Web Services Evaluation Model Based on Qualification of Time Utility
Yuxin Dong · 2012
Current evaluation methods of Web services do not consider the time-utility,while qualification of time-utility in other systems are hard to satisfy the requirements of distinction of decay of time utility.As a result,Web service eva-luation model based on qualification of time utility was proposed.Based on forgetting phenomenon of time utility,the model analyzes the relationship between time-utility and memory,unfolds regular of update of forgetting-ratio to time-utility,and designs method to qualify time utility concerned with the distinction of decay of time utility.Meanwhile,result of time utility is used to optimize calculation of length of evaluation widows,as to improve KNN in artificial setting of evaluation windows.Experiments shows that model meets the requirements of distinction of decay of time utility,achieves low evaluation error,reduces computational cost and fits users' evaluation,which is meaningful to theoretical research and practical use.