声波

For example, quartz crystal microbalance has been the most extensively used in mass sensing devices.

如石英晶体微天平被运用在感测质量的微量变化，利用铌酸锂晶体制作的表面声波元件被运用在感测温度的微量变化。

In order to collect the week signal in microvolt, this experiment use acoustic-electric acquisition system based on virtual instrument technology.

电信号的观测，研究声波速度与温度的变化关系，以此验证了以电代声来测试冻土动力学性质的可行性。

At last,the application of the transducer in bridge NDE was introduced.

最后以某桥梁声波 CT 无损评价为例说明其广泛的应用。

Blue Cosmos is a relaxing and pleasing sonic excursion into the cosmic netherworld and beyond.

蓝宇宙是一个放松和愉悦声波漂移到宇宙地狱及以后。？

Universe deluxe Cyclonus w/Nightstick, gun can mount to hand and hand retracts

Universe系列加强级探长，附带机器狗以及其他纪念品，机器狗可以安装到探长背部，也可以放到声波体内。

The scattering characteristics of plane acoustic waves by fluid-saturated porous cylinders are studied by using the Biot-Stoll's theory with consideration of loss factors, such as the viscosity of fluid and the nonelastic loss of solid skeleton.

依据Biot-Stoll的流体饱和多孔媒质声传播理论，考虑了流体粘滞和骨架非弹性损耗引起的衰减因素，研究了多孔圆柱体对平面声波的散射特性。

In this paper, we discuss the numerical solutions of the Helmholtz equation with damping boundary conditions:Where G ?

本文主要讨论由时间调和声波产生的具有阻尼边界条件的Helmholtz方程的数值解：其中？

It has been developed to be a cross-subject of numerical and applied mathematics and system science.

声波散射反问题是一类典型的数学物理反问题，在无损检测、医学成像、遥感、雷达、声呐、石油、地矿和海洋探测等领域都有着广泛而重要的应用空间，迄今已发展成为融合计算数学、应用数学和系统科学的具有交叉性的热门学科方向，对其计算方法的研究正吸引着国内外众多学者的浓厚兴趣。

To solve these problems, this paper presents two new schemes for numerically treating acoustic scattering problems.

针对这些问题，提出了两种处理声波散射问题的新方案。

For case study, db4 optimum wavelet base is used to transform GR, SP and AC from a well in Shengtuo oilfield. By this transformation the logging data are expended from one dimensional depth space into two dimensional depth-scale space.

以胜坨油田某井为例，采用db4最佳小波基分别对自然伽马、自然电位和声波等测井曲线进行了多尺度分析，将一维测井数据拓展为二维深度－尺度空间，提取小波变换系数的时频色谱信息和能量信息，从而确定出测井曲线识别准层序界面的最佳尺度。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。