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  • IOP Publishing  (2)
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  • IOP Publishing  (2)
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  • 1
    Online Resource
    Online Resource
    IOP Publishing ; 2023
    In:  Journal of Physics: Conference Series Vol. 2474, No. 1 ( 2023-04-01), p. 012081-
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2474, No. 1 ( 2023-04-01), p. 012081-
    Abstract: For ensuring the safe operation of distribution switch cabinet, a regular maintenance system is implemented. As the specific conditions of the equipment operation are not considered, there are too many unnecessary shutdowns and maintenance, resulting in the situation that “the equipment is not damaged, but repaired”. Moreover, troubleshooting mainly depends on the sense organs, experience and instruments of the maintenance personnel. The ability and experience of the maintenance staff is what limits the quality of the maintenance since the time spent identifying the fault reasons typically makes up more than 60% of the overall troubleshooting time. The stability of the entire power supply system is directly impacted by the dependability and safety of the power distribution switchgear. To prevent “insufficient maintenance” and “excessive maintenance” brought on by planned maintenance. This paper examines the RBF neural network’s offline and online training techniques as a result. Additionally, the analysis of the RBF neural network’s offline and online training techniques is proposed using the closest neighbor-gradient hybrid learning algorithm. Additionally, the hybrid closest neighbor-gradient training approach is suggested. Experiments using Matlab simulations show that the diagnostic results are more accurate.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2166409-2
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  • 2
    Online Resource
    Online Resource
    IOP Publishing ; 2020
    In:  IOP Conference Series: Materials Science and Engineering Vol. 794, No. 1 ( 2020-03-01), p. 012012-
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 794, No. 1 ( 2020-03-01), p. 012012-
    Abstract: The characteristics of the water flow in the gradually expanding and gradually contracting watercourse are very complicated, and the width-to-narrowness ratio has a significant influence on the hydraulic characteristics of the gradually expanding and gradually contracting watercourse. Five three-dimensional hydraulic calculation models with different width-to-narrowness ratios were established to study its hydraulic characteristics. The results show that: (1) river flow gradually appears as the recirculation zone with the increase of the width-to-narrowness ratio. The recirculation zone increases gradually with the increase of the width-to-narrowness ratio and the shapes are different. The flow velocity in the recirculation zone is negatively correlated with the width-to-narrowness ratio. (2) When the width-to-narrowness ratio is small, the shearing force distribution of gradually expanding and gradually contracting sections are basically in “Hump-shape” along the Y-axis; When the width-to-narrowness ratio is large, the section basically shows a trend of “parabola-like” change that increases first and then decreases near the shore, and the average shearing force of the expanding section is larger than that of the contracting section. (3) As the width-to-narrowness ratio of the watercourse increases, the shearing force at the widest part of the river section gradually decreases, and the shearing force of the side wall at the contracting section is larger than that of the expanding section.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2506501-4
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