{"id":"https://openalex.org/W4412945093","doi":"https://doi.org/10.18653/v1/2025.acl-long.871","title":"Optimizing Question Semantic Space for Dynamic Retrieval-Augmented Multi-hop Question Answering","display_name":"Optimizing Question Semantic Space for Dynamic Retrieval-Augmented Multi-hop Question Answering","publication_year":2025,"publication_date":"2025-01-01","ids":{"openalex":"https://openalex.org/W4412945093","doi":"https://doi.org/10.18653/v1/2025.acl-long.871"},"language":"en","primary_location":{"id":"doi:10.18653/v1/2025.acl-long.871","is_oa":true,"landing_page_url":"https://doi.org/10.18653/v1/2025.acl-long.871","pdf_url":"https://aclanthology.org/2025.acl-long.871.pdf","source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://aclanthology.org/2025.acl-long.871.pdf","any_repository_has_fulltext":null},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5081540457","display_name":"L.X. Ye","orcid":null},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Linhao Ye","raw_affiliation_strings":["School of Computer Science and Technology , East China Normal University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Technology , East China Normal University","institution_ids":["https://openalex.org/I66867065"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100758676","display_name":"Lang Yu","orcid":"https://orcid.org/0000-0002-9083-5313"},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Lang Yu","raw_affiliation_strings":["School of Computer Science and Technology , East China Normal University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Technology , East China Normal University","institution_ids":["https://openalex.org/I66867065"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100574563","display_name":"Zhikai Lei","orcid":"https://orcid.org/0000-0002-7952-1401"},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Zhikai Lei","raw_affiliation_strings":["School of Computer Science and Technology , East China Normal University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Technology , East China Normal University","institution_ids":["https://openalex.org/I66867065"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5082012643","display_name":"Qin Chen","orcid":"https://orcid.org/0000-0002-4956-3635"},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Qin Chen","raw_affiliation_strings":["School of Computer Science and Technology , East China Normal University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Technology , East China Normal University","institution_ids":["https://openalex.org/I66867065"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102306227","display_name":"Jie Zhou","orcid":null},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jie Zhou","raw_affiliation_strings":["School of Computer Science and Technology , East China Normal University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Technology , East China Normal University","institution_ids":["https://openalex.org/I66867065"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5010540039","display_name":"Liang He","orcid":"https://orcid.org/0000-0002-4723-5486"},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Liang He","raw_affiliation_strings":["School of Computer Science and Technology , East China Normal University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Technology , East China Normal University","institution_ids":["https://openalex.org/I66867065"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I66867065"],"apc_list":null,"apc_paid":null,"fwci":1.6508,"has_fulltext":true,"cited_by_count":1,"citation_normalized_percentile":{"value":0.87309638,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":95,"max":97},"biblio":{"volume":null,"issue":null,"first_page":"17814","last_page":"17824"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10028","display_name":"Topic Modeling","score":0.9567999839782715,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10028","display_name":"Topic Modeling","score":0.9567999839782715,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13382","display_name":"Robotics and Automated Systems","score":0.9438999891281128,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/question-answering","display_name":"Question answering","score":0.8527235984802246},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7856566905975342},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.7406666278839111},{"id":"https://openalex.org/keywords/hop","display_name":"Hop (telecommunications)","score":0.5510863661766052},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.35439926385879517},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.13688352704048157}],"concepts":[{"id":"https://openalex.org/C44291984","wikidata":"https://www.wikidata.org/wiki/Q1074173","display_name":"Question answering","level":2,"score":0.8527235984802246},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7856566905975342},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.7406666278839111},{"id":"https://openalex.org/C25906391","wikidata":"https://www.wikidata.org/wiki/Q1432381","display_name":"Hop (telecommunications)","level":2,"score":0.5510863661766052},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.35439926385879517},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.13688352704048157}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.18653/v1/2025.acl-long.871","is_oa":true,"landing_page_url":"https://doi.org/10.18653/v1/2025.acl-long.871","pdf_url":"https://aclanthology.org/2025.acl-long.871.pdf","source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)","raw_type":"proceedings-article"}],"best_oa_location":{"id":"doi:10.18653/v1/2025.acl-long.871","is_oa":true,"landing_page_url":"https://doi.org/10.18653/v1/2025.acl-long.871","pdf_url":"https://aclanthology.org/2025.acl-long.871.pdf","source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)","raw_type":"proceedings-article"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G384178317","display_name":null,"funder_award_id":"02008","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G7864132582","display_name":null,"funder_award_id":"62307028","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320309612","display_name":"Natural Science Foundation of Shanghai","ror":null},{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W4412945093.pdf","grobid_xml":"https://content.openalex.org/works/W4412945093.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W2384605597","https://openalex.org/W2387743295","https://openalex.org/W2117210722","https://openalex.org/W2589759689","https://openalex.org/W3082787378","https://openalex.org/W2136007095","https://openalex.org/W2366230879"],"abstract_inverted_index":{"Retrieval-augmented":[0],"generation":[1],"(RAG)":[2],"is":[3],"usually":[4],"integrated":[5],"into":[6,71],"large":[7],"language":[8],"models":[9,82],"(LLMs)":[10],"to":[11],"mitigate":[12],"hallucinations":[13],"and":[14,33,91,128],"knowledge":[15],"obsolescence.Whereas,":[16],"conventional":[17],"onestep":[18],"retrieve-and-read":[19],"methods":[20],"are":[21],"insufficient":[22],"for":[23,49,88],"multi-hop":[24,69],"question":[25],"answering,":[26],"facing":[27],"challenges":[28],"of":[29,57,86],"retrieval":[30,134],"semantic":[31,108],"mismatching":[32],"the":[34,62,75,83,93,107],"high":[35,138],"cost":[36],"in":[37,125],"handling":[38],"interdependent":[39,84],"subquestions.In":[40],"this":[41],"paper,":[42],"we":[43],"propose":[44],"Optimizing":[45],"Question":[46,53,63],"Semantic":[47],"Space":[48],"Dynamic":[50,94],"Retrieval-Augmented":[51],"Multi-hop":[52],"Answering":[54],"(Q-DREAM).Q-DREAM":[55],"consists":[56],"three":[58],"key":[59],"modules:":[60],"(1)":[61],"Decomposition":[64],"Module":[65,79,97],"(QDM),":[66],"which":[67,81,99],"decomposes":[68],"questions":[70],"fine-grained":[72],"subquestions;":[73],"(2)":[74],"Subquestion":[76],"Dependency":[77],"Optimizer":[78],"(SDOM),":[80],"relations":[85],"subquestions":[87,101],"better":[89],"understanding;":[90],"(3)":[92],"Passage":[95],"Retrieval":[96],"(DPRM),":[98],"aligns":[100],"with":[102,141],"relevant":[103],"passages":[104],"by":[105],"optimizing":[106],"embeddings.Experimental":[109],"results":[110],"across":[111],"various":[112],"benchmarks":[113],"demonstrate":[114],"that":[115],"Q-DREAM":[116,131],"significantly":[117],"outperforms":[118],"existing":[119],"RAG":[120],"methods,":[121],"achieving":[122],"state-of-the-art":[123],"performance":[124],"both":[126],"in-domain":[127],"out-of-domain":[129],"settings.Notably,":[130],"also":[132],"improves":[133],"efficiency":[135],"while":[136],"maintaining":[137],"accuracy":[139],"compared":[140],"recent":[142],"baselines.":[143]},"counts_by_year":[{"year":2026,"cited_by_count":1}],"updated_date":"2026-06-26T08:34:08.712188","created_date":"2025-10-10T00:00:00"}