Influences of ground water level changes to thin sand level of soft foundation;

Influence of cut-off wall in Changjiang dike on ground water level at its inside aera;

Study on the short-term earthquake prediction method with the data of ground water level;

A food drying equipment QTM with the function of air conditioning is introduced and a serial intelligent system of measurement and control based on superordinate computer and subordinate computer is studied.

The system is a two-level control module in which the industrial control computer is used as main computer and PLC as subordinate computer.

The article also describes field bus control system of its subordinate computer and control software of its principal computer.

Horizontal displacements in infinite slopes of cohesive soil due to raise of groundwater table;

Monitoring and Analysis on the relation between variation of Groundwater table and land Subsidence in urban area;

A simple method to calculate aquifer parameters through groundwater table and soil water content data;

One is the upper computer and the other is the lower computer.

According to the application environment of spaceborne electronic equipments,in a view of high reliability,the design principle and realization method of lower computer are discussed in this paper.

Design of lower computer system has been finished for the electronic system of space CCD cameras based on requests.