Indirect infringement of intellectual property has three forms:aiding infringement,secondary infringement and infringe-ment by subrogation.

Moreover,a base-wavelet based twice-weighted method was proposed to improve the accuracy of time-delay estimation.

The paper applies the secondth empower EIGamal encrypt method to validate the register code,and designs experiment to check it.

Compensation due to patent tort:An economic analysis;

An economic analysis of the stock-controllers′ tort;

Issues related to application of TRIPS patent tort rules;

Research on Civil Liability of Minors torts;

According to the related laws and regulations in China, the authors point out that the implementation of the system of borrower overdue penalty is a piracy behavior in the library, which has no legal gist and surpasses related stipulations.

Five difficult problems,such as piracy caused by using invalid patent and intellectual property protection under the network circumstances are analyzed.

The forms of its piracy are: loading others works stealthily; invading others Home -page; decoding obligees technique measures; pirating the headers rights; pirating the invention of the networks, etc.