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- Field application and verification indicate that Ultrasonic Attenuation Method provides a easy,accurate and fast solution to the effective site identification of nodular cast iron and grey cast iron. 经过现场应用和验证,证明采用这种超声衰减法可以有效地解决上述球墨铸铁与灰口铸铁件的现场鉴别问题,且该方法简便、准确、快捷。
- Porosity test in carbon composites based on a new ultrasonic attenuation method 碳纤维复合材料孔隙率超声衰减测试研究
- ultrasonic attenuation method 超声衰减法
- The study indicates that the ultrasonic attenuation change is clos... 超声谐振法可显著地提高检测的精确度。
- Objective:To study the diagnostic role of broadband ultrasonic attenuation(BUA) in measurement of bone mineral density. 目的： 探讨跟骨宽带超声衰减诊断骨质疏松的临床价值。
- The results show that it is a light material that have good ultrasonic attenuation capacity between 1 MHz and 10 MHz. 研究了闭孔泡沫铝合金孔结构参数对其超声衰减性能的影响。
- ultrasonic attenuation spectrum method 超声衰减谱法
- It was found that the ultrasonic attenuation action of the gray iron was very obvious, however the ultrasonic attenuation action of nodular iron was next to nothing. 分析认为在通常采用的波长范围内,产生超声衰减的主要原因是灰口铸铁中石墨晶体的构造以及石墨组织的形状、大小和分布。
- Abstract: On the basis of ultrasonic attenuation model, a portable detector used in void content of carbon-fiber reinforced plastics in aeronautic field is developed. 摘 要: 摘要针对航空领域专用的碳纤维复合材料板材，以超声波的声衰减模型为基础，研制了用于孔隙率检测的便携式超声仪器。
- An acoustic attenuation method is given for [110]-[001] acoustic shear wave TeO_2acousto-optic deflectors. The experiment shows that it is a feasible method. 文章讨论了一种适用于[110]-[001]型TeO_2横波声光偏转器的吸声方法
- On the basis of studying a new relaxation mechanism, we revised the rate equation of anelasric strain, and then using Boltzmann superposition principle, the formula of ultrasonic attenuation with IRD is derived. 在研究新的弛豫机制的基础上,修正了滞弹性应变的速率方程,并利用玻耳兹曼叠加原理,导得具有红外发散的超声吸收公式。
- Two kinds of concrete specimens, one is crumb rubber concrete( CRC) and the other is controlled concrete, are tested as a cantilever beam for measuring their damping coefficients by the free attenuation method. 本文采用自由衰减法,对两组橡胶集料混凝土及普通混凝土小型悬臂梁的阻尼比进行了测定。
- Through comparison and analysis of the section plans, it displayed that the image effect by the centroid frequency downshift method is better than by the intensity attenuation method. 通过分析比较两种方法的成像效果图可以看出，质心频移法的成像效果要好于场强衰减法。
- internal friction and ultrasonic attenuation 内耗与超声衰减
- ultrasonic attenuation coefficient 超声衰减系数
- Broadband ultrasonic attenuation 宽带超声衰减
- broadband ultrasonic attenuation (BUA) 宽带超声衰减
- ultrasonic attenuation measurement 超声衰减测量
- Objective:To review Tripterygium Wifordii as immunosuppressant in the clinical toxicity and clinical attenuated method. 目的:综述雷公藤作为免疫抑制剂在临床上的毒副反应及临床减毒方法。
- ultrasonic attenuation measuring device 超声衰减测量仪
