Results 41 to 50 of about 24,392 (174)

Hadron structure after 25 years of QCD [PDF]

, 2000
We briefly review the status of our understanding of hadron structure based on QCD. This includes the role of symmetries, especially chiral symmetry, and the insights provided by lattice QCD.
Thomas, A. W.
core   +2 more sources

Primary geological characteristics, advances in exploration and production, and strategies of coalbed methane in South China

Meitian dizhi yu kantan
Objective and Methods South China contains abundant coalbed methane (CBM) resources from numerous, superimposed, thin coal seams, serving as a significant replacement for China’s CBM exploration and production in the future.
Tao GUO, Yatong ZHOU, Xiaobo JIN, Xiaokang GAO, Xingping PENG   +4 more
doaj   +1 more source

Effect of disorder on transport properties in a tight-binding model for lead halide perovskites

, 2017
The hybrid organic-inorganic lead halide perovskite materials have emerged as remarkable materials for photovoltaic applications. Their strengths include good electric transport properties in spite of the disorder inherent in them.
Ashhab, S., Hoogland, S., Madjet, M. E., Sargent, E. H., Voznyy, O.   +4 more
core   +1 more source

Main controlling factors of production and reasonable fracturing scale optimization of deep coalbed methane wells in Shenfu block, Ordos Basin

Shiyou shiyan dizhi
The production of deep coalbed methane (CBM) wells in the Shenfu block of Ordos Basin varies greatly, with a lack of understanding of the main controlling factors.
Lichun SUN, Jia LIU, Na LI, Xinze LI, Heng WEN   +4 more
doaj   +1 more source

Reflections and implementation strategies for constructing a standard system for deep coalbed methane exploration and exploitation

Meitian dizhi yu kantan
ObjectiveDeep coalbed methane (CBM; burial depths: > 1500 m) in China holds considerable resource potential. As a strategic clean energy, deep CBM is exhibiting increasingly high value of exploitation and utilization.
Xinjun CHEN, Zengqin LIU, Baojian SHEN, Shihu ZHAO, Jiaqi ZHANG, Jincheng YE   +5 more
doaj   +1 more source

Ab Initio Study of Phase Stability in Doped TiO2

, 2012
Ab-initio density functional theory (DFT) calculations of the relative stability of anatase and rutile polymorphs of TiO2 were carried using all-electron atomic orbitals methods with local density approximation (LDA).
Assadi, Mohammed H. N., Hanaor, Dorian A. H., Li, Sean, Sorrell, Charles C., Yu, Aibing   +4 more
core   +1 more source

Differences in gas-bearing properties of deep and shallow coal reservoirs and their implications for coalbed methane production in the western section of the southern margin of the Junggar Basin, Xinjiang

Meitian dizhi yu kantan
BackgroundIn recent years, breakthroughs have been constantly achieved in the production of coalbed methane (CBM) at burial depths exceeding 2 000 m in China, with the gas-bearing properties of coal reservoirs identified as a primary geological parameter
Julei MI, Changyong ZHAO, Zhaobiao YANG, Pengli WANG, Erting LI, Baoxin ZHANG, Haifeng BAI, Xiuwei GAO, Jianan WANG   +8 more
doaj   +1 more source

Geological steering technology for directional drilling of deep CBM horizontal wells in Qinshui Basin

Meikuang Anquan, 2023
The geological structure of the deep coal seam in Qinshui Basin is relatively complex, which poses a new challenge to the control of the directional landing site of the horizontal well and the control of the drilling trajectory of the horizontal section, and the traditional methods based on the geological characteristics data and lithology of the ...
openaire   +1 more source

Equivalent Modeling and Simulation of Fracture Propagation in Deep Coalbed Methane

Energies
Deep coalbed methane (CBM) is challenging to develop due to considerable burial depth, high ground stress, and complex geological structures. However, modeling deep CBM in complex formations and setting reasonable simulation parameters to obtain ...
Cong Xiao, Jiayuan He, Lin Meng, Rusheng Zhang, Dong Xiong   +4 more
doaj   +1 more source

Intrinsic Defects and Electronic Conductivity of TaON: First-Principles Insights

, 2011
As a compound in between the tantalum oxide and nitride, the tantalum oxynitride TaON is expected to combine their advantages and act as an efficient visible-light-driven photocatalyst.
Chen, Shiyou, Wang, Lin-Wang
core   +1 more source