{"id":"W1995061818","doi":"10.1590/s1678-58782012000200014","title":"Approximate expressions for the reflection coefficient of ducts terminated by circular flanges","year":2012,"lang":"en","type":"article","venue":"Journal of the Brazilian Society of Mechanical Sciences and Engineering","topic":"Acoustic Wave Phenomena Research","field":"Engineering","cited_by":36,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"Conselho Nacional de Desenvolvimento Científico e Tecnológico; McGill University","keywords":"Flange; Mathematical analysis; Helmholtz free energy; Reflection coefficient; Polynomial; Boundary value problem; Reflection (computer programming); Mathematics; Boundary (topology); Finite element method; Geometry; Plane (geometry); Physics; Optics; Structural engineering; Engineering","routes":{"ca_aff":false,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0006447211,0.0006671955,0.0004591367,0.0005993907,0.0001866919,0.0007982449,0.0009322469,0.0008273547,0.00187763],"category_scores_gemma":[0.003518097,0.0003290316,0.0004481964,0.0005140709,0.0005241363,0.001255128,0.0004700094,0.0004897054,0.001200494],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0004956541,"about_ca_system_score_gemma":0.0004783547,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0009758115,"about_ca_topic_score_gemma":0.000989651,"domain_scores_codex":[0.9995586,0.00008115038,0.0000354657,0.00009222372,0.0001829909,0.00004941759],"domain_scores_gemma":[0.9988078,0.000570608,0.0002060009,0.0001513969,0.0002448291,0.00001937477],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"simulation_or_modeling","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.0001871875,0.0001096244,0.002686065,0.0008273847,0.00003637848,0.0005049845,0.0007028659,0.6520597,0.1856929,0.0639798,0.001068093,0.09214513],"study_design_scores_gemma":[0.00001312413,0.00007179208,0.0009296981,0.00006754162,0.00001836949,0.0002772964,0.0001284072,0.9554108,0.03287717,0.006911569,0.003258943,0.00003535312],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"methods","genre_gemma":"empirical","genre_scores_codex":[0.08009041,0.0005206472,0.9089156,0.00006773063,0.00002815208,0.00004859347,0.0001598995,0.0005954219,0.009573606],"genre_scores_gemma":[0.665815,0.001250069,0.324204,0.00007834017,0.00002890473,0.0002245859,0.0003257677,0.0003575757,0.007715744],"genre_candidate":"empirical","genre_consensus":null,"teacher_disagreement_score":0.00187763,"threshold_uncertainty_score":0.006281316,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02274360192579418,"score_gpt":0.2684212049704678,"score_spread":0.2456776030446737,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}