Zhai Yu-chun
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View article: Opinion Maximization Based on Fairness in Social Networks
Opinion Maximization Based on Fairness in Social Networks Open
Opinion maximization has attracted much attention in viral marketing. It selects an initial seed user set to disseminate user opinions on the target product and finally produces more positive opinions in social networks. In earlier studies…
View article: Effect of the Deposition Process on High-Temperature Microstructure and Properties of the Direct Energy Deposition Al-Cu Alloy
Effect of the Deposition Process on High-Temperature Microstructure and Properties of the Direct Energy Deposition Al-Cu Alloy Open
The excellent microstructure and mechanical properties of Al-Cu alloy deposited using the Direct Energy Deposition (DED) process has been shown in previous studies, which is the most likely aluminum alloy material to meet the load-bearing …
View article: The Effect of Cu Content on the Microstructure and Properties of the Wire Arc Additive Manufacturing Al-Cu Alloy
The Effect of Cu Content on the Microstructure and Properties of the Wire Arc Additive Manufacturing Al-Cu Alloy Open
Al-Cu alloy has broad application prospects in the field of aerospace due to its excellent performance. In this paper, deposits with different Cu contents were prepared by the wire arc additive manufacturing (WAAM) process, and the effects…
View article: Improvement of utilization efficiency of magnesite by (NH4)2SO4 roasting–water leaching process
Improvement of utilization efficiency of magnesite by (NH4)2SO4 roasting–water leaching process Open
(NH4)2SO4 roasting–water leaching process was studied as a method for improving the utilization efficiency of magnesite. Transformation of the mineral phases during roasting was evaluated by X-ray diffraction (XRD) analysis, combined with …
View article: Facile fabrication of spherical flower-like Mg(OH)2 and its fast and efficient removal for heavy metal ions
Facile fabrication of spherical flower-like Mg(OH)2 and its fast and efficient removal for heavy metal ions Open
Spherical flower-like Mg(OH)2 was fabricated from MgSO4 effluent and its adsorption performance for heavy metal ions was evaluated. The appropriate fabrication conditions are as follows: Mg2+/NH4OH molar ratio of 1:0.5, temperature of 120 …
View article: Co-extraction of valuable metals and kinetics analysis in chlorination process of low-grade nickel-copper sulfide ore
Co-extraction of valuable metals and kinetics analysis in chlorination process of low-grade nickel-copper sulfide ore Open
To efficiently co-extract Ni and Cu from low-grade nickel-copper sulfide ore, chlorination roasting with NH4Cl followed by a water leaching process was investigated. The results show that 98.4% Ni and 98.5% Cu can be synchronously extracte…
View article: Adsorption of Congo red by fibrous xonotlite prepared from waste silicon residue
Adsorption of Congo red by fibrous xonotlite prepared from waste silicon residue Open
Fibrous xonotlite was synthesized under the conditions of Na2SiO3 concentration of 0.05 mol·L−1, molar ratio of Si/Ca of 1:1, temperature of 220 °C and time of 9 h. It is worth pointing out that the Na2SiO3 solution as raw material was obt…
View article: Y(III) Ion Migration in AlF3–(Li,Na)F–Y2O3 Molten Salt
Y(III) Ion Migration in AlF3–(Li,Na)F–Y2O3 Molten Salt Open
In this study, three slots containing an anode chamber, a cathode chamber, and a middle pole chamber were designed by applying the Hittorf method, and a two-way coupling model of the flow field and electric field was established using the …
View article: Kinetics of Alkaline Leaching Process of Extractiing Silicon from the Residue of Titanium Extraction with Ammonium Sulfate Roasting
Kinetics of Alkaline Leaching Process of Extractiing Silicon from the Residue of Titanium Extraction with Ammonium Sulfate Roasting Open
There is a large amount of silicon in the filter residue after extracting titanium from the titanium slag roasted with ammonium sulfate. Kinetics of alkaline leaching process of extracting silicon from the residue of titanium extraction we…
