{"id":"https://openalex.org/W7165667969","doi":"https://doi.org/10.1109/iccps68698.2026.00018","title":"LexiSafe: Offline Safe Reinforcement Learning with Lexicographic Safety-Reward Hierarchy","display_name":"LexiSafe: Offline Safe Reinforcement Learning with Lexicographic Safety-Reward Hierarchy","publication_year":2026,"publication_date":"2026-05-11","ids":{"openalex":"https://openalex.org/W7165667969","doi":"https://doi.org/10.1109/iccps68698.2026.00018"},"language":null,"primary_location":{"id":"doi:10.1109/iccps68698.2026.00018","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iccps68698.2026.00018","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 ACM/IEEE 17th International Conference on Cyber-Physical Systems (ICCPS)","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5101767629","display_name":"Hsin-Jung Yang","orcid":"https://orcid.org/0000-0001-8395-5993"},"institutions":[{"id":"https://openalex.org/I173911158","display_name":"Iowa State University","ror":"https://ror.org/04rswrd78","country_code":"US","type":"education","lineage":["https://openalex.org/I173911158"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Hsin-Jung Yang","raw_affiliation_strings":["Iowa State University,Dept. of Mechanical Engineering,Ames,USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Iowa State University,Dept. of Mechanical Engineering,Ames,USA","institution_ids":["https://openalex.org/I173911158"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5031212270","display_name":"Zhanhong Jiang","orcid":"https://orcid.org/0000-0001-5363-7898"},"institutions":[{"id":"https://openalex.org/I173911158","display_name":"Iowa State University","ror":"https://ror.org/04rswrd78","country_code":"US","type":"education","lineage":["https://openalex.org/I173911158"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Zhanhong Jiang","raw_affiliation_strings":["Iowa State University,Translational AI Center,Ames,USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Iowa State University,Translational AI Center,Ames,USA","institution_ids":["https://openalex.org/I173911158"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109676911","display_name":"Prajwal Koirala","orcid":null},"institutions":[{"id":"https://openalex.org/I205783295","display_name":"Cornell University","ror":"https://ror.org/05bnh6r87","country_code":"US","type":"education","lineage":["https://openalex.org/I205783295"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Prajwal Koirala","raw_affiliation_strings":["Cornell University,Sibley School of Mechanical and Aerospace Engineering,Ithaca,USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Cornell University,Sibley School of Mechanical and Aerospace Engineering,Ithaca,USA","institution_ids":["https://openalex.org/I205783295"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010702633","display_name":"Qisai Liu","orcid":"https://orcid.org/0000-0002-9553-0789"},"institutions":[{"id":"https://openalex.org/I173911158","display_name":"Iowa State University","ror":"https://ror.org/04rswrd78","country_code":"US","type":"education","lineage":["https://openalex.org/I173911158"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Qisai Liu","raw_affiliation_strings":["Iowa State University,Dept. of Mechanical Engineering,Ames,USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Iowa State University,Dept. of Mechanical Engineering,Ames,USA","institution_ids":["https://openalex.org/I173911158"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5122847164","display_name":"Cody Fleming","orcid":null},"institutions":[{"id":"https://openalex.org/I173911158","display_name":"Iowa State University","ror":"https://ror.org/04rswrd78","country_code":"US","type":"education","lineage":["https://openalex.org/I173911158"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Cody Fleming","raw_affiliation_strings":["Iowa State University,Dept. of Mechanical Engineering,Ames,USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Iowa State University,Dept. of Mechanical Engineering,Ames,USA","institution_ids":["https://openalex.org/I173911158"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5133472864","display_name":"S K Nasrin Sultana Raj Sarkar","orcid":null},"institutions":[{"id":"https://openalex.org/I173911158","display_name":"Iowa State University","ror":"https://ror.org/04rswrd78","country_code":"US","type":"education","lineage":["https://openalex.org/I173911158"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Soumik Sarkar","raw_affiliation_strings":["Iowa State University,Dept. of Mechanical Engineering,Ames,USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Iowa State University,Dept. of Mechanical Engineering,Ames,USA","institution_ids":["https://openalex.org/I173911158"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"106","last_page":"117"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10462","display_name":"Reinforcement Learning in Robotics","score":0.42100000381469727,"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/T10462","display_name":"Reinforcement Learning in Robotics","score":0.42100000381469727,"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/T11689","display_name":"Adversarial Robustness in Machine Learning","score":0.11909999698400497,"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/T11652","display_name":"Imbalanced Data Classification Techniques","score":0.030899999663233757,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/reinforcement-learning","display_name":"Reinforcement learning","score":0.5253999829292297},{"id":"https://openalex.org/keywords/lexicographical-order","display_name":"Lexicographical order","score":0.5008999705314636},{"id":"https://openalex.org/keywords/hierarchy","display_name":"Hierarchy","score":0.4878999888896942},{"id":"https://openalex.org/keywords/key","display_name":"Key (lock)","score":0.31529998779296875},{"id":"https://openalex.org/keywords/control","display_name":"Control (management)","score":0.2985000014305115}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5633999705314636},{"id":"https://openalex.org/C97541855","wikidata":"https://www.wikidata.org/wiki/Q830687","display_name":"Reinforcement learning","level":2,"score":0.5253999829292297},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5249000191688538},{"id":"https://openalex.org/C159254197","wikidata":"https://www.wikidata.org/wiki/Q1144915","display_name":"Lexicographical order","level":2,"score":0.5008999705314636},{"id":"https://openalex.org/C31170391","wikidata":"https://www.wikidata.org/wiki/Q188619","display_name":"Hierarchy","level":2,"score":0.4878999888896942},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.3203999996185303},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.31529998779296875},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.2985000014305115},{"id":"https://openalex.org/C2777212361","wikidata":"https://www.wikidata.org/wiki/Q5127848","display_name":"Class (philosophy)","level":2,"score":0.27720001339912415},{"id":"https://openalex.org/C112972136","wikidata":"https://www.wikidata.org/wiki/Q7595718","display_name":"Stability (learning theory)","level":2,"score":0.265500009059906},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2500999867916107}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/iccps68698.2026.00018","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iccps68698.2026.00018","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 ACM/IEEE 17th International Conference on Cyber-Physical Systems (ICCPS)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W2795276745","https://openalex.org/W3046384803","https://openalex.org/W3123348991","https://openalex.org/W3127561923","https://openalex.org/W3138939485","https://openalex.org/W3162079807","https://openalex.org/W3185083385","https://openalex.org/W3203076355","https://openalex.org/W3211583675","https://openalex.org/W3216656735","https://openalex.org/W4225405716","https://openalex.org/W4285603402","https://openalex.org/W4312435357","https://openalex.org/W4402167856","https://openalex.org/W4402402057","https://openalex.org/W4403487049","https://openalex.org/W4405362916","https://openalex.org/W4409347217","https://openalex.org/W4415795780","https://openalex.org/W4415796419","https://openalex.org/W7124348985","https://openalex.org/W7133205794","https://openalex.org/W7133221257","https://openalex.org/W7133258224"],"related_works":[],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2026-06-24T00:00:00"}
