Improved service discovery method

It is a challenge problem to discovery right target service from large scale service library quickly and precisely. Based on two shortcomings existed in current service discovery method. This paper improves the performance of service discovery through importing the concept of virtual operation set, which is composed of virtual operations. Virtual operation is specific operation which has only one output parameter and its related input parameter set. Experiments result shows the recall rate and precision of service discovery method are improved through importing of virtual operation.