(1)根据平均胸径,平均树高查相应树种二元立木材积表得样圆单株立木蓄积,单株立木蓄积乘样木株数得该样圆蓄积。 (2)样圆立本蓄积乘以10得样圆亩蓄积量; (3)各样圆亩蓄积量相加除以样圆个数(有确定成数的加权平均)得小班平均亩蓄积量; (4)小班平均亩蓄积量乘以小班面积得小班总蓄积量。
The BP models for predicting the forest resources, including wooded area prediction, stand volume prediction and age class structure prediction, are developed in this treatise.
本论文采用人工神经网络方法建立了基于人工神经网络的森林资源预测模型,包括有林地面积预测、活立木蓄积量预测、龄级结构预测BP网络模型。
参考来源 - 基于ANN的森林经营决策模型研究·2,447,543篇论文数据,部分数据来源于NoteExpress
由于这些安全带的长度不同,高更换蓄积量的要求,最大限度地减少停机时间。
Due to the different lengths of these belts, a high replacement stock volume was required to minimize downtime.
我国人工林森林蓄积量每公顷只有49立方米,也就是一亩地只有3点几个立方米。
Our man-made forest growing stock per hectare poses/ records only 49 cubic meters that equals only over 3 cubic meters per Mu.
阔叶林分通过株数递减和蓄积量递增而演变,这种演变过程和转移概率的特征是一致的。
The succession of broad-leaved forest by decreasing tree number and increasing storage was in accordance with the characteristics of transfer probability.
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