Contraction principle is an important constitution of large deviation theory. 收缩原理是大偏差理论的重要组成部分。
By traditional method of large deviations, we obtain the logarithmic asymptotic for the probabilities and large deviation principle for the corresponding measures. 利用经典大偏差的方法，在一定的条件下，得到了相应概率的对数渐近式及测度族的大偏差原理。
