Results 41 to 50 of about 71,240 (263)
International Journal of Adaptive Control and Signal Processing, EarlyView.This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir +2 more
wiley +1 more source
On the problem of the existence and uniqueness of right triangles
Lietuvos Matematikos Rinkinys, 2017 In the article necessary and sufficient conditions for existence and uniqueness of a right triangle with given bisector and median are established.
Jevgenijus Kirjackis +2 more
doaj +1 more source
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur +5 more
wiley +1 more source
On the insolubility of one drawing problem
Lietuvos Matematikos Rinkinys, 2015 It is shown in the article that, in general, it is not possible to draw a triangle using a compass and a straightedge given an angle, and a bisector and a median drawn from the vertex of another angle. It is shown in which particular cases a triangle can
Jevgenijus Kirjackis +2 more
doaj +1 more source
On Pairs of Additive Cubic Equations [PDF]
Proceedings of the London Mathematical Society, 1977 Peer Reviewed ; http://deepblue.lib.umich.edu/bitstream/2027.42/135506/1/plms0354 ...
openaire +3 more sources
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez +5 more
wiley +1 more source
Recovering Two Lost Treatises on Approximating the Sine of 1 ° from Qushjī’s Commentary on Zīj-i Ṣulṭānī [PDF]
Nazariyat: Journal for the History of Islamic Philosophy and SciencesThe accuracy of medieval approximations of the Sine of 1° reached its peak with the works of the Persian mathematician and astronomer Ghiyāth al-Dīn Jamshīd al-Kāshī (d. 832/1429), and his patron Ulugh Beg (d.
Fateme Savadi
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Journal of Ocean Engineering and Science, 2022 In this work, the Benjamin-Bona-Mahony-Burgers (BBMB) equation is solved using an improvised cubic B-spline collocation technique. This equation describes the propagation of small amplitude waves in a nonlinear dispersive medium, in the modeling of ...
Shallu, V.K. Kukreja
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Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys
Advanced Engineering Materials, EarlyView.This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa +9 more
wiley +1 more source
Rayleigh Waves: Velocity, Attenuation with Depth and Elliptical Polarization [PDF]
Revista Brasileira de Ensino de FísicaIn 1887, Lord Rayleigh published a theory of a surface wave that later became known as the Rayleigh wave. The main features of this wave are its attenuation with depth and the fact that its velocity is always less than the S-wave velocity.
Amin Bassrei
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