Using the method of mean open durations of consecutive groups,the patch clamp recording of K~+ channel of PC-12 cell was analysed,Three open states of the channel activities were detected,the frequency distribution of mean open durations was fitted with normal densities of probability,and the mean and variance of each states were estimated.

A model grazing on summer-autumn meadow (from 1 June to 30 October)was originated to provide a practical method for estimating the effects of grazing frequency, grazing duration and grazing pressure on GMAME1.

Study　on　duration　of　comfortable　temperature　in　forest　tourist　areas　in　subtropical　zone;

All of the red tide incidents in South China Sea since 1980 ~2004,the spatial and temporal distribution of the events,and the change characteristics of the average duration of the red tides were analyzed.

The temperature of the reactor was lowered from 55℃ to 20℃ in case of heating failure and the duration in the low temperature were 1,5,12 and 24h respectively.

The statistical relationship between the occurrence frequency and the duration time of sand-dust storms in China;

The way calculating the duration time of inductor current in every work cycle was respectively given,when power switches were turned off in Boost a.

The sand-dust storm data compiled by the China State Meteorological Bureau for the period of 1960 to 2000 are analyzed to find the distribution of the sand-dust storm occurrence frequency against the duration time.