In addition,the author explores SME\'s networking survival mechanism under the Long Tail Theory based on the main target of the theory-the small-and medium-sized enterprises as well as their application of the Internet.

Generalized predictive control based on viability theory;

Based on the viability theory, necessary conditions for the existence of the optimal viable control of the control systems with state constraints are presented.

Viability theory is a mathematics method of researching evolvement of uncertainty system under vary bounds conditions.

A viability theorem for the partial differential inclusions is proved and a topological property of the viability solution set for the partial differential inclusions is given.

In this paper, We consider the existence of viable trajectories for differential inclusions withunbounded right-hand sides, a corresponding viability theorem is proved.

This paper,by presenting human subsistence,experiencing individual subsistence mentality and reflecting on life value,attempts to disclose the ways that Chinese classical poems mirror human subsistence and human life.