ultrasonics

• Ultrasonics - field characterization - test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields
  超声波.声场特性.与医疗诊断超声场有关的热和机械指数测定的试验方法
• Ultrasonics - physiotherapy systems - performance requirements and methods of measurement in the frequency range 0 , 5 mhz to 5 mhz iec 61689 : 1996 ; german version en 61689 : 1996
  超声波学.理疗系统.频率范围0 . 5mhz至5mhz的测量方法
• Ultrasonics - hand - held probe doppler foetal heartbeat detectors - performance requirements and methods of measurement and reporting iec 61266 : 1994 ; german version en 61266 : 1995
  超声波.手持传感式多普勒胎儿心跳探测仪.性能要求及
• So the impact of ultrasonic cleaning is clearly recognizable . but to truly understand the value of ultrasonics , one must understand how ultrasonic cleaners really work
  超声波清洗对工业的推动和影响是显而易见的，要真正理解超声波的价值，我们需要进一步了解超声波的原理。
• Ultrasonics - fields ; guidance for the measurement and characterization of ultrasonic fields generated by medical ultrasonic equipment using hydrophones in the frequency range 0 , 5 mhz to 15 mhz
  超声场.用水听器在频率范围0 . 5mhz - 15mhz由医学超声设备产生的超声场的特性和测量指南
• Ultrasonics - fields - guidance for the measurement and characterization of ultrasonic fields generated by medical ultrasonic equipment using hydrophones in the frequency range 0 . 5 mhz to 15 mhz
  超声波学.场.频率范围0 . 5mhz - 15mhz超声波医疗设备含水听诊器引起的超声场的特性和测量指南
• Ultrasonics fields . guidance for the measurement and characterization of ultrasonic fields generate by medical ultrasonic equipment using hydrophones in the frequency range 0 , 5 mhz to 15 mhz
  超声场.使用频率范围在0 . 5mhz至15mhz水下听音器的医疗超声设备所产生的超声场的测量和特性化指南
• Besides policy factors , five methods of cost - cutting of biodiesel are reviewed , including new raw material with higher oil content , shorter regeneration cycle , which is suitable for infertile soil and different climatic conditions ; heterogeneous catalysts ; new technologies ( e . g . supercritical methanol and ultrasonics ) ; higher added value utilization of by - product glycerin with simple method ( propylene oxide chloride , 1 , 3 - propanediol , pyruvic alcohol etc . ) and moderate scale of production
  摘要综述了除政策因素外，降低生物柴油生产成本的5种方法：选择含油率高、再生周期短、适应贫瘠土地及不同气候条件的新型植物原料；研究新型固体催化剂；引入新工艺（超临界法和超声波法） ；使用比较简便的方法将废弃的甘油转化为高附加值的产品（环氧氯丙烷、 1 , 3 -丙二醇、丙酮醇等）以及适度生产规模等。
• The work in this thesis is based on the combination of medicine - ultrasonics and the image processing . with the computer as an platform , several kinds of processing were conducted on the b images of hearts captured in clinic , such as image enhancement and edge detection . and pertinent information from the b images were extracted and used in synthesizing the m images of the heart in arbitrary directions
  本论文将医学超声学与数字图象处理两门学科结合起来，以计算机为平台，利用数字图象处理方法，对心脏的b型图象进行了图象增强、边缘边检测等处理，并从b型图象上提取出相关信息，合成了全方位的m型图象。
• The progress of laser ultrasonics has been discussed especially for the laser - generated surface acoustic wave . the transform process of energy from light to ultrasonic has been analyzed . the generation mechanism of laser - generated surface acoustic wave has been discussed in detail excluding thermo - elastic mode and illumination mode
  介绍了激光超声领域的研究进展，分析了光致超声过程中，能量从光能到声能的转换，归纳了用激光激发声表面波的机理，讨论了两种主要的模型：热弹模型和融蚀模型。