超声波

The study for the comprehensive utilization of Syringa oblata and Syringa reticulata var for preparations.

本实验分别采用水蒸气蒸馏法、乙醇回流法以及超声波提取法对紫丁香和暴马丁香中的挥发油进行提取，本研究为实现丁香的综合利用做前期准备。

The company is an enterprise with technology-intensive.

本公司创辧於一九八九年，主要从事超声波清洗设备的设计、开发、生产及销售。

Along with the science and technology unceasing development, the survey technology is more and more advanced, from the primitive manual surveying computation to the cyclostrophic wind cup survey technology, to uses modernized again the laser, the ultrasonic wave as well as the infrared and so on each kind of telesthesia technology surveys; At the same time, the survey result is more and more precise.

随着科学技术的不断发展，测量技术越来越先进，由原始的人工测量计算到旋转风杯测量技术，再到采用现代化技术的激光测，超声波以及红外线等各种传感技术来测量；同时，测量的结果越来越精确。

The application case into a geotechnical investigation of a tunneling project shows that the new acoustic borehole televiewer can give large quantities of effective and apparent data rock mass around borehole, and these data are very good basis for the quantitative analysis of engineering design and point out one effective access to improve the technological level of geotechnical investigation.

通过在某隧道工程区勘察工程中的应用研究，说明新一代超声波钻孔电视可以提供大量有效可视的钻孔岩体定量数据，为工程设计的定量化分析提供了详细的数据资料，为提升现有的工程勘察技术水平提供了一条有效的技术途径。

However, many uncon ventional logging methods present their advantages. This paper introduces two of them that are used success fully in the horizontal wells abroad: borehole televiewer and ultrasonic logging technique.

近些年国外已推出多种水平并非常规测井技术，井下电视和超声波测井技术是近2年水平井生产测井中的应用较多的两种技术。

The robot has a sophisticated sensor system, which includes ultrasonic sensors, tentacle sensors and a vision sensor.

机器人上装有一个复杂的传感器系统，包括超声波传感器、触觉传感器、视觉传感器等。

Repeating freeze thawing and supersonic wave comminution to split thalline.

通过反复冻融和超声波粉碎法裂解菌体。

Ultrasonic cleaning and ultrasonic thickness gauge is only a part of ultrasound technology, there are many areas can be applied to ultrasound technology.

超声清洗与超声波测厚仪仅是超声技术应用的一部分，还有很多领域都可以应用到超声技术。

The dissipation factor tip-up D tan d , the change of capacitance D C / C 0, the maximum discharge q max and the mean discharge magnitude q mean , A compared investigation of the correlations between V min , V av and service time were compared with those between D tan d , D C / C 0, q max, q mean and respectively.

对大量的不同运行年数的线棒进行了超声波 V min 和 V av 测量，以及介质损耗角增量 D tan d 、电容变化率 D C / C 0、最大放电量 q max 和平均放电量 q mean 等电气测量试验，对比研究了超声参数( V min 和 V av )和电气测量参数( D tan d 、 D C / C 0、 q max 和 q mean )与运行年数的相关性，发现， V min 和 V av 与的相关性很强，相关系数 R 分别为0.892和0.890，而 D tan d 、 q max 和 q mean 与的相关性较弱， R 在0.55~0.60范围内， D C / C 0与几乎没有相关性， R 仅为0.310；采用线性回归分析，分别建立了 V min 和 V av 与的二阶和三阶线性函数的数学模型， R-S 分别为0.828和0.903，并分别提出了最可靠运行年数和置信度为95％的可靠运行年数的预测方法。

The invention relates to a preparation process for synthesizing polyethylene terephthalate 1, 3- terephthalate catalyst, which comprises adding titanic acid ester, germanium compounds and cobalt compound into liquid dispersed phase of organic solution, wherein the total weight concentration is 4-10%, and preparing the catalyst through mechanical stirring or ultrasonic wave mixed ligand for 10-60 minutes in 0-120 DEG C, wherein the adding content of titanic acid ester, germanium compounds and cobalt compound are respectively 200-500ppm, 50-300ppm and 100-400ppm of reaction monomer mass of terephthalic acid or dimethyl terephthalate.

本发明涉及一种合成聚对苯二甲酸1，3-丙二醇酯催化剂的制备方法，将钛酸酯、锗化合物和钴化合物加入到有机溶剂的液体分散相中，总重量浓度为4～10％，在0-120℃通过机械搅拌或超声波混配10-60min制得；钛酸酯、锗化合物和钴化合物加入量分别是对苯二甲酸或对苯二甲酸二甲酯反应单体质量的200-500ppm、50-300ppm、100-400ppm；用此催化剂制备PTT产品，酯化和缩聚反应时间相对于单独使用钛酸四丁酯缩短了30-60min，产品特性粘数0.70-1.05dL/g，色相b值在2-6之间，切片可用于加工新型合成纤维及工程塑料产品。

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。