A new dynamic tracing program has been developed to evaluate reasonably the original water flow of the cast machine under the constant and variable drawing speed.

This paper proposes method and model of error correction in program tracking,target error of tracking remote sensing satellites is discussed.

On-line tracking analysis for the changes of major chemical components during catalytic disproportionation of gum oleoresin over Pd/C catalyst was studied by the gas chromatography (GC) and gas chromatography-mass spectrometry-detection system (GC-MS-DS), and the reaction mechanism of catalytic disproportionation from gum oleoresin has been discussed.