In this paper,we propose a new approach to some two machine shop problems,which gives so called bi directional scheduling algorithms for these problems in terms of open shop,job shop,mixed shop and open shop with 3 stage jobs.

According to the construction practice of the double track monolithic box girder of the passenger dedicated line,the author analyzes the causes of the non-loading crack,and provides preventive measures,and the application of the three stages tension technology,effectively prevents the beam concrete from early crack.

Based on the analysis of the present situation of experiment teaching for medical specialty,this paper points out that we should integrate the content of experiment teaching,change the teaching method,and carry out experiment teaching based on "three stages".

In the course of dynamic compaction reinforcement and treating floppy foundation,earth volume is compressed in the effective scope of getting force to any tamping point,which is controlled by three stages that is reducible porosity stage,granules deformation stage(granules compaction stages) and granules inlaid stage.

The experiment system is divided into three stages according to the site of control, and the method of fuzzy technology is used in building the model for evaluating the rationality of experiment system of sensory evaluation, and the application of the model is illustrated by an example.

Interpreting from the standpoint of emotional transference,this paper puts forward three stages in emotional teaching:the first stage,teachers implement the af.