波传播

Finally, applications of the anomalous propagation of microwave in tropospheric ducts are discussed: in connection with concrete radar parameters, effects of ducts on radar range and detection performance are discussed, the results obtained are of great value for the overall design of radar systems; by use of the interference standards of ITU-R, the co-ordination area of satellite earth-station under tropospheric ducts environment is studied ; by explaining the relationship between evaporation duct and advection fog, a new way to forecast sea advection fog from evaporation duct is provided.

最后讨论了对流层大气波导环境下电波异常传播特性的应用：结合具体的雷达系统参数，模拟计算了大气波导对雷达作用距离及发现概率的影响，对雷达系统的总体设计具有重要的参考价值；对表面大气波导环境下的卫星地球站通信协调区域进行了确定，从理论上很好地给出了协调距离量级的概念，为卫星地球站与地面微波站之间的协调提供了依据和参考；分析了利用海面蒸发波导来快速预测平流海雾的新方法，完善了平流海雾的预报方法，对海上安全作业和生产具有重要的意义。

The transverse wave disturbance along tangential base flow of circular vortex is discussed By using numerical method we study this instability of baroclinic flow which is mesoscale inertia wave instability on the cylindrical coordinate The influence of stratification stability N 2 , Coriolis parameter f 0 , the vertical shear of tangential wind z of the ambinent atmosphere and the latent heat on the growth rate of instability is studied From the above analysis and calculation, we can learn that there are Eady mode and mesoscale mode of transverse wave instability in circular vortex as well Furthermore we also learn that distribution character of mesoscale mode disturbance field of transverse wave instability, anomalistic "cats eye" structure of lower level and the character of the slowly spreading disturbance converges at low level and the quickly spreading disturbance converges at high level

作者中文名：李红金；陆汉城；宋晓亮；李鲲摘要：讨论涡旋大气中，存在沿切向基流传播的横波型扰动，并采用数值方法讨论了柱坐标系下圆形涡旋系统斜压气流中这类扰动的不稳定，这是一类中尺度的重力惯性波的不稳定。研究了涡旋环境大气的层结稳定度参数N2、切向风垂直切变Vz、凝结潜热、涡旋特性及科里奥利参数f0对不稳定增长率的影响。圆形涡旋中同样存在横波不稳定的Eady模态和中尺度模态，得到了中尺度模态的扰动场分布特征：流场的不规则"猫眼"结构及慢速传播的扰动均集中在低层，而快速传播的扰动均集中在高层的扰动特征。

It is because that detonation and deflagration waves cannot propagate in the same direction when f is convex.

这是因为在流函数为凸的条件下，爆轰波只能是前向波而爆燃波只能是后向波，它们不能在同一方向上传播因而也就不可能出现上述转化。

In this paper, an all fluid Kraken normal model is employed to analyze the propagation characteristics of shallow water channels.

本文采用了一种全液态Kraken简正波模型，对位于浅海信道的目标海区的传播特性进行分析，得到了不同传播条件下信道的传播损失和频率特性图，为水声通信系统的设计提供了理论基础。

We also give the latitudinal distribution of wave speed from what we could tell the reason for steady propagation during that period.

针对绕极波纬圈传播的不连续现象，提出了南极绕极波是行波和驻波共存系统的新见解。

The mechanical wave of a micro particle propagates through its matter wave and the spare energy discharged during the exchange from the state of stimulus back to the old position spread through the mechanical wave. Meanwhile, matter micro particle can be passed through the energy that frees it from the state of stimulus. All this leads to the wave-particle duality phenomenon, and based on that, the theory of quantum was established.

微粒的机械波以它的物质波为媒介进行传播，并且微粒从激发状态回到原来的位置所放出的多余能量能够随机械波传递，同时物质微粒能够随着使它可以逃脱激发状态的能量进行传递的这一过程，就出现了物质的波粒二象性现象，根据这一现象，建立起来的新理论就是量子学理论。

The mechanical wave of a micro particle propagatesthrough its matter wave and the spare energy discharged during theexchange from the state of stimulus back to the old position spreadthrough the mechanical wave. Meanwhile, matter micro particle canbe passed through the energy that frees it from the state ofstimulus. All this leads to the wave-particle duality phenomenon,and based on that, the theory of quantum was established.

微粒的机械波以它的物质波为媒介进行传播，并且微粒从激发状态回到原来的位置所放出的多余能量是随机械波传递，同时物质微粒能够随着使它可以逃脱激发状态的能量进行传递的这一过程，就出现了物质的波粒二象性现象，根据这一现象，建立起来的新理论就是量子学理论。

Based on the fact that the different modes of Rayleigh wave have different propagation velocities, the signals of Rayleigh wave which superposes in time domain can be separated in frequency-wave-number domain, different modes of Rayleigh wave are separated and extracted by Fourier transform.

摘 要：应用Fourier变换法分离提取地震记录中不同模态的瑞雷面波，其原理是：利用瑞雷面波各模式传播速度的差异，将时间域中叠加在一起的瑞雷面波信号在频率波数域中分开，以此实现分离提取各阶模态瑞雷面波。

3D effect is analyzed and the average velocity of wave propagating in the pile, which mainly influences inverse interpretation, is discussed. Finally, the theory results are verified by model experiment. It is shown that 3D results have the same phase with ID results. The pile radius, the duration of impulse, the ratio of hammer radius to pile radius and shear velocity of the soil around the pile have influences on 3D effect. The best position of receiver is 0.55R from the pile center. The average velocity of wave propagating in the pile reduces due to transversal inertia effect and 3D effect.

结果表明：三维曲线与一维结果在相位特征上一致；波场图直观地反映了波在桩中的传播规律；三维效应与桩径、激振脉冲宽度、相对激振半径及桩周土剪切波速有关；传感器放在0.55R处可以得到干扰较小的信号；三维效应和横向惯性效应的存在会使桩中的波速减小，土的性质对波速影响不大；反演精度与缺陷的性质、激振条件有关。

The study on Rayleigh wave characteristics in layered soil shows that shear wave velocity of soil can be attained.

许多学者对瑞利波在地基中的传播特性的研究表明，瑞利波能够反演地基土的剪切波速度，而剪切波速度跟地基土特性又有联系，因此，可以利用瑞利波法来反演地基土的特性。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。