The rapid digitalisation process in power system has greatly benefited the large-scale integration of distributed energy resources (DERs), essentially accelerating the progress towards net zero. However, numerous cybe...
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The state-of-health of batteries is crucial for ensuring their optimal performance. This paper presents a novel multiscale attention recurrent network, which is designed to enhance the accuracy and efficiency of state...
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Emerging cyber-physical systems impel the development of advanced network scheduling schemes to utilize communication and computation resources efficiently. This paper investigates the event-based schedule for remote ...
ISBN:
(纸本)9798350301243
Emerging cyber-physical systems impel the development of advanced network scheduling schemes to utilize communication and computation resources efficiently. This paper investigates the event-based schedule for remote state estimation in networked controlsystems (NCSs) subject to delay and packet dropouts. The scheduler decides whether or not to send out a local estimate according to the Value of Information (VoI) metric, which measures the relative importance of an information update. In addition, we model the triggering intervals as a Markov chain and analyze the tradeoff between the estimation performance and communication cost under the proposed VoI-based scheduling for the first-order system.
In VANET, the efficiency of the RSUs positioned beside the roadways is crucial for both transportation and service provision. Direct communication between vehicles and infrastructure is supported by the network (V2V a...
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This brief proposes a novel approach to distributed moving horizon estimation for linear discrete-time systems over a wireless sensor network. A distributed moving horizon estimator is presented by minimizing a cost f...
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This brief proposes a novel approach to distributed moving horizon estimation for linear discrete-time systems over a wireless sensor network. A distributed moving horizon estimator is presented by minimizing a cost function involving consensus steps on the prediction. A matrix-weighted rule for the consensus steps is designed by combining an orthogonal matrix with a stochastic matrix, where the orthogonal matrix is obtained from the observability decomposition rule. The proposed estimator only requires that each node transmits one state vector over the network, which reduces the communication burden. The estimation error of the proposed estimator is bounded by choosing an appropriate scalar parameter and a sufficiently large consensus step. Finally, a distributed target tracking example is presented to verify the performance of the developed results.
Maritime operations are inherently distributed and involve systems and assets that are geographically dispersed across all domains of sea, land, air and space. Designing a communication relay network to support and fa...
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ISBN:
(纸本)9798350374247;9798350374230
Maritime operations are inherently distributed and involve systems and assets that are geographically dispersed across all domains of sea, land, air and space. Designing a communication relay network to support and facilitate mission command and control (C2) over large geographic areas is an important part of the mission planning and execution process to enhance the overall mission success of multi-domain maritime operations. In this paper, we study a topology design problem in which the C2 nodes located in different domains (land, ocean surface and underwater) are linked via a communication relay network. The objective of this research is to evaluate, characterize and perform a trade-off analysis on various relay network configurations consisting of underwater, surface, above-water and satellite nodes. We use a multiple-model approach in which packet-level network simulations are combined with network flow and queueing models to characterize the connectivity and traffic metrics of a given network topology configuration. We develop a custom simulation tool named TOMO-sim, which includes network configuration generation incorporating acoustic and radio frequency (RF) propagation models, discrete-event network simulation based on SimPy framework and wsnSimpy, and a global transmit scheduler to explore efficient transmission packing, to gather detailed simulation evaluations on configurations. network flow and queueing models provide additional insight into network connectivity and traffic flows under simplifying assumptions and are useful to perform sensitivity analysis. Our study demonstrates that adding assets, such as underwater nodes and gliders, only improves performance when they are well-placed according to the complex acoustic propagation environment.
To avoid worldwide climate change effects, decarbonization initiatives transit the distribution systems to be mixed with a high penetration of distributed energy resources (DERs) and enrichable battery energy storage ...
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ISBN:
(纸本)9798350375794;9798350375800
To avoid worldwide climate change effects, decarbonization initiatives transit the distribution systems to be mixed with a high penetration of distributed energy resources (DERs) and enrichable battery energy storage systems (BESS) units. Since the degradation of BESS units is highly relevant to their discharging/charging operations, this paper considers constructing the dynamic DNR model with the aging mitigation of BESS units. This can extend the reaming useful life of BESS units, whilst achieving the minimization loss and smoothing power fluctuations of DERs. For the BESS aging cost, we derive the linearized hyperplanes to approximately quantify the battery life loss, which facilities for the solvability of the dynamic DNR model as a mixed integer second-order conic programming (MISOCP) problem. Case studies demonstrate that this proposed dynamic DNR model can achieve these merits with satisfactory performance.
Spiking reinforcement learning (SRL) widely receives attention due to its ultra-low power consumption. Since it is hard to train SRL directly, converting Deep Neural network into Spiking Neural network (DNN2SNN) has b...
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ISBN:
(纸本)9789819755806;9789819755813
Spiking reinforcement learning (SRL) widely receives attention due to its ultra-low power consumption. Since it is hard to train SRL directly, converting Deep Neural network into Spiking Neural network (DNN2SNN) has been a commonly used method to train. However, the conversion error exists with deep reinforcement learning (DRL), resulting in performance degradation of SRL. Inspired by the success of calibrated conversion method in classification tasks, we introduce this method into SRL to further improve the performance of the converted SRL. Specifically, we calibrate the number of spikes fired by converted SNN policy through adjusting the initial membrane potential. Experimental results on MuJoCo robot control tasks demonstrate the effectiveness of Conversion + Calibration method in SRL.
Computer vision, which has been extensively used in intelligent monitoring, self-driving, medical assistance, sports analysis, and other fields, includes human pose estimation as a key component. Human pose estimation...
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The conformity of the quality with the desired specifications in production must be controlled quickly, reliably and accurately. Cost reduction and efficiency studies in production quality control stages are of great ...
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ISBN:
(纸本)9783031761966;9783031761973
The conformity of the quality with the desired specifications in production must be controlled quickly, reliably and accurately. Cost reduction and efficiency studies in production quality control stages are of great importance today. For this reason, non-human and intelligent automated systems are the main research subjects as a solution method in quality control stages. In this study, the final visual inspection of fastening elements of an industrial product is addressed. The inspection of connection elements, such as screws, as one of these quality control stages, is presented through a framework utilizing a camera and learnable neural network, replacing human-eye control. Fasteners can be counted as small objects in the images obtained. Therefore, in this study, object detectors based on different CNN backbones (ResNet 50-101) and proposals are discussed and their performance in detecting these small objects is compared to achieve the high detection speed, accuracy and reliability. To address the challenges at an industrial level for object detection methods, a non-processed image dataset has been created. This dataset aims to represent various lighting conditions, including dark-bright fields and diffuse reflection, as well as occlusion and restricted camera angles. During the training phase, hyperparameter-tuning optimization of deep networks such as YOLOv8, Faster-RCNN with ResNet50&101 and lastly Sparse-RCNN with a different set of learned object proposals is evaluated, which can be most suitable for the detection of screw connection. Experimental results show that the pretrained Faster-RCNN and Sparse RCNN has over the % 85 success rate of detection of small objects in an industrial environment.
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