Generally, model can be expressed by classification rule, decision tree and mathematical formula.

通常，模型可以用分类规则、判定树或数学公式表示。

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This paper puts forward there is not a certain rule of the layout of mathematical formula in science and technology periodical after investigating the 32 periodicals of science and technology.

对32种科技期刊进行了考察，发现目前科技期刊中数理公式的编排无一定的规则，为使科技期刊中数理公式的编排进一步规范化，针对共同存在的几个问题，提出了规范化的见解。

youdao

This paper puts forward there is not a certain rule of the layout of mathematical formula in science and technology periodical after investigating the 32 periodicals of science and technology.

对32种科技期刊进行了考察，发现目前科技期刊中数理公式的编排无一定的规则，为使科技期刊中数理公式的编排进一步规范化，针对共同存在的几个问题，提出了规范化的见解。

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