Results 51 to 60 of about 360,754 (261)
Efficient electromagnetic analysis of multi‐layer and multi‐scale periodic/quasi‐periodic structures
IET Microwaves, Antennas &Propagation, Volume 17, Issue 1, Page 1-12, January 2023., 2023 First, this method realises that the quasi‐periodic structure is extended from one layer to multiple layers. At the same time, the unit cells of the structure are no longer the conventional square lattice, and the size of different types of unit cells cannot be required for the same.
Pengfei Wen, Xingjun Wang
wiley +1 more source
New variants of fuzzy optimal control problems
Asian Journal of Control, EarlyView.Abstract This study introduces a groundbreaking approach to optimal control problems by incorporating fuzzy conformable derivatives. Our primary goal is to identify the optimal control strategy that maximizes fuzzy performance indices while adhering to fuzzy conformable dynamical systems.
Awais Younus +3 more
wiley +1 more source
Surveys in Mathematics and its Applications, 2023 We present a streamlined, slightly modified version, in the two-variable situation, of a beautiful, but not so well known, theory by Bögel, already from the 1930s, on an alternative higher dimensional calculus of real functions, a double calculus, which ...
Patrik Lundström
doaj
A Short Journey Through the Riemann Integral [PDF]
, 2014 An introductory-level theory of integration was studied, focusing primarily on the well-known Riemann integral and ending with the Lebesgue integral. An examination of the Riemann integral\u27s basic properties and necessary conditions shows that this ...
Keyton, Jesse
core +1 more source
, 2015 Using the notion of the truncated variation we obtain a new theorem on the existence and estimation of the Riemann-Stieltjes integral. As a special case of this theorem we obtain an improved version of the Lo\'{e}ve-Young inequality for the Riemann ...
Łochowski, Rafał M.
core +1 more source
Asian Journal of Control, EarlyView.Abstract We study a nonlinear ψ−$$ \psi - $$ Hilfer fractional‐order delay integro‐differential equation ( ψ−$$ \psi - $$ Hilfer FrODIDE) that incorporates N−$$ N- $$ multiple variable time delays. Utilizing the ψ−$$ \psi - $$ Hilfer fractional derivative ( ψ−$$ \psi - $$ Hilfer‐FrD), we investigate the Ulam–Hyers––Rassias (U–H–R), semi‐Ulam–Hyers ...
Cemil Tunç, Osman Tunç
wiley +1 more source
LOCALLY DAN GLOBALLY SMALL RIEMANN SUMS FUNGSI TERINTEGRAL HENSTOCK-DUNFORD PADA [a,b] [PDF]
, 2013 Perluasan integral Dunford ke dalam integral tipe Riemann (Henstock) memberikan definisi integral baru, yaitu integral Henstock-Dunford. Pada makalah ini penulis mengkaji sifat-sifat lebih lanjut dari integral Henstock-Dunford pada [a,b], yaitu beberapa ...
Siti , Khabibah +2 more
core
Stochastic Quantum Mechanics in Curved Spaces: Application to Schwarzschild Black Holes
Astronomische Nachrichten, EarlyView.ABSTRACT In this work, we start from the hypothesis that the universe lives in a Gravitational Wave Background (GWB). From this hypothesis, it follows that space–time is not locally flat because we have to take into account the fluctuations of the GWB in space–time. This implies that sufficiently small particles will feel these oscillations, preventing
Juan S. Jerez‐Rodriguez +1 more
wiley +1 more source
Robust causal inference for point exposures with missing confounders
Canadian Journal of Statistics, EarlyView.Abstract Large observational databases are often subject to missing data. As such, methods for causal inference must simultaneously handle confounding and missingness; surprisingly little work has been done at this intersection. Motivated by this, we propose an efficient and robust estimator of the causal average treatment effect from cohort studies ...
Alexander W. Levis +3 more
wiley +1 more source
Discontinuous Riemann integrable functions emerging from cellular automata [PDF]
arXiv, 2021 This paper presents discontinuous Riemann integrable functions on the unit interval $[0, 1]$ derived from the dynamics of two-dimensional elementary cellular automata. Based on the self-similarities of their orbits, we write down the numbers of nonzero states in the spatial and spatio-temporal patterns and obtain discontinuous Riemann integrable ...
arxiv