Sándor Németh

Reactor runaway aware RL Agents for safe reactor operation

Balázs Fricz, Kinga Szatmári, Sándor Németh, Lajos Nagy et autres

The control of semi-batch reactors is a challenging task due to the fact that these systems are non-stationary and often non-linear. Thermal runaway may also occur without strict operator supervision and rigorous control systems, which can lead to critical safety incidents. Reinforcement …

hu, cn (code pays fourni par la source)

Spatio-temporal graph neural networks for the forecast of natural water systems

Kinga Szatmári, Sándor Németh, János Abonyi, Alex Kummer

ABSTRACT Accurately forecasting natural water systems is a complex task due to their interconnected structure, where both spatial and temporal dependencies play a critical role. In this work, we applied spatio-temporal graph neural networks of varying complexity to forecast the flow of …

hu (code pays fourni par la source)

Neighborhood preservation-based trajectory clustering for analyzing temporal behavior of dynamic systems

Bálint Levente Tarcsay, János Abonyi, Sándor Németh

This work presents clustering algorithms for identifying movement patterns in trajectories, with a focus on applications in chemical engineering. The exponential growth of dynamic system data necessitates algorithms that account for both local and global trajectory trends. Existing methods often overlook these …

hu (code pays fourni par la source)

On projection mappings and the gradient projection method on hyperbolic space forms

Ronny Bergmann, O. P. Ferreira, Sándor Németh, Jinzhen Zhu

This paper presents several new properties of the intrinsic $κ$-projection into $κ$-hyperbolically convex sets of $κ$-hyperbolic space forms, along with closed-form formulas for the intrinsic $κ$-projection into specific $κ$-hyperbolically convex sets. It also discusses the relationship between the intrinsic $κ$-projection, the Euclidean …

How to support decision making with reinforcement learning in hierarchical chemical process control?

Kinga Szatmári, Tibor Chován, Sándor Németh, Alex Kummer

• Reinforcement learning (RL) in hierarchical levels of chemical process control. • Grouping RL methods at the hierarchical chemical control levels. • Comparison of traditional and RL controls in chemical process control. • Multi-agent reinforcement learning structures in chemical process control. • …

hu (code pays fourni par la source)

Resilience-based explainable reinforcement learning in chemical process safety

Kinga Szatmári, Gergely Horváth, Sándor Németh, Wenshuai Bai et autres

Prediction of Physico-Chemical Parameters of Surface Waters Using Autoregressive Moving Average Models: A Case Study of Kis-Balaton Water Protection System, Hungary

Zsófia Kovács, Bálint Levente Tarcsay, Piroska Tóth, Csenge Judit Juhász et autres

In this work, the authors provide a case study of time series regression techniques for water quality forecasting. With the constant striving to achieve the Sustainable Development Goals (SDG), the need for sensitive and reliable water management tools has become critical. Continuous …

hu (code pays fourni par la source)

Risk-Based Fault Detection Using Bayesian Networks Based on Failure Mode and Effect Analysis

Bálint Levente Tarcsay, Ágnes Bárkányi, Sándor Németh, Tibor Chován et autres

In this article, the authors focus on the introduction of a hybrid method for risk-based fault detection (FD) using dynamic principal component analysis (DPCA) and failure method and effect analysis (FMEA) based Bayesian networks (BNs). The FD problem has garnered great interest …

hu (code pays fourni par la source)

Vas vármegye közigazgatási rendszerének legújabb kori alakulása (1867-2024)

Sándor Németh

Jelen tanulmány célja Vas (vár)megye közigazgatásának a bemutatása a modern polgári állam kialakulásától napjainkig. A feladat összetett, hiszen határmenti, évszázadok óta többnemzetiségű vármegyeként a trianoni békeszerződés erősen megcsonkította, majd az 1950-es megyerendezés is erősen átalakította.A szocializmus ideje alatt a határmentiség újra hátrány …

Policy Explanation of Reinforcement Learning Agent in Chemical Process Safety

Kinga Szatmári, Sándor Németh, Alex Kummer

hu (code pays fourni par la source)

Integration of resilience engineering and reinforcement learning in chemical process safety

Kinga Szatmári, Sándor Németh, Alex Kummer

Exothermic reactions carried out in batch reactors need a lot of attention to operate because any insufficient condition can lead to thermal runaway causing an explosion in the worst case. Therefore, a well-designed intervention action is necessary to avoid non-desired events. For …

hu (code pays fourni par la source)

Assessment of the correlation between the nutrient load from migratory bird excrement and water quality by principal component analysis in a freshwater habitat

Piroska Tóth, Bálint Levente Tarcsay, Zsófia Kovács, Dan Traian Ionescu et autres

Abstract Waterbirds depend on a dispersed network of wetlands for their annual life cycle during migration. Climate and land use changes raise new concerns about the sustainability of these habitat networks, as water scarcity triggers ecological and socioeconomic impacts threatening wetland availability …

hu, ro (code pays fourni par la source)