凹壁 meaning in Chinese

recess

The positive wall ' s waves system can be viewed as a combination of the effect of forward - step forcing and backward - step forcing , and these two waves systems respectively radiate upstream and downstream without mutual interaction . for a negative wall , however , the result is opposite to the positive wall , and for a combined wall , it can be considered as the combination of a positive forcing and a negative one
我们得出结论：上凸壁面上的波形可以看成是向前凸台阶和向后凸台阶分别向前后散射发展的结果，二者不相互作用；下凹壁面的波形却是向前凹台阶和向后凹台阶相互作用的结果；组合式壁面的波形是上凸和下凹相互作用的结果。