Results 11 to 20 of about 282,083 (266)
矿业科学学报, 2021 In order to master the fire-extinguishing efficiency of different concentrations of CO2 on the oxidized coal re-combustion, a self-developed coal spontaneous oxidation program temperature increasing experimental device was adopted to study the inhibitory
Guo Zhiguo +4 more
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Influence of fracturing scale of CBM vertical well on typical indexes of drainage and mining
Meikuang Anquan, 2021 Taking CBM wells in a block of Qinshui Basin as an example, through analyzing the typical drainage and mining index of CBM well, this paper studies the influence of fracturing scale on drainage and mining index, and probes into the mechanism of the ...
LI Quanzhong, NI Xiaoming, HU Haiyang
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ON ARITHMETIC-GEOMETRIC INDEX (GA) AND EDGE GA INDEX
TWMS Journal of Applied and Engineering Mathematics, 2018 Let G(V (G), E(G)) be a simple connected graph and dG(u) be the degree of the vertex u. Topological indices are numerical parameters of a graph which are invariant under graph isomorphisms. Recently, people are studying various topological measures such as the arithmetic-geometric index and the edge version of arithmeticgeometric index of a graph G ...
V.AYTAÇ, -, T.TURACI, -
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Journal of Natural Gas Geoscience, 2023 Multi-layer commingled production is the main feature of gas well development in Sulige tight sandstone gas reservoir, Ordos Basin. Identifying potential interference between layers and devising methods for their characterization are crucial ...
Huaxun Liu +7 more
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Gong-kuang zidonghua, 2019 Most researches on coal spontaneous combustion characteristics under different oxygen concentration only consider different oxygen nitrogen ratio atmosphere, but low temperature oxidation law of coal under different methane atmospheres is seldom studied.
HAO Yu, YE Zhengliang
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Meikuang Anquan, 2020 To solve the sign problem of coal spontaneous combustion in the mining operation of 1308 working face in Guojiahe Coal Mine, the characteristic parameters of coal spontaneous combustion are analyzed by the on-site coal sampling experiment, CO and C2H4 ...
XING Lijie, LIU Fen, JIN Yan, SONG Yushan, GUO Jun
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Gong-kuang zidonghua, 2018 In view of problem of natural fire on 1078 working face of Qingdong Coal Mine, through a combination of laboratory research and on—site testing, the main and auxiliary indicators of spontaneous combustion index gases were optimized: CO and C2H4 can be ...
SUN Liutao, DUAN Yujian, HUANG Junze
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Gong-kuang zidonghua, 2019 In view of goaf spontaneous combustion prevention of 12401 fully mechanized working face with large mining height in Shangwan Coal Mine, CO is determined as prediction index gas of coal spontaneous combustion and C2H4 is used as auxiliary index gas to ...
QU Shijia +3 more
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Fintech Index Prediction Based on RF‐GA‐DNN Algorithm [PDF]
Wireless Communications and Mobile Computing, 2021 The Fintech index has been more active in the stock market with the Fintech industry expanding. The prediction of the Fintech index is significant as it is capable of instructing investors to avoid risks and provide guidance for financial regulators.
Chao Liu, Yixin Fan, Xiangyu Zhu
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Research on the construction of a natural gas price index in China
Energy Strategy Reviews, 2020 A natural gas price index (NGPI) can be used by stakeholders to comprehensively evaluate the natural gas market. At present, there is no NGPI to measure the volatility of China's entire natural gas market.
Xinlei Yang +4 more
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