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growth ring density
相关语句
  生长轮密度
     THE ESTABLISHMENT AND PREDICTION OF THE DYNAMIC VARIATION MODEL OF WOOD GROWTH RING DENSITY FOR THE PLANTATION FOREST OF PINUS KORAIENSIS
     人工林红松木材生长轮密度动态模型建立与预测
短句来源
     Study on Wood Microfibril Angle and the Correlation Models with Growth Ring Density of Ginkgo
     银杏木材微纤丝角及其与生长轮密度相关模型的建立
短句来源
     The property indexes of physical and anatomical characteristics of planted Scotch pine in different aspects have significant difference in the radial directional variation, such as the growth ring width, the earlywood width, the latewood width, the growth ring density, the earlywood density, the latewood density, the earlywood tracheid length, earlywood tracheid wall thickness, latewood tracheid wall thickness, the earlywood tracheid radial diameter, the latewood tracheid radial diameter, the latewood cell wall percentage, the earlywood wall/lumen, the latewood wall/lumen and the resin canal percentage.
     不同坡向人工林樟子松物理和解剖特征各项指标中生长轮宽度、早材宽度、晚材宽度、生长轮密度、早材密度、晚材密度、早材管胞长度、早材管胞壁厚、晚材管胞壁厚、早材管胞径向直径、晚材管胞径向直径、晚材胞壁率、早材壁腔比、晚材壁腔比、树脂道组织比量径向变异差异显著。
短句来源
     There are significant effects for thinning intensity on growth ring width, late wood percentage, growth ring density and hardness of Fraxinus mandshurica .
     对生长轮宽度、晚材率、生长轮密度、木材硬度有显著影响 ;
短句来源
     According to the theory and method of time-series analysis, the growth rings ARIMA model of wood properties variation pattern for Larix olgensis H. plantation was studied, the model recognition and parameter estimation was discussed, the ARIMA model of wood growth ring density, growth ring width and late wood percentage was obtained.
     采用时间序列分析理论,分析了人工林长白落叶松木材生长轮材性变异规律,对木材的生长轮密度、晚材率和生长轮宽度进行变异规律的拟合,并对建模方法、模型参数选择以及检验进行讨论。
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  “growth ring density”译为未确定词的双语例句
     And the availability and effectiveness of the algorithm is proved by forecast of timber growth ring density.
     并以木材生长密度预测为例,验证了算法的有效性.
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  相似匹配句对
     The growth of E.
     重组HBD 2对E.
短句来源
     I——RING WITH D. C. C
     满足降链条件的Ⅰ—环
短句来源
     The difference of growth-ring width is not significant.
     生长轮宽度差异不显著。
短句来源
     Growth Ring Wood Property Test Analysis
     树木生长轮材质检测分析法
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     q -Baer ring.
     q-Baer环.
短句来源
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  growth ring density
Lumen diameter increased with cambial age, whereas the proportion of latewood and growth ring density increased after an initial decrease in the first 5?years.
      
The anatomical property indexes, including tracheid length, tracheid diameter and wall-indiameter ratio, and the physical property indexes, such as growth ring width, late wood percentage and growth ring density, were measured for wood properties.
      
The ARIMA model of wood growth ring density, growth ring widith and late wood percentage was obtained.
      
The mathematical models of property parameters were obtained on tracheid length, microfibril angle, late wood percentage, growth ring width and growth ring density in the radial direction.
      
Estimates of heritability and genetic correlations among growth ring density components varied considerably depending upon the demarcation criteria.
      


According to the theory and method of time-series analysis, the growth rings ARIMA model of wood properties variation pattern for Larix olgensis H. plantation was studied, the model recognition and parameter estimation was discussed, the ARIMA model of wood growth ring density, growth ring width and late wood percentage was obtained. The result indicated that the goodness of simulation was better by comparing with the actual test data variation pattern,it can simulate not only generalchangement...

According to the theory and method of time-series analysis, the growth rings ARIMA model of wood properties variation pattern for Larix olgensis H. plantation was studied, the model recognition and parameter estimation was discussed, the ARIMA model of wood growth ring density, growth ring width and late wood percentage was obtained. The result indicated that the goodness of simulation was better by comparing with the actual test data variation pattern,it can simulate not only generalchangement tendency of wood properties, but also periodicity fluctuation of slight changement.

采用时间序列分析理论,分析了人工林长白落叶松木材生长轮材性变异规律,对木材的生长轮密度、晚材率和生长轮宽度进行变异规律的拟合,并对建模方法、模型参数选择以及检验进行讨论。结果表明,模型的拟合良度较好,不但能拟合出木材材性总体变化趋势,而且能拟合出细微变化周期性波动。

The variation Pattern of wood tracheid morphology and wood physical mechanics properties of pinus taedaL. was studied in this paper. The mathematical models of the variation pattern of tracheid length, tracheiddiameter, ratio of tracheid length and width, microfibril angle. growth ring width. late wood percentage. cell wallratio and growth ring density were obtained. which can provide the theoretical base of man-made forestintensive management and oriented cultivation as well as the early forecast of wood...

The variation Pattern of wood tracheid morphology and wood physical mechanics properties of pinus taedaL. was studied in this paper. The mathematical models of the variation pattern of tracheid length, tracheiddiameter, ratio of tracheid length and width, microfibril angle. growth ring width. late wood percentage. cell wallratio and growth ring density were obtained. which can provide the theoretical base of man-made forestintensive management and oriented cultivation as well as the early forecast of wood quality.

研究分析了火炬松管胞形态和木材物理力学特征量的变异规律.得出了管胞长度、管胞直径、管胞长宽比、微纤丝角、生长轮宽度、晚材率、胞壁率和生长轮密度等材性指标变异规律的数学模型,为实现林木定向培育和速生优质制定科学集约经营措施以及材质的早期预测提供科学的理论依据。

The genetic variation in wood densities of triploid clones of Populus tomentosa Carr. were investigated and the variations in wood densities among clones, radial direction and vertical direction were studied in this paper. The average values of growth ring densities, early wood densities, late wood densities were 0 444,0 428,0 511 g/cm 3 respectitively. There were significant differences among clones and among growth rings in wood densities.The radial direction...

The genetic variation in wood densities of triploid clones of Populus tomentosa Carr. were investigated and the variations in wood densities among clones, radial direction and vertical direction were studied in this paper. The average values of growth ring densities, early wood densities, late wood densities were 0 444,0 428,0 511 g/cm 3 respectitively. There were significant differences among clones and among growth rings in wood densities.The radial direction variation in wood densities were unstably accending, the vertical variation patterns were not identical.Clonal repeatabilities of growth ring densities, early wood densities, late wood densities of air dry timber were 0 89, 0 92 and 0 86 respectitively.This indicated wood densities were under strong genetic controls.

该文对三倍体毛白杨无性系气干密度的无性系间和株内径向、纵向的变异进行了研究 ,结果表明 :无性系全年轮密度、早材密度和晚材密度平均值分别为 0 .44 4,0 .42 8和 0 .5 11g/cm3.气干密度在无性系间和年轮间存在显著差异 ;株内径向变异随树龄增加呈波动性的上升趋势 ;株内纵向变异趋势在取样范围内不一致 .全年轮密度、早材密度和晚材密度的无性系重复力分别为 0 .89,0 .92和 0 .86 ,说明木材气干密度受到强度遗传控制 .

 
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