High-Frequency Trading (HFT) algorithms are automated feedback systems that interact with markets to maximize investment returns. These systems can process varying resolutions of market information at any given time, ...
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Real-time networks and Software-Defined networking (SDN) play pivotal roles in contemporary communication systems, supporting applications such as video conferencing, online gaming, VoIP calls, virtual reality (VR) sy...
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ISBN:
(纸本)9798350380903;9798350380910
Real-time networks and Software-Defined networking (SDN) play pivotal roles in contemporary communication systems, supporting applications such as video conferencing, online gaming, VoIP calls, virtual reality (VR) systems, and Industry 4.0 automation. These applications necessitate low and predictable latency for real-time interactivity, responsiveness, and uninterrupted performance. Achieving low and predictable latency in dynamic network environments is challenging, as factors like changing network topology, traffic load, and connected devices impact latency. Furthermore, network protocols and devices introduce additional delays. SDN provides a solution by allowing dynamic control of communication paths, enhancing the performance of time-sensitive applications. This paper addresses the crucial task of evaluating latency in real-time networks. We propose a novel measurement methodology that effortlessly evaluates latency by utilizing Time-Sensitive networking (TSN) features and tools embedded in the Linux kernel. Our methodology accurately captures network latency irrespective of workload, configuration, and computational capabilities.
In this study, we propose an innovative control algorithm leveraging an improved biological neural network for submarine cable target search tasks. This algorithm models the seafloor as a grid map, utilizing the neura...
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In this study, we propose an innovative control algorithm leveraging an improved biological neural network for submarine cable target search tasks. This algorithm models the seafloor as a grid map, utilizing the neural network for simulation. Then a collaborative mechanism is designed to control the cooperative detection of multiple AUVs, which is able to avoid obstacles and cover the whole area to find the mission target, effectively improving the mission efficiency. The simulation results show that the proposed algorithm is able to search the submarine mission area with the presence of cables quickly and efficiently. The robustness and effectiveness of the cooperative mechanism are also verified, which can provide support for subsequent missions such as target striking.
The service-based architecture (SBA) of 5G Core (5GC) introduces significant landscape changes to the modern communication and network system, and the network slicing enables different network Functions (NFs) to meet ...
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ISBN:
(纸本)9781665476409
The service-based architecture (SBA) of 5G Core (5GC) introduces significant landscape changes to the modern communication and network system, and the network slicing enables different network Functions (NFs) to meet diverse service requirements. However, with the broadening interface, some key NFs may become more vulnerable to internal hostile NFs or external malicious entities, which pose severe threats to the control-plane components in the 5GC network (5GCN). In this paper, we propose ADSeq-5GCN, a network-level anomaly detection framework based on modeling network traffic sequences. Our framework focuses on the control plane of 5GCN, where the network traffic is captured and analyzed for anomalies. We use a sequence model, Bidirectional Long Short Terms Memory (Bi-LSTM) networks, to learn normal NF-to-NF interactions and detect anomalies based on incorrect service event prediction. We evaluate our proposed framework on a 5GCN testbed with Free5GC and UERANSIM under various scenarios. Our results demonstrate the overwhelming performance of our proposed framework over the baseline models.
This paper addresses the output tracking problem of networkcontrolsystems (NCSs) with random communication constraints, especially when the lower bound of the time delay induced by random communication constraints i...
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ISBN:
(纸本)9798331540845;9789887581598
This paper addresses the output tracking problem of networkcontrolsystems (NCSs) with random communication constraints, especially when the lower bound of the time delay induced by random communication constraints is relatively large. Firstly, the output tracking problem is converted into the stabilization problem of an augmented system. Then, a networked predictive output tracking control scheme with time-varying control gains is proposed to compensate for the impact of the communication constraints so as to complete the desired output tracking performance under the large time delays. And, a set of control gains are calculated for each different time delay, which improves the adaptability of NCSs to time delays. Next, a sufficient condition is derived to keep the system stability. Finally, the effectiveness of the proposed method is verified by numerical simulations.
