波

A strict proof of the hyperbolicity of the multi-class LWR (LighthillWhitham-Richards) traffic flow model, as well as the descriptions on those nonlinear waves characterized in the traffic flow problems were given. They were mainly about the monotonicity of densities across shocks and in rarefactions.

证明了交通流多等级LWR(Lighthill-Whitham-Richards)模型的双曲性质，并根据交通流的特征给出关于其非线性波的描述，主要包括车流通过激波和稀疏波时密度和速度的单调性变化。

It keeps the same when the hypocenter location deviates from the center of the slab.

发现当俯冲板块中存在6%的低速异常时，直达P波和直达S波之间存在波阵面近平面的易于识别的P-S转换震相，其传播方向不因震源位置偏离低速层的中心而改变。

This paper presents an effective external illuminator based bistatistic continuous wave radar clutter canceling algorithm to overcome the problem.

针对这一问题，通过对直达波及多径反射杂波的到达时间进行分数插值估计，提出了一种连续波雷达杂波相消算法。

This finished the embedding process, and the test results show that this algorithm has certain imperceptivity and robustness. Because of the same embedding intensity, on one hand, it leads to the decline of the quality of the carrier image and influence the transparency and robustness of the watermark.

在此基础上，本文介绍了一种传统的基于小波变换的数字水印算法，这种算法将数字水印小波分解后的各个子带，嵌入到原始载体图像第三级小波子带中去，实现了水印的嵌入，试验结果显示该算法具有一定的不可见性和鲁棒性。

Because this algorithm has some better performance to reconstruct the incident wavefront, and refers to the nonlinear responses of the influence function, a new solution to correct the wavefront aberration by the CMDM is found.

结果表明，基于模拟退火的波前模式复原算法具有良好的波前复原性能，并且可结合影响函数的非线性特征描述，为连续膜波前复原控制问题提供一种新的解决途径。

MMDM correction capability is analyzed and a closed-loop correction model of adaptive optical system is established. An adaptive optical experimental system based on MMDM is built. Moreover, wavefront from human eyes is used as the incident wavefront of adaptive optics system.

搭建基于MMDM 的自适应光学实验系统，采用人眼出射波前作为原始波前进行实验，结果表明，模型能快速有效的对动态畸变波前进行校正，为基于MMDM 的自适应光学系统提供了算法支持。

We consider that the inertial force of blood flow and the relaxation of left ventricular are the causes of forming the reversal gradient.

在此过程中形成了重搏波，而血压波的反射并不是形成重搏波的主要原因。

The establishment and initiatory application of this new measurement method shows that it is feasible to study elastic velocities and equation of state of widely earth's interior materials in advance under high pressure and high temperature.

新的弹性波速测量方法的建立和初步的应用研究，表明在高温高压条件下进一步广泛地开展对地球深部物质的弹性波波速及状态方程的研究成为可能。

The phase anomaly zones are investigated on the basis of the integral theorem of Helmholtz and Kirchhoff in terms of the Kirchhoff′s boundary conditions and the physical meaning of the integral for the diverging and converging spherical waves.

从波动方程出发，在基尔霍夫边界条件下，根据积分的物理意义，简明地研究了发散和汇聚球面波的相奇异区域分布。结果表明，除了汇聚的球面波焦点区域存在相奇异现象外，焦点以外的区域及对发散的球面波同样存在相奇异现象。

In the computation of aerodynamic forces, the present work is based on the work of Morino et al., but the following aspects are improved:(1) In computing the steady transonic aerodynamic load, the steady transonic nonlinear integral equation is solved by relaxation-iteration method in this thesis, instead of solving the time dependent transonic nonlinear integral equation, so that the computing time is saved greatly;(2) The influence coeifficients represented by volume integral are transformed to surface integral by using the Gaussian Theorem, so the analytical form of these coeifficients can be obtained and this leads to be more convenient to analyse and compile computer program;(3) The shock capturing method is used in every time step in present work, no shock moving term is added in the integral equation, so that it is more convenient and simpler to treat.

在气动力计算方面，本文基于Morino等人的工作，作了如下几方面的改进：（1）在计算定常跨音速流场（作为非定常绕流计算的初场）时，本文采用松驰迭代法直接求解跨音速定常非线性积分方程，而不是采用时间相关法求解非定常非线性积分方程，这样大大节省了计算机时；（2）将以体积分形式出现的影响系数化为面积分，并获得解析公式，这样便于分析和编写程序；（3）对运动的激波，本文通过在每一个时间步长上采用激波捕捉法而得到，而不是在积分方程中附加激波运动项，因而处理起来简单方便得多。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。