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Finite cell method compared to h-version finite element method for elasto-plastic problems

Applied Mathematics and Mechanics(English Edition) 2014年第10期35卷 1239-1248页

作者： a.abedian J.PARVIZIAN A.DSTER E.RANK Department of Mechanical Engineering Daneshpajoohan Higher Education Institute Department of Mechanical Engineering Isfahan University of Technology Numerische Strukturanalyse mit Anwendungen in der Schiffstechnik (M-10) Technische Universitt Hamburg-Harburg Lehrstuhl fr Computation in Engineering Fakultt fr Bauingenieur-und Vermessungswesen Technische Universitt Mnchen

The finite cell method （FCM） combines the high-order finite element method （FEM） with the fictitious domain approach for the purpose of simple meshing. In the present study, the FCM is used to the Prandtl-Reuss flow theory of plasticity, and the results are compared with the h-version finite element method （h-FEM）. The numerical results show that the FCM is more efficient compared to the h-FEM for elasto-plastic problems, although the mesh does not conform to the boundary. It is also demonstrated that the FCM performs well for elasto-plastic loading and unloading.

关键词： finite cell method (FCM) h-version finite element method (h-FEM),Prandtl-Reuss quadtree octree

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The Formulation of Finite Difference RBFWENO Schemes for Hyperbolic Conservation Laws:An Alternative Technique

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Advances in Applied Mathematics and Mechanics 2023年第4期15卷 1023-1055页

作者： Rooholah abedian Mehdi Dehghan School of Engineering Science College of EngineeringUniversity of TehranIran Department of Applied Mathematics Faculty of Mathematics and Computer ScienceAmirkabir University of TechnologyNo.424Hafez Ave.TehranIran

To solve conservation laws,efficient schemes such as essentially nonoscillatory(ENO)and weighted ENO(WENO)have been introduced to control the Gibbs *** on radial basis functions(RBFs)with the classical WENO-JS weights,a new type of WENO schemes has been proposed to solve conservation laws[*** et al.,***.,70(2017),pp.551–575].The purpose of this paper is to introduce a new formulation of conservative finite difference RBFWENO schemes to solve conservation *** the usual method for reconstructing the flux functions,the flux function is generated directly with the conservative *** with Guo and Jung(2017),the main advantage of this framework is that arbitrary monotone fluxes can be employed,while in Guo and Jung(2017)only smooth flux splitting can be used to reconstruct flux *** 1D and 2D benchmark problems are prepared to demonstrate the good performance of the new scheme.

关键词： Weighted essentially non-oscillatory scheme radial basis functions interpolation ﬁnite difference method hyperbolic conservation laws

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Sustained small and intermediate size proteins expression in phorbol 12-myristate 13-acetate/ionomycine prolonged stimulated human fibroblasts

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Asian Pacific Journal of Tropical Biomedicine 2017年第5期7卷 432-436页

作者： Zeinab abedian Sadegh Fattahi Roghayeh Pourbagher Sahar Edrisi Amrollah Mostafazadeh Cellular and Molecular Biology Research Center Health Research InstituteBabol University of Medical SciencesBabolIran Dental Material Research Center Faculty of DentistryBabol University of Medical SciencesBabolIran

Objective:To compare the protein profile of culture supernatants in stimulated and unstimulated human fibroblasts to find some proteins indicating the presence of fibroblasts and their activation ***:Dermal fibroblasts were stimulated with phorbol 12-myristate 13-acetate(PMA)/ionomycine for 72 *** assay was done to determine cell viability and A/E fluorescent staining was used to evaluate the cell death *** analysis was performed by gradient SDS polyacrylamide gel electrophoresis 8%–16%.Results:The supernatant of 24 h cultured both stimulated and unstimulated fibroblasts showed two bands in SDS-PAGE analysis with relative molecular weights of 8.59 and78.8 k *** bands density was decreased during the next 48 h in unstimulated cells while their expression was continued in PMA or PMA/ionomycine stimulated cells and a new 85.3 k Da band was appeared in unstimulated and 72 h PMA stimulated ***,we found another seven small size(10–19.5 k Da) proteins in supernatants of48 h and 72 h unstimulated but not in PMA or PMA/Ionomycine stimulated *** of these proteins expression were down regulated following fibroblast *** down-regulation is consistent with our finding that PMA or PMA/ionomycine stimulated cells exhibited a significant level of apoptosis cell ***:Human fibroblasts produce some small to intermediate sized proteins with specific SDS-PAGE profile upon cell *** of these proteins can be excreted in urine and can be immunogen theoretically so this data provided a reliable clue for fibrosis biomarker screening based on designation of an appropriated immunoassay.

关键词： Fibroblast activation Apoptosis Protein electrophoresis phorbol 12-myristate 13-acetate Ionomycine Fibrosis Biomarker

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