processingneuralnetwork inferences on edge devices, such as smartphones, IoT devices and smart sensors can provide substantial advantages compared to traditional cloud-based computation. These include technical aspe...
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Road network representation learning aims to learn compressed and effective vectorized representations for road segments that are applicable to numerous tasks. In this paper, we identify the limitations of existing me...
The Hopfield neuron is an artificial neuron model used for pattern memorization and recognition. It exhibits a complex dynamic with stable states corresponding to memorized patterns. In order to grasp a more complete ...
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The Hopfield neuron is an artificial neuron model used for pattern memorization and recognition. It exhibits a complex dynamic with stable states corresponding to memorized patterns. In order to grasp a more complete representation of the information exchange between two neurons, emphasizing the importance of neuronal connections in brain processing, we propose in this work the coupling of two fractional-order Hopfield neurons via a fractional-order flux-controlled multistable memristor. Each of these two neurons incorporates a selfcoupling memristive component, called an autapse memristor. Additionally, the second neuron is subjected to an external electromagnetic radiation, simulated by an additional memristor. The I-V characteristics of the memristors integrated in this model are analyzed through numerical simulations. The simulations of model dynamics versus its diverse parameters have revealed rich and complex dynamical behaviors. These simulations demonstrate that the proposed model generates a variety of homogeneous and heterogeneous chaotic attractors, distributed at diverse locations. The elaborated memristor coupled fractional-order bi-Hopfield neuron MCFBHN model is implemented on an Arduino-Due platform. A comparison of the results of the two approaches shows good consistency.
The deployment of machine learning algorithms on edge devices is challenging due to the required low power consumption and high computing power. Neuromorphic systems operate in a parallel and distributed way, with mul...
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ISBN:
(纸本)9798350386301;9798350386318
The deployment of machine learning algorithms on edge devices is challenging due to the required low power consumption and high computing power. Neuromorphic systems operate in a parallel and distributed way, with multiple processing elements that mimic or simulate biological neurons on silicon. This approach is promising in equipping sensors with alwayson signal processing capabilities, naturally executing spiking neuralnetwork algorithms on dedicated hardware. Analog silicon neurons exhibit the lowest energy per spike, but are traditionally implemented in planar technology processes. In order to increase their density, hence the computing power, in the same area, it is essential to explore implementations in more scaled technology nodes. In this work an analog two-variable spiking neuron is described and implemented in 16 nm FinFET, adopting a supply voltage of 400 mV and employing transistors in the subthreshold region to reduce power consumption. Transient simulations for the regular spiking and fast spiking patterns are reported, showing the accelerated timescale at which the spiking neuron operates, with 38 mu s and 7 mu s time interval between two consecutive spikes respectively. With a required energy per spike of 117.5 fJ for the regular spiking configuration and the possibility of tuning external voltage references to modify the resulting spiking pattern, the presented circuit is suitable for developing large-scale neuromorphic architectures.
This paper investigates the hybrid impulsive control synchronization problem of multi-term fractional-order neuralnetworks (MFNNs) with switching parameters. Firstly, a novel MFNN with switching parameters model is i...
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This paper investigates the hybrid impulsive control synchronization problem of multi-term fractional-order neuralnetworks (MFNNs) with switching parameters. Firstly, a novel MFNN with switching parameters model is introduced by incorporating multi-term Caputo fractional-order derivative to extend the existing framework for fractional-order cases. Then, the relationship between multi-term fractional-order derivative and distributed-order derivative is analyzed, and a synchronization criterion for a class of multi-term fractional-order impulsive switched systems is derived by utilizing the properties of the distributed-order derivative weight function. Furthermore, a hybrid impulsive controller is designed to obtain sufficient conditions for synchronization of MFNNs with switching parameters. To validate the effectiveness of the obtained conclusions, a numerical example is presented to demonstrate the validity of the proposed MFNN model and synchronization criterion. Copyright (C) 2024 The Authors. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0/)
The popularity of mmWave in 5G and future communications is hindered by challenging propagation environments, such as line-of-sight obstruction. Reconfigurable intelligent surfaces (RIS) address this issue by dynamica...
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ISBN:
(纸本)9798350344820;9798350344813
The popularity of mmWave in 5G and future communications is hindered by challenging propagation environments, such as line-of-sight obstruction. Reconfigurable intelligent surfaces (RIS) address this issue by dynamically modifying wireless channels, thereby enhancing data rates, reducing latency, and improving reliability in non-line-of-sight scenarios. For high data-rate communication and precise mobile user localization, a large RIS is required, resulting in a high pilot overhead for channel estimation. To address this issue, we exploit a semi-passive RIS with sparsely distributed active RIS elements in lieu of fully passive RIS. This approach efficiently enables channel estimation both between the base station and the RIS as well as between the RIS and the mobile users. Structured covariance matrix interpolation optimally utilizes the array aperture from the sparsely placed active RIS elements. Recognizing the need for frequent channel estimation, we introduce a recurrent neuralnetwork-based model for sequential channel prediction, resulting in a significant reduction of the required training pilot signals. Simulation results affirm the capability and effectiveness of the proposed approach to enhance data transmission.
In multi-label text classification, the numbers of instances in different categories are usually extremely imbalanced. How to learn good models from imbalanced data is a challenging task. Some existing works tackle it...
