Results 61 to 70 of about 10,541 (260)
Advanced Science, EarlyView.A stable Ti3C2Clx/Ti3ZnC2 heterostructure, fabricated by dynamic etching, exhibits outstanding electrocatalytic NRR activity (NH3 yield: 20.1 µg h−1 mg−1, FE: 38.1%) in alkaline media. The corresponding Zn‐N2 battery achieves a peak power density of 36.5 µW cm−2 and an NH3 yield of 13.1 µg h−1 mg−1, providing an advanced strategy for NH3 and ...
Yu Wang +9 more
wiley +1 more source
An Experimental and Numerical Simulation Study on Rock Cutting Based on Pre-Breaking
Shiyou jixie, 2019 The design of the mixed-cutter placement can only rely on the engineering experience. The combination of experiment and numerical simulation is used to study the rock breaking force and rock breaking efficiency of the PDC cutter under different pre ...
Liu Zhong, Hou Huihui, Hu Wei
doaj
The rock cutting simulation of heterogeneous granite using FDEM method
PetroleumMany advanced rock breaking methods are emerged form improving the ROP in deep formation drilling in recent years, such as electric pulse rock breaking, ultrasonic rock breaking and hydraulic rock breaking.
Weiji Liu +4 more
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Iconography in Bradshawb rock art: breaking the circularity [PDF]
Clinical and Experimental Optometry, 2011 Interpreting the symbols found in the rock art of an extinct culture is hampered by the fact that such symbols are culturally determined. How does one break the circularity inherent in the fact that the knowledge of both the symbols and the culture comes from the same source?
openaire +3 more sources
Advanced Science, EarlyView.Magnetoelectric nanoparticles (MENPs) enable fully wireless, minutely invasive neuromodulation, and potentially neural recording, by converting magnetic into electric and, conversely, electric into magnetic fields, respectively, at high spatiotemporal resolution.
Elric Zhang +14 more
wiley +1 more source
IEEE Access, 2019 As an important equipment for wellbore construction, the raise boring machine (RBM) has been widely used in subway tunnels and mine construction projects.
Xiukun Hu +4 more
doaj +1 more source
Advanced Science, EarlyView.Leveraging the multidimensional self‐catalytic merits of the alkali‐polyphenol synergistic self‐catalytic platform, this work delineates the intrinsic mechanism governing the regulation of hydrogel properties and puts forward an innovative design paradigm for frost‐tolerant electrode materials, providing critical scientific insights and technical ...
Mengting Zhou +10 more
wiley +1 more source
Efficient 3D Visual Perception for Robotic Rock Breaking
2019 IEEE 15th International Conference on Automation Science and Engineering (CASE), 2019 In recent years, underground mining automation (e.g., the heavy-duty robots carrying rock breaker tools for secondary breaking) has drawn substantial interest. This breaking process is needed only when over-sized rocks threaten to jam the mine material flow.
Niu, Longchuan +3 more
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Unsaturated Coordination Oxygen in Zn─V─O Vacancy Clusters Enables Superb Zinc Storage Capability
Advanced Science, EarlyView.Zn3(VO4)2 with Zn─V─O vacancy clusters was synthesized and innovatively applied as cathode material in aqueous Zn‐ion batteries. In‐situ XRD, HRTEM and ab initio molecular dynamics simulations unveil the double reaction mechanism of zinc ions. Adsorption of zinc ions on unsaturated coordination O and H+ on O in ‐VO4 contributes to the main capacity. It
Yulong Chi +8 more
wiley +1 more source
Advanced Science, EarlyView.This review summarizes recent advances in four mainstream solution‐based techniques for synthesizing NiOx hole‐transport layers for high‐performance perovskite photovoltaic cells, and highlights the key challenges and future prospects for achieving high efficiency, long‐term stability, and low‐cost perovskite photovoltaic technologies toward ...
Zheng Wu +7 more
wiley +1 more source