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High‑Efficiency Inhibition of Gravity Segregation in Al–Bi Immiscible Alloys by Adding Lanthanum
Peng Jia,Jinyang Zhang,Haoran Geng,Xinying Teng,Degang Zhao,Zhongxi Yang,Yi Wang,Song Hu,Jun Xiang,Xun Hu 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6
The inhibition of gravity segregation has been a long-standing challenge in fabrication and applications of homogeneousimmiscible alloys. Therefore, the effect of rare-earth La on the gravity segregation of Al–Bi immiscible alloys was investigatedto understand the homogenization mechanism. The results showed that the addition of La can completely suppress thegravity segregation. This is attributed to the nucleation of Bi-rich liquid phase on the in-situ produced LaBi2phase and thechange of the shape of LaBi2@Bi droplets. In addition, a novel strategy is developed to prepare the homogeneous immisciblealloys through the addition of rare-earth elements. This strategy not only is applicable to other immiscible alloys, but alsois conducive to finding more elements to suppress the gravity segregation. This study provided a useful reference for thefabrication of the homogeneous immiscible alloys.
Towards a Framework for Assuring Cyber Physical System Security
Tianbo Lu,Jinyang Zhao,Lingling Zhao,Yang Li,Xiaoyan Zhang 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.3
Today, cyber physical systems (CPS) are becoming popular in power networks, healthcare devices, transportation networks, industrial process and infrastructures. As cyber physical systems are used more and more extensively and thoroughly, security of cyber physical systems has become the utmost important concern in system design, implementation and research. Many kinds of attacks arise (e.g. the Stuxnet worm), causing heavy losses and serious potential security risks. For the past few years, researchers are focusing their researches on different aspects of security of cyber physical systems. In this paper, we propose a security framework assuring the security of cyber physical systems and analyze main universities and institutes studying CPS security and their relations in three levels: CPS security objectives, CPS security approaches and security in specific CPS applications. Finally, a conclusion of this article is given.
Feng Huang,Ban Zhang,Xingchen Liu,Jinyang Xiang,Guoqing Wan,Miaodi Qu 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1
The primary error sources of engineering design for bolted beam reaction system with large size are mainly from the deformation of structure, mechanical behavior of connection joints. In addition, the simplifi ed calculation method of bolted connection has not formed a unifi ed understanding. A vertical static load test was carried out in the laboratory, and the deformation laws of the reaction beam were analyzed to obtain the mechanical characteristics of the connection joints by controlling the defl ection of the reaction beam. The composite eff ect coeffi cient k l of the variable section panel structure was introduced to the theoretical solution of the defl ection of the variable cross-section beam. Simultaneously, the fi nite element method was employed to establish the detailed model of the beam reaction system. The mechanical behavior of the reaction beam and the bolted joint are extensively studied, and the simplifi ed method of bolted joint is improved. The bolted connection is simplifi ed as a semi-rigid joint, and then the theoretical formula is proposed to calculate the defl ection and deformation of the beam structure under bolted connection. The defl ection and deformation of the reaction beam by the test and theoretical formula are consistent. The results show that the theoretical formula can well calculate the defl ection and deformation of structure members under bolted connection.
Xiaogang Zheng,Fuyan Kang,Congying Huang,Sihao Lv,JinYang Zhang,Hao Peng 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.88 No.-
ZnS–ZnO–Sm2O3 (Zn–Sm–XY) composites were prepared via the high-temperature calcination of coreshellstructured ZnS@Sm2O3 for the enhanced photocatalytic degradation of dyes and antibiotics invisible light region. Effects of calcined temperature, Sm2O3 content, pH value, contaminantconcentration, and inorganic ions on the photocatalytic activity were investigated. Ternary Zn–Smcomposites exhibit the excellent photocatalytic activity for the visible light driven degradation oftetracycline hydrochloride. Among these composites, Zn–Sm–2B prepared via the heat-treatment ofZnS–Sm2O3 at 673 K shows the best photocatalytic activity for the removal of tetracycline hydrochloride. The enhanced photocatalytic activity of Zn–Sm–2B is also achieved for the visible light drivendegradation of methyl orange, methylene blue, and rhodamine B within 20 min. In addition, Zn–Sm–6Ccalcined from Zn–Sm–C at 1073 K as well as Zn–Sm–2B exhibits excellent photocatalytic activity. OH andO2radicals are vital for the enhanced photocatalytic activity of Zn–Sm–2B and Zn–Sm–2B in visiblelight region, respectively. The lattice defects, sulfur vacancies, and oxygen vacancies facilitate the efficientcharge transfer and the rapid separation of electron-hole pairs at the junction interface of Zn–Sm–2B.
Carbon-coated Mg–Al layered double oxide nanosheets with enhanced removal of hexavalent chromium
Xiaogang Zheng,Fuyan Kang,Xinhui Liu,Hao Peng,JinYang Zhang 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
Carbon-coated Mg–Al layered double oxide (MgAl@C LDO) nanosheets were synthesized for the removalof hexavalent chromium (Cr(VI)) ions. Carbon coating could enhance the sorption capacity of Mg5Al1 LDOfor the Cr(VI) removal. The sorption capacity of Mg5Al1@C LDO increased and then decreased with anincrease in carbon-coated content, of which the Mg5Al1@C-2 with a carbon thickness of around 5.0 nmexhibited the best sorption capacity. The sorption behaviors of Mg5Al1@C-2 was explained by Langmuirsorption model, pseudo-second-order model, Weber–Morris model, and Boyd kinetic model. Mg5Al1@C-2 for Cr(VI) removal was a spontaneous, endothermic, and chemisorption process.
Jin Yang,Lei Cai,Sen Zhang,Xiangjia Zhu,Peng Zhou,Yi Lu 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.3
This study aimed to investigate whether silicacerium(III) chloride (CeCl3) nanoparticles could inhibitthe formation of advanced glycation end-products (AGEs)and reduce oxidative stress. Silica-CeCl3 nanoparticleswere synthesised by adsorption and embedment withmicro-silica materials, forming uniform nanoparticles witha diameter of approximately 130 nm. Chaperone activityassays and AGEs formation assays, and intracellular reactiveassays were adopted in this study to evaluate CeCl3nanoparticles effect. UV–visible spectrometry showed thatsilica-CeCl3 nanoparticles at low concentrations rapidlyformed tentatively stable conjugations with a-crystallin,greatly enhancing the chaperone activity of a-crystallin. Moreover, silica-CeCl3 nanoparticles markedly inhibitedthe fructose-induced glycation of a-crystallin, showing anadvantage over the control drugs aminoguanidine andcarnosine. Silica-CeCl3 nanoparticles also reduced intracellularreactive oxygen species production and restoredglutathione levels in H2O2-treated human lens epithelialcells. These findings suggest that silica-CeCl3 may be usedas a novel agent for the prevention of cataractogenesis.