Mechanistic Study of a Microwave Field-Controlled Static Crushing Agent for Efficient Rock Breaking. [PDF]
ACS Omega, 2022 Liu H +5 more
europepmc +1 more source
Atomically Resolved Acoustic Dynamics Coupled with Magnetic Order in a Van der Waals Antiferromagnet
Advanced Materials, EarlyView.Magnetically coupled acoustic phonon modes (f1, f2, f3) are captured by ultrafast X‐ray diffraction in a prototypical van der Waals antiferromagnet FePS3, including their atomic displacement vectors (u) and the acoustic propagation wave vectors (k). Notably, the atomic displacement vector and amplitude of these modes, represented by the direction and ...
Faran Zhou +24 more
wiley +1 more source
Cutting attitude inclination angle and rock-breaking mode characteristics of disc cutter
Meitan xuebaoThe identification of rock-breaking mode is a key basis to improve cutting ability, and the cutter cutting attitude has a significant influence on rock-breaking mode.
Chunsheng LIU +5 more
doaj +1 more source
Rock Breaking Efficiency Analysis of PDC Bit Based on Pointing Angle of Controllable Bent Sub
Shiyou jixie, 2021 In order to improve the rock breaking efficiency of the directional downhole closed-loop controllable bent sub, the ABAQUS software was used to conduct dynamic simulation analysis on the continuous sandstone breaking by the PDC bit under the pressurized ...
Zhang Guangwei +3 more
doaj
Anti‐Slip Material‐Based Strategies and Approaches
Advanced Materials Technologies, EarlyView.This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani +3 more
wiley +1 more source
Recent Advances in Variable‐Stiffness Robotic Systems Enabled by Phase‐Change Materials
Advanced Robotics Research, EarlyView.Phase‐change materials (PCMs), such as shape memory alloys, hydrogels, shape memory polymers, liquid crystal elastomers, and low‐melting‐point alloys, are driving advancements in stiffness‐tunable robotic systems across a wide range of applications. This review highlights recent progress in PCM‐enabled robotics, focusing on their underlying mechanisms,
Sukrit Gaira +5 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 +5 more
wiley +1 more source
Research Progress and Prospect on Laser Drilling Technology
Shiyou jixie, 2016 The conventional rotary drilling usually leads to drilling tool wear, which results in frequent drill bit replacement, causing long drilling period and high cost.The laser drilling technology could greatly improve the drilling speed and shorten the ...
Zhang Shiyi +4 more
doaj
The Mozambican Miner: A study in the export of labour [PDF]
, 1977 Marc Wuyts' copy of the Mozambican Miner report. A report on Mozambican miners produced by the Centro de Estudos Africanos at Universidade Eduardo Mondlane in Maputo, 1977.
First, Ruth
core
Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots
Advanced Robotics Research, EarlyView.This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou +4 more
wiley +1 more source