Because of the limitation of the model making and the existing wind tunnel\'s size,it is difficult to keep the line and tower in the same scaling factor in developing the aeroelastic model of the power transmission lines system,and a distorted scaling factor is needed in span length of the lines.

An approach to measure the scaling factor of matched filter by using rectangle aperture s Fourier frequency spectrum;

In order to make the constraint algorithm more efficient,the processing of constraint propagation is analysed,and parameterized description of the arc consistency propagation depth is represented by using variable domain retraction proportion.