Al addition modifies the interfacial energy of SiC/solution during the growth of SiC single crystals via TSSG, and is beneficial to smoothing the growth surface, improving the crystalline quality, stabilizing the 4H polytype, and increasing the growth rate.

The number of large public buildings is growing rapidly in function and complexity, which cause the evacuation path in case of fire to be too long and complex increasing the evacuation time. In this paper, a constraint-based design approach is introduced to automatically generate the optimal position of the building evacuation door to minimize the length of the escape route, thus reducing the evacuation time. The position of the evacuation doors is ruled by design specifications and building structures, in this study,