Multi-impurity divertor simulation using a Monte Carlo kinetic impurity transport model

2018 ◽  
Vol 58 (6-8) ◽  
pp. 638-642 ◽  
Author(s):  
K. Hoshino ◽  
Y. Homma ◽  
S. Tokunaga ◽  
K. Shimizu
Keyword(s):  
Monte Carlo ◽  
Transport Model ◽  
Impurity Transport

scholarly journals Multiple Kinetic Parameterization in a Reactive Transport Model Using the Exchange Monte Carlo Method

Minerals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 579 ◽  
Author(s):  
Ryosuke Oyanagi ◽  
Atsushi Okamoto ◽  
Noriyoshi Tsuchiya
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Reactive Transport ◽  
Transport Model ◽  
Synthetic Data ◽  
Solution Chemistry ◽  
Rock Interaction ◽  
Reactive Transport Model ◽  
Reaction Rate Constants ◽  
Wide Range

Water–rock interaction in surface and subsurface environments occurs in complex multicomponent systems and involves several reactions, including element transfer. Such kinetic information is obtained by fitting a forward model into the temporal evolution of solution chemistry or the spatial pattern recorded in the rock samples, although geochemical and petrological data are essentially sparse and noisy. Therefore, the optimization of kinetic parameters sometimes fails to converge toward the global minimum due to being trapped in a local minimum. In this study, we simultaneously present a novel framework to estimate multiple reaction-rate constants and the diffusivity of aqueous species from the mineral distribution pattern in a rock by using the reactive transport model coupled with the exchange Monte Carlo method. Our approach can estimate both the maximum likelihood and error of each parameter. We applied the method to the synthetic data, which were produced using a model for silica metasomatism and hydration in the olivine–quartz–H2O system. We tested the robustness and accuracy of our method over a wide range of noise intensities. This methodology can be widely applied to kinetic analyses of various kinds of water–rock interactions.

Multi-dimensional impurity transport code by Monte Carlo method including gyro-orbit effects

2003 ◽  
Vol 313-316 ◽  
pp. 1183-1187 ◽  
Author(s):  
I. Hyodo ◽  
M. Hirano ◽  
K. Miyamoto ◽  
K. Hoshino ◽  
A. Hatayama
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Impurity Transport ◽  
Transport Code

scholarly journals Synthetic Photoplethysmography (PPG) of the radial artery through parallelized Monte Carlo and its correlation to Body Mass Index (BMI)

2020 ◽  
Author(s):  
Tananant Boonya-ananta ◽  
Andres J. Rodriguez ◽  
Ajmal Ajmal ◽  
Vinh Nguyen Du Le ◽  
Anders K. Hansen ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Body Mass Index ◽  
Monte Carlo ◽  
Body Mass ◽  
Radial Artery ◽  
Transport Model ◽  
The United States ◽  
Light Transport ◽  
Signal Ratio ◽  
Experimental Stage

ABSTRACTCardiovascular disease is one of the leading causes of death in the United States and obesity significantly increases the risk of cardiovascular disease. The measurement of blood pressure (BP) is critical in monitoring and managing cardiovascular disease hence new wearable devices are being developed to make the BP metric mode accessible to physicians and patients. Several wearables utilize photoplethysmography from the wrist vasculature to derive BP assessment although many of these devices are still at the experimental stage. With the ultimate goal of supporting instrument development, we have developed a model the photoplethysmographic waveform derived from the radial artery at the volar surface of the wrist. To do so we have utilized the relation between vessel biomechanics through Finite Element Method and Monte Carlo light transport model. The model shows similar features to that seen in PPG waveform captured using an off the shelf device. We observe the influence of body mass index (BMI) on the PPG signal. A degradation the PPG signal of up to 40% in AC to DC signal ratio was thus observed.

High-Z Impurity Transport Code by Monte Carlo Method in a Realistic Tokamak Geometry – IMPGYRO –

2008 ◽  
Vol 48 (1-3) ◽  
pp. 280-284 ◽  
Author(s):  
K. Hoshino ◽  
M. Noritake ◽  
M. Toma ◽  
A. Hatayama
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Impurity Transport ◽  
Transport Code

Comparison of impurity transport model with measurements of He-like spectra of argon at the tokamak TEXTOR

2006 ◽  
Vol 48 (11) ◽  
pp. 1633-1646 ◽  
Author(s):  
O Marchuk ◽  
M Z Tokar ◽  
G Bertschinger ◽  
A Urnov ◽  
H-J Kunze ◽  
...  
Keyword(s):  
Transport Model ◽  
Impurity Transport
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