Unmanned Aerial Vehicles (UAVs) find extensive applications across various industries, surveillance, and communication services. However, concerns regarding their potential misuse have prompted the development of coun...
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ISBN:
(纸本)9798350369458;9798350369441
Unmanned Aerial Vehicles (UAVs) find extensive applications across various industries, surveillance, and communication services. However, concerns regarding their potential misuse have prompted the development of counter-drone measures. In this paper, we propose a counter-UAV approach centered on radio frequency (RF) signal sensing. Upon the detection of an RF signal, our system employs a Short-Time Fourier Transform (STFT)-based spectrogram (SP) generation process. this SP is further refined through adaptive windowing and logarithmic tuning to extract multi-intensity features. To classify the complex RF time-domain signals and STFT spectrograms, we utilize two deep learning classifiers: RF-Network and SP-Network, facilitating a multi-class classification process by using deep neural networks (DNN). To enhance the overall accuracy of our model, we leverage an ensemble neural network (EN-Net) by combining predictions from the RF-Network and SP-Network classifiers. Fusing data from a single sensor in both time and frequency domains enhances DNN accuracy by providing complementary information, improving robustness, and reducing overfitting, resulting in increased model performance and a deep understanding of the data. Our results demonstrate a notable improvement in accuracy-specifically, a 36% increase for multi-class models when compared to single-class models. this proves the effectiveness of our EN-Net model in addressing security threats posed by UAVs through advanced RF signal analysis and classification.
Withthe increasing integration of distributed energy resources (DERs) into power grids, the security of distributed power dispatching control systems becomes a critical concern. this paper presents a comprehensive se...
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this thesis aims to explore the optimization strategies of distributed algorithms in cloud computing environment. Withthe rapid development of cloud computing, traditional distributed algorithms face many challenges,...
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ISBN:
(纸本)9798331528911;9798331528928
this thesis aims to explore the optimization strategies of distributed algorithms in cloud computing environment. Withthe rapid development of cloud computing, traditional distributed algorithms face many challenges, such as network latency, resource scheduling and data consistency. By analyzing the limitations of existing algorithms, scheduling strategies based on resource optimization, algorithm adaptation schemes in heterogeneous environments, and load balancing techniques are proposed. the study shows that these optimization strategies can significantly improve the performance and scalability of the algorithms, providing a theoretical basis and practical guidance for future cloud computing applications.
Withthe continuous advancement of large-scale models and expanding volumes of data, a single acceleration hardware is no longer sufficient to meet the training demands. Simply stacking multiple acceleration hardware ...
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Against the backdrop of the rapid development of unmanned aerial vehicle (UAV) technology, onboard visual navigation systems have become the core support technology for achieving precise positioning and efficient map ...
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the growing volume and complexity of unstructured and semi-structured data pose a significant challenge in extracting meaningful and relevant information. Information Extraction (IE) emerges as a powerful technique to...
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Current IaaS providers have deployed data centers worldwide, with resources continually increasing. Meanwhile, there is a rising trend in the concurrency of user requests and the diversity of user request types. To ac...
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ISBN:
(纸本)9798350368543;9798350368536
Current IaaS providers have deployed data centers worldwide, with resources continually increasing. Meanwhile, there is a rising trend in the concurrency of user requests and the diversity of user request types. To achieve better resource allocation, various complex scheduling architectures have been proposed. However, due to the challenges associated with real-world experiments, simulation systems are needed to build experimental environments for related research. As existing systems do not perform well enough, we construct LGDCloudSim. It is designed with full consideration of the characteristics of the largescale geographically distributed cloud data center scenarios. To support large-scale simulations, we propose state management optimization and operation process optimization methods. Experiments show that LGDCloudSim can simulate up to 5x10(8) hosts and 107 request concurrency. It also supports diverse scheduling architectures and different request types.
An increasingly prominent issue in recent times is the utilization of the Internet of things (IoT) for home automation systems. Home automation, also known as smart home technology, refers to the wireless and intellig...
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the large-scale grid connection of distributed energy resources is an effective way to solve the problems of power supply shortage and environmental pollution, and there is no unified standard for the communication pr...
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Traditional farming methods are becoming incapable of keeping up with global population growth. As a result, innovative farming ideas are desperately necessary to meet the food needs of a growing population. Intellige...
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