Design And Implementation Of Personalized Health Information Service System

In recent years,the number of patients with chronic diseases in China has increased year by year.If people pay attention to disease prevention and daily health care,they can reduce the incidence of chronic diseases.Therefore,the acquisition and storage of health information becomes particularly important.The health information service system provides an effective way for people to obtain health information.However,with the rapid development of the Internet,the traditional health information platform can no longer meet the diverse needs of people.User-oriented health information service is urgently needed.Based on this,this paper proposes to build a personalized health information service system.This paper studies and test the recommendation algorithm of personalized health information service system.Traditional collaborative filtering recommendation algorithms have the problems of sparse data and low recommendation accuracy,and information recommendation algorithms seldom consider social relationships.So this paper proposes a hybrid recommendation algorithm based on social network and user similarity(SNUS-HyRA).Firstly,user's nearest neighbor trust is calculated based on social network relationship;then,Terms Frequency-Inverse User Frequency(TF-IUF)and time weight are innovatively combined to calculate user's similarity to supplement the nearest neighbor;finally,the nearest neighbor is the main method,and the recommendation results are supplemented by content-based recommendation algorithm.The algorithm is validated on delicious public dataset.Compared with user-based collaborative filtering algorithm and item-based collaborative filtering algorithm based on label,the experimental results show that the proposed algorithm improves the accuracy of recommendation and alleviates the problem of data sparsity to a certain extent.According to the software engineering standard process,this paper designs and implements the personalized health information service system combined with SNUS-HyRA,and describes the process of requirement analysis,system design,system implementation and testing in detail.