The method to test the variations of the wavelength of electrons using Kikuchi maps when the accelerating voltage is changed in the HEED experiment is put forward.

In high power electron beam bombarding furnace (EBBF),when 6-phase 12-puslse full wave rectifier and open-loop control strategy are adopted for accelerating power supply,the melting power can be stabilized by oppositely regulating the beam current to adapt the variation of accelerating voltage.

The patterns of the RF acceleration voltage,frequency and phase are the main factors to determine the longitudinal motion of beam and the beam loss level.

Application of piezoelectric accelerometers in water pipeline leak locating;

Introduced the characteristics of the piezoelectric accelerometer such as small volume,low-weight,wide measure range.

The theory and application of vibration measurement by using piezoelectric accelerometer,charge amplifier and dynamic signal analyzerare introduced.

Research on transverse sensitivity of the piezoelectric accelerometers;

Design of resonant type vector hydrophone based on piezoelectric accelerometer;

The transverse sensitivity of piezoelectric accelerometers was studyed for a long time, a great deal of the calibrated datas were analysed and contransted.