Nowadays, industrial controlsystems are falling squarely under the Industry 4.0 dominant trends and technological challengers. In this, the problems associated with data, their processing and analysis happen to be pa...
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Neural networks have gained prominence in controlsystems due to their ability to approximate complex nonlinear mappings and adapt to uncertain environments. The model predictive control (MPC) problem for a quadcopter...
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In order to improve the data rate received at the user's end,Reconfigurable Intelligent Surface (RIS),an artificial material that can control electromagnetic wave characteristics,can reshape the wireless channel. ...
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ISBN:
(纸本)9798350350227;9798350350210
In order to improve the data rate received at the user's end,Reconfigurable Intelligent Surface (RIS),an artificial material that can control electromagnetic wave characteristics,can reshape the wireless channel. This allows it to be built in millimeter-wave non-line-of-sight links that are obscured by obstacles. This paper combines a long-short-term memory (LSTM) network with depth-deterministic policy gradient (DDPG),taking into account the fact that imperfect channel state information (CSI) can also result in a degradation of communication system performance. By using the LSTM neural network's memory function to control data delivery,the combined approach optimizes both the RIS reflective phase shift and the base station transmitting beam-forming matrix in an undesirable environment. The simulation findings demonstrate that,in comparison to the current deep reinforcement learning algorithms,the LSTM-DDPG algorithm can offer customers more stable and efficient data rates.
Information disclosure is a potential challenge in the practical implement of distributed algorithm and wireless communications on islanded AC microgrid (MG) for better flexibility and low cost. It can be solved by th...
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Information disclosure is a potential challenge in the practical implement of distributed algorithm and wireless communications on islanded AC microgrid (MG) for better flexibility and low cost. It can be solved by the initial-value-around and real-time-values privacy preservations against internal curious distributed generations (DGs) and external cyber attackers respectively. However, three problems should be solved before the existing information privacy-preserving mechanisms implemented on control level: (i) Encryption algorithm for real-time-values privacy will exacerbate the delay problem;(ii) When the delay problem is solved by the existing distributed model predictive controls, the decaying disturbance for initial-value-around privacy will impact the stability of islanded AC MG;(iii) The compromise problem between the privacy-preserving performance and transient performance of distributed model-predictive control (DMPC) is unacceptable. For the above problems, this paper proposes a parameter-adaptive DMPC (PA-DMPC), where two decaying functions are designed to adjust parameters in terminal constraints and optimal cost function for the third problem. The optimal control results are obtained by solving time-varying quadratic programming (QP) problem. The real-time simulation platform based on NI-PXI (National Instruments-PCI eXtensions for Instrumentation) and Wireless Local Area network (WLAN) is built to validate its effectiveness and advantages.
This study focuses on the dual-objective optimization problem of Sensor-Weapon-Target Assignment (SWTA), aiming to minimize the expected threat values of incoming targets during combat while considering the minimal co...
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ISBN:
(纸本)9798350366907;9789887581581
This study focuses on the dual-objective optimization problem of Sensor-Weapon-Target Assignment (SWTA), aiming to minimize the expected threat values of incoming targets during combat while considering the minimal consumption of resources for effective resource allocation. We propose an innovative solution based on the Hopfield neural network by transforming the optimization model of the problem and introducing the energy function of the Hopfield neural network, which linearly combines the two optimization objectives. The states of the neural network correspond to the final allocation matrix, and by randomly adjusting weights, the neural network can converge to different solutions, ultimately obtaining the Pareto front. We designed scenarios for both small and large-scale cases in various combat situations and compared this method with traditional algorithms GA and PSO. The comparison algorithms also use linearly weighted objectives to solve the Pareto front. Experimental results indicate that in most cases, the Hopfield neural network demonstrates superior performance, achieving high-quality solutions at a lower time cost. Compared to traditional GA and PSO algorithms, it exhibits outstanding effectiveness in solving the SWTA problem. This research provides an advanced and reliable approach for military combat decision-making and offers valuable insights for the future development of intelligent systems.
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