scholarly journals Three-dimensional rotational angiography of the left atrium and the oesophagus: the short-term mobility of the oesophagus and the stability of the fused three-dimensional model of the left atrium and the oesophagus during catheter ablation for atrial fibrillation

EP Europace ◽  
2016 ◽  
Vol 19 (8) ◽  
pp. 1310-1316 ◽  
Author(s):  
Zdenek Starek ◽  
Frantisek Lehar ◽  
Jiri Jez ◽  
Martin Scurek ◽  
Jiri Wolf ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
Left Atrium ◽  
Three Dimensional ◽  
Rotational Angiography ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Short Term ◽  
The Stability

An Improved Design of the Manipulator on Automatic Tool Changer

2012 ◽  
Vol 591-593 ◽  
pp. 259-262
Author(s):  
Yan Sheng Li ◽  
Yan Heng Zhang ◽  
Han Xu Sun ◽  
Hai Yang Dong ◽  
Shun Li Zhao
Keyword(s):  
Limit State ◽  
Three Dimensional ◽  
Output Curve ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Automatic Tool Changer ◽  
Automatic Tool ◽  
Improved Design ◽  
The Stability

The tool falling and vibration faults often occur in the process of tool changing, In order to improve the stability of the tools on automatic tool changer, a new structure of the manipulator is presented. The new manipulator contains two-point locking instead of the original one-point locking, and the tools can be clamped more tightly. When the old manipulator is slotting the tool, the forces are analyzed, and the working load and parameters is determined by calculating and analyzing the output curve of manipulator. The three-dimensional model is built in ADMS, and the validity of the new designed manipulator is verified by the simulation in a limit state. The simulation result shows that the new manipulator can increase the ability of tool clamping effectively.

scholarly journals Calibration of a Three-dimensional slope stability evaluation in Brazilian iron open pit mine

2021 ◽  
Author(s):  
Vidal Félix Navarro Torres ◽  
Rodrigo Dockendorff ◽  
Juan Manuel Girao Sotomayor ◽  
Cristian Castro ◽  
Aristotelina Ferreira da Silva
Keyword(s):  
Three Dimensional ◽  
Structural Features ◽  
Open Pit ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Strength Parameters ◽  
Dimensional Section ◽  
The Stability ◽  
Evaluation Techniques

Abstract It has historically been frequent among geotechnical practitioners, that the stability analysis of the slopes of an open pit is performed using a two dimensional section representing the highest and steepest walls within a certain geological setting. However, the literature shows that to predict rupture events in an open pit, a three-dimensional analysis would better represent the actual conditions, as the spatial distribution of the lithology and the structural features play an important role when defining the stability of the slopes. This paper presents the case study of an open it located in Brazil, which experienced instabilities between the years 2001-2019. An evaluation of the behavior of the open pit was performed by calibrating the strength parameters to represent the best documented rupture events. The three-dimensional model was made using the FLAC3D software. The results show that there is a good correlation between the results of the model and the reports of past instabilities. Finally, recommendations are presented for the inter-ramp angles for each lithology based on the calibrated stability analyzes performed. This work seeks to contribute to the knowledge in evaluation techniques for the three-dimensional behavior of open pits.

scholarly journals Stability of Three-Dimensional Slurry Trenches with Inclined Ground Surface: A Theoretical Study

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Xiao-Fei Jin ◽  
Shu-Ting Liang ◽  
Xiao-Jun Zhu
Keyword(s):  
Safety Factor ◽  
Three Dimensional ◽  
Ground Surface ◽  
Theoretical Method ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Coulomb Type ◽  
The Stability ◽  
Inclined Angle ◽  
2D And 3D

Stability of slurry trenches is an important issue during the construction of the groundwater cutoff walls and diaphragm walls, and thus gradually draws attention. In this paper, a theoretical method for a three-dimensional trench model with an inclined ground was proposed. Based on the Coulomb-type force equilibrium, a safety factor assessing the stability was derived. The results showed that the existing two-dimensional model was conservative compared to the present three-dimensional model; concretely, a greater inclined angle of the inclined ground and trench length decreased the safety factor. This work could be used to assess the trench stability for both 2D and 3D cases with inclined ground surfaces.

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