Recently, Fuzzy Grey Cognitive Maps (FGCM) has been proposed as a Grey System theory-based FCM extension. Grey systems have become a very effective theory for solving problems within environments with high uncertainty, under discrete small and incomplete data sets. The benefits of FGCMs over conventional FCMs make evident the significance of developing a greyness-based cognitive model such as F...

Ab.l/fllel: An attempt is made in this note to investigate the effeet on edge extraction when the theory of HVS (human visual system) based thresholding [ll is made to operatc on the mtensity domain ofa grey tone image. A family of 5 and S-[ functions is considered to take eare of the grey level to intensity transformation. The performance of the system is also quantitatively ana­ lysed using t...

AbstractAiming at complexity and uncertainty of actual decision-making environment, this study proposes a multiple attribute decision-making model of grey target based on positive and negative bull’s-eye. Firstly, it defines that the optimal effect vector and the worst effect vector of grey target decision are respectively positive, negative bull’s-eye of the grey target; secondly, comprehensiv...

This paper presents a grey–fuzzy predictive controller that is based on fuzzy theory, grey prediction and on-line switching algorithms. The grey predictor is applied to extract key information and reduce the randomness of the measured non-stationary time-series signals from sensors, and send the prediction information to the fuzzy controller. The complete mathematical model is derived and the s...

The financial comprehensive appraisal method plays an essential role in decision-making for investors and reflecting real company’s financial comprehensive situation. Because of the grey characteristics of financial information, this paper constructs a grey relational model with a index system of financial comprehensive appraisal by grey relation theory. It is applied to listed companies in rea...

The openness of Android OS and the easy development of applications have attracted a large number of enthusiasts to join in. Due to the deficiencies of permission mechanism of Android OS, an Android privacy protection system called Protectedroid is presented in this paper which is a model based on grey list and enables the design of security strategies more easily. Protectedroid adds an enforci...