Informacja

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

Wyszukujesz frazę "Moradi, M." wg kryterium: Autor


Tytuł:
Experimental and numerical investigation of the deep drawing process for an automobile panel and prediction of appropriate amount of parameters by multi-layer neural network
Autorzy:
Najafabadi, S. S.
Anaraki, A. T.
Moradi, M.
Tematy:
deep drawing
finite element analysis (FEA)
multi-layer artificial neural network (ANN)
Taguchi design
Pokaż więcej
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:
https://bibliotekanauki.pl/articles/281868.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, the deep drawing process of an automobile panel in order to select the appropriate amount of parameters has been investigated. The parameters include friction between the blank and die, blank width and length, blank thickness and gap between the blank and blank-holder. A multi-layer artificial neural network (ANN) trained by finite element analyses (FEA) is applied in order to improve forming parameters and achieve a better quality. As the FEA results are used to train the ANN, the FEA results have been verified by three experiments. Finally, an appropriate amount of each parameter is predicted by the trained ANN and a FEA has been done based on the ANN prediction to evaluate the accuracy of the trained ANN. Moreover, it is shown that the ANN could predict results within a 10 percent error. In addition, the proposed method for prediction of the appropriate parameters (ANN) is confirmed by comparing with the Taguchi design of experiment prediction. It is also shown that the model obtained by the former method has lower errors than the latter one. In this study, the Taguchi model is used to evaluate the effect of parameters on tearing and wrinkling. Based on the Taguchi design of experiment, while the blank length is the most effective parameter on tearing, the maximum height of wrinkles on flanged parts mainly depends on the blank thickness.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response surface methodology (RSM) and its application for optimization of ammonium ions removal from aqueous solutions by pumice as a natural and low cost adsorbent
Autorzy:
Moradi, M.
Fazlzadehdavil, M.
Pirsaheb, M.
Mansouri, Y.
Khosravi, T.
Sharafi, K.
Tematy:
pumice
ion adsorption
response surface methodology
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/950773.pdf  Link otwiera się w nowym oknie
Opis:
This research was conducted to study the adsorption of ammonium ions onto pumice as a natural and low-cost adsorbent. The physico-chemical properties of the pumice granular were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Modeling and optimization of a NH4+ sorption process was accomplished by varying four independent parameters (pumice dosage, initial ammonium ion concentration, mixing rate and contact time) using a central composite design (CCD) under response surface methodology (RSM). The optimum conditions for maximum removal of NH4+ (70.3%) were found to be 100 g, 20 mg/l, 300 rpm and 180 min, for pumice dosage, initial NH4+ ion concentration, mixing rate and contact time. It was found that the NH4+ adsorption on the pumice granular was dependent on adsorbent dosage and initial ammonium ion concentration. NH4+ was increased due to decrease the initial concentration of NH4 and increase the contact time, mixing rate and amount of adsorbent.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biocontrol potential of Trichoderma harzianum in controlling wilt disease of pistachio caused by Verticillium dahliae
Autorzy:
Fotoohiyan, Z.
Rezaee, S.
Bonjar, G.H.S.
Mohammadi, A.H.
Moradi, M.
Tematy:
biological control
Trichoderma harzianum
controlling
wilt disease
antagonism
pistachio
orchard
Verticillium dahliae
Iran
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/65568.pdf  Link otwiera się w nowym oknie
Opis:
Verticillium wilt caused by Verticillium dahliae, is one of the most devastating diseases in pistachio orchards in the world including Iran. In search for an eff ective non-chemical strategy for the management of this disease, we evaluated the biocontrol potential of Trichoderma harzianum isolates obtained from the rhizosphere of healthy pistachio trees in diff erent locations of the Kerman province of Iran against V. dahliae under laboratory and greenhouse conditions. Dual culture tests in the laboratory were conducted in a completely randomized design using 72 T. harzianum isolates. Twenty isolates showed the highest in vitro antagonistic activity. Th e results indicated that all 20 isolates were capable of inhibiting the mycelial growth of V. dahliae signifi cantly. Among them, isolates Tr8 and Tr19 were the most eff ective by 88.89% and 85.12% inhibition, respectively. Extracted cell free metabolites of all eff ective isolates also inhibited the growth of V. dahliae in the culture medium signifi cantly. According to the results, isolates Tr4 and Tr6 inhibited fungal pathogen growth by 94.94% and 88.15% respectively, through production of non-volatile metabolites. In the evaluation of volatile metabolites, isolates Tr5 and Tr4 were the most eff ective by 26.27% and 24.49% growth inhibition, respectively. Based on the results of the in vitro experiments, the fi ve most eff ective isolates were selected for evaluation under greenhouse conditions for their biocontrol potential in controlling Verticillium wilt of pistachio. Results of the greenhouse, (in vivo) experiments were positive and indicated that the occurrence of wilt disease in plants treated with the antagonists alone or in combination with pathogenic fungus was lower than in plants inoculated with pathogen alone. Th e overall results of this study suggest that Trichoderma fungal antagonist may be an eff ective biocontrol agent for the control of Verticillium wilt of pistachio.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of knowledge management practices on supply chain quality management and competitive advantages
Autorzy:
Azizi, R.
