Cleaner production is a kind of active environmental strategy.

Cleaner production has been disseminated worldwide quickly as a trend of environmental protection and realized as a turning point of environmental strategy from passive reaction to active action after it was raised in USA and some other developed countries at the end of 80′s.

The article explores the mechanism of environmental strategy s effects on firm s competitiveness from inherent angle of enterprises.

The environmental challenge of Great Western Region Development in China is the aggravation of ecological frangibility and the quickness of environmental pollution going in a westward direction.

On the basis of analyzing the concept of charge temperature in the field environment,this paper discusses the unbalances of internal temperature of charge and environment temperature and the serious extents of traditional charge temperature measure error.

To improve the real-time performance and fidelity of virtual battlefield environment simulation,three-dimensional terrain simu-lation requirement of battlefield environment is analyzed in the paper,and the reality of three-dimensional terrain on Creator is studied systematically.

Impact analysis of information security on the tactical environment;