提出用球形蜗杆砂轮连续分度展成磨削内齿轮的概念，阐述了其磨齿原理。

A method for grinding internal gear using spherical worm emery-wheel is presented.

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介绍了在数据库知识发现(KDD)中将连续属性离散化的一些方法，并提出使用值差分度量离散化的算法。

Some methods for dividing continuous attributes in KDD (knowledge discovery in database) and a method based on VDM (value difference metric) are presented.

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分度廓形的导数连续。

Derived number of indexing profile is continuous.

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