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特征时间尺度
相关语句
  characteristic time scale
     A data set generated by integrating a nonlinear barotropic vorticity equation model with an orographic forcing is used to study the characteristic time scale of EOF temporal coefficients in streamfunction anomalies.
     使用地形强迫正压涡度方程模式的输出资料,讨论了流函数异常EOF展开时间系数的特征时间尺度
短句来源
     EMD is based on the local characteristic time scale of signal and decompose the complicated signal into a number of Intrinsic Mode Functions (IMFs). By analyzing each IMF component that involves the local characteristic of the signal, the characteristic information of the original signal could be extracted more accurately and effectively.
     EMD方法基于信号的局部特征时间尺度,可把信号分解为若干个内禀模态函数(Intrinsic Mode Function,简称IMF)之和,分解出的各个IMF分量突出了数据的局部特征,对其进行分析可以更准确有效地把握原数据的特征信息。
短句来源
     In the longer time changes,the location of the largest amplitude energy center corresponding to the 5-year characteristic timescale has a tendency to move towards the south.
     从较长时间的长期演变来看,5a特征时间尺度的最大振幅能量活动中心的位置有一种向南移动的趋势.
短句来源
     The spray and combustion models of the code were modified. In the modification, Kelvin-Helmholtz and Rayleigh-Taylor model was applied to describe the breakup process of injection spray and the improved Shell auto-ignition model was adopted to simulate the ignition process. In addition, the post-ignition combustion simulation was performed with a multiple laminar and turbulent characteristic timescale combustion model for taking into account the effects of both turbulence and chemical kinetic on combustion.
     为了更好地模拟直喷式柴油机的喷雾及燃烧过程,对Kiva-3程序的喷雾和燃烧模型进行了改进,引入Kelvin Helmholtz和Rayleigh Taylor模型来模拟油滴破碎过程,采用改进的Shell自燃模型来模拟着火过程,为了综合考虑化学动力学和湍流对燃烧的影响,采用层流和湍流多重特征时间尺度燃烧模型来模拟燃烧过程.
短句来源
     For the larger characteristic timescale,the time phases of the flow's variations influenced by the monthly climate changes over Yunnan always lag the time phases of the upper reaches Lancang River flow's variations.
     而对于较大特征时间尺度的变化,云南月气候变化造成的澜沧江月径流量变化则总是滞后于澜沧江上游的月径流量变化.
短句来源
更多       
  characteristic timescale
     A data set generated by integrating a nonlinear barotropic vorticity equation model with an orographic forcing is used to study the characteristic time scale of EOF temporal coefficients in streamfunction anomalies.
     使用地形强迫正压涡度方程模式的输出资料,讨论了流函数异常EOF展开时间系数的特征时间尺度
短句来源
     EMD is based on the local characteristic time scale of signal and decompose the complicated signal into a number of Intrinsic Mode Functions (IMFs). By analyzing each IMF component that involves the local characteristic of the signal, the characteristic information of the original signal could be extracted more accurately and effectively.
     EMD方法基于信号的局部特征时间尺度,可把信号分解为若干个内禀模态函数(Intrinsic Mode Function,简称IMF)之和,分解出的各个IMF分量突出了数据的局部特征,对其进行分析可以更准确有效地把握原数据的特征信息。
短句来源
     In the longer time changes,the location of the largest amplitude energy center corresponding to the 5-year characteristic timescale has a tendency to move towards the south.
     从较长时间的长期演变来看,5a特征时间尺度的最大振幅能量活动中心的位置有一种向南移动的趋势.
短句来源
     The spray and combustion models of the code were modified. In the modification, Kelvin-Helmholtz and Rayleigh-Taylor model was applied to describe the breakup process of injection spray and the improved Shell auto-ignition model was adopted to simulate the ignition process. In addition, the post-ignition combustion simulation was performed with a multiple laminar and turbulent characteristic timescale combustion model for taking into account the effects of both turbulence and chemical kinetic on combustion.
