{"id":"W2700113477","doi":"10.1016/j.jsv.2017.06.016","title":"Investigation on random vibration of a drillstring","year":2017,"lang":"en","type":"article","venue":"Journal of Sound and Vibration","topic":"Drilling and Well Engineering","field":"Engineering","cited_by":32,"is_retracted":false,"has_abstract":false,"ca_institutions":"Memorial University of Newfoundland","funders":"","keywords":"Drill string; Random vibration; Finite element method; Vibration; Displacement (psychology); White noise; Drill bit; Mathematics; Newmark-beta method; Gaussian; Randomness; Mathematical analysis; Physics; Structural engineering; Engineering; Acoustics; Drill; Statistics; Mechanical engineering","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001853046,0.00006082579,0.0001215235,0.00008319221,0.00008224546,0.00008894797,0.00005112676,0.00004073787,0.000002246175],"category_scores_gemma":[0.00007071067,0.00005350137,0.00003309319,0.000023316,0.00001977275,0.0004619349,0.000004719856,0.00008568857,6.77757e-7],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00001325758,"about_ca_system_score_gemma":0.000007057321,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.000001952102,"about_ca_topic_score_gemma":0.000001695313,"domain_scores_codex":[0.9995613,0.000007566715,0.0002332331,0.00003730664,0.0001071213,0.00005352279],"domain_scores_gemma":[0.9996365,0.00003519934,0.0001688169,0.00007872201,0.00004301492,0.00003774531],"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":[0.000118231,0.00001715592,0.005650597,0.0002818083,0.0001142371,0.000004871797,0.001546558,0.6951978,0.2754047,0.002809264,0.0001928872,0.01866187],"study_design_scores_gemma":[0.003486208,0.0003891432,0.03287774,0.0007572763,0.00007614321,0.00004331408,0.0001568055,0.6392974,0.3132624,0.00892023,0.0004254045,0.0003079169],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8632953,0.0001184139,0.1355831,0.00006312346,0.0003627521,0.00003630678,9.328064e-7,0.00001584238,0.0005241529],"genre_scores_gemma":[0.9988229,0.0001051502,0.0008270119,0.000008585946,0.000218897,3.444899e-7,0.00000140598,0.000008468513,0.000007216172],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1355276,"threshold_uncertainty_score":0.2181723,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02117427430068483,"score_gpt":0.2168220731458641,"score_spread":0.1956477988451792,"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."}}