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annual growth ring
相关语句
  年轮
     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
短句来源
     According to correlation analysis, the annual growth ring width at 1. 3m high of Beijing poplar is interrelated positivelly with precipitation, but is interrelated negativelly with sunshine time, relative moisture, ground temperature, ≥10℃ accumulated temperature and wind velocity.
     以渭北黄土残源区塬面北京杨护路林为对象,进行胸高年轮宽度与气候因子相关性分析,结果表明:降雨量与年轮宽度呈正相关,与日照时数、相对湿度、地温、≥10℃积温呈负相关;
短句来源
     The results of annual growth ring width being predicted according to climatic factors show that there are 13 and 12 samples that have positive and negative error seperately (total samples 25) and the maxium error is 0. 282 8mm. Its show that the equation is useful.
     通过年轮宽度预报,25个样本中,正差13个,负差12个,最大误差为-0.28283,方程实用性强。
短句来源
  “annual growth ring”译为未确定词的双语例句
     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
短句来源
     Based on the residual of Picea purpurea Mast,some data of stratigraphic age determination and lake-formedgeomorphies,combining with annual growth ring of trees and observing lake water,evolutional history of Qinghai Lake duringnear 8000 years is discussed,further,its developing trend has been briefly forecasted.
     本文依据紫果云杉(Picea purpurea Mast)残木、部分地层测年资料、湖成地貌,结合树木年轮和湖水观测资料,探讨近8000年来青海湖演变史并概略预测其发展趋势:8000—3500a. B.P.
短句来源
     In this paper,we try to verify the effectiveness of heuristic segmentation algorithm in dealing with nonlinear time series by an ideal time series. Through detecting and analyzing the information of abrupt climate changes contained in recent 2000a's tree annual growth ring,we succeeded in distinguishing abrupt changes with different scales.
     在BG算法的基础上,通过理想时间序列验证BG算法处理非平稳时间序列的有效性,并对近2000a北半球树木年轮距平宽度序列基于不同层次的思想,检测和分析其中包含的各种尺度的气候突变事件,成功地区分不同尺度的突变.
短句来源
  相似匹配句对
     annual growth rhythm;
     高、径生长;
短句来源
     I——RING WITH D. C. C
     满足降链条件的Ⅰ—环
短句来源
     The growth of E.
     重组HBD 2对E.
短句来源
     The cell area is the most important factor to study the growth of the wood in a annual ring.
     若对木材细胞生长规律进行研究,最直接的参数便是细胞面积。
短句来源
     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
短句来源
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  annual growth ring
Lack of annual growth ring production at the base of branches in the lower portion of the crown is a commonly observed phenomenon.
      
The cellulose produced in the annual growth ring was linearly related to source water with differences in both slope and offset associated with greenhouse humidity.
      
The analysis shows that the changes in the composition of the xylem that occur over one annual growth ring can be monitored with FT-IR microimaging.
      
The medical scanner could not satisfactorily measure density in carlywood or latewood resions even in samples where the annual growth ring width was of the order of 3.5 mm.
      
These test pieces had annual growth ring widths varying between about 0.6 mm and 3.5 mm.
      
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Based on the residual of Picea purpurea Mast,some data of stratigraphic age determination and lake-formedgeomorphies,combining with annual growth ring of trees and observing lake water,evolutional history of Qinghai Lake duringnear 8000 years is discussed,further,its developing trend has been briefly forecasted.It was warm—humid at 8000 a.B.P.After 600 a.B.P.there were several transformations between warm—humid and cold—dry.Were there no greenhouse effect,the lake water would reach a balance period of...

Based on the residual of Picea purpurea Mast,some data of stratigraphic age determination and lake-formedgeomorphies,combining with annual growth ring of trees and observing lake water,evolutional history of Qinghai Lake duringnear 8000 years is discussed,further,its developing trend has been briefly forecasted.It was warm—humid at 8000 a.B.P.After 600 a.B.P.there were several transformations between warm—humid and cold—dry.Were there no greenhouse effect,the lake water would reach a balance period of recharge and consumption of water in 133 years,but under the influence ofgreenhouse effect the lake water will enter the balance period ahead of schedule,in the middle of next century.

