Sabrina Meddah^1,2,*, Sid Ahmed Tadjer³, Abdelhakim Idir⁴, Kong Fah Tee^5,6,*, Mohamed Zinelabidine Doghmane¹, Madjid Kidouche¹

Structural Durability & Health Monitoring, Vol.19, No.1, pp. 77-103, 2025, DOI:10.32604/sdhm.2024.053541 - 15 November 2024

Abstract Maintaining the integrity and longevity of structures is essential in many industries, such as aerospace, nuclear, and petroleum. To achieve the cost-effectiveness of large-scale systems in petroleum drilling, a strong emphasis on structural durability and monitoring is required. This study focuses on the mechanical vibrations that occur in rotary drilling systems, which have a substantial impact on the structural integrity of drilling equipment. The study specifically investigates axial, torsional, and lateral vibrations, which might lead to negative consequences such as bit-bounce, chaotic whirling, and high-frequency stick-slip. These events not only hinder the efficiency of drilling… More >

Hayder Kareem Sakran^1,2, Mohd Sharizal Abdul Aziz^1,*, Chu Yee Khor³

CMES-Computer Modeling in Engineering & Sciences, Vol.140, No.1, pp. 109-137, 2024, DOI:10.32604/cmes.2024.047245 - 16 April 2024

Abstract The centrifugal pump is a prevalent power equipment widely used in different engineering patterns, and the impeller blade wrap angle significantly impacts its performance. A numerical investigation was conducted to analyze the influence of the blade wrap angle on flow characteristics and energy distribution of a centrifugal pump evaluated as a low specific speed with a value of 69. This study investigates six impeller models that possess varying blade wrap angles (95°, 105°, 115°, 125°, 135°, and 145°) that were created while maintaining the same volute and other geometrical characteristics. The investigation of energy loss… More > Graphic Abstract

Huifeng Li¹, Qiang Zhao², Hai Wang¹, Qinglong Dong^3,*, Yi Xu^4,*

Phyton-International Journal of Experimental Botany, Vol.91, No.2, pp. 315-331, 2022, DOI:10.32604/phyton.2022.016951 - 26 September 2021

Abstract BEL1-like homeodomain (BLH) family proteins are homeodomain transcription factors, which are found ubiquitously in plants and play important roles in regulating meristem and flower development. Although BLH proteins have been reported in some plant species, there is very little information available for plants in the Malus genus (e.g., apple tree:Malus domestica). In the present study, we identified 19 apple MdBLH genes. Phylogenetic analysis revealed that the MdBLH genes could be divided into five groups. Analysis of gene structure showed that MdBLH gene has four exons, and the third exon was 61 bp in length. Chromosomal location analysis suggested that… More >

Haiwang Yue¹, Jianwei Wei¹, Junliang Xie¹, Shuping Chen¹, Haicheng Peng¹, Hongmei Cao², Junzhou Bu^1,*, Xuwen Jiang^3,*

Phyton-International Journal of Experimental Botany, Vol.91, No.1, pp. 57-81, 2022, DOI:10.32604/phyton.2022.017308 - 16 August 2021

Abstract Facing the trend of increasing population, how to increase maize grain yield is a very important issue to ensure food security. In this study, 28 nationally approved maize hybrids were evaluated across 24 different climatic conditions for two consecutive years (2018–2019). The purpose of this study was to select high-yield with stable genotypes and identify important agronomic traits for maize breeding program improvement. The results of this study showed that the genotype ╳ environment interaction effects of the 12 evaluated agronomic traits was highly significant (P < 0.001). We introduced a novel multi-trait genotype-ideotype distance index… More >

Hecui Zhang^1,#, Xiaoping Lian^2,#, Yizhong Zhang¹, Tonghong Zuo¹, Chongmo Yuan¹, Qinqin Xie¹, Liquan Zhu^1,*

Phyton-International Journal of Experimental Botany, Vol.90, No.6, pp. 1599-1612, 2021, DOI:10.32604/phyton.2021.015852 - 28 June 2021

Abstract To identify and characterize genes involved in reproductive tissue abscission in Brassica oleracea, the transcript data of pollinated pistil was analyzed. A differentially expressed gene, named BoFAZ1(FLOWER ABSCISSION ZONE1) was identified, which contains one exon and encompass a 139aa. Furthermore, a T-DNA insertion mutant (SALK_302_G01) (faz1 mutant) was obtained from Arabidopsis thaliana mutant library. Floral organ shedding from mutants was delayed and a V-shaped structure in the boundary region between the stalk and torus of the sepal abscission zone was obtained in faz1 mutant. The cell density of this structure was lower than that of the corresponding region in… More >

