Search

Your search keyword '"Li, Yan-Feng"' showing total 141 results
Start Over Author "Li, Yan-Feng" Publication Year Range Last 3 years
141 results on '"Li, Yan-Feng"'

24. A weakest link theory‐based probabilistic fatigue life prediction method for the turbine disc considering the influence of the number of critical sections.

Author

Wang, Tianxing, Li, Yan‐Feng, Huang, Hong‐Zhong, and Bai, Song

Subjects
*FATIGUE life, *WEIBULL distribution, *TURBINES, *STATISTICAL correlation, *FORECASTING
Abstract

This study utilizes the rank correlation coefficient to examine the multi‐site failure correlation of turbine discs. Drawing from the stress‐strength interference model, reliability models both with and without factoring in the multi‐site failure correlation are constructed. Furthermore, the weakest link theory (WLT) within the context of the Weibull distribution function is invoked to develop a model for predicting the fatigue life of turbine discs, taking into account the quantity of critical sections. The variability in the low cycle fatigue (LCF) of turbine discs is scrutinized, leading to the formulation of a probabilistic fatigue life prediction method for these discs. When comparing theoretical values with experimental ones, it becomes evident that factoring in the multi‐site failure correlation significantly enhances the accuracy of turbine disc life predictions. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

25. A new ordering method of basic events in dynamic fault tree for sequential binary decision diagram.

Author

Huang, Tudi, Zeng, Ying, Li, Yan‐Feng, Liu, Jun, and Huang, Hong‐Zhong

Subjects
FAULT trees (Reliability engineering), RELIABILITY in engineering, COMPUTATIONAL complexity, DYNAMICAL systems
Abstract

Dynamic fault tree (DFT) is a reliable method for modeling complex systems with dynamic characteristics. However, evaluating the reliability of such systems can be complex. The sequential binary decision diagram (SBDD) method simplifies this process by reducing computational complexity. This study investigates factors influencing SBDD size and proposes a new method, the complete priority ordering method, for ordering basic events in SBDDs. Results demonstrate the method's effectiveness in comparison to existing approaches. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

40. Sitting or Standing Data Acquisition Based Breast Ultrasound Computed Tomography

Author

Peng Yahui, LI Ruijing, Chen Houjin, Li Jupeng, and Li Yan-Feng

Subjects
medicine.diagnostic_test, Computer science, business.industry, Breast imaging, Applied Mathematics, Ultrasound, Iterative reconstruction, medicine.disease, Sitting, Breast cancer, Data acquisition, medicine, Computer vision, Noise (video), Artificial intelligence, Electrical and Electronic Engineering, skin and connective tissue diseases, business, Breast ultrasound
Abstract

Ultrasound computed tomography (UCT) is a promising approach for early breast cancer screening. However, current studies which use prone posture to collect breast ultrasonic data cause four problems, a long non-data-acquisition time, inconvenient, possible chances for cross infection, and a large area occupied by equipment. The purpose of this study is to estimate a complete breast UCT image by using sitting or standing data acquisition, which can obtains a more rapid, convenient and sanitary examination process, and a less space occupied by equipment. Therefore, this study proposes a sitting or standing data acquisition based breast UCT method, which is a more practical data acquisition method for breast UCT. This study places a uniform soft sleeve on the outside of the breast so that it would not be deformed significantly due to the change of body posture. Because the soft sleeve is an influencing factor from outside for breast imaging, this study discusses the considerations for selecting that. Computer simulations are conducted to prove the effectiveness of the proposed method. Results suggest that, by using a soft sleeve whose sound speed is between 1450m/s and 1550m/s, the proposed method is effective; the biases of the reconstructed images are less than 1% under the 5% noise condition.

Published
2021

48. Additional file 1 of Association between serum vitamin D levels and visceral adipose tissue among adolescents: a cross-sectional observational study in NHANES 2011–2015

Author

Li, Yan-feng, Zheng, Xiao, Gao, Wen-lan, Tao, Feng, and Chen, Yi

Abstract

Additional file 1: Supplementary Table 1. The missing data of covariates and their processing. Supplementary Table 2. Association between covariates and VAT mass. Supplementary Table 3. The adjusting roles of potential confounders on the estimates of serum vitamin D on VAT.

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results