The author gaves a computer simulation comparison of some surrogate weights under ranked information of attribute weights.

To attempt to analyze the legal significance of the agency right setting, the kinds of agent-executing the right of informed consent in medical practice as well as the problems and strategies under various conditions.

The concepts of unauthorized agency and unauthorized agency contract are reviewed,and the validity of unauthorized agency contract stipulated in the clause 48 of the Contract Law of PRC is probed.

During the process of practicing civil laws , some civil law behaviors can only form unauthorized agency, for the lack of procuration, although they can be called attorneyship, for the possession of the superficial features of attorneyship.

If the relative party was in good faith and innocent when contracting,he may claim the contract to be valid under apparent a-gency and the lender is liable,or choose unauthorized agency and the lender and borrower are related liable for the damages to his reliance interest.

Analysis are made on the proxy authorization schemes and proxy signature schemes in electronic business,as to the security threats of present proxy signature schemes,this paper presents a hybrid proxy signature scheme based on hyper-elliptic curves cryptosystem that can gain a wide application in computer and wireless communication network.

Role-based delegation audit model;

Because Role-Based Delegation is an important part of Access Control Mode, and becomes a main Access Control mechanism in Distribution Computation, the stud.