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Your search keyword '"Mousavi, Seiyed Hamid"' showing total 6 results
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6 results on '"Mousavi, Seiyed Hamid"'

3. Duration Estimation of Steel Framing Activities Using an Artificial Intelligent Algorithm and Top Risk Scores for High-Rise Buildings.

Author

Jawad, Dima and Mousavi, Seiyed Hamid

Subjects
ARTIFICIAL intelligence, ARTIFICIAL neural networks, FUZZY logic, STEEL framing, HIGH-rise apartment buildings
Abstract

Underestimation or overestimating activities' duration in construction projects leads to many problems like lack of funding or procrastination. However, estimating duration accurately for construction projects is difficult because of many factors like identified and unidentified negative risks. This paper tried to estimate realistic durations of steel framing activities in a high-rise building using a combination of Artificial Neural Networks (ANNs) and fuzzy logic algorithms with data from five similar projects. Initial planned durations and the top five pure risks are the inputs, and estimated actual durations are the outputs. The data from the first four projects was for training, and the fifth one was for simulation. Then, the estimated expected actual durations under uncertainties are compared to the actual durations of the project. The results showed that about 75% of the fifth project's activities had errors of less than three days compared to the actual durations. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Semiactive dynamic model of the rail track–vehicle system to reduce the vertical contact force interaction using magnetorheological dampers.

Author

Mousavi, Seiyed Hamid

Subjects
*MAGNETORHEOLOGICAL dampers, *DYNAMIC models, *RAILROAD trains, *SINGLE-degree-of-freedom systems, *MOTOR vehicle springs & suspension, *RAILROAD rails, *HIGH speed trains
Abstract

In the current research, a semiactive suspension system is presented as a railway vehicle to investigate the rail track–vehicle interaction using magnetorheological dampers. For this purpose, a dynamic model of a railway vehicle is introduced, based on the integrated magnetorheological dampers, to reduce the vertical interaction of the rail track and the vehicle system. The model includes a railway vehicle with 10 degrees of freedom and the track with six coupled subsystems via the nonlinear Hertz contact mechanism. To verify the proposed model, a test data which is reported in the literature is used, and then the rail track–vehicle interaction of the semiactive system is compared with the passive system. The results show that the semiactive system could significantly reduce the interaction. [ABSTRACT FROM AUTHOR]

Published
2021
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