This paper gives the principle frame image of angle welding radial detection,evaluates its safety property and reliability,and describes its application.

Novel image reconstruction algorithm for muti-phase flow tomography system using γ ray method;

Resonace absorption research of matter to rays and its prospect of application;

Working principle of the KD 421 γ ray micro computerized productivity meter;

Objective: This study is to use electronic portal imaging device (EPIDs) to analyze the symmetry and flatness of radiation field for linear accelerator, trying to provide an easy way for routine quality assurance to save time and reduce workload.

It was indicated that those stem cuttings of Eucalyptus species, which had relatively developed and relatively lignified rays, relatively high content and relatively extensive distribution of phenol substances, were easy to form root primordia.