{"id":3924,"date":"2025-12-23T13:24:21","date_gmt":"2025-12-23T19:24:21","guid":{"rendered":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/?post_type=tribe_events&#038;p=3924"},"modified":"2026-01-30T10:32:14","modified_gmt":"2026-01-30T16:32:14","slug":"lans-seminar-190","status":"publish","type":"tribe_events","link":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/event\/lans-seminar-190\/","title":{"rendered":"LANS Seminar"},"content":{"rendered":"<p><strong>Seminar Title<\/strong>: Region of Interest Detection by Acquisition-Guided Sampling<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Speaker<\/strong>: Huiling Liao, Assistant Professor, Applied Mathematics, Illinois Institute of Technology<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Date:<\/strong> Thursday, February 26, 2026<\/p>\n<p><strong>Time:<\/strong> 2:30 PM-3:30 PM (In-Person)<\/p>\n<p><strong>Location:<\/strong> Hybrid, Bldg. 240, Conference Room 4301<\/p>\n<p><strong>Host:<\/strong> Alexis Montoison<\/p>\n<p>&nbsp;<\/p>\n<div class=\"tribe-events-single-event-description tribe-events-content\">\n<p><strong>Description<\/strong>: Motivated by the challenges in detecting extremely rare failures for sophisticated specifications in circuit design, we consider the problem of detecting regions of interest (ROIs) that consist of specifications with the value of a complex target function for the system performance being below or above a certain pre-specified threshold. Though Bayesian optimization (BO) has been applied to this problem, it is not effective in identifying multiple ROIs as it was originally designed for global optimization and tends to focus on searching the area where the global optimum is most likely to be. In this work, we propose a sampling strategy for fast ROI detection within a limited number of target function evaluations. The sampling distribution is designed so that the probability of a specification being sampled is proportional to the corresponding value of the acquisition function. Such an acquisition-guided sampling algorithm promotes a wider search of the sample space and a simpler incorporation of different criteria to determine the specifications to be evaluated next. To further improve the performance, we propose a new design of the acquisition function and two modifications of existing acquisition functions. Numerical studies on synthetic functions and a real-world circuit design application demonstrate that the proposed method can enjoy a stronger exploration ability provided by sampling and achieve faster ROI detection with higher coverage.<\/p>\n<p>&nbsp;<\/p>\n<p><b><span style=\"font-size: 12.0pt;font-family: 'Times New Roman',serif;color: #212121\">Bio: <\/span><\/b>Major in Statistics for Bachelor from Renmin University of China in 2015 and Ph.D in Statistics, Department of Statistics, Texas A&amp;M University in 2022. Before joining Illinois Tech, she was a Post-Doctoral Fellow with the Division of Biostatistics, University of Minnesota, Minneapolis, MN, USA. Her current research interests include machine learning and Bayesian computation, sequential decision-making, and causal inference.<\/p>\n<p>&nbsp;<\/p>\n<p><em>Please note that the meeting URL for this event can be seen on the cels-seminars website which requires an Argonne login.<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>See all upcoming talks at\u00a0<a href=\"https:\/\/www.anl.gov\/mcs\/lans-seminars\">https:\/\/www.anl.gov\/mcs\/lans-seminars<\/a><\/p>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seminar Title: Region of Interest Detection by Acquisition-Guided Sampling &nbsp; Speaker: Huiling Liao, Assistant Professor, Applied Mathematics, Illinois Institute of Technology &nbsp; Date: Thursday, February 26, 2026 Time: 2:30 PM-3:30 PM (In-Person) Location: Hybrid, Bldg. 240, Conference Room 4301 Host: &hellip; <a href=\"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/event\/lans-seminar-190\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":976,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[2],"class_list":["post-3924","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-seminar","cat_seminar"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/3924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/users\/976"}],"version-history":[{"count":4,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/3924\/revisions"}],"predecessor-version":[{"id":3944,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/3924\/revisions\/3944"}],"wp:attachment":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/media?parent=3924"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tags?post=3924"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events_cat?post=3924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}