This paper analyzed the lowest outlet oil temperature of station of the hot oil pipeline,the heat-transfer property and the flowing property at the work of normal operation,shutdown and restart again were comprehensively considered,the predicator-corrector method and the finite element method were applied to solve the mathematical model in this paper,and the software of simulation was developed.

Brief Discuss on the conceptual model forecasting tool of the Maximum and minimum temperatures Sudden change

The main results are: 1) most of the temperature trends are positive,the warming rate of minimum temperature is higher than that of maximum temperature,the warming rate is high in winter than in summer,t.

The date of monthly mean maximum and minimum temperature are obtained in 74 stations in Northeast China,after minimizing the posssible effect of urban heat island from 1959-2002.

Moreover,the minimum temperature at night is important for crop respiration,dry material accumul.

Minimum temperatures are generally increasing throughout China.

With fixed position observation for about 5years,the weather factor data such as relative humidity,average air temperature,maximum air temperature,minimum air temperature,average maximum air temperature and average minimum air temperature inside rubber plantation ecosystem were analyzed against the data outside the system.

Meixian ground lowest temperature higher has the frost analysis in recent years;