换能器

A kind of downhole multipole acoustic transducer transmitter with high power that is applied to petroleum tools was introduced.

介绍了一种用于石油仪器的大功率多极子阵列声波换能器激励源的设计方案。

The experimental results show that the SOM method can get the best result for lesion recognition, the recognition rate of pork tissue and liver tissue are 96.1% and 91.7%, respectively. The recognition rate for PCA-LDA method is lower than that of SOM method because the feature of tissue lesion is linear indivisible.An effective clinic scheme is developed for NETE, and some problems are discussed. For example, nonuniform temperature field conduced by nonuniform energy field; tissue database construction; movement of HIFU transducer with ultrasonic transducer; rectification of HIFU parameters.

临床方案做了总体设计，并讨论了在临床应用中需要考虑的一些问题，如因HIFU辐射能量分布不均匀导致的焦域的温度场不均匀的问题，数据库的建立问题，HIFU换能器和超声探头的位移的问题以及HIFU辐射参数的确定问题等。

The perovskite phase formation process and microstructure were investigated and also the dielectric and p...

研究表明，准同型相界附近的BS-PT陶瓷是一种优良的压电换能器和传感器材料。

This paper has studied preparation of Grignard reagents under phonochemistry and optimum technologic conditions is: the power of ultrasonic is 500W and frequency is 250KHZ, having twelve energy conversion devices, water bath temperature being 20C, solvent being THF,unstirred.

本文探讨了超声波合成格利雅试剂的机理，研究了声化学法制备格利雅试剂氯化苄基镁的最佳工艺条件为：在超声波的功率为500W，频率为25KHZ，有12个换能器的条件下，水浴温度为20℃，以THF为溶剂，不搅拌。

An upgoing and downgoing arrangement of transducers in a logging tool, largely to offset spurious changes in reading caused by variations in borehole size or sonde tilt.

指换能器在测井仪器中的上、下配置方式，主要用来补偿由于井眼尺寸变化或探头倾斜所引起的测井读数的不合理变化。

In this text,according to home and abroad scholars's study on design of sonochemical reactor and parameters of ultrasound cavitation, I designed the sonochemical reactor cohered with transducers on its side wall, and study cavitation field and ultrasound field distribution by changing power and frequency ,and made research in absorption of different power and frequency ultrasound traveling in water, and especialy study the cavitation with different sound intensity.

笔者综合国内外学者关于声化学反应器的设计思路，设计了侧壁黏结换能器清洗槽式声化学反应器，改变频率定性测量反应器中的声场和空化场分布，研究不同频率的超声在水中传播的吸收情况、声空化和声压或声强的关系以及一定频率的超声在水中的有效空化范围。

At present,there are three methods ofimproving definition of type-B ultrasonic image: adopting transducer array;usingtechnique of dynamic focalizing and image enhancement.

目前，提高B 型超声图像的清晰度(主要是提高其横向分辨率)主要采用超声换能器阵列，利用动态聚焦技术和对获得的超声图像进行图像增强的处理方法。

Study on Magnetostrictive Material of Fe-Ga Alloy Abstract In application of numerous sensors and actuators, the study of giant magnetos...

在声纳换能器和传感器技术应用领域，具有大的磁致伸缩应变系数、低的饱和磁化场、高的机械强度的磁致伸缩材料的研究一直受到人们的关注。

In this paper,a ultrasonic peening device based on piezoelectric ceramic transducer is firstly developed successfully.

本文研制成功了一种基于压电陶瓷换能器的新型超声冲击试验装置。

Tarting as a small scientific research institute, SIUI has developed into a key high-tech corporation at the national level, and is the leading manufacturer of ultrasonic instruments in China.

IUI从一个小型科研机构发展成集超声显像诊断仪、超声工业检测仪、超声换能器的研产销于一体的国家级重点高新技术企业和产权多元化的股份制公司。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。