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 ...
A state-dependent bounding surface model of coarse-grained materials ...
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It should be noted that the GSD of coarse-grained materials is always changed with particle breakage. This phenomenon is unavoidable for rockfill materials when the consolidation pressure reaches 1.5 MPa, as mentioned in section 3.1. Once crushing, granular material behaviors would be dominated by not only initial GSD but also GSD evolution.
Soil classification - Wikipedia
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The most common engineering classification system for soils in North America is the Unified Soil Classification System (USCS). The USCS has three major classification groups: (1) coarse-grained soils (e.g. sands and gravels ); (2) fine-grained soils (e.g. silts and clays ); and (3) highly organic soils (referred to as "peat").
Rapid discovery of stable materials by coordinate-free coarse graining ...
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In materials science, however, an analogous coarse-grained representation of crystal structures is missing. Thus, we are left confronting the innumerable search space problem. Composition-based approaches can somewhat overcome this challenge ( 6 – 9 ) but do so at the cost of discarding all information about the crystal structures of the ...
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
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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.
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 ...
Coarse-Grained Modeling of Ion-Containing Polymers
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Coarse-grained modeling provides an efficient approach for exploring the structural and dynamical properties of these soft materials. The unique physicochemical properties of such polymers are of broad interest. In this review, we summarize the current development and understanding of the structure–property relationship of ion-containing ...
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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.
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.
(PDF) Geotechnical Characterisation of Coarse-Grained ... - ResearchGate
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Material after triaxial compression testing (D50 = 37.5 mm). Original gradation sample 3.1 Maximum and minimum densities Maximum and minimum densities of each PSD are shown in Figure 4.
Uncertainty driven active learning of coarse grained free ... - Nature
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Top-down coarse grained force fields are well established with widespread use across different applications 3,4,12,13,14,15,16,17,18,20,21, while the development of bottom-up coarse grained models ...
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 ...
Ultrasonic signal enhancement for coarse grain materials by machine ...
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1. Introduction. 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 in noise background resulting from ...
Mechanical Modeling of Frozen Coarse-Grained Materials ... - Hindawi
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In the cold regions of China, coarse-grained materials are frequently encountered or used as backfilling materials in infrastructure construction, such as dams, highways, railways, and mineral engineering structures. Effects of confining pressure (0.2, 0.5, and 1 MPa) and frozen temperature (−2, −5, −10, and −15°C) on the stress-strain response and elastic modulus were ...
Granularity: Coarse-Grained vs. Fine-Grained - Baeldung
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So, we’ll compare coarse-grained and fine-grained concepts in a systematic summary. 2. Coarse Granularity. We can see coarse-grained entities as a small collection of components (or even a monolithic entity) executing high-level operations or representing complex elements. But, granularity is a dynamic concept: the scenario defines which is ...
Enhancing Coarse-Grained Models through Machine Learning
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The system size and sampling time issues can be lessened by representing the system in a low-resolution “Coarse-Grained” (CG) model which significantly reduces the number of particles in the system. ... and material properties is of basic concern in modern soft material science and includes std. properties of bulk materials and surface and ...

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