In this paper,we adopt stepwise multiple linear regression(SMLR) to select characteristic wavelength of textile fiber,and to research the concentration of the mixture of cotton and terylene.

Taking black rice,black millet,black bean,black mung bean,black buckwheat,black wheat,black peanuts,black corn,black sesame and black sweet potato as materials,the characteristic absorption wavelength and stability of 10 types of melanin from the materials were studied.

Age and growth characteristics of Cromileptes altivelis;

Response of super absorbent polymers under different water gradient on growth characteristics of Parthenocissus quinquefolia seedlings;

Effect of growth characteristics on fracture strength of free-standing diamond films;

Influence of simulated warming effect on growth characteristic of Carex alrofusca;

Age structure and growth characteristic of Castanopsis fargesii population;

The results show that the growth characteristics,population biomass and the pattern of biom.

From the similarity relations of radiative transfer theory,a parameter,namely characteristic length,was introduced on the basis of P_1 and P_3 satisfying approximatly the first-order similarity and third-order similarity relations.

Based on the researching of the infrared decoy countermeasure to the target characteristic length and energy equivalent centre,the countermeasure to the point target image radiation characteristics are analyzed.

By the relationship between the theoretical roughness and fractal parameters,the fractal parameters were introduced into the calculation of trait of a bearing center,and the influences of fractal dimension and characteristic length on the position of bearing center were investigated.