{"id":"https://openalex.org/W2996014667","doi":"https://doi.org/10.1109/access.2019.2960468","title":"A Novel Hierarchical Topic Model for Horizontal Topic Expansion With Observed Label Information","display_name":"A Novel Hierarchical Topic Model for Horizontal Topic Expansion With Observed Label Information","publication_year":2019,"publication_date":"2019-01-01","ids":{"openalex":"https://openalex.org/W2996014667","doi":"https://doi.org/10.1109/access.2019.2960468","mag":"2996014667"},"language":"en","primary_location":{"id":"doi:10.1109/access.2019.2960468","is_oa":true,"landing_page_url":"https://doi.org/10.1109/access.2019.2960468","pdf_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08936331.pdf","source":{"id":"https://openalex.org/S2485537415","display_name":"IEEE Access","issn_l":"2169-3536","issn":["2169-3536"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Access","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08936331.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5102823514","display_name":"Xi Zou","orcid":"https://orcid.org/0000-0002-8793-5954"},"institutions":[{"id":"https://openalex.org/I163340411","display_name":"Hohai University","ror":"https://ror.org/01wd4xt90","country_code":"CN","type":"education","lineage":["https://openalex.org/I163340411"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Xi Zou","raw_affiliation_strings":["School of Computer and Information, Hohai University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer and Information, Hohai University, Nanjing, China","institution_ids":["https://openalex.org/I163340411"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100605236","display_name":"Yuelong Zhu","orcid":"https://orcid.org/0000-0001-7194-260X"},"institutions":[{"id":"https://openalex.org/I163340411","display_name":"Hohai University","ror":"https://ror.org/01wd4xt90","country_code":"CN","type":"education","lineage":["https://openalex.org/I163340411"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yuelong Zhu","raw_affiliation_strings":["School of Computer and Information, Hohai University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer and Information, Hohai University, Nanjing, China","institution_ids":["https://openalex.org/I163340411"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101844109","display_name":"Jun Feng","orcid":"https://orcid.org/0000-0002-2627-5403"},"institutions":[{"id":"https://openalex.org/I163340411","display_name":"Hohai University","ror":"https://ror.org/01wd4xt90","country_code":"CN","type":"education","lineage":["https://openalex.org/I163340411"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jun Feng","raw_affiliation_strings":["School of Computer and Information, Hohai University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer and Information, Hohai University, Nanjing, China","institution_ids":["https://openalex.org/I163340411"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036273604","display_name":"Jiamin Lu","orcid":"https://orcid.org/0000-0002-0643-0736"},"institutions":[{"id":"https://openalex.org/I163340411","display_name":"Hohai University","ror":"https://ror.org/01wd4xt90","country_code":"CN","type":"education","lineage":["https://openalex.org/I163340411"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jiamin Lu","raw_affiliation_strings":["School of Computer and Information, Hohai University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer and Information, Hohai University, Nanjing, China","institution_ids":["https://openalex.org/I163340411"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100731640","display_name":"Xiaodong Li","orcid":"https://orcid.org/0000-0001-6690-836X"},"institutions":[{"id":"https://openalex.org/I163340411","display_name":"Hohai University","ror":"https://ror.org/01wd4xt90","country_code":"CN","type":"education","lineage":["https://openalex.org/I163340411"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xiaodong Li","raw_affiliation_strings":["School of Computer and Information, Hohai University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer and Information, Hohai University, Nanjing, China","institution_ids":["https://openalex.org/I163340411"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5102823514"],"corresponding_institution_ids":["https://openalex.org/I163340411"],"apc_list":{"value":1850,"currency":"USD","value_usd":1850},"apc_paid":{"value":1850,"currency":"USD","value_usd":1850},"fwci":0.2894,"has_fulltext":true,"cited_by_count":7,"citation_normalized_percentile":{"value":0.682837,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"7","issue":null,"first_page":"184242","last_page":"184253"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10028","display_name":"Topic