Due to difficulties caused by the absence of completed order in Rn, most of the research was the onedirection theory of stopping point or problem related to stopping surface.

The stopping theorems for two parameter Martingales (Supermartingales) at the stopping points are studied, with the stopping theorem and the predicatable stopping theorem of Martingales (Supermartingales) obtained.

There are six kinds of stopping points defined by Chen peide, Bakry, Merzbach.

The methods of expanding the programmable controller I/O points;

Using PLC, we frequently find that the I/O points is more than that provided by PLC itself.

To change the situations, such as the insufficiency of the function block, the lag of the CPU and the low speed, combined with the technical process of the furnace and the technical requests to test and control, ESC-100 control system developed by Zhejiang University Central Control Company is used to sample the control system I/O points as well as to scheme.

By the analysis of the source code of Linux s file system, not only the layout of the hard disk in the EXT2 file system but also the data structures related to EXT2 file system such as supper block, group descriptors, inode and directory structure detailed are described.