tuning for Multi-Objective Embedding-Based Retrieval
CSMF sequentially fine-tunes a two-tower EBR model with selective parameter masks, then serves a weighted linear combination of exposure, click, and conversion scores from one 64-dimensional index, improving offline and online metrics without extra retrieval cost.