The fluctuating velocity is then decomposed into multi scal eddy structures by means of wavelet transform.

It combines the merit of key tree and Pairings-based key exchange, and involves members long-term keys and session random in the group key to avoid dependence on signature or MAC.

The turbulence structure control by adding component parts similar to the large eddy break up device and riblets in the hydrocyclone was investigated by studying the characteristics of the turbulent pressure field,and the relationship between turbulence structure variation and energy consumption reduction was also studied.

These results show that turbulence structure generated by tumble has the characteristics of larger scale and lower frequency, and therefore autocorrelation coefficient and intergal time scale of turbulence are considerably increased when tumble breaks up at the end of compression.

As a cure of this shortcoming, it is suggested that the traditional ASM could be corrected to be a K-E LAASM, in which the boundary conditions of turbulence structure can be specified independent of the mean velocity profile and turbulence intens.

Experimental study on turbulent structure of flow over sand ripples in open channel;

Due to the extreme complexity of turbulent structure, there is no way to solve the problem theoretically.