Divides into two groups stochastically.
随机分为两组。
Watermarks are stochastically permuted and coded by LDPC to improve the robustness against attacks.
水印嵌入之前进行随机置换与LDPC编码增强了水印抗攻击能力。
Methods:The blood pressure of 89 clinic patients with essential hypertension was measured stochastically.
方法：对门诊就诊的89例原发性高血压患者随测血压。
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