Recently, Deep Reinforcement Learning (DRL) methods have become increasingly common in voltage control problems of power distribution systems. However, existing DRL methods either lack a theoretical guarantee of volta...
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ISBN:
(纸本)9798350373707;9798350373691
Recently, Deep Reinforcement Learning (DRL) methods have become increasingly common in voltage control problems of power distribution systems. However, existing DRL methods either lack a theoretical guarantee of voltage stability or cannot maintain their optimality when the network topology changes. This paper proposes a DRL algorithm based on Multi-Agent Twin Delayed Deep Deterministic Policy Gradient (MATD3) framework, Flexible-MATD3, which can maintain the system stability and optimality even when the topology and impedance parameters change. We proposed a partial monotonic neural network to constrain the policy search space of our DRL algorithm so that our policy can always guarantee safety. In addition, the experimental results show that Flexible-MATD3 achieves better performance than the baseline controllers for different network topologies and line impedance parameters without retraining the neural network.
The concept of SDN (Software-Defined networking) originally came with the purpose of disaggregating control plane and data plane. However, current scope of SDN has surpassed the original goal. It sets out to introduce...
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ISBN:
(数字)9783031585616
ISBN:
(纸本)9783031585609;9783031585616
The concept of SDN (Software-Defined networking) originally came with the purpose of disaggregating control plane and data plane. However, current scope of SDN has surpassed the original goal. It sets out to introduce programmability in the control plane for better visibility and manageability of networking devices. The idea has been recently extended to program the data plane. In the present scenario P4 (Programming Protocol-Independent Packet Processors) stands as the de-facto language to program the data plane. In this study, we implemented an L2 (Layer 2) switch and evaluated it performance using P4 programming language. The performance of the switch was evaluated in terms of throughput (Mbps) and latency (ms). The throughput was found to be nominal as the switch was implemented in software and the latency for first packet was also high since the switch's table was empty. However, once the table was filled, subsequent packets suffered very low latency.
This article aims to develop an aviation maintenance training simulator, and has designed an efficient maintenance simulator. Firstly, the development architecture of the system was described in detail, and the tool c...
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This work presents a new controller for gridconnected PV/Battery systems that combines a bidirectional battery controller with a voltage source converter (VSC) to solve problems caused by power fluctuations on the DC-...
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The scheduling of real-time and dependent tasks on multicore systems plays an important role in influencing system performance. During the scheduling process, multiple constraints should be taken into account, e.g., t...
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ISBN:
(纸本)9798350387780;9798350387797
The scheduling of real-time and dependent tasks on multicore systems plays an important role in influencing system performance. During the scheduling process, multiple constraints should be taken into account, e.g., task dependency, real-time response, and energy efficiency. The complex task scheduling problem makes it difficult to balance solution quality and computation time. Existing works either use time-consuming methods to find optimal solutions or get feasible solutions through heuristic methods. In this paper, we propose a GAT (graph attention network)-based deep reinforcement learning (DRL) algorithm to solve task scheduling problems. This method combines the benefits of deep learning (DL) networks and reinforcement learning (RL) algorithms. It can achieve adaptive learning and adjust information features by constructing the GAT to model the dependencies between tasks. At the same time, we use the soft actor-critic (SAC) algorithm to optimize the task scheduling policy to minimize the makespan of scheduling results. The experimental results show that our method outperforms other scheduling methods regarding scheduling efficiency (the quality of task scheduling problem) and algorithm running time.
While existing image de-raining methods have obtained satisfactory performance, lacking theoretical basis prevents them from further improvement. In this brief, we propose an efficient image de-raining network empower...
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While existing image de-raining methods have obtained satisfactory performance, lacking theoretical basis prevents them from further improvement. In this brief, we propose an efficient image de-raining network empowered by control theory to address this issue. To the best of our knowledge, it is the first attempt to integrate the control theory into image de-raining model design. Different from previous methods that roughly construct complicated neural networks, our method is theoretical and provides a new perspective for model design. Specifically, by mimicking the signal processing flow of state observable and controllable standard form, we expand them to two network modules, named C-IM and O-IM with every component in the module one-to-one corresponding to each operation involved in state equation. Equipped with C-IM and O-IM, our proposed network could efficiently explore and exploit the features of rain streaks in a recursive fashion. Extensive experiments demonstrate that control theory equipped method is capable of obtaining promising performance and speeding up the model training.
To address the limitations of traditional intrusion detection systems that do not conform to the physical laws governing actual industrial processes, we propose a frequency domain simplified Dual-Physical-Informationa...
