Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Mansouri, A." wg kryterium: Autor


Wyświetlanie 1-7 z 7
Tytuł:
Analytical Representation of Total Cross-Sections for Electron Atom Scattering: Application to Atomic Helium
Autorzy:
Mansouri, A.
Houamer, S.
Moulay, M.
Powiązania:
https://bibliotekanauki.pl/articles/2036874.pdf
Data publikacji:
2003-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.-p
02.70.-c
Opis:
Based on the series expansion formalism, an analytical approach is proposed to evaluate the total cross-sections induced by electron impact excitation. As an illustration, an analytical expression of the total cross-section of the double excitation of helium atom by electron impact is obtained for the 2p$\text{}^{2}$ $\text{}^{3}$P and 2p3p $\text{}^{1}$P transitions within the framework of the distorted wave Born approximation. The available experimental data are well reproduced by the obtained expression of the total cross-section which is function of the only parameter of the incident electron energy. Comparisons are also made with numerical calculations.
Źródło:
Acta Physica Polonica A; 2003, 104, 1; 25-34
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Powerful nonlinear observer associated with field-oriented control of an induction motor
Autorzy:
Mansouri, A.
Chenafa, M.
Bouhenna, A.
Etien, E.
Powiązania:
https://bibliotekanauki.pl/articles/907397.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
silnik indukcyjny
obserwator nieliniowy
rezystancja wirnika
induction motor
field-oriented control
nonlinear observer
rotor resistance
Opis:
In this paper, we associate field-oriented control with a powerful nonlinear robust flux observer for an induction motor to show the improvement made by this observer compared with the open-loop and classical estimator used in this type of control. We implement this design strategy through an extension of a special class of nonlinear multivariable systems satisfying some regularity assumptions. We show by an extensive study that this observer is completely satisfactory at low and nominal speeds and it is not sensitive to disturbances and parametric errors. It is robust to changes in load torque, rotational speed and rotor resistance. The method achieves a good performance with only one easier gain tuning obtained from an algebraic Lyapunov equation. Finally, we present results and simulations with concluding remarks on the advantages and perspectives for the observer proposed with the field-oriented control.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 209-220
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Distribution and ecological risk assessment of heavy metals in roadside soil along the Hemat highway of Tehran, Iran
Autorzy:
Movafagh, A.
Mansouri, N.
Moattar, F.
Vafaeinejad, A. R.
Powiązania:
https://bibliotekanauki.pl/articles/207728.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
heavy metals
contamination
wetlands
highway
metale ciężkie
autostrada
grunty przydrożne
Opis:
The impact of land use and a distance from the highway on heavy metal concentration in soils along the highway has been investigated. 28 soil samples were collected in August 2014 from the roadside soils of the Hemmat highway of Tehran, Iran. The results showed that the mean concentrations of Pb, Cr, Ni, Zn and Cd were 144, 17.20, 18.91, 86.84, 3.86 mg/kg–1, respectively. With exception for Cd, the concentrations of the heavy metals decreased upon increasing distance from the highway that shows the background amount of cadmium in the soil area was high. The values of the enrichment factor (EF) showed that Ni, Zn and Cr have a natural source (EF < 10) and Pb and Cd have an anthropogenic source (EF > 10). The anthropogenic sources are emphasized for these heavy metals, thus indicating the strong human influence. The mean values of geoaccumulation index (Igeo) for Pb, Zn, Cd were high at residential, under-construction and green space land uses. The ecological risk index (RI) for roadside soils was higher than 300, indicating that sampling sites had a considerable ecological risk. The potential ecological risk index for single metal decreases in the following sequence: Cd > Pb > Ni > Zn > Cr.
Źródło:
Environment Protection Engineering; 2018, 44, 3; 5-17
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular characterization and seroprevalence of Echinococcus granulosus in wild boars (Sus scrofa) in south-western Iran
Autorzy:
Sarkari, B.
Mansouri, M.
Khabisi, S.A.
Mowlavi, G.
