超声波

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。

The optimal processing conditions for ultrasonic extraction of anthocynin from Emilia sonchifoli were obtained by single factor and orthogonal tests.

在单因素实验的基础上用正交实验法确定了超声波辅助提取一点红花色素苷的最佳工艺条件。

Lab scale ultrasonic testing can obtain the structural direction of orthotropy.

实验室超声波测试可以找出正交各向异性的结构方向。

Ultrasonic transducers, oscillatory source circuit, receiving signal disposal circuit, and an a/d chip formed the peripheral circuit of the real-time measurement system.

该实时测量系统的外围电路包括超声波传感器、发射器振荡电路、接收器信号处理电路和a/d芯片。

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。

The application of oscillograph principle in ultrasonic imaging is based on the electronic oscillograph imaging principle.

示波器原理在超声成像中的应用是以电子示波器的成像原理为基础，通过医用超声换能器将以机械波形式存在的超声波转换成同频率的交变的电信号，将该信号以不同的方式输入示波器中，从而形成了不同方式的超声图像。

Objective: To explore the effect of low intensity pulsed ultrasound on the osteogenesis of rabbit bone marrow stromal cells in vitro.

目的：研究低强度脉冲超声波对体外培养的兔骨髓基质细胞成骨能力的影响。

Name: PP boxesIntroduction: our factory produce high quality standard PP boxes, PVC boxes, PET boxes. Printing skill include: offset, silk-screen, etc. Color gradual change, bronzing, atomize part is available in our factory. We do cutting, PP boxes oversew by ultrasonic.

产品简介：、品名： PP 盒简介：本公司大量生产各类高档 PP 盒， PVC盒，PET盒，可柔印，胶印，丝印；可彩色渐变，烫金，局部印磨砂；可冲切， PP 还可超声波烫合。

In the research, toluene and xylene were employed as raw materials, Mn/Mn , Ce/Ce and Mn/MnO_2 as oxidative medias, respectively. Corresponding oxidants Mn, Ce, MnO_2 were electrolyzed through sonoelectrooxidation method, and were applied to oxidate the raw materials to prepare benzaldehyde and its derivatives under the ultrasonic radiation.

在研究中选择甲苯和二甲苯为原料，分别以Mn／Mn、Ce／Ce和MnO_2／Mn为氧化媒质，通过超声电氧化的方法，电解得到相应的氧化剂Mn、Ce和MnO_2，并在超声波作用下，将其用于氧化原料制备相应的苯甲醛及其衍生物。

Objective To compared the divergence among physical palpation,mammography and ultrasonography.

目的 肿瘤大小是乳腺癌临床分期中的决定因素，为此我们比较了物理查体、X线检查和超声波检查在乳腺肿瘤测量中的差异。

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。