Analysis Of Auto Brand Public Opinion Based On Consumer Reviews

With the rapid development of modern information technology and the Internet,a large amount of public opinion information has been generated.Using public opinion analysis to discover useful information and values has received increasing attention.The methodology of public opinion analysis will be applied to business areas such as car sales.From the comments on the various car brands of consumers,consumer's main concern for the car brand is found and furthermore the advantages and disadvantages of different car brands are analyzed.The study is divided into two phases,namely data acquisition phase and data analysis phase.At the data acquisition stage,we first review a variety of web crawler technologies.Then the comments related to the car brand in forums,Weibo and other public opinion sites are crawled down by these technologies.The texts to be analyzed are compared with the collected words,and different types of reviews are grouped into structured tables.In addition,the text information is segmented by the Chinese word segmentation technique,which based on the maximum probability method and the Hidden Markov Model,and the frequency of the words is calculated.According to sentiment classification algorithm based on sentiment dictionary,consumers' comments are divided into positive appraisal,negative appraisal and neutral appraisal,and the frequency of three appraisals of each brand is counted.At the data analysis stage,firstly,by means of principal component analysis and according to the proportion of positive evaluation of each brand car dimension,the car of each car brand is divided into three aspects to evaluate.A conclusion that is consistent with the reality is drawn,and some explanation is given.It has certain reference value for consumers who want to buy a car.And then,we explore the important strength of different positive evaluation aspects on the sales volume of car brands.Taking the correlation between the different dimensions of positive evaluations on car into consideration,we use the relative weight method to overcome the correlation problem and finally come to a more convincing result.It has some guidance value for the car brand manufacturers to adjust their focus on improving the car.Finally,we point out some possible deficiencies in the study and further issues that need to be considered.