Mingzhi Chen¹, Zhandong Wang², Guifang Sun^1,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.4, pp. 1-1, 2024, DOI:10.32604/icces.2024.012203

Abstract Marine environments pose severe corrosion challenges to underwater equipment, thereby leading to significant risks and demanding immediate in-situ restoration. Here we developed an underwater laser directed energy deposition (UDMD) technique to repair the E690 steel and enhance its corrosion resistance. Systematic investigations about the underwater pressure (P) and 316L stainless steel (SS316L) coatings on the microstructure, mechanical properties, and corrosion resistance of the repaired E690 steel were conducted. Results show that water cooling can refine grain, promote the formation of lath martensite, and increase dislocation density. No obvious relationship between the pressure and microstructure evolution… More >

Lei Yu^1,2, Yingjie Yan^1,2, Hao Dong^3,4, Suk-Chun Moon^5,*, Zhengyi Jiang^5,*, Rui Cao^1,2,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.4, pp. 1-2, 2024, DOI:10.32604/icces.2024.011941

Abstract Ni60A hardfacing alloy, as one of the highest-alloy grades and hardest alloy of Ni-Cr-B-Si alloys, is expected to be used as hardfacing alloy for thrust discs in nuclear main pumps to reduce friction, corrosion and erosion. Since mechanical properties of Ni-Cr-B-Si alloys are very sensitive to their defects and microstructures, heat treatment/remelting methods have been used to eliminate porosity and to modify microstructural heterogeneity. In our previous research, Ni60A hardfacing layer with high micro-hardness and excellent bonding strength has been fabricated onto 0Cr18Ni10Ti austenitic stainless steel using hot isostatic press diffusion bonding technique. However, some… More >

Tiangang Lan¹, Mengyuan Ma¹, Shifeng Lu¹, Ling Xu^1,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.1, pp. 1-1, 2024, DOI:10.32604/icces.2024.010867

Abstract Natural loess is a kind of kaolin wind-deposited soil.Thedifferent layers of loess experienced different overburden pressures and wetting-drying cycles, resulting in different water retention behaviors.The axis translation technique and the vapor equilibrium technique to determine the water retention behaviorof the three different sediment depth natural loess during drying and wettingprocess. In addition, the microstructure evolution experienced wetting and drying cycles also characterized by mercury intrusion porosimetry. The saturation and air entry value increased with the sediment depth increased because deeper sediment depth means lower initial void ratio. Thewaterretentioncurveshowsthatthereisalmost nohysteresis observed around the naturalsuction,and in relatively… More >

VINíCIUS AUGUSTO SIMãO¹, LUIZ GUSTAVO DE ALMEIDA CHUFFA¹, LEóN FERDER², FELIPE INSERRA², WALTER MANUCHA^3,4,*

BIOCELL, Vol.48, No.10, pp. 1429-1442, 2024, DOI:10.32604/biocell.2024.053478 - 02 October 2024

Abstract The interplay between mitochondria, epigenetics, and the microbiota is intricately linked to both health and disease. Within our cells, a complex molecular dance occurs, where these components intertwine in a mesmerizing ballet that plays a decisive role in our health. Mitochondria, beyond being energy powerhouses, modulate nuclear gene expression through messengers like reactive oxidative stress (ROS) and calcium. Epigenetics, acting as the molecular conductor, regulates the expression of both nuclear and mitochondrial genes through modifications like DNA methylation. The intestinal microbiota itself produces short-chain fatty acids (SCFAs) that influence mitochondrial activity. SCFA-induced epigenetic modifications, like… More >

Jin Zhou, Minjie Shao^*, Ye Tian, Qi Xia^*

CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.2, pp. 1327-1345, 2024, DOI:10.32604/cmes.2024.054059 - 27 September 2024

Abstract By analyzing the results of compliance minimization of thermoelastic structures, we observed that microstructures play an important role in this optimization problem. Then, we propose to use a multiple variable cutting (M–VCUT) level set-based model of microstructures to solve the concurrent two–scale topology optimization of thermoelastic structures. A microstructure is obtained by combining multiple virtual microstructures that are derived respectively from multiple microstructure prototypes, thus giving more diversity of microstructure and more flexibility in design optimization. The effective mechanical properties of microstructures are computed in an off-line phase by using the homogenization method, and then More >

Khalilallah Memarzadeh¹, Hamed Kazemipoor^1,*, Mohammad Fallah¹, Babak Farhang Moghaddam²

CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.2, pp. 1275-1304, 2024, DOI:10.32604/cmes.2024.050306 - 27 September 2024

Abstract Motivated by a critical issue of airline planning process, this paper addresses a new two-stage scenario-based robust optimization in operational airline planning to cope with uncertainty and possible flight disruptions. Following the route network scheme and generated flight timetables, aircraft maintenance routing and crew scheduling are critical factors in airline planning and operations cost management. This study considers the simultaneous assignment of aircraft fleet and crew to the scheduled flight while satisfying a set of operational constraints, rules, and regulations. Considering multiple locations for airline maintenance and crew bases, we solve the problem of integrated… More > Graphic Abstract

Mudasar Zafar^1,2,3,*, Hamzah Sakidin¹, Abida Hussain¹, Loshini Thiruchelvam⁴, Mikhail Sheremet⁵, Iskandar Dzulkarnain³, Roslinda Nazar⁶, Abdullah Al-Yaari¹, Rizwan Safdar^7,8

CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.2, pp. 1193-1211, 2024, DOI:10.32604/cmes.2024.049259 - 27 September 2024

Abstract This study aims to formulate a steady-state mathematical model for a three-dimensional permeable enclosure (cavity) to determine the oil extraction rate using three distinct nanoparticles, SiO₂, Al₂O₃, and Fe₂O₃, in unconventional oil reservoirs. The simulation is conducted for different parameters of volume fractions, porosities, and mass flow rates to determine the optimal oil recovery. The impact of nanoparticles on relative permeability ( and water is also investigated. The simulation process utilizes the finite volume ANSYS Fluent. The study results showed that when the mass flow rate at the inlet is low, oil recovery goes up. In addition, More >

Lihong Huang¹, Xin Tao², Tieping Wei³, Zhifeng Li⁴

Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.40, No.1, pp. 1-15, 2024, DOI:10.23967/j.rimni.2024.01.002 - 15 January 2024

Abstract The unidirectional tensile stress-strain curves of four kinds of carbon black-filled rubbers with different volume contents were obtained by mechanical experiments, and the fine morphology maps of the carbon black-filled rubber composites were obtained by electron microscope experiments. Based on the hyperelastic constitutive model of rubber, an ellipsoidal carbon black particles randomly distributed finite element model was established using DIGIMAT and ABAQUS, and uniaxial tensile simulation was carried out on the established two-dimensional model. The effects of the volume fraction, distribution angle and number of agglomerates of carbon black particles on the stress-strain relationship curve More >

LU Zhongxiang¹, SHOU Lingchao², Rini Asnida Abdullah¹, Muhammad Irfan Bin Shahrin¹, CHEN Yintao¹, SHAO Xin³, FAN Wenju⁴, Amber Islam¹, ZHANG Hengxu⁵

Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.40, No.1, pp. 1-8, 2024, DOI:10.23967/j.rimni.2024.03.003 - 25 March 2024

Abstract This study utilizes ABAQUS finite element software to analyze embankment deformation during shield tunneling. Results reveal that shield tunneling effects are manageable.The left tunnel line successfully tunnels beneath the embankment, causing a maximum settlement of 8.7 mm, meeting regulations. The ground surface exhibits a "V"-shaped lateral settlement trough, approximately five times the tunnel centerline width. Conversely, the right tunnel line induces a more extensive impact, with a 12.2 mm maximum settlement.Different lateral settlement patterns emerge in soil at varying depths. The left tunnel creates a "V" shape, with slightly increasing settlement above the tunnel axis More >

Sisi Li^1,3, Nailiang Zhong^2,*, Qingke Guo^1,*

International Journal of Mental Health Promotion, Vol.26, No.9, pp. 679-695, 2024, DOI:10.32604/ijmhp.2024.054206 - 20 September 2024

Abstract Background: Theory of Mind (ToM) and empathy are crucial cognitive and emotional capacities that influence social interactions. While their role in promoting prosocial behavior has been established, the potential moderating effect of mindfulness on this relationship remains unexplored. Understanding these complex interactions is vital for developing effective interventions to foster prosocial behavior among college students. This study examines the influence of ToM on college students’ prosocial behavior and explores the moderating role of mindfulness in this relationship. Methods: A mixed-methods approach combining questionnaires and experimental design was employed. Study 1: A survey of 759 college… More >