Bibliographic record
Abstract
PreviousNext No AccessSEG Technical Program Expanded Abstracts 2002Optimal Zoeppritz approximationsAuthors: Charles P. UrsenbachCharles P. UrsenbachCREWES, The University of Calgaryhttps://doi.org/10.1190/1.1817060 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1817060FiguresReferencesRelatedDetailsCited byNonlinear AVO inversion based on Zoeppritz equations to estimate density, P- and S-wave velocities, and the ratio of velocities: Case study of Gulf of MexicoUn Young Lim, Richard L. Gibson, and Nurul Kabir10 August 2019Application of extended elastic impedance in seismic geomechanicsJavad Sharifi, Naser Hafezi Moghaddas, Gholam Reza Lashkaripour, Abdolrahim Javaherian, and Marzieh Mirzakhanian10 April 2019 | GEOPHYSICS, Vol. 84, No. 3Imperialist competitive algorithm optimization method for nonlinear amplitude variation with angle inversionAmir Mollajan, Hossein Memarian, and Beatriz Quintal8 April 2019 | GEOPHYSICS, Vol. 84, No. 3Application of pseudolinear Zoeppritz equation in the prediction of CBM "sweet spot"Yinping Dong, Jianqing Wang, Zhongbin Tian, and Youyi Shen27 August 2018Second-order perturbation approximation of reflection based on scattering-matrix decompositionCheng-cheng Gong, Guo-chen Wu, and Jun-zhen Shan27 August 2018Amplitude variation with angle inversion using the exact Zoeppritz equations — Theory and methodologyLixia Zhi, Shuangquan Chen, and Xiang-yang Li18 February 2016 | GEOPHYSICS, Vol. 81, No. 2An inversion method for seafloor elastic parametersYangting Liu, Umberta Tinivella, and Xuewei Liu23 April 2015 | GEOPHYSICS, Vol. 80, No. 3Joint AVO Inversion of PP and PS waves using exact Zoeppritz equationLixia Zhi, Shuangquan Chen, and Xiang-yang Li19 August 2013AVO inversion using the Zoeppritz equation for PP reflectionsXinfa Zhu and George McMechan25 October 2012A non‐linear, three‐parameter AVO method that can be solved non‐iterativelyChuck Ursenbach3 January 2005 SEG Technical Program Expanded Abstracts 2002ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2002 Pages: 2478 publication data© 2002 Copyright © 2002 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 03 Jan 2005 CITATION INFORMATION Charles P. Ursenbach, (2002), "Optimal Zoeppritz approximations," SEG Technical Program Expanded Abstracts : 1897-1900. https://doi.org/10.1190/1.1817060 Plain-Language Summary PDF DownloadLoading ...
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.007 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.013 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".