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.

Self-similarity research of complex networks based on information dimension;

Applied Research on Landscape Fractal Dimensions Characteristics on Information Dimension;

From the point of view of engineering application, it introduces the algorithm of box dimension and information dimension for discrete time series and reveals the inherence relation between the fractal dimension and signal complexity by calculating the fractal dimensions of three simulating signals.

Due to the complexity of both bioinformation data and their applications, there is no relatively common framework model so far to meet the development need of general bioinformation secondary database systems.