Papers by Author: Jian Wei Yan

Abstract: The development of rail transit and the construction above subway station (CASS) will have profound influence on city. This paper tries to take Tianjin’s practical situation into consideration, and after analyzing the theories and CASS in and abroad, attempts to find objective law between rail transit and urban development in Tianjin from the interaction of M1 (Metro 1 of Tianjin subway system) construction and urban development. Base on the existing problems and experience, this paper puts forward the methods of exploitation above subway station and the qualitative indicators. Then take an under construction station’s exploitation as an example, raising qualitative principles and quantitative indicators to the site construction nearby. By doing this, aim at leading the future CASS and realizing the harmonious interaction between the development of urban rail transit and land use above it.

Abstract: In the present research the thermal properties of phenolic resin 2123-P mix-modified by nano-alumina are investigated. The nano-alumina employed in the research can be classified two kinds, one is treated by 1%wt. silane coupling agent KH-550 relative to the weight of alumina, and the other is commercial alumina untreated. DTA-TG results show the thermal stability and anti-weight loss ability of the mix-modified phenolic resin 2123-P with KH-550 treated alumina are increased relative to those of the pure 2123-P and those of the mix-modified 2123-P with commercial alumina, and the results are to be proved by the constant speed friction and wear tests. It can be observed from SEM that KH-550 treated nano-alumina particles are dispersed equably in phenolic resin.