The weather model (SNWM) was established by employing the combination of vertical cross selections and cycle extension prediction .

To study synoptic patterns and pollutant transports in regional air environmental processes in North China,a pollution process from October 2nd to 12th,2003 was discussed as an example.

An analysis was made of the circulation background and influencing weather systems of 94 short-range heavy rainfall events from 1994 to 2001 in the northern and central Fujian Province,and the synoptic patterns were divided into three types: cold shear (or trough), southwest flow and Subtropical High.

Based on daily surface charts of East Asia at 08 o’clock during 1980—1997, four synoptic types of fog in the Taiwan Strait (20°—27°N, 115°—125°E) are summed up and analyzed.

To solve the problem,a new method based on the antenna model is proposed in this paper.

As a practical application, this new method is used to modify the LF antenna model, calculate the current distribution and the input impedance of the antenna.

In this paper, in order to make a qualitative analysis of the secure situation of the optical fiber link, the radiant power of curving optical fiber is derived theoretically based on an antenna model, a simulation analysis for the relationship between curvature radii and area of detector changing with the power of the curvature radiation is also made, and finally the analytical result is given.

The evolution of synoptic types of serious contamination,the structure of vertical stratification of temperature and humidity,and the character of regional atmospheric contamination in the heating period of 2000 to 2001 were analyzed.