查询词典 explosive wave

In the process of building and using the mass concrete structures, because of the effect of out-side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance Using nondestructive testing method to test the concrete"s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseasesThis dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic FEM to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, Researched the principles of the first-arriving waves" phase when the cracks" depths are not same, obtained the relation between the inversion point and the cracks" depth, which has the direction sense in the application of projects,The second part of this dissertation is CT , which used the ultrasonic wave running through the tested-substance to get arriving-time of the ultrasonic wave, then inverse the image This dissertation drawed one CT program which can well present the different little cells ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested-substance, CT has the better using foreground..

在混凝土结构的施工及使用过程中，由于受其自身及外界各种因素的影响，常常会产生一些缺陷，对结构物的承载能力和耐久性造成严重影响，采用无损检测技术进行质量检测和健康诊断，这对混凝土结构开展安全、稳定性评估以及病害隐患治理研究具有重要意义。本论文主要针对大体积混凝土结构缺陷的检测方法展开研究工作，重点讨论了超声波法检测混凝土结构裂缝的基本原理和方法及其特点、适用范围，运用动力有限元数值模拟其检测过程，探讨了有裂缝缺陷的混凝土结构在脉冲荷载作用下弹性波的传播及其变化特征，研究了不同裂缝深度下首波相位变化规律，得出了反转临界点与裂缝深度之间的关系，这对实际工程应用具有指导意义。声波CT是一种新的无损检测技术，它是利用声波穿透被检测体获取声波接收时间，来进行计算机反演成像的技术。本文利用直射线法编制了层析成像程序，能较好地呈现被检测物体各微小单元的声波速度分布图像，从而对检测体的质量状况作出诊断评估，具有较好的应用发展前景。

On the basis of analyzing the output signal of a two wavelength beat-wave absolute distance interferometer, this paper proceeds from the realities of the aiming method of the beat-wave interferometer, conducts an analytical investigations on the dependence of the aiming accuracy of the beat-wave interferometer on laser dual-line output power equilibrium, propose two new concepts-a basic aim blind area and a blind area expansion, and establishes an analytical expression between the blind area expansion and the relative power difference of laser dual lines.

本文从拍波干涉仪对准方法的实际出发，在分析双谱线拍波干涉仪输出信号的基础上，研究了双谱线功率不一致与拍波干涉仪对准精度的关系，提出了基本对准盲区和盲区扩大量的新概念，建立了描述盲区扩大量与双谱线相对功率差之间关系的解析表达式。

The relationship between the laser plasma acoustic wave and laser plasma shock wave is also studied. A method to judge the mechanical effect of the laser plasma shockwave according to the character values of the laser plasma acoustic wave is got.

论文还分析研究了激光等离子体声波和激光等离子体冲击波力学效应的关系，提出了利用激光等离子体声波特征量判断激光等离子体冲击波力学效应的方法。

The numerical model of non-linear wave in harbor, including the non-coupled and non-linear wave numerical model, the numerical model combined Boussinesq equations with Laplace equation and the coupled numerical model combined Boussinesq equations with Euler's equations, are studied.The studies on non-coupled and non-linear wave numerical model are following.

本文分别以Boussinesq方程，二维和三维Laplace方程，欧拉方程和牛顿第二定律作为基本控制方程，分别从非耦合非线性波浪计算模型(指单独采用一个计算模型：本文指Boussinesq方程，或边界元法解Laplace方程，或有限元法解Laplace方程)、Boussinesq方程与Laplace方程耦合计算模型、Boussinesq方程与欧拉方程耦合计算模型三个方面对港口非线性波浪计算模型展开了研究。

Through our studies, we concluded that the mesoscale disturbance spreading along the tangential and radial direction respectively has the characters of transverse wave and symmetric inertia-gravitational wave. Nevertheless, the mesoscale disturbance in the area of super-gradient current nearby the eye-wall of Typhoon has the features of the mixed vortex Rossby-inertia-gravitational wave.

研究认为切向和径向传播的中尺度扰动分别具有横波和对称型重力惯性波性质，但在台风眼壁附近的超梯度流区的中尺度扰动具有混合涡旋Rossby波－重力惯性波特征。

Seismic anisotropy can be studied by four basic seismic wave behaviors, e.g, direction-dependent travel time anomalies, shear-wave birefringence, surface-wave scattering, and direction-dependent conversion of compressional waves to shear waves.

目前人们利用4种基本的地震波现象研究地震各向异性，如横波双折射、面波散射、与传播方向有关的走时异常和PS转换波震相。

But the dependency of the first type compression wave and the shear wave is much smaller than that of the second type compression wave.

通过对比u-w和u-p方程的结果，首次定量说明了u-p方程适用于包含地震工程在内的大多数工程问题。

The frequency-dependent sensitivity coefficients with respect to the parameters of the radial layers are computed quantitatively. Comparing the horizontal permeability with the vertical permeability, the horizontal mobility plays the predominant role over the entire frequency range. The Stoneley wave is more sensitive to the velocity of the horizontally propagating SH wave than the flexural wave.

利用灵敏度曲线定量研究了不同频率下地层各个参数对相速度和衰减系数的贡献大小，主要结果显示模式波的衰减受水平渗透率影响明显，而垂直渗透率的变化对模式波几乎无影响；斯通利波对水平向传播的横波速度比弯曲波的灵敏度高。

A second larger wave of residential housing mortgage failures;(2) The first big wave of auto loan failures and repossessions;(3) Over $40 billion in credit card defaults, smashing the bank lenders;(4) The first wave of commercial mortgage failures and foreclosures on shopping malls, office buildings and other commercials;(5) And

超过400亿美元的信用卡违约，将打击银行贷款；（ 4 ）第一波购物商场、办公楼和其他商业地产的抵押贷款止赎权丧失；（ 5 ）最后，无保证金资金或定金的CDS交易将上演华丽的终场乐章！我们今天听到的总数是500万亿美元！我甚至不能形容这个数字。

A second larger wave of residential housing mortgage failures;(2) The first big wave of auto loan failures and repossessions;(3) Over $40 billion in credit card defaults, smashing the bank lenders;(4) The first wave of commercial mortgage failures and foreclosures on shopping malls, office buildings and other commercials;(5) And finally, the grand smashing finale of CDS Credit Default Swaps originated with No margin money or down payments!

在明年春天，我们看到：（ 1 ）第二次大浪潮住宅按揭失败；（ 2 ）第一大浪的汽车消费贷款的失败和收回；（ 3 ）超过400亿美元的信用卡违约，打破了银行贷款；（ 4 ）第一批失败和商业抵押贷款抵押品赎回权的购物商场，办公楼和其他商业广告；（ 5 ），最后，大砸最后的CD信用违约互换起源无保证金资金或订金！

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！