查询词典 persistent wave

This is due to the fact that the numerical dispersion relation of the cylindrical wave differs from that of the plane wave.

这是由于事实圆筒形的波数字散布关系不同于平的波。

In plates there exits a cylindrical bending wave, this wave runs with the same chance in all directions.

在板中的弯曲波主要为柱面波的形式，此柱面波在各方向上的传播机率相同。

It is known from high speed photography that the linear charge explosion produces a cylindrical shock wave in its middle part, and a near half ellipse shock wave in its end part.

本文通过模型试验和数值模拟计算，对条形药包整体冲击波场作了认真详细的分析和描述。

As response signal of damped free vibration could be considered as product of the harmonic wave and the unilateral exponential function and the rectangle window, the peak frequency and phase are frequency and phase of the harmonic wave signal is proved in theory in this paper.

针对自由衰减振动信号的连续谱，将其看成无限长谐波信号与单边指数函数及矩形窗的乘积，在理论上证明峰值点的频率和相位就是信号的实际频率和相位。

The standard function mode is that the system's excitation functions are sine wave, square wave and curve of free little damped vibration, the vibration's frequency are about 2Hz. The vibration mode must be in accord with the crane's work status in the vision computer.

调查表明，集装箱桥机驾驶员座椅工作中更多的是小车运行方向的前后振动，所以我们的多自由度座椅振动平台采用X方向的单自由度激励，即可实现座椅振动的大部分体感功能，同时开发成本也大大降低。

To distinctly find out the relationship between the rigidity of tablet and the ultrasonic speed,laser is emitted to the tablet and then we measure the speed of reflected surface acoustic wave and analyse the experimental data,finally get the tablet rigidity-wave speed curve.

为了清楚地了解片剂的硬度与超声波速度之间的关系，利用激光照射到片剂上，通过测定出反射的声表面波速度，且对实验数据进行分析，从而得出片剂的硬度与声表面波速度之间的关系曲线。

Objective: To explore the feasibility of decimeter wave therapy in diabetic macroangiopathy through observing the effect of decimeter wave on matrix metalloproteinase-9(MMP-9) expression.

目的：观察分米波对2型糖尿病大鼠主动脉MMP-9表达的影响，探讨分米波治疗糖尿病大血管病变的可行性。

Similar to rosiglitazone, decimeter wave could decrease the expression of MMP-9 mRNA. It was suggested that decimeter wave may treat diabetic macroangiopathy.

分米波照射同罗格列酮一样能降低2型糖尿病大鼠主动脉MMP-9 mRNA的表达，提示分米波对糖尿病人血管病变有一定治疗作用。

The main direction to reduce decollation rate of yarn is to control and stabilize yarn tension, increase the yarn mightiness and reduce weakness tache rate, especially cut down the break tension and mightiness weakness point to reduce the cross rate of tension wave crest and mightiness wave trough.

由气圈理论的研究我们可以得知：降低断头率的主攻方向是控制和稳定张力，提高纺纱强力、降低强力不匀率，尤其是减少突变张力和强力薄弱环节，以减少张力与强力的波峰与波谷交叉机率。

From 1920s up to Now, various techniques and methods for wave field decomposition, propagation and migration/imaging have been well developed, such as the Kirchhoff asymptotic method, frequency-wavenumber domain phase-shift and phase-shift-plus-interpolation methods, and the one-way wave equation based phase-screen and generalized screen methods, etc.

自上个世纪二十年代至今，波场分解、传播与偏移成像技术经历了将近一个世纪的发展，形成了多种不同的方法，如Kirchhoff波动方程高频近似解方法，频率-波数域的相移(phase-shift)方法和相移-内插方法，以及在混合域中基于单向波动方程的相位屏、广义屏方法等。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。