Results 61 to 70 of about 3,841 (276)

Theory and technologies for targeted precision-induced modification in non-explosive mechanized continuous mining of deep hard rock

工程科学学报
This study focuses on addressing three major challenges encountered in the mining of deep hard rock ore bodies: difficulty in real-time in situ perception of ore-rock characteristics, unclear mechanism of precision-induced modification of deep hard rock ...
Shaofeng WANG, Liwei SHI, Xinlei SHI, Kun DU, Zilong ZHOU   +4 more
doaj   +1 more source

Particle jet impact deep-rock in rotary drilling: Failure process and lab experiment.

PLoS ONE, 2021
Aimed at the technical problems of low drilling speed and difficult rock-breaking in deep-well and hard rock-stratum, particle waterjet coupled impact rock-breaking technology in rotary drilling is put forward in this paper.
Tiancheng Fang, Fushen Ren, Baojin Wang, Jianxun Cheng, Hanxu Liu   +4 more
doaj   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

The Modelling of Rock Fragmentation Mechanisms by Carbide Buttons Using the 3D Discrete Element Method

Applied Sciences, 2023
Button cutters are commonly used in hard rock drilling because the inserted carbide buttons provide exceptional wear resistance, impact resistance, and high strength in challenging geological formations.
Yanan Ma, Qiuming Gong, Xiaoxiong Zhou, Lijun Yin, Hongsu Ma   +4 more
doaj   +1 more source

Interfacial Failure and Self‐Healing in Solid‐State Batteries

Advanced Materials, EarlyView.
Dynamic interfacial self‐healing offers an adaptive route to mitigate coupled mechanical, chemical, and electrochemical degradation in solid‐state batteries. This review connects evolving interfacial failure mechanisms with physical‐flow, chemical‐restoration, stimuli‐responsive, and electric‐field‐assisted repair strategies, highlighting targeted self‐
Xinxin Zhu, Tengfei Dai, Wendi Dou, Zhiheng Li, Kaihua Wen, Yanqun Lv, Ming Zhao, Jun Lu, Zaiping Guo   +8 more
wiley   +1 more source

Study on Mine Earthquakes Mechanism and Ground Vertical Well Hydraulic Fracturing Shock Absorption in Thick Hard Rock Mine [PDF]

, 2023
Mine earthquakes are serious disasters in coal mines, especially in extremely thick hard strata. This study investigates the occurrence mechanism of fracture-type mine earthquakes in thick hard strata.
Xiaoguang Shang, Sitao Zhu, Chao Wang, Bo Xu, Jinhai Liu, Xiufeng Zhang, Xiang Sun, Xiaocheng Qu, Fuxing Jiang, Yang Chen, Jiajie Li   +10 more
core   +1 more source

Numerical Simulation on Impact Crushing of Hard Rock by PDC Bit Based on Cohesive Element

Shiyou jixie
The rock of deep oil and gas reservoir has high hardness， and the drilling efficiency of PDC bit is low under conventional drilling mode. Impact drilling performs well in crushing hard rock， but the damage mechanism of PDC bit crushing hard rock under ...
Gao Feng, Shi Huaizhong, Huang Zhongwei, He Wenhao, Xiong Chao, Fu Xinkang   +5 more
doaj   +3 more sources

Progress on the Failure Mechanisms and Optimization Strategies on Lithium Iron Phosphate

Advanced Materials Interfaces, EarlyView.
This review centers on LiFeO4 cathodes, outlining their core advantages and performance limitations, then systematically elucidating failure mechanisms, proposing key optimization strategies, and summarizing future research directions that integrate advanced characterization with intelligent design.
Zheng‐Xin Qian, Tianxiang Li, Zhijiang Liu, Mingzhe Yuan, Xiaoyu Gu, Banglong Wan, Qian Zhao, Zuotong Zha, Hang Ma   +8 more
wiley   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Muscle Control of an Extra Robotic Digit

Advanced Robotics Research, EarlyView.
This study compares muscle‐ and movement‐based control for operating a supernumerary robotic thumb. While movement control performs better in the proposed tasks, muscle‐based (EMG) control promotes broader motor learning. The results highlight the promise and challenges of using biosignals for human augmentation, offering new insights into intuitive ...
Julien Russ, Lucy Dowdall, Francesco Cenciarelli, Kitty Goodridge, Mabel Ziman, Hristo Dimitrov, Danielle Clode, Tamar R. Makin   +7 more
wiley   +1 more source