In this research, catalytic steam reforming of acetic acid derived from the aqueous portion of bio-oil for hydrogen production was investigated using different Ni/ATC (Attapulgite Clay) catalysts prepared by precipitation, impregnation and mechanical blending methods. The fresh and reduced catalysts were characterized by XRD, N 2 adsorption–desorption, TEM… (More)
Due to the large errors of traditional aerodynamic 4D trajectory prediction models, a prediction model based¿@on concept tree ¿Amulti-layer spatial association rule mining flight track data¿@was proposed. Firstly, the factors that had impact on total flying track were found out from flying history, and the flying track o f next flight w as predicted. Then… (More)
We propose a method to store XML document with time certification into relational database. We take into account update of XML document. The proposal database stores necessary information to generate XML document with time specifiication at a certain time. The relational database schema and XML generation algorithm are described.