Beginning with the economic law of the diffusion of high technology, the paper analyses the affecting factors of critical scale of the diffusion of high technology into textile industry and studies the diffusion of micro\|electronics in Changchun textile mill by Chow test.

The paper analyses the influence of macro economic policy,market demand,investment,qualified personnel resources and the support of other industries in the development and the formation of critical scale of chinese electronics industry.

By applying the real options approach,the firms′ optimal hire critical scale to professional manager is obtained.

Analysis and comparison for inductor loss of the critical conduction mode boost PFC circuit;

A general method is proposed for stability analysis of nonlinear systems in critical cases for the purpose of revealing the inherent relationship between the critical mode (near critical mode) between the oscillation、bifurcation or loss of stability of engineering mechanical systems.

Since there have existed several models to describe the characteristics of HTS,such as perfect diamagnetic model、flux flow-creep model and critical state model, each has its advantages and disadvantages.

Three kinds of critical state models, such as Bean's model, Kim's model and Power model, are selected to analyze numerically the initial magnetic curve and hysteresis loop of Bi2223 high-T c superconductor, as an example, with a simple method.