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RISS 인기검색어
- 검색키워드
- 저자 : ( Erdal Polat ) (검색결과 3 건)
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An improved particle swarm optimizer for steel grillage systems
Erdal, Ferhat,Dogan, Erkan,Saka, Mehmet Polat Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.47 No.4
In this paper, an improved version of particle swarm optimization based optimum design algorithm (IPSO) is presented for the steel grillage systems. The optimum design problem is formulated considering the provisions of American Institute of Steel Construction concerning Load and Resistance Factor Design. The optimum design algorithm selects the appropriate W-sections for the beams of the grillage system such that the design constraints are satisfied and the grillage weight is the minimum. When an improved version of the technique is extended to be implemented, the related results and convergence performance prove to be better than the simple particle swarm optimization algorithm and some other metaheuristic optimization techniques. The efficiency of different inertia weight parameters of the proposed algorithm is also numerically investigated considering a number of numerical grillage system examples.
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An improved particle swarm optimizer for steel grillage systems
Ferhat Erdal,Erkan Doğan,Mehmet Polat Saka 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.47 No.4
In this paper, an improved version of particle swarm optimization based optimum design algorithm (IPSO) is presented for the steel grillage systems. The optimum design problem is formulated considering the provisions of American Institute of Steel Construction concerning Load and Resistance Factor Design. The optimum design algorithm selects the appropriate W-sections for the beams of the grillage system such that the design constraints are satisfied and the grillage weight is the minimum. When an improved version of the technique is extended to be implemented, the related results and convergence performance prove to be better than the simple particle swarm optimization algorithm and some other metaheuristic optimization techniques. The efficiency of different inertia weight parameters of the proposed algorithm is also numerically investigated considering a number of numerical grillage system examples.
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In Vitro Effects of Rabeprazole on Human Pylorus Tone
( Necdet Fatih Yasar ),( Erdal Polat ),( Mustafa Duman ),( Meltem Dagdelen ),( Mehmet Yalcın Gunal ),( Orhan Uzun ),( Cebrail Akyuz ),( Kıvanc Derya Peker ),( Sinan Yol ) 대한소화기기능성질환·운동학회 2015 Journal of Neurogastroenterology and Motility (JNM Vol.21 No.2
Background/Aims It has been reported that proton pump inhibitors induce relaxation in different types of smooth muscles. The aim of this study is to investigate in vitro effects of proton pump inhibitors on human pylorus muscle. Methods Pyloric sphincters were studied in 10 patients who were operated for stomach cancer. In isolated organ bath, control and response to rabeprazole were recorded following contraction with carbachol. During the treatment experiment, while distilled water was applied during the control experiment in every 5 minutes, rabeprazole was administered in every 5 minutes at doses of 10-6, 10-5, 10-4, and 10-3 M respectively. Contraction frequencies, maximum contraction values and muscle tones were measured. Results The contraction frequencies in the control group were greater than the rabeprazole group in the second, third and fourth intervals while the maximum contraction values in the rabeprazole group were lower in the fourth interval. Even though muscles tones were not different in both groups during all intervals, it was remarkable that the muscle tone was significantly decreased in the rabeprazole group during the fourth interval compared to the first and second intervals. Conclusions In the present study, high doses of rabeprazole reduced contraction frequencies, maximum contraction values, and muscle tone of human pylorus. (J Neurogastroenterol Motil 2015;21:217-221)
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