According to the properties of model in grey forecasting theory,bi-auto-seeking-weight method was proposed and applied to forecast the economic sequences which rise and fall by a wide margin.

The system of automatic addressing and control of televiewing in CATV integrates with the theories about communication, software, automatization cortrol, etc, in order to automatically search for CATV terminal addressing and controlling the audience state.

Because the Golden-section solution needed positive solution region, a self-seeking process was proposed to ensure the correctness of the program based on the converging properties of the surface curve, and man-made errors were so minimized.

According to the parameters of the system operation are constantly changing, on the basis of existing filter design, using the capacity of capacitor as variable, considering synthetically install capacity, reactive compensation and filtering effect, utilizing automatic optimization function of genetic algorithm, the optimal sets of filters was defined.