Research And Implementation Of Online Service Evaluation Method Based On Slater Social Choice Theory

In recent years,with the rapid development and progress of the Internet,the number and types of online services based on the Internet have increased significantly.At present,online services have been rapidly popularized and widely used in some fields,such as online ordering,e-commerce,online shopping,online recruitment,and online learning.In the process of using online services,influenced by different consumer psychology,consumption background and other factors,consumers have different preferences and evaluation criteria,thus the consumers could not evaluate different services quality.In order to help users quickly choose the online service that meets the requirements.And an objective online service evaluation method,which must guarantee the authenticity and reliability of its results,is needed to solve this problemAiming at the problems above,this paper proposes an online service evaluation method based on Slater's social selection theory,which evaluates the online service according to the scores that users give about the services,and this will help users select online services that meet their needs.The general idea of the Slater method is: Firstly,fill in the sparse scoring matrix with collaborative filtering algorithm to make the complete data;Secondly,calculate individuals' preference to the online service according to the score matrix to obtain a service-service evaluation matrix;Then,the service priority queue list is obtained according to the service-service evaluation matrix,and construct a directed graph with the service as the node and the priority relationship as the directed edge according to the service priority queue list;Finally,the order of the online services is obtained according to the directed graph,which is that to find similar set,front-set and later-set according to their r respective definitions,their relationship among the three,the relationship among the internal nodes of the three sets,and the order of the nodes,that is the order of the services.And the order of the online services is got in the end.In the thesis,both the theory and related comparison experiments proof show that the evaluation results obtained with the Slater method satisfy the pore multiplicity,monotonicity,anti-symmetry and anti-manipulation complexity,and the reliability of the method is verified.According to demand analysis,based on the Slater method in this paper,the prototype system is designed and implemented,and the properties of multi-plug,monotonicity and anti-manipulation are verified.And the evaluation results of the online service are presented to the user in a visual way,which can quickly help the user choose an online service that suits them.