Given the blurry definition of the exiting copyright law, conflict of copyright doctrines, perplexity of copyright custom, etc.

And finally the writer proposed some copyright management countermeasures to the P2P file sharing techniques.

This paper expounds the principles, features and particularity of the copyright management in digital library, and introduces the application and protection of digital copyright management.

This paper points out that under the network environment the construction of the digital library is closely linked with the copyright protection,which include the digitalized transformation of the resources,the right of the network transmission,the technical privacy protection,and the copyright management information,etc.

Meanwhile it goes further into the problem by discussing construction of librarian team,control over readers,management of copyright,protection in techniques,and finally the countermeasures are given.

At the same time, China copyright agent market, along with the development of the copyright trade, also began to develop and are playing an increasingly important role in the process of the economic development of the publishing industry.

Taking account of the effect of wellbore storage and the influence of non-Darcy effect,the relationship between dimensionless time and dimensionless pressure has been derived and theoretical plate of gas and water two-phase flow has been mapped out which provides a theoretical basement for well test int.

A theoretical plate of reasonable ratio of space between wells and rows in different well patterns were studied, and different anisotropy degree formations of low permeability reservoirs we.