A text watermarking algorithm that is based on statistical characteristics of inter-word characters' content and format (TWSCIWC) has certain robustness.

文本水印是一种有效的数字文本版权保护技术，鲁棒性和安全性是其研究的核心问题之一。

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This method has more strong robustness, suits the sample data in singular conditions and can keep a certain forecasting precision.

该方法具有较强的稳健性，适应异常情况下的样本数据，能保持较满意预测精度。

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Enter a certain period of a particular day, the return day of the week. The program has the fault tolerance and robustness.

说明：输入某年某月某日，返回这一天是星期几。程序具有容错性和健壮性。

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