TU-C-303A-06: Quiet Respiration Breathing Motion Model Parameters for Free-Breathing Patients

2009 ◽  
Vol 36 (6Part22) ◽  
pp. 2725-2725
Author(s):  
T Zhao ◽  
W Lu ◽  
J Bradley ◽  
P Parikh ◽  
J Hubenschmidt ◽  
...  
Keyword(s):  
Free Breathing ◽  
Model Parameters ◽  
Motion Model ◽  
Breathing Motion

Free Breathing Motion Model: First Report of Patient Model Parameters

2009 ◽  
Vol 75 (3) ◽  
pp. S23
Author(s):  
D. Low ◽  
T. Zhao ◽  
D. Yang ◽  
W. Lu ◽  
S. Mutic ◽  
...  
Keyword(s):  
Free Breathing ◽  
Model Parameters ◽  
Motion Model ◽  
First Report ◽  
Breathing Motion ◽  
Patient Model

CONSEQUENCES OF A QUANTITATIVE FREE BREATHING MOTION MODEL

2009 ◽  
Vol 92 ◽  
pp. S166
Author(s):  
D. Low ◽  
T. Zhao ◽  
P. Parikh ◽  
W. Lu ◽  
S. Mutic ◽  
...  
Keyword(s):  
Free Breathing ◽  
Motion Model ◽  
Breathing Motion

scholarly journals Simulation of non-stationary stochastic ground motions based on recent Italian earthquakes

2021 ◽  
Author(s):  
Fabio Sabetta ◽  
Antonio Pugliese ◽  
Gabriele Fiorentino ◽  
Giovanni Lanzano ◽  
Lucia Luzi
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Strong Motion ◽  
Stochastic Simulations ◽  
Model Parameters ◽  
Motion Model ◽  
Arias Intensity ◽  
Time Frequency ◽  
Ground Motion Model ◽  
Ground Motion Records

AbstractThis work presents an up-to-date model for the simulation of non-stationary ground motions, including several novelties compared to the original study of Sabetta and Pugliese (Bull Seism Soc Am 86:337–352, 1996). The selection of the input motion in the framework of earthquake engineering has become progressively more important with the growing use of nonlinear dynamic analyses. Regardless of the increasing availability of large strong motion databases, ground motion records are not always available for a given earthquake scenario and site condition, requiring the adoption of simulated time series. Among the different techniques for the generation of ground motion records, we focused on the methods based on stochastic simulations, considering the time- frequency decomposition of the seismic ground motion. We updated the non-stationary stochastic model initially developed in Sabetta and Pugliese (Bull Seism Soc Am 86:337–352, 1996) and later modified by Pousse et al. (Bull Seism Soc Am 96:2103–2117, 2006) and Laurendeau et al. (Nonstationary stochastic simulation of strong ground-motion time histories: application to the Japanese database. 15 WCEE Lisbon, 2012). The model is based on the S-transform that implicitly considers both the amplitude and frequency modulation. The four model parameters required for the simulation are: Arias intensity, significant duration, central frequency, and frequency bandwidth. They were obtained from an empirical ground motion model calibrated using the accelerometric records included in the updated Italian strong-motion database ITACA. The simulated accelerograms show a good match with the ground motion model prediction of several amplitude and frequency measures, such as Arias intensity, peak acceleration, peak velocity, Fourier spectra, and response spectra.

Motion Model of Two-Wheel Differential Drive Mobile Robot under Variable Load

2014 ◽  
Vol 668-669 ◽  
pp. 352-356 ◽  
Author(s):  
Zhi Hu Ruan ◽  
Niu Wang ◽  
Bing Xin Ran
Keyword(s):  
Mobile Robot ◽  
State Space Model ◽  
Response Characteristic ◽  
Model Parameters ◽  
Variable Load ◽  
Motion Model ◽  
Actual System ◽  
Wheel Load ◽  
Differential Drive ◽  
Entire Vehicle

Based on kinematics characteristic of two-wheeled differential drive mobile robot (WMR) and response characteristic of fact motor drive system, this paper presents the analysis method of the equivalent rotation inertia, and the entire vehicle load is assigned to each wheel, and then the wheel load is converted into the corresponding equivalent rotation inertia of the motor shaft of each wheel, and motion model of WMR are obtained for combining with quasi-equivalent (QE) state space model of double-loop direct current motor systems under variable load and kinematics model of WMR under the load changes. By using speed response data of the actual system and combining with genetic algorithm to accurately identify the model parameters. Finally, through experiments results of the WMR motion model and the second order model respectively comparing with the actual system which demonstrates the effectiveness of the proposing method and model.

