本研究将“边缘层模型”应用于两层流体系统中弱非线性内波在台阶地形上的反射和透射问题的研究。
The edge-layer theory is applied to study the refection and transmission of the weakly nonlinear internal wave over a step in a two-layer fluid system.
第二个实例是自引力介质中弱非线性波的渐近周期解及色散关系。
The second example is the asymptotic periodic solution and the dispersion relation of weakly non-linear waves in a self-gravitating medium.
本文应用多重尺度约化微扰方法研究了充满流体的圆形弹性管壁上应力波的弱非线性调制问题。
The reductive perturbation method of multiple-scales is used to investigate the weak nonlinear modulation of the stress wave on the wall of a fluid-filled elastic circular tube.
而在弱逆风作用下，大部分中尺度范围重力波都能够传播到观测高度。
And under the condition of propagating against weak wind, most of medium-scale gravity waves can reach observation height.
针对红外图像可视化程度弱、对比度低的问题，提出一种基于轮廓小波变换和区域能量的红外与可见光图像融合算法。
For visualization and contrast of IR images are weak, this paper proposed an algorithm for infrared and visible images fusion using wavelet-based contourlet transform (WBCT) and region energy.
研究了含弱阻尼和源项的非线性波方程初边值问题。
The initial boundary value problem of the nonlinear wave equation with the weak damping term and a source term was studied.
弱非线性和孤波。
引力波的信号非常弱，以至于爱因斯坦自己都怀疑是否能开发一个足够敏感的装置来捕捉这种现象。
Signals from gravitational waves are so weak that Einstein himself questioned whether a device sensitive enough could be developed to capture this phenomenon.
和宇宙中的其他三种力(电磁力、弱核力、强核力)相比，重力就微弱得多了，所以引力波很难被观测。
Compared with the other three forces in the universe (electromagnetism, the weak nuclear force and the strong nuclear force), gravity is relatively feeble, making gravitational waves hard to detect.
弱反射波信号识别是声波法煤层厚度探测中的一个关键问题。
To identify the signal of the weak reflected wave is a key problem to detect the thickness of the coal seam by using elastic wave.
本文利用耦合波理论分析推导了单模平面光波导中两波混合的耦合波方程和弱相干光放大率的表示式。
The coupled equation of two-wave mixing and expressions for weak beam amplification in a single mode waveguide are deduced by application of coupled wave theory.
本文应用WKB方法研究了在弱非均匀层结大气中，当基本气流具有弱垂直切变时，重力惯性内波的稳定性问题。
This paper discusses the stability of internal inertial gravity wave in the heterogeneous stratified atmosphere when basic flow appears to be weak vertical shear by the WKB method.
最后考察了均匀弱间断情况下加速度波的波幅演化规律。
Finally, in the context of homogeneous weak discontinuity, the evolution of the amplitudes of acceleration wave is analyzed.
针对离散小波变换具有平移变化性和弱方向性的特性，本文提出了一种基于双树复小波变换(DT- CWT)统计模型的医学图像纹理检索方法。
Presents a novel texture retrieval approach of medical images based on statistic model by Dual-Tree Complex Wavelet Trans - form (DT-CWT) for the shift sensitivity and poor directionality of DWT.
针对强噪声背景中的弱信号检测问题，在经典随机共振处理方法的基础上，利用小波良好的去噪特点，提出了随机共振加小波去噪检测弱信号的新方法。
Concerning the detection of weak signal in stronger noise background, a novel method was proposed in terms of stochastic resonance processing and by using the better de-noise feature of wavelet.
引力波通常非常弱，以至于科学家们从未直接探测到过。
Gravitational waves are normally so extraordinarily weak that scientists have never detected them directly.
论文第二章研究了等离子体中横向扰动下的(3 +1)维弱非线性离子声波，得到了描述离子声孤波的(3 + 1)维kp方程。
In chapter two, the (3 + 1) dimensional weakly nonlinear ion acoustic wave at higher order transverse perturbations in plasma was discussed and described by the Kadomtsev-Petviashvili (KP) equation.
由于目的层反射弱、多次波发育，地震资料品质差，为此二次三维采集时选择了近似全三维的观测系统；
The quality of seismic data was poor because complex and special geological conditions make the reflectivity of the objective formations weak and multiples strong.
在弱束流的条件下，四种离子声波模式中有两种分别对应慢孤波和快孤波。
Under the weak beam conditions, there are four ion acoustic wave modes, of which, two correspond to the slow and fast solitary waves.
在超声反射回波的数学模型基础上，利用小波滤波方法对超声信号进行预处理，提取强噪声背景中的弱回波信号。
This paper attempts to preprocess ultrasonic signal by wavelet filtering based on the mathematical model of the ultrasonic echo, extracts weak echoes from signal with high noise background.
一些试验表明，符号位水平迭加方法强调反射波的相干程度，因而在剖面上突出了弱反射波。
Some experiments show that the sign bit horizontal stack method emphasizes the coherence of reflections, thus weak reflections on the section are enhanced.
寻常波从强场侧、弱场侧和顶部发射时，通过适当的调整波的发射条件，也能得到理想的传播结果。
O-mode waves launched from all of the three positions can propagate ideally by properly adjust the launch conditions.
本发明还公开了所述基因缺失菌株在制备支气管败血波氏杆菌基因缺失疫苗（弱毒活疫苗）的应用。
The invention also discloses the application of the gene deleted bacterial strain in preparing the Bordetella bronchiseptica gene deleted vaccine (attenuated live vaccine).
分析了爆破弱应力波作用下中远区裂纹的端部应力场。
Analyzed end stress field of far district slight crackle under blasting dynamic.
邻边比率法可以有效的消弱比例误差对测距的影响，使电磁波测距的精度得到提高。
The ratio between adjacent sides can effectively decrease affection of the proportional errors in distance measuring, and the accuracy may be increased.
邻边比率法可以有效的消弱比例误差对测距的影响，使电磁波测距的精度得到提高。
The ratio between adjacent sides can effectively decrease affection of the proportional errors in distance measuring, and the accuracy may be increased.
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