Based on the theory of elastodynamics, the interaction of elastic surface acoustic waves with surface-breaking defect is studied numerically by using the finite element method.
基于弹性动力学理论，采用有限元方法数值模拟了声表面波沿金属表面传播及其与表面缺陷相互作用的过程。
Detection of surface-breaking cracks has been realized by signal processing method using the reference signal from a surface without flaws. The principle and experimental results are given.
本文以无缺陷时的表面回波为参考信号，用信号处理方法，识别表面缺陷回波，从而实现对表面缺陷的检测。文中给出了该方法的原理及实验结果。
Drilling technology has improved, allowing tunnels to be dug without breaking the surface.
在钻孔技术发达的今天，打通地下隧道已经不会伤及地表了。
In other words, they flipped a switch, which allowed them to change the electrical conductivity of the silicon without making or breaking a single chemical bond within the surface.
或者说，他们扳动了一个开关，改变了硅的电导率，而不需破坏表面上的任何化学键。
For a while they sat, and Suchen remembered the splash of a fish breaking the surface of the water, and two egrets taking off with unhurried elegance, one after the other.
她们坐了一会儿，苏晨还记得有鱼跃出水面，两只白鹭一先一后飞起来，姿态优雅从容。
The interaction between simple diatomic molecules such as CO and transition metal surfaces may lead to breaking and making chemical bonds and trigger important surface catalyzed reactions.
简单双原子分子CO与过渡金属间的相互作用，可能导致化学键的断裂与形成，并且引发重要的表面催化反应。
The regulatory protein identified by Dr Craig's team inhibits the spread of cancer cells by removing and breaking down an invasive enzyme on the surface of cancer cells.
Craig的团队鉴定的这种蛋白可以通过去除并分解肿瘤细胞表面的一种侵袭性酶而抑制肿瘤细胞的扩散。
Breaking the waves: the shark-like Seabreacher X can reach surface speeds of 50mph and has the turning style of a dolphin.
破水而出：形如鲨鱼的SeabreacherX潜艇可以以50英里每小时的时速畅游水面，并且能够做出类似海豚的转体动作。
Breaking process of PET fibers is discussed through analyzing changes of surface morphology of PET fibers in this paper.
本文通过研究聚酯纤维表面形态结构的变化来探讨聚酯纤维的断裂过程。
The actual cause of the quake itself is the rupturing or breaking of rocks at or below the earth's surface.
地震本身的真正原因是地球表面的或地底下的岩石断裂或破裂。
The actual cause of the quake itself is the rupturing or breaking of rocks at or below the earth's surface.
震本身的真正原因是地球表面的或地底下的岩石断裂或破裂。
SpaceShipOne will fly 100km (62 miles) above the Earth"s surface, just breaking through the planet"s atmosphere.
“太空飞船一号”将会在距离地球表面100千米（62英里）的上空飞行，这个高度刚刚超出地球的大气层。
The friction between billet and mold is an effective parameter reflecting billet surface quality, optimizing technologic parameters and predicting breaking out.
连铸坯与结晶器间摩擦力是反映铸坯表面质量、优化工艺参数和进行拉漏预报的有效参数。
The MisterMesh? drainage rolls accelerate liquid removal by breaking the surface tension of conglomerated droplets of liquid thus increasing capacity and reducing pressure drop.
通过阻断聚集液体分子的表面张力加快速脱湿速度，并增加容量，减少压降。
In the light of the frequent breaking of the rod string in a surface driven screw pump well, the force condition of the string in the well is analyzed by means of the elastoplasticity theory.
针对井口驱动螺杆泵抽油杆柱断脱频繁的问题，应用弹塑性理论分析了抽油杆柱在井中的受力状况。
Hardness, tensile strength, breaking elongation ratio and aging property of samples were tested and surface of sample after aging was represented by SEM.
对试样进行了硬度、拉伸强度、断裂伸长率、热老化等性能试验；对老化后的试样表面进行了SEM表征。
There are bundles of meridians breaking through the surface at the center of this vortex.
在地磁涡流中心处有成束的地磁线穿过表面。
The breaking surface and dispersing fragments bring some difficulties to the surface restoration of dynamic process including impact or explosion process.
在冲击、爆轰等动态过程的研究中，被测三维表面将发生破裂及碎片飞散等过程，为动态过程的三维重建带来困难。
Structure of depressurization injection allocator and viscosity- breaking injection allocation, as well as their primary surface test results, are introduced.
介绍了降压配注器和降黏配注器的结构以及初步地面试验结果。
There were two typical characters in the soil surface of H1 and H2, which were breaking up of aggregates easily and sharply tightening of surface soil.
在降雨过程中，H1、H2表土结构的变化有两个显著特征，一是团聚体容易破碎，二是表土迅速紧实。
Suddenly, like a lump of submerged wreckage breaking the surface of water, the thought burst into his mind: 'It doesn't really happen.
突然，像一条沉船露出水面一样，他的脑海里出现了这个想法：“这并没有真的发生。
The cutting experiments for difficult to machine materials have shown that the cutting rate can be increased much more, the surface quality improved and the probability of wire breaking reduced.
对难加工材料的切割实验表明：复合工艺能较大幅度地提高加工效率，改善表面质量，降低断丝概率。
Underground pounding and crusting , which in turn leads to liquid breaking through to the surface of the.
的设计速度会降低，这样会导致地下重击和生成渣壳，结果废水将会冲破地表面流到地面上。
The rate of heat transfer in mould affects significantly on the surface quality of slab and protection of steel breaking in continuous casting.
在连铸过程中结晶器的传热速率对铸坯的表面质量和防止漏钢都具有十分重要的影响。
Stereo light microscope which possesses relatively large depth of field, good performance in real-time and no breaking surface of sample, is used in stereo three-dimensional information measurement.
体视显微镜具有工作空间大、实时性高以及不损坏样品表面等优点，己用于微观对象三维立体信息的测量。
Mainly for the asphalt pavement cracks, pits and side issues such as eating, cement concrete pavement surface is also a serious breaking of the rupture and other issues.
沥青路面主要表现为裂缝、坑槽和啃边等问题，水泥混凝土路面也出现严重的挤碎、破裂等问题。
The system has feature of high emulsion breaking, high control of ferric ion, low surface tension and so on.
体系具有破乳率高、控制铁离子能力强和表面张力低等特点。
Thee actual cause of the quake itself is the rupturing or breaking of rocks at or below the earth's surface.
地震本身的真正原因是地球表面的或地底下的岩石 裂或破裂。
The device cannot generate static electricity easily in the process of stretch breaking, and fibers cannot wind on the surface of the rollers.
该装置纤维在牵切过程中不易产生静电，且纤维在罗拉表面不产生缠绕。
The spiral shape of the fracture surface indicates that the shaft had been overloaded by a high torque prior to breaking.
螺旋外形地断裂面标明，该井已超负荷由一个高转矩之前，要突破。
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