The establishment and prediction of the dynamic variation model of wood growth ring density for the plantation forest of Pinus koraiensis

1、

As planting density increased, the growth ring width and tracheid row decreased but proportion of late wood increased.

造林密度大，则生长轮变窄，管胞列数减少，晚材率增加。

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2、

Study on relationship between sound vibration parameters and growth ring width and latewood percentage of Picea genera wood

云杉木材声振动性能与生长轮宽度、晚材率之间关系的研究

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3、

The contents of cellulose, lignin and pentosan related significantly to the ages of growth ring.

纤维素、戊聚糖及木质素含量与生长轮年龄高度相关。

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4、

⑵ with the increase of the growth ring number, the pore number reduced, but the pore diameter increase;

⑵管孔数目随生长轮数的增加而减少，而导管切向直径却增加。

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5、

Fossil woods with distinct growth ring show that the climate has seasonal change obviously during that time.

化石木清晰的生长轮表明当时气候具明显的季节性。

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6、

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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7、

Response of carbon isotope composition of Chinese red pine annual growth ring cellulose to East China temperature variations

中国红松年轮纤维素碳同位素组成对中国东部气温变化的响应

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8、

Types of Growth Ring and Vessel Arrangment of Broad Leaved woods

论阔叶树材的生长轮类型和导管排列

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9、

Preliminary exploration of the micro-hardness of wood& analysis of wood quality of the growth ring 3

木材显微硬度的初步探索&生长轮材质分析之三

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10、

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

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11、

Effects of Variance Coefficient of Growth Ring Width on Sound Vibration Parameters of Picea Wood

云杉属木材生长轮宽度变异系数对声振动参数的影响

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12、

A long-term forecast method of timber growth ring density based on process neural network was proposed in this paper.

提出一种基于过程神经网络的木材生长轮密度长期预测方法。

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13、

The distribution of the moisture content of each growth ring in wood using X-ray densitometry

用X射线密度计测定木材年轮的含水率分布

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14、

Studies on the variation of the growth ring wood quality of Cunninghamia lanceolata

杉木生长轮材质变异的研究

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15、

Preliminary study on the correlation of annual growth ring width of Beijing poplar climatic factors

北京杨年轮宽度与气候因子相关性初探

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16、

Onthe basis of data obtained, we analyzed the variation of wood growth ring.

根据测得的数据，分析了木材生长轮材性变异规律。

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17、

The existence of growth ring was a potential threat to the safety of water supply.

生长环的存在是安全供水的潜在威胁。

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18、

Analysis of wood quality of the growth ring ( 1) and determination of wood density

关于木材密度测定&生长轮材质分析之一

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19、

Study on the prediction for the wood quality of growth ring of Korean pine

红松林木生长轮材质预测的研究

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20、

Trace of Growth Ring, Exhibition of Beijing Youth Art Society;

《年轮的遗痕》参加北京青年画会首届会员作品展（中国美术馆）；

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