Abbas Ghaffari

Dr. Abbas Ghaffari

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

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

Representative Publications

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15 October 2024 in Buildings
Verified
Journal Article
Open access
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AGAbbas Ghaffari
Abbas Ghaffari
YSYaser Shahbazi
Yaser Shahbazi
Mohsen mokhtari kashavarMohsen mokhtari kashavar
Mohsen mokhtari kashavar
MFMohammad Fotouhi
Mohammad Fotouhi
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
This study proposes a machine learning (ML) model to predict the displacement response of high-rise structures under various vertical and lateral loading conditions. The study combined finite element analysis (FEA), parametric modeling, and a multi-objective genetic algorithm to create a robust and diverse dataset of loading scenarios for developing a predictive ML model. The ML model was trained using a recurrent neural network (RNN) with Long Short-Term Memory (LSTM) layers. The developed model demonstrated high accuracy in predicting time series of vertical, lateral (X), and lateral (Y) displacements. The training and testing results showed Mean Squared Errors (MSE) of 0.1796 and 0.0033, respectively, with R2 values of 0.8416 and 0.9939. The model’s predictions differed by only 0.93% from the actual vertical displacement values and by 4.55% and 7.35% for lateral displacements in the Y and X directions, respectively. The results demonstrate the model’s high accuracy and generalization ability, making it a valuable tool for structural health monitoring (SHM) in high-rise buildings. This research highlights the potential of ML to provide real-time displacement predictions under various load conditions, offering practical applications for ensuring the structural integrity and safety of high-rise buildings, particularly in high-risk seismic areas.

4 May 2025 in Mathematics
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Journal Article
Open access
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YSYaser Shahbazi
Yaser Shahbazi
Mohsen mokhtari kashavarMohsen mokhtari kashavar
Mohsen mokhtari kashavar
AGAbbas Ghaffari
Abbas Ghaffari
MFMohammad Fotouhi
Mohammad Fotouhi
Siamak PedrammehrSiamak Pedrammehr
Siamak Pedrammehr
Modeling complex, non-stationary dynamics remains challenging for deterministic neural networks. We present the Chaos-Integrated Synaptic-Memory Network (CISMN), which embeds controlled chaos across four modules—Chaotic Memory Cells, Chaotic Plasticity Layers, Chaotic Synapse Layers, and a Chaotic Attention Mechanism—supplemented by a logistic-map learning-rate schedule. Rigorous stability analyses (Lyapunov exponents, boundedness proofs) and gradient-preservation guarantees underpin our design. In experiments, CISMN-1 on a synthetic acoustical regression dataset (541 samples, 22 features) achieved R2 = 0.791 and RMSE = 0.059, outpacing physics-informed and attention-augmented baselines. CISMN-4 on the PMLB sonar benchmark (208 samples, 60 bands) attained R2 = 0.424 and RMSE = 0.380, surpassing LSTM, memristive, and reservoir models. Across seven standard regression tasks with 5-fold cross-validation, CISMN led on diabetes (R2 = 0.483 ± 0.073) and excelled in high-dimensional, low-sample regimes. Ablations reveal a scalability–efficiency trade-off: lightweight variants train in 95% peak accuracy, while deeper configurations yield marginal gains. CISMN sustains gradient norms (~2300) versus LSTM collapse (<3), and fixed-seed protocols ensure <1.2% MAE variation. Interpretability remains challenging (feature-attribution entropy ≈ 2.58 bits), motivating future hybrid explanation methods. CISMN recasts chaos as a computational asset for robust, generalizable modeling across scientific, financial, and engineering domains.

1 July 2025 in Culture of Islamic Architecture and Urbanism
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Journal Article
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AMAida Maleki
Aida Maleki
ESElham Saligheh
Elham Saligheh
YSYaser Shahbazi
Yaser Shahbazi
AGAbbas Ghaffari
Abbas Ghaffari
Architectural design is a complex process in which multiple issues must be addressed simultaneously. The ratio of window area to floor area in classrooms, especially in cold regions, plays a significant role in enhancing both visual and thermal comfort, as it directly influences the amount of natural light and radiant heat entering ...

1 December 2022 in Journal of Research in Islamic Architecture
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Journal Article
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BSBita Shafaei
Bita Shafaei
AGAbbas Ghaffari
Abbas Ghaffari
MMMorteza Mirgholami
Morteza Mirgholami
In the present study, in order to explain the desirability of the soundscapes of the Timchehs of Tabriz Bazaar, Sound Pressure Level (SPL) and Reverberation Time (RT) have been measured as objective variables of acoustic behavior. Using descriptive questionnaire, subjective assessments were used to determine the quality of soundscape. The ...