Autor: Al-Tameemi, A. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Rearrangeability of 2×2 W-S-W Elastic Switching Fabrics with Two Connection Rate
Autorzy:: Kabaciński, W.
Rajewski, R.
Al-Tameemi, A.
Tematy:: elastic optical networks
elastic optical switching nodes
interconnection networks
rearrangeable non-blocking conditions; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/307745.pdf Link otwiera się w nowym oknie
Opis:: The rearreangeable conditions for the 2×2 three-stage switching fabric of a W-S-W architecture for elastic optical switches are considered in this paper. Analogies between the switching fabric considered and the three-stage Clos network are shown. On the other hand, differences are also shown, which presented the modifications required in the control algorithm used in rearrangeable networks. The rearrangeable conditions and the control algorithm are presented and proved. Operation of the proposed control algorithm is shown based on a few examples. The required number of frequency slot units in interstage links of rearrangeable switching fabrics is much lower than in the strict-sense non-blocking switching fabrics characterized by the same parameters.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The effect of NI-TIO₂ and NI-TIO₂-graphene coatings and heat treatment hardening on solid particles erosion resistance of grade 410 stainless steel
Autorzy:: Khalid, Wissam
Al-Tameemi, Hamza A.
Tematy:: solid particles erosion
wear rate
wear resistance
erosion testers
AISI 410 stainless steel
Ni-TiO2 coating
Ni-TiO2-graphene coating; Pokaż więcej
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Powiązania:: https://bibliotekanauki.pl/articles/38912091.pdf Link otwiera się w nowym oknie
Opis:: Erosion by solid particles is a serious problem in many applications, especially in rotary machines with steel blades. Many coatings are currently being developed to improve erosion resistance. This study focuses on investigating the solid particles erosion (SPE) resistance of AISI 410 stainless steel and improving the SPE resistance using three different anti-wear techniques: hard coating (Ni-TiO₂), hard coating with low shear resistance (Ni-TiO₂-graphene) and hardening by heat treatment. The study also investigates the effect of different factors, including impact angle, jet pressure (particle speed) and solid particle type on each of the four types of specimens. The investigated anti-wear techniques improved the erosion wear rate by different percentages, such as 35.2% using Ni-TiO₂ coating, 36% using Ni-TiO₂-graphene, and 53.75% using heat-treatment when silica sand, a 45◦ impact angle and a speed of 36.72 m/s were used. The results indicate a ductile erosion mechanism as the weight loss decreases with an increase in the impact angle. The investigated coatings were found to provide more stable erosion resistance under different impact angles. Surface roughness was reduced after SPE for coated surfaces, and surfaces showing a lower wear rate may not necessarily show less change in surface roughness. It was observed that deformation in the form of waviness only occurs when the surface is impacted by small rounded particles at a 45◦ angle. Wear rate parameters were calculated, which can be used to estimate the wear rate for the investigated material under various conditions.
Dostawca treści:: Biblioteka Nauki

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