Results 21 to 30 of about 2,039 (219)

Research on laser positioning matrix of straightness detection robot for hydraulic support

Gong-kuang zidonghua, 2019
For straightness detection of hydraulic support in unmanned working face of coal mine underground, an attitude and straightness detection model of hydraulic support was proposed.
YANG Xuejun, WANG Ranfeng, WANG Huaifa
doaj   +1 more source

Innovation and future of mining rock mechanics

Journal of Rock Mechanics and Geotechnical Engineering, 2021
The 121 mining method of longwall mining first proposed in England has been widely used around the world. This method requires excavation of two mining roadways and reservation of one coal pillar to mine one working face.
Manchao He, Qi Wang, Qunying Wu
doaj   +1 more source

Research on dynamic characteristics of large deformation shearer cable based on absolute node coordinate formulation method.

PLoS ONE, 2023
The development of intelligent and unmanned coal mining has put forward higher requirements on the service life and dynamic reliability of shearer cables.
Lijuan Zhao, Haining Zhang, Feng Gao, Liguo Han, Man Ge   +4 more
doaj   +1 more source

Radio-Controlled Intelligent UGV as a Spy Robot with Laser Targeting for Military Purposes

Axioms, 2023
The main objective of this unmanned ground vehicle is to deal with the security issues like terrorist activities across the border and in various remote combat missions by reducing the involvement of soldiers.
Muhammad Zia Ur Rahman, Umair Raza, Muhammad Azeem Akbar, Muhammad Tanveer Riaz, Abdu H. Gumaei, Nasir Ahmad   +5 more
doaj   +1 more source

Type characteristics and research direction of automatic bolting frame

Meitan kexue jishu, 2023
Bolt support ability is one of the bottleneck problems that restrict the speed and safety of roadway excavation, as well as the development of unmanned and intelligent roadway excavation.
GAO Zhiqiang, GUO Zhifu
doaj   +1 more source

Error Compensation of Strapdown Inertial Navigation System for the Boom-Type Roadheader under Complex Vibration

Axioms, 2021
The strapdown inertial navigation system can provide the navigation information for the boom-type roadheader in the unmanned roadway tunneling working face of the coal mine.
Yang Shen, Pengjiang Wang, Weixiong Zheng, Xiaodong Ji, Hai Jiang, Miao Wu   +5 more
doaj   +1 more source

Intelligent shearer cutting control based on process driven technology

Gong-kuang zidonghua
The traditional shearer cutting control lacks analysis of the state of the shearer drum, resulting in low quality of cutting template generation. It does not fully consider the undulation of the working face and geological environmental conditions, which
ZHENG Chuang, LI Danning, FENG Yinhui
doaj   +1 more source

Advancing unmanned roadheader-based tunneling: a framework for challenging underground environments

Geo-spatial Information Science
Unmanned roadheader-based tunneling in complex underground environments represents a significant advancement in mining technology, offering the potential to enhance safety and efficiency, but it poses considerable challenges in terms of precise control ...
Changqing Yan, Gang Zhao, Shengzhe Hou, Xinming Lu   +3 more
doaj   +1 more source

Mechanisms of Degradation in Li‐Ion Batteries Under Low Temperature Exposures

Advanced Functional Materials, EarlyView.
Low‐temperature exposures, or freeze‐thaw cycles, are observed to significantly accelerate the degradation of Li‐ion batteries. A combination of electrolyte phase separation and mechanochemical stress leads to reversible and irreversible performance losses.
Mihir Ojha, Shervin Alaei, Jayanth Ramamurthy, Luke P. Lounsbury, Md Mahdi Ul Ishtiaque, Stuart Leland, Niraj P. Atale, Sourav Das, Siddhartha Pathak, Pranav Shrotriya, Steve W. Martin, Todd A. Kingston, Cary L. Pint   +12 more
wiley   +1 more source

Space‐Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping

Advanced Materials, EarlyView.
Space‐time coding conformal metasurfaces enable dynamic wave control on curved surfaces by combining programmable spatial patterns with temporal modulation. This study shows that a single conformal aperture can independently manipulate multiple frequency components, achieving multifunctional beam shaping and steering, with implications for ...
Filippo Pepe, Lei Zhang, Yi Ning Zheng, Xiao Qing Chen, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Tie Jun Cui, Vincenzo Galdi   +8 more
wiley   +1 more source