| 摘 要： | The theory of the smooth-average field in shallow water is presented;the smooth-average expres-sion suitable for long ranges and the image-source expression suitable for short ranges are combinedtogether to give a more complete calculating method of the average field.The correspondingcomputer programs,which make the calculation of the average field easy and rapid,have heendeveloped.Some examples of application of the method are given,and the calculated results arequite consistent with the experiments.
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