This paper has analyzed the working principle and basic types of E-preprint archive,reviewed the most famous disciplinary E-preprint archives: arXiv.

This article describes the development of preprint,introduces several important preprint systems in the world,analyses the importance of preprint resource,and then discusses the problem of resource sharing.

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.