76 Result(s)
within
**n-Hai Li
Engineering, general
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Article
Contaminant transport modelling of heavy metal pollutants in soil and groundwater: An example at a non-ferrous smelter site
The topsoil of smelter sites is subjected to severe contamination by heavy metals (HMs). Existing numerical simulations typically treat soil and groundwater separately owing to data limitations and computation...
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Article
Soil microbial community in lead smelting area and the role of sulfur-oxidizing bacteria
The long-term operation of the lead smelter has brought serious heavy metal pollution to the surrounding soil. The microbial community structure and composition of heavy metal contaminated soil is important fo...
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Article
Contribution of amino acid composition and secondary structure to the antioxidant properties of tilapia skin peptides
Tilapia skin is a byproduct of tilapia processing and can be used as a potential resource to produce antioxidant peptides. In this study, the process conditions for the extraction of antioxidant peptides were ...
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Article
A numerical study based on GBM3D-DEM model: Multi-level force chain analysis in dynamic flexural tensile strength test
The force chain network is the key information of rock materials under loading, which is close to the micro-scale cracking and macroscopic mechanical behavior of rocks. In this paper, a novel 3D grain-based mo...
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Article
Selective depression action of gum arabic in flotation separation of specularite and chlorite
As a typical iron-containing silicate, it is challenging to separate chlorite from specularite owing to their similar density, magnetic and surface physicochemical characteristics. Gum arabic (GA) was used as ...
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Article
Dynamic behavior of fault tunnel lining under seismic loading conditions
The tunnel lining structure will withstand diseases such as cracking, collapse and dislocation in earthquake action, and heavy losses will be brought, especially when the tunnel passes through the fault. In th...
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Article
Buckwheat core derived nitrogen- and oxygen-rich controlled porous carbon for high-performance supercapacitors
We propose a simple and effective one-step activation route to prepare a hierarchically porous carbon with buckwheat core acting for precursor. The as-obtained porous carbon (BCPC-3) shows high specific surfac...
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Article
Theoretical analysis and numerical simulation on the coupled support technology of concrete-filled steel tube and bolt-cable in deep roadway
Coupled support technology for concrete-filled steel tube support (CFSTS) and bolt-cable (BC) used in deep roadways often fails, and increasing the length of BC is a waste of material. Therefore, changing the ...
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Article
Test method of laser paint removal based on multi-modal feature fusion
Laser cleaning is a highly nonlinear physical process for solving poor single-modal (e.g., acoustic or vision) detection performance and low inter-information utilization. In this study, a multi-modal feature ...
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Article
Effects of earthquake on damage evolution and failure mechanism of key rock pillars in underground engineering
Rock pillar is the key supporting component in underground engineering. During an earthquake, the key rock pillar must bear both the seismic load and the load transferred from other damaged pillars. This paper...
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Article
Optical investigations on lean combustion improvement of natural gas engines via turbulence enhancement
In the global background of “Carbon Peak” and “Carbon Neutral”, natural gas engines show great advantages in energy-saving and pollution reduction. However, natural gas engines suffer from the issues of combus...
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Article
Reaction behavior of silicon-rich diasporic bauxite with ammonium sulfate during roasting
The separation of Al from the silicon-rich diasporic bauxite is of great significance in alumina production. Herein, we proposed a low-temperature ammonium sulfate roasting-water leaching process to extract al...
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Article
Ferroelectric polarization-enhanced photocatalytic performance of heterostructured BaTiO3@TiO2 via interface engineering
A catalyst of ferroelectric-BaTiO3@photoelectric-TiO2 nanohybrids (BaTiO3@TiO2) with enhanced photocatalytic activity was synthesized via a hydrolysis precipitation combined with a hydrothermal approach. Compared...
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Article
Mechanical properties and microstructure evolution of an Al-Cu-Li alloy subjected to rolling and aging
The mechanical properties and microstructure of Al-Cu-Li alloy sheets subjected to cryorolling (−100 °C, −190 °C) or hot rolling (400 °C) and subsequent aging at 160 °C for different times were investigated. T...
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Article
Physical and dynamic mechanical behaviors of marble after heat treatment in quasi-vacuum and air-filled environments
The dynamic mechanical properties of rock specimens after thermal treatment in the air-filled environment (AE: i. e., at the free surface) have been extensively investigated, yet they are rarely estimated in t...
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Article
Determination of gradient index based on laser beam deflection by stochastic particle swarm optimization
Gradient index (GRIN) material is widely applied as a kind of special functional material in many practical engineering fields. Accurate knowledge of the GRIN distribution of the material is the key to use GRI...
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Article
Dual-resource integrated scheduling method of AGV and machine in intelligent manufacturing job shop
In view of the fact that traditional job shop scheduling only considers a single factor, which affects the effect of resource allocation, the dual-resource integrated scheduling problem between AGV and machine...
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Article
Lubrication characteristics of external return spherical hinge pair of axial piston pump or motor under combined action of inclination and offset distance
External return mechanism is a mechanical structure applied to axial piston pumps. To study its lubrication characteristics, the Reynolds equation applied to an external return spherical hinge pair was deduced...
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Article
Displacement behavior and mechanism of long-term water flooding in sandstone oil reservoirs
Sandstone oil reservoirs with huge bottom water and high permeability are generally developed with high flow rate. After long-term water flooding (LTWF), the water flooding characteristics are quite different ...
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Article
Pressure performance improvement by dual-mode control in digital pump/motor
Due to the advantages of low cost, fast response and pollution resistance, digital hydraulic pump/motor can replace conventional variable hydraulic pump/motor in many application fields. However, digital hydra...
