The convergence of formula, the determination of initial value to iteration and the calculation of critical depth of water has been discussed, and applied examples are listed is this paper.
对计算公式的收敛性、迭代初值的选取和临界水深的计算进行了讨论，并列举了应用实例。
By using the block of a original message as the chaotic map's initial value, the output of a chaotic system is obtained through its iteration to form original's message digest.
通过将原始明文信息块作为混沌映射的初始值，经过混沌系统的迭代得到系统的输出来构建原始明文的信息摘要。
This paper gives a method to calculate the arithmetic square root by iteration with given accuracy, analyses the iteration error and provides a selected range of initial value with the given accuracy.
本文给出了在预定精确度下用迭代法计算算术平方根的方法，并分析了迭代的误差，给出了预定精确度下初始值的一个选取范围。
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