Abstract
Web services are the mainstream implementation of service-oriented architectures in which both functional and non-functional Quality of Service (QoS) is significantly considered by service users and providers. Although multiple QoS-based models to QoS prediction for Web services via collaborative filtering have been proposed, the accuracy of existing ones is not adequate, since these works rarely have considered the influence of asymmetric correlation among service users on prediction accuracy. This paper combines asymmetric correlation among service users and asymmetric correlation propagation into the deviation computation of different service items in QoS prediction. In this paper, a novel method for QoS prediction in dynamic Web services is proposed, which includes a framework consisting of asymmetric correlation model, asymmetric correlation propagation model and deviation computation algorithm with correlation. To study the QoS prediction performance of our method, a well-known dataset consisting of about 1.97 million real-world QoS records is used in the experiments. The experimental results demonstrate that our method achieves better prediction accuracy than other well-known methods.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China under Grant No. 61502401 and No. 61379019, Guangdong Natural Science Foundation (Project No. 2014A030313151).
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Xie, Q., Tang, B., Zheng, Z., Cui, M. (2015). QoS Prediction in Dynamic Web Services with Asymmetric Correlation. In: Wang, G., Zomaya, A., Martinez, G., Li, K. (eds) Algorithms and Architectures for Parallel Processing. ICA3PP 2015. Lecture Notes in Computer Science(), vol 9528. Springer, Cham. https://doi.org/10.1007/978-3-319-27119-4_31
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