GS-DeepNet:掌握托卡马克等离子平衡与深度神经网络以及格拉德-沙夫拉诺夫方程
Semin Joung1,2, Y-C Ghim3, Jaewook Kim4
1Department of Nuclear and Quantum Engineering, KAIST, Daejeon, 34141, South Korea. semin.joung@wisc.edu.
Scientific reports
|September 22, 2023
概括
无监督学习方法GS-DeepNet准确地识别了聚变能源的等离子体平衡. 这种方法避免了传统的数值挑战,可以更好地控制像ITER这样的反应堆中的高温等离子体.
科学领域:
- 血物理学的等离子体物理学
- 核聚变能源的研究.
- 计算科学是一种计算科学.
背景情况:
- 在磁性封闭的核聚变反应堆中实现持续燃烧的等离子体状态需要保持等离子体平衡.
- 等离子平衡,即洛伦兹和压力梯度力量之间的力量平衡,对于聚变能量至关重要.
- 目前用于识别等离子体平衡的方法是计算密集的,涉及主观的人类决定.
研究的目的:
- 开发一种新的,无监督的学习方法,用于实时识别血平衡.
- 在等离子体平衡重建中克服传统代数值方法的局限性.
- 为了使化等级等离子体的更可靠,更精确的控制.
主要方法:
- 介绍GS-DeepNet,一种双神经网络架构,用于无监督学习等离子体平衡.
- 一个神经网络产生了遵守麦克斯韦方程的平衡候选人.
- 第二个神经网络强制执行力平衡条件,由磁性测量指导.
- 该系统在没有传统的数值算法或人类主观输入的情况下学习.
主要成果:
- 只有通过无监督学习,GS-DeepNet才能成功地学习和识别血平衡.
- 该方法提供可靠的平衡与可量化的不确定性,与传统技术不同.
- 在没有代数值解析器或数据的主观排除的情况下,表现出学习能力.
结论:
- GS-DeepNet为核聚变能源实时等离子体平衡识别提供了显著的进步.
- 无监督学习方法提高了准确性,并减少了对人类干预的依赖.
- 这种方法有望改善对包括ITER在内的核聚变反应堆的控制和优化.
相关概念视频
Navier–Stokes Equations
539
For incompressible Newtonian fluids, where density remains constant, stresses show a linear relationship with the deformation rate, defined by normal and shear stresses. Normal stresses depend on the pressure exerted on the fluid and the rate of deformation in specific directions, which determines how fluid flows under varying pressures. Shear stresses, on the other hand, act tangentially across fluid layers. They explain how adjacent fluid layers slide relative to one another, connecting...
539
Fermi Level Dynamics
271
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
271
Nuclear Fusion
21.2K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
21.2K
Maxwell-Boltzmann Distribution: Problem Solving
1.5K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
1.5K
Equations of Equilibrium in Three Dimensions
1.2K
When analyzing structures or systems at rest, it is necessary to ensure they are in equilibrium. This is where the vector and scalar equations of equilibrium come into play. These equations are crucial in ensuring a structure is stable and will not collapse or fall apart. The vector and scalar equations of equilibrium provide a framework for analyzing the forces acting on a body.
According to the vector equations of equilibrium, the vector sum of all the external forces acting on a body must...
According to the vector equations of equilibrium, the vector sum of all the external forces acting on a body must...
1.2K
Turbulent Flow: Problem Solving
155
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
155


