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A reranker reorders a candidate set from an initial retriever, often using a richer query-document scoring model.
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It cannot recover documents missing from that set.
A two-stage retrieval system first retrieves candidates, then reranks them. Cross-encoders jointly process query and candidate text and can be computationally expensive across very large corpora; bi-encoders produce separate embeddings that support efficient initial retrieval. Listwise methods score multiple candidates together. A reranker cannot promote a document absent from the candidate set, and its score is not automatically a probability of relevance. Claims about universal accuracy gains or reduced hallucinations require task-specific evaluation. A named example is Nogueira and Cho’s Passage Re-ranking with BERT, which applies BERT to query-based passage re-ranking and reports results on TREC-CAR and MS MARCO. This example does not establish the prevalence of any architecture across all reranking systems.
Retrieve a small candidate set, then rerank it for a question.
Measure retrieval recall and reranking quality separately.
Use query-document scoring to reorder retrieved passages.
Check the cited source passages before using results in a generated answer.
Reranking methods and model sizes continue to change. Benchmark latency and quality on the actual corpus and query set; treat product comparisons and future accuracy gains as hypotheses until measured.
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A reranker reorders a candidate set from an initial retriever, often using a richer query-document scoring model. It cannot recover documents missing from that set.
Retriever cepat mengambil calon; penaraf semula kemudiannya menjaringkan semula senarai pendek itu untuk menolak hasil yang paling berkaitan ke bahagian atas.
The paper reports results on TREC-CAR as well as the MS MARCO passage retrieval task. This is a result reported for that study, not a general reranker benchmark claim.
Tidak seperti benam yang boleh dikira sebelumnya, pengekod silang mesti menjalankan pas pengubah penuh bagi setiap pasangan, jadi ia dikhaskan untuk senarai pendek kecil.
Pengekod dwi membenamkan dokumen secara bebas dan lebih awal, membolehkan carian persamaan pantas merentas koleksi besar.
Reranking reorders candidates by model-estimated relevance; the candidate pool and scoring errors still limit what reaches the generator.
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Ujian A/B untuk Model ML
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