View article: Microstructure and Properties of Al-6.0Mg-0.3Sc Alloy Deposited by Double-Wire Arc Additive Manufacturing
Microstructure and Properties of Al-6.0Mg-0.3Sc Alloy Deposited by Double-Wire Arc Additive Manufacturing Open
Al-6.0Mg-0.3Sc alloy deposits are prepared by means of a double-wire arc additive manufacturing process. The formation, porosity, metallographic structure, type of precipitated phase, and mechanical properties of the deposit are studied. D…
View article: Preparation of spherical flower-like Mg(OH)2 from waste magnesite and its immobilization performance for Cu2+, Zn2+ and Pb2+
Preparation of spherical flower-like Mg(OH)2 from waste magnesite and its immobilization performance for Cu2+, Zn2+ and Pb2+ Open
Spherical flower-like Mg(OH)2 was successfully synthesized under conditions of Mg2+ concentration of 2 mol·L−1, molar ratio of Mg2+/NH4OH of 1:0.5, temperature of 120 °C and time of 1 h using MgSO4 solution as raw material obtained from wa…
View article: The Microstructure and Properties of an Al-Mg-0.3Sc Alloy Deposited by Wire Arc Additive Manufacturing
The Microstructure and Properties of an Al-Mg-0.3Sc Alloy Deposited by Wire Arc Additive Manufacturing Open
Al-Mg alloys can reach medium strength without a solid solution and quenching treatment, thereby avoiding product distortion caused by quenching, which has attracted the attention of wire arc additive manufacturing (WAAM) researchers. Howe…
View article: Effect of Sn Content on the Microstructure and Properties of Wire and Arc Additive Manufactured Al-Cu Alloy Deposits
Effect of Sn Content on the Microstructure and Properties of Wire and Arc Additive Manufactured Al-Cu Alloy Deposits Open
Al-Cu-Sn alloy deposits with different Sn contents were prepared by the wire and arc additive manufacturing process. The microstructure and mechanical properties of the deposits were examined by metallography, scanning electron microscopy,…
View article: The Influence of Heat Input on the Microstructure and Properties of Wire-Arc-Additive-Manufactured Al-Cu-Sn Alloy Deposits
The Influence of Heat Input on the Microstructure and Properties of Wire-Arc-Additive-Manufactured Al-Cu-Sn Alloy Deposits Open
In this experiment, Al-Cu-Sn alloy was used as raw material to form deposits with different heat input using the wire-arc additive manufacturing (WAAM) process. The effects of heat input on microstructure and mechanical properties of Al-Cu…
View article: Study on Microstructural and Mechanical Properties of an Al–Cu–Sn Alloy Wall Deposited by Double-Wire Arc Additive Manufacturing Process
Study on Microstructural and Mechanical Properties of an Al–Cu–Sn Alloy Wall Deposited by Double-Wire Arc Additive Manufacturing Process Open
In this present study, single-wire and double-wire Al–Cu–Sn alloy walls were fabricated by an arc additive manufacturing process. The surface morphology, elemental composition, and microstructure were investigated by scanning electron micr…
View article: Effect of Heat Input on Formability, Microstructure, and Properties of Al–7Si–0.6Mg Alloys Deposited by CMT-WAAM Process
Effect of Heat Input on Formability, Microstructure, and Properties of Al–7Si–0.6Mg Alloys Deposited by CMT-WAAM Process Open
In order to improve the forming efficiency of Al–7Si–0.6Mg fabricated by wire and arc additive manufacturing process (WAAM), wire with a diameter of 1.6 mm was selected as the raw material. The effect of heat input on the formability, micr…
View article: Effect of Mg Content on Microstructure and Properties of Al–Mg Alloy Produced by the Wire Arc Additive Manufacturing Method
Effect of Mg Content on Microstructure and Properties of Al–Mg Alloy Produced by the Wire Arc Additive Manufacturing Method Open
In this study, an Al–Mg alloy was fabricated by wire arc additive manufacture (WAAM), and the effect of Mg content on the microstructure and properties of Al–Mg alloy deposits was investigated. The effects on the deposition surface oxidati…
