Now, I would think that it is reasonable to ask the following question: What is the average velocity, for instance, between time zero and time four?
现在，我认为,提出如下问题,是十分合理的：,比如说，平均速度是多少，在0到4秒之间？
The average acceleration 2 between time t1 and time t2 2 would then be the velocity at time t2 minus the velocity at time t1, divided by t2 minus t1.
在t1和t2之间的，这段平均加速度2，等于t2时刻的速度2，减去t 1时速度，再除以。
And now you will understand how we define the instantaneous velocity at time t which is different from an average velocity between two time intervals.
现在明白了吗，t时刻，的瞬时速度是怎样定义的，与两时刻间的平均速度相比，瞬时速度并不一样。
The average flow velocity can not get from the average flow velocity of every monitoring point in the same time, but by a period of time.
因为平均流速不是由同一时间各测点流速取平均值得出的，而是由一段时间内各点的流速取平均值得到的。
It obtains low average mean squared error (MSE), fast convergence velocity and decreases the noise sensitivity at the same time.
该方法计算简单、均方误差小、收敛速度快，并且降低了算法对噪声的敏感性。
The average velocity ratios are very steady, whatever in the long time scale or large spatial scale.
无论是从较长的时间尺度还是从较大的空间范围来看，平均波速比值都是非常稳定的。
The result also shows that RBF neural network laser fluorescence spectra data analysis identification model get the best perform in velocity, the average training time is 5.547 seconds.
神经网络方面，RBF神经网络激光荧光光谱分析识别模型的速度最快，平均训练时间为5.547秒。
Furthermore, the time history and spectrum of the average flow velocity through an orifice are computed, from which the nonlinear distortion of flow velocity is analyzed.
进而计算了圆孔中的声质点速度，并分析了孔中速度的畸变情况、最后给出了圆孔的非线性声阻和声抗的理论值。
Results:The peak systolic velocity and the time average velocity of the central retinal artery of the affected eyes were lower than those of the patients healthy eyes(P<0 0001).
结果：患眼的视网膜中央动脉收缩期峰值血流速度、平均血流速度均低于对侧眼（P＜0．0001）。
The motion tracks of large-size particles are shorter than that of little size ones, and accordingly the average circulation-time are shorter with less effects of aeration velocity.
大粒径粒子较小粒径粒子的平均循环时间短，大颗粒通过喷动区的次数大于小粒子，生长较快。
The better experimental results are acquired using the ADV automatic measuring and analyzing system to measure the time average velocity distribution in turbulence bo…
将声学多普勒流速仪自动测量和分析系统应用于紊流边界层时均流速分布的测量，取得了较好的实验成果。
The better experimental results are acquired using the ADV automatic measuring and analyzing system to measure the time average velocity distribution in turbulence bo…
将声学多普勒流速仪自动测量和分析系统应用于紊流边界层时均流速分布的测量，取得了较好的实验成果。
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