It shows that when one screw is of opposite phase to the other one, the pure elongational force field is be caused by the vibration, along with the oscillating effect during the course of the surface stretch.

In view of ringing artifacts reduction of traditional POCS(projections onto convex sets) super-resolution image reconstruction algorithm,a novel POCS algorithm based on line process model is presented in this paper after analyzing the cause of these artifacts.

POCS super-resolution algorithms suffer two serious problems as magnification increases,one is the increasing ringing artifacts,the other is the increasing computational complexity.

Previously published techniques usually perform well on small magnifications, however, as magnification increases, they suffer two severe problems: one is the exponentially increased computational complexity, the other is the degradation of reconstruction quality caused by severe ringing artifacts.

Due to the disa-bility of handling different regions of the image,previously published MAP super-resolution image reconstruction techniques generally produced severe blurred image or image with severe ringing artifacts.

However,due to the ill-posed nature of the super-resolution image reconstruction,the ringing artifacts can not be easily removed in the reconstruction process.

Discussion about the experiments of speciality observation and use of body-effect sogicon;