Results 1 to 10 of about 1,871,440 (296)

In-service automatic welding technology for high-grade large-diameter oil and gas pipelines

You-qi chuyun, 2021
As more long-distance oil and gas pipelines with high pressure, large diameter, high steel grade and large wall thickness are constructed, the wall of the fittings such as the hot tapping tees and the repair sleeves that are involved in the in-service ...
Juan CHEN, Jin SONG, Yue ZHANG, Xuebin LIU, Liangtao TAN, Jinshui ZHAO, Shepeng CHEN, Zhiming JIN   +7 more
doaj   +1 more source

Calculation and Analysis of Vibration Stress of Guangxi Nanning Subway during Operation

Advances in Civil Engineering, 2022
In this study, based on the Mindlin solution in elastic half-space, the stress calculation formula was determined with consideration of any point in the foundation under the dynamic amplification effect.
Zhenchao Chang, Junhui Luo, Shihai Wang, Haifeng Huang, Peng Mo, Chunwei Wu, Laixing Liao, Yuanpeng Chen, Mian Huang, Yuhang Wu   +9 more
doaj   +1 more source

Research progress of laser additive repair technology for military aircraft metal parts

Journal of Aeronautical Materials, 2023
Laser additive repair technology is suitable to repair the metal parts of military aircraft. It is an important thrust to prolong the flight service life and improve the ability of independent maintenance.
XU Jinjun, ZHANG Hao, GAO Dexi, ZHAN Yang, JIANG Mang, GAO Kun, ZENG Quansheng   +6 more
doaj   +1 more source

Fault Path Direct-Current Resistance Based Off-Line Single-Phase-To-Ground Fault Location

Zhongguo dianli, 2021
In order to figure out the off-line transmission line fault location, a new fault location method based on fault path direct current resistance measurement is proposed.
Fuzhi LI, Weibin ZHENG, Wenhai ZHANG, Zhiyong ZHANG, Defeng LIN, Xubo ZHANG, Rongjian ZHANG   +6 more
doaj   +1 more source

Physical, Rheological, And Microsurface Characteristics of High-Viscosity Binder Modified with WMA Agents

Advances in Materials Science and Engineering, 2022
In order to investigate the feasibility of warm mix technology in high-viscosity asphalt mixes, in the current experiment, Shell 70 Grade A asphalt (base asphalt) was modified by AR-HVA (a high-viscosity modifier), and the high-viscosity modified asphalt
Junhui Luo, Yuzhu Yang, Weirong Huang, Cheng Xie, Jiangcai Chen, Haobin Liu, Tianzeng Ren, Xiaofeng Huang   +7 more
doaj   +1 more source

Research on Beidou and GPS dual satellite positioning algorithms for substation site positioning

International Journal of Metrology and Quality Engineering, 2020
With the rapid development of global satellite navigation system technology, multi-mode satellite navigation positioning technology that can be compatible with multiple navigation systems at the same time is bound to become the future development trend ...
Feng Junjie, Shi Junfeng, Gao Lei, Huang Hongwei   +3 more
doaj   +1 more source

Failure Mode Analysis and Maintenance of Railway Overhead Line Rigid Stainless Steel Droppers and Multi-Strand Copper Jumpers

IET Electrical Systems in Transportation, 2023
Droppers and jumpers are important components of railway overhead line electrification. Their effective maintenance is critical for the railway’s safe and reliable operation; the consequences of their failure can be disproportionally serious.
Jingyu Du, Jian-Ping Li, George Chaplin, Andrew Gardiner, Fun-Yim Hu   +4 more
doaj   +1 more source

Proposal of the prediction method for fatigue strength of corroded rails with pitting corrosion by actual stress and stress gradient

Nihon Kikai Gakkai ronbunshu, 2023
Rail corrosion is one of the causes of rail breaks. The relationship between rail corrosion state and fatigue strength is still unclear. Therefore, to accurately estimate the fatigue strength of corroded rails, the prediction method for fatigue strength ...
Jun MIZUTANI, Mitsuru HOSODA, Ryuichi YAMAMOTO, Yoshihiro TERASHITA   +3 more
doaj   +1 more source

Date Palm Fiber-Reinforced Recycled Polymer Composites: Synthesis and Characterization

Advances in Polymer Technology, 2022
In this research study, Recycled Polymer (RP) composites are synthesized by using compression molding process, initial mixtures of RP and Date Palm Fibers (DPF) with four different lengths (e.g., 2.5, 5, 7.5, and 10 mm) and weight ratios (e.g., 5, 10, 15,
Malek Ali, Anwar H. Al-Assaf, Mohammad Salah   +2 more
doaj   +1 more source

Australia’s novel approach to chloride extraction [PDF]

MATEC Web of Conferences
A driving factor of concrete marine structure service life in Australia is the presence and ingress of chlorides into concrete cover which can ultimately initiate corrosion of the steel reinforcement.
Critchley Nicholas, McGuiness Blane, Palmer Troy   +2 more
doaj   +1 more source