以下为句子列表：
英文: A two-dimensional plain strain finite element model of infinite plate is developed to investigate the ultrasonic wave propagation and scattering on three kinds of cracks: parallel to the surface, 450 oblique angle to the surface, and quarter-circle.
中文: 摘要建立了无限长板的具有吸收边界的二维平面应变有限元模型，在研究了脉冲超声波在无限长板中传播的基础上，对板中平行于表面的裂纹、与表面成45°的斜裂纹和四分之一圆周弧形裂纹三种情况的脉冲超声波散射进行了重点研究。
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英文: Abstract: In order to obtain the mechanical properties of cemented soil,a series of cemented soil specimens with different cement ratios are conducted through uniaxial compression tests and ultrasonic wave tests.The link of the compressive strength of the
中文: 文摘:本文通过室内抗压实验及超声波波速实验的方法，对不同水泥掺入比下水泥土的力学性能进行了研究，获得了水泥土材料棱柱体抗压强度与立方体抗压强度之间的关系，以及抗压强度与波速之间的关系式。
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英文: Base on discuss, choosing Mongolian Scotch Pine and Manchurian Ash as experiment species, using three kinds of wood fire-retardant treatment methods which included soaking at some pressure, pressurized soaking under ultrasonic wave and the pressurized soa
中文: 在讨论的基础上，以樟子松和水曲柳为木材试样，选择压力浸渍、超声波加压浸渍和微波处理后超声波加压浸渍3种木材阻燃处理方法，经过试验，说明在生产阻燃木材的浸渍方法中引入超声波技术是可行的。
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英文: The installation method of the inputting type ultrasonic is flexible.The vibrator can be installed on the bottom of the channel to make the ultrasonic wave radiate upward；it aslo can be installedon the side of launch ultrasonic wave towards the sides.When
中文: 投入式超声波振子安装方式灵活，振子可以安装于槽底，使超声波向上辐射，也可以安装于侧面向侧面发射超声波，当标准型的清洗机不能达到清洗要求时，就可采用投入式超声波振子，制造能适应各种不同清洗要求的清洗机。
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英文: The principle of the ultrasonic method applied to measure elastic coefficient is by measuring the velocity of ultrasonic wave propagation in the solid material to obtain the elastic module, shear modulus and poisson ratio.
中文: 摘要弹性系数的超声检测，即借助固体弹性常数与超声波波速间的固有关系，通过测量纵波及横波在固体中的传播速度来获取材料的弹性模量、剪切模量及泊松比。
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