最后，放置组到对象存储设备的映射是一个伪随机映射，使用一个叫做Controlled Replication Under Scalable Hashing (CRUSH)的算法。
Finally, the mapping of the placement group to object storage devices is a pseudo-random mapping using an algorithm called Controlled Replication Under Scalable Hashing (CRUSH).
该算法利用线性同余模型产生伪随机序列以对图像进行空间置乱，采用异或操作实现图像的灰度变换。
It achieves space chaos of an image with a pseudo-random sequence generated by linear congruential method, and achieves gray chaos by XOR operation.
设计了实验平台的通信系统及算法过程中产生密钥的伪随机序列发生器。
The authors designed the communication system of the teaching platform and the pseudo random number generator to generate secret keys of the algorithm.
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