Powiązania:
https://bibliotekanauki.pl/articles/5608.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
molecular characteristics
seroprevalence
Echinococcus granulosus
wild boar
genotype
Sus scrofa
Iran
Opis:
This study presents the first molecular and serological evaluation of Echinococcus granulosus infections in wild boars in Iran. Twenty five wild boars were collected in south-western Iran, during authorized hunting program, from March to October 2013, necropsied and examined for E. granulosus infection. Furthermore, seroprevalence of cystic echinococcosis in hunted boars was evaluated by an ELISA system. A fertile hydatid cyst due to E. granulosus was detected in the lung of one of the animals. Genotype analysis of the isolate was determined by analyzing a mitochondrial gene, cytochrome C oxidase subunit 1 (co1). DNA was extracted from the cyst sample and polymerase chain reaction amplification and DNA sequencing of the specific region of the co1 gene was performed. Molecular evaluation confirmed the presence of a sheep strain, the G1 genotype, in the wild boar in south-western Iran. This is the first report of the presence of G1 genotype of E. granulosus in wild boar in Iran. Serological evaluation of hydatid cyst by antigen-B ELISA revealed E. granulosus antibodies in 5 (20%) of 25 wild boars. A statistically significant difference was observed between the prevalence of E. granulosus antibodies and gender while the difference between the seroprevalence of E. granulosus and age was insignificant. Findings of this study might have important implications for the prevention and control of cystic echinococcosis.
Źródło:
Annals of Parasitology; 2015, 61, 4
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porosity, characterization and structural properties of natural zeolite - clinoptilolite - as a sorbent
Autorzy:
Mansouri, N.
Rikhtegar, N.
Panahi, H. A.
Atabi, F.
Shahraki, B. K.
Powiązania:
https://bibliotekanauki.pl/articles/207789.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
zeolites
mesoporosity
natural zeolites
nitrogen adsorption
porous structures
clinoptilolite
zeolity
klinoptylolit
mezoporowatość
zeolity naturalne
adsorpcja azotu
struktury porowate
Opis:
The characterization and porous structure of raw and modified clinoptilolite as a sorbent has been investigated by nitrogen adsorption, X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectroscopy, differential thermal analysis, scanning electron microscopy and atomic force microscopy methods. The nitrogen adsorption data revealed that the total pore volume and specific surface area were increased after modification. The nitrogen adsorption was used to determine percent of mesoporosity. The TG data show that 14 wt. % of clinoptilolite is lost after heating up to 1200 °C. Two types of porosities - primary porosity (microporosity) and secondary one (meso- and macroporosity) have been observed.
Źródło:
Environment Protection Engineering; 2013, 39, 1; 139-152
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temporal Trend of Occupational Injuries; First Versus Second Half of a Working Shift
Autorzy:
Sanati, K. A.
Yadegarfar, G.
Naghavi, H.
Mansouri, M.
Sanati, J. G. H.
Powiązania:
https://bibliotekanauki.pl/articles/90768.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
occupational injury
temporal trend
hospital referral
shift work
external causes of injury
synthetic fibre factory
Iran
Opis:
Objectives. To assess occupational injuries in the 1st versus 2nd half of a working shift in terms of (a) the likelihood of hospital referral following an injury event; (b) the external causes of injuries. Methods. Logistic regression analyses of data from a 16-year (1991–2007) experience of ongoing surveillance of occupational injuries in a synthetic fiber factory in Iran. Results. The likelihood of a hospital referral following an injury in the 1st half of a shift was higher than in the 2nd half (adjusted odds ratio [OR] 1.50, 95% confidence interval [CI] 1.10–2.00). Comparing the 2 halves of the shift, an injury occurring in the 2nd half was more likely to be due to exposure to smoke, fire and flames (OR 2.34, 95% CI 1.06–5.19) or transport accidents (OR 1.84, 95% CI 1.06–3.21). Conclusions. Time-specific safety interventions could be used in the risk management of occupational injuries. Further studies to investigate the effect of time-dependent interventions are recommended.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 1; 49-54
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies