| 长江上游水质与产业密度关系数学模型 |
| 摘要点击 1145 全文点击 1541 投稿时间：1999-05-02 |
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| 中文关键词 水质 产业密度 数学模型 长江上游 |
| 英文关键词 water quality,industry density,mathematical model,upper reaches of Yangtze River. |
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| 中文摘要 |
| 通过对长江上游（四川省）各地、市、州水质及相应地区产业密度的分析，以地区水质P'j 为自变量，以产业密度Ｇ′为因变量，以１＋ ５P'j 和ｌｎG′作散点图并进行数学拟合，得到四川省水质与产业密度数学模型．对数学模型求导并令导数等于１，得P'j＝ ０．４０２，Ｇ′＝ １４１．７１； 当Ｇ′≤１４１．７１万元／ｋｍ2 时，水质的变差速度小于产业增长速度，当Ｇ′＞ １４１．７１ 万元／ｋｍ2 时，水质的变差速度大于产业密度的增长速度． 在考虑四川省经济发展时要注意到这个关系． 在产业密度大于１４１．７１ 万元／ｋｍ2 时，为保护水环境和促进经济持续健康发展，必须提高产业的技术水平、调整产业结构、采取必要的环保政策、加大环保投入和环保新技术的开发和应用． |
| 英文摘要 |
| Through assessing the water quality of upper reaches of Yangtze River(Sichuan Province)and analyzing the industry density of Sichuan province,a relation of water quality and industry density was found and a math model was established.Deriving the equation and letting the derivation equal to 1,a very important point was gotten.When G′>141.71×104 Yuan/km2 the water quality will lower down quickly.For protecting the water quality and making economy sustained development at the upper reaches of Yangtze River (Sichuan Province),a series of enhanced measurements of progress of industry process,industry construction adjustment and relative policy for environment protection should be taken when industry density reaches 141.71×104 Yuan/km2. |
