...Rafał Mierzwiak; Marcin Nowak; Naiming Xie Purpose The degree of greyness may be regarded as a measure of cognitive uncertainty. Therefore, it is a part of the epistemological core of the grey systems theory. The theoretical importance of the degree of greyness concept is also due to its...

...Lili Qian; Sifeng Liu; Zhigeng Fang Purpose The purpose of this paper is to advance a new grey risky multi-attribute decision-making (RMADM) method from the perspective of regret aversion, which is based on the general grey numbers (GGNs) taking the form of kernel and degree of greyness. Design...

... and 1. Kernel Grey number Interval grey number General grey number Degree of greyness Simplified form Synthesis axiom Operation rules Such a number instead of its range whose exact value is unknown is referred to as a grey number. Grey number is the basic “unit” or “cell” of grey...