Modeling","score":0.9998000264167786,"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":0.9998000264167786,"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/T10181","display_name":"Natural Language Processing Techniques","score":0.9918000102043152,"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/T12016","display_name":"Web Data Mining and Analysis","score":0.9908999800682068,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/topic-model","display_name":"Topic model","score":0.8309273719787598},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7748947739601135},{"id":"https://openalex.org/keywords/latent-dirichlet-allocation","display_name":"Latent Dirichlet allocation","score":0.7666114568710327},{"id":"https://openalex.org/keywords/hierarchy","display_name":"Hierarchy","score":0.7304027080535889},{"id":"https://openalex.org/keywords/hierarchical-database-model","display_name":"Hierarchical database model","score":0.7141781449317932},{"id":"https://openalex.org/keywords/hierarchical-organization","display_name":"Hierarchical organization","score":0.5934206247329712},{"id":"https://openalex.org/keywords/hierarchical-dirichlet-process","display_name":"Hierarchical Dirichlet process","score":0.5839505195617676},{"id":"https://openalex.org/keywords/flexibility","display_name":"Flexibility (engineering)","score":0.5187757015228271},{"id":"https://openalex.org/keywords/process","display_name":"Process (computing)","score":0.5158050060272217},{"id":"https://openalex.org/keywords/hierarchical-control-system","display_name":"Hierarchical control system","score":0.49330225586891174},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.4271402359008789},{"id":"https://openalex.org/keywords/multilevel-model","display_name":"Multilevel model","score":0.4153675138950348},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.4081357717514038},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.40410664677619934},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.29149192571640015},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.08891475200653076}],"concepts":[{"id":"https://openalex.org/C171686336","wikidata":"https://www.wikidata.org/wiki/Q3532085","display_name":"Topic model","level":2,"score":0.8309273719787598},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7748947739601135},{"id":"https://openalex.org/C500882744","wikidata":"https://www.wikidata.org/wiki/Q269236","display_name":"Latent Dirichlet allocation","level":3,"score":0.7666114568710327},{"id":"https://openalex.org/C31170391","wikidata":"https://www.wikidata.org/wiki/Q188619","display_name":"Hierarchy","level":2,"score":0.7304027080535889},{"id":"https://openalex.org/C144986985","wikidata":"https://www.wikidata.org/wiki/Q871236","display_name":"Hierarchical database model","level":2,"score":0.7141781449317932},{"id":"https://openalex.org/C2780217385","wikidata":"https://www.wikidata.org/wiki/Q2389284","display_name":"Hierarchical organization","level":2,"score":0.5934206247329712},{"id":"https://openalex.org/C141318989","wikidata":"https://www.wikidata.org/wiki/Q5753066","display_name":"Hierarchical Dirichlet process","level":4,"score":0.5839505195617676},{"id":"https://openalex.org/C2780598303","wikidata":"https://www.wikidata.org/wiki/Q65921492","display_name":"Flexibility (engineering)","level":2,"score":0.5187757015228271},{"id":"https://openalex.org/C98045186","wikidata":"https://www.wikidata.org/wiki/Q205663","display_name":"Process (computing)","level":2,"score":0.5158050060272217},{"id":"https://openalex.org/C124527596","wikidata":"https://www.wikidata.org/wiki/Q17029359","display_name":"Hierarchical control system","level":3,"score":0.49330225586891174},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.4271402359008789},{"id":"https://openalex.org/C53059260","wikidata":"https://www.wikidata.org/wiki/Q374758","display_name":"Multilevel model","level":2,"score":0.4153675138950348},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.4081357717514038},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.40410664677619934},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.29149192571640015},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.08891475200653076},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C187736073","wikidata":"https://www.wikidata.org/wiki/Q2920921","display_name":"Management","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C34447519","wikidata":"https://www.wikidata.org/wiki/Q179522","display_name":"Market