| TheEstimationofStemTaperCurvefromtheRadialInformationatThreeLocationsontheStem |
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| 作者单位： | Zheng Xiaoxian Liu Donglan College of Forest Resources and Environment，Beijing Forestry University，Beijing 100083，P.R.China |
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| 摘 要： | 该文探讨了不用编制削度表直接建立高精度立木干曲线的方法．当采用干曲线是３次多项式时，通常根据１０分法测定树干各部位直径，用最小二乘法求出该方程式的参数．从数学角度，只要知道树干任意３个部位的直径，就可以用最小二乘法或联立方程式求解干曲线参数．本文以樟子松为例，探讨用树干哪３个部位直径拟合的干曲线最接近实际干曲线，为建立立木干曲线提供有效方法．利用９个部位半径（方法Ⅰ）和利用其中３个部位半径（方法Ⅱ，２８种组合）分别拟合干曲线，结果表明方法Ⅱ的６种半径组合的精度良好，其中的３种组合，（ｒ１．３，ｒ０．３，ｒ０．７），（ｒ１．３，ｒ０．４，ｒ０．７）和（ｒ１．３，ｒ０．４，ｒ０．８）是拟合现实干曲线的有效方法．
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| 关 键 词： | 樟子松，干曲线，3次多项式 |
The Estimation of Stem Taper Curve from the Radial Information at Three Locations on the Stem |
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| Zheng Xiaoxian Liu Donglan College of Forest Resources and Environment,Beijing Forestry University,Beijing ,P.R.China. The Estimation of Stem Taper Curve from the Radial Information at Three Locations on the Stem[J]. Forestry Studies in China, 1996, 0(1) |
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| Authors: | Zheng Xiaoxian Liu Donglan College of Forest Resources Environment Beijing Forestry University Beijing P.R.China |
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| Affiliation: | Zheng Xiaoxian Liu Donglan College of Forest Resources and Environment,Beijing Forestry University,Beijing 100083,P.R.China |
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| Abstract: | |
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| Keywords: | Pinus sylvestris var. mongolica stem taper curve 3 degree polynomials |
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