Results 31 to 40 of about 1,173,141 (265)

Convergence and Optimality of Adaptive Mixed Finite Element Methods

open access: yes, 2009
The convergence and optimality of adaptive mixed finite element methods for the Poisson equation are established in this paper. The main difficulty for mixed finite element methods is the lack of minimization principle and thus the failure of ...
Chen, Long, Holst, Michael, Xu, Jinchao
core   +2 more sources

A Dual-Horizon Peridynamics–Discrete Element Method Framework for Efficient Short-Range Contact Mechanics

open access: yesModelling
Short-range forces enable peridynamics to simulate impact, yet it demands a computationally expensive contact search and includes no intrinsic damping.
Kinan Bezem   +2 more
doaj   +1 more source

Parameter Calibration of Discrete Element Model for Cotton Rootstalk–Soil Mixture at Harvest Stage in Xinjiang Cotton Field

open access: yesAgriculture, 2023
Due to the lack of accurate discrete element simulation model parameters in the design optimization process of key agricultural machinery components in the whole mechanization technology system of cotton generation, the optimization and improvement of ...
Deli Jiang   +5 more
doaj   +1 more source

Study on Sliding Friction Coefficient in Block Element Method Based on Experimental Method

open access: yesApplied Sciences
The mechanics and motion behavior of granular materials affect the production and life of human beings. In order to study the influence of the sliding friction coefficients corresponding to different contact types in the block discrete element method on ...
Pengcheng Liu, Jun Liu, Yue Wang
doaj   +1 more source

Slope Failure of Noncohesive Media Modelled with the Combined Finite–Discrete Element Method

open access: yesApplied Sciences, 2019
Slope failure behaviour of noncohesive media with the consideration of gravity and ground excitations is examined using the two-dimensional combined finite⁻discrete element method (FDEM).
Xudong Chen, Hongfan Wang
doaj   +1 more source

Parameters Calibration of Discrete Element Model for Corn Straw Cutting Based on Hertz-Mindlin with Bonding

open access: yesApplied Sciences, 2023
Aiming at the lack of a precise discrete element model in the simulation analysis of corn straw crushing, this paper established bond models with different structure and particle models with different properties of corn straw based on Hertz-Mindlin with ...
Wenhang Liu   +5 more
doaj   +1 more source

From fracture to fragmentation: discrete element modeling -- Complexity of crackling noise and fragmentation phenomena revealed by discrete element simulations

open access: yes, 2014
Discrete element modelling (DEM) is one of the most efficient computational approaches to the fracture processes of heterogeneous materials on mesoscopic scales.
Carmona, Humberto A.   +2 more
core   +1 more source

Fully discrete finite element data assimilation method for the heat equation [PDF]

open access: yes, 2017
We consider a finite element discretization for the reconstruction of the final state of the heat equation, when the initial data is unknown, but additional data is given in a sub domain in the space time.
Burman, Erik   +2 more
core   +3 more sources

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

open access: yesFEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Numerical prediction of dynamic stability loss of a flexible cylindrical shell in a granular medium [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2019
The paper presents an application of the discrete element method for an analysis of dynamical stability loss of the flexible cylindrical shell section interacting with a model granular medium.
Paweł Szklennik, Grzegorz Bąk
doaj   +1 more source

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