The practical aspect is mainly to discuss pair work and group work.

An object-oriented testing strategy based on active object;

Using the Active Objects to Deal with Non-preemptive Multi-task in Symbian OS;

This paper discusses a special thought which uses the active objects to deal with non-preemptive multitasking and discusses problems about the platform security in Symbian OS that is the current popular operation system in the market of smart phone.

Then the method is applied to the GMS-5 data, and several cases of meso- β scale convective activity are checked to .

With NCEP s monthly re-analysis OLR data (1958~1998) and Chinese National Meteorological Center s rainfall data of 160 stations (1951~1998), the spatial-temporal distribution of the convective activity over South China Sea Area (SCSA) (0°N~20°N, 100°E~125°E) and the teleconnection between the convective activity and summer rainfall in Yangtze River Basin (YRB) have been analyzed.

The features of the periodical variation in the tropical convective activity, its horizontal structure and the 30—50 day oscillation were analyzed with the 1979—1984 outgoing longwave radiation (OLR) data, and the anomaly of winter convection in the El Nino year (1982) was discussed in detail.

The influence of position and horizontal scale of strong convective activities on the low frequency oscillation in the tropical atmosphere is discussed by using a simple three-dimensional numerical model of the tropical atmospheric motion including the wave CISK mechanism.

In this paper, impact of the convective activities over the western tropical Pacific warm pool on theintraseasonal variability of the East Asian summer monsoon is analysed by using the observed data in-cluding the daily OLR over the western tropical Pacific warm pool, daily 500 hPa height field and10-day precipitation in China.

In this paper, impacts of the thermal state in the western tropical Pacific warm pool and the convective activities over the warm pool on the summer climate anonialies in East Asia ate analysed by using the observed data of the sea temperatare in surface and subsurface of the westem tropical Pacific warm pool, the high cloud amount and precipitation for 1978-1989.

This thesis reports an empirical study on the effects of two task types on pair interaction in a genuine Chinese EFL class based on the theories of Input Hypothesis, Interaction Hypothesis and Output Hypothesis.