Results 111 to 120 of about 54,190 (232)
Exact and Approximate Solutions of A Fractional Diffusion Problem with Fixed Space Memory Length
International Journal of Applied Mathematics and Computer ScienceWe study a fractional differential diffusion equation, where the spatial derivative is expressed by the fractional differential operator with a fixed space memory length.
Klimek Malgorzata, Blaszczyk Tomasz
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Map and Archival Evidence of the Historical Avulsion of the Brahmaputra River
The Geographical Journal, Volume 192, Issue 2, June 2026.Short Abstract One of the world's great rivers, the Brahmaputra, avulsed—changed course—significantly sometime between the dates of 1765 and 1830. These are the dates of surveys by James Rennell (grey) and Richard Wilcox (black), both under the direction of the East India Company; no other surveys between these dates can refine the estimate of the ...
Keith Richards +2 more
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PID‐Like Robust Control of Non‐Minimum Phase Robotic Manipulators
International Journal of Robust and Nonlinear Control, Volume 36, Issue 8, Page 4490-4503, 25 May 2026.ABSTRACT This paper proposes an output‐feedback tracking controller for non‐minimum phase nonlinear systems with unknown uncertainties and external disturbances, where not all states are measurable, and the zero dynamics are unstable. The approach combines a backstepping‐based stabilizing state‐feedback law with a cascade extended high‐gain observer ...
Mohammad Al Saaideh +2 more
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Advanced Energy and Sustainability Research, Volume 7, Issue 5, May 2026.Pan‐European Climate Database v4.2 was released in 2025 and the methodology behind the new detailed photovoltaic capacity factor timeseries is here described. It highlights typology‐based profiles, with distinctive performance patterns across rooftop and utility‐scale systems, their validation with real TSO data, and their growing role in grid planning,
R. Amaro e Silva +16 more
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A rational cubic trigonometric approximation scheme of the generalized Cornu spirals. [PDF]
Springerplus, 2016 Mahmood H, Hussain M, Hussain MZ.
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Moderate Deviation Principles for Lacunary Trigonometric Sums
Mathematische Nachrichten, Volume 299, Issue 5, Page 1028-1044, May 2026.ABSTRACT Classical works of Kac, Salem, and Zygmund, and Erdős and Gál have shown that lacunary trigonometric sums despite their dependency structure behave in various ways like sums of independent and identically distributed random variables. For instance, they satisfy a central limit theorem (CLT) and a law of the iterated logarithm.
Joscha Prochno, Marta Strzelecka
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Trigonometric derived rate of convergence of various smooth singular integral operators
Modern Mathematical MethodsIn this article, we continue the study of approximation of various smooth singular integral operators. This time the foundation of our research is a trigonometric Taylor’s formula.
George Anastassiou
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Electrothermal Twisted and Coiled Polymer Artificial Muscles and Their Applications in Soft Robotics
Small Structures, Volume 7, Issue 5, May 2026.Researchers develop a PE@SPN electrothermal polymer artificial muscle with a parallel‐stranded spiral structure. A temperature self‐sensing‐driven hierarchical closed‐loop fractional order PID (FOPID) control scheme is adopted. A rehabilitation manipulator was designed, and subsequently, a series of experiments are conducted to test the performance of ...
Yali Han +6 more
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Wind Energy, Volume 29, Issue 5, May 2026.ABSTRACT Yaw engineering models are commonly used as add‐ons to the industrial blade element momentum (BEM) framework to improve load and power predictions by accounting for the skewed wake effect. However, existing yaw engineering models show noticeable limitations in accurately predicting the induced velocity distribution across the blade span.
Haoyuan Sun, Andrea Sciacchitano, Wei Yu
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Equivalence between various Shape Preserving Approximations of periodic functions
Researches in MathematicsWe show that the validity of Jackson-type estimates in comonotone and coconvex approximations of continuous $2\pi$-periodic functions by trigonometric polynomials is equivalent to the validity of the corresponding estimates of approximation by continuous
D. Leviatan, O.V. Motorna, I.O. Shevchuk
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