Results 21 to 30 of about 2,591,056 (296)

Mechanical characteristics and energy evolution law of sandstone failure process under post-peak cold and heat cycle

Meikuang Anquan, 2023
In coal fire control, grouting/water extinguishing is often repeated for reasons such as re-ignition. The surrounding rock undergoes repeated heating and water cooling, resulting in strength reduction and damage, and collapse and cracks on the extended ...
QI Huaiyuan, WANG Jianwei
doaj   +1 more source

Uniaxial compression failure and energy dissipation of marble specimens with flaws at the end surface

工程科学学报, 2020
It is a fact that a large number of defects such as cracks, voids, inclusions, weak planes, and joint sets are generated within the rock mass during the process of rock formation because of geological-tectonic evolution.
Zhen-yu HAN, Di-yuan LI, Quan-qi ZHU, Meng LIU, Xi-bing LI   +4 more
doaj   +1 more source

Energy Evolution and Acoustic Emission Characteristics of Uniaxial Compression Failure of Anchored Layered Sandstone

Frontiers in Earth Science, 2022
To study the energy evolution and acoustic emission characteristics of layered sandstone under anchorage in the process of deformation and failure, the sandstone samples from Chuxiong Yi Autonomous Prefecture, Yunnan Province were selected for uniaxial ...
Yang Yu, Da-Cheng Zhao, Guang-Liang Feng, Guang-Liang Feng, Da-Xin Geng, Hao-Sen Guo   +5 more
doaj   +1 more source

On Neutral Absorption and Spectral Evolution in X-ray Binaries [PDF]

, 2009
Current X-ray observatories make it possible to follow the evolution of transient and variable X-ray binaries across a broad range in luminosity and source behavior.
Arnaud, Bradley, Caballero-Garcia, Cackett, Cackett, Cackett, E. M. Cackett, Esin, Feng, Hanke, Homan, Houck, Hynes, J. M. Miller, Juett, Juett, Kalemci, Lee, Miller, Miller, Miller, Miller, Miller, Narayan, Paerels, Park, R. C. Reis, Rykoff, Schulz, Schulz, Schulz, Sobczak, Torres, Yao   +33 more
core   +3 more sources

Experimental study on triaxial mechanics and failure characteristics of shale in different brine environments

Yantu gongcheng xuebao, 2023
Shale is an ideal caprock for carbon dioxide sequestration projects in deep saline aquifers. Different brine solutions and confining pressures have a significant effect on the mechanical behaviors of caprock shale, which also affects the safety and ...
YANG Shengqi 1, 2, HONG Wangxing 2, SUN Bowen 2, TANG Xuhai 3
doaj   +1 more source

An Evolution Based on Various Energy Strategies [PDF]

Entropy, 2021
The simplest model of the evolution of agents with different energy strategies is considered. The model is based on the most general thermodynamic ideas and includes the procedures for selection, inheritance, and variability. The problem of finding a universal strategy (principle) as a selection of possible competing strategies is solved.
Alexander O. Gusev, Leonid M. Martyushev
openaire   +3 more sources

Information entropy and dark energy evolution

, 2017
The information entropy is here investigated in the context of early and late cosmology under the hypothesis that distinct phases of universe evolution are entangled between them. The approach is based on the \emph{entangled state ansatz}, representing a
Capozziello, Salvatore, Luongo, Orlando
core   +1 more source

Experimental Study on Mechanical Deformation and Energy Evolution of Deep Coal Under Complex Stress Paths

Applied Sciences
This study proposes a novel cyclic stress path with simultaneous axial and confining stress and conducts triaxial testing on raw coal over various cycle periods.
Yue Jiang, Xingfeng Mao, Dongming Zhang, Xiang Yang   +3 more
doaj   +1 more source

Study on in-situ mechanical response and energy evolution law of water-immersed mudstone

Meikuang Anquan
To investigate the mechanical properties and energy evolution mechanism of water-immersed mudstone under complex in-situ stress conditions, we selected the floor mudstone in Yitang Coal Mine as the research object and conducted triaxial compression tests
Chenhong PAN, Xiaoqiang ZHANG, Yulong JIANG, Kai WANG, Jian HOU, Jixin CHEN, Wenwei WANG   +6 more
doaj   +1 more source

On the self-similarity of nonhelical magnetohydrodynamic turbulence [PDF]

, 2016
We re-analyze the Olesen arguments on the self-similarity properties of freely evolving, nonhelical magnetohydrodynamic turbulence. We find that a necessary and sufficient condition for the kinetic and magnetic energy spectra to evolve self-similarly is ...
Campanelli, Leonardo
core   +2 more sources