     为了更好地模拟直喷式柴油机的喷雾及燃烧过程,对Kiva-3程序的喷雾和燃烧模型进行了改进,引入Kelvin Helmholtz和Rayleigh Taylor模型来模拟油滴破碎过程,采用改进的Shell自燃模型来模拟着火过程,为了综合考虑化学动力学和湍流对燃烧的影响,采用层流和湍流多重特征时间尺度燃烧模型来模拟燃烧过程.
短句来源
     For the larger characteristic timescale,the time phases of the flow's variations influenced by the monthly climate changes over Yunnan always lag the time phases of the upper reaches Lancang River flow's variations.
     而对于较大特征时间尺度的变化,云南月气候变化造成的澜沧江月径流量变化则总是滞后于澜沧江上游的月径流量变化.
短句来源
更多       
  characteristic time scales
     The result of the study shows:(1) The cultivated area in china has 13 years, 19 years and 27 years characteristic time scales. The main mutation points are at the year of 1950, 1960, 1978, 1985, 1992 and 2000. It is observed that national policies, natural disasters and national economy are the main factors which cause cultivated area fluctuations.
     (1) 我国的耕地面积波动主要存在13年、19年和27年的特征时间尺度,突变点主要分布在1950年、1960年、1978年、1985年、1992年和2000年前后。
短句来源
     The wavelet analysis has been used to analyze the total food in Jiangxi from 1949 to 2003. The results show: The total food has 15years, 24years and 37years characteristic time scales and corresponding changes from the figures of the wavelet coefficients;
     江西食物总量变化小波分析表明,1949-2003年江西食物总量变化具有15年、24年和 37年的特征时间尺度和相应的周期变化特征;
     The results show that there are 2,5,10 years and maximum characteristic time scales for the interannual change of South Asia High in summer.
     结果表明:夏季南亚高压年际变化的特征时间尺度分别约为2,5,10年和更长的时间尺度。
短句来源
     Characteristic Time Scales of Interannual Change of South Asia High in Summer and Its Temporal-Spatial Evolution
     夏季南亚高压年际变化的特征时间尺度及其时空演变
短句来源
     The results show that the grain output has 5-year, 13-year and 27-year characteristic time scales and corresponding changes from the figures of the wavelet coefficients. At the same time, the time scales tend to become longer,which indicates that the changes in the grain output of Hunan province become stable step by step.
     分析结果表明:建国以来湖南省粮食产量变化具有明显的 5年、13年和 27年的特征时间尺度和相应的周期性变化特征,并且特征时间尺度有逐步增加的趋势,即湖南省的粮食产量变化渐趋稳定;
短句来源
更多       
  “特征时间尺度”译为未确定词的双语例句
     The largest amplitude energy centers corresponding to the 2-year and 5-year characteristic timescales are located at the(27.5°N,135°E)and(35°N,167.5°E)respectively.
     2 a和5 a特征时间尺度的最大振幅能量活动中心分别位于北太平洋西部的(27.5°N,135°E)附近和北部的(35°N,167.5°E)附近;
短句来源
     the grain food output had characteristic of the time scales and the characteristics of periods variation of 3~9,10~25 and 18~32 years,respectively;
     烟台市粮食年产量变化具有明显的3~9、10~25和18~32年3类特征时间尺度和相应的周期变化特征;
短句来源
     The result showed that:(1)there were fluctuations of about 3-year,6-year,11-year and 50-year time scale.
     结果表明:(1)洪涝灾害成灾面积存在准3年、准6年、准11年和准50年左右特征时间尺度的周期性波动;
短句来源
     The results show that the inundated areas fluctuate with 3 time scales,quasi-3-year,quasi-8-year and quasi-22-year.
     结果表明:湖南省洪涝灾害成灾面积存在着准3年、准8年和准22年左右特征时间尺度的周期性波动;
短句来源
     The 7,30 and 74 months' characteristic timescales of Yinjinghong are due to the flow's variations of Jiuzhou,but the 14 and 21 months' characteristic timescales of Yinjinghong are due to the monthly climate changes over Yunnan.
     澜沧江下游允景洪的约7个月、30个月和74个月的特征时间尺度的月径流量变化主要是由澜沧江上游旧州的月径流量变化造成的; 而澜沧江下游允景洪的约14个月和21个月的特征时间尺度的月径流量变化则完全是由云南境内的月气候变化造成的.
短句来源
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  characteristic time scale
The characteristic time scale of the variations of the surface temperature or the gas suction velocity on the attachment line is assumed to be equal to the characteristic aerodynamic time.
      
