波

Based on wave propagation feature, this paper analyses 3D seismic migration algorithms such as alternating direction implicit method, LU decomposition method, and inverse operator approach method. The result shows that the alternating direction implicit method is fast but causes distortion in wave field extrapolation and affects image accuracy; however LU decomposition and inverse operator approach methods are fast while holding circular symmetry of wave field, and are promising in oilfield exploration and development.

在波的传播特征分析基础上，对交替方向隐式法、LU分解法、逆算子逼近法等三维地震偏移算法进行了分析研究，结果表明，交替方向隐式法虽然快捷但是在波场外推中明显产生畸变并影响成像的准确性，而LU分解和逆算子逼近法是保持波场圆对称特征前提下的快速算法，在油田勘探开发中具有较好的应用前景。

The P-wave velocity-depth profile and electrical conductivity-depth profile can be calculated from the experimental data and the fundamental geothermal parameters in northern margin of the North China craton. The comparison of the calculated results with the elastic and electrical structure of this area reveals that the v of amphibolite is approximately equal to the middle crust, the electrical conductivity of amphibolite intersects the range of the middle and lower crust in this area.

利用实验获得的弹性波纵波速度及其温度系数和压力系数以及电导率与温度的关系，结合现今华北克拉通地热学的基本参数，计算得到斜长角闪岩的弹性波纵波速度－深度剖面和电导率-深度剖面，将二者分别与华北克拉通北缘深部地壳的弹性及电性结构进行对比的结果表明：高温高压下绿泥石化斜长角闪岩的弹性波纵波速度与该地区中地壳速度相当，电导率介于中、下地壳范围内。

By making up of time-frequency local property and multi-scale analytical capability of wavelet transformation and self-learning and prediction function of artificial neural network,chapter three develops a prediction model loose combining wavelet analysis and Radial Basis Functionsneural network,abbreviated as Wavelet-RBFNN.

第三章利用小波变换的时频局域化特性和多尺度分析能力及神经网络的自学习、预测功能，通过小波分析与神经网络的松散型结合方式，建立小波分析和径向基函数神经网络(Wavelet-RBFNN)预测模型。

This paper detail describes the type,production process and some properties of absorber in anechoic chamber.

详细介绍了电波暗室用吸波材料的种类、制造工艺，以及电波暗室用吸波材料的反射率、阻燃性、耐功率等性能指标，为暗室建造企业在选择吸波材料时提供参考。

The results were analyzed with the statistical software package spss10.0.results ①between two groups,there was no significant difference about the affection of age,sex and the destribution and location of aneurism on prognosis outcome(p＜0.05).however,the grading of hunt hess and fisher in group a(gos＞3) showed significantly lower than in group b(gos≤3),（p＜0.001）;② there was no significant difference in the frequency of heart rate, st elevation, st depression,t wave inversion,u wave inversion and ventricular arrhythmia(p＞0.05).the frequency of abnormal q wave, supraventricular arrhythmia and the ecg scores in group a showed significantly lower than in group b （p＜0.05,p＜0.001）;③the ecg scores was the most powerful multivariate risk stratified(ecg ≥5 vs ecg＜5; p=0.002,or=0.010,95%ci 0.001~0.173).conclusion the ecg score, a new and simple method of semi quantification, was a powerful risk predictor for patients with sah.

应用spss10.0 统计包分析结果。结果①在年龄、性别、动脉瘤生长部位影响动脉瘤性sah预后方面，两组病例无明显差异（p＞0.05）。而按sah后hunt hess分级和fisher分级，gos＞3病例的分级要明显低于gos≤3的病例的分级（p＜0.01）；②两组在心率、st段抬高、st段压低、t波倒置、u波倒置、室性心律失常出现的频率无明显差异（p＞0.05）；在异常q波和室上性心律失常出现频率及心电图评分方面，gos＞3的组别明显低于对照组（p＜0.05，p＜0.001）；③心电图评分是sah患者预后最显著影响的变量（p=0.002，or=0.010，95%的可信区间0.001~0.173）。结论心电图评分作为一种新型、简便的半定量方法，能有效的预测蛛网膜下腔出血病人的预后。关键词：心电图；预后；评分；蛛网膜下腔出血

This paper focuses attention on studying the basic theory of wide angle reflection and analyzing some typical models by using Gauss Ray forward extrapolation, by which people can draw some important conclusions .

对广角反射的基本原理作了较为深入的研究，同时通过典型模型实例，采用高斯射线正演的分析方法，得到了一些重要的结论：采用广角反射可以得到信噪比比常规方法高的地震信息，这对地震数据的处理十分有用；广角反射波信息出现在直达波以外，炮检距很大，但能量比非广角反射波能量高。

This method involves analysis of the phase shift of the temperature wave, which is propagated through the specimen as a function of the square root of the angular frequency of the temperature wave.

中文翻译：温度波分析法涉及分析相移温度波，这是通过标本宣传作为一个功能的温度波的平方根角频率的函数。

The conditions of antinode and node formed on the ground are also discussed.

讨论了电磁波垂直于地层传播时，与反射电磁波干涉产生的驻波，并得出在地面形成波腹与波节的条件。

When moving the ion from the node of the standing-wave laser to the antinode, the frequency of the vibration becomes less, the longer time of the disentanglement between the internal and external degrees of freedom.

当离子质心的位置从驻波激光场的波节移向波腹，囚禁离子熵演化的振荡频率变小，离子与声子自由度退纠缠的时间变长。

Record the Signal Generator frequencies and the distances between adjacent antinodes for the next three resonant modes by adjusting the frequency in the Signal Generator window and by sliding the detector coil from one antinode to the next antinode.

为测量下面三个共振模，需要调节信号发生器窗口的频率，以及将探测线圈从一个波腹移动到另一个波腹，同时记下信号发生器的频率和相邻波腹间的距离。

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％。