| In recent years,the rapid development of Internet has made the scale of online services grow significantly,covering Internet search engines,news portals,e-commerce,Web services,online travel and other fields.Therefore,users can be more and more convenient to use online services to meet their needs.However,because more and more service providers provide users with services on the Internet,the number and category of online services have increased dramatically,and many online services with similar functions have appeared.In addition,because of the influence of market competition,the service provided by the service providers can not be ensured objectively and practically,which causes users to search and compare repeatedly,and waste a lot of time in choosing the most suitable online services for their needs.Therefore,an objective and effective online service evaluation method to measure the relationship between different online services and help users to choose online services more quickly is becoming more and more important.Different users have different psychology and preferences when interacting with online services,causing different users to have different criteria for evaluation preference.Some users attach importance to the quality of online services,and some users attach importance to interactive experience when interacting with online services.Therefore,some users tend to give an overall evaluation of higher online services,some users tend to give lower overall evaluation of online services,the same service online because the user evaluation criteria inconsistent with different ratings,leading to different users for the same service score does not have the comparability of the fair.Therefore,the traditional service evaluation method is simply aggregated without a comparable service score,and the result of service evaluation is difficult to truly reflect the good and bad relationship between services.To evaluate the different users of online services have different evaluation criteria,resulting in users of the online service score does not have the comparative issues to be fair,the text puts forward a Ranked Pairs social choice online service evaluation function method based on the method according to the online service users preference rather than the traditional evaluation score calculation results online service.First get each user to online service according to user service rating matrix preference relation;then based on most criteria to determine the service priority,and according to the relationship of service priority service list;finally constructed to serve as a directed acyclic graph of nodes,and in the search for an optimal path contains all acyclic service in the picture,the path to rally all users get to the online service,the service overall preference preference sequence,and then calculate all evaluation service according to the online service preference sequence,and the evaluation values are sorted so as to get the evaluation results of online services.Theoretical analysis and experimental data based on actual data sets show that the method is more reasonable and effective when the user evaluation criteria are inconsistent. |
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