Paper Info
Title
A Spatial-Temporal QoS Prediction Approach for Time-aware Web Service Recommendation.
Abstract
Due to the popularity of service-oriented architectures for various distributed systems, an increasing number of Web services have been deployed all over the world. Recently, Web service recommendation became a hot research topic, one that aims to accurately predict the quality of functional satisfactory services for each end user. Generally, the performance of Web service changes over time due to variations of service status and network conditions. Instead of employing the conventional temporal models, we propose a novel spatial-temporal QoS prediction approach for time-aware Web service recommendation, where a sparse representation is employed to model QoS variations. Specifically, we make a zero-mean Laplace prior distribution assumption on the residuals of the QoS prediction, which corresponds to a Lasso regression problem. To effectively select the nearest neighbor for the sparse representation of temporal QoS values, the geo-location of web service is employed to reduce searching range while improving prediction accuracy. The extensive experimental results demonstrate that the proposed approach outperforms state-of-art methods with more than 10% improvement on the accuracy of temporal QoS prediction for time-aware Web service recommendation.
Year
DOI
Venue
2016
10.1145/2801164
TWEB
Keywords
Field
DocType
Design,Algorithms,Performance,Web service,service recommendation,QoS prediction,spatial-temporal QoS prediction
k-nearest neighbors algorithm,Data mining,End user,Computer science,Sparse approximation,Popularity,Lasso (statistics),Quality of service,Prior probability,Web service
Journal
Volume
Issue
ISSN
10
1
1559-1131
Citations 
PageRank 
References 
26
0.79
38
Authors
6
Name
Order
Citations
PageRank
xinyu159030.19
Jianke Zhu2170268.54
Zibin Zheng33731199.37
Wenjie Song4260.79
Yuanhong Shen5553.75
Michael R. Lyu610985529.03