The following content, is highlighted in the book: general grey numbers and their operations, grey incidence
models based on similarity and closeness, three-dimensional degree of grey incidence models, grey evaluation models based on centre-point mixed possibility functions, grey evaluation models based on endpoint mixed possibility functions, original difference grey model (ODGM), even difference grey model (EDGM), multi-attribute intelligent grey target decision models, weight vector group of kernel clustering, and the weighted coefficient vector of kernel clustering for decision-making.