economy","level":1,"score":0.0},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/access.2019.2960468","is_oa":true,"landing_page_url":"https://doi.org/10.1109/access.2019.2960468","pdf_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08936331.pdf","source":{"id":"https://openalex.org/S2485537415","display_name":"IEEE Access","issn_l":"2169-3536","issn":["2169-3536"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Access","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:4b3e5c1c7c4b473cb64fdc3941f96698","is_oa":true,"landing_page_url":"https://doaj.org/article/4b3e5c1c7c4b473cb64fdc3941f96698","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"IEEE Access, Vol 7, Pp 184242-184253 (2019)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.1109/access.2019.2960468","is_oa":true,"landing_page_url":"https://doi.org/10.1109/access.2019.2960468","pdf_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08936331.pdf","source":{"id":"https://openalex.org/S2485537415","display_name":"IEEE Access","issn_l":"2169-3536","issn":["2169-3536"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Access","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/16","display_name":"Peace, Justice and strong institutions","score":0.47999998927116394}],"awards":[{"id":"https://openalex.org/G1023919524","display_name":null,"funder_award_id":", Grant","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G1121271761","display_name":null,"funder_award_id":"Program","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G1231421488","display_name":null,"funder_award_id":"under","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G1708461075","display_name":null,"funder_award_id":"XYN1702","funder_id":"https://openalex.org/F4320314326","funder_display_name":"Center for Cultural Innovation"},{"id":"https://openalex.org/G2087396116","display_name":null,"funder_award_id":"China","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G2376276132","display_name":null,"funder_award_id":"China","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G239633790","display_name":null,"funder_award_id":"61602151","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G3078124022","display_name":null,"funder_award_id":"2018YFC0407901","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G3317480652","display_name":null,"funder_award_id":"Science","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G3435950671","display_name":null,"funder_award_id":"and Gr","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G3681126194","display_name":null,"funder_award_id":"2018YFC040790","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G391238517","display_name":null,"funder_award_id":", and","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G466649759","display_name":null,"funder_award_id":"2017Y","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G4811743277","display_name":null,"funder_award_id":"2018YFC","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G4883260014","display_name":null,"funder_award_id":"61370091","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G5053610798","display_name":null,"funder_award_id":"2017YFC","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G5059415687","display_name":null,"funder_award_id":"2019B64614","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G5993219141","display_name":null,"funder_award_id":"2018YFC0407901","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G5994120800","display_name":null,"funder_award_id":"Natural","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G6029685585","display_name":null,"funder_award_id":"2018YFC0407901","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G6657443925","display_name":null,"funder_award_id":"61370091","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G70335489","display_name":null,"funder_award_id":"2017YFC0405806","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G7684600925","display_name":null,"funder_award_id":"2019B15514","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G8208342437","display_name":null,"funder_award_id":"1 and","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G8340078520","display_name":null,"funder_award_id":"2017YF","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G8676609639","display_name":null,"funder_award_id":"Jiangsu","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G8741888628","display_name":null,"funder_award_id":"61602149","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G8951484681","display_name":null,"funder_award_id":"Grant","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"}],"funders":[{"id":"https://openalex.org/F4320314326","display_name":"Center for Cultural