通信学报

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基于特征深度融合的Web服务QoS联合预测

  

Joint QoS Prediction for Web Services based on Deep Fusion of Features

摘要: 为了解决 Web服务 QoS预测准确度不够的问题,针对 QoS中隐藏的环境偏好信息和多类 QoS隐藏的共 同特征,提出一种基于深度融合的 Web服务 QoS联合预测方法。考虑 QoS数据可以建模为用户 -服务二部 图,采用多组件图卷积神经网络进行特征提取和映射,采用加权融合方法对多类 QoS特征进行同维映射。使用注意力因子分解机对映射后的特征向量进行一阶特征、二阶交互特征和高阶交互特征的提取,并结合各部分结果实现 QoS联合预测。实验结果表明,所提出的方法在均方根误差和平均绝对误差方面优于现有 QoS预测方法。

关键词: 联合预测, 服务质量 , 偏好特征深度融合

Abstract: In order to solve the problem of insufficient accuracy of Web service QoS prediction, a joint QoS prediction method for Web services based on the deep fusion of features is proposed with considering of the hidden environmental preference information in QoS and the common features of multi-class QoS. First, QoS data is modeled as a user-service bipartite graph; then, multi-component graph convolution neural network is used for feature extraction and mapping, and the weighted fusion method is used for the same dimensional mapping of multi-class of QoS features. Subsequently, the attention factor decomposition machine is used to extract the first-order features, second-order interactive features, and high-order interactive features of the mapped feature vector. Finally, the results of each part are combined to achieve the joint QoS prediction. The experimental results show that the proposed method is superior to the existing QoS prediction methods in terms of root mean square error (RMSE) and average absolute error (MAE).

Key words: Joint Prediction, Quality of Service, Preference Feature, Deep Fusion

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