Siamak Pedrammehr

Dr. Siamak Pedrammehr

Tabriz Islamic Arts University, Tabrīz, Āz̄arbāyjān-e Sharqī, Iran
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orcid
Man know thyself; then thou shalt know the universe and God

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 March 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
MKMahdieh Taiyeb Khosroshahi
Mahdieh Taiyeb Khosroshahi
SMSoroush Morsali
Soroush Morsali
SGSohrab Gharakhanlou
Sohrab Gharakhanlou
AAAlireza Motamedi Alanagh
Alireza Motamedi Alanagh
SHSaeid Hassanbaghlou
Saeid Hassanbaghlou
Ali JafarizadehAli Jafarizadeh
Ali Jafarizadeh
Alzheimer’s disease (AD) remains a significant global health challenge, affecting millions worldwide and imposing substantial burdens on healthcare systems. Advances in artificial intelligence (AI), particularly in deep learning and machine learning, have revolutionized neuroimaging-based AD diagnosis. However, the complexity and lack of interpretability of these models limit their clinical applicability. Explainable Artificial Intelligence (XAI) addresses this challenge by providing insights into model decision-making, enhancing transparency, and fostering trust in AI-driven diagnostics. This review explores the role of XAI in AD neuroimaging, highlighting key techniques such as SHAP, LIME, Grad-CAM, and Layer-wise Relevance Propagation (LRP). We examine their applications in identifying critical biomarkers, tracking disease progression, and distinguishing AD stages using various imaging modalities, including MRI and PET. Additionally, we discuss current challenges, including dataset limitations, regulatory concerns, and standardization issues, and propose future research directions to improve XAI’s integration into clinical practice. By bridging the gap between AI and clinical interpretability, XAI holds the potential to refine AD diagnostics, personalize treatment strategies, and advance neuroimaging-based research.
3

31 May 2012 in The International Journal of Advanced Manufacturing Technology
Verified
Journal Article
Closed access
PDF file
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
MMMehran Mahboubkhah
Mehran Mahboubkhah
NKNavid Khani
Navid Khani

29 March 2012 in Journal of Mechanical Science and Technology
Verified
Journal Article
Closed access
PDF file
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
MMMehran Mahboubkhah
Mehran Mahboubkhah
NKNavid Khani
Navid Khani

29 April 2014 in Robotica
Verified
Journal Article
Closed access
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MQMohammad Reza Chalak Qazani
Mohammad Reza Chalak Qazani
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
ARArash Rahmani
Arash Rahmani
BDBehzad Danaei
Behzad Danaei
MEMir Mohammad Ettefagh
Mir Mohammad Ettefagh
HAHamid Abdi
Hamid Abdi
SUMMARY: Parallel mechanisms possess several advantages such as the possibilities for high acceleration and high accuracy positioning of the end effector. However, most of the proposed parallel manipulators suffer from a limited workspace. In this paper, a novel 6-DOF parallel manipulator with coaxial actuated arms is introduced. Since parallel mechanisms have more workspace limitations compared to that of serial mechanisms, determination of the workspace in parallel manipulators is of the utmost importance. For finding position, angular velocity, and acceleration, in this paper, inverse and forward kinematics of the mechanism are studied and after presenting the workspace limitations, workspace analysis of the hexarot manipulator is performed by using MATLAB software. Next, using the obtained cloud of points from simulation, the overall borders of the workspace are illustrated. Finally, it is shown that this manipulator has the important benefits of combining a large positional workspace in relation to its footprint with a sizable range of platform rotations.

1 February 2019
Verified
Conference Paper
Closed access
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
MQMohammad Reza Chalak Qazani
Mohammad Reza Chalak Qazani
HAHoushyar Asadi
Houshyar Asadi
SNSaeid Nahavandi
Saeid Nahavandi
Hexarot is a popular member of the axisymmetric parallel mechanisms family. One of the challenges in hexarot manipulators is to analyze their manipulability. In this paper, the kinematics of hexarot mechanisms is addressed. The manipulating ability of hexarot mechanism in positioning and orienting of the end effector is investigated. The manipulability of hexarot mechanism is formulated and illustrated within the different sections of the mechanism workspace using the kinematic formulation and manipulability index relations.

11 April 2018 in International Journal of Precision Engineering and Manufacturing
Verified
Journal Article
Closed access
PDF file
Mohammad Reza Chalak QazaniMohammad Reza Chalak Qazani
Mohammad Reza Chalak Qazani
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
MNMohammad Javad Nategh
Mohammad Javad Nategh