有缺陷

It is allowable to have defects not affecting usage of the products such as slight rolled-in metal, roll mark, scratch and

带材表面应洁净平整。不允许有腐蚀、裂纹和黑条等缺陷。允许有轻微的金属及非金属压入、辊痕、擦划伤、松树枝状等不影响使用的缺陷存在。

Usage of the products such as slight rolled-in metal, roll mark, scratch, herring bone mark, residual oil stain after

板材表面应洁净，不允许有腐蚀、裂纹等缺陷。允许有轻微的金属及非金属压入、辊痕、擦划伤、松树枝状、退火油痕、矫直辊印等不影响使用的缺陷存在。

Affecting usage of the products such as slight rolled-in metal, roll mark, scratch, herring bone mark, residual oil stain

板材表面应洁净，不允许有腐蚀、裂纹等缺陷。允许有轻微的金属及非金属压入、辊痕、擦划伤、松树枝状、退火油痕、矫直辊印等不影响使用的缺陷存在。

Experts at the national cental Center for learning disability ies say we use executive function to study situations plan art and change our mines.they say problem s with the executive function are strong ly linked to attention and learning disabilities.

学习力缺陷研究中心的专家说，我们使用执行力去了解环境，计划，艺术和改变我们的思想。他们说执行力的问题和注意力缺陷，学习力障碍有很大的关系。

As to our knowledge, this is the first time to investigate systematically the defects of ZnO. The density of states and the charge density shown in this paper facilitates the analysis of experimental results such as Photoemission and absorption spectra or emission spectra.

本文首次对ZnO的本征缺陷做了系统的研究，计算了每种缺陷的态密度曲线和它对电荷密度分布的影响，这些结果对能谱和光谱等实验结果的分析会有很好的借鉴意义。

They are common defects in ZnO and play important role in the conductive and spectral properties.

这些缺陷是ZnO中最可能的点缺陷，它们对ZnO的导电性和光学性质有重要影响。

Then with the company of progress in medical technology, more and more sufferers with their family members take the doctors into court, claming that it's doctors' misconducts that cause the deficiency baby's births, such kind of case is called "life deficiency", because of its new style, complex science background, the obscure statute, it is of a rather strange phenomenon that among the same cases in ensconce bring up to different adjudications.

这样，一旦再有产妇生下缺陷儿，就有理由怀疑是由于医生检查和判断的失误而造成了缺陷儿的诞生。于是伴随着医学科技的进步，有越来越多的患者及其家属因此而将医院和医生告上法庭，指控医生因工作的失误而造成了残疾儿的出生。

Therefore, the choice of single mode in the examination and the frequency-thick band of mode has been given a particular illumination separately in the paper, following a relative numerical simulation. And a multi-cyclical sine signal modulated by Hanning window is used to simulate the excitation wave, and then an inspected ring of nodes is established to receive the echo, finally how the length of the circumferential cracks, the width of the axial cracks and the degree of the thickness-reduce effect the result is explained through the analysis of the result, further more, the reflection factor in the defect has been calculated.

因此，本文也就单一检测模态的选择以及模态频厚积段的选择分别予以了阐述，并有针对性的进行了数值计算：应用Hanning窗调制的多周期正弦波模拟单音频激励信号，并设置监测质点环接收回波，通过分析说明了管道的周向裂纹、轴向裂纹以及点蚀缺陷对缺陷回波所产生的影响，并进一步计算了缺陷处的反射系数。

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。

In Australia , about one in ten young people report having used amphetamines in the last year.

尽管有很多原因用以解释近期安非他明的使用增加了（如海洛因短缺，供给增加），很多人认为安非他明的使用者有一些个人缺陷，而这些个人缺陷与他们决定使用安非他明有关。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。