The intensity variation of the pulsar are shown to be consistent with the presence of a periodicity in the system with a characteristic time scale of ~61 days.
      
Variations in |M| may be due to the rapid motion of filaments with a characteristic time scale ?103 s.
      
For the second problem, we analytically find a characteristic time scale at which the quantum dynamics differs insignificantly from the classical one.
      
The characteristic time scale of the avalanche amplification is calculated as a function of the overvoltage δ relative to the minimum value of the drag force between the electrons and the atomic particles of the medium.
      
更多          
  characteristic timescale
The observed characteristic timescale of the variability strongly suggests that stellar rotation plays a dominant role.
      
The characteristic timescale of the variations (the 'cycle period') appears to depend on Ro for old stars, but shows no clear dependence on either rotation rate or spectral type for younger stars.
      
The light curve shows high and low states which alternate with a characteristic timescale of ~1 year.
      
In addition we report the discovery of short timescale intensity variations (down to ~ 50 msec) with a characteristic timescale of ~ 20 sec.
      
We show the characteristic timescale and occurrence frequency of 'magnetically dominated' solar wind, whose interaction with a planetary magnetosphere may produce a bow shock with multiple shock fronts.
      
更多          
  characteristic time scales
The thermodynamic relations, stratification, and characteristic time scales are obtained as functions of the coefficients in the equation of state.
      
The fast (on characteristic time scales of shorter than an hour) variability of the He II 4686 profile that was previously revealed by our observations (Kholtygin et al.
      
For example, in both types of object, the radio luminosities are proportional to characteristic time scales-for precession for AGN or rotation for pulsars-to the 0.8 power.
      
The amplitudes and characteristic time scales of the variations of the mean annual brightness are taken to be indicators of photospheric activity and were used to infer the levels of photospheric activity in the stars studied.
      
Light curves in the B and V bands obtained from August 8, 2000, through May 25, 2001, reveal variability with characteristic time scales from 10 to 40 days.
      
更多          


In this paper, the biochemical and dynamical processes of chemical substance and biomass in contaminated ground water are presented. As an example,a mathematical model to quantify the interaction and movement of organism and bacteria in nonhomogeneous ground water flow is developed. Some important problems such as large gradient and different characteristic time occurring in the governing equations are briefly described, which is important for numerical modelling.

介绍了受污染的地下水中化学物质与微生物相互作用的生化与动力过程。作为例子,提出了一个定量描述非均匀地下水流中有机物与细菌迁移变化的数学模型,并简要介绍了出现在控制方程中几个应关注的问题,如变量大梯度与特征时间尺度问题,以利于数值求解。

A data set generated by integrating a nonlinear barotropic vorticity equation model with an orographic forcing is used to study the characteristic time scale of EOF temporal coefficients in streamfunction anomalies.Then a most persistent mode(MPM) is determined and its influence on predictability is investigated. It is found that there is a close correlation between the MPM.and the evolution of circulation anomalies, and the structure of initial fields has obvious impact on predictability.Finally the potential...

A data set generated by integrating a nonlinear barotropic vorticity equation model with an orographic forcing is used to study the characteristic time scale of EOF temporal coefficients in streamfunction anomalies.Then a most persistent mode(MPM) is determined and its influence on predictability is investigated. It is found that there is a close correlation between the MPM.and the evolution of circulation anomalies, and the structure of initial fields has obvious impact on predictability.Finally the potential application of atmospheric MPM to the extended-and medium-range weather forecasts is discussed.

使用地形强迫正压涡度方程模式的输出资料,讨论了流函数异常EOF展开时间系数的特征时间尺度。由此研究了异常持续类型的确定及其对可预报性的影响问题。结果表明:异常持续类型与环流的演变有十分密切的关系,初始状态环流的结构对可预报性有明显的影响。最后探讨了对中期和延伸期数值预报的可能应用。

In climatology, the cool/warm duration is defined as time duration which the mean temperature is lower/higher. The cool/warm duration is a relative concept. In this paper, the wavelet transform is applied to surface air temperature (SAT) time series analyses for the Northern/Southern Hemisphere (NH/SH) during the last one hundred years. The cool/warm duration in different time scales are revealed. They constitute the hierarchical structure of SAT variations. On the basis of the hierarchical structure, the trend...

In climatology, the cool/warm duration is defined as time duration which the mean temperature is lower/higher. The cool/warm duration is a relative concept. In this paper, the wavelet transform is applied to surface air temperature (SAT) time series analyses for the Northern/Southern Hemisphere (NH/SH) during the last one hundred years. The cool/warm duration in different time scales are revealed. They constitute the hierarchical structure of SAT variations. On the basis of the hierarchical structure, the trend of future climate change is predicted. The results are as following: 1. SAT variations obviously appear features of climate jump. For Jones climate time series: In large time scale, the cool/warm duration last about 77 years in NH and 90 years in SH. The climate jump happened at 1923 in NH and 1939 in SH. In small time scale, the cool/warm duration last about 14 years in NH and 5.6 years in SH. 2. According to the results of Jones climate time series, the trend of future climate change in NH will be: (1) The large warm duration is from 1923 to 2001. A large cool duration will begin at 2001; (2) The small cool duration is from 1991 to 2001, so the global warming caused by the strong increment of greenhouse effect will be stopped.

用子波变换分析了Jones和Vinnikov南北半球近百年来气温资料,确定了气温变化的层次结构。结果发现,北半球在1923年前后、南半球在1939年前后发生了一次较大时间尺度的冷暖突变。提出了预测未来气候变化趋势的新思路,即根据气温变化的层次结构和不同层次的冷暖期特征时间尺度,预测未来气候变化。认为在北半球1923至2001年为大暖期,从2001年起将进入大冷期,大冷期约有77年;1991年至2001年是大暖期中相对凉爽的时期,80年代的增温事件将从1991年起趋于缓和。

 
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