Addition of Cardiac Motion in a Breathing Motion Model

2012 ◽  
Vol 84 (3) ◽  
pp. S746
Author(s):  
B. White ◽  
A. Santhanam ◽  
Z. Wang ◽  
S. Jani ◽  
J. Lamb ◽  
...  
Keyword(s):  
Cardiac Motion ◽  
Motion Model ◽  
Breathing Motion

A search for constraints on lithospheric net rotation in 2D convection simulations

2021 ◽  
Author(s):  
Suzanne Atkins ◽  
Nicolas Coltice
Keyword(s):  
Reference Frames ◽  
Plate Motion ◽  
Model Parameters ◽  
Motion Model ◽  
Motion Models ◽  
The Third ◽  
The Earth ◽  
Geological Past ◽  
Wide Range ◽  
Third Dimension

<p>Net rotation is the process whereby the entire lithosphere can rotate with respect to the Earth’s mantle. The plates and continents retain their location with respect to each other, but they change their position with respect to global reference frames such as the Earth’s magnetic dipole, and structures in the Earth’s mantle such as plumes and hotspots. Constraining lithospheric net rotation is therefore one factor in building an absolute plate motion model. However, the amount of net rotation occurring at present day is poorly contained, and the drivers of net rotation are very poorly understood. Many absolute plate motion models therefore attempt to minimise net rotation, because there is no way to constrain rotation in the geological past. </p><p> </p><p>In previous geodynamical studies, the presence of thick continents and large viscosity contrasts were found to be controlling factors in the development of net rotation. We investigate the effects of different convection parameters and tectonic states on the magnitude and evolution of net rotation in 2D simulations. The use of 2D simulations allows us to run enough simulations to study a wide range of model parameters. We intend to compare our 2D conclusions with 3D simulations, to investigate how much of a difference the third dimension makes.</p><p> </p><p>We find that net rotation varies on much shorter timescales than any other geodynamic feature. Net rotation is not cleanly correlated with any tectonic behaviours or settings, and that the magnitude and duration is unpredictable. We do however find that the distribution of net rotation within the lifetime of a particular simulation is Gaussian, with standard deviation dependent on the viscosity structure and contrasts of the simulation, in agreement with previous studies. However, in contrast to previous studies, the presence and thickness of continents makes very little difference to the speed of lithospheric rotation, although this may be because we are working in 2D. If the 2D results are also relevant in 3D, net rotation is a continuously varying and unpredictable value, but with a predictable statistical range. This may provide a way to better constrain net rotation for plate motion models.</p>

SU-E-J-234: Application of a Breathing Motion Model to ViewRay Cine MR Images

2015 ◽  
Vol 42 (6Part11) ◽  
pp. 3319-3319
Author(s):  
D. P. O'Connell ◽  
D. H. Thomas ◽  
T. H. Dou ◽  
J. M. Lamb ◽  
L. Yang ◽  
...  
Keyword(s):  
Motion Model ◽  
Mr Images ◽  
Breathing Motion ◽  
Cine Mr

EP-1450 IMPLICATIONS OF FREE BREATHING MOTION ASSESSED BY 4D-CT ON THE DELIVERED DOSE IN ESOPHAGEAL CANCER

2012 ◽  
Vol 103 ◽  
pp. S552-S553
Author(s):  
M.N. Duma ◽  
M. Oechsner ◽  
M. Geier ◽  
H. Hammami ◽  
H. Geinitz
Keyword(s):  
Esophageal Cancer ◽  
Free Breathing ◽  
4D Ct ◽  
Breathing Motion ◽  
Delivered Dose
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