AI, Machine Learning and Optimization

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "E: Applied Mathematics".

Deadline for manuscript submissions: 31 January 2026 | Viewed by 973

Special Issue Editors

Faculty of Information and Communication Technology, Department of Computer Information Systems, University of Malta, MSD 2080 Msida, Malta
Interests: AI; machine learning; natural language processing; Voynich manuscript
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Artificial intelligence (AI), machine learning (ML), and optimization techniques have revolutionized numerous fields in recent years, from healthcare and finance to manufacturing and transportation. The rapid advancement in computational capabilities has enabled increasingly complex AI and ML models, which in turn rely on sophisticated optimization methods to achieve their performance. Simultaneously, AI and ML approaches have enhanced traditional optimization techniques, leading to novel hybrid methods capable of efficiently finding high-quality solutions to computationally intractable problems and accelerating optimization processes for complex real-world applications.

This Special Issue on "AI, Machine Learning and Optimization" aims to bring together researchers and practitioners working at the intersection of these fields to share recent developments, innovative applications, and emerging trends. The interplay between AI, ML, and optimization presents rich opportunities for interdisciplinary research that can address pressing challenges across various domains. We welcome original research articles, comprehensive reviews, and case studies that showcase theoretical advances, algorithmic innovations, or novel applications in these areas.

Topics to be covered include the following:

  • Deep learning architectures and optimization techniques.
  • Reinforcement learning algorithms and applications.
  • Metaheuristic and nature-inspired optimization methods.
  • Explainable AI and interpretable machine learning models.
  • Optimization methods for training neural networks.
  • Multi-objective and constrained optimization.
  • Evolutionary computation and genetic algorithms.
  • Bayesian optimization and probabilistic methods.
  • Graph neural networks and combinatorial optimization.
  • Transfer learning and domain adaptation techniques.
  • Time series forecasting and prediction models.
  • AI and ML applications in operations research.
  • Optimization under uncertainty and robust methods.
  • Transformer models.
  • Natural Language Processing.
  • Approximation of NP-hard problems.
  • Neural Architecture Search (NAS).
  • Algorithm selection and configuration

Dr. John Abela
Prof. Dr. Wanquan Liu
Guest Editors

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Keywords

  • artificial intelligence
  • machine learning
  • deep learning
  • optimization algorithms
  • meta-heuristics
  • neural networks
  • reinforcement learning
  • evolutionary computation
  • Bayesian optimization
  • mathematical programming
  • combinatorial optimization
  • constraint satisfaction
  • federated learning
  • meta-heuristics
  • stochastic optimization
  • explainable AI
  • autonomous systems
  • cognitive computing
  • algorithm discovery
  • neural architecture search

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Published Papers (2 papers)

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Research

16 pages, 1620 KB  
Article
An Attention-Driven Hybrid Deep Network for Short-Term Electricity Load Forecasting in Smart Grid
by Jinxing Wang, Sihui Xue, Liang Lin, Benying Tan and Huakun Huang
Mathematics 2025, 13(19), 3091; https://doi.org/10.3390/math13193091 - 26 Sep 2025
Viewed by 369
Abstract
With the large-scale development of smart grids and the integration of renewable energy, the operational complexity and load volatility of power systems have increased significantly, placing higher demands on the accuracy and timeliness of electricity load forecasting. However, existing methods struggle to capture [...] Read more.
With the large-scale development of smart grids and the integration of renewable energy, the operational complexity and load volatility of power systems have increased significantly, placing higher demands on the accuracy and timeliness of electricity load forecasting. However, existing methods struggle to capture the nonlinear and volatile characteristics of load sequences, often exhibiting insufficient fitting and poor generalization in peak and abrupt change scenarios. To address these challenges, this paper proposes a deep learning model named CGA-LoadNet, which integrates a one-dimensional convolutional neural network (1D-CNN), gated recurrent units (GRUs), and a self-attention mechanism. The model is capable of simultaneously extracting local temporal features and long-term dependencies. To validate its effectiveness, we conducted experiments on a publicly available electricity load dataset. The experimental results demonstrate that CGA-LoadNet significantly outperforms baseline models, achieving the best performance on key metrics with an R2 of 0.993, RMSE of 18.44, MAE of 13.94, and MAPE of 1.72, thereby confirming the effectiveness and practical potential of its architectural design. Overall, CGA-LoadNet more accurately fits actual load curves, particularly in complex regions, such as load peaks and abrupt changes, providing an efficient and robust solution for short-term load forecasting in smart grid scenarios. Full article
(This article belongs to the Special Issue AI, Machine Learning and Optimization)
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20 pages, 2051 KB  
Article
A Study on the Evolution of Online Public Opinion During Major Public Health Emergencies Based on Deep Learning
by Yimin Yang, Julin Wang and Ming Liu
Mathematics 2025, 13(18), 3021; https://doi.org/10.3390/math13183021 - 18 Sep 2025
Viewed by 351
Abstract
This study investigates the evolution of online public opinion during the COVID-19 pandemic by integrating topic mining with sentiment analysis. To overcome the limitations of traditional short-text models and improve the accuracy of sentiment detection, we propose a novel hybrid framework that combines [...] Read more.
This study investigates the evolution of online public opinion during the COVID-19 pandemic by integrating topic mining with sentiment analysis. To overcome the limitations of traditional short-text models and improve the accuracy of sentiment detection, we propose a novel hybrid framework that combines a GloVe-enhanced Biterm Topic Model (BTM) for semantic-aware topic clustering with a RoBERTa-TextCNN architecture for deep, context-rich sentiment classification. The framework is specifically designed to capture both the global semantic relationships of words and the dynamic contextual nuances of social media discourse. Using a large-scale corpus of more than 550,000 Weibo posts, we conducted comprehensive experiments to evaluate the model’s effectiveness. The proposed approach achieved an accuracy of 92.45%, significantly outperforming baseline transformer-based baseline representative of advanced contextual embedding models across multiple evaluation metrics, including precision, recall, F1-score, and AUC. These results confirm the robustness and stability of the hybrid design and demonstrate its advantages in balancing precision and recall. Beyond methodological validation, the empirical analysis provides important insights into the dynamics of online public discourse. User engagement is found to be highest for the topics directly tied to daily life, with discussions about quarantine conditions alone accounting for 42.6% of total discourse. Moreover, public sentiment proves to be highly volatile and event-driven; for example, the announcement of Wuhan’s reopening produced an 11% surge in positive sentiment, reflecting a collective emotional uplift at a major turning point of the pandemic. Taken together, these findings demonstrate that online discourse evolves in close connection with both societal conditions and government interventions. The proposed topic–sentiment analysis framework not only advances methodological research in text mining and sentiment analysis, but also has the potential to serve as a practical tool for real-time monitoring online opinion. By capturing the fluctuations of public sentiment and identifying emerging themes, this study aims to provide insights that could inform policymaking by suggesting strategies to guide emotional contagion, strengthen crisis communication, and promote constructive public debate during health emergencies. Full article
(This article belongs to the Special Issue AI, Machine Learning and Optimization)
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