超声波的

Hydrometer Metering Co., Ltd. is a wholly foreign owned company, directly invested by the Hydrometer GmbH.Hydrometer Metering Co., Ltd. is engaged in production, marketing and sales of Heat Meters, Cold Meters, Heat/Cold Meters and Systems for Remote Meter Reading in different sizes and technologies.

山东荷德鲁美特表计有限公司是德国荷德鲁美特公司在中国直接投资的独资企业，主导产品为户用机械式能量表和户用超声波式能量表，并提供全系列、全口径的能量表产品，是德国技术和中国市场完美结合的典范。

The results indicate contents of silicon have the direct effect on solidification structure of ingot by ultrasonic treatment.

结果表明，在保温条件下，溶质Si的含量对超声波处理后铸锭的凝固组织有直接的影响。

With the features of a high resolution, efficiency jerque, ultrasonic CT technology will play an importance part in building foundation tests.

通过实例说明超声波CT技术作为一种高分辨率、高准确率、高效率的检测介质内部结构的技术，在基础建设中能够发挥重要的作用。

Work theory, measure method of ultrasonic waves flowmeter and its application in salt production is introduced, some questions in selection and application of the flowmeter are pointed out.

介绍了超声波流量计的工作原理，测量方法及其在制盐生产中的应用，并提出了选用时应注意的一些问题。

On the signal processing opinion, the received thermo-acoustic signals is deal with wavelet technique, the noise depressing and wavelet analyses method are very useful for the MITA signals.

从信号处理的角度，基于小波分析的噪声抑制技术也被应用到对测量的微波热致超声波信号进行处理。

Based on the flow velocity compensation of the mixing length theory,the frame of the system hardware is designed in noncontact flow measurement.

基于流体的混合长度理论，讨论了超声波非接触测量中的流速补偿问题，给出了测量系统的硬件结构框图。

In our population, increased nuchal translucency thickness is the most important ultrasonographic marker of trisomy 21. In contrast, the nasal bone seems to have a less prominent role in identifying the fetus at risk for trisomy 21 due to its lower detection rate.

在我国人口中，透明膜厚度的增加是21三体综合症最重要的超声波标指标，相比之下，鼻骨似乎在诊断胎儿患21三体综合症风险上没有那么重要，这主要是其低的检出率。

In our population, increased nuchal translucency thickness is the most important ultrasonographic marker of trisomy 21. In contrast, the nasal bone seems to hae a less prominent role in identifying the fetus at risk for trisomy 21 due to its lower detection rate.

在我国人口中，透明膜厚度的增加是21三体综合症最重要的超声波标指标，相比之下，鼻骨似乎在诊断胎儿患21三体综合症风险上没有那么重要，这主要是其低的检出率。

The calculation methods are presented for the reflection and transmission of ultrasonic waves incident from the fluid on to the arbitrary orientation interface of the general anisotropic solid. It is found that the reflection and transmission coefficients depend on, in general, the elastic parameters of the media, orientation of anisotropic solid surface and incident angle.

考虑到由流体斜入射到各向异性固体时超声波模式转换的一般情况，给出了超声在流体和各向异性固体任意取向界面上反射和折射问题的求解方法；超声反射和折射系数是媒质弹性参数、界面取向及入射角的函数。

Gas Production Engineering Research Institute,Southwest China Oil Gas field Company,Guanghan 618300,China）Abstract: Basic principle of time of flight diffraction method was described. Two scan modes D scan and B scan were discussed and the phase characteristic of oscillogram and grey-scale map was also studied. Formula to calculate the location and size of defects was given. The image analysis was carried on three typical defects on standard blocks.

摘 要：描述了超声波衍射时差法的基本原理，讨论了平行扫查和非平行扫查两种扫查方式，研究了波形图和灰度图两种缺陷图谱的相位特征，推导了缺陷精确定位定量的计算公式，并通过标准试块试验对三种典型缺陷进行了图谱分析。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。