Moreover,extremal graphs with these bounds are characterized,respec- tively,and the upper bound on the spread of the graphs is presented.

In order to improve the ability of antiship terminal guidance radar to counter the chaff jamming,through the analysis of the chaff spectral,the paper presents an effective target recognition method which is based on the chaff spectral expansion effect.

For spatial discretization,the compact finite difference schemes on non-uniform meshes in x and y direction are adopted with Fourier spectral expansion for numerical approximation in z direction,the spanwise direction.

By constructing a quasi birth-and-death process and applying the spectral expansion method the algorithm of stable indexes are given,especially the explicit expression of stationary distribution when c=2.

Dependence of spectrum broadening on inner diameter of capillary restricting the filamentation in high pressure gas;

Several techniques of femtosecond pulse spectrum broadening in the chirped pulse amplifier of femtosecond laser are reported, and a few spectrum broadening elements are used.