On average the region experienced an accelerationof growth to 2.7 percent from 2.1 percent in 1999, and per capita incomes stabilized following two years of decline.
该地区的平均增速从1999年的2.1%提高至2.7%,人均收入也在连续两年下降之后趋向稳定。
2
So, variable structure control theory is used in Angle stabilization of roll, and model - following variable structure control theory is used in acceleration stabilization of pitch and yaw.