Innovation","ror":null},{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320335777","display_name":"National Key Research and Development Program of China","ror":null},{"id":"https://openalex.org/F4320335787","display_name":"Fundamental Research Funds for the Central Universities","ror":null}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2996014667.pdf","grobid_xml":"https://content.openalex.org/works/W2996014667.grobid-xml"},"referenced_works_count":45,"referenced_works":["https://openalex.org/W5221400","https://openalex.org/W56136284","https://openalex.org/W263845233","https://openalex.org/W582033733","https://openalex.org/W1499913908","https://openalex.org/W1612003148","https://openalex.org/W1614298861","https://openalex.org/W1880262756","https://openalex.org/W2057923756","https://openalex.org/W2072644219","https://openalex.org/W2102150019","https://openalex.org/W2105179799","https://openalex.org/W2106490775","https://openalex.org/W2112050062","https://openalex.org/W2122678284","https://openalex.org/W2129250947","https://openalex.org/W2132827946","https://openalex.org/W2140124448","https://openalex.org/W2147152072","https://openalex.org/W2150286230","https://openalex.org/W2152677317","https://openalex.org/W2168332560","https://openalex.org/W2171343266","https://openalex.org/W2483632691","https://openalex.org/W2554262328","https://openalex.org/W2566640356","https://openalex.org/W2889964550","https://openalex.org/W2904746050","https://openalex.org/W2910828880","https://openalex.org/W2934070408","https://openalex.org/W2962686197","https://openalex.org/W4231510805","https://openalex.org/W4294170691","https://openalex.org/W6602324014","https://openalex.org/W6609746230","https://openalex.org/W6617084788","https://openalex.org/W6630061801","https://openalex.org/W6636440780","https://openalex.org/W6636510571","https://openalex.org/W6639619044","https://openalex.org/W6675295344","https://openalex.org/W6675687819","https://openalex.org/W6682660388","https://openalex.org/W6682691769","https://openalex.org/W6684485952"],"related_works":["https://openalex.org/W2939843948","https://openalex.org/W2116506662","https://openalex.org/W2615268635","https://openalex.org/W2077012825","https://openalex.org/W2500657027","https://openalex.org/W4206392734","https://openalex.org/W2996014667","https://openalex.org/W4206127979","https://openalex.org/W3037213697","https://openalex.org/W2905595484"],"abstract_inverted_index":{"Hierarchical":[0],"topic":[1,38,78,90,105,112,126,177],"models,":[2,183],"such":[3],"as":[4],"hierarchical":[5,30,49,61,81,104,111,121,140,192],"Latent":[6],"Dirichlet":[7],"Allocation":[8],"(hLDA)and":[9],"its":[10],"variations,":[11],"can":[12,41,186],"organize":[13],"topics":[14],"into":[15,36,124],"a":[16,46,102,173,189],"hierarchy":[17],"automatically.":[18],"On":[19],"the":[20,37,76,80,88,119,125,131,139,143,158,181],"other":[21],"hand,":[22],"there":[23],"are":[24,63],"lots":[25],"of":[26,133,138,160],"documents":[27],"associated":[28],"with":[29],"label":[31,122],"information.":[32],"Incorporating":[33],"these":[34,60],"information":[35,123],"modeling":[39,144],"process":[40],"help":[42],"users":[43],"to":[44,75,117,180],"obtain":[45,188],"more":[47,190],"reasonable":[48],"structure.":[50,193],"However,":[51],"after":[52],"analyzing":[53],"various":[54],"real-world":[55],"datasets,":[56],"we":[57,100],"find":[58],"that":[59,170],"labels":[62],"ambiguous":[64],"and":[65,73,79,109,135,152,156,184],"conflicting":[66],"in":[67,97,142],"some":[68],"levels,":[69],"which":[70,115],"introduces":[71],"error":[72],"restriction":[74],"latent":[77],"structure":[82,141],"exploration":[83],"process.":[84,145],"We":[85,146],"call":[86],"it":[87,185],"horizontal":[89,108,134],"expansion":[91,137],"problem.":[92],"To":[93],"address":[94],"this":[95,98],"problem,":[96],"paper,":[99],"propose":[101],"novel":[103],"model":[106,113],"named":[107],"vertical":[110,136],"(HV-HTM),":[114],"aims":[116],"incorporate":[118],"observed":[120],"generation":[127],"process,":[128],"while":[129],"keeping":[130],"flexibility":[132],"conduct":[147],"experiments":[148],"on":[149,162,176],"BBC":[150],"news":[151],"Yahoo!":[153],"Answers":[154],"datasets":[155],"evaluate":[157],"effectiveness":[159],"HV-HTM":[161,171],"three":[163],"evaluation":[164],"metrics.":[165],"The":[166],"experimental":[167],"results":[168],"show":[169],"has":[172],"significant":[174],"improvement":[175],"modeling,":[178],"compared":[179],"state-of-the-art":[182],"also":[187],"interpretable":[191]},"counts_by_year":[{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":3},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1}],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}