| 日晷投影原理及其应用 |
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| 引用本文： | 刘群.日晷投影原理及其应用[J].贵州师范大学学报(自然科学版),2003,21(3):109-112. |
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| 作者姓名： | 刘群 |
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| 作者单位： | 贵州师范大学,数学与计算机科学系,贵州,贵阳,550001 |
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| 摘 要： | 应用日晷投影原理 ,可推导出日晷上确定投影点直角坐标的一般公式 ,以及 5类有代表性的日晷的时线方程。它们的时线皆为直线。其中 3类为常见的日晷 ,其余 2类日晷新类型。文中的实例说明新型日晷的安装 ,并提出附加观测 2 4节气的装置。
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| 关 键 词： | 日晷 日晷投影 节气 |
| 文章编号： | 1004-5570(2003)03-0109-04 |
| 修稿时间： | 2003年4月10日 |
The theory of gnomonic projection and its application |
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| LIU Qun.The theory of gnomonic projection and its application[J].Journal of Guizhou Normal University(Natural Sciences),2003,21(3):109-112. |
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| Authors: | LIU Qun |
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| Abstract: | With the application of the theory of gnomonic projection, the general equation of the right angle coordinate on the exact point of gnomonic projection and five kinds of typical equations of denoting prjective lines of the gnomonic projecti on can be deduced. Their projective lines for denoting time are straight. Three of them are usual gnomons and two of them are new types of gnomons. Examples for installing new types of gnomons with the observing devices of the twenty-four divisions of the solar terms are given in the article. |
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| Keywords: | gnomon gnomonic projection solar terms |
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