Grey Systems: Theory and Application: Volume 12 Issue 1

Drought grade assessment method based on grey cloud incidence clustering model

Dang Luo, Yan Hu, Decai Sun

The purpose of this paper is to establish a grey cloud incidence clustering model to assess the drought disaster degree under 15 indexes in 18 cities of Henan province.

Grey clustering of the variations in the back-to-front airplane boarding method considering COVID-19 flying restrictions

Camelia Delcea, Liviu-Adrian Cotfas, R. John Milne, Naiming Xie, Rafał Mierzwiak

The airline industry has been significantly hit by the occurrence of the new coronavirus SARS-CoV-2, facing one of its worst crises in history. In this context, the present paper…

Development of a direct NGM(1,1) prediction model based on interval grey numbers

Ye Li, Yuanping Ding, Yaqian Jing, Sandang Guo

The purpose of this paper is to construct an interval grey number NGM(1,1) direct prediction model (abbreviated as IGNGM(1,1)), which need not transform interval grey numbers…

ERP software selection using intuitionistic fuzzy and interval grey number-based MACBETH method

Mustafa Said Yurtyapan, Erdal Aydemir

Enterprise Resource Planning (ERP) software which is a knowledge-based design on the interconnective communication of business units and information share, ensures that business…

Spectrum analysis of moving average operator and construction of time-frequency hybrid sequence operator

Changhai Lin, Sifeng Liu, Zhigeng Fang, Yingjie Yang

The purpose of this paper is to analyze the spectral characteristics of moving average operator and to propose a novel time-frequency hybrid sequence operator.

A novel integrated computational TRIFMRG approach with grey relational analysis toward parametric evaluation of weld bead geometry of ms-grade: IS 2062

Xiaohui Guo, Atul kumar Sahu, Nitin Kumar Sahu, Anoop Kumar Sahu

In the presented research work, the authors fabricated the multiple MS plate (Grade: IS 2062) specimens and applied a novel integrated computational TR_IF_MR_G approach with grey…

G-GERT network model of online public opinion reversal based on kernel and grey degree

Shuli Yan, Xiangyan Zeng, Pingping Xiong, Na Zhang

In recent years, online public opinion reversal incidents have been occurring frequently, which has increased the complexity of the evolution of online public opinion, and they…

Grey variable dual precision rough set model and its application

Junliang Du, Sifeng Liu, Yong Liu

The purpose of this paper is to advance a novel grey variable dual precision rough set model for grey concept.

Case-based classification model based on information diffusion and interval gray relational analysis

Baohua Yang, Junming Jiang, Jinshuai Zhao

The purpose of this study is to construct a gray relational model based on information diffusion to avoid rank reversal when the available decision information is insufficient, or…

On distance measure and TOPSIS model for probabilistic interval-valued hesitant fuzzy sets: application to healthcare facilities in public hospitals

Jawad Ali, Zia Bashir, Tabasam Rashid

The purpose of the development of the paper is to construct probabilistic interval-valued hesitant fuzzy Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS…

Identifying influence patterns of regional agricultural drought vulnerability using a two-phased grey rough combined model

Huifang Sun, Liping Fang, Yaoguo Dang, Wenxin Mao

A core challenge of assessing regional agricultural drought vulnerability (RADV) is to reveal what vulnerability factors, under which kinds of synergistic combinations and at what…

A novel generalized grey target decision method with index and weight both containing mixed types of data

Jinshan Ma, Di Tian, Jinmeng Yue

This paper is to propose a novel generalized grey target decision method (GGTDM) with index and weight both containing mixed types of data.

Grey correlation analysis on the synergistic development between innovation-driven strategy and marine industrial agglomeration: based on China's coastal provinces

Sheng Xu, Qingde Yue, Binbin Lu

The implementation of the innovation-driven development strategy is of practical significance for improving the quality and efficiency of economic growth and accelerating the…