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We address the problem of predicting the occurrence of infrequent adverse events in the context of predictive maintenance. We cast the corresponding machine learning task as an imbalanced classification problem and propose a framework for…

机器学习 · 计算机科学 2021-01-28 Stefano Coniglio , Anthony J. Dunn , Alain B. Zemkoho

Quantitative descriptions of the structure-thermal property correlation have been a bottleneck in designing materials with superb thermal properties. In the past decade, the first-principles phonon calculations using density functional…

材料科学 · 物理学 2021-10-19 Xin Qian , Ronggui Yang

The present study assesses RANS-based turbulence models to simulate isothermal flow in a combustor representing a constituent can combustor of can-annular configuration used in jet engines. Two-equation models (standard $k-\epsilon$,…

流体动力学 · 物理学 2024-06-25 Aishvarya Kumar , Ram Prakash Bharti

Power and thermal management are critical components of High-Performance-Computing (HPC) systems, due to their high power density and large total power consumption. The assessment of thermal dissipation by means of compact models directly…

机器学习 · 计算机科学 2018-11-08 Federico Pittino , Roberto Diversi , Luca Benini , Andrea Bartolini

The 100 MW cryogenic liquid oxygen/hydrogen multi-injector combustor BKD operated by the DLR Institute of Space Propulsion is a research platform that allows the study of thermoacoustic instabilities under realistic conditions,…

Accurate thermal analysis of composites and porous media requires detailed characterization of local thermal properties in small scale. For some important applications such as lithium-ion batteries, changes in the properties during the…

应用物理 · 物理学 2020-10-06 Fazlolah Mohaghegh , Jayathi Murthy

Supersonic combustion plays a vital role in various applications, including scramjets, dual-mode ramjets, and pulse detonation engines. However, the flame characteristics can vary significantly, depending on the application. To model…

流体动力学 · 物理学 2023-06-21 Xu Zhu , Jian An , Nana Wang , Jian Zhang , Zhuyin Ren

The need for improved engine efficiencies has motivated the development of high-pressure combustion systems, in which operating conditions achieve and exceed critical conditions. Associated with these conditions are large thermodynamic…

流体动力学 · 物理学 2017-05-23 Peter C. Ma , Matthias Ihme , Luis Bravo

Gas turbine engines are complex machines that typically generate a vast amount of data, and require careful monitoring to allow for cost-effective preventative maintenance. In aerospace applications, returning all measured data to ground is…

机器学习 · 计算机科学 2024-08-20 Adam Hartwell , Felipe Montana , Will Jacobs , Visakan Kadirkamanathan , Andrew R Mills , Tom Clark

Turbulence plays a key role in star formation in molecular clouds, affecting star cluster primordial properties. As modelling present-day objects hinges on our understanding of their initial conditions, better constraints on turbulence can…

星系天体物理 · 物理学 2020-10-14 Piero Trevisan , Mario Pasquato , Alessandro Ballone , Michela Mapelli

Building performance has been shown to degrade significantly after commissioning, resulting in increased energy consumption and associated greenhouse gas emissions. Continuous Commissioning using existing sensor networks and IoT devices has…

信号处理 · 电气工程与系统科学 2022-08-31 Rony Shohet , Mohamed Kandil , Y. Wang , J. J. McArthur

This paper addresses the topic of condition monitoring of wind turbine blades and presents a learning-based approach to fault detection. The proposed scheme utilises Principal Components Analysis and Autoencoders to derive data-driven…

系统与控制 · 电气工程与系统科学 2024-11-01 Giovanni Zaniboni , Alessio Dallabona , Johnny Nielsen , Dimitrios Papageorgiou

Cirrus clouds are key modulators of Earth's climate. Their dependencies on meteorological and aerosol conditions are among the largest uncertainties in global climate models. This work uses three years of satellite and reanalysis data to…

大气与海洋物理 · 物理学 2023-05-29 Kai Jeggle , David Neubauer , Gustau Camps-Valls , Ulrike Lohmann

Process optimization in chemical engineering may be hindered by the limited availability of reliable thermodynamic data for fluid mixtures. Remarkable progress is being made in predicting thermodynamic mixture properties by machine learning…

计算工程、金融与科学 · 计算机科学 2025-10-14 Martin Bubel , Tobias Seidel , Michael Bortz

Chemical multisensor devices need calibration algorithms to estimate gas concentrations. Their possible adoption as indicative air quality measurements devices poses new challenges due to the need to operate in continuous monitoring modes…

人工智能 · 计算机科学 2020-02-14 S. De Vito , E. Esposito , M. Salvato , O. Popoola , F. Formisano , R. Jones , G. Di Francia

Around a glass transition, the dynamics of a supercooled liquid dramatically slow down, exhibited by caging of particles, while the structural changes remain subtle. In alternative to recent machine learning studies searching for structural…

无序系统与神经网络 · 物理学 2022-09-07 Kaihua Zhang , Xinyang Li , Yuliang Jin , Ying Jiang

Tabular data stands out as one of the most frequently encountered types in high energy physics. Unlike commonly homogeneous data such as pixelated images, simulating high-dimensional tabular data and accurately capturing their correlations…

仪器与探测器 · 物理学 2024-04-30 Cheng Jiang , Sitian Qian , Huilin Qu

The digitization of manufacturing processes enables promising applications for machine learning-assisted quality assurance. A widely used manufacturing process that can strongly benefit from data-driven solutions is gas metal arc welding…

Sustainable aviation fuels have the potential for reducing emissions and environmental impact. To help identify viable sustainable aviation fuels and accelerate research, several machine learning models have been developed to predict…

化学物理 · 物理学 2024-08-06 Ana E. Comesana , Sharon S. Chen , Kyle E. Niemeyer , Vi H. Rapp

This paper is devoted to a practical method for ferroalloys consumption modeling and optimization. We consider the problem of selecting the optimal process control parameters based on the analysis of historical data from sensors. We…

机器学习 · 计算机科学 2022-04-18 Nick Knyazev