锥面的斜等距曲面及其性质

本文详细介绍了斜等距离面的概念并证明了锥面的斜等距曲面的一些性质，同时，也对斜等距曲面上一点邻近的形状进行了分析。     

一种基于边缘点特征的细化算法

本文根据二值图像的边缘点在8个方向上具有较多的像素不相互对称这一重要特征,提出了一种新的细化算法.由剥蚀与矫正两部分组成.在剥蚀部分,只需判别被测像点的8个或12个邻点的分布情况,就可以决定该点删除与否.矫正部分则是对剥蚀后的图像的进一步完善.本文所介绍的算法具有判别简单、对噪声不敏感、并能很好地保持原模式的形状及连通性的优点.     

分析纯甲醇的新工艺

介绍了一种生产分析纯甲醇的新工艺,即在甲醇精馏塔的塔釜中加入适量的高锰酸钾和浓硫酸处理工业甲醇,它能与影响甲醇质重的低沸点杂质反应生成高沸点杂质(相对于甲醇的沸点),精馏后杂质残留在塔釜中,确保馏出甲醇质量符合分析纯标准。与化学试剂生产厂家通常采用的用盐酸羟胺、氢氧化钠分别改善甲醇中“醛与酮”和“游离酸”技术指标相比,新工艺设备投资少,节能降耗,生产效率高,经济效益好。     

A new method for designing a developable surface utilizing the surface pencil through a given curve

This paper proposes a new method for designing a developable surface by constructing a surface pencil passing through a given curve, which is quite in accord with the practice in industry design and manufacture. By utilizing the Frenet trihedron frame, we derive the necessary and sufficient conditions to construct a developable surface through a given curve. Considering the requirements in shoemaking and garment-manufacture industries, we also study the special case of specifying the given curve as a geodesic. The given geodesic can be classified into three types corresponding to each type of developable surface. We also present the polynomial representation of the developable surface. The algorithm is convenient and efficient for applications in engineering.     

空间曲线的从切线构成的可展曲面

给出曲线的从切面上的直线——从切线构成的直纹面是可展曲面的充要条件．并根据曲线曲率、挠率的性质,得到几个结论．