A method of construction about Ellipse Axonometry this paper discusssed the method of analysis employed to deteimine the centre of a circle with fowr segments of circular arc and a coordinate of junction axonometry ellipse, thus acquiring an easy way of drawing ellipse

Better economic indexes are acquired by means of readjusting shell and electrode circle diameter, reducing electrode circle power density as well as electrode low limit height to prolong liner's life.

A concentric circles-based method is proposed in the paper to find the distortion center.

To improve the measuring precision of photoelectronic measurement system for curvature (important status parameter of cannon),a real-time distortion correction method with concentric circles as onsite standard is proposed and a set of measuring apparatus with self-center adaptation is designed.

This paper presented a Hough transform-based detection method of concentric circles.

Using an approximate analytical method, the explicit expression of stress concentration factors is derived for an eccentric circular hole in a tension orthotropic finite-width strip.