例句與用法

1. 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
   該方法利用光傳播的菲涅爾衍射公式和光場的統(tǒng)計規(guī)律，給出散斑場光強在散射體位移前后的高斯光束相關(guān)函數(shù)的表達式。
2. 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，結(jié)合要處理的具體問題，介紹數(shù)值優(yōu)化及幾種常用的無約束最優(yōu)化計算方法，以最優(yōu)梯度法為基礎(chǔ)，討論其算法的優(yōu)缺點，通過引進阻尼系數(shù)，改進了算法的收斂速度，從而提高迭代精度。