Granularity - Wikipedia

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Precision and ambiguity. Coarse-grained materials or systems have fewer, larger discrete components than fine-grained materials or systems.. A coarse-grained description of a system regards large subcomponents.; A fine-grained description regards smaller components of which the larger ones are composed.; The concepts granularity, coarseness, and fineness are relative; and are used when ...
Differences Between Coarse-Grained and Fine-Grained Soil
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Coarse-grained soils have 50% or less material passing the No. 200 sieve. Fine-grained soils have 50% or more material passing the No. 200 sieve. Engineering properties such as strength and compressibility of coarse-grained soil are governed by the grain-size of the particles and their structural arrangement.
Approaches and Perspective of Coarse-Grained Modeling and Simulation ...
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In CG-MD, one or more monomers/units of the hybrid materials are represented as a coarse-grained bead capable of reproducing parts of the polymer architecture. This leads to the loss of fine-grained atomic details of the system, which are crucial for studying properties and interactions of atom-level structures, but concurrently saves a ...
Coarse Grained Model - an overview | ScienceDirect Topics
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Coarse-grained models. Coarse-grained models are aimed at building simplified representations of complex systems that allow keeping the main chemical/physical peculiarities (such as the interplay between hydrophilic and hydrophobic effects) and performing affordable and meaningful simulations, which could not be feasible with, for example ...
Bottom-up Coarse-Graining: Principles and Perspectives - ACS Publications
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driving the properties of real world materials and complex systems (e.g., those found in biology, chemistry, and materials science). As a ... such as moving from an atomistic simulation to that of the resolution of large coarse-grained (CG) groups of atoms, can partially ameliorate the cost of individual simulations, the relationship between ...
Coarse-graining auto-encoders for molecular dynamics | npj ...
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Coarse-grained (CG) molecular modeling has been used extensively to simulate complex molecular processes with lower computational cost than all-atom simulations. 1,2 By compressing the full ...
Coarse-grained Dynamics Simulation in Polymer Systems: from ... - Springer
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Based on recent studies in our group, the main progress of coarse-grained simulation methods in studying the structure, properties and physical mechanism of polymer materials is reviewed. It is anticipated to provide a reference for further development of coarse-grained simulation methods and software suitable for polymer research.
Modeling the mechanical behavior of coarse-grained soil ... - Springer
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Systematic investigation of the effects of individual particle properties, such as shape, size, surface roughness, and constituent materials stiffness, on the behavior of coarse-grained soils requires careful control over the other particle properties. Achieving this control is a pervasive challenge in investigations with naturally occurring soils. The rapid advance of modern additive ...
(PDF) Geotechnical Characterisation of Coarse-Grained ... - ResearchGate
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Coarse-grained materials in engineering projects can . contain pa rticle sizes greater th an 175 mm. Approaches . for evaluating the shear strength and behaviour of coarse-
Effects of coarse-grained material on hydraulic properties and shear ...
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After some trial mixes, Indrawan et al. (2006) showed that permeability of soil mixtures started to increase when mixed with more than 50% coarse-grained materials. Similar results have also been observed by other researchers (e.g., Shakoor and Cook (1990) and Shelley and Daniel (1993) .
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Bottom-up Coarse-Graining: Principles and Perspectives
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Below, we briefly describe these essential steps required for bottom-up CG modeling and discuss how they are related to the aforementioned challenges. 2-1. Coarse-Grained Mapping. The process of applying a CG mapping reduces the high-dimensional atomistic phase space to a low-dimensional CG phase space.
COARSE-GRAINED definition | Cambridge English Dictionary
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COARSE-GRAINED meaning: 1. Coarse-grained rock, soil, paper, material, etc. is rough, or has pieces in it that are larger…. Learn more.
Effect of Gradation on the Strength and Stress-Dilation Behavior of ...
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The influence of gradation on the strength and stress-dilatancy behavior of coarse-grained soils is complex because it depends on the soil state, which is complicated by the use of parameters that can bias and obscure the effects of gradation (i.e., void ratio versus relative density or state parameter).
Experimental investigation and prediction model of permeability in ...
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Coarse-grained soil is the primary material used as filler for high-speed railway subgrades [41].The composition, shape, gradation, and pore characteristics of these soils have a significant impact on their permeability [1], [23], [33], [13], [42], [43], [40], [39], [17].Fine particle content is a key factor influencing the permeability of coarse-grained soils with high permeability [16], [33 ...
Energy renormalization for coarse-graining polymers having ... - Science
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Polymer glass-forming (GF) materials exhibit complex dynamic and mechanical properties that strongly depend on temperature due to the glass transition (), and assessing these properties using all-atomistic (AA) molecular dynamics (MD) simulations is inherently challenging because of their limitations of accessing extended time and length scales.. Multiscale modeling, such as coarse-grained (CG ...
Constitutive Modeling of Coarse-Grained Materials Incorporating the ...
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Coarse-grained materials (CGMs), including gravel, ballast, and rockfill material, exhibit a complicated stress-strain-volume change behavior, which is state dependent and influenced by considerable particle breakage even under relatively low pressure. A generalized plasticity model with a multiaxial formulation is developed for CGMs based on ...
Coarse-graining strategies for predicting properties of ... - Springer
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The ability of atomistic and coarse-grained models to discern between two polymers of very similar architecture is examined. To this end, polyether ether ketone (PEEK) and polyether ketone ketone (PEKK) are chosen. The difference in glass transition temperature and the similarity in compressive responses of the two polymers are captured by all-atom models. A coarse-graining scheme, with 6 ...
Coarse‐grained approach to amorphous and anisotropic materials in ...
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The growth of TiO 2 and ZnO thin films is studied by means of coarse-grained kinetic Monte Carlo simulations under conditions typically encountered in plasma-enhanced chemical vapor deposition experiments. The basis of our approach is known to work well to simulate the growth of amorphous materials using cubic grids and is extended here to reproduce not only the morphological characteristics ...
Gaussian representation of coarse-grained interactions of liquids ...
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Low resolution coarse-grained (CG) models provide remarkable com- putational and conceptual advantages for simulating soft materials. In principle, bottom-up CG models can reproduce all structural and thermodynamic properties of atomically detailed models that can be observed at the resolution of the CG model.
Ultrasonic signal enhancement for coarse grain materials by machine ...
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It is well-recognized that the coarse grained materials, such as austenitic stainless steel, present high attenuation and scattering of ultrasonic wave due to the presence of lots of grain boundaries inside this kind of materials [1]. When a coarse-grained material is detected by ultrasonic testing (UT), flaw echoes will probably be submerged ...

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