Therefore, probing into its origin and evolution will be helpful in revealing the general inherent laws of the creation and evolution of folklores and understanding the close relationship between artistic creations of men of letters and folk arts.

The thesis describes and analyses the present situation and the formation mechanism of learning-origin structure of China and Europe,and suggests we must draw on the experience of learning-origin structure construction in Europe and America and make the reform in.

In order to improve the detection ability of fuzzy image edge and robust to noise,this paper proposed a novel edge detection method based on the fuzzy entropy and the characters of image edge structure.

The transitional response voltage distribution of transformer winding under lightning surge is simulated by PSpice,the impulse response voltage distribution of transformer winding for two design scheme is analyzed,and the rationality of partitioning insulation structure in transformer winding is validated.

The article introduces the insulation structure of low-voltage asynchronous motor, dealing with how to select its disposition in the light of the motor s using situation in the repair of asynchronous motor.

Finite element analysis of bird impact damage to representative beam-edge structure;

According to the structural shape and functional requirement of a beam-edge structure,we propose two kinds of tilted-plate shield beam-edge structure on the basis of conventional beam-edge structures.

Because of the unreasonable design on insulation construction,the non-segregated buses of Third Qinshan Nuclear Power Plant suffer many faults,which cause the startup & backup transformer and the unit service transformer tripping frequently.