This paper sets up an unascertained measuring model . Comparing with other models , this model is more rigorous , the conclusion is more reasonable and practicable.

本文给出大气环境质量评价的未确测度模型。与其它评价模型比较，本模型更加严谨，使评价结果合理、实用。

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With the more and more fierce global competitive and the rapid changes of consumers' demands, the traditional management models are facing more and more rigorous challenges.

随着全球性竞争的日益激烈和用户需求的快速变化，传统的管理模式正面临着严峻的挑战。

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