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Next, the Tyler frequency is determined by which the tilt cut-off residual error of a diffraction angle is applied.

然后以一个衍射角为截止均方根残差,根据实际测得的湍流功率谱确定Tyler频率。

In the case of the small angular displacement, the natural frequency of the corresponding undamped linear system is obtained, which is consistent with the experimental observation.

通过讨论与小角位移无阻尼情形对应的线性无阻尼自由振动微分方程,得到了相应的固有频率,与实验结果一致。

Our theory has successfully explained a serious of experimental observations and predicted several new types of photoelectron angular distribution.

研究发现,复合相位Bessel函数的性质决定了光电子角分布的主要特点及其随激光强度、频率以及光电子能量的演化。

Angular frequency of the highest bird wings humming bird, 90 dBnHl.

振翅频率最高的鸟:角蜂鸟,90次/秒。

In order to analyze the vibration characteristics of the high speed dick system,which was an important component of the submuniton angular motion hardware-in-the-loop simulation,the mechanics model was firstly derived.

为了分析子弹角运动半实物仿真装置中快圆运动系统的固有频率及其对整个装置的影响,利用La-grange方程建立了快圆运动系统的动力学方程,得出该系统的质量矩阵和刚度矩阵,对其进行模态分析;同时利用有限元软件仿真,验证了理论分析结果。

Simulations based on finite integration method are carried out in a wide frequency range for a balanced feeding finite wide-angle biconical antenna and many results including input impedance and far fields are obtained.

利用基于有限积分法的电磁场仿真技术对平衡馈电的有限长宽角双锥天线作了计算,得到了天线在很宽频带内输入阻抗、远区辐射场与频率的关系曲线。

This thesis has discussed the theory of measuring distance in ultrasonic, which include ultrasonic shaking transmit velocity, central frequency, angle of launch control, measure distance, dynamic measure and so on. According to character of wave shape output by circuit, this thesis has designed an efficient way to diminish noise that enables precision of the ultrasonic sensor to 0.2%.

论文详细论述了超声波测距的基本理论,包括超声波震动传播速度、中心频率、发射角控制、发射能量、检测距离、动态检测等;并根据电路输出波形特征设计了有效的降噪方法,使超声波传感器的精度达到了0.2%,然后对降噪后的信号进行了标定。

It is customary to plot the amplitude ratio in decibels and the phase angle in degree against the common logarithm of the input frequency.

在绘图时通常幅值用分贝表示,相角用度表示,输入信号的频率按常用对数取值。

Based on description method of damping motion in mechanical vibration, variables movement of generator are divided into two basic motion models: damping oscillation and critical damping motion. Detail methods of extracting damping parameters from simulation data is introduced to establish variable motion models. An approximate method is put forward to simulate low-frequency signal and generator response characteristic, from which motion models and damping parameters of main variables are obtained. The influences of oscillation amplitude, frequency and initial operating point of power system to the motion damping parameters are analyzed.

借鉴机械振动中阻尼运动的描述方法,将低频振荡下发电机主要变量的运动归纳为阻尼振荡和临界阻尼两种基本运动形态;介绍了从仿真数据提取阻尼参数建立参数运动模型的方法,实现对发电机振荡特性的量化分析;提出一种系统侧低频振荡信号的近似模拟方法,并应用于发电机响应仿真,获得了主要变量的运动模型和阻尼参数;分析了系统侧振荡幅度、频率以及初始工况对发电机功角振荡的影响。

Dynamic derivatives of a 60° delta wing and F-18 aircraft model are calculated by this method, and then the effects of the amplitude,the frequency and the change of angle of attack on the dynamic derivatives are studied.

对60°三角翼和F-18飞机模型进行动导数仿真计算,研究了不同振幅、频率及迎角变化对动导数的影响。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。