{"id":"W2941718354","doi":"10.1115/1.4043564","title":"Torsional Vibrations and Nonlinear Dynamic Characteristics of Drill Strings and Stick-Slip Reduction Mechanism","year":2019,"lang":"en","type":"article","venue":"Journal of Computational and Nonlinear Dynamics","topic":"Drilling and Well Engineering","field":"Engineering","cited_by":33,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Regina","funders":"","keywords":"Drill string; Torsional vibration; Vibration; Drilling; Slip (aerodynamics); Engineering; Nonlinear system; Drill; Structural engineering; Reduction (mathematics); Rotational speed; Drill pipe; Mechanical engineering; Acoustics; Physics; Mathematics; Geometry","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":[0.0001481494,0.0001240935,0.0002410369,0.00015709,0.00003919065,0.00003197814,0.0000451021,0.00006874199,0.000005210002],"category_scores_gemma":[0.00001816301,0.0001200359,0.00003760901,0.0000831962,0.00003552013,0.0001718291,0.00002393615,0.0001886597,8.638788e-7],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00003812765,"about_ca_system_score_gemma":0.00003572345,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.000001735394,"about_ca_topic_score_gemma":0.000001042776,"domain_scores_codex":[0.9992164,0.00001006811,0.0003960346,0.00009168803,0.0001859647,0.00009980463],"domain_scores_gemma":[0.9994764,0.0001012578,0.0001372331,0.00004582671,0.0001550855,0.000084163],"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":[0.00007500794,0.00008936333,0.001757358,0.000535975,0.0002202882,0.000008389909,0.0004133355,0.9587027,0.005947632,0.005699083,0.00001332561,0.02653754],"study_design_scores_gemma":[0.0003816966,0.0001114229,0.007932997,0.0001078677,0.00003374671,0.000220214,0.00006542943,0.9890947,0.00009276998,0.001760338,0.00008072095,0.0001180342],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8943112,0.0001700119,0.1048811,0.00007525429,0.0003982116,0.00005706045,0.00006556597,0.00001871216,0.00002277808],"genre_scores_gemma":[0.9472263,0.0003463365,0.05218362,0.000007592884,0.0001301688,3.263116e-7,0.000053458,0.00002008583,0.00003214573],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.05291501,"threshold_uncertainty_score":0.4894921,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.002606215293140755,"score_gpt":0.1848349522019316,"score_spread":0.1822287369087909,"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."}}