无损

In order to ensure the accuracy and reliability of NDT,theories about acoustic wave scattering from rough surfaces were studied.

为保证超声无损评价检测的准确性和可靠性，本文研究了粗糙界面的声波散射理论。

In this paper the feasibility of taking the boundary of the theoretical model as adiabatic is firstly studied.

本文在实验研究的基础上，通过"模型分割"，并结合一维理论模型的结果，给出脉冲红外热成像无损检测三维理论模型的一种近似解法。

In recent years, SAW devices have been extensively applied in present wireless communication field, optical fiber communication network, aerial traffic control, electronic warfare, nondestructive examination, sonar, and television technique for their merits of minitype, high reliability, good consistency, multifunction, flexibility of design and so on.

由于声表面波器件具有小型、可靠性高、一致性好、多功能以及设计灵活等优点，所以它在现代无线通讯领域、光纤通讯网络、空中交通管制、电子战、无损检测、声纳以及电视技术中得到了广泛的应用。

Nevertheless, visualization is not limited to the medical field and has great potentials in nondestructive flaw detection, geology and aerography domains as well.

然而可视化技术并不局限于医学领域，根据不同的数据，可视化技术在工业无损探伤、地质勘探、气象等领域都有巨大的应用潜力。

Pulsed Eddy Current is an effective method that has been demonstrated to be capable of quantifying flaw in airframe structure.

脉冲涡流是一种可以对飞机结构中缺陷进行有效检测的电磁无损检测技术。

We applied ATR Fourier Transform Infrared spectra and second derivative spectra to analyze the alcoholicity and content of sugar of red wines produced by different manufacturers for the first time.

首次采用衰减全反射傅里叶变换红外光谱法并结合二级导数谱对市售的若干种不同厂家葡萄酒的酒精含量和糖含量进行了快速无损分析。

So people make great efforts to inspect the carburized materials in NDT perfectly. In this thesis, the characteristics of carburized layer and ECT system were studied by numeric simulation and finite element method.

本文运用数值模拟、涡流检测和有限元分析等方法对材料的渗碳层特性及其无损检测问题进行了系统研究，为渗碳层深度的涡流检测及材料表面改性质量的无损评价提供了重要的理论依据。

A method of using ultrasonic guided wave to detect the length of grate column of half buried under different highway roadbed, belongs to nondestructive testing field.

利用超声导波无损检测半埋置于不同高速公路路基中的护栏立柱长度的方法，属于无损检测领域。

For the sensor and hardware of wire rope tester has been mature, on the basis of the full-scale analysis of history and current situation of wire rope nondestructive testing in the domestic and overseas country, a research direction has been proposed that the feature extraction of the relevant characteristic with the broken wires quantitative inspection and research on effective recognition algorithm.

由于钢丝绳无损检测的传感器和硬件检测装置已基本趋于成熟，论文在全面分析了国内外钢丝绳无损检测技术历史及现状的基础上，针对钢丝信号的特点，确定了以&与钢丝绳断丝损伤定量相关的特征量提取和有效的识别算法&为基础的研究方向。

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。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。