The results show that (1)the steadiness of 3-D random waves in time domain is better than their homogeneity in spatial domain; (2) Bayesian approach (BDM) is available for directional spectrum analysis from velocity data and wave surface data;

• 贝叶斯方法（BDM）适合于流速实验资料和阵列波浪资料的方向谱分析，给出的方向谱满足随机波浪的内禀性质（如光滑性、连续性等）；