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RISS 인기검색어
- 검색키워드
- 저자 : Manafi, M. (검색결과 5 건)
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Manafi, M.,Hedayati, M.,Khalaji, S. Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.9
This study was conducted to evaluate the effects of phytogenic additive and antibiotic growth promoter in laying Japanese quails. One hundred and sixty five quails were divided into three groups of 5 replicates and 11 quails (8 females and 3 males) in each replicate. Treatment 1 was fed control diet, treatment 2 was fed control diet supplemented with 0.05% bacitracin methylene disalicylate as antibiotic growth promoter and treatment 3 was fed control diet supplemented with 0.1% phytogenic feed additive (PFA) for two periods of 3 weeks each from 37 to 42 weeks of age. Results showed that egg production, eggshell strength, eggshell weight, villus height and villus height to crypt depth ratio were significantly (p${\leq}$0.05) increased and feed consumption, feed conversion ratio, albumen, Haugh unit, cholesterol, low-density lipoprotein, alanine transaminase, gamma glutamyltransferase, alkaline phosphatase, high-density lipoprotein, triglyceride, number of goblet cell, crypt depth and intestinal bacterial population of Coliforms, Salmonella and E. coli were significantly (p${\leq}$0.05) decreased in PFA fed group. It is concluded that addition of PFA containing phytomolecules and organic acids as main ingredients could significantly improve the production parameters and the general health of laying quails as an alternative to antibiotic growth promoters.
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Mixed mode I/II fracture criterion to anticipate behavior of the orthotropic materials
Hannaneh Manafi Farid,Mahdi Fakoor 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.34 No.5
The new energy-based criterion, named Reinforcement Strain Energy Density (ReiSED), is proposed to investigate the fracture behavior of the cracked orthotropic materials in which the crack is embedded in the matrix along the fibers. ReiSED is an extension of the well-known minimum strain energy density criterion. The concept of the reinforced isotropic solid as an advantageous model is the basis of the proposed mixed-mode I/II criterion. This model introduces fibers as reinforcements of the isotropic matrix in orthotropic materials. The effects of fibers are qualified by defining reinforcement coefficients at tension and shear modes. These coefficients, called Reduced Stress (ReSt), provide the possibility of encompassing the fiber fraction in a fracture criterion for the first time. Comparing ReiSED fracture limit curve with experimental data proves the high efficiency of this criterion to predict the fracture behavior of orthotropic materials.
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Hassan Manafi Miralilu,Mahdi Salimi,Jafar Soltani,Adel Akbarimajd 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.8
Due to the nonlinear behavior of grid-connected cascaded multilevel inverters (GCCMI), the use of nonlinear controllers can guarantee system stability over a wide range of operation. Therefore, state-space modeling is required to design nonlinear controllers. In this manuscript, a comprehensive method is proposed for the general state-space modeling of an n-level GCCMI with LCL coupling. To validate the accuracy of obtained state-space model, an experimental setup of a cascaded multilevel inverter including two H-bridges has been implemented. The outputs of the state-space model are compared with the simulation and experimental results of the GCCMI. This shows that the proposed model is compatible with a real closedloop system. The simulations were performed using EMTDC/PSCAD software. In the following, the designed general model is used to develop a nonlinear controller based on the Lyapunov stability criteria for a multilevel shunt active power filter (SAPF). Results show that the designed controller is stable and robust in a wide range of operating point changes.
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Moslemi-firoozabadi Hamidreza,Manafi Sahebali,Ghahremani Davoud 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.6
This study focused on the production of mullite ceramic and composites containing HfN reinforcements through spark plasma sintering. Accordingly, 5, 10 and 15wt% HfN powders with calcined Aluminum nitrate nonahydrate (ANN) and colloidal silica mixture were blended through a high-energy mixer mill in ethanol media. Spark plasma sintering of mullite ceramic and composite was performed under almost the same condition consisting of the initial and fi nal applied pressure of 10 and 50 MPa, respectively, vacuum of 15–25 Pa, and the maximum sintering temperature of 1350 °C. The measured relative den- sities showed the nearly full densifi cation of all prepared samples. The XRD patterns also depicted perfect mullitization for the mullite sample, while in the sintered composites, mullite, HfN and HfO 2 peaks were obtained as the crystalline phases. The uniform distribution of HfN and HfO 2 as the reaction products of ANN water desorption was recognized in the micro- structure of mullite composites with 5 and 10 wt% HfN samples. Meanwhile, the mullite-15wt% HfN composite displayed some agglomerates and porosities. The attained mechanical properties also showed that Vickers hardness was increased by raising HfN contents. However, the maximum bending strength of 424 ± 25 and fracture toughness of 3.74 ± 0.22 MPa m 1/2 were achieved for the composite containing 10 wt% HfN.
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Akbar Zamaniyan,Yadollah Mortazavi,Hossein Manafi,Abbas Ali Khodadadi 한국공업화학회 2011 Journal of Industrial and Engineering Chemistry Vol.17 No.4
A novel catalyst shape for reforming reaction, as an intraparticle diffusion limited-reaction, using bulk monolithic catalyst (BMC), the so-called tube fitted bulk monolithic catalyst (TFBMC), instead of conventional pellets is presented. A detailed analysis of the transport phenomena and proper models are introduced. The model is applied for natural gas reforming reaction and validated using industrial data. Then comparative model analysis and comparison for packed bed rector using conventional pellet shapes and TFBMC is presented. The results indicate that the TFBMC has superior advantages over the conventional pellet shapes especially with regards to the pressure drop and effective usage of the catalyst. Thus, TFBMC offer smaller reactor volume for processing similar feed flow which in turn results in less capital cost and also energy saving in the course of operation. Moreover, the TFBMC concept may be easily adapted to the present fixed bed reactors which use conventional pellet catalysts resulting more productivity and better performance.
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