Article
Mathematics, Applied
Changjun Huang, Yuanzhi Cao, Lv Zhou
Summary: The EMD-GM(1,1) model combines the advantages of the two models to effectively separate different frequency components of the deformation sequence, resulting in higher prediction accuracy.
COMPUTATIONAL & APPLIED MATHEMATICS
(2021)
Article
Environmental Sciences
Xianqi Zhang, Xilong Wu, Yimeng Xiao, Jingwen Shi, Yue Zhao, Minghui Zhang
Summary: Runoff forecasting is crucial for the rational use of water resources, flood prevention, and the development of ecological civilization. The Hodrick-Prescott filter (HP filter) is proposed as a new approach to pre-process runoff time series data, while the HPF-GM(1,1)-coupled model provides new ideas for nonlinear runoff prediction. The proposed model is able to separate seasonal factors from non-seasonal factors and improve the prediction accuracy compared to traditional models.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Xiaorong Tan, Jiangning Xu, Fangneng Li, Miao Wu, Ding Chen, Yifeng Liang
Summary: This paper proposes an optimized GM (1,1) model for satellite clock bias prediction, improving the accuracy and stability through the use of a new fitting model and initial condition.
IET RADAR SONAR AND NAVIGATION
(2022)
Article
Automation & Control Systems
Bocun He, Qingzhi Zhang, Xinmin Zhang
Summary: This paper proposes a new dynamic feature extractor called TempoATTNE-DFE, which improves computational efficiency by developing a new encoder structure and introducing an attention mechanism. It is applied to quality prediction tasks and achieves better performance compared to other methods.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Computer Science, Information Systems
Hui Du
Summary: This paper proposes a new method for predicting athletes' training performance by combining the improved GM (1,1) model with the characteristics of athletes' performance. Experimental results show that this method has better prediction accuracy compared to other models.
MOBILE INFORMATION SYSTEMS
(2022)
Article
Mathematics, Interdisciplinary Applications
Huan Wang, Yuhong Wang, Dongdong Wu
Summary: This study successfully predicted the railway passenger volume in China by establishing a seasonal cycle GM(1,1) model combined with a seasonal index, achieving good forecasting results. The forecasting results are scientific, practical, and valuable for reference.
GREY SYSTEMS-THEORY AND APPLICATION
(2022)
Article
Computer Science, Artificial Intelligence
Dang Luo, Yan Ma
Summary: This paper proposes a pseudo-grey metabolic grey Markov model to deal with the prediction issue of original sequences that are oscillation sequences. The model not only provides new ideas for the data preprocessing problem of the grey Markov model, but also solves the problem of errors due to individual subjectivity in state interval division. It provides a novel idea for the development of grey prediction models. The rationality and validity of the model are illustrated by taking the Zhengzhou City of Henan Province as examples.
JOURNAL OF INTELLIGENT & FUZZY SYSTEMS
(2022)
Article
Geochemistry & Geophysics
Chong Shi, Wangyang Li, Qingxiang Meng
Summary: This paper proposed a rate-dependent strain-softened micromechanical contact model and analyzed an earthquake-induced landslide as a case study using this model. The results show that the model can provide a reasonable solution to seismic-induced landslides.
Article
Green & Sustainable Science & Technology
Xiaoyun Zhang, Jie Bao, Shiwei Xu, Yu Wang, Shengwei Wang
Summary: As the largest producer and consumer of grain in the world, China's grain security is confronted with issues such as water and soil resource shortages, a fragile ecological environment, and infrastructure constraints. This study constructed a GM(1,1) prediction model for China's grain consumption, focusing on the grain consumption structure, and the results show that China's grain consumption will continue to increase.
Article
Mathematics, Interdisciplinary Applications
Liang Zeng
Summary: By combining the Riccati difference equation with the conventional DGM, a new grey model DGRM(1,1) is proposed, which is suitable for predicting data series with different changing trends and shows high precision and potential.
