Autor: Belaidi, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Conformational Analysis, Substituent Effect and Structure activity Relationships of 16-Membered Macrodiolides
Autorzy:: Mazri, R.
Belaidi, S.
Kerassa, A.
Lanez, T.
Powiązania:: https://bibliotekanauki.pl/articles/412492.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: macrodiolide
antibiotic
structure
ab intio
PM3
Lipinski rule and QSAR Properties
Opis:: Electronic structures, Conformational Analysis, effect of the substitution and structure activity Relationships for macrodiolides, have been studied by PM3 and ab initio methods. In the present work, the calculated values, namely net charges, bond lengths, MESP, dipole moments, electron-affinities, heats of formation, drug-likeness and QSAR properties, are reported and discussed in terms of the biological activity of macrodiolides.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2014, 14, 2; 146-167
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Crack growth diagnostic of ball bearing using vibration analysis
Autorzy:: Belaidi, S.
Lecheb, S.
Chellil, A.
Mechakra, H.
Safi, B.
Kebir, H.
Powiązania:: https://bibliotekanauki.pl/articles/2174182.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: łożysko kulkowe
drgania
pękanie
zmęczenie
ball bearing
vibration analysis
frequency
cracking
diagnosis
fatigue life
Opis:: It is known that supported ball bearings have great effects on the vibrations of the gear transmission system, above in all the presence of local faults as well as the crack growths. For this purpose, this paper focuses on shock and vibration crack growth diagnostic of ball bearing using vibration analysis. Our work is devoted first to a study the static behaviour of the ball bearing by determining the stress, strain and displacement, then its dynamic behaviour by determining the first four natural frequencies. Secondly, a dynamic analysis study of the bearing was carried with defects as a function of crack size and location. The obtained results clearly show that the natural frequencies decrease in a non-linear way with the growth of the length of the crack, on the other hand the stress increases with the presence of the singular points of the crack. Finally, this residual decrease in natural frequencies can be used as an indicator of the state of failure, as well as a parameter used for the diagnosis and screening, and to highlight the fatigue life of the bearing.
Źródło:: International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 35--45
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Global Stability of Linearizing Control With a New Robust Nonlinear Observer of The Induction Motor
Autorzy:: Chenafa, M.
Mansouri, A.
Bouhenna, A.
Etien, E.
Belaidi, A.
Denai, M. A.
Powiązania:: https://bibliotekanauki.pl/articles/911129.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: obserwatory nieliniowe
sterowanie liniowe
silnik indukcyjny
stabilność globalna
nonlinear observer
linearizing control
induction motor
global stability
Opis:: This paper mainly deals with the design of an advanced control law with an observer for a special class of nonlinear systems. We design an observer with a gain as a function of speed. We study the solution to the output feedback torque and rotor flux-tracking problem for an induction motor model given in the natural frame. We propose a new robust nonlinear observer and prove the global stability of the interlaced controller-observer system. The control algorithm is studied through simulations and applied in many configurations (various set points, flux and speed profiles and torque disturbances), and is shown to be very efficient.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2005, 15, 2; 235-243
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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