1) size-class structure
径级结构
1.
The community feature, size-class structure, the regulation of changing density were analyzed and the survival curve,the death curve and the life table were worked out.
分析了白皮松的群落学特征、径级结构及其密度变化规律;绘制了存活曲线和死亡曲线,从多角度研究了白皮松幼林种群的动态变化规律。
2.
(3) Although the size-class structure of Quercus phillyraeoides population showed normal distribution,it could maintain the dominant position in the community depending on the middle-class individuals as regeneration resource;additionally,the Q.
乌冈栎种群的径级结构呈正态分布,可依靠中等径级植株作为更新库维持目前的优势地位,加之其分布环境的特殊性,其群落仍是稳定的顶极群落。
3.
This article investigates the characteristic of distribution pattern, regeneration and size-class structure of Neolitsea homi lantha in different communities\' restoration in Shilin.
喀斯特地区生境严酷、地貌复杂、退化现象普遍,其植被恢复和重建已受到越来越多的关注;调查了石林地区不同恢复群落中团花新木姜子种群的分布格局、繁殖方式、径级结构等特征,结果发现:群落演替由最初到顶级,团花新木姜子呈由均匀到集群再到均匀的分布特征;团花新木姜子兼具有性和无性两种繁殖方式,恢复前期以无性更新为主,后期有性更新占优势;在恢复过程中,该物种先以数量优势占据生境,后期由于竞争保留少数大径级植株,其产生的大量实生幼苗只有少数在竞争中存活下来。
2) size structure
径级结构
1.
The size structure and competitive relationships of Larix chinensis in mixed-conifer forest types on Taibai Mountain,China;
太白红杉(Larix chinensis)混交林径级结构与竞争的关系
2.
Size structure analysis of Quercus wutaishanica (Liaodong oak) forest in a mountainous area of Beijing city indicates that while the oak forest is rather stable its regeneration mainly relies on stem base sprouting.
北京山区的辽东栎 (Quercus wutaishanica)林径级结构的调查分析结果表明 ,辽东栎林是稳定性的群落类型 ,其更新主要通过萌生来完成。
3) height and DBH structures
高度和径级结构
4) changing diameter
变径结构
5) structure radius
结构半径
6) pore structure
孔径结构
1.
) in pore structures.
研究了超大比表面积ACF（K－AcF）对氮的多段吸附机理通过各样品孔径结构（基于DFT）和吸附过程（DR曲线描述）比较分析，探讨不同孔径结构对K－ACF的多段吸附的影响，结合前人工作提出了超大比表面积ACF的多段充填机理，并重点分析了极微孔中的吸附过程（第一吸附段），解释了K-ACF的DR曲线偏离理想DR曲线的原因。
2.
The static adsorption behavior of NH3 on the surface of ACFs with different pore structures was studied at relatively high partial pressure of adsorbate.
探讨了在较高氨分压下，活性炭纤维（ＡＣＦ）对于极性吸附质氨的吸附过程，证明在此过程中，ＡＣＦ孔径结构的重要性。
3.
Based on the existing classification of coal pore structure and data of fifty samples from sixteen coal mine areas where typical high rank coals occured, a classification system of the pore structure suitable to high rank coal was proposed.
在分析现有煤孔径结构划分系统的基础上，根据我国１６个高煤级煤典型矿区５０件样品的孔隙测试数据，提出了适合于高煤级煤的孔隙结构自然分类方案。
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