Formulae for calculating the mean temperature difference of rubber to cooling medium in reclaimator and heat transfer coefficient of system have been derived from theory.

This paper, according to heat transfer basic equation, deduces overall heat transfer coefficients in the transmit heating tube of the pure counterflow arrangement, axial temperature profile of the fluid along the length of transmit heating tube, simulates logarithmic mean temperature difference in a double tube and the effective overall heat transfer coefficient, wi.

The logarithmic mean temperature difference and the integral mean temperature difference are analyzed in the optimum design of heat exchanger,the proposed approximate equations of logarithmic mean temperature difference in the literatures are discussed.

As an index denoting vegetation cover, NDVI is influenced by many climatic factors such as precipitation and average air temperature.

This paper analysed characteristics in the variation of mean temperature,the minimum temperature as well as the maximum temperature in the Yangtze River Valley over the period between 1951 and 2000.

Based on the data of mean temperature,daily minimum temperature and daily maximum temperature in Southwest China from 1951 to 2000,characteristics of temperature variations are analyzed.

Through the statistic analysis on the heavy fog day number and relative mean temperature and humidity from 1985 to 2004,the article gave the contribution of the local landform and special weather situation to the formation of heavy fog in Wenquan.