深海热液温度场测量重建算法比较

Comparison of the Reconstruction Algorithms for Temperature Field Measurement of Deep-Sea Hydrothermal Vents

介绍利用声学方法测量深海热液温度场的基本原理。对宽单峰、窄单峰和双峰温度场模型,采用最小二乘法和傅立叶正则化方法分别进行重建仿真,给出重建温度场的绝对误差、相对误差和均方根误差。比较最小二乘法与正则化方法对几种温度场模型的重建结果。仿真结果表明:最小二乘法对宽单峰模型温度场具有较高的重建精度,而正则化方法对高温区相对测量域偏小的窄单峰模型及双峰模型温度场比最小二乘法有更好的还原结果。

The basic theory of image restoration method for acoustic temperature field measurement of deep-sea hydrothermal vents is introduced.The reconstructions of temperature fields via the least square method and the fourier regularization method are presented for wide and narrow single-peak models as well as for double-peak model of temperature distributions.The absolute,the relative and the root mean square errors of the reconstructed temperature fields are given.It shows that the least square method applied to wide single-peak temperature model has a good restoration accuracy.But the Fourier regularization method has better results than the least square method for double-peak and narrow single-peak temperature field models.