Study On Group Information Aggregation Method Based On The Satisfaction Degree Of Evaluative Information And Its Application

With the rapid development of science and technology and a sharp increase in knowledge and information,so that the individual evaluator is difficult to give an accurate evaluation results,therefore,in order to make the evaluation results more objective and reasonable and improve the quality and credibility of evaluation results,more evaluators or groups often need to participate in the same evaluation activity,this will constitute the group evaluation.Study on aggregation theory of group information is the important part of group evaluation,research results have been fruitful,but we still need to develop and perfect them.Group information aggregation theory as an important part of information aggregation theory needs to be further enriched and improved.After concluding and summarizing the domestic and foreign literatures,this paper does further research on evaluator weight and applying it to the process of determining evaluator risk,the main works are as follows:(1)The calculation method of evaluator weight is designed based on experience information of evaluator,and the calculation method of evaluation information satisfaction degree is designed.(2)Correcting and decomposing evaluator weights that are determined by experience information based on every evaluator's overall cognitive degree of evaluation indexes and evaluated objections,and on this basis put forward a group information aggregation method based on experience information of evaluators.This method has changed the previous research in weights are fixed.(3)Evaluator weights are determined from three aspects,the overall cognitive degree of evaluation indexes and evaluated objections,and the cognitive degree of each element in evaluation information.On this basis put forward a group information aggregation method based on the satisfaction degree of evaluation information.This method can solve the problem of evaluator weights can not be determined by experience information.(4)Aimed at the problem of choosing different evaluators bring different risks can not be considering in group evaluation,given a group evaluation method by considering evaluators' risks.This method abandons evaluators' risk attitudes investigated in previous studies and does not require gathering the evaluation results of evaluators.This method fully-considered the risk factors of evaluators and used the solver to get the final group evaluation results which aimed to investigate the method of group evaluation from the theoretical level.At last,this dissertation summarizes group information aggregation method based on the satisfaction degree of evaluative information and point some questions,which are worth to do further research.