Results 71 to 80 of about 905,932 (309)
The response mechanism and testing method of the rock elastic modulus while drilling
Geomatics, Natural Hazards & RiskThe elastic modulus is a basic parameter reflecting the deformation resistance and energy concentration characteristics of rock. The traditional testing method of the rock elastic modulus needs to core the surrounding rock and testing it in the ...
Bei Jiang +7 more
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Записки Горного института, 2019 Compliance with drilling operations requirements is achieved by introducing advanced approaches to the management of the drilling process. Main requirement is to reduce the time and material costs for construction of the well.
V. V. Neskoromnykh, M. S. Popova
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Gallium Nitride Semiconductor Resonant Tunneling Transistor
Advanced Science, EarlyView.Three‐terminal GaN semiconductor resonant tunneling transistors (RTTs), which comprise an double‐barrier AlN/GaN/AlN resonant tunneling diode integrated with a GaN high‐electron‐mobility transistor (HEMT) through epitaxial growth in series and parallel configuraions, respectively.
Fang Liu +15 more
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Energy Reports, 2020 Rate of penetration (ROP) is affected by many factors (i.e. rock properties, drilling parameters), and the increase of ROP is required to meet the needs of modern drilling operations.
Heng Zhang +4 more
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Advanced Science, EarlyView.A schematic diagram of the mechanism where small extracellular vesicles mediate the enhancement of heterotopic wound healing by radial extracorporeal shockwave stimulation at a proximal tibial osteotomy site. ABSTRACT Wound healing represents a complex biological process necessitating innovative therapeutic approaches, particularly for chronic wounds ...
Xiaoping Xie +8 more
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Research on the Step Drilling System for Water Jet Radial Drilling
Shiyou jixie, 2021 The low traction force of the front-end nozzle for water jet radial drilling limits the drilling distance. The ground run drilling method has complex force transmission, large run-in-hole fluctuation, and has difficulty in the ground precise control of ...
Chen Zhi +5 more
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Compartmentalized Homeostasis Drives High Bamboo Forest Productivity under Nutrient Imbalance
Advanced Science, EarlyView.This study reveals how Moso bamboo achieves high productivity despite nutrient‐poor soils. It employs a unique strategy, maintaining strict nutrient balance in its leaves while using woody tissues as flexible storage reservoirs. This compartmentalized mechanism buffers the plant from soil phosphorus limitation and microbial competition, resolving the ...
Zhikang Wang +13 more
wiley +1 more source
Non‐Equilibrium Synthesis Methods to Create Metastable and High‐Entropy Nanomaterials
Advanced Science, EarlyView.ABSTRACT Stabilizing multiple elements within a single phase enables the creation of advanced materials with exceptional properties arising from their complex composition. However, under equilibrium conditions, the Hume–Rothery rules impose strict limitations on solid‐state miscibility, restricting combinations of elements with mismatched crystal ...
Shuo Liu +3 more
wiley +1 more source
Advanced Energy Materials, EarlyView.The densification process of Li6PS5Cl powders with varying particles size distributions reveals differences in smaller and larger distributions. Higher strain is revealed for the smaller particle size distribution from X‐ray diffraction. Discrete element method simulations uncover that the reason for the higher strain is not the particle size itself ...
Vasiliki Faka +14 more
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An Enhanced Positional Error Compensation Method for Rock Drilling Robots Based on LightGBM and RBFN. [PDF]
Front Neurorobot, 2022 Zhou X +6 more
europepmc +1 more source