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Robust Model Averaging Method Based on lof algorithm

Communications in Mathematical Research 2023年第3期39卷 386-413页

作者： Fan Wang Kang You Guohua Zou School of Mathematical Sciences Capital Normal UniversityBeijing 100048P.R.China

Model averaging is a good alternative to model selection,which can deal with the uncertainty from model selection process and make full use of the information from various candidate ***,most of the existing model averaging criteria do not consider the influence of outliers on the estimation *** purpose of this paper is to develop a robust model averaging approach based on the local outlier factor(lof)algorithm which can downweight the outliers in the *** optimality of the proposed robust model averaging estimator is derived under some regularity ***,we prove the consistency of the lof-based weight estimator tending to the theoretically optimal weight *** studies including Monte Carlo simulations and a real data example are provided to illustrate our proposed methodology.

关键词： Outliers lof algorithm robust model averaging asymptotic optimality consistency

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Research on Total Electric Field PredictionMethod of Ultra-High Voltage Direct Current Transmission Line Based on Stacking algorithm

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Computer Systems Science & Engineering 2024年第3期48卷 723-738页

作者： Yinkong Wei Mucong Wu Wei Wei Paulo R.F.Rocha Ziyi Cheng Weifang Yao Key Laboratory of Operation and Control of Terraced Hydropower Plants in Hubei Province Three Gorges UniversityYichang443002China School of Electricity and New Energy Three Gorges UniversityYichang443002China Marketing Service Center(Metering Center) State Grid Hubei Electric Power Co.Ltd.Wuhan430072China Centre for Functional Ecology-Science for People&the Planet Associate Laboratory TERRADepartment of Life SciencesUniversity of CoimbraCoimbra3000-456Portugal Research Institute of Electric Power Science State Grid Anhui Electric Power Company LimitedHefei230601China

Ultra-high voltage(UHV)transmission lines are an important part of China’s power grid and are often surrounded by a complex electromagnetic *** ground total electric field is considered a main electromagnetic environment indicator of UHV transmission lines and is currently employed for reliable long-term operation of the power ***,the accurate prediction of the ground total electric field remains a technical *** this work,we collected the total electric field data from the Ningdong-Zhejiang±800 kV UHVDC transmission project,as of the Ling Shao line,and perform an outlier analysis of the total electric field *** show that the Local Outlier Factor(lof)elimination algorithm has a small average difference and overcomes the performance of Density-Based Spatial Clustering of Applications with Noise(DBSCAN)and Isolated Forest elimination ***,the Stacking algorithm has been found to have superior prediction accuracy than a variety of similar prediction algorithms,including the traditional finite *** low prediction error of the Stacking algorithm highlights the superior ability to accurately forecast the ground total electric field of UHVDC transmission lines.

关键词： DC transmission line total electric field effective data multivariable outliers lof algorithm Stacking algorithm

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