超音波法液位元元元元元元测定
ultra-sonic method of liquid meaduremert
渤海海冰
temperature in the Bohai sea
sea ice
ICE
sea ice in the Bohai Sea
Bohai Sea ice
中国科学院南海海海洋研究所
South China Sea Institute of Oceanology
academia sinica
三元伪随机序列
ternary pseudo-random sequences
ternary pseudo-random sequence
图像均匀性伪像
image uniformity pseudomorphism
伪像成因
Mechanism analysis of the artifact
下侧壁伪像
artifact of infero-lateral wall