Development of injection mould with three directions inward core-pulling mechanism for circular cap

By analyzing and comparing the both punching technology for the rotundity cover on container, a new compound process of the falling-drawing-curlling was adopted by analyzing the rotundity cover's shape and material and size.

Covariance matrix transform is conducted to segregate noise disks from signal disks,then estimation is made using Gerschgorin disks.

This paper begins with the investigation on exhaustive search algorithm, the Gerschgorin circle algorithm, on the basis of which, a Gerschgorin circle with low complexity is presented.