The vector analysis of the drive rate of a universal coupling;

In order to study the structure of face contacted blocks,the movability of three kinds of the face contacted block has been studied by vector analysis ,the scope of key blocks is dwindled, and the base for further study of the structure face contacted blocks has been established.

The design was carried out using vector analysis method,and the ideal outline curve equation was obtained.

Based on the engineering geology survey of the area with critical sliding rock blocks in the south open pit slope at a lead-zinc mine,the stability analysis on the sliding blocks is carried out by the 3-dimensional wedge vector analysis method.

The easy-solved mathematical model of the broken-rotor-bars squirrel-cage induction motor is established with synthetic vector for the question.

With the modeling of the synthetic vector,a transient mathematical model of the asymmetrical system on the triac off-state is established.

Owing to the multi-broken-bars rotor\'s winding asymmetry,an easy-solved mathematical model was established with the extended synthetic vector for multi-broken-rotor-bars squirrel-cage induction motors.

Therefore,the vector analysis approach was presented to determine the flexural-torsional moments of lateral buckling beams more efficiently under various load types and support conditions.