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Effects of in-situ stress and delay time on rock damage under shaped charge jet blasting
In-situ stress and delay time in shaped charge jet blasting (SCJB) have significant effects on rock damage. In this study, the stress distribution...
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A novel stacking-based ensemble learning model for drilling efficiency prediction in earth-rock excavation
目的对钻进效率进行精确预测是制定土方开挖进度计划的关键。但现有预测方法多采用单个机器学**模型，存在参数敏感性和过拟合等问题，且往往忽略了环境因素和人员操作因素的影响。针对这些问题，本文提出一种同时考虑多种因素综合影响的新的集成学**预测方法。
创新点1....
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Numerical simulation of hydraulic fracture characteristics in gas hydrate bearing-sediments by using CDEM
Currently, gas hydrate exploitation suffers from problems such as low efficiency of production due to the low permeability of the reservoir and...
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Thermal-mechanical and springback behavior of dual-phase steel at warm temperatures
for non-quenchable dual-phase (DP) steel sheet, the warm forming process can effectively reduce the amount of springback, and the mechanical...
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Experimental study of scramjet cavity with rear edge slots and its performance in combustion enhancement
To improve the effect of the traditional two-dimensional trapezoidal cavity in promoting mixing and combustion, a three-dimensional cavity with slots...
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Analysis of magnetohydrodynamic squeezed viscous fluid flow in a porous medium
In this numerical analysis, the significance of features of squeezed viscous fluid flow in the presence of inclined magnetic field effect has been...
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Influence of temperature on creep behavior, mechanical properties and microstructural evolution of an Al-Cu-Li alloy during creep age forming
The effect of temperature in range of 155–175 °C on the creep behavior, microstructural evolution, and precipitation of an Al-Cu-Li alloy was...
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Promoting reaction kinetics of lithium polysulfides by cobalt polyphthalocyanine derived ultrafine Co nanoparticles mono-dispersed on graphene flakes for Li-S batteries
Lithium-sulfur (Li-S) batteries have been considered as the next generation high energy storage devices. However, its commercialization has been...
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Failure behavior and energy evolution characteristics of deep roadway sandstone under different microwave irradiation modes
Efficient breaking of hard rock and prevention and control of rock burst disasters are two key concerns for construction in deep areas with high...
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Supergravity effects on flame propagation and structure in hydrogen/air mixtures
In the current work, we investigated hydrogen/air flame propagation under supergravity conditions. Results show that when gravity is in the...
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A novel stacking-based ensemble learning model for drilling efficiency prediction in earth-rock excavation
目的对钻进效率进行精确预测是制定土方开挖进度计划的关键。但现有预测方法多采用单个机器学**模型, 存在参数敏感性和过拟合等问题, 且往往忽略了环境因素和人员操作因素的影响。针对这些问题, 本文提出一种同时考虑多种因素综合影响的新的集成学**预测方法。
创新点1....
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Influence of pre-stretching on quench sensitive effect of high-strength Al−Zn−Mg−Cu-Zr alloy sheet
The influence of pre-stretching on quench sensitive effect of high strength Al−Zn−Mg−Cu−Zr alloy AA 7085 sheet was investigated by tensile testing at...
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Microstructure evolution and oxidation behavior of silicon-modified aluminide coatings on IN718 superalloy at 1000 °C
Due to the increased service temperature of turbine blades, the high temperature conditions seriously deteriorate the mechanical properties of...
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Heterocoagulation mechanism between galena and fine calcite minerals in flotation separation
Heterocoagulation between fine particles can interfere with the flotation separation of different minerals. Therefore, the study of particle...
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Microstructure and properties of Cu-50Fe alloy produced by chemical co-precipitation and powder metallurgy
Traditional casting preparation of Cu-Fe alloy is difficult, especially when Fe content is relatively high, because there is a metastable immiscible...
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Experimental analysis of additional aerodynamic effects caused by wind-driven rain on bridge main girder
To study the additional aerodynamic effect on a bridge girder under the action of wind-driven rain, the rainfall similarity considering raindrop...
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Effect of Li addition on mechanical properties and ageing precipitation behavior of extruded Al−3.0Mg−0.5Si alloy
The effect of Li (2.0 wt%) addition on mechanical properties and ageing precipitation behavior of Al−3.0Mg−0.5Si was investigated by tensile test,...
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Performance degradation prediction of extra-wide concrete self-anchored suspension bridge under vehicle load considering time-dependent effects
In order to study the influence of concrete shrinkage and creep effect and temperature change on the extra-wide concrete self-anchored suspension...
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Effects of pre-rolling on mechanical properties and fatigue crack growth rate of 2195 Al-Li alloy
While pre-deformation is often conducted before aging treatment to increase the strength and microhardness of 2195 Al-Li alloy, it often increases...
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A seismic response prediction method based on a self-optimized Bayesian Bi-LSTM mixed network for high-speed railway track-bridge system
The construction of China’s high-speed railway (HSR) network has reached earthquake-prone regions, necessitating a timely and accurate post-disaster...