diffusing object meaning in Chinese

扩散物体

The diffraction formula and statistical law of optical fields are used to get the cross - correlation function of intensities of laser speckles of the moved diffuse object
该方法利用光传播的菲涅尔衍射公式和光场的统计规律，给出散斑场光强在散射体位移前后的高斯光束相关函数的表达式。
Among hese method , one of the simplest is the deepest gradient descent algorithm , but it has one disadvantage that the solutions are oscillatory and slowly convergent . a friction term is ntroduced to avoid oscillatory solutions and raise convergence rate . the third major contribution of this dissertation is study on 3 - d diffuse object surface optical automatic measurement
其次，结合要处理的具体问题，介绍数值优化及几种常用的无约束最优化计算方法，以最优梯度法为基础，讨论其算法的优缺点，通过引进阻尼系数，改进了算法的收敛速度，从而提高迭代精度。