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The effects of pressure ratio and acoustic power on performance of the PTR have been numerically simulated.

计算提高声功和压比对脉管制冷机性能的影响。

The variation tendency of pulse pressure waveform along acoustic axis and in the focal plane has been numerically studied also.

同时还数值研究了脉冲压力波沿声轴和焦平面上的变化趋势，在幅度下降-6 dB的焦斑内没有观察到波形的明显变化。

In the past twenty years continued interests have been focused on adiabatic rapid population transfer and coherence in atomic or molecular system. The stimulated Raman adiabatic passage process has been intensively studied experimentally, analytically, and numerically.

近二十年来，随着科学研究的不断进步，人们对运用绝热快速通道控制原子或分子的布居数和相干性产生了较大的兴趣，并运用受激拉曼绝热过程进行了数值模拟、实验和分析。

It is necessary first to delineate problems that are both of interest in hydrology and are treated advantageously numerically.

有必要首先叙述那些在水文学中有意义且有利于数值处理的问题。

Boundary flow around an aerofoil controlled by streamwise electromagnetic force was simulated numerically at the low Reynolds number.

在低Re数条件下，对流向电磁体积力影响翼型体表面边界层流动过程进行了数值模拟。

The unsteady flow s in a agitator are calculated numerically, and compared with the author′s experimental data.

研究了搅拌器内非定常流场的分布，并与实验结果做了比较。

In addition, the ventilation e2ciency, local mean age of air and other characteristic parameters were experimentally and numerically obtained for a mock-up classroom ventilated with the two systems.

另外，通风e2ciency，当地平均年龄航空等特性参数进行了实验，并取得了数值模拟出教室通风与两种制度。

Several important parameters which could affect the performance of the air curtain were numerically studied.

通过数值计算，对影响风幕性能的几个主要因素进行了分析研究。

The system of differential equations for a geodesic line on an algebraic surface was discredited into a nonlinear system. Then it was solved numerically based on iterative methods.

在算法中，把决定代数曲面测地线的微分方程组离散为一个非线性方程组，然后采用迭代数值方法求解。

Comparing EMD method with traditional FFT method in the analytical process, Hilbert-Huang transformation is found to be superior in performance. Structural response of the warship subjected to underwater explosion is simulated numerically, and EMD method is applied to analyzing the structural impulse signals.

该方法不把信号分解成正弦或余弦函数，因此既能分析线性稳态信号又可用于非线性非平稳信号的分析，且避免了高频干扰结果的出现，被认为是近年来对以Fourier变换为基础的线性和稳态谱分析的一个重大突破。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样