National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

SIGMAR-3D: scale-invariant guaranteed monotone accurate registration for 3D scenes

Abstract SIGMAR-3D is a training-free framework for robust pairwise 3D point-cloud registration. It combines a handcrafted local descriptor, SIGMA, with a scene-adaptive coarse-to-fine registration stage, R-3D. SIGMA builds a repeatable local reference frame at each keypoint and...

Adaptive cognitive control of LDPC-coded UAV radio links under electronic countermeasures

Reliable UAV radio links operating under intentional interference require adaptation mechanisms that account not only for channel quality but also for the internal dynamics of iterative decoding. This paper proposes a convergence-aware cross-layer control method for LDPC-coded UA...

A Unified Neural Framework for Punctuation and Capitalization Restoration Using XLM-RoBERTa–BiLSTM

Accurate punctuation and capitalization are essential for the readability, interpretability, and structural coherence of machine-generated text. Their absence is particularly problematic in automatic speech recognition outputs and other forms of unstructured text, where missing p...

Existence and Uniqueness for a Class of Quasilinear Elliptic Systems with Kato-Type Lower-Order Terms

We study a quasilinear elliptic system λ u | u | p − 2 − div ( a ( x , ∇ u ) ) + b ( x , u ) = f ( x ) , in a bounded domain Ω ⊂ R l ( l > 2 , 2 ≤ p < l ), with homogeneous Dirichlet boundary conditions. The principal part a depends only on the gradient and satisfies strong monot...

Novel Conductometric Chemosensor Based on Methylenebis(Phosphonic Acid)-Modified Calixarene for L-Arginine Determination

This study reports the synthesis of a novel methylenebisphosphonic acid calix[4]arene derivative and its application as a receptor layer in a conductometric chemosensor for the highly sensitive detection of L-arginine. The synthesized calixarene contains two methylenebisphosphoni...

Deterministic modelling of end-milled sidewall topography with tool runout, tooth-radius difference and stationary cutter deflection

End milling is widely used to manufacture ribs, pockets, frames, and other structural features in mechanical and aerospace components. The resulting sidewall topography can affect dimensional accuracy, functional performance, and fatigue behaviour, so its prediction is relevant d...

Adaptive Method for Optical Tracking of Maneuvering Aerial Objects Under Limited Computational Resources

This paper addresses the urgent scientific and applied problem of automatic tracking of highly maneuverable Unmanned Aerial Vehicles (UAVs) using systems based on platforms with limited computing power (Edge Computing). The paper analyzes the shortcomings of classical correlation...

Full-portfolio Monte Carlo validation

This archive contains the supplementary Monte Carlo materials accompanying the article. The files reproduce the full-portfolio numerical validation reported in Section 6.The simulation generates paths of the common Cox–Ingersoll–Ross mortality intensity and, conditional on each p...