Reservoir flood season staging calculation is conducted based on annual maximum sampling and super-quantitative sampling through using vector statistics and relative frequency methods,and compared with other methods currently in use.

Experiment research of visual performance feedback of different relative frequency to motor skill learning;

according to the first statement that a relative frequency is a probability; according to the second statement that relative frequency and probability are two distinct concepts; probability is dependent on the observers, while relative frequency is not dependent on the observers.

It is found that there is a good linear relation between the logarithm of 6 base mode number and its relative frequency (RF); most 4 base modes and 3 base modes are in the region of RF<2 .

Anomalous discrimination of relative phase spectrum in the complex wave signal;

The mechatronics hydrausic service system is a typical mechatronics system , and the logarithmic frequency method is the chief design method with which the stability of the system can be obtained, the range of the stability as well as the frequency width can be calculated, the dynamic design can be made.