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Institution

Amirkabir University of Technology

EducationTehran, Iran
About: Amirkabir University of Technology is a education organization based out in Tehran, Iran. It is known for research contribution in the topics: Nonlinear system & Fuzzy logic. The organization has 15254 authors who have published 31165 publications receiving 487551 citations. The organization is also known as: Tehran Polytechnic & Tehran Polytechnic University.


Papers
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Journal ArticleDOI
30 Nov 2012-Polymer
TL;DR: In this paper, the authors report evolving pore formation in both surface and interior structures of polystyrene (PS) fibers electrospun from solutions of dimethylformamide (DMF), as low, and tetrahydrofuran (THF) as high volatile solvents.

155 citations

Journal ArticleDOI
TL;DR: The optimal settings of overcurrent relays for eight-bus and England Norweb networks are obtained, and comparison between the new method and existing methods is made.
Abstract: In this paper, a new method for optimum coordination of overcurrent relays is proposed. The proposed method is based on only constraints. Minimization is inherently included by setting the time dials to minimum and increasing their values gradually. Configuration changes of the network are taken into account. The method does not need any initial solution. It can consider both linear and nonlinear relay characteristics models. The optimal settings of overcurrent relays for 8-Bus and England Norweb networks are obtained and comparison between the new method and existing methods is made.

155 citations

Journal ArticleDOI
TL;DR: In this article, the numerical solution of the one-dimensional parabolic equation subject to the specification of mass, which have been considered in the literature, is reported. And the performance of the proposed algorithm, considering a test problem, is investigated.
Abstract: Certain problems arising in engineering are modeled by nonstandard parabolic initial-boundary value problems in one space variable, which involve an integral term over the spatial domain of a function of the desired solution. Hence, in the past few years interest has substantially increased in the solutions of these problems. As a result numerous research papers have also been devoted to the subject. Although considerable amount of work has been done in the past, there is still a lack of a completely satisfactory computational scheme. Also, there are some cases that have not been studied numerically yet. In the current article several approaches for the numerical solution of the one-dimensional parabolic equation subject to the specification of mass, which have been considered in the literature, are reported. Finite difference methods have been proposed for the numerical solution of the new nonclassic boundary value problem. To investigate the performance of the proposed algorithm, we consider solving a test problem. © 2005 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2006

154 citations

Journal ArticleDOI
TL;DR: In this article, the effects of crosslinker concentration on the pepsin enzyme activity have been studied using variation of relative viscosity of the system and the results showed that with increasing crosslinkers agent concentration activity activity of enzyme reduces considerably and so cross-linker molar ratio to amine functional groups.
Abstract: Chitosan was crosslinked with different amount of glutaraldehyde to prepare appropriate hydrogels to be used as drug delivery system. The swelling behavior of freeze-dried hydrogels in aqueous media at different temperature and pHs has been examined. The swelling, porosity and biocompatibility behavior of samples were investigated to check effects of polymer/polymer and polymer/drug interactions on these system characteristics. Obtained experimental results illustrates that with increasing crosslinking agent from 0.068 to 0.30, swelling of the prepared samples degrees from 1200% to 600% and pore diameters change from 100 to 500 µm. To investigate systems biocompatibility in gastric conditions, effects of crosslinker concentration on the pepsin enzyme activity have been studied using variation of relative viscosity of the system. Presented results also show that with increasing crosslinker agent concentration activity of enzyme reduces considerably and so crosslinker molar ratio to amine functional groups ...

154 citations

Journal ArticleDOI
TL;DR: In this article, the buckling characteristics of a curved functionally graded (FG) nanobeam based on nonlocal strain gradient elasticity theory accounting the stress for not only the nonlocal stress field but also the strain gradients stress field were investigated.

154 citations


Authors

Showing all 15352 results

NameH-indexPapersCitations
Ali Mohammadi106114954596
Mehdi Dehghan8387529225
Morteza Mahmoudi8333426229
Gaurav Sharma82124431482
Vladimir A. Rakov6745914918
Mohammad Reza Ganjali65103925238
Bahram Ramezanzadeh6235212946
Muhammad Sahimi6248117334
Niyaz Mohammad Mahmoodi6121810080
Amir A. Zadpoor6129411653
Mohammad Hossein Ahmadi6047711659
Goodarz Ahmadi6077817735
Maryam Kavousi5925822009
Keith W. Hipel5854314045
Danial Jahed Armaghani552128400
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202346
2022216
20212,493
20202,359
20192,368
20182,266