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如何正视数形结合法 被引量:1
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作者 裘科峰 《绍兴文理学院学报》 2008年第10期38-40,共3页
匈牙利著名数学家G.Polya曾经说过:数学教学就是解题教学,数学解题就是由条件指向结论的一系列思维过程.—些数学问题,单方面从条件或从结论去着手,往往不是头绪繁多就是运算冗繁,若能从一些算式的结构特点考虑,找出题目中蕴含的几何图... 匈牙利著名数学家G.Polya曾经说过:数学教学就是解题教学,数学解题就是由条件指向结论的一系列思维过程.—些数学问题,单方面从条件或从结论去着手,往往不是头绪繁多就是运算冗繁,若能从一些算式的结构特点考虑,找出题目中蕴含的几何图形,数形结合,常常能取得事半功倍的效果.然而,正是因为我们过于"迷信"数形结合法,而使我们许多人陷入了对数形结合法认识的种种误区. 展开更多
关键词 数学结合法 数学解题 灵魂 探究
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The Design of Water-reusing Network with a Hybrid Structure Through Mathematical Programming 被引量:4
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作者 刘永忠 段海涛 冯霄 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第1期1-10,共10页
A new design method for a water-reusing network, with a hybrid structure, to reduce the complexity of the network and to minimize freshwater consumption, is proposed. The unique feature of the methodology proposed .i... A new design method for a water-reusing network, with a hybrid structure, to reduce the complexity of the network and to minimize freshwater consumption, is proposed. The unique feature of the methodology proposed .in this article is to control the complexity of the water network by regulation of the control number in a water-reusing system. It combines the advantages of a conventional water-reusing network and a water-reusing net work with internal water mains. To illustrate the proposed method, a single contaminant system and a multiple contaminant system serve as examples of the problems. 展开更多
关键词 water-reusing network internal water main hybrid structure OPTIMIZATION
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