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Wyszukujesz frazę "Al-rawi, A. A." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Genetic algorithm-PID controller for model order reduction pantographcatenary system
Autorzy:
Al-Awad, Nasir A.
Abboud, Izz K.
Al-Rawi, Muaayed F.
Powiązania:
https://bibliotekanauki.pl/articles/1837796.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
pantograph system
model reduction
PSO
G.A-PID
IMC
LQR
system pantografowy
redukcja modelu
Opis:
Controlling the contact force between the pantograph and the catenary has come to be a requirement for improving the performances and affectivity of high-speed train systems Indeed, these performances can also significantly be decreased due to the fact of the catenary equal stiffness variation. In addition, the contact force can also additionally differ and ought to end up null, which may additionally purpose the loss of contact. Then, in this paper, we current an active manipulate of the minimize order model of pantograph-catenary system. The proposed manipulate approach implements an optimization technique, like particle swarm (PSO), the usage of a frequent approximation of the catenary equal stiffness. All the synthesis steps of the manipulate law are given and a formal evaluation of the closed loop stability indicates an asymptotic monitoring of a nominal steady contact force. Then, the usage of Genetic Algorithm with Proportional-Integral-derivative (G.A-PID) as proposed controller appeared optimum response where, the contacts force consequences to be virtually equal to its steady reference. Finally it seems the advantageous of suggestion approach in contrast with classical manipulate strategies like, Internal mode control(IMC) method, linear quadratic regulator (LQR). The outcomes via the use of MATLAB simulation, suggests (G.A-PID) offers better transient specifications in contrast with classical manipulate.
Źródło:
Applied Computer Science; 2021, 17, 2; 28-39
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth performance and carcass traits of Karadi growing lambs
Autorzy:
Karym, Chnoor M.
Al-rawi, A. A.
Karimc, Goran Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/1070894.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Carcass yield
Karadi sheep
Lambs meat
Opis:
Carcass yield of fat-tailed Karadi lambs was investigated. A total of 32 The Karadi lambs screened from various commercial sheep flocks from four different geographic zones (Sharazoor, Halabja, Sharbazher, and Penjween) in Sulaimani governorate, Kurdistan, Iraq. Eight lambs from each of the 4 ecological zones were randomly assigned to 2 feeding treatments (concentrate diet vs. whole barley grain) at a level of 2% of their body weights with 4-6 hours a day stubble grazing. Results revealed that overall means weights recorded at slaughter (38.263 ±1.4 kg), hot carcass (17.199 ±0.8 kg), dressing percentage (44.901 ±1.1%), neck (0.436 ±0.02 kg), shoulder (1.633 ±0.1 kg), loin (0.529 ±0.03 kg), rack (0.782 ±0.1 kg), breast (0.577 ±0.03 kg), fore shank (0.448 ±0.03 kg) and flank (0.276 ±0.02 kg). Overall means of fat thickness, rib eye area and kidney and pelvic fat were 1.790 ±0.3 mm, 13.967 ±0.6 cm2. Types of feed (barley or concentrate) had no statistical effects on carcass characteristics. Lambs fed barley recorded marginally higher weight at slaughtering, neck, head, feet, leg, shoulder, breast and fore shank as well as rib eye area. On the other hand, lambs fed concentrate had unmarked higher weights of hot carcass, heart, liver, kidney, tests, kidney and pelvic fat, tail, loin, rack and flank as well as higher dressing percentage and fat thickness. Geographic location affected weight at slaughter and some other carcass traits. It was concluded that there was a high genetic variation in carcass traits of lambs from different geographic location in Sulaimani province.
Źródło:
World Scientific News; 2019, 123; 265-273
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis and evaluation of massive MIMO system
Autorzy:
Al-Rawi, Muaayed F.
Abbou, Izz K.
Al-Awad, Nasir A.
Powiązania:
https://bibliotekanauki.pl/articles/118039.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
performance analysis
MIMO
Rician fading channels
analiza wydajności
zanikający kanał Rician
Opis:
This article examines the performance of massive MIMO uplink system over Rician fading channel. The performance is estimated regarding spectral efficiency versus number of base station antennas utilizing three plans of linear detection, maximum-ratio-combining (MRC), zero forcing receiver (ZF), and minimum mean-square error receiver (MMSE). The simulation results reveal that the spectral efficiency increments altogether with expanding the quantity of base station antennas. Additionally, the spectral efficiency with MMSE is superior to that with ZF, and the last is superior to that with MRC. Furthermore, the spectral efficiency diminishes with expanding the fading parameter.
Źródło:
Applied Computer Science; 2020, 16, 2; 112-119
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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