查询词典 wave down

In the situation of shock wave, the interaction caused by the situation of one shock wave catching up with another is qualitatively analyzed with the result of the wave form: reflection rarefaction and incidence shock wave.

对急流冲击波的情况，从定性的角度分析了一个冲击波追赶上另一个冲击波后的相互作用，得到可能产生的波形，即反射的稀疏波和入射的冲击波。

On the basis of regular wave transformation equation in a reference[1] incorporating comprehensively environmental current,nonlinear dispersion effect,rapidly varying topography effect,energy loss due to bottom friction,refraction and diffraction, the governing equations are derived for irregular multi-directional wave transformation incorporating multi factors according to the principle of superposition of linear wave and the wave directional spectrum theory.

1引言波浪在由外海向近岸的传播过程中，由于受到复杂地形、障碍物和水流等因素的影响，波浪传播将发生变形。文献[2]对描述波浪在近岸传播变形的各种数学模型方法做了较为全面的、系统的回顾和总结。

A portion of the wave front of a spherical wave whose radius is very large can be reigned as the wave front of a plane wave.

半径很大的球面波上的一部分波前，可以看作是平面波的波前，用惠更斯原理同样可求得其波前。

Linear ocean wave theory ; Airy wave ; stationary normal process ; ocean wave spectrum ; ocean wave simulation

线性海浪理论；小振幅波理论；平稳正态随机过程；海浪谱；海浪数值模拟

This paper finds that the treatment efficiency of ultrasound wave at combined frequencies of low and high excels other fashion ultrasound wave. The combined frequencies ultrasound wave with 28 kHz and 840 kHz can compensate others trough each other and eliminate stationary wave and can make furthest effect of cavitate in liquid anywhere.

3本文从理论分析及计算机模拟超声波波形传播得出低、高频搭配的超声波对印染废水的处理效果远远高于其他方式。28kHz和840kHz频率超声波能够相互补偿对方的波谷，消除驻波，使液体各处所受超声波辐射均匀且声压均最强。

Currentyly we provide more than 60 different texture, such as straight wave, weave wave, water wave, diamond wave, etc., and more than 50 different color styles, such as pure color board, colorful board, blinking board, illuminatig board, crackled-looking board, archaized board and gold foil board, etc., coulld be used as replacement of marble, natural bark, and all these products are enviroment-friendly, moisture-proof, mildew proof,, fade resistant, distortion resistant.

currentyly我们所提供的60多个不同的纹理，如直波，编织波，水波，钻石波等， 50多个不同的颜色样式，例如纯彩色局，丰富多彩的董事会，闪烁局， illuminatig局， crackled前瞻性的董事会，董事会和仿古金箔局等， coulld被用来作为更换大理石，天然树皮，而所有的这些产品是环保友好，防潮，防霉的证据，，耐褪色，失真耐药性。

According to the theory of wavelet transformation, the singularities of the ECG signal are corresponding to the series of maximum-minimum pairs. The algorithm detects the onsets of Q wave at the scale 3 detail and offsets of T wave at the scale 4 detail. So the duration of QT is calculated by onset of Q wave and offset of T wave.

根据小波变换的原理，心电中的奇异点在变换后将产生一个模极大值和模极小值对，在小波变换3尺度上检测出QRS波群的起点，在小波变换4尺度上检测出T波终点，从而确定QT间期。

Secondary wave: An S-wave, transverse wave, or shear wave.

次波：S-波，横波或剪切波。

So, in this paper, a circular cavity witha large radius is used to replace the straight boundary of thehalf space, then the half space problem can be changed tothe scattering problem of two circular cavities to the steadyincident P-wave . Having the aid of the mature cylinderfunction theory, the general solutions of the wave functionscan be given, and an infinite linear algebraic equations ofthe unknown coefficients in the wave functions can be gottenwith the boundary conditions and the Fourier complex seriesexpansion technology, the infinite linear algebraic equationscan be approximately solved by the finite trunction withsatisfying some definite precision, at the basis of thissolution of the equation, the variations and the lay-outs ofthe DSCF at the circular cavity boundary vs. the differentincident angles, the different embedded depths of thecircular cavity as well as the different dimensionless wavenumber of the incident P-wave.

为此，本文采用一个半径很大的圆孔来代替半空间的直边界，将该半空间问题转化为一无限大空间中两个圆孔对稳态P波的共同散射问题，借助于成熟的柱函数理论，通过写出问题波函数的一般形式解，利用问题的边界条件，并采用复数傅立叶级数展开技术将其化为一个仅包含问题波函数中未知系数的一无穷线性代数方程组，在满足一定计算精度的前提下，通过有限项截断进行近似求解，进而讨论了圆孔边界处的动应力集中系数随不同入射角、不同的圆孔掩埋深度、入射波的不同无量纲波数以及介质的泊松比变化和分布情况。

The techniques of using S-wave response to investigate fractured anisotropy medium have achieved good results in practical application. However, these techniques are very complex and expensive, and then limited their application. Whenas various P-wave attributes are effectively preserved by accurate P-wave acquisition and processing techniques, thus it creates a beneficial condition to detect fracture using P-wave data.

利用横波响应进行裂缝性各向异性介质的检测在实际应用中取得了很好的效果，但技术复杂、成本较高使该方法的广泛使用受到限制，而纵波资料采集和处理技术的精细有效保持了纵波的各种属性，这为直接利用纵波资料进行裂缝检测创造了条件。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。