A novel "auxiliary pair" constraint,together with surface curvature information,were employed to remove unreliable matches.

On the basis of geometrical research,a new method that draws sufficiently with assistant vanishing points is provided.

A new method of drawing perspective is put forward in this paper using two assistant vanishing point selected wilfully.

Based on an analysis of the causes,the author pointed out that the accident is caused by incorrect switching of breaker auxiliary contacts in the process of operation,then put forward the prevention measure of time-delay switching off the tripping circuit after sending of operation pulse.

This paper analyzes the problems one by one, including why switch auxiliary contact location for a long time does not correspond to the device do not report until 18 M switching operation, if not dealt with what would have serious consequences, and proposes preventive measures that other special units of the dual-bus can cause sufficient attention.

We proposed a design method for the die-face making of sheet metal forming which is based on an assistant node scheme.

Research on adding auxiliary line and auxiliary point in computer automatic reasoning

By employing this, the two point perspective view can be completed with the auxiliary point even in the extremely difficult situation.