This paper firstly points out the importance of self-tracking angle measurement equipment in the UAV telemetry & telecontrol system, and describes briefly the principles of two angle measuring systems, one with phase interferometer, and the other with single pulse (amplitude comparison and phase comparison on a single plane).

Based on the theory of the multi-beam amplitude comparison DF of the new-style radar detector,the DF blind zone of multi-beam radar detector on inner site is analyzed in this paper.

The underground continuous wall was designed at inconsistent depth; this design program is very complex and led to very difficult construction.

0, the curve of the amplitude ratio γ and natural frequency is drawn following the parameter α and β change.

From three kinds of micro model for hydrate sediment we chose the amplitude ratio method for measuring the blanking degree to be used in modeling and analyzing the sediment with constant and variable gas hydrate concentration, respectively.

Based on the electromagnetic propagation resistivity logging(EPRL) response functions, studied is the relationship that phase shift ( Δ) and amplitude ratio (S) of EPRL vary with formation resistivity, source frequency and spacings between transmitter and receiver coils.

21-22 boilers as examples,analyzes the influence of the electical pulse supply method upon the amplitude ratio,duty ratio and angle of flow.

Through measuring phase shift and amplitude ratio,this technology eliminates the interference of direct coupling signal in traditional induction logging.