Based on the analysis of the three female protagonists\' psyche via theories of signification,marginalized personality organization and feminism,this thesis elaborates on Morrison\'s contemplation and reconstruction of black women\'s spiritual world,with an attempt to explore the novel\'s expressive force and artistic appeal.

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.