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RISS 인기검색어
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- 저자 : ( Gholamreza Moradi ) (검색결과 3 건)
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Gholamreza Moradi,Fereydoon Yaripour,Hossein Abbasian,Mostefa Rahmanzadeh 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.5
The kinetic behavior of a commercial γ-Al2O3 catalyst for the methanol to dimethyl ether (DME) dehydration reaction has been investigated using a differential fixed bed reactor at the pressure range 1-16 barg within a temperature range of 260-380 oC. The experimental runs were performed in a wide range of feed to water ratios. The experiments were designed by general full factorial design (GEFD) and a novel rate equation has been developed which exhibited the best fitting with our experimental data. Based on the analysis of variance (ANOVA), the following order of importance for operating conditions was obtained when the objective function is the yield of DME: Temperature>Water %in feed>Pressure. In addition, the optimum operating conditions for the maximum yield of DME, were found at T=380 oC, P=16 barg and zero wt% of water in the feed.
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( Mostafa Bahremand ),( Gholamreza Moradi ),( Mozhgan Saeidi ),( Samira Mohammadi ),( Saeid Komasi ) 대한통증학회 2015 The Korean Journal of Pain Vol.28 No.2
Background: Patients suffering from non-cardiac chest pain (NCCP) can interpret their chest pain wrongly despite having received a correct diagnosis. The objective of this study was to compare the efficacy of the relaxation method with metaphor therapy for reducing irrational beliefs and pain severity in patients with NCCP. Methods: Using a randomized controlled trial, 33 participants were randomly divided into a relaxation training group (n= 13), a metaphor therapy group (n = 10), and a control group (n = 10), and were studied for 4 weeks. The two tools used in this research were the Brief Pain Inventory (BPI) index for determining the degree of pain and the short version of the Jones Irrational Belief Test. Metaphor therapy and a relaxation technique based on Ost’s treatment were used as the interventions. The collected data were analyzed with a multivariate analysis of covariance (MANCOVA), a Chi-square test, and the Bonferroni procedure of post-hoc analysis. Results: The relaxation training method was significantly more effective than both metaphor therapy and the lack of treatment in reducing the patients’ beliefs of hopelessness in the face of changes and emotional irresponsibility, as well as the pain severity. Metaphor therapy was not effective on any of these factors. In fact, the results did not support the effectiveness of metaphor therapy. Conclusions: Regarding the effectiveness of the relaxation method as compared with metaphor therapy and the lack of treatment in the control group, this study suggests that relaxation should be paid greater attention as a method for improving the status of patients. In addition, more studies are needed to determine the effectiveness of metaphor therapy in this area. (Korean J Pain 2015; 28: 88-95)
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Design and Simulation of a Reflectarray Antenna using New Cell for Different Beam Angles
Iman Aryanian,Abdolali Abdipour,Gholamreza Moradi 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.6
In this paper a new cell is proposed for reflectarray antenna and is used to design the antenna to obtain to maximum gain and efficiency using phase synthesis in a frequency band of 11 GHz up to 11.7 GHz for different beam angles. The proposed cell is a double ring of hexagon which introduces multiple resonances which can provide more than 360 degrees phase variation by changing the loop size. Design method is based on phase-only algorithm where amplitude of the field on the reflectarray surface is forced by the feed. A 1.2 m reflectarray is designed for different beam directions. The results show maximum directivity of 42 dB and maximum efficiency of 73% for the required bandwidth. Focal length is 1.5 m which is set for maximum efficiency.
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