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Sand cat arithmetic optimization algorithm for global optimization engineering design problems
Chen Shuilin,Zheng Jianguo 한국CDE학회 2023 Journal of computational design and engineering Vol.10 No.6
Sand cat swarm optimization (SCSO) is a recently introduced popular swarm intelligence metaheuristic algorithm, which has two significant limitations – low convergence accuracy and the tendency to get stuck in local optima. To alleviate these issues, this paper proposes an improved SCSO based on the arithmetic optimization algorithm (AOA), the refracted opposition-based learning and crisscross strategy, called the sand cat arithmetic optimization algorithm (SC-AOA), which introduced AOA to balance the exploration and exploitation and reduce the possibility of falling into the local optimum, used crisscross strategy to enhance convergence accuracy. The effectiveness of SC-AOA is benchmarked on 10 benchmark functions, CEC 2014, CEC 2017, CEC 2022, and eight engineering problems. The results show that the SC-AOA has a competitive performance.
Lijian Wang,Junwei Zhao,Yujiang Wang,Shuilin Zheng 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.6
The nano-TiO2/purified diatomite composite materials with core-shell structures were prepared by hydrolysis precipitationusing purified diatomite as carrier and titanium sulfate as precursor. The composite materials were characterized bytransmission electron microscope (TEM), X-ray diffraction (XRD), low temperature nitrogen adsorption and mercuryporosimetry. The photocatalytic composite coating based on the nano-TiO2/prified diatomite composite materials wasprepared and its properties of formaldehyde degradation were investigated. Meanwhile, the degradation mechanism offormaldehyde gas was discussed. The results showed that the nano-TiO2/prified diatomite composite materials were formedcore-shell structures, and the TiO2 nanoparticles were anatase with the average size of about 10 nm?The test results show thatthe formaldehyde purification performance of the coatings has met the technical requirements of Class I materials in theChinese national standard JC/T 1074-2008.
( Wanzhong Zhang ),( Caihong Yu ),( Zhiming Sun ),( Shuilin Zheng ) 한국미생물생명공학회(구 한국산업미생물학회) 2018 Journal of microbiology and biotechnology Vol.28 No.6
A novel g-C<sub>3</sub>N<sub>4</sub>/ZnO/stellerite (CNZOS) hybrid photocatalyst, which was synthesized by coupled hydro thermal-thermal polymerization processing, was applied as an efficient visiblelight-driven photocatalyst against Staphylococcus aureus. The optimum synthesized hybrid photocatalyst showed a sandwich structure morphology with layered g-C<sub>3</sub>N<sub>4</sub> (doping amount: 40 wt%) deposited onto micron-sized ZnO/stellerite particles (ZnO average diameter: ~18 nm). It had a narrowing band gap (2.48 eV) and enlarged specific surface area (23.05 ㎡/g). The semiconductor heterojunction effect from ZnO to g-C<sub>3</sub>N<sub>4</sub> leads to intensive absorption of the visible region and rapid separation of the photogenerated electron-hole pairs. In this study, CNZOS showed better photocatalytic disinfection efficiency than g-C<sub>3</sub>N<sub>4</sub>/ZnO powders. The disinfection mechanism was systematically investigated by scavengerquenching methods, indicating the important role of H<sub>2</sub>O<sub>2</sub> in both systems. Furthermore, h<sup>+</sup> was demonstrated as another important radical in oxidative inactivation of the CNZOS system. In respect of the great disinfection efficiency and practicability, the CNZOS heterojunction photocatalyst may offer many disinfection applications.