Results 21 to 30 of about 994 (182)

Structure and dynamics of sawteeth crashes in ASDEX Upgrade [PDF]

Physics of Plasmas, 2010
The crash phase of the sawteeth in ASDEX Upgrade tokamak [Herrmann, Fusion Sci. Technol. 44(3), 569 (2003)] is investigated in detail in this paper by means of soft x-ray (SXR) and electron cyclotron emission (ECE) diagnostics.
Classen, I.G.J., G. Pereverzev, S. Günter, J. Boom, O. Dumbrajs, Igochine, V., Zohm, H. ; https://orcid.org/, Dumbrajs, O., V. Igochine, Classen, I., Pereverzev, G., Boom, J.E., null null, H. Zohm, Lackner, K., I. Classen, K. Lackner, Boom, J., Zohm, H., Gunter, S.   +19 more
core   +3 more sources

Off-Axis Sawteeth and Double-Tearing Reconnection in Reversed Magnetic Shear Plasmas in TFTR

Physical Review Letters, 1996
Off-axis sawteeth are often observed in reversed magnetic shear plasmas when the minimum safety factor q is near or below 2. Fluctuations with m/n = 2/1 (m and n are the poloidal and toroidal mode numbers) appear before and after the crashes.
S A Sabbagh, S H Batha
exaly   +2 more sources

Experimental and Numerical Study of the Failure Behavior of Intermittent Rock Joints Subjected to Direct Shear Load

Advances in Civil Engineering, 2018
Two series of intermittent rock joints containing three joints arranged along the central shear axis were considered in this study. The failure behavior under direct shear loads was investigated by means of both physical tests and numerical simulations ...
Xiang Fan, Kaihui Li, Hongpeng Lai, Qihua Zhao, Zhenhua Sun   +4 more
doaj   +2 more sources

Dynamic Response of Rock Containing Regular Sawteeth Joints under Various Loading Rates and Angles of Application

Applied Sciences, 2020
Intact rock-like specimens and specimens that include a single planar joint or triangular sawteeth joint at various angles are prepared for split Hopkinson pressure bar (SHPB) testing at loading rates of 303.1–5233.6 GPa/s.
Pei-Yun Shu, Chen-Yu Lin, Hung-Hui Li, Ta-Wui Cheng, Tzuu-Hsing Ueng, Tai-Tien Wang   +5 more
doaj   +2 more sources

Non-linear dynamics of compound sawteeth in tokamaks

Physics of Plasmas, 2016
Compound sawteeth is studied with the XTOR-2F code. Non-linear full 3D magnetohydrodynamic simulations show that the plasma hot core is radially displaced and rotates during the partial crash, but is not fully expelled out of the q = 1 surface.
Luciani, J. -F., Nicolas, T., Guirlet, R., Marx, A., Garbet, X., Fevrier, O., Ahn, J. -H., Sabot, R., Lutjens, H., Maget, P., P. Maget, H. Lütjens, O. Février, R. Sabot, X. Garbet, J.-F. Luciani, T. Nicolas, A. Marx, R. Guirlet, J.-H. Ahn   +19 more
core   +3 more sources

Analgesic Effects of Dexmedetomidine Combined with Spinal and Epidural Anesthesia Nursing on Prostate Hyperplasia Patients after Transurethral Resection of Prostate by Intelligent Algorithm-Based Magnetic Resonance Imaging. [PDF]

Comput Math Methods Med, 2022
To analyze the investigation of the application effects of different doses of dexmedetomidine (Dex) with combined spinal and epidural anesthesia nursing on analgesia after transurethral resection of prostate (TURP) by intelligent algorithm‐based magnetic resonance imaging (MRI), MRI imaging segmentation model of mask regions with convolutional neural ...
Zhang X, Bo M, Zeng R, Zou L, He Y.
europepmc   +2 more sources

Development of a reduced model for energetic particle transport by sawteeth in tokamaks [PDF]

, 2022
The sawtooth instability is known for inducing transport and loss of energetic particles (EPs), and for generating seed magnetic islands that can trigger tearing modes. Both effects degrade the overall plasma performance.
Yang, J., Cecconello, M., White, R. B., Gorelenkova, M., Teplukhina, A., Podesta, M., Vallar, M., Gorelenkov, N. N., Bonofiglo, P. J., Poli, F. M.   +9 more
core   +2 more sources

Light‐weight deep learning method for active jamming recognition based on improved MobileViT

IET Radar, Sonar &Navigation, Volume 17, Issue 8, Page 1299-1311, August 2023., 2023
In this study, we propose a lightweight neural network model called MobileViT_CA, an improved version of MobileViT, for jamming recognition in small sample scenarios. The algorithm aims at the problems of large model sizes and low recognition accuracy in small sample sizes.
Wenxu Zou, Kai Xie, Jinjian Lin
wiley   +1 more source

Implementation of AI/DEEP learning disruption predictor into a plasma control system

Contributions to Plasma Physics, Volume 63, Issue 5-6, June-July 2023., 2023
Abstract This paper reports on advances in the state‐of‐the‐art deep learning disruption prediction models based on the Fusion Recurrent Neural Network (FRNN) originally introduced in a 2019 NATURE publication [https://doi.org/10.1038/s41586‐019‐1116‐4].
William Tang, Ge Dong, Jayson Barr, Keith Erickson, Rory Conlin, Dan Boyer, Julian Kates‐Harbeck, Kyle Felker, Cristina Rea, Nikolas Logan, Alexey Svyatkovskiy, Eliot Feibush, Joseph Abbatte, Mitchell Clement, Brian Grierson, Raffi Nazikian, Zhihong Lin, David Eldon, Auna Moser, Mikhail Maslov   +19 more
wiley   +1 more source

Pareto‐Improving Tax Reforms and the Earned Income Tax Credit

Econometrica, Volume 91, Issue 3, Page 1077-1103, May 2023., 2023
We develop a new approach for the identification of Pareto‐improving tax reforms. This approach yields necessary and sufficient conditions for the existence of Pareto‐improving reform directions. A main insight is that “Two brackets are enough”: When the system cannot be improved by altering tax rates in one or two income brackets, then there is no ...
Felix J. Bierbrauer, Pierre C. Boyer, Emanuel Hansen   +2 more
wiley   +1 more source