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- 저자 : Changbin Sun (검색결과 3 건)
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Peiyong Sun,Haixing Wang,Xueqing Luo,Changbin Jia,Shenghong Zhang,Zhilong Yao 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.74 No.-
Quaternary Cu/B/Ca/Al2O3 catalyst extrudates were prepared and optimized for hydrogenation of secbutylacetate (SBA) to 2-butanol and ethanol. The rationally designed catalyst with a B/Cu molar ratio of3/1 exhibited an extraordinary resistance to Cu sintering during the reaction over 1000 h, due to theenhanced interaction by B2O3 between copper species and support. The slight loss in activity after thelong-term test, caused mainly by the partial transformation of surface CaO to calcium acetate, could beeasily recovered by calcination and the following reduction treatments, rendering it feasible to apply thecatalyst to the industrial hydrogenation of SBA.
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Hongmin Lai,Changbin Sun,Huaying Tang,Xianwei Fan,Yili Ma,Youzhi Li 한국미생물학회 2009 The journal of microbiology Vol.47 No.6
Copper (Cu)-transporting P-type ATPase (CTPA) genes have been documented to play an important role in resistance to heavy metals. However, our understanding of roles of CTPA genes of the filamentous fungi was based only on sequence similarity prediction before. In a previous study, we isolated a Penicillum janthinellum strain GXCR of higher tolerance to Cu (200 mM). In this study, we cloned the partial cDNA of CTPA gene, named PcpA, from the strain GXCR. Sequence alignment indicated that the cloned cDNA sequence has the highest identity (94.4%) with a predictive CTPA gene of Aspergillus clavatus. The PcpA- encoded protein, termed PcpA, has classical functional domains of CTPAs, and shows differences from reported CTPAs in some specific sequence motifs and transmembrane regions. Expression of the PcpA was induced by extracellular Cu, cadmium (Cd), and silver (Ag). PcpA RNA interference (RNAi) mutants with a reduced level of PcpA mRNA were more sensitive to Cu, iron, Cd, and Ag than the wild-type (WT) strain GXCR. When grown in the presence of Cu, iron, and Cd, intracellular Cu and iron contents in the PcpA RNAi mutant were significantly (P<0.05) lower than those in the WT; However, intracellular Cd content in the mutant was significantly (P<0.05) higher than that in the WT. Taken together, it can be concluded that the PcpA functions in Cu uptake and homeostasis, iron uptake, and Cd export from the cytosol to the extracytosol.
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Vibration based bridge scour evaluation: A data-driven method using support vector machines
Zhang, Zhiming,Sun, Chao,Li, Changbin,Sun, Mingxuan Techno-Press 2019 Structural monitoring and maintenance Vol.6 No.2
Bridge scour is one of the predominant causes of bridge failure. Current climate deterioration leads to increase of flooding frequency and severity and thus poses a higher risk of bridge scour failure than before. Recent studies have explored extensively the vibration-based scour monitoring technique by analyzing the structural modal properties before and after damage. However, the state-of-art of this area lacks a systematic approach with sufficient robustness and credibility for practical decision making. This paper attempts to develop a data-driven methodology for bridge scour monitoring using support vector machines. This study extracts features from the bridge dynamic responses based on a generic sensitivity study on the bridge's modal properties and selects the features that are significantly contributive to bridge scour detection. Results indicate that the proposed data-driven method can quantify the bridge scour damage with satisfactory accuracy for most cases. This paper provides an alternative methodology for bridge scour evaluation using the machine learning method. It has the potential to be practically applied for bridge safety assessment in case that scour happens.
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