Maleki, M.
Moradi-Moghadam, M.
Cruz-Machado, V.
Tematy:
knowledge management
practices
supply chain
quality management
structural equation modeling
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/406697.pdf  Link otwiera się w nowym oknie
Opis:
Achieving competitive advantage enables an organization to create a defensible position against its competitors. It also allows organizations to differentiate themselves from competitors. This study aims to investigate impact of knowledge management practices on supply chain quality management and competitive advantage in Alyaf Company, Iran. This research is functional in purpose and data gathering and data analysis is descriptive-correlation. The statistical population is consists of 25 company executives and experts in the supply chain of Alyaf Company; opinions of 68 of its members were used as a selective sample identified by simple random sampling method. Primary data was collected through questionnaire and structural equation modeling was used to assess relationships between variables. The results of structural equation modeling show a positive and significant causal relationship between knowledge management practices and supply chain quality management. Direct relationship between knowledge management and competitive advantage was not confirmed but the relationship between these two variables was confirmed indirectly.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultimate state boundedness of underactuated spacecraft subject to an unmatched disturbance
Autorzy:
Moradi, R.
Alikhani, A.
Jegarkandi, M. F.
Tematy:
underactuated spacecraft stabilization
non-matched disturbances
global uniform ultimate boundedness
Pokaż więcej
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:
https://bibliotekanauki.pl/articles/280303.pdf  Link otwiera się w nowym oknie
Opis:
Ultimate state boundedness for underactuated spacecraft subject to large non-matched disturbances is attained. First, non-smooth time-invariant state feedback control laws that make the origin asymptotically stable are obtained. Then, the controller is extended to make the closed-loop system globally uniformly ultimately bounded under the following conditions: 1) the disturbances acting on the directly actuated states are known and 2) the disturbance acting on the unactuated state is bounded and its profile need not be known. Finally, numerical simulations are presented to verify the analytical results. A large step disturbance is considered, and it is shown that the proposed controller makes the closed-loop system globally uniformly ultimately bounded. The proposed method is rather general and can be extended to other systems.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Buxtonella spp. like infection in cattle in Sanandaj province, Iran
Autorzy:
Hasheminasab, S.S.
Moradi, P.
Talvar, H.M.
Wright, I.
Darbandi, M.S.
Tematy:
Buxtonella sulcata
animal infection
prevalence
buxtonellosis
cattle
Sanandaj province
Iran
Pokaż więcej
Wydawca:
Polskie Towarzystwo Parazytologiczne
Powiązania:
https://bibliotekanauki.pl/articles/6215.pdf  Link otwiera się w nowym oknie
Opis:
Buxtonellosis is a disease caused by the ciliated protozoan Buxtonella sulcata (Jameson, 1926). B. sulcata is a common protozoan of ruminants and may result in subclinical infection or clinical disease including diarrhea. This study examined the prevalence of B. sulcata in cattle from Sanadaj province, Iran. Faecal samples were collected from cattle in the province from May 2013 to June 2014. A total of 217 cattle were selected randomly according to the age, sex, health, management system and season. In total, 99 cattle (45.63%) were found to be infected with B. sulcata. In adults, prevalence of B. sulcata infection (51.64%) was higher than calves (28.58%) and young cattle (40.55%). The prevalence of B. sulcata infection was also found to be higher in female (47.32%) than male (38.46) cattle. B. sulcata infection was significantly (p<0.05) higher in poor health cattle (body condition and weight) (79.54%) than healthy cattle (24.47%). This study demonstrates that cattle are highly susceptible to B. sulcata infection under a variety of housing and environmental conditions in this region of Iran. The study also demonstrates a significant effect of infection on cattle health.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation and relationships of aerial yield, morpho-agronomic traits and essential oil composition in domestic populations of Ziziphora tenuior in Iran
Autorzy:
Moradi, R.