View article: Synthesis and photocatalytic degradation ability evaluation for rhodamine B of ZnO@SiO2 composite with flower-like structure
Synthesis and photocatalytic degradation ability evaluation for rhodamine B of ZnO@SiO2 composite with flower-like structure Open
ZnO@SiO2 composite with flower-like structure was successfully prepared with molar ratio of ZnO/SiO2 = 1:1 based on the optimized synthesizing parameters of spherical SiO2 and flower-like ZnO. SiO2 particles were coated on the flower-like …
View article: Microstructure, defects, and mechanical properties of wire + arc additively manufactured Al Cu4.3-Mg1.5 alloy
Microstructure, defects, and mechanical properties of wire + arc additively manufactured Al Cu4.3-Mg1.5 alloy Open
View article: Mechanism and Kinetics of Ammonium Sulfate Roasting of Boron-Bearing Iron Tailings for Enhanced Metal Extraction
Mechanism and Kinetics of Ammonium Sulfate Roasting of Boron-Bearing Iron Tailings for Enhanced Metal Extraction Open
The large amount of boron-bearing iron tailings in China is a resource for metals that needs to be more completely and efficiently utilized. In this evaluation, the ammonium sulfate roasting process was used to make a controllable phase tr…
View article: Micropore evolution in additively manufactured aluminum alloys under heat treatment and inter-layer rolling
Micropore evolution in additively manufactured aluminum alloys under heat treatment and inter-layer rolling Open
The application of wire + arc additively manufactured (WAAM) aluminum alloys has been restricted by the porosity defect, which is generally detrimental to the mechanical properties. Suppressing of micropores in the WAAM components has attr…
View article: Deformation microstructures and strengthening mechanisms for the wire+arc additively manufactured Al-Mg4.5Mn alloy with inter-layer rolling
Deformation microstructures and strengthening mechanisms for the wire+arc additively manufactured Al-Mg4.5Mn alloy with inter-layer rolling Open
View article: A New Multi-bed Vacuum Swing Adsorption Cycle for CO2 Capture from Flue Gas Streams
A New Multi-bed Vacuum Swing Adsorption Cycle for CO2 Capture from Flue Gas Streams Open
Adsorption Processes for CO2 capture have been extensively researched within the last decade and have been piloted at many field installations and in research laboratories. Many reported VSA cycle designs for CO2 capture are based on singl…
View article: Using orthogonal experiment design to optimized powder metallurgy repair process
Using orthogonal experiment design to optimized powder metallurgy repair process Open
The orthogonal experiment design method was applied to powder metallurgy repair process parameters optimization.With orthogonal design combined with weighted comprehensive evaluation method to influence repair effect of multiple objective …
View article: The strengthening effect of inter-layer cold working and post-deposition heat treatment on the additively manufactured Al–6.3Cu alloy
The strengthening effect of inter-layer cold working and post-deposition heat treatment on the additively manufactured Al–6.3Cu alloy Open
View article: CO2 capture by vacuum swing adsorption: role of multiple pressure equalization steps
CO2 capture by vacuum swing adsorption: role of multiple pressure equalization steps Open
View article: A Metal‐Free, Free‐Standing, Macroporous Graphene@g‐C<sub>3</sub>N<sub>4</sub> Composite Air Electrode for High‐Energy Lithium Oxygen Batteries
A Metal‐Free, Free‐Standing, Macroporous Graphene@g‐C<sub>3</sub>N<sub>4</sub> Composite Air Electrode for High‐Energy Lithium Oxygen Batteries Open
The nonaqueous lithium oxygen battery is a promising candidate as a next‐generation energy storage system because of its potentially high energy density (up to 2–3 kW kg −1 ), exceeding that of any other existing energy storage system for …
View article: A facile approach to synthesize stable CNTs@MnO electrocatalyst for high energy lithium oxygen batteries
A facile approach to synthesize stable CNTs@MnO electrocatalyst for high energy lithium oxygen batteries Open