scholarly journals Computer simulation of adsorption properties of polymer on surface under external driving force

2018 ◽  
Vol 67 (16) ◽  
pp. 168201
Author(s):  
Li Hong ◽  
Ai Qian-Wen ◽  
Wang Peng-Jun ◽  
Gao He-Bei ◽  
Cui Yi ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Driving Force ◽  
Adsorption Properties ◽  
External Driving

Molecular dynamics simulation studies on the plastic behaviors of an iron nanowire under torsion

RSC Advances ◽  
2016 ◽  
Vol 6 (34) ◽  
pp. 28792-28800 ◽  
Author(s):  
Chong Qiao ◽  
Yanli Zhou ◽  
Xiaolin Cai ◽  
Weiyang Yu ◽  
Bingjie Du ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Plastic Deformation ◽  
Molecular Dynamics Simulation ◽  
Deformation Mechanism ◽  
Driving Force ◽  
Dynamics Simulation ◽  
Simulation Studies ◽  
Plastic Deformation Mechanism ◽  
Constant Torsion ◽  
External Driving

The plastic deformation mechanism of iron (Fe) nanowires under torsion is studied using the molecular dynamics (MD) method by applying an external driving force at a constant torsion speed.

scholarly journals Interface Roughening with a Time-Varying External Driving Force

1993 ◽  
Vol 21 (4) ◽  
pp. 401-406 ◽  
Author(s):  
E Hernández-García ◽  
T Ala-Nissila ◽  
M Grant
Keyword(s):  
Driving Force ◽  
Time Varying ◽  
Interface Roughening ◽  
External Driving

The Adsorption Mechanism of Sodium Lignosulfonate on Al2O3 Particle in the Aqueous Solution

2012 ◽  
Vol 550-553 ◽  
pp. 1120-1123
Author(s):  
Rong Li ◽  
Dong Jie Yang ◽  
Wen Yuan Guo ◽  
Xue Qing Qiu
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bond ◽  
Driving Force ◽  
Adsorption Mechanism ◽  
Hydrophobic Interactions ◽  
Adsorption Properties ◽  
Sodium Lignosulfonate ◽  
Ph Values ◽  
Electrostatic And Hydrophobic Interactions ◽  
Monolayer Coverage

The adsorption properties of sodium lignosulfonate (SL) on Al2O3 particles under different pH values have been investigated. Results show that at low pHs, SL adsorbs on the Al2O3 particles in the form of aggregate as dosage of SL increases; at high pHs, the adsorption is approximately monolayer coverage. With pH values ranging from 3 to 11, the adsorption results are found to be not significantly affected by the addition of urea, ruling out the hydrogen bond as the controlling factor. The paper demonstrates that the main driving force of adsorption is considered as the synergistic effect of electrostatic and hydrophobic interactions when pH pHIEP with additives of Na2SO4 and NaCl.

A Research on the Driving Forces of Xinjiang Geological Heritage Resources Development from the Perspective of Tourism

2012 ◽  
Vol 518-523 ◽  
pp. 5905-5908 ◽  
Author(s):  
Cui Lin Li
Keyword(s):  
Sustainable Development ◽  
Driving Force ◽  
Government Regulation ◽  
Driving Forces ◽  
Geological Heritage ◽  
Regional Economic ◽  
Resource Endowment ◽  
The Government ◽  
External Driving ◽  
Resources Development

Developing geological heritage resource from the perspective of tourism is a new pattern of resource using. The development of Xinjiang geological heritage resource is restricted and effected by the internal and external driving forces and support. The internal driving force includes the resource endowment and the need for regional economic and sustainable development; the external driving force includes the competition of tourism, the market and the government regulation; support includes the construction of infrastructure, the improvement of tourism facilities and ecological support. All these forces restrict and effect each other and become a harmonious whole.