Alizadeh, M.A.
Hervan, E.M.
Shanjani, P.S.
KhanghaniS.
Jafari, A.A.
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:
https://bibliotekanauki.pl/articles/12703281.pdf  Link otwiera się w nowym oknie
Opis:
The present study was carried out to evaluate aerial yield, agronomic traits, essential oil production, and their relationships in 21 populations of Ziziphora tenuior in Karaj, Iran over two years (2016–2017). The experimental layout was a randomized complete block design with three replications. Data were collected for GDD (Growth Degree Days), plant height, canopy area, stem number, flower number, aerial fresh yield, aerial dry matter (DM) yield, seed yield, essential oil percentage and oil production. The essential oil compositions were detected in accession 2929 (Tassoj) using GC/MS. Result of combined analysis of variance across two years showed significant differences between years, populations and population × year interaction for all traits (P < 0.01). In comparisons among populations, the population of Avaj and Ijroud with average values of 13.5 and 14.33 g/p had higher aerial dry yield and other agronomic traits followed by Meshkin2 and 3. For seed yield, Ormieh with average values of 3.11 g/p had higher production. For oil content, the populations of Tassoj, Salmas and Sharkord with average values of 1.25 to 1.56% had higher oil content and essential oil production. Result of correlation analysis showed that DM yield was positively correlated with GDD, plant height, canopy area, stem number, flower number. Oil content was negatively correlated with aerial DM yield. The results of PCA analysis showed that the first four components accounted for 50, 20, 12 and 10% of the total variation, respectively. Plant height, canopy area, stem number, flower number and aerial yield in the PCA1, essential oil content and oil production in the PCA2, seed yield in the PCA3 and GDD in PCA4 components were identified as important traits. Using Ward cluster method, the 21 populations were grouped into 3 clusters. In total, 23 compounds were identified in the essential oil from the aerial parts Z. tenuior. The major components in the essential oil were pulegone ranged (47.54 to 65.26%) followed by neo-iso-dihydro carveol, carvacrol, piperitenone, limonene, 1.8-cineole, p-mentha-3,8-dien, alpha-terpinene and terpinen-u-ol. It was concluded that there were wide range of variations for agronomic trait and essential oil in domestic germplasm of Z. tenuior to improved breeding new varieties in Iran.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of modified maize hull for removal of Cu(II) ions from aqueous solutions
Autorzy:
Ghasemi, S. M.
Mohseni-Bandpei, A.
Ghaderpoori, M.
Fakhri, Y.
Keramati, H.
Taghavi, M.
Moradi, B.
Karimyan, K.
Tematy:
heavy metal ions
waste water
Cu(II)
ions
adsorption
biomass
jony metali ciężkich
ścieki
biomasa
adsorpcja
Pokaż więcej
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/208248.pdf  Link otwiera się w nowym oknie
Opis:
Discharge of industrial waste containing heavy metals to the environment is a main concern because of their toxicity to many life forms. Adsorption process is one of the conventional methods in order to adsorb heavy metals from wastewater effluents. Therefore, the removal of Cu(II) from aquatic solutions using modified maize hull was investigated. All experiments were performed in batch conditions. The residual Cu(II) concentration was measured by AAS. Upon increasing the adsorbent dosage, pH, and contact time and decreasing Cu(II) concentration, the removal efficiency of Cu(II) ions increased. In optimum conditions, 50% of copper was removed by modified maize hull. The experimental data were best fitted by the Langmuir type 2 model and the adsorption kinetic model followed a pseudo-second order type 1 model. It seems that the use of the modified maize hull to remove Cu(II) ions is very suitable, low-cost, and efficient.
Dostawca treści:
Biblioteka Nauki
Artykuł

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