Civil Aviation University of China

About: Civil Aviation University of China is a education organization based out in Tianjin, China. It is known for research contribution in the topics: Air traffic control & Civil aviation. The organization has 5647 authors who have published 4559 publications receiving 29825 citations. The organization is also known as: Zhōngguó Mínháng Dàxué.

The Effect of Chlorine Ion on Metal Corrosion Behavior under the Scratch Defect of Coating

Abstract: The influence of chloride ion on the corrosion of metal under coating with scratch defects was researched by wire beam electrode (WBE) technology and electrochemical impedance spectroscopy (EIS) technology. The results showed that the current of metal surface could be characterized by the WBE technology. In the case of scratches on the coating, the location of the damage always showed an anodic current, and the cathodic reaction took place adjacent to the damaged location. The cathode area surrounded the defect and migrated to the far end over time. With the increase of Cl- concentration, the corrosion reaction speeded up, the rate of cathode migration also increased, and the speed of coating stripping did as well. Combined with electrochemical impedance spectroscopy, uniform laws were obtained.

Hybrid Steepest-Descent Methods for Solving Variational Inequalities Governed by Boundedly Lipschitzian and Strongly Monotone Operators

Abstract: Let be a real Hilbert space and let be a boundedly Lipschitzian and strongly monotone operator. We design three hybrid steepest descent algorithms for solving variational inequality of finding a point such that , for all , where is the set of fixed points of a strict pseudocontraction, or the set of common fixed points of finite strict pseudocontractions. Strong convergence of the algorithms is proved.

Virtual remanufacturing: Cross-section curve reconstruction for repairing a tip-defective blade:

Abstract: Remanufacturing of damaged blades has been widely discussed in the field related with aero maintenance. Cross-section curve is the key factor for rebuilding 3D airfoil of a damaged blade. This pape...

Assessment of Nd1.5Pr0.5Ni1−xMxO4+δ (M = Cu, Co, Mo; x = 0, 0.05 and 0.1) as cathode materials for intermediate-temperature solid oxide fuel cell

Abstract: This work presents study of the doping effect of M = Cu, Co, and Mo on the cathode properties of Nd1.5Pr0.5Ni1−xMxO4+δ. In particular, four compositions are prepared by a modified sol–gel method, e.g., Nd1.5Pr0.5NiO4+δ (NPN), Nd1.5Pr0.5Ni0.9Cu0.1O4+δ (NPNCu), Nd1.5Pr0.5Ni0.9Co0.1O4+δ (NPNCo), and Nd1.5Pr0.5Ni0.95Mo0.05O4+δ (NPNMo). The crystal structure, phase stability, electrical conductivity, thermal expansion coefficient (TEC), and electrochemical performance of the oxides are systematically investigated. No chemical reactions between NPN, NPNCu, NPNCo, and NPNMo cathodes and Ce0.8Sm0.2O1.9 electrolyte are found. The average TEC values of the NPN, NPNCu, NPNCo, and NPNMo are determined to be 13.9 × 10−6 K−1, 13.6 × 10−6 K−1, 14.7 × 10−6 K−1, and 13.2 × 10−6 K−1 in the range of 30–1000 °C, close to that of the typical electrolyte materials. NPN and NPNCu cathodes exhibit very low interfacial polarization resistance value of 0.033 and 0.032 Ω cm2 at 800 °C, which translates to superior fuel cell performance, e.g., peak power density of 456 and 443 mW cm−2, respectively. The electrochemical performance, however, could be significantly degraded by the Co and Mo doping in the Ni site. The presented results demonstrate that NPN and NPNCu are promising cathode candidate for intermediate-temperature solid oxide fuel cells.