It is proposed that only when the monitoring datum of ground displacement is properly selected and monitoring scheme,monitoring stations arrangement and monitoring period are optimized.

This paper analyses some problems of deformation monitoring, example of the monitoring datum, monitoring method and precision, deformation analysis and prediction, etc.

Adopting rank shortage free net adjustment and stable assessment analysis,the stability of the modification monitor base net for one landslide is analysed.

When analyzing the monitoring data of Shanghai Zhadian Gas Turbine Power Plant,we found it hard to define the monitoring standardsline of thermal parameters as the atmospheric temperature and power load varied during the whole year.

When analyzing the monitoring data of Shanghai Zhadian Gas Turbine Power Plant,it is hard to define the monitoring standardsline of thermal parameters as the atmospheric temperature and power load vary during the whole year.

As a method of forest volume measurement, 3P sampling technology has been accepted in forestry field, but for the reason that two critical problems, precise monitoring of stand volume and fast generation of random data can t be solved well in traditional forestry resources monitoring, the technology has not been used widely for a long time.