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ISBN:
(纸本)9783031301100;9783031301117
In multi-label text classification, the numbers of instances in different categories are usually extremely imbalanced. How to learn good models from imbalanced data is a challenging task. Some existing works tackle it through class re-balancing strategies or imbalanced loss objectives, but their performance remains limited in the cases of imbalanced distributed data. In this work, we propose a model, which combined Siamese network and Bilateral-Branch network to deal with both representation learning and classifier learning simultaneously. In the siamese network component, we propose a category-specific similarity strategy to improve the representation learning and adapt a novelty dynamic learning mechanism to make the model end-to-end trainable, and in the bilateral-branch network, we adopt the cumulative learning strategy to shift the learning focus from universal pattern to tail learning. In general, we adopt a multi-task architecture to ensure that both the head categories and the tail categories are adequately trained. The experiments on two benchmark datasets show that our method can improve the performance on the entire and tail categories, and achieves competitive performance compared with existing approaches.
Artificial neuralnetworks are powerful global approximators for mineral grade assessment. The techniques are capable of retaining nonlinearity and spatial heterogeneity of a feature variable and can even perform mode...
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Artificial neuralnetworks are powerful global approximators for mineral grade assessment. The techniques are capable of retaining nonlinearity and spatial heterogeneity of a feature variable and can even perform modelling with noisy and incomplete data. These qualifiers make neuralnetworks strong contenders for mineral grade assessment. In the present research, the authors have proposed a hybrid model consisting of two unsupervised models, namely ordinary kriging (OK) and k-means clustering, used as pre-processing steps to feed data to supervised generalized regression neuralnetwork (GRNN) model. While OK models the spatial variability and provides estimation on local scale, k-means clustering has been used for dimensionality reduction. These steps support in achieving accuracy and speed of the modelling process. GRNN model prepares its training and validation datasets using the k-clusters. Testing and validation of the model have been carried out on five live iron-ore deposits. Once the validation is found adequate and acceptable generalization with validation dataset is achieved, the model is verified with testing dataset. Deposit-wise value of R-2 of the hybrid GRNN model has been found to vary between 0.93 and 0.99. The model is observed to deliver improved performance when compared with multi-layer perceptron, radial basis function and recurrent neuralnetwork models. Spatially distributed estimation maps generated retain nonlinearity and spatial heterogeneity of the original Fe data values. Thus, the hybrid GRNN model provides an edge over the standalone classical geostatistics or standalone GRNN model.
Model data-driven ontology and knowledge presentation for evolving semantic Asian social networks (OKASN) is a critical strategy for web of things (WoT) services. Meanwhile, Deep neuralnetwork (DNN)-based OK-ASN serv...
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Model data-driven ontology and knowledge presentation for evolving semantic Asian social networks (OKASN) is a critical strategy for web of things (WoT) services. Meanwhile, Deep neuralnetwork (DNN)-based OK-ASN service in WoT is growing rapidly. However, most DNN-based services cannot utilize the potential of WoT fully, as heterogeneity exists in WoT. Therefore, this article proposes a novel framework called Webbased HeterogeneousHierarchical distributedDeepneuralnetwork (WH2D2N2) to deploy the DNNs forOKASN services on WoT, overcoming the heterogeneity. The architecture of the system and the designed EdgeCloud-Joint execute scheme utilize heterogeneous devices to make DNN inference ubiquitous and output two types of results to meet various requirements. To bring robustness to OK-ASN services, a global scheduling is designed to arrange the workflow dynamically. The results of our experiments prove the efficiency of the execute scheme and the global scheduling in the system.
The development of the Internet of Vehicles (IoV) has significantly enhanced connectivity and cooperation among road entities, leading to a more efficient, economical, and safer intelligent transportation system (ITS)...
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The development of the Internet of Vehicles (IoV) has significantly enhanced connectivity and cooperation among road entities, leading to a more efficient, economical, and safer intelligent transportation system (ITS). However, this increased connectivity also exposes vehicles to a growing risk of cybersecurity threats through intravehicle and intervehicle networks. To secure IoV networks, many studies have focused on using intrusion detection systems (IDSs) based on deep learning methods to effectively detect cyber-attacks due to their ability to learn from large-scale data. Nonetheless, most existing IDSs rely on expert knowledge to manually design features, resulting in difficulties adapting to evolving attacks and information loss. To mitigate these limitations, this article presents a tokenization representation and attention mechanism-based convolutional neuralnetwork-bidirectional long short-term memory (CNN-BiLSTM) intrusion detection method. For feature extraction, we tokenize original traffic using natural language processing technique to represent discrete hexadecimal bytes as words, thus alleviating the need for manual feature design and allowing for the direct extraction of sequence patterns. For classification, we incorporate an attention mechanism into the CNN and BiLSTM architectures to enhance the accuracy of intrusion detection by focusing on critical information and capturing sequential patterns. The effectiveness of the proposed IDS is evaluated in both intravehicle and intervehicle network scenarios. Experimental results show that our method can detect various types of attacks with 100% accuracy on the Car-Hacking data set for the intravehicle network scenario. In the intervehicle network scenario utilizing the CICIoT2023 data set, our approach also achieves a high accuracy of 98%, outperforming existing methods.
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