The calculation method of characteristic value of load is put forward on "the referential point method" by which computation formulas and tables of characteristic value of load corresponding to the design reference period are given.

The author points out the reference point calculation method in switching plane survey coordinates can be applied in dynamic location survey of GPS instead of point precise height.

Study on the application of datum point to Mohr circle;

The reliability analysis of datum points in GPS network;

Aimed at the problem of influencing fast and accurate arc-alignment for CCMs because of datum point missing,a series of technical and system reformation measures were put forward and implemented,providing a reliable guarantee for fast demarcation of datum marks,finally realizing the goal of fast and accurate calibration of arcs.

The problem of the numerical controlled machine going back reference point is debated in this paper.

The reference point on the aviation photograph is put forward and the auto examination method of BUT & TUT based on the shadow reference point is also given in this paper.

Aiming at how to improve fingerprint recognition rate,a new way of gaining reference point in the areas of the traditional triangular match is presented,and it matches fingerprint features combining variable boundary box.