红桦 meaning in Chinese

betula albo-sinensis
red birch (betula lutea mchx.)
river birch
yellow birch

Thesis establishes forest volume prediction model of red - birch ' s five - age group and the wooded area prediction model by rolling prediction and multi - step prediction of ann which structures are 5 - 25 - 5 and 4 - 10 - 1 . thesis predicts red - birch ' s five - age group volume and the wooded area of experimental district from 2000 to 2004 . in order to evaluate the precision of the model , the author establishes the gm ( 1 , 1 ) model
论文中应用人工神经网络滚动预测和多步预测方法，分别采用5 - 25 - 5和4 - 10 - 1神经网络结构建立实验区红桦5个龄组的蓄积量预测模型与有林地面积预测模型，预测了实验区2000 2004年红桦各龄组蓄积量以及有林地面积。
Ecological features , function indicators and social - human impact together constitute the fundermental system of regional ecosystem health assessment . haxi forestry center is located in tianzhu of gansu province . in view of the natural conditions , land use type and forest map , we classify the research area into 15 landscape types
甘肃天祝县哈溪林区位于祁连山东段，依据哈溪林区的自然条件、土地类型和林相图，将研究区划分为苗圃，未成林地，宜林地，农田，牧草地，荒地，青海云杉林，祁连圆柏，针叶混交林，杨类阔叶林，红桦、榆、山杨硬阔林，针阔混交林、灌木林、疏林地和阔叶混交林等15种景观类型。