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E. Alipanahpour Dil,M. Ghaedi,A.M. Ghaedi,A. Asfaram,A. Goudarzi,S. Hajati,M. Soylak,Shilpi Agarwal,Vinod Kumar Gupta 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
The novel adsorbent i.e. ZnO–NR–AC was synthesized and used for the rapid removal of the quaternarydyes from the aqueous solution. The ANN model was used for the optimization and modeling ofsonication time, amount of sorbent and dyes concentrations to study their simultaneous adsorptionbased on achievement of minimum mean squared error as criterion. The optimized parameters wasfound to be 4 min sonication time, 0.022 g of ZnO–NR–AC; MB, EY, CV and AO concentrations were 8.0,9.7, 8.0 and 10.6 mg L 1possible to achieve the removal percentage of 99.89, 99.2, 99.68 and 99.45% forMB, EY, CV and AO, respectively. The analysis of variance (ANOVA) support the high suitability ofachieved equation for the efficient prediction of understudy adsorption system behavior that proofed bythe presence of good agreement among the predicted and experimental data. The Langmuir isothermmodel with maximum adsorption capacities were 89.29, 93.46, 87.52 and 88.5 mg g 1 correspond toMB, CV, EY and AO, respectively.
Adopting flexibility of the end-plate connections in steel moment frames
M. Ghassemieh,M. Baei,A. Kari,A. Goudarzi,D.F. Laefer 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.5
The majority of connections in moment resisting frames are considered as being fully-rigid. Consequently, the real behavior of the connection, which has some level of flexibility, is ignored. This may result in inaccurate predictions of structural response. This study investigates the influence of flexibility of the extended end-plate connections in the steel moment frames. This is done at two levels. First, the actual micro-behavior of extended end-plate moment connections is explored with respect to joint flexibility. Then, the macro-behavior of frames with end-plate moment connections is investigated using modal, nonlinear static pushover and incremental dynamic analyses. In all models, the P-Delta effects along with material and geometrical nonlinearities were included in the analyses. Results revealed considerable differences between the behavior of the structural frame with connections modeled as fully-rigid versus those when flexibility was incorporated, specifically difference occurred in the natural periods, strength, and maximum inter-story drift angle.