supplier selection is one of the critical activities for firms to gain competitive advantage and achieve the objectives of the whole supply chain. in this paper based on a dea-topsis method for madm problems a flexible strategy for supplier selection is introduced

Objective: Multiple sclerosis (MS) has several physical, psychological, and psychiatric symptoms. Regarding the psychological impact of MS on aspects of life, this study sought to examine the effect of group quality of life therapy on depression and anxiety in these patients. Methods: Two groups of 15 matched patients with MS were randomly assigned to experimental and control groups after co...

Abstract: Discriminant analysis for multiple groups is often done using Fisher’s rule, and can be used to classify observations into different populations. In this paper, we measure the performance of classical and robust Fisher discriminant analysis using the Error Rate as a performance criterion. We were able to derive an expression for the optimal error rate in the situation of three groups....

What is factorial invariance? When conducting multiple-group confirmatory factor analysis, one should establish factorial invariance. If a researcher establishes factorial invariance, then he or she is measuring the same construct across groups or across time. Factorial invariance is assumed when making a comparison between groups or between time points. When doing multiple-group confirmatory f...

Traditional approaches for studying consumer behavior, such as marketing survey and focus group, require a large amount of time and resources. Moreover, some products, such as smartphones, have a short product life cycle. As an alternative solution, we propose a system, the Micro-blog Sentiment Analysis System (MSAS), based on sentiment analysis to automatically analyze customer opinions from t...