perturbance英'pɜːtɜːbəns美'pɜːtɜːbənsCOCA²⁸⁰¹³⁶⁺⁵ 基本例句 n.扰动⁵⁰干扰;摄动⁵⁰ The address of pixels to be scrambled is selected by pseudo random number sequence generated by a class of perturbance-based piecewise linear chaotic map PB- PLCM. 提出了基于一族混沌映射的图像置乱算法，通过一族加扰分段线性混沌映射 PB- PLCM产生伪随机序列。 dictall