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您的检索式：作者名="Ebrahim Emami"
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| 1 | A state-of-the-art review of automated extraction of rock mass discontinuity characteristics using three-dimensional surface models显示文摘In the last two decades,significant research has been conducted in the field of automated extraction of rock mass discontinuity characteristics from three-dimensional(3D)models.This provides several methodologies for acquiring discontinuity measurements from 3D models,such as point clouds generated using laser scanning or photogrammetry.However,even with numerous automated and semiautomated methods presented in the literature,there is not one single method that can automatically characterize discontinuities accurately in a minimum of time.In this paper,we critically review all the existing methods proposed in the literature for the extraction of discontinuity characteristics such as joint sets and orientations,persistence,joint spacing,roughness and block size using point clouds,digital elevation maps,or meshes.As a result of this review,we identify the strengths and drawbacks of each method used for extracting those characteristics.We found that the approaches based on voxels and region growing are superior in extracting joint planes from 3D point clouds.Normal tensor voting with trace growth algorithm is a robust method for measuring joint trace length from 3D meshes.Spacing is estimated by calculating the perpendicular distance between joint planes.Several independent roughness indices are presented to quantify roughness from 3D surface models,but there is a need to incorporate these indices into automated methodologies.There is a lack of efficient algorithms for direct computation of block size from 3D rock mass surface models. | Rushikesh Battulwar Masoud Zare-Naghadehi Ebrahim Emami Javad Sattarvand | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，4： | 3 |
| 2 | An animal model study for repair of tracheal defects with autologous stem cells and differentiated chondrocytes from adipose-derived stem cells显示文摘 | Batool Hashemibeni Vahid Goharian Ebrahim Esfandiari Farzaneh Sadeghi Farzaneh Fasihi Razie Alipur Ali Valiani Masoud Ghorbani Zahra Motavali Emami Fatemeh Shabani Maryam Goharian | 2012 | Journal of Pediatric Surgery2012，，11： | 1 |
| 3 | An animal model study for repair of tracheal defects with autologous stem cells and differentiated chondrocytes from adipose-derived stem cells显示文摘 | Batool Hashemibeni Vahid Goharian Ebrahim Esfandiari Farzaneh Sadeghi Farzaneh Fasihi Razie Alipur Ali Valiani Masoud Ghorbani Zahra Motavali Emami Fatemeh Shabani Maryam Goharian | 2012 | Journal of Pediatric Surgery2012，，11： | 1 |
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