The higher orders were retained as an infinite sum of standing eigen-waves to deal with the fields inside the grooves. 其中对槽区内的场处理，保留其高次项，表示为一无限本征驻波之和的形式。
In order to eliminate buffeting caused by exponentially reaching law, an idempotence term is introduced to make the control law smooth. 引入幂次项进行平滑设计，以减少指数趋近律引起的抖振。