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This study explores the creation of lightweight neural network architectures specifically designed for mobile devices. The main focus is on MobileNet, but we also examine other models like ShuffleNet, SqueezeNet, Effi...
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ISBN:
(纸本)9783031770425;9783031770432
This study explores the creation of lightweight neural network architectures specifically designed for mobile devices. The main focus is on MobileNet, but we also examine other models like ShuffleNet, SqueezeNet, EfficientNet, MnasNet, and NASNet Mobile. The main challenge is to carefully evaluate these models to find the best balance between simplicity, accuracy, and efficiency, considering the diverse needs of mobile applications. We assess important metrics such as simplicity, accuracy, and efficiency within these architectures. The main goal is to provide guidance to practitioners in choosing the most suitable architecture. We offer insights into the trade-offs and advantages of each model through both quantitative and qualitative assessments. We consider factors like computational resources, accuracy requirements, and processing speed. The findings of this research provide valuable insights for practitioners who want to make informed decisions about the best neural network architecture for mobile devices. This guidance is tailored to their specific computational limitations and application requirements, helping them make strategic decisions in this specialized field.
Load control and cost optimization are considered to be crucial in tri-generation or combined cooling, heating, and power (CCHP) systems. In this study, an inventive CCHP system employs an FC system as its first mover...
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Load control and cost optimization are considered to be crucial in tri-generation or combined cooling, heating, and power (CCHP) systems. In this study, an inventive CCHP system employs an FC system as its first mover and includes a heat exchanger, a heat recovery, as well as an auxiliary boiler, an electric chiller, and an absorption chiller. The electrical grid is linked to this system. The idea here is to maximize the system's performance from a financial perspective and to make the annual expenditure of the system minimum over a 20-year period that is considered as the cycle life-span. It is a multi-objective optimization problem which is optimized using a newly introduced metaheuristic optimization method and a Fractional-order future search optimizer. The findings of this study are used to divine an ideal configuration of the CCHP. Finally, to demonstrate the higher efficiency of the suggested method, a comparison should be conducted among the optimization results of the fractional-order-based future search algorithm, the results of Non-dominated Sorting Genetic Algorithm ii (NSGA-ii), and standard future search algorithms in previous studies. Based on the results presented, the proposed Fractional-order Future Search Algorithm (FOFSA) was able to optimize the performance of a PEMFC-based CCHP system more effectively than conventional methods. The system's exergy efficiency was found to decrease from 52% at 793 mA/cm2 current density to 36% at 1000 mA/cm2 current density. However, with the application of FOFSA, the suggested optimal system had a higher exergy efficiency of 41.6% and a yearly cost of $2765, resulting in the maximum annual greenhouse gas (GHG) reduction of 4.48E6 g. Therefore, in summary, the proposed FOFSA yielded an optimized CCHP system configuration that had higher energy efficiency, lower annual cost, and reduced GHG emissions. These findings highlight the effectiveness of the FOFSA method in optimizing the performance of PEMFC-based CCHP s
LiDAR plays a critical role in autonomous car perception. Hence, the robustness of LiDAR data is imperative. However, malfunctions resulting from sensor cover contaminants are unavoidable and can lead to erroneous dat...
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ISBN:
(纸本)9798400705977
LiDAR plays a critical role in autonomous car perception. Hence, the robustness of LiDAR data is imperative. However, malfunctions resulting from sensor cover contaminants are unavoidable and can lead to erroneous data that slowly degrade performance. As such, detecting contamination in LiDAR is essential but remains an open challenge due to varying contaminant types, changing properties over time, and deployment aspects. Automatic classification of the contaminants would enable the automated response (like cleaning the sensor) to ensure the integrity of the data collected by the LiDAR sensor. To minimize the effect on the whole vehicle perception system, the contamination classification has to be performed near the sensor and in a computationally efficient way. To address these challenges, we have conducted a feasibility study of developing an efficient near-sensor machine learning-powered contaminant classification running on the RISC-V architecture. This paper proposes a lightweight 2D CNN network, TinyLid, trained to classify contaminants based on the most comprehensive LiDAR contaminant dataset. The results presented in this paper show that the proposed solution can achieve high classification performance while being computationally efficient and running on hardware with negligible power consumption compared to the LiDAR sensor itself. Specifically, implementing a proposed ML model on a reference RISC-V architecture GAP8 achieves the inference time of 2.575 milliseconds, 6.138 operations/cycle, and uses only 6.8% of 512 KiB L2 memory. The results presented in this work showcase the possibility of increasing the reliability and integrity of the LiDAR-collected sensor data without significant computational or energy consumption impact on the broader system.
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