The Zn–N 2 P site, engineered with optimal electron density, demonstrates superior performance and enhanced reaction kinetics in the intramolecular hydroamination of o -alkynylaniline, outperforming current heterogeneous transition metal catalysts.

Cerium oxide is an important strategic resource and a key raw material for many functional materials in high-tech fields. Microwave heating method to prepare cerium oxide. In the study of prepared by microwave heating, variation polarity factor inside solution during was explored. addition thermal effects, also exerts electromagnetic influences that promote mixing solution. This presents both physical experiments numerical simulations behavior chloride solutions under exposure. The results...

Constructing elaborate catalysts to prompt the charge carrier separation and transport is critical developing efficient photocatalytic systems. Here, a hierarchical hollow structure based on 1D/2D BiOCl/Bi₂WO₆ hybrid materials was fabricated by precursor chemical engineering method. This made up of molten 1D BiOCl nanorods 2D Bi₂WO₆ nanosheets. The synergetic effect presence specific interfaces between provided interfacial transfer photogenerated carriers under visible light. Seamless...

Micro–nano cerium oxide particles with regular morphology and good dispersity have been widely used in polishing other industrial fields. Microwave heating is an effective, controllable green technology. The Venturi reactor for microwave developed by our team was the core equipment utilized to study effects of pyrolysis conditions on purity microstructure particles. experiments were carried out products characterized using XRD, SEM EDS. heating, fluid flow chemical reaction coupled numerical...

This paper studies the multiple‐split load sharing mechanism of gears in two‐stage external meshing planetary transmission system aeroengine. According to eccentric error, gear tooth thickness pitch installation and bearing manufacturing we performed error analysis equivalent angles, respectively, also considered floating caused by variation backlash, which is from all at same time. Finally, obtained comprehensive angle line, established a refined mathematical computational model 2‐stage...

Due to unpredictable global competition and high-frequency market changes, stay competitive, manufacturers must possess some new advanced manufacturing systems with reconfigurability in order meet all these changes rapidly cost-effectively. These should adjust their production functionality capacity time by changing system configurations; hence, it is very important analyze the impact of different configuration on performance. A systematic analysis method needed evaluate overall performance...

With the 3D thermal mechanical coupled elastic-plastic finite element method and by simulating whole rolling process of 1250mm×20mm C-Mn hot strips, this paper obtains temperature field deformation result process. By comparing drop curve with measured data in field, it shows that simulation is close to real situation. Based on process, completes computational prediction microstructure property strips using relevant evolution models advanced C language programming, thus providing reference...

For the study of reinforced concrete beam stress performance under ultra-low temperature, based on material constitutive and mechanism at Using DIANA software environment, numerical simulations is implemented, component test expanded. The relationship analysis between different temperatures. results show that bearing capacity stiffness are increased with lower temperature.

Reconfigurable manufacturing system is advanced and mutual collaboration with software hardware. The reconfigurable mode of RMS included the physical logical mode. modeling method must embody integrality From objectoriented techniques, presented based on OPN UML according to in order establish comprehensive model open out process RMS. established UML. can analysis dynamic characteristic make achieve reusability, integrated ability expansibility. An example a cylinder production line describe...

Microwave heating has the characteristics of simple control and high efficiency, in which electromagnetic force plays an important role. Using UDF function energy equation FLUENT software, model tube is established. The mixing process cerium chloride solution under different modes, effect Lorentz preparation oxide inlet material velocities were numerically simulated. CFD-Post MATLAB software are used to post-process data whole fluid area. Through above analysis, best conditions numerical...

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Abstract Metal single‐atom catalysts (SACs) have emerged as a promising class of in various fields, owing to their well‐defined active centers, tunable coordination environments, and high reaction selectivity. Among the diverse supports, graphene‐based SACs garnered significant attention due exceptional properties hydrogenation reactions. This review elucidates recent advancements theoretical investigations electronic geometric structures metal SACs, with focus on modulation strategies such...

The copper oxide ore is high oxidation ratio and the combination with a low grade of Cu 0.71%. Copper concentrate 15.02% recovery 38.55% was obtained by flotation. optimum acid leaching conditions were investigated. Effects lixiviant concentration, solid-to-liquid ratio, time efficiency 78.75% relative to flotation tailings. By tailings, most in minerals can be enriched, total reached 86.85%.

A new method for the preparation of Fe 3 O 4 NPs from byproduct titanium dioxide-copperas was studied in this study. Core-shell structures and chemical composition nanoparticles have been investigated by TEM, XRD FTIR techniques. The results indicated that can be synthesized obtained copperas co-precipitation a uniform spherical morphology with an average diameter about 10 nm. mole ratio 2+ to 3+ one most important factors during processing, which has great effect on yield size distribution...

The study aimed to extract copper from oxide ores in which minerals had a complex association and dissemination with gangue the form of fine grain by catalytic oxidation acid leaching. Based on research properties material lots experiments, leaching process was performed. optimum parameters were determined as sulfuric dosage 150 kg/t, KMnO 4 1500 g/t, liquid/solid mass ratio 3 time 45 minutes. Under such condition, efficiency 90.15% achieved, provided way improve for refractory contained...