根据盆地内的陨石坑密度估算，SPA盆地似乎最古老，而东方海则最年轻。
Based on crater densities within the basins, SPA appears to be the oldest and Orientale the youngest.
然后天文学家友用哈勃和斯巴鲁望远镜来估算这些物体的距离，并寻找它们周围更高密度的星系。
The astronomers then used Hubble and the Subaru telescopes to estimate the distances to these objects, and look for higher densities of galaxies around them.
如果我们测得地震波的走时和振幅，我们就能够确定地下的几何形状并估算与岩石速率和密度有关的声阻抗。
Seismic measurements of travel time and amplitude define the subsurface geometry and give estimates of the acoustic impedances related to rock velocities and densities.
在介绍标准贯入N值归一化研究成果的基础上，提出了用归一化标准贯入N值估算正常固结砂土相对密度的方法。
Based on the research of normalization of SPT -n, a method to estimate the relative density of normally consolidated sandy soils is proposed.
推导了无线电波传输路径上各点经纬度及高度坐标等参数，并在此基础上进行了波束覆盖区功率密度的估算。
On the basis of the previous work, the authors make an estimation about power density within the beam covered area.
本文提出了一种从镏分恩氏蒸馏数据和总体密度对石油馏分进行假组分切割和物性估算的方法。
A characterization approach for petroleum fractions based on the ASTM distillation data and the overall density has been proposed.
实践证明，在一定功率密度范围内，估算值较好地符合了实验测定数据。
Experiment shows that measured data in certain power density range accord well with the calculations.
反应能量主要采用原子团加和方法以及密度泛函理论进行估算。
Reaction energy was always estimated by Group additivity method and density functional theory.
用平均平滑周期图法分别估算出信号与噪声的功率谱密度函数。
The power spectrum of the noise and signal are estimated by the average smooth periodogram method.
由福建省2001—2006年营运汽车数量的变化和福建省公路总里程的增加及公路密度的增长情况入手，根据欧Ⅰ和欧Ⅱ排放标准估算出2006年营运汽车排放的尾气总量。
We present the change of business vehicle numbers in Fujian during 2001 and 2006, together with the increase of total highway mileage and highway density in the same period.
由福建省2001—2006年营运汽车数量的变化和福建省公路总里程的增加及公路密度的增长情况入手，根据欧Ⅰ和欧Ⅱ排放标准估算出2006年营运汽车排放的尾气总量。
We present the change of business vehicle numbers in Fujian during 2001 and 2006, together with the increase of total highway mileage and highway density in the same period.
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