Papers by Keyword: Support

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Authors: Guo Bin Duan, Yong Kui Huang, Li Yu, Shui Jin Yang
Abstract: H3PW6Mo6O40/SiO2 was prepared by sol-gel method, and sensitized by H2O2 solution. The photocatalytic degradation of methyl violet by H3PW6Mo6O40/SiO2 under simulated natural light irradiation was investigated. The results demonstrated that at optimal condition (initial concentration of methyl violet is 10 mg/L, and the pH is 2.5, the dosage of catalyst is 0.5% based on feed stocks), the degradation rate of methyl violet is as high as 88.7 % after 2.5h simulated natural light irradiation. The reaction of photocatalysis for methyl violet can be expressed as first-order kinetic model.
Authors: Yao Ming Wang, You Xian Xue, Qiang Shen, Lian Meng Zhang
Abstract: The porous ceramic support was prepared from cordierite by adjusting the phase composition, grain size of aggregate, additions of pore-forming material and binder. The porous ceramic support had excellent chemical stability and relative high strength with a porosity of 48%and pore size of 128μm. Factors that affected the properties of the support material were analyzed. The pore size of the porous ceramic support was directly proportional to the grain size of the aggregate around firing temperature. The strength of the support material increases with a rise in amount of the binder and firing temperature. The porosity of the support material increases while the strength decreases with a rise in amount of the pore-forming agent.
Authors: Sheng Xian Xu, Feng Yi Li
Abstract: The nanosized RuB amorphous alloys with three different ruthenium contents supported on Al2O3 were prepared by means of impregnation, following the chemical reduction with KBH4 solution. The gas-phase benzene hydrogenation was used as a probe reaction to evaluate the catalytic activity of the prepared catalysts. The catalysts were characterized by BET, inductively coupled plasma (ICP), X-ray diffraction (XRD), and transmission electron micrograph (TEM). The experiment results show that the catalytic activity of the three amorphous alloy catalysts goes up first with the increasing of temperature and has a maximum at 443K; when the Ru loading amount is 0.24 %(wt.%) of the catalyst, which is very few, the conversion of benzene on RuB/Al2O3 amorphous alloy catalyst can reach to 99.50% at 443K.
Authors: Jian Gen Wang, Ya Hui Liu
Abstract: This study used alumina fine as main raw materials to prepare the porous ceramic separation membrane supports. The effects of different the sintering temperature and holding time on ceramic separation membrane supports are studied, and the TG/DSC curves of raw materials powder are analyzed by the preparation process. The results show that sintering temperature 1200°C, holding time 6 h, pore-forming agent more than 20%, prepared the uniform pore size distribution, porosity, accord with more than 50% of porous ceramics water demand separation membrane supports.
Authors: Da Xing Qian, Hou Tian Zhang
Abstract: This article through the analysis of prestressed anchor cable and concrete pouring pile in support of their respective characteristics of the force, in a number of supporting more challenging and demanding conditions, the prestressed anchor and bored concrete pile combined support method, play to their respective support advantage to gain better engineering effect. This paper describes the support principle and key procedure.
Authors: Xiao Lu Cao, Qiao Xia Li, Ya Feng Yao, Qun Jie Xu
Abstract: Fuel cell is one of the most promising power sources towards high-efficiency, low-emission and environmental benign application. In pursuit of a higher performance, electrocatalyst is a crucial research focus. Compared with commercial carbon support, TiO2 exhibits the advantages of higher stability, higher porosity and stronger metal-support interaction. In this article, we give a brief overlook on the influence of diverse crystal and morphology structures on their eletrocatalytic property in fuel cells. Besides, to better meet the demand of practical electrocatalysts, three different methods are summarized to overcome its relatively poor electrical conductivity. Overall, TiO2 is a promising support material of electrocatalysts in fuel cells.
Authors: Yu Kui Sheng, Wan Lian Lan
Abstract: Distributed Material Requirements Planning is widely used in manufacture enterprise. The decentralized decisions of purchasing and warehousing can be coordinated by Distributed Decision Support Systems. Distributed Decision Support Systems can improve flexibility to make right decision instantly.
Authors: Zheng Wang, Jian Hua Song, Xing Dong Zhu
Abstract: In this paper, the model based on Petri Nets about maintenance and support of military aviation equipment is researched. And this paper analyzes its process and puts forward a simulation model based on Petri net. This model not only considers most factors in the process, but also appends other elements easily. The model can be applied to the research on maintenance and support of military aviation equipment, or be used for a part of higher level military simulation system.
Authors: Yu Wei Liu
Abstract: According the analysis of the test in Baiping coal mine, obtain the characteristics of deformation and failure in three-soft seam roadway; get the exact data of roadways main deformation parameters and make sure the main deformation region division. By using the theory of equilibrium arch, analyze and finally determine bolt (cable) support attached with U shaped tents parameters. On-site tests show that this kind of support scheme can effectively control the deformation in three-soft seam roadway.
Authors: Yong Dong Jiang, Ling Xiong, Wei Xin Zhou, Xing Jiang Han, Shi Xing Mei, Jian Hu
Abstract: This paper, based on the distortion and failure character of soft rock Roadway in Bide coal mine, analyzed deformation and failure mechanisms of soft rock roadway that all are effected by factors of ground stress, lithology, mining influence, unreasonable support parameters and water. The new supporting scheme and parameters optimization of roadway were presented by means of ground stress measurement, mechanics parameters determination of roof and floor rock, monitoring of anchor-hold and result of surrounding rock classification. Then, through numerical simulation, this paper analyzed how the new supporting scheme could control the deformation of surrounding rock effectively, reduce tress in periphery area of surrounding rock, and decrease the stress concentration region of roadway, and prevent the base angle rock mass from macro shear slipping. The field examination results showed that the new supporting scheme was feasible, which can ensure the stability of roadway, with no consequences like roof falls, rib spalling and floor heave.The research results can be used as reference to design supporting structure in high ground stress soft rock roadway .
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