فهرست مطالب اکرم بیگی

Air travel has significantly grown as a fast and safe means of transportation. Therefore, creating a smooth air traffic and proper flight scheduling for safe landings with minimal time changes is necessary to avoid wasting time and money. In most studies, the aircraft landing scheduling problem has been considered a static issue. However, this challenge has a dynamic nature in real-world problems. One of the optimizing approaches in this scope is swarm intelligence optimization algorithms, which are simple and highly capable in solving optimization problems. Among these algorithms, Spider-Monkey optimization algorithm is more efficient than traditional algorithms by using few parameters, maintaining search history, controlling searches, and grouping members of the population if needed. In this study, an active scheduling method for aircraft landing scheduling using Spider-Monkey optimization algorithm and genetic algorithm has been presented. The proposed method is examined by some datasets of single and multi-runways (single and multi-objective aircraft landing). The achieved results show an improvement in flight schedules and reduced costs.

In the world of digital communication, authentication is an important concern and the need for a safe and secure system increases the necessity of designing authentication systems. To perform authentication, biometric-based approaches are of great interest due to the property of being alive and resistant to forgery. In this study, an authentication system based on heart signal is designed. Due to the process of receiving heart signals, their data usually has a lot of noise. In order to prepare the data, in the proposed system, the heart signals are first cleaned and then transferred to the frequency domain for feature extraction. Also, they are converted into an image by applying the Wigner-Ville distribution, so that each image contains the signal information of each person’s heart and is unique. In the proposed authentication system, these images are used for training and evaluation in a deep convolutional neural network. The output of this system provides the possibility of people’s identification. The data of this study are taken from the NSRDB and MITDB databases, and significant results have been obtained compared to previous studies.

Managing energy consumption in smart buildings has become an increasingly important challenge. Efficient energy management can have a positive impact on both micro and macroeconomics. Moreover, it is essential to ensure that the comfort of smart building residents is maintained at an acceptable level. Optimization algorithms can be used to achieve user convenience while minimizing energy consumption. In this study, we propose an optimization approach that utilizes an agent-based architecture. This architecture comprises intelligent agents that communicate with each other via message exchange in a network structure consisting of three layers: (1) The switch layer monitors user preferences and comfort levels. (2) The coordination layer includes a coordinating agent that determines the optimal timing for electrical appliances to minimize electricity consumption costs and maximize user comfort. (3) The execution layer contains performer agents. Our focus in this research is on the coordination layer with the aim of reducing energy consumption costs and peak average rates, while increasing user comfort to the highest possible level. However, this optimization problem is highly complex due to the large number of electrical devices and their capabilities. To address this, we propose a hybrid method based on genetic and bat algorithms. We evaluated its performance based on objective functions and compared it with recent research on SmartHome and CU-Bems datasets. Our results demonstrate an improvement in performance

The electricity smart grid market is complex and dynamic. Brokers, which mediate the sale of electrical power between retailers and wholesalers, are widely used in new markets for smart grids. Due to the complexity and distribution properties of the market in smart grid networks, multi-agent systems are appropriate to solve its problems. In these approaches, we have autonomous agents exchanging information with other agents all 24 hours of a day. These agents encounter major challenges including diverse consumption patterns of consumers, price changing according to consumption patterns, and the amount of electricity consumed during the day. In this paper our goal is to increase profit in the electricity grid market while modeling the components of the electricity market with multi-agent systems. In the proposed method, we first process the customer diversity using a sequential clustering method suitable for time series data. Then, for each cluster, we apply an active policy reinforcement learning algorithm named Actor-Critic reinforcement learning. Finally, we evaluate the impact of the reward shaping on the profit earnings and we offer an hourly tariff for each cluster according to their respective consumption time

Challenges in the field of information and communication security are of great interest to researchers. The expansion of network boundaries, the intensification and complexity increase of network security attacks, has amplified the need for intelligent, automated and real-time systems to detect network anomalies and threats. To detect anomalies, network traffic needs to be monitored immediately. The anomaly involves significant and unusual changes in network traffic behavior compared to its normal behavior patterns. In this paper, in order to detect anomalies, a system based on self-organizing multi agent systems is presented. Multi agent systems are made up of agents that interact with each other to achieve a specific goal. These systems are used to solve problems that are difficult for a single agent to solve or integrate. The proposed system architecture is scalable and can adapt to changes in today's networks. The evaluation and analysis of the proposed system in the NSL-KDD dataset shows that the rate of anomalies detection has improved compared to the recently proposed methods. Also, by proposing an algorithm to optimize the agents’ choices and another one for intelligent agents’ decision weighting, the rate of anomaly detection is increased and the time of event analysis is reduced.