论文部分内容阅读
人们常用预报商用材与总材积之比的模型来推导出标准总材积公式。这是根据Clutter(1980)以梢端直径为变量的商用材公式导出尖削度公式的方法扩展而来的。利用导出的材积公式展开的尖削度曲线必须通过伐根高的直径。推导出的材积公式连同Clutter(1980)的结果都是总材积与由商用材比总材积的比率模型这个特定形式导出的尖削度公式兼容系统的一部分。
Commonly used to predict the ratio of commercial timber and total volume model to derive the standard total volume formula. This is based on Clutter’s (1980) extension of the tip taper formula using the formula for the tip diameter as a variable. The taper curve developed using the derived volume formula must pass through the diameter of the cut-height. The derived volume formula, together with the result of Clutter (1980), is part of a system that is compatible with the taper formula derived from the specific form of the ratio of the total volume to the ratio of the commercial material to the total volume.