Technical University of Sofia

Symmetry-Aware Simulation and Modeling of Noise-Robust Electric Load Forecasting Using Hybrid MMPF-NARX and GA/PSO

Reliable electric load forecasting is an important engineering problem for power-system planning, grid stability, and mission-critical energy management. This paper presents a symmetry-aware simulation and modeling framework for medium-range electric load forecasting under noisy...

Performance Analysis of Q-Learning; DQN-Enhanced PID Controllers for Aircraft Trajectory Tracking Under Wind Disturbances

Traditional fixed-gain proportional–integral–derivative (PID) controllers often exhibit limited adaptability when regulating the longitudinal motion of passenger aircraft under varying flight conditions and external disturbances. This study proposes an adaptive control framework...

Non-Compensatory Security and Utility Gates for Blockchain Lifecycle Assessment: Framework Development and an Operational-Energy Application to the Ethereum Merge

Environmental comparisons of blockchain systems are often reduced to electricity per transaction, although operational services also depend on validators, cloud gateways, storage, monitoring, key management, recovery, and hardware replacement. This study develops a lifecycle asse...

Reimagining digital literacy and virtual identity in the Age of AI” - Special Collection Editorial

This special collection reflects on the need to reimagine teaching and learning spaces in the age of artificial intelligence (AI). Understanding digital literacy and virtual identity is essential to engaging with our contemporary society, which is defined by the fast pace of soci...

Taylor Recurrences and Coulomb-Corrected Asymptotics for the Schrödinger–Newton Ground State

We study the positive, radial ground-state profile of the stationary Schrödinger–Newton system in the fixed-energy normalization μ=1 with V(∞)=0. Using regularity and radial symmetry of solutions, we derive convergent even Taylor expansions for the wave function and Newtonian pot...