GREY SYSTEMS-THEORY AND APPLICATION
(2021)
Article
Multidisciplinary Sciences
Hui Yu, Yang Yang, Bin Li, Bowen Liu, Yuanhu Guo, Yunqi Wang, Zhongfu Guo, Ronghua Meng
Summary: A community carbon emissions sample database is created based on the power system emission factors of North China Power Grid. The support vector regression (SVR) model is trained using genetic algorithm (GA) optimization to forecast power carbon emissions. A community carbon emissions warning system is designed based on the results.
SCIENTIFIC REPORTS
(2023)
Article
Education & Educational Research
Linyan Li, Xiao Bai, Hongshan Xia
Summary: A new methodology is employed to predict the trend of higher education development in a country accurately. A weakening buffer operator-based GM (1, 1) model is constructed using Kazakhstan's gross enrollment rate of higher education as the subject of study, which eliminates disturbance and increases prediction accuracy. The proposed method is more practical, reliable, and superior compared to other methods.
EDUCATION AND INFORMATION TECHNOLOGIES
(2023)
Article
Biophysics
Xiaoli Li, Chang Xu, Kang Wang, Xu Yang, Yang Li
Summary: This paper studies the future prediction of predicted mean vote (PMV) index of indoor environment. PMV is used as the evaluation index to represent the thermal comfort of the human body. The main environmental factors affecting PMV index are identified as temperature, humidity, black globe temperature, wind speed, average radiation temperature, and clothing surface temperature, which have a complex nonlinear relationship. An improved grey system prediction model GM(1,1) is used to predict the future time of PMV. Additionally, an adaptive GM(1,1) improved model is proposed to enhance the prediction accuracy based on the irregularity and uncertainty of PMV values in time series.
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
(2023)
Article
Mathematics, Interdisciplinary Applications
Jun Zhang, Chong Liu, Tongfei Lao, Zhanbo Chen
Summary: The study introduces the discrete grey DGMFP(1,1,r) model with fractional polynomial to improve prediction accuracy, utilizing a quantum genetic algorithm to determine the optimal degree of fractional polynomials. Empirical results demonstrate that this model outperforms other discrete grey models in terms of accuracy and generalization ability.
JOURNAL OF GREY SYSTEM
(2021)
Article
Computer Science, Artificial Intelligence
Wuyong Qian, Aodi Sui
Summary: The proposed structural adaptive discrete grey prediction model introduces nonlinear and periodic terms to capture nonlinear and linear trends in time series, improving adaptability. The model's coefficients are determined using particle swarm optimization and hold-out cross-validation, enabling adaptive selection of the model structure. Consideration of consistency, unbiasedness, and compatibility with other grey models further validates the feasibility and practicability of the model.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Automation & Control Systems
Lei Cao, Xiyu Cao, Qiangqiang Wang, Yiqiu Cao
Summary: The study aims to address the challenge of obtaining accurate results when using the GM(1,1) model for fitting and predicting approximate non-homogeneous exponential sequences by developing a fuzzy GM(1,1) model (FGM) that combines Grey Theory and Credibility Theory. The FGM introduces double exponential fuzzy numbers and their membership functions, utilizing Credibility Theory to calculate the expectation of fuzzy variables, resulting in unbiased results for the tight non-homogeneous exponential sequences. The effectiveness, feasibility, and optimization of the FGM(1,1) model are illustrated through empirical and numerical case studies.
INTERNATIONAL JOURNAL OF FUZZY SYSTEMS
(2022)
Article
Materials Science, Ceramics
Qiangqiang Wang, Yongsheng Fang, Maosheng Cao
Summary: Transition metal carbide or nitride (MXenes) hold promise for electrochemical energy storage due to their excellent properties. Researchers have successfully constructed 3D TPCs nanoarchitectures and manufactured MSCs micro-supercapacitors with competitive energy storage capacities.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yuhang Han, Jie Yuan, Yuhang Zhu, Qiangqiang Wang, Lin Li, Maosheng Cao
Summary: By confinedly implanting WSe2 nanosheets on multi-walled carbon nanotubes, it is possible to obtain WSe2@CNTs nanohybrids with tailored conductive network and polarization. The electromagnetic properties and microwave absorption performance of the nanohybrids can be effectively adjusted by changing the hybrid ratio of WSe2 and CNTs, achieving multi-band microwave absorption.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Qiangqiang Wang, Yongsheng Fang, Maosheng Cao
Summary: In this study, researchers successfully constructed a heterojunction composite material with high specific capacitance and long-term stability. The flexible capacitor based on this material showed good flexibility and capacitance retention.
