Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Shengfei Ji"'
Publikováno v:
Actuators, Vol 13, Iss 1, p 38 (2024)
The hydraulic pump plays a pivotal role in engineering machinery, and it is essential to continuously monitor its operating status. However, many vital signals for monitoring cannot be directly obtained in practical applications. To address this, we
Externí odkaz:
https://doaj.org/article/b47683ce60cc459b8e71ca1adbad8f59
Publikováno v:
IEEE Access, Vol 9, Pp 17649-17661 (2021)
The electric shovel is a bucket-equipped mining excavator widely used in open-pit mining today. The prolonged direct impact of the bucket teeth with hard and abrasive materials such as ore during the process of the mining excavation can cause the buc
Externí odkaz:
https://doaj.org/article/92c144d9f9014ad59012edb301e10d9b
Publikováno v:
Mathematics, Vol 10, Iss 21, p 3953 (2022)
Traditional data-driven intelligent fault diagnosis methods have been successfully developed under the closed set assumption (CSA). CSA-based fault diagnosis assumes that the fault types in the test set are consistent with that in the training set, w
Externí odkaz:
https://doaj.org/article/67222990de974f5ab2924b91440469ae
Publikováno v:
Shock and Vibration, Vol 2018 (2018)
This paper presents a method that combines Shuffled Frog Leaping Algorithm (SFLA) with Support Vector Machine (SVM) method in order to identify the fault types of rolling bearing in the gearbox. The proposed method improves the accuracy of fault diag
Externí odkaz:
https://doaj.org/article/91c58fff53a74e698f7f863b83d360ad
Publikováno v:
Shock and Vibration, Vol 2018 (2018)
This paper presents a method that combines Shuffled Frog Leaping Algorithm (SFLA) with Support Vector Machine (SVM) method in order to identify the fault types of rolling bearing in the gearbox. The proposed method improves the accuracy of fault diag
Autor:
Lulu Wu, Zhenliang Pan, Liangxin Fan, Guoyu Yang, Lijun Shi, Shengfei Jiang, Xiaodan Chang, Bingyi Zhou, Yanyan Yang, Cuilian Xu, Caixia Wang
Publikováno v:
Journal of Saudi Chemical Society, Vol 27, Iss 1, Pp 101578- (2023)
A one-pot two-step reaction of 2-(trifluoromethyl)-2-hydroxy-2H-chromene with aryl ketone afforded α-trifluoromethylated tertiary alcohols bearing coumarins. The atomic economic and simply manipulative reaction involved premier treatment of reaction
Externí odkaz:
https://doaj.org/article/fd3c9a4978a94f4ab5dfc4d03c2eb492
Autor:
Bingyi Zhou, Xinxin Yuan, Liangxin Fan, Zhenliang Pan, Xiaodan Chang, Shengfei Jiang, Lulu Wu, Caixia Wang, Guoyu Yang, Xiaoming Ji, Lijun Shi, Cuilian Xu
Publikováno v:
Journal of Saudi Chemical Society, Vol 26, Iss 6, Pp 101572- (2022)
A series of novel 1-(β-coumarinyl)-1-(β-indolyl)-1-(α-thiophenyl)trifluoroethane derivatives 5aaa-5hdb were prepared by one-pot reaction from 3-(trifluoroacetyl)coumarin with indole and α-substituted thiophene. Their structures were confirmed by
Externí odkaz:
https://doaj.org/article/3276c41da71a4b75b938201334669ed4
Autor:
Shengfei Jiang, Guoyu Yang, Lijun Shi, Liangxin Fan, Zhenliang Pan, Caixia Wang, Xiaodan Chang, Bingyi Zhou, Meng Xu, Lulu Wu, Cuilian Xu
Publikováno v:
Molecules, Vol 28, Iss 1, p 260 (2022)
A new method for the synthesis of α-trifluoromethylated tertiary alcohols bearing coumarins is described. The reaction of 3-(trifluoroacetyl)coumarin and pyrrole provided the target compounds with high yields under catalyst-free, mild conditions. Th
Externí odkaz:
https://doaj.org/article/63fe6651a2714e0dbf0633e59b153bdf