模拟实验

By using the method of direct numerical simulation, the coherent structures in the wall region of a turbulent boundary layer with either steady or changing pressure gradients were studied.

采用共振三波的一个周期作为湍流边界层近壁区相干结构的初值，用直接数值模拟方法对有压力梯度，包括定常压力梯度和变压力梯度作用下相干结构的演化进行了研究，得出其各种特性的变化与实验观测到的结果一致。

The directivity responses of the speaker with and without the reflector are compared in simulation and verified with measurement.

文章模拟比较了扬声器加与不加反射器的指向性响应，并在消声室里进行实验验证。

PIV experiments were performed to study Kelvin-Helmholtz discrete sub-vortices. Numerical simulation was performed to study this phenomena and spectrum of the discrete sub-vortices is discussed.

利用PIV实验对剪切层中由Kelvin-Helmholtz不稳定性引起的小涡运动状态进行了分析，对小涡脱落频率进行了统计；进而利用数值模拟的方法，也得到小涡脱落的频谱。

The simulated results indicate that the properties of the chaotic dynamic system are sensitive to the driven frequency. A threshold value of amplitude exists for the appearance of chaos phase. The system is insensitive to the dissipative magnetic force.

数值模拟结果表明：混沌实验摆系统动力学性质灵敏地依赖于策动频率值；系统策动振幅必须大于一定阈值是混沌相出现的必要条件；磁阻尼参数对系统混沌相动力学状态影响不明显。

The theoretical research, computer simulation and experimental results analysis show that maskless laser interferometric lithography and holographic lithography have the characteristics of large field of view, high resolution, distortionless, relatively simple system structure, low costs and convenient realization way. They have a broad application prospect.

激光干涉光刻技术研究四川大学博士学位论文理论研究、计算模拟和实验结果分析表明，无掩模激光干涉光刻和全息光刻具有大视场、高分辨率、无畸变、系统相对简单、成本较低，实现方便等特点，具有广阔的应用前景。

In the paper a lot of computer simulations of the control system with various disturbances are done.

提出串级形式下的自学习算法，并模拟实际系统可能遇到的多种扰动，对控制系统进行大量的仿真实验。

The cold two-phase flow predictions are compared with the PDA (3-Dimensional Laser Phase Dopper Analyzer) measurements. General agreement is made between the calculated results and test data.

采用三维激光相位多普勒分析仪对冷态模型内气固两相流场进行了测量，实验结果与冷态两相流动的模拟结果基本一致。

The simulating results agree with the experimental results at different absorbed dose rate.

理论模拟结果与实际不同剂量率辐射实验结果符合得很好。

In this paper, a kind of 300MHz frequency source is designed by means of combining DDS with analog frequency doubler.

本文提出了一种DDS和模拟倍频器相结合的方法，用来产生300MHz核磁共振实验所需要的射频频率。

By taking one-year-old micropropagated K2, K3 and ordinary duplation black locust as study objects, the difference in drought resistance abilities among three clones were evaluated under stimulant natural drought and gradual drought of soil.

本实验设置了模拟自然干旱和土壤逐渐干旱两种处理，以普通二倍体刺槐为对照，研究了三个品种的一年生组培苗间与抗旱性相关的生理生化指标的差异。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。