Article
Physics, Multidisciplinary
Xin Li, Yunsong Dong, Dongguo Kang, Wei Jiang, Hao Shen, Longyu Kuang, Huasen Zhang, Jiamin Yang, Qiang Wang, Chuansheng Yin, Tianxuan Huang, Wenyong Miao, Zhongjing Chen, Qi Tang, Xiaoshi Peng, Zifeng Song, Xing Zhang, Jianjun Dong, Bo Deng, Keli Deng, Qiangqiang Wang, Yimeng Yang, Xiangming Liu, Longfei Jing, Hang Li, Zhongjie Liu, Bo Yu, Ji Yan, Yudong Pu, Shaoyong Tu, Yongteng Yuan, Dong Yang, Feng Wang, Wei Zhou, Xiaoxia Huang, Zhibing He, Haijun Zhang, Yiyang Liu, Shiyang Zou, Baohan Zhang, Yongkun Ding, Shaoping Zhu, Weiyan Zhang
Summary: The study investigates the indirect drive experiment using the six-cylinder-port hohlraum for the first time, utilizing a new experimental platform and a quasi-3D simulation model. The experiments and simulations demonstrate the similarities between the six-cylinder-port hohlraum and the cylindrical hohlraum in terms of X-ray conversion efficiency and low laser backscatter. This research has significant implications for numerically assessing the laser energy required by the ignition-scale six-cylinder-port hohlraum.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
Yuhang Zhu, Qiangqiang Wang, Yuhang Han, Lin Li, Maosheng Cao
Summary: By constructing WSe2@CNTs heterojunction, excellent microwave absorbing and EMI shielding is achieved, making it a suitable candidate for EM bifunctional materials.
APPLIED SURFACE SCIENCE
(2022)
Review
Metallurgy & Metallurgical Engineering
Mao-Guo Zhao, Hao Liu, Xu-Feng Wang, Gu-Jun Chen, Qiang-Qiang Wang, Xu-Bin Zhang, Sheng-Ping He
Summary: This study investigates the influence of TiO2 in ladle slag on inclusions in liquid steel. Experimental results show the presence of various types of inclusions in the steel samples, which are affected by the MgO and Ti content in the liquid steel and the composition of the slag.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yuhang Han, Qiangqiang Wang, Qi Zheng, Maosheng Cao, Jie Yuan, Lin Li
Summary: In this study, novel ternary WSe2@CNTs/Co3O4 nanocomposites with efficient multi-band electromagnetic absorption capabilities were successfully fabricated. The minimum reflection loss (RL) can reach up to -54.09 dB and the effective bandwidth (BW) of RL < -10 dB can reach 4.64 GHz. The bandwidth can be effectively tuned by optimizing the content of Co3O4 and thickness of absorbers to achieve multiband absorption.
Review
Metallurgy & Metallurgical Engineering
Gujun Chen, Qiangqiang Wang, Shengping He
Summary: This review summarizes and analyzes computational fluid dynamics (CFD) modeling of argon-steel-slag flow, focusing on CFD models and validation, bubble behaviors, interfacial closure laws, and turbulence closures. It suggests that the future challenge is to develop a model for coupling dispersed and sharp interfaces, accompanied by appropriate bubble behaviors and general closure laws of interfacial forces. More experiments are required to fully understand multiphase flow in a real RH degasser.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yong-Sheng Fang, Jie Yuan, Ting -Ting Liu, Qiang-Qiang Wang, Wen-Qiang Cao, Mao-Sheng Cao
Summary: High-performance multifunctional electromagnetic materials with adjustable electromagnetic wave absorption and interference shielding performance have been developed through internal gene regulation. This research provides a promising strategy for controlling electromagnetic pollution and alleviating energy issues.
