To avoid the influence to the experimental result by the reflection of the water in the ship model pond;and the reduction of the efficiency in the laboratory by the course of waiting for water,a wave absorbing net cage is designed and tested.

In this paper,according to the data acquired from both current flume and wave flume experiments,the current slowing and wave absorbing characters of artificial seaweeds are thoroughly analysed.

The wave absorbing structures have been widely applied in many countries.

In the model test on the upstream navigable flow condition for daily regulation of the Three Gorges project,lock gate control of the power plant,real time collection of the model water level and discharge control and wave absorption of the model inlet is programmed on the basis of the developed software Labview.

A study on the estimation of the attenuation of the maze-model muffling cover connected by severalsmall anechoic chambers has been done, and the way to figure out the amount of attenuation and the method toverify the result are given.

The analysis of free sound field in the anechoic room;

Design of an anechoic room under the conditions of forced ventilation;

To perform an inspection test of free field in anechoic room, some questions that are the test signal, the directivity of sound source, and the sound center calibrating of sound source must be paid attention to.