Results 21 to 30 of about 2,080,407 (258)

DENSE RECONSTRUCTION FOR TUNNELS BASED ON THE INTEGRATION OF DOUBLE-LINE PARALLEL PHOTOGRAPHY AND DEEP LEARNING [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
In scenes of tunnels and underground engineering projects, the 3D modeling based on the traditional horizontal baseline photography method is difficult to make a trade-off between the modeling efficiency and image overlap under narrow space and close ...
R. Zhang, R. Zhang, M. Jing, X. Yi, H. Li, G. Lu   +5 more
doaj   +1 more source

Single-ended method to accurately calculate UHV AC transmission line frequency parameters

MATEC Web of Conferences, 2018
The power frequency parameter of transmission line is the basic parameter of line over-voltage calculation. It is necessary to get the parameters of 1000kV AC double-circuit line on the same tower in order to guide the operation of the project.
Fan GAN, Nana ZHANG, Yun-ge LI, Zhouxing Fu   +3 more
doaj   +1 more source

Registration Method of Single-Line Point Clouds and Images Based on Depth Learning

Journal of Physics: Conference Series, 2023
Abstract In high-definition map production, the point cloud and image data collected by the collection vehicle play a supportive role in high-definition map production. Point cloud data can provide accurate 3D spatial positioning, while image data can provide rich semantic information.
openaire   +1 more source

Fault Line Selection of Single Phase Grounding Based on Wavelet Packet Full Frequency Analysis and OS-ELM

Journal of Harbin University of Science and Technology, 2021
In order to enhance effectiveness of single-phase ground fault feature extraction and to achieve exactly identification of fault line selection，a new fault line selection method of single phase grounding fault based on wavelet packet and online ...
JI Wen-lu, ZHAO Xiao-long, ZHANG Ming, YANG Hong-lei, WENG Jia-ming   +4 more
doaj   +1 more source

An indicator of local auroral electrojet peak intensity and latitude inferred from scalar magnetometer measurements made by the Swarm satellites

Journal of Space Weather and Space Climate
Auroral electrojets (AEJ) are crucial for understanding the connection between solar wind and the plasma environment near Earth. However, there has been limited research by using peak of AEJ as an index to monitor the auroral activity.
Qian Bohao, Xiong Chao, Wang Fengjue, Yang Yanyan, Li Kuan   +4 more
doaj   +1 more source

Research on selective leakage protection of 10 kV system based on transient characteristic parameters in coal mine

Meikuang Anquan, 2022
When a single-phase grounding fault occurs in the coal mine 10 kV power supply system, due to the low sampling frequency of the system, the traditional transient line selection method is easy to lose the “line selection information”, and is greatly ...
GUO Runshou, CAO Jiyuan
doaj   +1 more source

Fast single-end line protection method for the meshed multi-terminal HVDC grid

The Journal of Engineering, 2019
In view of the short-circuit fault characteristics, the protection technique of the dc lines limits the development of the modular multi-level converter (MMC)-based HVDC grid in a large extent. This study derives the calculation formulas of the transient
Qiang Huang, Guibin Zou, Chunhua Xu, Jie Zhang, Shuo Zhang   +4 more
doaj   +1 more source

Current situation and development trend of line selection method for single-phase grounding fault in mine power supply system

Meikuang Anquan
The mine power supply system usually adopts the neutral point ungrounded mode or the arc suppression coil grounded mode, due to the particularity and complexity of underground environment, the problem of single-phase grounding fault line selection has ...
Zhanshe YANG, Cheng ZHANG, Xiang RONG
doaj   +1 more source

Estimation of conditions of using combined single-track and double-track railways at high-speed traffic

MATEC Web of Conferences, 2018
An important condition when arranging high-speed railway transportation with insignificant traffic is saving of capital investments in construction of new lines or the reconstruction the existing ones. Development of methods for multi-criteria estimation
Dmitrenko Alexei, Karasev Sergei, Kalidova Alexandra, Sivitsky Dmitry   +3 more
doaj   +1 more source

Applicability study of single‐phase reclosing in tie line of photovoltaic power plant

IET Generation, Transmission & Distribution, 2021
Overhead transmission line faults are mostly single‐phase grounding faults, and to ensure the power supply reliability of photovoltaic power plants in the cases of tie line transient faults, a feasible solution is to employ the single‐phase reclosing ...
Kehan Xu, Zhe Zhang, Qinghua Lai, Xianggen Yin, Liu Wei   +4 more
doaj   +1 more source