Identifying the Mechanisms of Enhanced Water Flow Through Carbon Nanotubes

2008 ◽  
Author(s):  
J. A. Thomas ◽  
A. J. H. McGaughey
Keyword(s):  
Carbon Nanotubes ◽  
Water Flow ◽  
Flow Rate ◽  
Driving Force ◽  
Slip Length ◽  
Dynamics Simulation ◽  
Flow Area ◽  
Water Viscosity ◽  
Flow Through ◽  
External Driving

Pressure-driven water flow through carbon nanotubes (CNTs) with diameters ranging from 1.66 nm to 4.99 nm is examined using molecular dynamics simulation. The flow rate enhancement, defined as the ratio of the observed flow rate to that predicted from the no-slip Hagen-Poiseuille relation, is calculated for each CNT. The enhancement decreases with increasing CNT diameter and ranges from 433 to 47. By calculating the variation of water viscosity and slip length as a function of CNT diameter, it is found that the results can be fully explained in the context of continuum fluid mechanics. The enhancements are lower than previously reported experimental results, which range from 560 to 100000, suggesting a miscalculation of the available flow area and/or the presence of an uncontrolled external driving force (such as an electric field) in the experiments.

scholarly journals The Mechanism of Orientation Detection Based on Artificial Visual System

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 54
Author(s):  
Xiliang Zhang ◽  
Tang Zheng ◽  
Yuki Todo
Keyword(s):  
Computer Simulation ◽  
Visual System ◽  
Driving Force ◽  
Local Orientation ◽  
Detection Mechanism ◽  
Biological Vision ◽  
Global Orientation ◽  
Orientation Information ◽  
Orientation Detection ◽  
Visual Cortex Neurons

As an important part of the nervous system, the human visual system can provide visual perception for humans. The research on it is of great significance to improve our understanding of biological vision and the human brain. Orientation detection, in which visual cortex neurons respond only to linear stimuli in specific orientations, is an important driving force in computer vision and biological vision. However, the principle of orientation detection is still unknown. This paper proposes an orientation detection mechanism based on dendrite calculation of local orientation detection neurons. We hypothesized the existence of orientation detection neurons that only respond to specific orientations and designed eight neurons that can detect local orientation information. These neurons interact with each other based on the nonlinearity of dendrite generation. Then, local orientation detection neurons are used to extract local orientation information, and global orientation information is deduced from local orientation information. The effectiveness of the mechanism is verified by computer simulation, which shows that the machine can perform orientation detection well in all experiments, regardless of the size, shape, and position of objects. This is consistent with most known physiological experiments.

scholarly journals Dynamic analysis of ecological security in central Yunnan province, China from 1990 to 2017

2021 ◽  
Vol 932 (1) ◽  
pp. 012002
Author(s):  
F Liu ◽  
C H Gao ◽  
J L Wang ◽  
J C H Zhou ◽  
J M Sha
Keyword(s):  
Driving Force ◽  
Yunnan Province ◽  
Control Measures ◽  
Evaluation Index System ◽  
Matrix Analysis ◽  
Regional Security ◽  
Ecological Security ◽  
Location Factors ◽  
Security Research ◽  
External Driving

Abstract Ecological security is an important content of national and regional security research. The Central Yunnan Province (CYP) has important location factors and social and economic development status, so ecological security research in CYP is quite relevant. For the purpose of our research, we adopted the S-PRD (Ecological Insecurity-Pressure-Regulation-External Driving Force) conceptual model to establish an evaluation index system based on the four subsystems of water, land, atmosphere, and biology to evaluate the ecological security of central Yunnan from 1990 to 2017 and analyse the characteristics of dynamic evolution. We used the grey incidence matrix analysis method to conduct retrospective grey relational evaluation and retrospective grey sensitivity evaluation and analyse the influencing factors of ecological security. The study conclusions showed that the security of the water system has been fluctuating and rising, and has stabilized in the past five years. Both the land system and the biological system have shown an upward trend, but the degree of change was relatively small, and the atmospheric system was stable. The evaluation value of the ecological environment insecurity of the four cities is generally on the rise. The control measures have the greatest impact on ecological insecurity, the second important factor is an external driving force.

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