Results 21 to 30 of about 226,055 (310)

Discrete element method study on the percolation process of fine particles in ore drawing by the block caving method

工程科学学报, 2016
To explore the percolation regulation and inducement of waste fine particles in ore drawing by the block caving method, a simulation is undertaken by using discrete element method software EDEM.
LI Tao, WU Ai-xiang, HAN Bin, FENG Yun-tian, SUN Wei   +4 more
doaj   +1 more source

A Numerical Analysis of the Leakage Characteristics of an Embankment Dam Slope With Internal Erosion

Frontiers in Earth Science, 2022
Leakage is a common defect of embankment dam slopes, and is usually accompanied by internal erosion. This study establishes a mathematical two-phase seepage coupling model that explicitly considers the effects of internal erosion. With the help of finite
Yu Jia, Yu Ding, Xuan Wang, Xuan Wang, Jiasheng Zhang, Jiasheng Zhang, Xiaobin Chen, Xiaobin Chen   +7 more
doaj   +1 more source

Simulation of neutralization processes of Mg+ and Sr+ ions on Au surfaces using the time-dependent Schrödinger equation

Results in Surfaces and Interfaces
We investigated the high neutral fraction (NF) of Mg+ ions on Au surfaces through simulations based on solving the simultaneous differential equations derived from the time-dependent Schrödinger equation.
Shin-ichiro Kondo, Tatsushi Kondo, Atsushi Kondo, Masaki Kato, Kazuyoshi Yoshimura   +4 more
doaj   +1 more source

Magnetofluidization of Fine Magnetite Particles

AIP Conference Proceedings, 2009
In this study we investigate the behaviour of a fluidized bed of fine magnetite particles as affected by a crossflow uniform magnetic field. Due to the small particle size (35 microns), the fluidized system displays a typical Geldart A fluidization behaviour in the absence of an external field, i.e.
M. A. S. Quintanilla, M. J. Espin, J. M. Valverde, A. Castellanos, Masami Nakagawa, Stefan Luding   +5 more
openaire   +3 more sources

Traffic particles and occurrence of acute myocardial infarction: a case-control analysis. [PDF]

, 2009
OBJECTIVES: We modelled exposure to traffic particles using a latent variable approach and investigated whether long-term exposure to traffic particles is associated with an increase in the occurrence of acute myocardial infarction (AMI) using data from ...
Schwartz, Joel, von Klot, S., Schwartz, J, Melly, S., Mittleman, M., Goldberg, R, Schwartz, J., Mittleman, Murray A., Goldberg, Robert J., Tonne, C, von Klot, S, Gryparis, A, Gryparis, A., Yanosky, J., Gryparis, Alexandros, Yanosky, Jeffrey, Melly, Steven J., Tonne, C., Mittleman, M, Yanosky, J, Melly, S, Tonne, Cathryn, von Klot, Stephanie, Goldberg, R.   +23 more
core   +1 more source

Study on Two-Phase Fluid-Solid Coupling Characteristics in Saturated Zone of Subgrade Considering the Effects of Fine Particles Migration

Applied Sciences, 2020
The fluid seepage in saturated zone of subgrade promotes the migration of fine particles in the filler, resulting in the change of pore structure and morphology of the filler and the deformation of solid skeleton, which affects the fluid seepage ...
Yu Ding, Jia-sheng Zhang, Yu Jia, Xiao-bin Chen, Xuan Wang, Fei Meng   +5 more
doaj   +1 more source

The ubiquitin‐proteasome system and autophagy as guardians of the cellular proteome

FEBS Letters, EarlyView.
This Perspective covers the three principles governing the crosstalk between the ubiquitin‐proteasome system and autophagy in cellular proteostasis: (1) a shared ubiquitin code routing substrates via shuttle factors or autophagy receptors; (2) spatial compartmentalization into phase‐separated degradation hubs and organelle‐specific modules (exemplified
Ivan Dikic
wiley   +1 more source

Production Practice to Improve the Flotation Process Index of Shuiyindong Gold Mine in Guizhou Province

Kuangchan zonghe liyong, 2022
The gold ore of Shuiyindong Gold Mine in Guizhou province is a micro-fine disseminated refractory gold ore, which contains gold-bearing minerals such as pyrite and arsenopyrite with fine particle size and a large number of gangue minerals that are easy ...
Junning Yan
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Dynamics Of Fine Particles In Liquid-Solid Fluidized Beds

, 2007
On the basis of the Local Equilibrium Model (LEM), fine particles with large Richardson-Zaki exponent n show, under certain conditions during bed expansion and collapse, different dynamic behavior from particles with small n.
Liu DY(刘大有), Liu, DY (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China., Fu YF(傅源方)   +2 more
core   +1 more source