Tomonori Yamada^*, Yuki Yamamoto, Giwon Hong, Shinobu Yoshimura

The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 61-61, 2019, DOI:10.32604/icces.2019.05386

Abstract This paper describes performance study of a mesh moving technique with minimum-height-based stiffening for robust fluid-structure interaction (FSI) analysis with large deformation. The authors have been developing a general purpose parallel FSI analysis system for large scale problems with interface tracking approach and applied it to the analyses of flapping motion of micro air vehicles, fuel assemblies of the boiling water reactors under seismic loading, wind turbines and so on. The practical use of FSI analysis system requires the robustness for the parametric design of various mechanical systems. In this context, mesh moving technique is… More >

Zheng-qi Liu^∗, Ying Liu^∗,†, Tian-tian Liu^∗, Qing-shan Yang^‡

Molecular & Cellular Biomechanics, Vol.11, No.2, pp. 129-149, 2014, DOI:10.3970/mcb.2014.011.129

Abstract In this paper, the hemodynamic characteristics of blood flow and stress distribution in a layered and stenotic aorta are investigated. By introducing symmetrical and unsymmetrical stenosis, the influence of stenosis morphology and stenotic ratio on the coupled dynamic responses of aorta is clarified. In the analysis, the in-vivo pulsatile waveforms and fully fluid–structure interaction (FSI) between the layered elastic aorta and the blood are considered. The results show that the fluid domain is abnormal in the stenotic aorta, and the whirlpool forms at the obstructed and downstream unobstructed regions. The maximum wall shear stresses appear… More >

D. Ngo-Cong, N. Mai-Duy, W. Karunasena, T. Tran-Cong

CMES-Computer Modeling in Engineering & Sciences, Vol.83, No.5, pp. 459-498, 2012, DOI:10.3970/cmes.2012.083.459

Abstract The partition of unity method is employed to incorporate the moving least square (MLS) and one dimensional-integrated radial basis function (1D-IRBFN) techniques in a new approach, namely local MLS-1D-IRBFN or LMLS-1D-IRBFN. This approach leads to sparse system matrices and offers a high level of accuracy as in the case of 1D-IRBFN method. A new numerical procedure based on the 1D-IRBFN method and LMLS-1D-IRBFN approach is presented for a solution of fluid-structure interaction (FSI) problems. A combination of Chorin's method and pseudo-time subiterative technique is presented for a transient solution of 2-D incompressible viscous Navier-Stokes equations More >

Alexander G. TYAPIN

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.2, pp. 51-52, 2011, DOI:10.3970/icces.2011.018.051

Abstract The author extends the previously proposed combined asymptotic method of seismic SSI analysis for the multiply-supported structures. One of the examples of such structures in Nuclear Power Plant is the transportation portal linked to the reactor building by horizontal beams.
The first step still is (like for single-base structure) to develop the dynamic stiffness matrices condensed to the rigid contact surfaces in the frequency domain separately for the soil foundation and for the structure.
For the soil foundation special computer codes like SASSI are used for this purpose. Seismic forces acting to the fixed basements… More >

Yongjie Zhang¹, Wenyan Wang¹, Xinghua Liang¹, Yuri Bazilevs², Ming-Chen Hsu², Trond Kvamsdal³, Reidar Brekken⁴, Jørgen Isaksen⁵

CMES-Computer Modeling in Engineering & Sciences, Vol.42, No.2, pp. 131-150, 2009, DOI:10.3970/cmes.2009.042.131

Abstract This paper describes a comprehensive and high-fidelity finite element meshing approach for patient-specific arterial geometries from medical imaging data, with emphasis on cerebral aneurysm configurations. The meshes contain both the blood volume and solid arterial wall, and are compatible at the fluid-solid interface. There are four main stages for this meshing method: 1) Image segmentation and geometric model construction; 2) Tetrahedral mesh generation for the fluid volume using the octree-based method; 3) Mesh quality improvement stage, in which edge-contraction, pillowing, optimization, geometric flow smoothing, and mesh cutting are applied to the fluid mesh; and 4) More >