本文依据紫果云杉(Picea purpurea Mast)残木、部分地层测年资料、湖成地貌,结合树木年轮和湖水观测资料,探讨近8000年来青海湖演变史并概略预测其发展趋势:8000—3500a.B.P.为暖湿期,3500a.B.P.以来渐趋冷干—干旱,600a.B.P.以来又几经暖湿—冷干的更替;在不考虑温室效应的前提下,大致在133年后湖水达补耗水量平衡期;在温室效应的影响下,湖水将提前于下世纪中叶进入补耗平衡期。

According to correlation analysis, the annual growth ring width at 1. 3m high of Beijing poplar is interrelated positivelly with precipitation, but is interrelated negativelly with sunshine time, relative moisture, ground temperature, ≥10℃ accumulated temperature and wind velocity. The order of the correlation is: precipitation > sunshine time > relative moisture > groud temperature >≥10℃ accumulated temperature >wind velocity. A multi varible regress ation is propaned in this paper and the confidence...

According to correlation analysis, the annual growth ring width at 1. 3m high of Beijing poplar is interrelated positivelly with precipitation, but is interrelated negativelly with sunshine time, relative moisture, ground temperature, ≥10℃ accumulated temperature and wind velocity. The order of the correlation is: precipitation > sunshine time > relative moisture > groud temperature >≥10℃ accumulated temperature >wind velocity. A multi varible regress ation is propaned in this paper and the confidence test show that this equation is reliable (R=0. 8839). The results of annual growth ring width being predicted according to climatic factors show that there are 13 and 12 samples that have positive and negative error seperately (total samples 25) and the maxium error is 0. 282 8mm. Its show that the equation is useful.

以渭北黄土残源区塬面北京杨护路林为对象,进行胸高年轮宽度与气候因子相关性分析,结果表明:降雨量与年轮宽度呈正相关,与日照时数、相对湿度、地温、≥10℃积温呈负相关;相关顺序为:年降雨量>日照时数>相对湿度>地温>≥10℃积温>风速。建立的多元回归方程,经可靠性检验,复相关系数为0.88393,方程可靠。通过年轮宽度预报,25个样本中,正差13个,负差12个,最大误差为-0.28283,方程实用性强。

Climate system is nonlinear,non-stationary and hierarchical,which makes even harder to detect and analyze abrupt climate changes.Based on Student's t-test,Bernaola Galvan recently proposed a heuristic segmentation algorithm to segment the time series into several subsets with different scales,which is more effective in detecting the abrupt changes of nonlinear time series.In this paper,we try to verify the effectiveness of heuristic segmentation algorithm in dealing with nonlinear time series by an ideal time...

Climate system is nonlinear,non-stationary and hierarchical,which makes even harder to detect and analyze abrupt climate changes.Based on Student's t-test,Bernaola Galvan recently proposed a heuristic segmentation algorithm to segment the time series into several subsets with different scales,which is more effective in detecting the abrupt changes of nonlinear time series.In this paper,we try to verify the effectiveness of heuristic segmentation algorithm in dealing with nonlinear time series by an ideal time series.Through detecting and analyzing the information of abrupt climate changes contained in recent 2000a's tree annual growth ring,we succeeded in distinguishing abrupt changes with different scales.The research based on the newly defined paramcter of abrupt change density shows that human activities might have lead to the recent 1000a's unbalanced distribution of serial and spares segments of abrupt climate changes,which may be one of the manifestations of global temperature change.

气候系统的非线性、多层次性和非平稳性对气候突变的检测方法提出了较高的要求.基于t检验将非平稳序列分割为多个不同尺度的自平稳子序列,Bernaola Galvan提出的启发式分割算法(BG算法),对非平稳时间序列的突变检测效果较好.在BG算法的基础上,通过理想时间序列验证BG算法处理非平稳时间序列的有效性,并对近2000a北半球树木年轮距平宽度序列基于不同层次的思想,检测和分析其中包含的各种尺度的气候突变事件,成功地区分不同尺度的突变.定义的新物理量——突变密度的分析表明,自然因素作用的基础上,人为因素影响的加剧可能导致近1000a来突变密集段和稀疏段分布失衡,这可能是全球变化的重要表现之一.

 
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