data stream replacement 数据流替换
The experimental results show that the algorithm is reasonable and sensitive to several operations such as lossy compression,data replacement.
实验结果表明算法对有损压缩、数据替换等各种篡改操作具有较强的敏感性。
参考来源 - 一种基于图像内容的易损水印算法·2,447,543篇论文数据，部分数据来源于NoteExpress
The iterative algorithms in C language were given, which used direct data replacement to reduce the dimension of matrix and saved the storage space.
在迭代算法中，采用直接数据置换降低矩阵维数，节省了存储空间，提高了运算速度。
Refresh table: In some data warehouses, the entire table is dropped once per year and a replacement table is loaded with all the data except for the data that is no longer needed.
刷新表：在某些数据仓库中，整个表每年删除一次，然后装载一个替代的表，这个新表包含了除不再需要的数据以外的所有数据。
Replacement operators ensure that malicious scripts can't append SQL into queries to override the existing code and get access to data that they shouldn't see.
替换操作符确保恶意脚本不能将SQL附加到查询中覆盖现有代码，访问它们不应该看到的数据。
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