The report provides an overview of the dataset and the models and algorithms applied in the project. Initially, we present a comprehensive review of the RFM model and clustering algorithms. Utilizing the online transa...
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In wind farm projects, the investment cost of the collection system is high, and optimizing the topological structure of the collection system can save a significant amount of cost. This paper addresses the optimizati...
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The technology was vulnerable to online hackers and assaults on the open and dispersed nature of the cloud. To recognize and stop both internal and external attacks in a cloud ecosystem with high identification accura...
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Identifying Urban Functional Regions (UFR) can achieve the rational aggregation of social resource space, realize urban economic and social functions, promote the deployment of urban infrastructure, radiate and drive ...
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ISBN:
(数字)9789811983313
ISBN:
(纸本)9789811983306;9789811983313
Identifying Urban Functional Regions (UFR) can achieve the rational aggregation of social resource space, realize urban economic and social functions, promote the deployment of urban infrastructure, radiate and drive the development of surrounding regions, so the identification of urban functional regions can promote the efficient development of cities. However, the traditional functional region identification method is mainly based on remote sensing mapping, which relies more on the natural geographical characteristics of the region to describe and identify the region, while the urban functional region is closely related to human activities, and the traditional functional region identification results are not ideal. Social data includes a series of data that reflect people's activities and behaviors, such as trajectory data, social media data, and travel data, thus the analysis of social data can more effectively solve the difficulties of traditional mapping and identification. POI (Point of Interest) data, as a typical type of social data, can be used to identify urban functional regions. We apply the LDA topic model to the POI data, and propose a new urban functional region identification method, which makes full use of the POI data to reflect the activity categories of urban populations to characterize the features of regional functions and achieve a high degree of identification of urban functional regions. Through experimental verification on real data, the experimental results show that the proposed method can more accurately identify urban functions, which proves the method reliable.
Mobile edge computing can expand the limited computing power of on-board equipment, which is an effective means to assist vehicles to realize complex applications. However, the task offloading process brings a certain...
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In this paper, the k-means, k-medoids, fuzzy c-means, Density-Based Spatial clustering of Applications with Noise (DBSCAN), Ordering Points To Identify the clustering Structure (OPTICS), and hierarchical clustering al...
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In this paper, the k-means, k-medoids, fuzzy c-means, Density-Based Spatial clustering of Applications with Noise (DBSCAN), Ordering Points To Identify the clustering Structure (OPTICS), and hierarchical clustering algorithms (with the addition of the elbow method) are examined for the purpose of Automatic Modulation Classification (AMC). This study compares these algorithms in terms of classification accuracy and execution time for either estimating the modulation order, determining centroid locations, or both. The best performing algorithms are combined to provide a simple AMC method which is then evaluated in an Additive White Gaussian Noise (AWGN) channel with M-Quadrature Amplitude Modulation (QAM) and M-Phase Shift Keying (PSK). Such an AMC method does not rely on any thresholds to be set by a human or machine learning algorithm, resulting in a highly flexible system. The proposed method can be configured to not give false positives, making it suitable for applications such as spectrum monitoring and regulatory enforcement. (C) 2020 Published by Elsevier Ltd.
A Vehicular Ad Hoc Network is a dynamic network due to uncertain vehicles presence on the road and data transmission among vehicles and Road Side Unit (RSU). Efficient communication among the vehicles and RSUs is usef...
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ISBN:
(纸本)9781665414937
A Vehicular Ad Hoc Network is a dynamic network due to uncertain vehicles presence on the road and data transmission among vehicles and Road Side Unit (RSU). Efficient communication among the vehicles and RSUs is useful for the Intelligent Transportation System (ITS). There are two types of communication Vehicle 2 Vehicle (V2V), and Vehicle 2 Infrastructure (V2I) performs in VANET by mobile ad hoc technology. The communication performance of the VANET depends on the routing data. The routing protocols play an important role in efficient data routing in VANET. VANET routing protocols are reviewed, and clustering in VANET is introduced in this study. An extensive survey is carried out on various benchmark clustering algorithms designed by different researchers for Cluster Head (CH) selection. Various parameters for evaluating the performance in a network are compared and analyzed. Also, we introduce our proposed algorithm which aims to increase the reliability of VANET routing.
With the increase in the number of relay nodes in large-scale underwater acoustic sensor networks (UWA-SNs), the learning costs of routing protocols based on reinforcement learning algorithms continue to increase. In ...
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ISBN:
(纸本)9781665439442
With the increase in the number of relay nodes in large-scale underwater acoustic sensor networks (UWA-SNs), the learning costs of routing protocols based on reinforcement learning algorithms continue to increase. In this paper, we take the Q-learning (QL) algorithm as the example of the reinforcement learning algorithm, combined with the clustering algorithm based on genetic simulated annealing algorithm (SAGAFCM), and propose an improved QL routing protocol (IQLR) aimed at reducing the time complexity of QL-based routing algorithm. The core idea is to preprocess the underwater relay nodes before applying the traditional QL algorithm for routing optimization. The simulation results show that compared with the un-preprocessed/traditional QL routing algorithm (UQLR), the proposed IQLR can greatly reduce the time cost of the QL-based routing algorithm while ensuring that the transmission quality does not change much.
K-Nets is a deterministic clustering algorithm based on the network structure. It can automatically detect the symmetric structure in the data and can be used to process clusters of different sizes, shapes or a specif...
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ISBN:
(纸本)9781665416580
K-Nets is a deterministic clustering algorithm based on the network structure. It can automatically detect the symmetric structure in the data and can be used to process clusters of different sizes, shapes or a specific number. However, K-Nets has the following shortcomings: (1) the clustering result is more sensitive to the manually input parameter K, so the accuracy will be affected;(2) the algorithm only considers the average distance of K-nearest neighbors, which may lead to some wrong distribution center points in the dataset with large density difference or the same score values during calculation;(3) it does not consider the privacy leakage during the clustering process. To solve the above problems, we propose a differential privacy protection method in adaptive K-Nets clustering, called ADP-K-Nets. Firstly, for reducing the influence of the parameters on the result, the natural eigenvalues are adaptively obtained through the characteristic of the natural neighbors and used as parameter values to find data points. Then we define a new method for calculating the score, which can solve the problem of incorrectly selecting cluster centers when there are large density differences or conflicts in the calculation process. Also, the Laplace noise is added in calculating the local density of every data point to protect data privacy. Experimental results show that our method ensures the performance of clustering compared with some existing algorithms.
In the paper, according to the original data and the value of the sensor at different moments, the box diagram method is used to process the data, and divides the normal value and outliers. The two types of outliers w...
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ISBN:
(数字)9781665486651
ISBN:
(纸本)9781665486651
In the paper, according to the original data and the value of the sensor at different moments, the box diagram method is used to process the data, and divides the normal value and outliers. The two types of outliers were distinguished based on the persistence of the outliers in the longitudinal time of the data and the linkage of the lateral sensors, and the clustering algorithm was used to reclassify the data. Then, persistence and linkage were calculated within each class, dividing the sum of persistence and linkage by the result of the maximum number of possible anomalies as the risk coefficient, and then defining a threshold to distinguish between risk-specific and non-risk anomalies. Later, a comprehensive evaluation model of anomaly degree was established through quantitative score, principal component analysis and 0,1 planning. Finally, this quantitative evaluation method is evaluated objectively.
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