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generic-models
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Consistent one-bay frame simplified model for efficient seismic evaluation of steel moment frame buildings with equal and unequal bay lengths
, Article Structures ; Volume 34 , December , 2021 , Pages 3345-3362 ; 23520124 (ISSN) ; Ahmadie Amiri, H ; Esmaeil Estekanchi, H ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
A Consistent One-Bay Frame (COBF) simplified model for the efficient estimation of Engineering Demand Parameters (EDPs) in Steel Moment Resisting Frames (SMRFs) with equal and unequal bay lengths is proposed. The geometry of the Substitute One-Bay Frame (SOBF) simplified model has been used, and the elastic and inelastic properties of the beams and columns in this model are determined using an energy consistent approach in a way that the energy balance is established between the members of the original SMRF and the SOBF simplified model. This way, the SOBF simplified model, which originally could only be used for MRFs with equal bay lengths, can now be used for MRFs with any geometric...
Seismic risk analysis with reliability methods, part I: Models
, Article Structural Safety ; Volume 42 , 2013 , Pages 54-62 ; 01674730 (ISSN) ; Haukaas, T ; Sharif University of Technology
2013
Abstract
A library of probabilistic models for prediction of seismic risk is presented. The models are specifically intended for use with reliability methods to compute event probabilities, such as seismic loss probabilities. Several models are presented here for the first time. In particular, new and generic models are proposed for earthquake location, regional loss, building response, building damage, and building loss. Each model is presented with an explanation of its development and a discussion of its predictions. In addition, models from the literature are " smoothed" to make them amenable to reliability analysis. The models are implemented in a new computer program that is tailored for...
Modeling security protocols using operational semantics
, Article ICEIT 2010 - 2010 International Conference on Educational and Information Technology, Proceedings, 17 September 2010 through 19 September 2010, Chongqing ; Volume 3 , 2010 , Pages V3179-V3185 ; 9781424480340 (ISBN) ; Mahrooghi, H ; Movaghar, A ; Faraahi, A ; Sharif University of Technology
2010
Abstract
In this paper we develop a formal semantics of security protocols. Its main virtue is that it is a generic model, in the sense that it is parameterized over e.g. the intruder model. Further characteristics of the model are a straightforward handling of parallel execution of multiple protocols, locality of security claims, the binding of local constants to role instances, and explicitly defined initial intruder knowledge. We validate our framework by analyzing the Needham-Schroeder-Lowe protocol
The Application of Simplified MDOF Models for Estimating the Moment Resisting Frames Seismic Demands in Endurance Time Method
, M.Sc. Thesis Sharif University of Technology ; Esmaeil Pourestekanchi, Homayoon (Supervisor)
Abstract
Modified Fish-Bone (MFB) Model and Consistent Generic (CG) Model are simplified Multi-Degrees-of-Freedom (MDOF) models, proven to be valuable tools in estimating seismic demands of moment-resisting frames, aimed to reduce the computational costs by decreasing the number of degrees of freedom. The preliminary expansion of these simplified models for steel moment resisting frames (SMRFs) were proposed by considering elastoplastic behavior and is not able to take into account stiffness and strength deteriorations in nonlinear dynamic behavior of structures. However, behavior deterioration affects seismic demands of SMRFs under intense earthquakes. For this reason, the present study is done to...
Improved generic model of variable speed wind turbines for dynamic studies
, Article IEEE Transactions on Sustainable Energy ; Volume 11, Issue 4 , October , 2020 , Pages 2162-2173 ; Ravanji, M. H ; Parniani, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2020
Abstract
Fast growth of wind power generation and its contribution in power systems dynamic performance has highlighted the importance of developing generic models for wind turbines. Following the former efforts, an enhanced version of standard generic wind turbine model is proposed in this article. The enhancements are aimed to make the model applicable for unbalanced Root Mean Square (RMS), short-Term frequency stability, and low-voltage ride-Through (LVRT) studies. Moreover, fidelity of the overall responses of the model is increased. To achieve these goals, five new blocks are designed and added to the base model and three existing blocks are modified. The new blocks are negative-sequence...
Towards MPEG4 compatible face representation via hierarchical clustering-based facial feature extraction
, Article ISCI 2011 - 2011 IEEE Symposium on Computers and Informatics ; 2011 , Pages 436-441 ; 9781612846903 (ISBN) ; Mosleh, M ; Sharif University of Technology
Abstract
Multi-view imaging and display systems has taken a divide and conquer approach to 3D sensing and visualization. We aim to make more reliable and robust automatic feature extraction and natural 3D feature construction from 2D features detected on a pair of frontal and profile view face images. We propose several heuristic algorithms to minimize possible errors introduced by prevalent imperfect orthogonal condition and non-coherent luminance trying to address the problems incurred with illumination discrepancies on common surface points in accommodation of multi-views. In our approach, we first extract the 2D features that are visible to both cameras in both views. Then, we estimate the...
Hybrid clustering-based 3D face modeling upon non-perfect orthogonality of frontal and profile views
, Article 2010 International Conference on Computer Information Systems and Industrial Management Applications, CISIM 2010, 8 October 2010 through 10 October 2010, Krackow ; 2010 , Pages 578-584 ; 9781424478170 (ISBN) ; Mosleh, M ; Sharif University of Technology
2010
Abstract
Multi view imaging has attracted increasing attention recently and has become one of the potential avenues in future video systems. We aim to make more reliable and robust automatic feature extraction and natural 3D feature construction from 2D features detected on a pair of frontal and profile view face images. We propose several heuristic algorithms to minimize possible errors introduced by prevalent non-perfect orthogonal condition and non-coherent luminance. In our approach, we first extract the 2D features that are visible to both cameras in both views. Then, we estimate the coordinates of the features in the hidden profile view based on the visible features extracted in the two...
Automatic MPEG4 compatible face representation using clustering-based modeling schemes
, Article 2010 International Conference on Computer Information Systems and Industrial Management Applications, CISIM 2010, 8 October 2010 through 10 October 2010, Krackow ; 2010 , Pages 96-102 ; 9781424478170 (ISBN) ; Mosleh, M ; Sharif University of Technology
2010
Abstract
Multi view imaging has attracted increasing attention recently and has become one of the potential avenues in future video systems. We aim to make more reliable and robust automatic feature extraction and natural 3D feature construction from 2D features detected on a pair of frontal and profile view face images. We propose several heuristic algorithms to minimize possible errors introduced by prevalent non-perfect orthogonal condition and non-coherent luminance. In our approach, we first extract the 2D features that are visible to both cameras in both views. Then, we estimate the coordinates of the features in the hidden profile view based on the visible features extracted in the two...