E-print archive is the platform of network database where the papers have been collected by author s self-archiving.

"e-print archive" is an informal scholarly communication system,which is advocated by the Open Access Movement.

In the paper, the readability of Chinese character printed text is discussed, the readability is considered to be a engineering - technological property which is essential to easy reading , and the text is considered as a multi-layer system.

New semi-fragile text watermarking algorithm based on one-dimensional normal cloud model;

Based on feature coding idea,this paper puts forward a new algorithm of fragile text watermarking based on changing the underlining feature of character.

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

The algorithm splits the original medical image to some blocks to do integral wavelet transform,chooses four low-frequency coefficients and four high-frequency coefficients in every block,and chooses the least significant bits,then dose the XOR operations with the corresponding bit of text watermark.

A text watermark algorithm based on the tone of Chinese characters is proposed.