Results 1 to 10 of about 236,714 (209)

Risk prediction and risk factor analysis of urban logistics to public security based on PSO-GRNN algorithm. [PDF]

PLoS ONE, 2020
For the complicated operation process, many risk factors, and long cycle of urban logistics, it is difficult to manage the security of urban logistics and it enhances the risk. Therefore, to study a set of effective management mode for the safe operation
Mingjing Zhao, Shouwen Ji, Zhenlin Wei
doaj   +2 more sources

Induction Motor Stator Winding Inter-Tern Short Circuit Fault Detection Based on Start-Up Current Envelope Energy

Sensors, 2023
Inter-turn short circuit (ITSC) is a common fault in induction motors. However, it is challenging to detect the early stage of ITSC fault. To address this issue, this paper proposes an ITSC fault detection method for three-phase induction motors based on
Liting Chen, Jianhao Shen, Gang Xu, Cheng Chi, Qiaohui Feng, Yang Zhou, Yuanzhi Deng, Huajie Wen   +7 more
doaj   +1 more source

Time Differential Pricing Model of Urban Rail Transit Considering Passenger Exchange Coefficient

Promet (Zagreb), 2022
Passenger exchange coefficient is a significant factor which has great impact on the pricing model of urban rail transit. This paper introduces passenger exchange coefficient into a bi-level programming model with time differential pricing for urban rail
Qiushi Zhang, Jing Qi, Yongtian Ma, Jiaxiang Zhao, Jianjun Fang   +4 more
doaj   +1 more source

Research on Defect Detection Method of Railway Transmission Line Insulators Based on GC-YOLO

IEEE Access, 2023
The insulator defect targets in Unmanned Aerial Vehicle (UAV) images are often small and set against complex backgrounds. Consequently, traditional object detection algorithms commonly struggle to identify these minor defects.
Lu Ding, Zhi Qiang Rao, Biao Ding, Shao Jia Li   +3 more
doaj   +1 more source

DF-YOLO: Highly Accurate Transmission Line Foreign Object Detection Algorithm

IEEE Access, 2023
Ensuring the promptly removal of foreign objects from transmission lines is crucial for electricity safety. However, the existing object detection algorithms exhibit low precision and recall due to factors such as uncertainty in the type of foreign ...
Shao Jia Li, Yan Xia Liu, Miao. Li, Lu Ding   +3 more
doaj   +1 more source

The influence of aging time and moisture content on the tensile strength of transformer bushing insulating paper

AIP Advances, 2022
The parameter of tensile strength for transformer bushing insulating paper occupies an important position in the structural design and life evaluation of transformer bushing.
Quanmin Dai, Guowei Mu, Fuwen Tan, Huidong Chen, Xianggang You, Yanxia Liu, Guang Cheng   +6 more
doaj   +1 more source

Modeling horizontal collaboration efficiency of several supply chains [PDF]

SHS Web of Conferences, 2021
Research background: Economic relations, which are formed under conditions of uncertainty and instability of the surrounding, require highly efficient techniques of engineering logistics activities. The high competitiveness on the logistics market forced
Galkin Andrii, Kush Yevhen, Roslavtsev Dmytro, Prunenko Dmytro, Lobashov Oleksii   +4 more
doaj   +1 more source

Temperature Segment Compensation Method of Dissipation Factor for Insulation Diagnosis in Converter Transformer Bushing

IEEE Access, 2022
Temperature compensation occupies a significant function in the insulation condition evaluation of converter transformer bushings based on the Frequency Domain Spectroscopy (FDS), which could influence the accuracy of its insulation diagnosis.
Quanmin Dai, Yanxia Liu, Xin Yu, Yinoon Zhang, Huidong Chen, Zhiming Huang   +5 more
doaj   +1 more source

Approaching delivery as a service [PDF]

, 2020
This paper explores the new logistics business model of Delivery as a Service, a concept aiming at a more efficient, fast and customer-oriented practice, linking IT solution development, urban logistics operations, supply chain efficiency and new ...
Huschebeck, M., Huschebeck, M., Leonardi, J., Leonardi, J.   +3 more
core   +1 more source

A Long-Term Traffic Flow Prediction Model Based on Variational Mode Decomposition and Auto-Correlation Mechanism

Applied Sciences, 2023
Traffic flow forecasting, as an integral part of intelligent transportation systems, plays a critical part in traffic planning. Previous studies have primarily focused on short-term traffic flow prediction, paying insufficient attention to long-term ...
Kaixin Guo, Xin Yu, Gaoxiang Liu, Shaohu Tang   +3 more
doaj   +1 more source