Unverified50% confidenceBenchmarkExact time
On the NQ-Open dataset, the answer selector outperformed the filter on threshold average utility, but underperformed the "always abstain" baseline strategy.
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Long-term
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10/12/2026
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UnverifiedThe pragmatic approach is to first evaluate retrieval quality independently before connecting the generation stage: if the Top-K retrieved content does not contain the answer, switching to a stronger model cannot remedy the situation.71% similarUnverifiedFor large-scale datasets, cascading filters can reduce backend query pressure because each filter only needs to run on the subset of results from the previous level rather than performing a full table scan.67% similarUnverifiedThe choice of embedding model, chunking strategy (chunk size), and Top-K parameter tuning during retrieval all directly affect the answer quality of the knowledge base.67% similarUnverifiedMetadata filtering comes in two forms: pre-filtering, which uses structured fields to narrow the candidate set before vector computation for higher precision; and post-filtering, which recalls the Top-K results first and then filters them out—simpler to implement but potentially leaving insufficient usable results.66% similarUnverified向量数据库通常缺乏原生的行级权限支持，需要在相似度计算时附加元数据过滤条件66% similar
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