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Journal Articles

A novel nonlinear grey Bernoulli model based on recursive regression and pension insurance fund forecast analysis

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Xiaojun Guo, Xinyao Zhu, Kangyue Guo, Yaqin Zhong, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2026) 16 (2): 245–271.
https://doi.org/10.1108/GS-05-2025-0060
Published: 01 January 2026
View article titled, A novel nonlinear grey Bernoulli model based on recursive regression and pension insurance fund forecast analysis
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Journal Articles

An advanced data-driven spatiotemporal fusion discrete grey forecasting model for CO2 emissions prediction in urban agglomerations

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Yuanping Ding, Yaoguo Dang, Yingjie Yang, Junjie Wang, Shan Huang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2025) 15 (4): 816–859.
https://doi.org/10.1108/GS-03-2025-0034
Published: 18 September 2025
View article titled, An advanced data-driven spatiotemporal fusion discrete grey forecasting model for CO2 emissions prediction in urban agglomerations
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Journal Articles

A novel fractional order variable structure multivariable grey prediction model with optimal differential background-value coefficients and its performance comparison analysis

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Chao Xia, Bo Zeng, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2024) 14 (3): 429–450.
https://doi.org/10.1108/GS-08-2023-0082
Published: 09 February 2024
View article titled, A novel fractional order variable structure multivariable grey prediction model with optimal differential background-value coefficients and its performance comparison analysis
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Journal Articles

Solving the dilemma in supplier selection by the group of weight vector with kernel

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Sifeng Liu, Tao Liu, Wenfeng Yuan, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2022) 12 (3): 624–634.
https://doi.org/10.1108/GS-06-2021-0088
Published: 09 December 2021
View article titled, Solving the dilemma in supplier selection by the group of weight vector with kernel
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Journal Articles

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

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Changhai Lin, Sifeng Liu, Zhigeng Fang, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2022) 12 (1): 101–116.
https://doi.org/10.1108/GS-09-2020-0128
Published: 22 February 2021
View article titled, Spectrum analysis of moving average operator and construction of time-frequency hybrid sequence operator
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Journal Articles

Forecasting smog in Beijing using a novel time-lag GM(1,N) model based on interval grey number sequences

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Jia Shi, Pingping Xiong, Yingjie Yang, Beichen Quan
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2021) 11 (4): 754–778.
https://doi.org/10.1108/GS-02-2020-0025
Published: 22 December 2020
View article titled, Forecasting smog in Beijing using a novel time-lag GM(1,N) model based on interval grey number sequences
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Journal Articles

FDGM(1,1) model based on unified fractional grey generation operator

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Wei Meng, Qian Li, Bo Zeng, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2021) 11 (3): 518–533.
https://doi.org/10.1108/GS-07-2020-0093
Published: 09 December 2020
View article titled, FDGM(1,1) model based on unified fractional grey generation operator
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Journal Articles

Similarity-based information fusion grey model for remaining useful life prediction of aircraft engines

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Xiaoyu Yang, Zhigeng Fang, Xiaochuan Li, Yingjie Yang, David Mba
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2021) 11 (3): 463–483.
https://doi.org/10.1108/GS-05-2020-0066
Published: 16 October 2020
View article titled, Similarity-based information fusion grey model for remaining useful life prediction of aircraft engines
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Journal Articles

Grey theory–based BP-NN co-training for dense sequence long-term tendency prediction

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Yuling Hong, Yingjie Yang, Qishan Zhang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2021) 11 (2): 327–338.
https://doi.org/10.1108/GS-02-2020-0024
Published: 13 August 2020
View article titled, Grey theory–based BP-NN co-training for dense sequence long-term tendency prediction
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Journal Articles

Study on mechanism and filter efficacy of AGO/IAGO in the frequency domain

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Changhai Lin, Zhengyu Song, Sifeng Liu, Yingjie Yang, Jeffrey Forrest
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2021) 11 (1): 1–21.
https://doi.org/10.1108/GS-01-2020-0014
Published: 26 May 2020
View article titled, Study on mechanism and filter efficacy of AGO/IAGO in the frequency domain
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Journal Articles

A novel synthetic index of two counts and mathematical model for researcher evaluation

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Sifeng Liu, Qi Li, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2020) 10 (2): 85–95.
https://doi.org/10.1108/GS-01-2020-0012
Published: 24 April 2020
View article titled, A novel synthetic index of two counts and mathematical model for researcher evaluation
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Journal Articles

Do not try to evaluate research results in a hurry

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Sifeng Liu, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2019) 9 (1): 2–4.
https://doi.org/10.1108/GS-02-2019-082
Published: 28 January 2019
View article titled, Do not try to evaluate research results in a hurry
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Journal Articles

Explanation of terms of Grey models for decision-making

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Sifeng Liu, Zhigeng Fang, Naiming Xie, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2018) 8 (4): 382–387.
https://doi.org/10.1108/GS-10-2018-081
Published: 24 September 2018
View article titled, Explanation of terms of Grey models for decision-making
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Journal Articles

Explanation of terms of grey incidence analysis models

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Sifeng Liu, Hongyang Zhang, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2017) 7 (1): 136–142.
https://doi.org/10.1108/GS-11-2016-0045
Published: 06 February 2017
View article titled, Explanation of terms of grey incidence analysis models
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Journal Articles

Explanation of terms of grey clustering evaluation models

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Sifeng Liu, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2017) 7 (1): 129–135.
https://doi.org/10.1108/GS-11-2016-0046
Published: 06 February 2017
View article titled, Explanation of terms of grey clustering evaluation models
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Journal Articles

Explanation of terms of grey forecasting models

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Sifeng Liu, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2017) 7 (1): 123–128.
https://doi.org/10.1108/GS-11-2016-0047
Published: 06 February 2017
View article titled, Explanation of terms of grey forecasting models
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Journal Articles

An uncertain programming model for preventive maintenance scheduling

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Hamed Maleki, Yingjie Yang
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2017) 7 (1): 111–122.
https://doi.org/10.1108/GS-07-2016-0015
Published: 06 February 2017
View article titled, An uncertain programming model for preventive maintenance scheduling
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Journal Articles

Explanation of terms of sequence operators and grey data mining

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Sifeng Liu, Naiming Xie, Yingjie Yang, Jeffrey Forrest
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2016) 6 (3): 442–447.
https://doi.org/10.1108/GS-09-2016-0032
Published: 07 November 2016
View article titled, Explanation of terms of sequence operators and grey data mining
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Journal Articles

Explanation of terms of concepts and fundamental principles of grey systems

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Sifeng Liu, Yingjie Yang, Jeffrey Forrest, Handan Rui
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2016) 6 (3): 429–435.
https://doi.org/10.1108/GS-09-2016-0030
Published: 07 November 2016
View article titled, Explanation of terms of concepts and fundamental principles of grey systems
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Journal Articles

Explanation of terms of grey numbers and its operations

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Sifeng Liu, Handan Rui, Zhigeng Fang, Yingjie Yang, Jeffrey Forrest
Journal: Grey Systems: Theory and Application
Grey Systems: Theory and Application (2016) 6 (3): 436–441.
https://doi.org/10.1108/GS-09-2016-0031
Published: 07 November 2016
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