Results 71 to 80 of about 337,035 (306)

Control of surface movement and deformation during coordinated mining of large dip coal seams

Meikuang Anquan
In order to achieve the goal of reducing surface damage during coordinated mining of large dip (inclined) coal seams, taking the occurrence conditions of coal seams in a certain mine in Gansu Province as the background, UDEC numerical simulation software
Lijun GAO, Bin FENG, Fadong JIN
doaj   +1 more source

Influence of Strip-Mining on the Mortality of a Wetland Caddisfly, \u3ci\u3eLimnephilus Indivisus\u3c/i\u3e (Trichoptera: Limnephilidae). [PDF]

, 2017
A coal mine about 2.2 km upstream from Stillfork Swamp Nature Preserve, Carroll Co., Ohio was suspected of causing a reduction in Limnephilus indivisus caddisflies in the south half of the preserve. Second instar L.
Foote, B. A, Usis, J. D
core   +2 more sources

Liquid Bismuth Catalyst Enables High‐CO‐Selectivity in CO2 Hydrogenation

Advanced Science, EarlyView.
This work introduces a dynamic liquid bismuth catalyst for efficient CO2‐to‐syngas conversion. Stabilized molten Bi nanodroplets on a defective VOx support enable a reversible Bi3+/Bi0 redox cycle at moderate temperatures. Mechanistic insights reveal that Ni‐Bi dual sites synergistically activate H2 and cleave CO2, leading to high CO selectivity ...
Xinxin Lu, Zun Guan, Xinyi Fu, Bin Chen, Zhongliang Huang, Riguang Zhang, Guowu Zhan   +6 more
wiley   +1 more source

Coal-rock interface detector [PDF]

, 1979
A coal-rock interface detector is presented which employs a radioactive source and radiation sensor. The source and sensor are separately and independently suspended and positioned against a mine surface of hydraulic pistons, which are biased from an air
Crouch, C. E., Jones, E. W., Rose, S. D.
core   +1 more source

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

THE FOREST LAND RECLAMATION AFTER LIGNITE OPEN PIT MINING IN THE SOUTH OF UKRAINE [PDF]

, 2018
Lignite mining in Kropyvnytsky region has been performed in the last few decades in Alexandria district in the watershed of the two rivers (Ingulets and Beska). Semenovske - Golodkywske mine is the pit associated with
Kharytonov, Mykola, Masyuk, Oleksandr
core  

FeCoNiCuPt High‐Entropy Alloy Boosts Photocatalytic Hydrogen Production on Protonated Graphitic Carbon Nitride

Advanced Science, EarlyView.
In this study, FeCoNiCuPt high‐entropy alloy particles (HEA) are loaded onto protonated g‐C3N4 nanosheets (HCN NSs) to construct HEA/HCN composites through an electrostatic self‐assembly method. Protonation treatment enriches the surface of g‐C3N4 nanosheets with abundant active sites and enhances their interfacial charge separation capability ...
Yunzhu Zang, Jiali Ren, Yanjun Xue, Jian Tian   +3 more
wiley   +1 more source

Study on the Width of a Narrow Coal Pillar for Gob-Side Entry Driving near an Advancing Working Face in a Shallow Coal Seam

Energies
In response to the challenges of controlling surrounding rock deformation in gob-side entry driving towards the advancing working face, a systematic study on the stability of the headgate# 15107 and coal pillar section was conducted, using a combination ...
Hu Zhang, Yang Wen, Wenda Wu, Haipo Wen, Yaotong Hu, Bo Wang, Jianqiang Shao, Zhongwu Li, Jianchun Niu   +8 more
doaj   +1 more source

Robust and Thermally Stable Silicone Aerogels with Hyperconnected Network via Kinetically Optimized Hyperbranched Silane Precursors

Advanced Science, EarlyView.
Reactivity‐Programmed Assembly: A kinetic‐control strategy is reported for constructing hyperconnected silicone aerogels with a robust “thick‐neck” architecture. By exploiting the reactivity disparity of precursors, flexible segments are uniformly embedded within a rigid skeleton.
Aoqing Yan, Guixiang Li, Yaolan Li, Yi Luo, Bin Liu, Zhe Su, Hao Tian, Wei Shi, Bo Niu, Donghui Long   +9 more
wiley   +1 more source

A point cloud denoising method for unstructured roadways based on regional growth

Gong-kuang zidonghua
Currently, research on point cloud denoising in underground roadways has not fully met the special denoising needs of roadway point clouds. Especially in narrow, enclosed, and complex underground roadway environments, the research has not fully addressed
LIAN Zhongwen, REN Zhuli, HAO Yinghao, YANG Fan, BAI Gang, FANG Cheng, YUAN Ruifu   +6 more
doaj   +1 more source