New Method to Identify Transformer Inrush Current Based on FFT and SVM

Gong, Mao Fa; Li, Guo Liang; Xia, Wen; Yan, Hong; Qu, Jing Wen; Wang, Xiao Yu

doi:10.4028/www.scientific.net/amm.313-314.887

Cited by 1 publication

(1 citation statement)

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“…For the "Range" model, there may be difficulties in parameter selection, such as weight coefficients and evaluation coefficients [61].…”

Section: Limitations Of the Modelsmentioning

confidence: 99%

"Biomathematical Analysis on the Evaluation Scheme for Large Scale Innovation Competition"

Zhao

2023

BJSTR

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This paper discusses the research on the allocation plan between experts and works in large-scale innovation competitions, establishes 0-1 planning model, Z-score evaluation model, PCA evaluation model, fuzzy evaluation model, "range" model, and difference perception evaluation model. It mainly uses linear programming algorithm and PCCs correlation coefficient to obtain the optimal plan for the allocation of experts and works. We use the method of linear programming to establish a 0-1 planning model with the goal function of maximizing the coverage rate of review experts to participating teams and the number of cross reviews, and sets the constraint condition that each work can be reviewed by 5 different review experts, each expert can review 120 different works, all variables are non-negative integers. An optimal solution is obtained, and the average distance between the review experts and works is calculated as 1439.29893, at this time, the comparability of the review plan is strong. Through analyzing the relationship between the original scores of experts and awards for works, the three evaluation models are redesigned: Z-score evaluation scheme, PCA evaluation scheme, fuzzy evaluation scheme. The correlation coefficients between the three plans and the original plan are calculated as 0.94, 0.86, and 0.89 respectively. Therefore, it can be seen that the Z-score evaluation scheme is better than the other two schemes.We have designed a new standard score calculation formula to better reflect the level of an article in the overall work, to calculate the ranking of scores, and analyzed it with the actual ranking of award-winning papers agreed upon by multiple experts. The correlation is 96.32%, indicating that the new standard score formula is reliable. By calculating and analyzing the average score and range of two stages of reviews, it is found that the average score and range of the first stage are significantly higher than those of the second stage. The reason may be that the experts in the second stage require stricter standards, and their evaluations are more uniform, which can more accurately evaluate works and eliminate differences in scores among different experts. Therefore, it is more reasonable to adopt two stages for review. For those works with excessively large range outside the low range, this paper establishes a "range" model so that these works can be processed programmatically. Through this model, it is concluded that works with large range values have a connection with awards. Based on the method of differential decision-making, we established a complete innovation competition evaluation model -difference perception evaluation model. This model innovatively integrates the characteristics of multiple reviews and the differences between expert judges, can quickly output the final results, and calculates MSE as 0.24 and R² as 0.99 by evaluating and testing the model. The results show that the model can effectively improve the quality and efficiency of the review. At the same time, it makes a preli...

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“…For the "Range" model, there may be difficulties in parameter selection, such as weight coefficients and evaluation coefficients [61].…”

Section: Limitations Of the Modelsmentioning

confidence: 99%