Haku
Viitteet 1-10 / 79
On local triangle algebras
(2021)
- article
In this paper, we have introduced the notion of local and semilocal triangle algebras and propose the theorems that characterize these algebraic structures. Additionally, we have established the new properties of these ...
Investigating Root Causes of Railway Track Geometry Deterioration – A Data Mining Approach
(2020)
- article
Railway track geometry deterioration indicates degradation in the underlying track structures. Monitoring and predicting this behavior are important as is investigating the root causes contributing to the deterioration. ...
Learning mathematics by project work in secondary school
(2020)
- article
In project-based learning, pupils have two central learning objectives: to understand the content of the subject and to develop their twenty-first-century skills. This article concerns the use of project work in mathematics ...
Asymptotics and approximation of large systems of ordinary differential equations
(2020)
- article
In this paper we continue our earlier investigations into the asymptotic behaviour of infinite systems of coupled differential equations. Under the mild assumption that the so-called characteristic function of our system ...
Curvatures, graph products and Ricci flatness
(2021-03)
- article
In this paper, we compare Ollivier Ricci curvature and Bakry-\'Emery curvature notions on combinatorial graphs and discuss connections to various types of Ricci flatness. We show that non-negativity of Ollivier Ricci ...
A category theoretical interpretation of discretization in Galerkin finite element method
(2020)
- article
The Galerkin finite element method (FEM) is used widely in finding approximative solutions to field problems in engineering and natural sciences. When utilizing FEM, the field problem is said to be discretized. In this ...
Multiplierless filtered-OFDM transmitter for narrow-band IoT devices
(2020-02-13)
- article
In cyclic-prefix orthogonal frequency-division multiplexing (CP-OFDM) based radio access, the coexistence of different technologies without precise time-frequency synchronization is limited due to high out-of-band emissions. ...
Reduced Order Controller Design for Robust Output Regulation
(2020-06)
- article
We study robust output regulation for parabolic partial differential equations and other infinite-dimensional linear systems with analytic semigroups. As our main results we show that robust output tracking and disturbance ...
The Graph Curvature Calculator and the curvatures of cubic graphs
(2022-07)
- article
We classify all cubic graphs with either non-negative Ollivier-Ricci curvature or non-negative Bakry-Émery curvature everywhere. We show in both curvature notions that the non-negatively curved graphs are the prism graphs ...