...Yanli Zhai; Gege Luo; Dang Luo Purpose The purpose of this paper is to construct a grey incidence model for panel data that can reflect the incidence direction and degree between indicators. Design/methodology/approach Firstly, this paper introduces the concept of a negative matrix...

... for panel data. With the increasing popularity of artificial intelligence, scholars are gradually introducing it into water environment quality assessment. In response to the low efficiency and rationality of traditional automatic monitoring in water quality evaluation, Song et al. (2021...

... is introduced to represent the complete information of relevant data. The industrial ecological evaluation involves a comprehensive complex system, which belongs to the panel data analysis problem. The improved grey panel clustering evaluation model is applied to grade the industrial ecological development...

...Dang Luo; Nana Zhai Purpose The purpose of this paper is to establish a two-stage grey cloud clustering model under the panel data for the multi-attribute clustering problem with three-parameter interval grey number to evaluation of agricultural drought resistance grade of 18 cities in Henan...

... relational method of spatial-temporal panel data from the perspective of the development trend of the object dimension indicators and the performance difference between the time dimension indicators. Design/methodology/approach From the different perspectives of object dimension and time dimension...

...Honghua Wu; Zhongfeng Qu Purpose The paper aims to propose a clustering model for panel data. More specifically, the paper aims to construct a gray incidence model for panel data to solve the classification with multi-factors and multi-attributes. Design/methodology/approach The paper opted...

... model based on cone volume and other methods so as to evaluate the logistics development of node cities. The dimensionality of three-dimensional panel data is reduced by factor analysis at first. Then, the gray target decision-making method based on cone volume is adopted to evaluate the development...