The principal component analysis could substitu te a small number comprehensive variable for original multidimensional variable and obviously simplify data structure in the precondition of minimizing loss of original data information.

A dependable for earth-air missile weapon system designing already set data information analysts calculate way has been that realm inside very tough problem.

Security and encryption technique of information data;

The encryption algorithms of information data included public key encryp- tion algorithm,symmetry secret key encryption algorithm DES transforms changing data position algorithm of data encrypfion,and electronic signature of information data package.

A great deal of information data must be inputted in space grid structural calculation.

With the application of information diffusion principle of fuzzy information optimization processing method,based on the 60 sets of collapsing loess data from test,the fuzzy relationship between the coefficient of collapsibility and the pore-solid ratio,moisture content which is selected from important influence factors is built.

The relation between structural stability of unsymmetrically loaded tunnel and original data is established with the help of the information optimization theory,and the tunnel stability is evaluated with these data.

In order to change such a situation, must transform theconception, strengthen the information consciousness takingthe computer and the network as the carrier and the media, anddo well the work of the information optimization for the purpose of meeting the needs of the teaching and scientific researchofthe university.