Article
Engineering, Environmental
Qiangqiang Wang, Ben Niu, Yuhang Han, Qi Zheng, Lin Li, Maosheng Cao
Summary: Inspired by green vines in nature, a hierarchical structured nano-micro vine was constructed, which achieved excellent microwave absorption and efficient green electromagnetic interference (EMI) shielding. The study also proposed a credibility index for green EMI shielding. Additionally, considerable supercapacitance performance was obtained, and a microwave recovery device integrated with multiple functions was successfully constructed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Min Zhang, Mao-Sheng Cao, Qiang-Qiang Wang, Xi-Xi Wang, Wen-Qiang Cao, Hui-Jing Yang, Jie Yuan
Summary: The study achieved precise control of the electromagnetic performance of bismuth iron cobalt oxide by changing the cobalt ion stoichiometry, improving strain response sensitivity and stealth capability, and integrating wireless sensing with electromagnetic wave attenuation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Shanshan Wang, Yameng Song, Yanyan Sun, Guozhen Guan, Qiangqiang Wang, Yuanyuan Shang, Fengmei Guo, Jie Xu, Rui Pang, Yingjiu Zhang
Summary: In this study, a cost-effective and efficient electrocatalyst for hydrogen evolution was developed. The NiMoP/NiCoZn/CFP heterostructure electrocatalyst exhibited synergistic electrocatalytic activity and showed low overpotentials and excellent stability at high current densities. The cooperative electronic interactions between NiMoP and NiCoZn and the complete wettability of the catalyst contributed to its superior electrocatalytic activity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Fluids & Plasmas
Hui Cao, Xufei Xie, Yaohua Chen, Yunsong Dong, Liquan Wang, Zhurong Cao, Xu Chen, Qiangqiang Wang, Wei Zhou, Wei Zhang, Zhichao Li, Sanwei Li, Bo Deng, Liang Hao, Shu Li, Junfeng Wu, Guoli Ren, Xudeng Hang, Wenyi Huo, Xiaoxia Huang, Xiaoshi Peng, Dong Yang, Tao Xu, Lifei Hou, Xingsen Che, Liang Guo, Huabing Du, Xiaoan He, Chaoguang Li, Pin Yang, Qianqian Gu, Yuancheng Wang, Kuixing Zheng, Yunbao Huang, Bin Feng, Guanghui Yuan, Baibin Jiang, Haijun Zhang, Feng Wang, Jiamin Yang, Shenye Liu, Jun Xie, Zhibing He, Kai Du, Jie Liu, Shiyang Zou, Yongkun Ding, Qihua Zhu, Ke Lan
Summary: The novel octahedral spherical hohlraum is a promising approach for the next generation of laser systems to achieve predictable and reproducible fusion gain. Repointing the laser beams at a cylindrically configured laser facility can approach the ideal octahedral beam configuration. The investigation and experiment at the SGIII facility showed the feasibility of the 32-beam optimum repointing scheme and demonstrated the generation of high energy inside an octahedral hohlraum.
PHYSICS OF PLASMAS
(2023)
Article
Chemistry, Multidisciplinary
Bing Du, Jinxiu Zhao, Liang Tian, Qiangqiang Wang, Xiang Ren, Xu Sun, Qin Wei, Yuyang Li, Dan Wu
Summary: Introducing defects can enhance the electrocatalytic activity of nanomaterials. In this study, defect-rich and porous cobalt phosphide nanowire array electrocatalyst was successfully prepared from a MOF material, showing excellent catalytic performance in water splitting. The catalyst exhibits efficient hydrogen and oxygen evolution reactions and demonstrates good stability.
NEW JOURNAL OF CHEMISTRY
(2022)