The wetting front moved nearly parallel to the soil surface, and its length could be described by a power function of time, when the distribution of initial soil water was uniform. 当初始含水量分布均匀时，降雨入渗过程中湿润锋面几乎平行坡面运移，湿润锋深度与时间的关系可用幂函数描述。
With respect to the existence of asymptotically repetitive initial condition, the sufficient conditions are given, which guarantee the convergence of the learning control. 对于初始状态函数渐近重复的情形，给出了这类系统的极限轨迹和迭代输出收敛于该极限轨迹的较弱的充分条件。
